diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index c5542c86..c7744fc4 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -2,9 +2,9 @@ name: C/C++ CI
 
 on:
   push:
-    branches: [ master, develop, issue-* ]
+    branches: [ master, develop, refactoring, issue-* ]
   pull_request:
-    branches: [ master, develop ]
+    branches: [ master, develop, refactoring ]
 
 jobs:
   build:
@@ -12,10 +12,16 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v2
-    - name: cmake
+    - name: Checkout Code
+      uses: actions/checkout@v2
+
+    - name: Configure
       run: cmake -DCMAKE_BUILD_TYPE=Release -DLIBIPC_BUILD_TESTS=ON .
-    - name: make
+
+    - name: Build
       run: make -j
-    - name: test
-      run: export LD_LIBRARY_PATH=./lib:$LD_LIBRARY_PATH && ./bin/test-ipc
+
+    - name: Test
+      env:
+        LD_LIBRARY_PATH: ./lib
+      run: ./bin/test-ipc
diff --git a/.github/workflows/codecov.yml b/.github/workflows/codecov.yml
new file mode 100644
index 00000000..e10e8923
--- /dev/null
+++ b/.github/workflows/codecov.yml
@@ -0,0 +1,34 @@
+name: Upload CodeCov Report
+
+on:
+  push:
+    branches: [ refactoring ]
+  pull_request:
+    branches: [ refactoring ]
+
+jobs:
+  build:
+  
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v2
+
+    - name: Configure
+      run: cmake -DCMAKE_BUILD_TYPE=Debug -DLIBIPC_BUILD_TESTS=ON -DLIBIPC_CODECOV=ON .
+
+    - name: Build
+      run: make -j
+
+    - name: Test
+      env:
+        LD_LIBRARY_PATH: ./lib
+      run: ./bin/test-ipc
+
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v4.0.1
+      with:
+        verbose: true
+      env:
+        CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
diff --git a/.gitignore b/.gitignore
index 9bca0610..0f34e242 100644
--- a/.gitignore
+++ b/.gitignore
@@ -43,8 +43,5 @@ target_wrapper.*
 CMakeLists.txt.user*
 
 # My output files
-build
-
-# vs
-.vs
-.vscode
\ No newline at end of file
+build*
+.*
\ No newline at end of file
diff --git a/3rdparty/capo/make.hpp b/3rdparty/capo/make.hpp
deleted file mode 100755
index 908849ce..00000000
--- a/3rdparty/capo/make.hpp
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include <type_traits>  // std::decay
-#include <utility>      // std::forward
-
-namespace capo
-{
-    template <template <typename...> class Ret, typename... T>
-    using return_t = Ret<typename std::decay<T>::type...>;
-
-    template <template <typename...> class Ret, typename... T>
-    inline return_t<Ret, T...> make(T&&... args)
-    {
-        return return_t<Ret, T...>(std::forward<T>(args)...);
-    }
-}
\ No newline at end of file
diff --git a/3rdparty/capo/noncopyable.hpp b/3rdparty/capo/noncopyable.hpp
deleted file mode 100755
index cb70a114..00000000
--- a/3rdparty/capo/noncopyable.hpp
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-namespace capo {
-
-////////////////////////////////////////////////////////////////
-
-class noncopyable
-{
-protected:
-    noncopyable(void) = default;
-    ~noncopyable(void) = default;
-public:
-    noncopyable(const noncopyable&) = delete;
-    noncopyable& operator=(const noncopyable&) = delete;
-};
-
-////////////////////////////////////////////////////////////////
-
-} // namespace capo
\ No newline at end of file
diff --git a/3rdparty/capo/random.hpp b/3rdparty/capo/random.hpp
deleted file mode 100644
index 78f0e60b..00000000
--- a/3rdparty/capo/random.hpp
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include <random>   // std::default_random_engine, std::uniform_int_distribution
-#include <utility>  // std::forward
-
-namespace capo {
-
-////////////////////////////////////////////////////////////////
-/// Simple way of generating random numbers
-////////////////////////////////////////////////////////////////
-
-template <class Engine       = std::default_random_engine, 
-          class Distribution = std::uniform_int_distribution<>>
-class random : public Distribution
-{
-    using base_t = Distribution;
-
-public:
-    using engine_type       = Engine;
-    using distribution_type = Distribution;
-    using result_type       = typename distribution_type::result_type;
-    using param_type        = typename distribution_type::param_type;
-
-private:
-    engine_type engine_;
-
-public:
-    template <typename... T>
-    random(T&&... args)
-        : base_t (std::forward<T>(args)...)
-        , engine_(std::random_device{}())
-    {}
-
-    result_type operator()(void)
-    {
-        return base_t::operator()(engine_);
-    }
-
-    result_type operator()(const param_type& parm)
-    {
-        return base_t::operator()(engine_, parm);
-    }
-};
-
-} // namespace capo
diff --git a/3rdparty/capo/scope_guard.hpp b/3rdparty/capo/scope_guard.hpp
deleted file mode 100755
index 306b6891..00000000
--- a/3rdparty/capo/scope_guard.hpp
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include "capo/noncopyable.hpp"
-#include "capo/unused.hpp"
-#include "capo/make.hpp"
-
-#include <utility>      // std::forward, std::move
-#include <algorithm>    // std::swap
-#include <functional>   // std::function
-
-namespace capo {
-
-////////////////////////////////////////////////////////////////
-/// Execute guard function when the enclosing scope exits
-////////////////////////////////////////////////////////////////
-
-template <typename F = std::function<void()>>
-class scope_guard : capo::noncopyable
-{
-    F destructor_;
-    mutable bool dismiss_;
-
-public:
-    template <typename F_>
-    scope_guard(F_&& destructor)
-        : destructor_(std::forward<F_>(destructor))
-        , dismiss_(false)
-    {}
-
-    scope_guard(scope_guard&& rhs)
-        : destructor_(std::move(rhs.destructor_))
-        , dismiss_(true) // dismiss rhs
-    {
-        std::swap(dismiss_, rhs.dismiss_);
-    }
-
-    ~scope_guard(void)
-    {
-        try { do_exit(); }
-        /*
-            In the realm of exceptions, it is fundamental that you can do nothing
-            if your "undo/recover" action fails.
-        */
-        catch(...) { /* Do nothing */ }
-    }
-
-    void dismiss(void) const noexcept
-    {
-        dismiss_ = true;
-    }
-
-    void do_exit(void)
-    {
-        if (!dismiss_)
-        {
-            dismiss_ = true;
-            destructor_();
-        }
-    }
-
-    void swap(scope_guard& rhs)
-    {
-        std::swap(destructor_, rhs.destructor_);
-        std::swap(dismiss_,    rhs.dismiss_);
-    }
-};
-
-namespace detail_scope_guard {
-
-struct helper
-{
-    template <typename F>
-    auto operator=(F&& destructor) -> decltype(capo::make<scope_guard>(std::forward<F>(destructor)))
-    {
-        return capo::make<scope_guard>(std::forward<F>(destructor));
-    }
-};
-
-} // namespace detail_scope_guard
-
-#define CAPO_SCOPE_GUARD_V_(L)  CAPO_UNUSED_ scope_guard_##L##__
-#define CAPO_SCOPE_GUARD_L_(L)  auto CAPO_SCOPE_GUARD_V_(L) = capo::detail_scope_guard::helper{}
-
-/*
-    Do things like this:
-    -->
-    CAPO_SCOPE_GUARD_ = [ptr]
-    {
-        if (ptr) free(ptr);
-    };
-*/
-
-#define CAPO_SCOPE_GUARD_ CAPO_SCOPE_GUARD_L_(__LINE__)
-
-////////////////////////////////////////////////////////////////
-
-} // namespace capo
\ No newline at end of file
diff --git a/3rdparty/capo/spin_lock.hpp b/3rdparty/capo/spin_lock.hpp
deleted file mode 100644
index 8ca2635e..00000000
--- a/3rdparty/capo/spin_lock.hpp
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include <atomic>       // std::atomic_flag, std::atomic_signal_fence
-#include <thread>       // std::this_thread
-#include <chrono>       // std::chrono::milliseconds
-#if defined(_MSC_VER)
-#include <windows.h>    // YieldProcessor
-#endif/*_MSC_VER*/
-
-namespace capo {
-namespace detail_spin_lock {
-
-////////////////////////////////////////////////////////////////
-/// Gives hint to processor that improves performance of spin-wait loops.
-////////////////////////////////////////////////////////////////
-
-#if defined(_MSC_VER)
-/*
-    See: http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
-    Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() YieldProcessor()
-#elif defined(__GNUC__)
-#if defined(__i386__) || defined(__x86_64__)
-/*
-    See: Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
-         PAUSE-Spin Loop Hint, 4-57
-         http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() __asm__ __volatile__("pause")
-#elif defined(__ia64__) || defined(__ia64)
-/*
-    See: Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
-         hint - Performance Hint, 3:145
-         http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
-#elif defined(__arm__)
-/*
-    See: ARM Architecture Reference Manuals (YIELD)
-         http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
-#endif
-#endif/*compilers*/
-
-#if !defined(CAPO_SPIN_LOCK_PAUSE_)
-/*
-    Just use a compiler fence, prevent compiler from optimizing loop
-*/
-#   define CAPO_SPIN_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
-#endif/*!defined(CAPO_SPIN_LOCK_PAUSE_)*/
-
-////////////////////////////////////////////////////////////////
-/// Yield to other threads
-////////////////////////////////////////////////////////////////
-
-inline void yield(unsigned k)
-{
-    if (k < 4)  { /* Do nothing */ }
-    else
-    if (k < 16) { CAPO_SPIN_LOCK_PAUSE_(); }
-    else
-    if (k < 32) { std::this_thread::yield(); }
-    else
-    { std::this_thread::sleep_for(std::chrono::milliseconds(1)); }
-}
-
-} // namespace detail_spin_lock
-
-////////////////////////////////////////////////////////////////
-/// Spinlock
-////////////////////////////////////////////////////////////////
-
-class spin_lock
-{
-    std::atomic_flag lc_ = ATOMIC_FLAG_INIT;
-
-public:
-    bool try_lock(void)
-    {
-        return !lc_.test_and_set(std::memory_order_acquire);
-    }
-
-    void lock(void)
-    {
-        for (unsigned k = 0; lc_.test_and_set(std::memory_order_acquire); ++k)
-            detail_spin_lock::yield(k);
-    }
-
-    void unlock(void)
-    {
-        lc_.clear(std::memory_order_release);
-    }
-};
-
-} // namespace capo
diff --git a/3rdparty/capo/stopwatch.hpp b/3rdparty/capo/stopwatch.hpp
deleted file mode 100644
index 1e96dcb4..00000000
--- a/3rdparty/capo/stopwatch.hpp
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include <chrono>   // std::chrono
-#include <array>    // std::array
-#include <utility>  // std::pair, std::declval
-#include <cstddef>  // size_t
-
-namespace capo {
-
-////////////////////////////////////////////////////////////////
-/// Stopwatch - can store multiple sets of time
-////////////////////////////////////////////////////////////////
-
-template <size_t CountN = 1, class ClockT = std::chrono::steady_clock>
-class stopwatch : public ClockT
-{
-    using base_t = ClockT;
-
-    static_assert(CountN > 0, "The count must be greater than 0");
-
-public:
-    using rep        = typename ClockT::rep;
-    using period     = typename ClockT::period;
-    using duration   = typename ClockT::duration;
-    using time_point = typename ClockT::time_point;
-
-private:
-    using pair_t = std::pair<time_point/*start*/, time_point/*paused*/>;
-
-    std::array<pair_t, CountN> points_;
-    bool is_stopped_ = true;
-
-public:
-    stopwatch(bool start_watch = false)
-    {
-        if (start_watch) start();
-    }
-
-public:
-    bool is_stopped(void) const
-    {
-        return is_stopped_;
-    }
-
-    template <size_t N = 0>
-    bool is_paused(void) const
-    {
-        return (points_[N].second != points_[N].first);
-    }
-
-    template <size_t N = 0>
-    duration elapsed(void)
-    {
-        if (is_stopped())
-            return duration::zero();
-        else
-        if (is_paused<N>())
-            return (points_[N].second - points_[N].first);
-        else
-            return ClockT::now() - points_[N].first;
-    }
-
-    template <typename ToDur, size_t N = 0>
-    auto elapsed(void) -> decltype(std::declval<ToDur>().count())
-    {
-        return std::chrono::duration_cast<ToDur>(elapsed<N>()).count();
-    }
-
-    template <size_t N = 0>
-    void pause(void)
-    {
-        points_[N].second = ClockT::now();
-    }
-
-    template <size_t N = 0>
-    void restart(void)
-    {
-        points_[N].second = points_[N].first =
-            ClockT::now() - (points_[N].second - points_[N].first);
-    }
-
-    void start(void)
-    {
-        time_point now = ClockT::now();
-        for (auto& pt : points_)
-        {
-            pt.second = pt.first = now - (pt.second - pt.first);
-        }
-        is_stopped_ = false;
-    }
-
-    void stop(void)
-    {
-        for (auto& pt : points_)
-        {
-            pt.second = pt.first;
-        }
-        is_stopped_ = true;
-    }
-};
-
-} // namespace capo
diff --git a/3rdparty/capo/type_name.hpp b/3rdparty/capo/type_name.hpp
deleted file mode 100755
index aee30334..00000000
--- a/3rdparty/capo/type_name.hpp
+++ /dev/null
@@ -1,320 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-#include "capo/scope_guard.hpp"
-
-#include <typeinfo>     // typeid
-#include <sstream>      // std::ostringstream, std::string
-#include <type_traits>  // std::is_array
-
-#if defined(__GNUC__)
-#   include <cxxabi.h>  // abi::__cxa_demangle
-#endif/*__GNUC__*/
-
-namespace capo {
-namespace detail_type_name {
-
-////////////////////////////////////////////////////////////////
-/// Ready for output
-////////////////////////////////////////////////////////////////
-
-// Forward declarations
-template <typename T, bool IsBase = false>
-struct check;
-
-/*
-    Output state management
-*/
-
-class output
-{
-    bool is_compact_ = true;
-
-    template <typename T>
-    bool check_empty(const T&) { return false; }
-    bool check_empty(const char* val)
-    {
-        return (!val) || (val[0] == 0);
-    }
-
-    template <typename T>
-    void out(const T& val)
-    {
-        if (check_empty(val)) return;
-        if (!is_compact_) sr_ += " ";
-        std::ostringstream ss;
-        ss << val;
-        sr_ += ss.str();
-        is_compact_ = false;
-    }
-
-    std::string& sr_;
-
-public:
-    output(std::string& sr) : sr_(sr) {}
-
-    output& operator()(void) { return (*this); }
-
-    template <typename T1, typename... T>
-    output& operator()(const T1& val, const T&... args)
-    {
-        out(val);
-        return operator()(args...);
-    }
-
-    output& compact(void)
-    {
-        is_compact_ = true;
-        return (*this);
-    }
-};
-
-// ()
-
-template <bool>
-struct bracket
-{
-    output& out_;
-
-    bracket(output& out, const char* = nullptr) : out_(out)
-    { out_("(").compact(); }
-
-    ~bracket(void)
-    { out_.compact()(")"); }
-};
-
-template <>
-struct bracket<false>
-{
-    bracket(output& out, const char* str = nullptr)
-    { out(str); }
-};
-
-// [N]
-
-template <size_t N = 0>
-struct bound
-{
-    output& out_;
-
-    bound(output& out) : out_(out) {}
-    ~bound(void)
-    {
-        if (N == 0) out_("[]");
-        else        out_("[").compact()
-                        ( N ).compact()
-                        ("]");
-    }
-};
-
-// (P1, P2, ...)
-
-template <bool, typename... P>
-struct parameter;
-
-template <bool IsStart>
-struct parameter<IsStart>
-{
-    output& out_;
-
-    parameter(output& out) : out_(out) {}
-    ~parameter(void)
-    { bracket<IsStart> { out_ }; }
-};
-
-template <bool IsStart, typename P1, typename... P>
-struct parameter<IsStart, P1, P...>
-{
-    output& out_;
-
-    parameter(output& out) : out_(out) {}
-    ~parameter(void)
-    {
-        [this](bracket<IsStart>&&)
-        {
-            check<P1> { out_ };
-            parameter<false, P...> { out_.compact() };
-        } (bracket<IsStart> { out_, "," });
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Template specializations for checking
-////////////////////////////////////////////////////////////////
-
-/*
-    CV-qualifiers, references, pointers
-*/
-
-template <typename T, bool IsBase>
-struct check
-{
-    output out_;
-    check(const output& out) : out_(out)
-    {
-#   if defined(__GNUC__)
-        const char* typeid_name = typeid(T).name();
-        char* real_name = abi::__cxa_demangle(typeid_name, nullptr, nullptr, nullptr);
-        CAPO_SCOPE_GUARD_ = [real_name]
-        {
-            if (real_name) ::free(real_name);
-        };
-        out_(real_name ? real_name : typeid_name);
-#   else /*__GNUC__*/
-        out_(typeid(T).name());
-#   endif/*__GNUC__*/
-    }
-};
-
-#pragma push_macro("CAPO_CHECK_TYPE__")
-#undef  CAPO_CHECK_TYPE__
-#define CAPO_CHECK_TYPE__(OPT)                                 \
-    template <typename T, bool IsBase>                         \
-    struct check<T OPT, IsBase> : check<T, true>               \
-    {                                                          \
-        using base_t = check<T, true>;                         \
-        using base_t::out_;                                    \
-        check(const output& out) : base_t(out) { out_(#OPT); } \
-    };
-
-CAPO_CHECK_TYPE__(const)
-CAPO_CHECK_TYPE__(volatile)
-CAPO_CHECK_TYPE__(const volatile)
-CAPO_CHECK_TYPE__(&)
-CAPO_CHECK_TYPE__(&&)
-CAPO_CHECK_TYPE__(*)
-
-#pragma pop_macro("CAPO_CHECK_TYPE__")
-
-/*
-    Arrays
-*/
-
-#pragma push_macro("CAPO_CHECK_TYPE_ARRAY__")
-#pragma push_macro("CAPO_CHECK_TYPE_ARRAY_CV__")
-#pragma push_macro("CAPO_CHECK_TYPE_PLACEHOLDER__")
-
-#undef CAPO_CHECK_TYPE_ARRAY__
-#undef CAPO_CHECK_TYPE_ARRAY_CV__
-#undef CAPO_CHECK_TYPE_PLACEHOLDER__
-
-#define CAPO_CHECK_TYPE_ARRAY__(CV_OPT, BOUND_OPT, ...)                                    \
-    template <typename T, bool IsBase __VA_ARGS__>                                         \
-    struct check<T CV_OPT [BOUND_OPT], IsBase> : check<T CV_OPT, !std::is_array<T>::value> \
-    {                                                                                      \
-        using base_t = check<T CV_OPT, !std::is_array<T>::value>;                          \
-        using base_t::out_;                                                                \
-                                                                                           \
-        bound<BOUND_OPT> bound_   = out_;                                                  \
-        bracket<IsBase>  bracket_ = out_;                                                  \
-                                                                                           \
-        check(const output& out) : base_t(out) {}                                          \
-    };
-
-#define CAPO_CHECK_TYPE_ARRAY_CV__(BOUND_OPT, ...)               \
-    CAPO_CHECK_TYPE_ARRAY__(, BOUND_OPT, ,##__VA_ARGS__)         \
-    CAPO_CHECK_TYPE_ARRAY__(const, BOUND_OPT, ,##__VA_ARGS__)    \
-    CAPO_CHECK_TYPE_ARRAY__(volatile, BOUND_OPT, ,##__VA_ARGS__) \
-    CAPO_CHECK_TYPE_ARRAY__(const volatile, BOUND_OPT, ,##__VA_ARGS__)
-
-#define CAPO_CHECK_TYPE_PLACEHOLDER__
-
-CAPO_CHECK_TYPE_ARRAY_CV__(CAPO_CHECK_TYPE_PLACEHOLDER__)
-#if defined(__GNUC__)
-CAPO_CHECK_TYPE_ARRAY_CV__(0)
-#endif/*__GNUC__*/
-CAPO_CHECK_TYPE_ARRAY_CV__(N, size_t N)
-
-#pragma pop_macro("CAPO_CHECK_TYPE_PLACEHOLDER__")
-#pragma pop_macro("CAPO_CHECK_TYPE_ARRAY_CV__")
-#pragma pop_macro("CAPO_CHECK_TYPE_ARRAY__")
-
-/*
-    Functions
-*/
-
-template <typename T, bool IsBase, typename... P>
-struct check<T(P...), IsBase> : check<T, true>
-{
-    using base_t = check<T, true>;
-    using base_t::out_;
-
-    parameter<true, P...> parameter_ = out_;
-    bracket<IsBase>       bracket_   = out_;
-
-    check(const output& out) : base_t(out) {}
-};
-
-/*
-    Pointers to members
-*/
-
-template <typename T, bool IsBase, typename C>
-struct check<T C::*, IsBase> : check<T, true>
-{
-    using base_t = check<T, true>;
-    using base_t::out_;
-
-    check(const output& out) : base_t(out)
-    {
-        check<C> { out_ };
-        out_.compact()("::*");
-    }
-};
-
-/*
-    Pointers to member functions
-*/
-
-#pragma push_macro("CAPO_CHECK_TYPE_MEM_FUNC__")
-#undef  CAPO_CHECK_TYPE_MEM_FUNC__
-#define CAPO_CHECK_TYPE_MEM_FUNC__(...)                           \
-    template <typename T, bool IsBase, typename C, typename... P> \
-    struct check<T(C::*)(P...) __VA_ARGS__, IsBase>               \
-    {                                                             \
-        scope_guard<> at_destruct_cv_;                            \
-        check<T(P...), true> base_;                               \
-        output& out_ = base_.out_;                                \
-                                                                  \
-        check(const output& out)                                  \
-            : at_destruct_cv_([this]{ out_(#__VA_ARGS__); })      \
-            , base_(out)                                          \
-        {                                                         \
-            check<C> { out_ };                                    \
-            out_.compact()("::*");                                \
-        }                                                         \
-    };
-
-CAPO_CHECK_TYPE_MEM_FUNC__()
-CAPO_CHECK_TYPE_MEM_FUNC__(const)
-CAPO_CHECK_TYPE_MEM_FUNC__(volatile)
-CAPO_CHECK_TYPE_MEM_FUNC__(const volatile)
-
-#pragma pop_macro("CAPO_CHECK_TYPE_MEM_FUNC__")
-
-} // namespace detail_type_name
-
-////////////////////////////////////////////////////////////////
-/// Get the name of the given type
-////////////////////////////////////////////////////////////////
-
-/*
-    type_name<const volatile void *>()
-    -->
-    void const volatile *
-*/
-
-template <typename T>
-inline std::string type_name(void)
-{
-    std::string str;
-    detail_type_name::check<T> { str };
-    return str;
-}
-
-} // namespace capo
\ No newline at end of file
diff --git a/3rdparty/capo/unused.hpp b/3rdparty/capo/unused.hpp
deleted file mode 100755
index b79d7ef6..00000000
--- a/3rdparty/capo/unused.hpp
+++ /dev/null
@@ -1,23 +0,0 @@
-/*
-    The Capo Library
-    Code covered by the MIT License
-    Author: mutouyun (http://orzz.org)
-*/
-
-#pragma once
-
-////////////////////////////////////////////////////////////////
-
-#ifdef CAPO_UNUSED_
-#   error "CAPO_UNUSED_ has been defined."
-#endif
-
-#if defined(_MSC_VER)
-#   define CAPO_UNUSED_ __pragma(warning(suppress: 4100 4101 4189))
-#elif defined(__GNUC__)
-#   define CAPO_UNUSED_ __attribute__((__unused__))
-#else
-#   define CAPO_UNUSED_
-#endif
-
-////////////////////////////////////////////////////////////////
\ No newline at end of file
diff --git a/3rdparty/gperftools/libtcmalloc_minimal.so.4 b/3rdparty/gperftools/libtcmalloc_minimal.so.4
deleted file mode 100644
index 74cc4602..00000000
--- a/3rdparty/gperftools/libtcmalloc_minimal.so.4
+++ /dev/null
@@ -1 +0,0 @@
-libtcmalloc_minimal.so
\ No newline at end of file
diff --git a/3rdparty/gperftools/libtcmalloc_minimal.so.4.5.3 b/3rdparty/gperftools/libtcmalloc_minimal.so.4.5.3
deleted file mode 100644
index 74cc4602..00000000
--- a/3rdparty/gperftools/libtcmalloc_minimal.so.4.5.3
+++ /dev/null
@@ -1 +0,0 @@
-libtcmalloc_minimal.so
\ No newline at end of file
diff --git a/3rdparty/gperftools/tcmalloc.h b/3rdparty/gperftools/tcmalloc.h
deleted file mode 100644
index 79350817..00000000
--- a/3rdparty/gperftools/tcmalloc.h
+++ /dev/null
@@ -1,163 +0,0 @@
-// -*- Mode: C; c-basic-offset: 2; indent-tabs-mode: nil -*-
-/* Copyright (c) 2003, Google Inc.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * ---
- * Author: Sanjay Ghemawat <opensource@google.com>
- *         .h file by Craig Silverstein <opensource@google.com>
- */
-
-#ifndef TCMALLOC_TCMALLOC_H_
-#define TCMALLOC_TCMALLOC_H_
-
-#include <stddef.h>                     /* for size_t */
-#ifdef __cplusplus
-#include <new>                          /* for std::nothrow_t, std::align_val_t */
-#endif
-
-/* Define the version number so folks can check against it */
-#define TC_VERSION_MAJOR  2
-#define TC_VERSION_MINOR  7
-#define TC_VERSION_PATCH  ""
-#define TC_VERSION_STRING "gperftools 2.7"
-
-/* For struct mallinfo, if it's defined. */
-#if 1
-# include <malloc.h>
-#endif
-
-#ifndef PERFTOOLS_NOTHROW
-
-#if __cplusplus >= 201103L
-#define PERFTOOLS_NOTHROW noexcept
-#elif defined(__cplusplus)
-#define PERFTOOLS_NOTHROW throw()
-#else
-# ifdef __GNUC__
-#  define PERFTOOLS_NOTHROW __attribute__((__nothrow__))
-# else
-#  define PERFTOOLS_NOTHROW
-# endif
-#endif
-
-#endif
-
-#ifndef PERFTOOLS_DLL_DECL
-# ifdef _WIN32
-#   define PERFTOOLS_DLL_DECL  __declspec(dllimport)
-# else
-#   define PERFTOOLS_DLL_DECL
-# endif
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-  /*
-   * Returns a human-readable version string.  If major, minor,
-   * and/or patch are not NULL, they are set to the major version,
-   * minor version, and patch-code (a string, usually "").
-   */
-  PERFTOOLS_DLL_DECL const char* tc_version(int* major, int* minor,
-                                            const char** patch) PERFTOOLS_NOTHROW;
-
-  PERFTOOLS_DLL_DECL void* tc_malloc(size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_malloc_skip_new_handler(size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_free(void* ptr) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_free_sized(void *ptr, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_realloc(void* ptr, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_calloc(size_t nmemb, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_cfree(void* ptr) PERFTOOLS_NOTHROW;
-
-  PERFTOOLS_DLL_DECL void* tc_memalign(size_t __alignment,
-                                       size_t __size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL int tc_posix_memalign(void** ptr,
-                                           size_t align, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_valloc(size_t __size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_pvalloc(size_t __size) PERFTOOLS_NOTHROW;
-
-  PERFTOOLS_DLL_DECL void tc_malloc_stats(void) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL int tc_mallopt(int cmd, int value) PERFTOOLS_NOTHROW;
-#if 1
-  PERFTOOLS_DLL_DECL struct mallinfo tc_mallinfo(void) PERFTOOLS_NOTHROW;
-#endif
-
-  /*
-   * This is an alias for MallocExtension::instance()->GetAllocatedSize().
-   * It is equivalent to
-   *    OS X: malloc_size()
-   *    glibc: malloc_usable_size()
-   *    Windows: _msize()
-   */
-  PERFTOOLS_DLL_DECL size_t tc_malloc_size(void* ptr) PERFTOOLS_NOTHROW;
-
-#ifdef __cplusplus
-  PERFTOOLS_DLL_DECL int tc_set_new_mode(int flag) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_new(size_t size);
-  PERFTOOLS_DLL_DECL void* tc_new_nothrow(size_t size,
-                                          const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete(void* p) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_sized(void* p, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_nothrow(void* p,
-                                            const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_newarray(size_t size);
-  PERFTOOLS_DLL_DECL void* tc_newarray_nothrow(size_t size,
-                                               const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray(void* p) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_sized(void* p, size_t size) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_nothrow(void* p,
-                                                 const std::nothrow_t&) PERFTOOLS_NOTHROW;
-
-#if 1 && __cplusplus >= 201703L
-  PERFTOOLS_DLL_DECL void* tc_new_aligned(size_t size, std::align_val_t al);
-  PERFTOOLS_DLL_DECL void* tc_new_aligned_nothrow(size_t size, std::align_val_t al,
-                                          const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_aligned(void* p, std::align_val_t al) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_sized_aligned(void* p, size_t size, std::align_val_t al) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_delete_aligned_nothrow(void* p, std::align_val_t al,
-                                            const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void* tc_newarray_aligned(size_t size, std::align_val_t al);
-  PERFTOOLS_DLL_DECL void* tc_newarray_aligned_nothrow(size_t size, std::align_val_t al,
-                                               const std::nothrow_t&) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_aligned(void* p, std::align_val_t al) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_sized_aligned(void* p, size_t size, std::align_val_t al) PERFTOOLS_NOTHROW;
-  PERFTOOLS_DLL_DECL void tc_deletearray_aligned_nothrow(void* p, std::align_val_t al,
-                                                 const std::nothrow_t&) PERFTOOLS_NOTHROW;
-#endif
-}
-#endif
-
-/* We're only un-defining for public */
-#if !defined(GPERFTOOLS_CONFIG_H_)
-
-#undef PERFTOOLS_NOTHROW
-
-#endif /* GPERFTOOLS_CONFIG_H_ */
-
-#endif  /* #ifndef TCMALLOC_TCMALLOC_H_ */
diff --git a/3rdparty/gtest/CMakeLists.txt b/3rdparty/gtest/CMakeLists.txt
deleted file mode 100644
index 97af6052..00000000
--- a/3rdparty/gtest/CMakeLists.txt
+++ /dev/null
@@ -1,332 +0,0 @@
-########################################################################
-# Note: CMake support is community-based. The maintainers do not use CMake
-# internally.
-#
-# CMake build script for Google Test.
-#
-# To run the tests for Google Test itself on Linux, use 'make test' or
-# ctest.  You can select which tests to run using 'ctest -R regex'.
-# For more options, run 'ctest --help'.
-
-if (POLICY CMP0077)
-  cmake_policy(SET CMP0077 NEW)
-endif (POLICY CMP0077)
-
-# When other libraries are using a shared version of runtime libraries,
-# Google Test also has to use one.
-option(
-  gtest_force_shared_crt
-  "Use shared (DLL) run-time lib even when Google Test is built as static lib."
-  OFF)
-
-option(gtest_build_tests "Build all of gtest's own tests." OFF)
-
-option(gtest_build_samples "Build gtest's sample programs." OFF)
-
-option(gtest_disable_pthreads "Disable uses of pthreads in gtest." OFF)
-
-option(
-  gtest_hide_internal_symbols
-  "Build gtest with internal symbols hidden in shared libraries."
-  OFF)
-
-# Defines pre_project_set_up_hermetic_build() and set_up_hermetic_build().
-include(cmake/hermetic_build.cmake OPTIONAL)
-
-if (COMMAND pre_project_set_up_hermetic_build)
-  pre_project_set_up_hermetic_build()
-endif()
-
-########################################################################
-#
-# Project-wide settings
-
-# Name of the project.
-#
-# CMake files in this project can refer to the root source directory
-# as ${gtest_SOURCE_DIR} and to the root binary directory as
-# ${gtest_BINARY_DIR}.
-# Language "C" is required for find_package(Threads).
-
-# Project version:
-
-if (CMAKE_VERSION VERSION_LESS 3.0)
-  project(gtest CXX C)
-  set(PROJECT_VERSION ${GOOGLETEST_VERSION})
-else()
-  cmake_policy(SET CMP0048 NEW)
-  project(gtest VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
-endif()
-cmake_minimum_required(VERSION 2.6.4)
-
-if (POLICY CMP0063) # Visibility
-  cmake_policy(SET CMP0063 NEW)
-endif (POLICY CMP0063)
-
-if (COMMAND set_up_hermetic_build)
-  set_up_hermetic_build()
-endif()
-
-# These commands only run if this is the main project
-if(CMAKE_PROJECT_NAME STREQUAL "gtest" OR CMAKE_PROJECT_NAME STREQUAL "googletest-distribution")
-
-  # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to
-  # make it prominent in the GUI.
-  option(BUILD_SHARED_LIBS "Build shared libraries (DLLs)." OFF)
-
-else()
-
-  mark_as_advanced(
-    gtest_force_shared_crt
-    gtest_build_tests
-    gtest_build_samples
-    gtest_disable_pthreads
-    gtest_hide_internal_symbols)
-
-endif()
-
-
-if (gtest_hide_internal_symbols)
-  set(CMAKE_CXX_VISIBILITY_PRESET hidden)
-  set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
-endif()
-
-# Define helper functions and macros used by Google Test.
-include(cmake/internal_utils.cmake)
-
-config_compiler_and_linker()  # Defined in internal_utils.cmake.
-
-# Create the CMake package file descriptors.
-if (INSTALL_GTEST)
-  include(CMakePackageConfigHelpers)
-  set(cmake_package_name GTest)
-  set(targets_export_name ${cmake_package_name}Targets CACHE INTERNAL "")
-  set(generated_dir "${CMAKE_CURRENT_BINARY_DIR}/generated" CACHE INTERNAL "")
-  set(cmake_files_install_dir "${CMAKE_INSTALL_LIBDIR}/cmake/${cmake_package_name}")
-  set(version_file "${generated_dir}/${cmake_package_name}ConfigVersion.cmake")
-  write_basic_package_version_file(${version_file} VERSION ${GOOGLETEST_VERSION} COMPATIBILITY AnyNewerVersion)
-  install(EXPORT ${targets_export_name}
-    NAMESPACE ${cmake_package_name}::
-    DESTINATION ${cmake_files_install_dir})
-  set(config_file "${generated_dir}/${cmake_package_name}Config.cmake")
-  configure_package_config_file("${gtest_SOURCE_DIR}/cmake/Config.cmake.in"
-    "${config_file}" INSTALL_DESTINATION ${cmake_files_install_dir})
-  install(FILES ${version_file} ${config_file}
-    DESTINATION ${cmake_files_install_dir})
-endif()
-
-# Where Google Test's .h files can be found.
-set(gtest_build_include_dirs
-  "${gtest_SOURCE_DIR}/include"
-  "${gtest_SOURCE_DIR}")
-include_directories(${gtest_build_include_dirs})
-
-########################################################################
-#
-# Defines the gtest & gtest_main libraries.  User tests should link
-# with one of them.
-
-# Google Test libraries.  We build them using more strict warnings than what
-# are used for other targets, to ensure that gtest can be compiled by a user
-# aggressive about warnings.
-cxx_library(gtest "${cxx_strict}" src/gtest-all.cc)
-cxx_library(gtest_main "${cxx_strict}" src/gtest_main.cc)
-# If the CMake version supports it, attach header directory information
-# to the targets for when we are part of a parent build (ie being pulled
-# in via add_subdirectory() rather than being a standalone build).
-if (DEFINED CMAKE_VERSION AND NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
-  target_include_directories(gtest SYSTEM INTERFACE
-    "$<BUILD_INTERFACE:${gtest_build_include_dirs}>"
-    "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>")
-  target_include_directories(gtest_main SYSTEM INTERFACE
-    "$<BUILD_INTERFACE:${gtest_build_include_dirs}>"
-    "$<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>")
-endif()
-target_link_libraries(gtest_main PUBLIC gtest)
-
-########################################################################
-#
-# Install rules
-install_project(gtest gtest_main)
-
-########################################################################
-#
-# Samples on how to link user tests with gtest or gtest_main.
-#
-# They are not built by default.  To build them, set the
-# gtest_build_samples option to ON.  You can do it by running ccmake
-# or specifying the -Dgtest_build_samples=ON flag when running cmake.
-
-if (gtest_build_samples)
-  cxx_executable(sample1_unittest samples gtest_main samples/sample1.cc)
-  cxx_executable(sample2_unittest samples gtest_main samples/sample2.cc)
-  cxx_executable(sample3_unittest samples gtest_main)
-  cxx_executable(sample4_unittest samples gtest_main samples/sample4.cc)
-  cxx_executable(sample5_unittest samples gtest_main samples/sample1.cc)
-  cxx_executable(sample6_unittest samples gtest_main)
-  cxx_executable(sample7_unittest samples gtest_main)
-  cxx_executable(sample8_unittest samples gtest_main)
-  cxx_executable(sample9_unittest samples gtest)
-  cxx_executable(sample10_unittest samples gtest)
-endif()
-
-########################################################################
-#
-# Google Test's own tests.
-#
-# You can skip this section if you aren't interested in testing
-# Google Test itself.
-#
-# The tests are not built by default.  To build them, set the
-# gtest_build_tests option to ON.  You can do it by running ccmake
-# or specifying the -Dgtest_build_tests=ON flag when running cmake.
-
-if (gtest_build_tests)
-  # This must be set in the root directory for the tests to be run by
-  # 'make test' or ctest.
-  enable_testing()
-
-  if (WIN32)
-    file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/RunTest.ps1"
-         CONTENT
-"$project_bin = \"${CMAKE_BINARY_DIR}/bin/$<CONFIG>\"
-$env:Path = \"$project_bin;$env:Path\"
-& $args")
-  elseif (MINGW OR CYGWIN)
-    file(GENERATE OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/RunTest.ps1"
-         CONTENT
-"$project_bin = (cygpath --windows ${CMAKE_BINARY_DIR}/bin)
-$env:Path = \"$project_bin;$env:Path\"
-& $args")
-  endif()
-
-  ############################################################
-  # C++ tests built with standard compiler flags.
-
-  cxx_test(googletest-death-test-test gtest_main)
-  cxx_test(gtest_environment_test gtest)
-  cxx_test(googletest-filepath-test gtest_main)
-  cxx_test(googletest-listener-test gtest_main)
-  cxx_test(gtest_main_unittest gtest_main)
-  cxx_test(googletest-message-test gtest_main)
-  cxx_test(gtest_no_test_unittest gtest)
-  cxx_test(googletest-options-test gtest_main)
-  cxx_test(googletest-param-test-test gtest
-    test/googletest-param-test2-test.cc)
-  cxx_test(googletest-port-test gtest_main)
-  cxx_test(gtest_pred_impl_unittest gtest_main)
-  cxx_test(gtest_premature_exit_test gtest
-    test/gtest_premature_exit_test.cc)
-  cxx_test(googletest-printers-test gtest_main)
-  cxx_test(gtest_prod_test gtest_main
-    test/production.cc)
-  cxx_test(gtest_repeat_test gtest)
-  cxx_test(gtest_sole_header_test gtest_main)
-  cxx_test(gtest_stress_test gtest)
-  cxx_test(googletest-test-part-test gtest_main)
-  cxx_test(gtest_throw_on_failure_ex_test gtest)
-  cxx_test(gtest-typed-test_test gtest_main
-    test/gtest-typed-test2_test.cc)
-  cxx_test(gtest_unittest gtest_main)
-  cxx_test(gtest-unittest-api_test gtest)
-  cxx_test(gtest_skip_in_environment_setup_test gtest_main)
-  cxx_test(gtest_skip_test gtest_main)
-
-  ############################################################
-  # C++ tests built with non-standard compiler flags.
-
-  # MSVC 7.1 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)
-    cxx_library(gtest_no_exception "${cxx_no_exception}"
-      src/gtest-all.cc)
-    cxx_library(gtest_main_no_exception "${cxx_no_exception}"
-      src/gtest-all.cc src/gtest_main.cc)
-  endif()
-  cxx_library(gtest_main_no_rtti "${cxx_no_rtti}"
-    src/gtest-all.cc src/gtest_main.cc)
-
-  cxx_test_with_flags(gtest-death-test_ex_nocatch_test
-    "${cxx_exception} -DGTEST_ENABLE_CATCH_EXCEPTIONS_=0"
-    gtest test/googletest-death-test_ex_test.cc)
-  cxx_test_with_flags(gtest-death-test_ex_catch_test
-    "${cxx_exception} -DGTEST_ENABLE_CATCH_EXCEPTIONS_=1"
-    gtest test/googletest-death-test_ex_test.cc)
-
-  cxx_test_with_flags(gtest_no_rtti_unittest "${cxx_no_rtti}"
-    gtest_main_no_rtti test/gtest_unittest.cc)
-
-  cxx_shared_library(gtest_dll "${cxx_default}"
-    src/gtest-all.cc src/gtest_main.cc)
-
-  cxx_executable_with_flags(gtest_dll_test_ "${cxx_default}"
-    gtest_dll test/gtest_all_test.cc)
-  set_target_properties(gtest_dll_test_
-                        PROPERTIES
-                        COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-
-  ############################################################
-  # Python tests.
-
-  cxx_executable(googletest-break-on-failure-unittest_ test gtest)
-  py_test(googletest-break-on-failure-unittest)
-
-  py_test(gtest_skip_environment_check_output_test)
-
-  # Visual Studio .NET 2003 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)  # 1310 is Visual Studio .NET 2003
-    cxx_executable_with_flags(
-      googletest-catch-exceptions-no-ex-test_
-      "${cxx_no_exception}"
-      gtest_main_no_exception
-      test/googletest-catch-exceptions-test_.cc)
-  endif()
-
-  cxx_executable_with_flags(
-    googletest-catch-exceptions-ex-test_
-    "${cxx_exception}"
-    gtest_main
-    test/googletest-catch-exceptions-test_.cc)
-  py_test(googletest-catch-exceptions-test)
-
-  cxx_executable(googletest-color-test_ test gtest)
-  py_test(googletest-color-test)
-
-  cxx_executable(googletest-env-var-test_ test gtest)
-  py_test(googletest-env-var-test)
-
-  cxx_executable(googletest-filter-unittest_ test gtest)
-  py_test(googletest-filter-unittest)
-
-  cxx_executable(gtest_help_test_ test gtest_main)
-  py_test(gtest_help_test)
-
-  cxx_executable(googletest-list-tests-unittest_ test gtest)
-  py_test(googletest-list-tests-unittest)
-
-  cxx_executable(googletest-output-test_ test gtest)
-  py_test(googletest-output-test --no_stacktrace_support)
-
-  cxx_executable(googletest-shuffle-test_ test gtest)
-  py_test(googletest-shuffle-test)
-
-  # MSVC 7.1 does not support STL with exceptions disabled.
-  if (NOT MSVC OR MSVC_VERSION GREATER 1310)
-    cxx_executable(googletest-throw-on-failure-test_ test gtest_no_exception)
-    set_target_properties(googletest-throw-on-failure-test_
-      PROPERTIES
-      COMPILE_FLAGS "${cxx_no_exception}")
-    py_test(googletest-throw-on-failure-test)
-  endif()
-
-  cxx_executable(googletest-uninitialized-test_ test gtest)
-  py_test(googletest-uninitialized-test)
-
-  cxx_executable(gtest_xml_outfile1_test_ test gtest_main)
-  cxx_executable(gtest_xml_outfile2_test_ test gtest_main)
-  py_test(gtest_xml_outfiles_test)
-  py_test(googletest-json-outfiles-test)
-
-  cxx_executable(gtest_xml_output_unittest_ test gtest)
-  py_test(gtest_xml_output_unittest --no_stacktrace_support)
-  py_test(googletest-json-output-unittest --no_stacktrace_support)
-endif()
diff --git a/3rdparty/gtest/CONTRIBUTORS b/3rdparty/gtest/CONTRIBUTORS
deleted file mode 100644
index feae2fc0..00000000
--- a/3rdparty/gtest/CONTRIBUTORS
+++ /dev/null
@@ -1,37 +0,0 @@
-# This file contains a list of people who've made non-trivial
-# contribution to the Google C++ Testing Framework project.  People
-# who commit code to the project are encouraged to add their names
-# here.  Please keep the list sorted by first names.
-
-Ajay Joshi <jaj@google.com>
-Balázs Dán <balazs.dan@gmail.com>
-Bharat Mediratta <bharat@menalto.com>
-Chandler Carruth <chandlerc@google.com>
-Chris Prince <cprince@google.com>
-Chris Taylor <taylorc@google.com>
-Dan Egnor <egnor@google.com>
-Eric Roman <eroman@chromium.org>
-Hady Zalek <hady.zalek@gmail.com>
-Jeffrey Yasskin <jyasskin@google.com>
-Jói Sigurðsson <joi@google.com>
-Keir Mierle <mierle@gmail.com>
-Keith Ray <keith.ray@gmail.com>
-Kenton Varda <kenton@google.com>
-Manuel Klimek <klimek@google.com>
-Markus Heule <markus.heule@gmail.com>
-Mika Raento <mikie@iki.fi>
-Miklós Fazekas <mfazekas@szemafor.com>
-Pasi Valminen <pasi.valminen@gmail.com>
-Patrick Hanna <phanna@google.com>
-Patrick Riley <pfr@google.com>
-Peter Kaminski <piotrk@google.com>
-Preston Jackson <preston.a.jackson@gmail.com>
-Rainer Klaffenboeck <rainer.klaffenboeck@dynatrace.com>
-Russ Cox <rsc@google.com>
-Russ Rufer <russ@pentad.com>
-Sean Mcafee <eefacm@gmail.com>
-Sigurður Ásgeirsson <siggi@google.com>
-Tracy Bialik <tracy@pentad.com>
-Vadim Berman <vadimb@google.com>
-Vlad Losev <vladl@google.com>
-Zhanyong Wan <wan@google.com>
diff --git a/3rdparty/gtest/LICENSE b/3rdparty/gtest/LICENSE
deleted file mode 100644
index 1941a11f..00000000
--- a/3rdparty/gtest/LICENSE
+++ /dev/null
@@ -1,28 +0,0 @@
-Copyright 2008, Google Inc.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-    * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-    * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/3rdparty/gtest/README.md b/3rdparty/gtest/README.md
deleted file mode 100644
index 766ddc1e..00000000
--- a/3rdparty/gtest/README.md
+++ /dev/null
@@ -1,244 +0,0 @@
-### Generic Build Instructions
-
-#### Setup
-
-To build Google Test and your tests that use it, you need to tell your build
-system where to find its headers and source files. The exact way to do it
-depends on which build system you use, and is usually straightforward.
-
-### Build with CMake
-
-Google Test comes with a CMake build script (
-[CMakeLists.txt](https://github.com/google/googletest/blob/master/CMakeLists.txt))
-that can be used on a wide range of platforms ("C" stands for cross-platform.).
-If you don't have CMake installed already, you can download it for free from
-<http://www.cmake.org/>.
-
-CMake works by generating native makefiles or build projects that can be used in
-the compiler environment of your choice. You can either build Google Test as a
-standalone project or it can be incorporated into an existing CMake build for
-another project.
-
-#### Standalone CMake Project
-
-When building Google Test as a standalone project, the typical workflow starts
-with:
-
-    mkdir mybuild       # Create a directory to hold the build output.
-    cd mybuild
-    cmake ${GTEST_DIR}  # Generate native build scripts.
-
-If you want to build Google Test's samples, you should replace the last command
-with
-
-    cmake -Dgtest_build_samples=ON ${GTEST_DIR}
-
-If you are on a \*nix system, you should now see a Makefile in the current
-directory. Just type 'make' to build gtest.
-
-If you use Windows and have Visual Studio installed, a `gtest.sln` file and
-several `.vcproj` files will be created. You can then build them using Visual
-Studio.
-
-On Mac OS X with Xcode installed, a `.xcodeproj` file will be generated.
-
-#### Incorporating Into An Existing CMake Project
-
-If you want to use gtest in a project which already uses CMake, then a more
-robust and flexible approach is to build gtest as part of that project directly.
-This is done by making the GoogleTest source code available to the main build
-and adding it using CMake's `add_subdirectory()` command. This has the
-significant advantage that the same compiler and linker settings are used
-between gtest and the rest of your project, so issues associated with using
-incompatible libraries (eg debug/release), etc. are avoided. This is
-particularly useful on Windows. Making GoogleTest's source code available to the
-main build can be done a few different ways:
-
-*   Download the GoogleTest source code manually and place it at a known
-    location. This is the least flexible approach and can make it more difficult
-    to use with continuous integration systems, etc.
-*   Embed the GoogleTest source code as a direct copy in the main project's
-    source tree. This is often the simplest approach, but is also the hardest to
-    keep up to date. Some organizations may not permit this method.
-*   Add GoogleTest as a git submodule or equivalent. This may not always be
-    possible or appropriate. Git submodules, for example, have their own set of
-    advantages and drawbacks.
-*   Use CMake to download GoogleTest as part of the build's configure step. This
-    is just a little more complex, but doesn't have the limitations of the other
-    methods.
-
-The last of the above methods is implemented with a small piece of CMake code in
-a separate file (e.g. `CMakeLists.txt.in`) which is copied to the build area and
-then invoked as a sub-build _during the CMake stage_. That directory is then
-pulled into the main build with `add_subdirectory()`. For example:
-
-New file `CMakeLists.txt.in`:
-
-```cmake
-cmake_minimum_required(VERSION 2.8.2)
-
-project(googletest-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(googletest
-  GIT_REPOSITORY    https://github.com/google/googletest.git
-  GIT_TAG           master
-  SOURCE_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-src"
-  BINARY_DIR        "${CMAKE_CURRENT_BINARY_DIR}/googletest-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)
-```
-
-Existing build's `CMakeLists.txt`:
-
-```cmake
-# Download and unpack googletest at configure time
-configure_file(CMakeLists.txt.in googletest-download/CMakeLists.txt)
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
-if(result)
-  message(FATAL_ERROR "CMake step for googletest failed: ${result}")
-endif()
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-  RESULT_VARIABLE result
-  WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/googletest-download )
-if(result)
-  message(FATAL_ERROR "Build step for googletest failed: ${result}")
-endif()
-
-# Prevent overriding the parent project's compiler/linker
-# settings on Windows
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-
-# Add googletest directly to our build. This defines
-# the gtest and gtest_main targets.
-add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/googletest-src
-                 ${CMAKE_CURRENT_BINARY_DIR}/googletest-build
-                 EXCLUDE_FROM_ALL)
-
-# The gtest/gtest_main targets carry header search path
-# dependencies automatically when using CMake 2.8.11 or
-# later. Otherwise we have to add them here ourselves.
-if (CMAKE_VERSION VERSION_LESS 2.8.11)
-  include_directories("${gtest_SOURCE_DIR}/include")
-endif()
-
-# Now simply link against gtest or gtest_main as needed. Eg
-add_executable(example example.cpp)
-target_link_libraries(example gtest_main)
-add_test(NAME example_test COMMAND example)
-```
-
-Note that this approach requires CMake 2.8.2 or later due to its use of the
-`ExternalProject_Add()` command. The above technique is discussed in more detail
-in [this separate article](http://crascit.com/2015/07/25/cmake-gtest/) which
-also contains a link to a fully generalized implementation of the technique.
-
-##### Visual Studio Dynamic vs Static Runtimes
-
-By default, new Visual Studio projects link the C runtimes dynamically but
-Google Test links them statically. This will generate an error that looks
-something like the following: gtest.lib(gtest-all.obj) : error LNK2038: mismatch
-detected for 'RuntimeLibrary': value 'MTd_StaticDebug' doesn't match value
-'MDd_DynamicDebug' in main.obj
-
-Google Test already has a CMake option for this: `gtest_force_shared_crt`
-
-Enabling this option will make gtest link the runtimes dynamically too, and
-match the project in which it is included.
-
-#### C++ Standard Version
-
-An environment that supports C++11 is required in order to successfully build
-Google Test. One way to ensure this is to specify the standard in the top-level
-project, for example by using the `set(CMAKE_CXX_STANDARD 11)` command. If this
-is not feasible, for example in a C project using Google Test for validation,
-then it can be specified by adding it to the options for cmake via the
-`DCMAKE_CXX_FLAGS` option.
-
-### Tweaking Google Test
-
-Google Test can be used in diverse environments. The default configuration may
-not work (or may not work well) out of the box in some environments. However,
-you can easily tweak Google Test by defining control macros on the compiler
-command line. Generally, these macros are named like `GTEST_XYZ` and you define
-them to either 1 or 0 to enable or disable a certain feature.
-
-We list the most frequently used macros below. For a complete list, see file
-[include/gtest/internal/gtest-port.h](https://github.com/google/googletest/blob/master/googletest/include/gtest/internal/gtest-port.h).
-
-### Multi-threaded Tests
-
-Google Test is thread-safe where the pthread library is available. After
-`#include "gtest/gtest.h"`, you can check the
-`GTEST_IS_THREADSAFE` macro to see whether this is the case (yes if the macro is
-`#defined` to 1, no if it's undefined.).
-
-If Google Test doesn't correctly detect whether pthread is available in your
-environment, you can force it with
-
-    -DGTEST_HAS_PTHREAD=1
-
-or
-
-    -DGTEST_HAS_PTHREAD=0
-
-When Google Test uses pthread, you may need to add flags to your compiler and/or
-linker to select the pthread library, or you'll get link errors. If you use the
-CMake script or the deprecated Autotools script, this is taken care of for you.
-If you use your own build script, you'll need to read your compiler and linker's
-manual to figure out what flags to add.
-
-### As a Shared Library (DLL)
-
-Google Test is compact, so most users can build and link it as a static library
-for the simplicity. You can choose to use Google Test as a shared library (known
-as a DLL on Windows) if you prefer.
-
-To compile *gtest* as a shared library, add
-
-    -DGTEST_CREATE_SHARED_LIBRARY=1
-
-to the compiler flags. You'll also need to tell the linker to produce a shared
-library instead - consult your linker's manual for how to do it.
-
-To compile your *tests* that use the gtest shared library, add
-
-    -DGTEST_LINKED_AS_SHARED_LIBRARY=1
-
-to the compiler flags.
-
-Note: while the above steps aren't technically necessary today when using some
-compilers (e.g. GCC), they may become necessary in the future, if we decide to
-improve the speed of loading the library (see
-<http://gcc.gnu.org/wiki/Visibility> for details). Therefore you are recommended
-to always add the above flags when using Google Test as a shared library.
-Otherwise a future release of Google Test may break your build script.
-
-### Avoiding Macro Name Clashes
-
-In C++, macros don't obey namespaces. Therefore two libraries that both define a
-macro of the same name will clash if you `#include` both definitions. In case a
-Google Test macro clashes with another library, you can force Google Test to
-rename its macro to avoid the conflict.
-
-Specifically, if both Google Test and some other code define macro FOO, you can
-add
-
-    -DGTEST_DONT_DEFINE_FOO=1
-
-to the compiler flags to tell Google Test to change the macro's name from `FOO`
-to `GTEST_FOO`. Currently `FOO` can be `FAIL`, `SUCCEED`, or `TEST`. For
-example, with `-DGTEST_DONT_DEFINE_TEST=1`, you'll need to write
-
-    GTEST_TEST(SomeTest, DoesThis) { ... }
-
-instead of
-
-    TEST(SomeTest, DoesThis) { ... }
-
-in order to define a test.
diff --git a/3rdparty/gtest/cmake/Config.cmake.in b/3rdparty/gtest/cmake/Config.cmake.in
deleted file mode 100644
index 12be4498..00000000
--- a/3rdparty/gtest/cmake/Config.cmake.in
+++ /dev/null
@@ -1,9 +0,0 @@
-@PACKAGE_INIT@
-include(CMakeFindDependencyMacro)
-if (@GTEST_HAS_PTHREAD@)
-  set(THREADS_PREFER_PTHREAD_FLAG @THREADS_PREFER_PTHREAD_FLAG@)
-  find_dependency(Threads)
-endif()
-
-include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
-check_required_components("@project_name@")
diff --git a/3rdparty/gtest/cmake/gtest.pc.in b/3rdparty/gtest/cmake/gtest.pc.in
deleted file mode 100644
index 9aae29e2..00000000
--- a/3rdparty/gtest/cmake/gtest.pc.in
+++ /dev/null
@@ -1,10 +0,0 @@
-prefix=${pcfiledir}/../..
-libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
-
-Name: gtest
-Description: GoogleTest (without main() function)
-Version: @PROJECT_VERSION@
-URL: https://github.com/google/googletest
-Libs: -L${libdir} -lgtest @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @GTEST_HAS_PTHREAD_MACRO@ @CMAKE_THREAD_LIBS_INIT@
diff --git a/3rdparty/gtest/cmake/gtest_main.pc.in b/3rdparty/gtest/cmake/gtest_main.pc.in
deleted file mode 100644
index 915f2973..00000000
--- a/3rdparty/gtest/cmake/gtest_main.pc.in
+++ /dev/null
@@ -1,11 +0,0 @@
-prefix=${pcfiledir}/../..
-libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
-includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
-
-Name: gtest_main
-Description: GoogleTest (with main() function)
-Version: @PROJECT_VERSION@
-URL: https://github.com/google/googletest
-Requires: gtest
-Libs: -L${libdir} -lgtest_main @CMAKE_THREAD_LIBS_INIT@
-Cflags: -I${includedir} @GTEST_HAS_PTHREAD_MACRO@ @CMAKE_THREAD_LIBS_INIT@
diff --git a/3rdparty/gtest/cmake/internal_utils.cmake b/3rdparty/gtest/cmake/internal_utils.cmake
deleted file mode 100644
index 2f70f0b0..00000000
--- a/3rdparty/gtest/cmake/internal_utils.cmake
+++ /dev/null
@@ -1,358 +0,0 @@
-# Defines functions and macros useful for building Google Test and
-# Google Mock.
-#
-# Note:
-#
-# - This file will be run twice when building Google Mock (once via
-#   Google Test's CMakeLists.txt, and once via Google Mock's).
-#   Therefore it shouldn't have any side effects other than defining
-#   the functions and macros.
-#
-# - The functions/macros defined in this file may depend on Google
-#   Test and Google Mock's option() definitions, and thus must be
-#   called *after* the options have been defined.
-
-if (POLICY CMP0054)
-  cmake_policy(SET CMP0054 NEW)
-endif (POLICY CMP0054)
-
-# Tweaks CMake's default compiler/linker settings to suit Google Test's needs.
-#
-# This must be a macro(), as inside a function string() can only
-# update variables in the function scope.
-macro(fix_default_compiler_settings_)
-  if (MSVC)
-    # For MSVC, CMake sets certain flags to defaults we want to override.
-    # This replacement code is taken from sample in the CMake Wiki at
-    # https://gitlab.kitware.com/cmake/community/wikis/FAQ#dynamic-replace.
-    foreach (flag_var
-             CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
-             CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO
-             CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
-             CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
-      if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt)
-        # When Google Test is built as a shared library, it should also use
-        # shared runtime libraries.  Otherwise, it may end up with multiple
-        # copies of runtime library data in different modules, resulting in
-        # hard-to-find crashes. When it is built as a static library, it is
-        # preferable to use CRT as static libraries, as we don't have to rely
-        # on CRT DLLs being available. CMake always defaults to using shared
-        # CRT libraries, so we override that default here.
-        string(REPLACE "/MD" "-MT" ${flag_var} "${${flag_var}}")
-      endif()
-
-      # We prefer more strict warning checking for building Google Test.
-      # Replaces /W3 with /W4 in defaults.
-      string(REPLACE "/W3" "/W4" ${flag_var} "${${flag_var}}")
-
-      # Prevent D9025 warning for targets that have exception handling
-      # turned off (/EHs-c- flag). Where required, exceptions are explicitly
-      # re-enabled using the cxx_exception_flags variable.
-      string(REPLACE "/EHsc" "" ${flag_var} "${${flag_var}}")
-    endforeach()
-  endif()
-endmacro()
-
-# Defines the compiler/linker flags used to build Google Test and
-# Google Mock.  You can tweak these definitions to suit your need.  A
-# variable's value is empty before it's explicitly assigned to.
-macro(config_compiler_and_linker)
-  # Note: pthreads on MinGW is not supported, even if available
-  # instead, we use windows threading primitives
-  unset(GTEST_HAS_PTHREAD)
-  if (NOT gtest_disable_pthreads AND NOT MINGW)
-    # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
-    find_package(Threads)
-    if (CMAKE_USE_PTHREADS_INIT)
-      set(GTEST_HAS_PTHREAD ON)
-    endif()
-  endif()
-
-  fix_default_compiler_settings_()
-  if (MSVC)
-    # Newlines inside flags variables break CMake's NMake generator.
-    # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
-    set(cxx_base_flags "-GS -W4 -WX -wd4251 -wd4275 -nologo -J -Zi")
-    set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")
-    set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")
-    set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")
-    set(cxx_no_exception_flags "-EHs-c- -D_HAS_EXCEPTIONS=0")
-    set(cxx_no_rtti_flags "-GR-")
-    # Suppress "unreachable code" warning
-    # http://stackoverflow.com/questions/3232669 explains the issue.
-    set(cxx_base_flags "${cxx_base_flags} -wd4702")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-    set(cxx_base_flags "-Wall -Wshadow -Werror -Wconversion")
-    set(cxx_exception_flags "-fexceptions")
-    set(cxx_no_exception_flags "-fno-exceptions")
-    set(cxx_strict_flags "-W -Wpointer-arith -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wunused-parameter -Wcast-align -Wchar-subscripts -Winline -Wredundant-decls")
-    set(cxx_no_rtti_flags "-fno-rtti")
-  elseif (CMAKE_COMPILER_IS_GNUCXX)
-    set(cxx_base_flags "-Wall -Wshadow -Werror")
-    if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0.0)
-      set(cxx_base_flags "${cxx_base_flags} -Wno-error=dangling-else")
-    endif()
-    set(cxx_exception_flags "-fexceptions")
-    set(cxx_no_exception_flags "-fno-exceptions")
-    # Until version 4.3.2, GCC doesn't define a macro to indicate
-    # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
-    # explicitly.
-    set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
-    set(cxx_strict_flags
-      "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
-    set(cxx_exception_flags "-features=except")
-    # Sun Pro doesn't provide macros to indicate whether exceptions and
-    # RTTI are enabled, so we define GTEST_HAS_* explicitly.
-    set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")
-    set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR
-      CMAKE_CXX_COMPILER_ID STREQUAL "XL")
-    # CMake 2.8 changes Visual Age's compiler ID to "XL".
-    set(cxx_exception_flags "-qeh")
-    set(cxx_no_exception_flags "-qnoeh")
-    # Until version 9.0, Visual Age doesn't define a macro to indicate
-    # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
-    # explicitly.
-    set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")
-    set(cxx_base_flags "-AA -mt")
-    set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")
-    set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")
-    # RTTI can not be disabled in HP aCC compiler.
-    set(cxx_no_rtti_flags "")
-  endif()
-
-  # The pthreads library is available and allowed?
-  if (DEFINED GTEST_HAS_PTHREAD)
-    set(GTEST_HAS_PTHREAD_MACRO "-DGTEST_HAS_PTHREAD=1")
-  else()
-    set(GTEST_HAS_PTHREAD_MACRO "-DGTEST_HAS_PTHREAD=0")
-  endif()
-  set(cxx_base_flags "${cxx_base_flags} ${GTEST_HAS_PTHREAD_MACRO}")
-
-  # For building gtest's own tests and samples.
-  set(cxx_exception "${cxx_base_flags} ${cxx_exception_flags}")
-  set(cxx_no_exception
-    "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")
-  set(cxx_default "${cxx_exception}")
-  set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")
-
-  # For building the gtest libraries.
-  set(cxx_strict "${cxx_default} ${cxx_strict_flags}")
-endmacro()
-
-# Defines the gtest & gtest_main libraries.  User tests should link
-# with one of them.
-function(cxx_library_with_type name type cxx_flags)
-  # type can be either STATIC or SHARED to denote a static or shared library.
-  # ARGN refers to additional arguments after 'cxx_flags'.
-  add_library(${name} ${type} ${ARGN})
-  set_target_properties(${name}
-    PROPERTIES
-    COMPILE_FLAGS "${cxx_flags}")
-  # Generate debug library name with a postfix.
-  set_target_properties(${name}
-    PROPERTIES
-    DEBUG_POSTFIX "d")
-  # Set the output directory for build artifacts
-  set_target_properties(${name}
-    PROPERTIES
-    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin"
-    LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-    ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-    PDB_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
-  # make PDBs match library name
-  get_target_property(pdb_debug_postfix ${name} DEBUG_POSTFIX)
-  set_target_properties(${name}
-    PROPERTIES
-    PDB_NAME "${name}"
-    PDB_NAME_DEBUG "${name}${pdb_debug_postfix}"
-    COMPILE_PDB_NAME "${name}"
-    COMPILE_PDB_NAME_DEBUG "${name}${pdb_debug_postfix}")
-
-  if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")
-    if (NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
-      target_compile_definitions(${name} INTERFACE
-        $<INSTALL_INTERFACE:GTEST_LINKED_AS_SHARED_LIBRARY=1>)
-    endif()
-  endif()
-  if (DEFINED GTEST_HAS_PTHREAD)
-    if ("${CMAKE_VERSION}" VERSION_LESS "3.1.0")
-      set(threads_spec ${CMAKE_THREAD_LIBS_INIT})
-    else()
-      set(threads_spec Threads::Threads)
-    endif()
-    target_link_libraries(${name} PUBLIC ${threads_spec})
-  endif()
-endfunction()
-
-########################################################################
-#
-# Helper functions for creating build targets.
-
-function(cxx_shared_library name cxx_flags)
-  cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})
-endfunction()
-
-function(cxx_library name cxx_flags)
-  cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})
-endfunction()
-
-# cxx_executable_with_flags(name cxx_flags libs srcs...)
-#
-# creates a named C++ executable that depends on the given libraries and
-# is built from the given source files with the given compiler flags.
-function(cxx_executable_with_flags name cxx_flags libs)
-  add_executable(${name} ${ARGN})
-  if (MSVC)
-    # BigObj required for tests.
-    set(cxx_flags "${cxx_flags} -bigobj")
-  endif()
-  if (cxx_flags)
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_FLAGS "${cxx_flags}")
-  endif()
-  if (BUILD_SHARED_LIBS)
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-  endif()
-  # To support mixing linking in static and dynamic libraries, link each
-  # library in with an extra call to target_link_libraries.
-  foreach (lib "${libs}")
-    target_link_libraries(${name} ${lib})
-  endforeach()
-endfunction()
-
-# cxx_executable(name dir lib srcs...)
-#
-# creates a named target that depends on the given libs and is built
-# from the given source files.  dir/name.cc is implicitly included in
-# the source file list.
-function(cxx_executable name dir libs)
-  cxx_executable_with_flags(
-    ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
-endfunction()
-
-# Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
-find_package(PythonInterp)
-
-# cxx_test_with_flags(name cxx_flags libs srcs...)
-#
-# creates a named C++ test that depends on the given libs and is built
-# from the given source files with the given compiler flags.
-function(cxx_test_with_flags name cxx_flags libs)
-  cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})
-  if (WIN32 OR MINGW)
-    add_test(NAME ${name}
-      COMMAND "powershell" "-Command" "${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/RunTest.ps1" "$<TARGET_FILE:${name}>")
-  else()
-    add_test(NAME ${name}
-      COMMAND "$<TARGET_FILE:${name}>")
-  endif()
-endfunction()
-
-# cxx_test(name libs srcs...)
-#
-# creates a named test target that depends on the given libs and is
-# built from the given source files.  Unlike cxx_test_with_flags,
-# test/name.cc is already implicitly included in the source file list.
-function(cxx_test name libs)
-  cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
-    "test/${name}.cc" ${ARGN})
-endfunction()
-
-# py_test(name)
-#
-# creates a Python test with the given name whose main module is in
-# test/name.py.  It does nothing if Python is not installed.
-function(py_test name)
-  if (PYTHONINTERP_FOUND)
-    if ("${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION}" VERSION_GREATER 3.1)
-      if (CMAKE_CONFIGURATION_TYPES)
-        # Multi-configuration build generators as for Visual Studio save
-        # output in a subdirectory of CMAKE_CURRENT_BINARY_DIR (Debug,
-        # Release etc.), so we have to provide it here.
-        if (WIN32 OR MINGW)
-          add_test(NAME ${name}
-            COMMAND powershell -Command ${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG>/RunTest.ps1
-              ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG> ${ARGN})
-        else()
-          add_test(NAME ${name}
-            COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR}/$<CONFIG> ${ARGN})
-        endif()
-      else (CMAKE_CONFIGURATION_TYPES)
-        # Single-configuration build generators like Makefile generators
-        # don't have subdirs below CMAKE_CURRENT_BINARY_DIR.
-        if (WIN32 OR MINGW)
-          add_test(NAME ${name}
-            COMMAND powershell -Command ${CMAKE_CURRENT_BINARY_DIR}/RunTest.ps1
-              ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR} ${ARGN})
-        else()
-          add_test(NAME ${name}
-            COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-              --build_dir=${CMAKE_CURRENT_BINARY_DIR} ${ARGN})
-        endif()
-      endif (CMAKE_CONFIGURATION_TYPES)
-    else()
-      # ${CMAKE_CURRENT_BINARY_DIR} is known at configuration time, so we can
-      # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known
-      # only at ctest runtime (by calling ctest -c <Configuration>), so
-      # we have to escape $ to delay variable substitution here.
-      if (WIN32 OR MINGW)
-        add_test(NAME ${name}
-          COMMAND powershell -Command ${CMAKE_CURRENT_BINARY_DIR}/RunTest.ps1
-            ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-            --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE} ${ARGN})
-      else()
-        add_test(NAME ${name}
-          COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-            --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE} ${ARGN})
-      endif()
-    endif()
-  endif(PYTHONINTERP_FOUND)
-endfunction()
-
-# install_project(targets...)
-#
-# Installs the specified targets and configures the associated pkgconfig files.
-function(install_project)
-  if(INSTALL_GTEST)
-    install(DIRECTORY "${PROJECT_SOURCE_DIR}/include/"
-      DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
-    # Install the project targets.
-    install(TARGETS ${ARGN}
-      EXPORT ${targets_export_name}
-      RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
-      ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
-      LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
-    if(CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-      # Install PDBs
-      foreach(t ${ARGN})
-        get_target_property(t_pdb_name ${t} COMPILE_PDB_NAME)
-        get_target_property(t_pdb_name_debug ${t} COMPILE_PDB_NAME_DEBUG)
-        get_target_property(t_pdb_output_directory ${t} PDB_OUTPUT_DIRECTORY)
-        install(FILES
-          "${t_pdb_output_directory}/\${CMAKE_INSTALL_CONFIG_NAME}/$<$<CONFIG:Debug>:${t_pdb_name_debug}>$<$<NOT:$<CONFIG:Debug>>:${t_pdb_name}>.pdb"
-          DESTINATION ${CMAKE_INSTALL_LIBDIR}
-          OPTIONAL)
-      endforeach()
-    endif()
-    # Configure and install pkgconfig files.
-    foreach(t ${ARGN})
-      set(configured_pc "${generated_dir}/${t}.pc")
-      configure_file("${PROJECT_SOURCE_DIR}/cmake/${t}.pc.in"
-        "${configured_pc}" @ONLY)
-      install(FILES "${configured_pc}"
-        DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-    endforeach()
-  endif()
-endfunction()
diff --git a/3rdparty/gtest/cmake/libgtest.la.in b/3rdparty/gtest/cmake/libgtest.la.in
deleted file mode 100644
index 840c8388..00000000
--- a/3rdparty/gtest/cmake/libgtest.la.in
+++ /dev/null
@@ -1,21 +0,0 @@
-# libgtest.la - a libtool library file
-# Generated by libtool (GNU libtool) 2.4.6
-
-# Please DO NOT delete this file!
-# It is necessary for linking the library.
-
-# Names of this library.
-library_names='libgtest.so'
-
-# Is this an already installed library?
-installed=yes
-
-# Should we warn about portability when linking against -modules?
-shouldnotlink=no
-
-# Files to dlopen/dlpreopen
-dlopen=''
-dlpreopen=''
-
-# Directory that this library needs to be installed in:
-libdir='@CMAKE_INSTALL_FULL_LIBDIR@'
diff --git a/3rdparty/gtest/docs/advanced.md b/3rdparty/gtest/docs/advanced.md
deleted file mode 100644
index 3e5f779d..00000000
--- a/3rdparty/gtest/docs/advanced.md
+++ /dev/null
@@ -1,2567 +0,0 @@
-# Advanced googletest Topics
-
-<!-- GOOGLETEST_CM0016 DO NOT DELETE -->
-
-## Introduction
-
-Now that you have read the [googletest Primer](primer.md) and learned how to
-write tests using googletest, it's time to learn some new tricks. This document
-will show you more assertions as well as how to construct complex failure
-messages, propagate fatal failures, reuse and speed up your test fixtures, and
-use various flags with your tests.
-
-## More Assertions
-
-This section covers some less frequently used, but still significant,
-assertions.
-
-### Explicit Success and Failure
-
-These three assertions do not actually test a value or expression. Instead, they
-generate a success or failure directly. Like the macros that actually perform a
-test, you may stream a custom failure message into them.
-
-```c++
-SUCCEED();
-```
-
-Generates a success. This does **NOT** make the overall test succeed. A test is
-considered successful only if none of its assertions fail during its execution.
-
-NOTE: `SUCCEED()` is purely documentary and currently doesn't generate any
-user-visible output. However, we may add `SUCCEED()` messages to googletest's
-output in the future.
-
-```c++
-FAIL();
-ADD_FAILURE();
-ADD_FAILURE_AT("file_path", line_number);
-```
-
-`FAIL()` generates a fatal failure, while `ADD_FAILURE()` and `ADD_FAILURE_AT()`
-generate a nonfatal failure. These are useful when control flow, rather than a
-Boolean expression, determines the test's success or failure. For example, you
-might want to write something like:
-
-```c++
-switch(expression) {
-  case 1:
-     ... some checks ...
-  case 2:
-     ... some other checks ...
-  default:
-     FAIL() << "We shouldn't get here.";
-}
-```
-
-NOTE: you can only use `FAIL()` in functions that return `void`. See the
-[Assertion Placement section](#assertion-placement) for more information.
-
-### Exception Assertions
-
-These are for verifying that a piece of code throws (or does not throw) an
-exception of the given type:
-
-Fatal assertion                            | Nonfatal assertion                         | Verifies
------------------------------------------- | ------------------------------------------ | --------
-`ASSERT_THROW(statement, exception_type);` | `EXPECT_THROW(statement, exception_type);` | `statement` throws an exception of the given type
-`ASSERT_ANY_THROW(statement);`             | `EXPECT_ANY_THROW(statement);`             | `statement` throws an exception of any type
-`ASSERT_NO_THROW(statement);`              | `EXPECT_NO_THROW(statement);`              | `statement` doesn't throw any exception
-
-Examples:
-
-```c++
-ASSERT_THROW(Foo(5), bar_exception);
-
-EXPECT_NO_THROW({
-  int n = 5;
-  Bar(&n);
-});
-```
-
-**Availability**: requires exceptions to be enabled in the build environment
-
-### Predicate Assertions for Better Error Messages
-
-Even though googletest has a rich set of assertions, they can never be complete,
-as it's impossible (nor a good idea) to anticipate all scenarios a user might
-run into. Therefore, sometimes a user has to use `EXPECT_TRUE()` to check a
-complex expression, for lack of a better macro. This has the problem of not
-showing you the values of the parts of the expression, making it hard to
-understand what went wrong. As a workaround, some users choose to construct the
-failure message by themselves, streaming it into `EXPECT_TRUE()`. However, this
-is awkward especially when the expression has side-effects or is expensive to
-evaluate.
-
-googletest gives you three different options to solve this problem:
-
-#### Using an Existing Boolean Function
-
-If you already have a function or functor that returns `bool` (or a type that
-can be implicitly converted to `bool`), you can use it in a *predicate
-assertion* to get the function arguments printed for free:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                   | Nonfatal assertion                | Verifies                    |
-| --------------------------------- | --------------------------------- | --------------------------- |
-| `ASSERT_PRED1(pred1, val1)`       | `EXPECT_PRED1(pred1, val1)`       | `pred1(val1)` is true       |
-| `ASSERT_PRED2(pred2, val1, val2)` | `EXPECT_PRED2(pred2, val1, val2)` | `pred1(val1, val2)` is true |
-| `...`                             | `...`                             | `...`                       |
-
-<!-- mdformat on-->
-In the above, `predn` is an `n`-ary predicate function or functor, where `val1`,
-`val2`, ..., and `valn` are its arguments. The assertion succeeds if the
-predicate returns `true` when applied to the given arguments, and fails
-otherwise. When the assertion fails, it prints the value of each argument. In
-either case, the arguments are evaluated exactly once.
-
-Here's an example. Given
-
-```c++
-// Returns true if m and n have no common divisors except 1.
-bool MutuallyPrime(int m, int n) { ... }
-
-const int a = 3;
-const int b = 4;
-const int c = 10;
-```
-
-the assertion
-
-```c++
-  EXPECT_PRED2(MutuallyPrime, a, b);
-```
-
-will succeed, while the assertion
-
-```c++
-  EXPECT_PRED2(MutuallyPrime, b, c);
-```
-
-will fail with the message
-
-```none
-MutuallyPrime(b, c) is false, where
-b is 4
-c is 10
-```
-
-> NOTE:
->
-> 1.  If you see a compiler error "no matching function to call" when using
->     `ASSERT_PRED*` or `EXPECT_PRED*`, please see
->     [this](faq.md#the-compiler-complains-no-matching-function-to-call-when-i-use-assert-pred-how-do-i-fix-it)
->     for how to resolve it.
-
-#### Using a Function That Returns an AssertionResult
-
-While `EXPECT_PRED*()` and friends are handy for a quick job, the syntax is not
-satisfactory: you have to use different macros for different arities, and it
-feels more like Lisp than C++. The `::testing::AssertionResult` class solves
-this problem.
-
-An `AssertionResult` object represents the result of an assertion (whether it's
-a success or a failure, and an associated message). You can create an
-`AssertionResult` using one of these factory functions:
-
-```c++
-namespace testing {
-
-// Returns an AssertionResult object to indicate that an assertion has
-// succeeded.
-AssertionResult AssertionSuccess();
-
-// Returns an AssertionResult object to indicate that an assertion has
-// failed.
-AssertionResult AssertionFailure();
-
-}
-```
-
-You can then use the `<<` operator to stream messages to the `AssertionResult`
-object.
-
-To provide more readable messages in Boolean assertions (e.g. `EXPECT_TRUE()`),
-write a predicate function that returns `AssertionResult` instead of `bool`. For
-example, if you define `IsEven()` as:
-
-```c++
-::testing::AssertionResult IsEven(int n) {
-  if ((n % 2) == 0)
-     return ::testing::AssertionSuccess();
-  else
-     return ::testing::AssertionFailure() << n << " is odd";
-}
-```
-
-instead of:
-
-```c++
-bool IsEven(int n) {
-  return (n % 2) == 0;
-}
-```
-
-the failed assertion `EXPECT_TRUE(IsEven(Fib(4)))` will print:
-
-```none
-Value of: IsEven(Fib(4))
-  Actual: false (3 is odd)
-Expected: true
-```
-
-instead of a more opaque
-
-```none
-Value of: IsEven(Fib(4))
-  Actual: false
-Expected: true
-```
-
-If you want informative messages in `EXPECT_FALSE` and `ASSERT_FALSE` as well
-(one third of Boolean assertions in the Google code base are negative ones), and
-are fine with making the predicate slower in the success case, you can supply a
-success message:
-
-```c++
-::testing::AssertionResult IsEven(int n) {
-  if ((n % 2) == 0)
-     return ::testing::AssertionSuccess() << n << " is even";
-  else
-     return ::testing::AssertionFailure() << n << " is odd";
-}
-```
-
-Then the statement `EXPECT_FALSE(IsEven(Fib(6)))` will print
-
-```none
-  Value of: IsEven(Fib(6))
-     Actual: true (8 is even)
-  Expected: false
-```
-
-#### Using a Predicate-Formatter
-
-If you find the default message generated by `(ASSERT|EXPECT)_PRED*` and
-`(ASSERT|EXPECT)_(TRUE|FALSE)` unsatisfactory, or some arguments to your
-predicate do not support streaming to `ostream`, you can instead use the
-following *predicate-formatter assertions* to *fully* customize how the message
-is formatted:
-
-Fatal assertion                                  | Nonfatal assertion                               | Verifies
------------------------------------------------- | ------------------------------------------------ | --------
-`ASSERT_PRED_FORMAT1(pred_format1, val1);`       | `EXPECT_PRED_FORMAT1(pred_format1, val1);`       | `pred_format1(val1)` is successful
-`ASSERT_PRED_FORMAT2(pred_format2, val1, val2);` | `EXPECT_PRED_FORMAT2(pred_format2, val1, val2);` | `pred_format2(val1, val2)` is successful
-`...`                                            | `...`                                            | ...
-
-The difference between this and the previous group of macros is that instead of
-a predicate, `(ASSERT|EXPECT)_PRED_FORMAT*` take a *predicate-formatter*
-(`pred_formatn`), which is a function or functor with the signature:
-
-```c++
-::testing::AssertionResult PredicateFormattern(const char* expr1,
-                                               const char* expr2,
-                                               ...
-                                               const char* exprn,
-                                               T1 val1,
-                                               T2 val2,
-                                               ...
-                                               Tn valn);
-```
-
-where `val1`, `val2`, ..., and `valn` are the values of the predicate arguments,
-and `expr1`, `expr2`, ..., and `exprn` are the corresponding expressions as they
-appear in the source code. The types `T1`, `T2`, ..., and `Tn` can be either
-value types or reference types. For example, if an argument has type `Foo`, you
-can declare it as either `Foo` or `const Foo&`, whichever is appropriate.
-
-As an example, let's improve the failure message in `MutuallyPrime()`, which was
-used with `EXPECT_PRED2()`:
-
-```c++
-// Returns the smallest prime common divisor of m and n,
-// or 1 when m and n are mutually prime.
-int SmallestPrimeCommonDivisor(int m, int n) { ... }
-
-// A predicate-formatter for asserting that two integers are mutually prime.
-::testing::AssertionResult AssertMutuallyPrime(const char* m_expr,
-                                               const char* n_expr,
-                                               int m,
-                                               int n) {
-  if (MutuallyPrime(m, n)) return ::testing::AssertionSuccess();
-
-  return ::testing::AssertionFailure() << m_expr << " and " << n_expr
-      << " (" << m << " and " << n << ") are not mutually prime, "
-      << "as they have a common divisor " << SmallestPrimeCommonDivisor(m, n);
-}
-```
-
-With this predicate-formatter, we can use
-
-```c++
-  EXPECT_PRED_FORMAT2(AssertMutuallyPrime, b, c);
-```
-
-to generate the message
-
-```none
-b and c (4 and 10) are not mutually prime, as they have a common divisor 2.
-```
-
-As you may have realized, many of the built-in assertions we introduced earlier
-are special cases of `(EXPECT|ASSERT)_PRED_FORMAT*`. In fact, most of them are
-indeed defined using `(EXPECT|ASSERT)_PRED_FORMAT*`.
-
-### Floating-Point Comparison
-
-Comparing floating-point numbers is tricky. Due to round-off errors, it is very
-unlikely that two floating-points will match exactly. Therefore, `ASSERT_EQ` 's
-naive comparison usually doesn't work. And since floating-points can have a wide
-value range, no single fixed error bound works. It's better to compare by a
-fixed relative error bound, except for values close to 0 due to the loss of
-precision there.
-
-In general, for floating-point comparison to make sense, the user needs to
-carefully choose the error bound. If they don't want or care to, comparing in
-terms of Units in the Last Place (ULPs) is a good default, and googletest
-provides assertions to do this. Full details about ULPs are quite long; if you
-want to learn more, see
-[here](https://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/).
-
-#### Floating-Point Macros
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                 | Nonfatal assertion              | Verifies                                 |
-| ------------------------------- | ------------------------------- | ---------------------------------------- |
-| `ASSERT_FLOAT_EQ(val1, val2);`  | `EXPECT_FLOAT_EQ(val1, val2);`  | the two `float` values are almost equal  |
-| `ASSERT_DOUBLE_EQ(val1, val2);` | `EXPECT_DOUBLE_EQ(val1, val2);` | the two `double` values are almost equal |
-
-<!-- mdformat on-->
-
-By "almost equal" we mean the values are within 4 ULP's from each other.
-
-The following assertions allow you to choose the acceptable error bound:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                       | Nonfatal assertion                    | Verifies                                                                         |
-| ------------------------------------- | ------------------------------------- | -------------------------------------------------------------------------------- |
-| `ASSERT_NEAR(val1, val2, abs_error);` | `EXPECT_NEAR(val1, val2, abs_error);` | the difference between `val1` and `val2` doesn't exceed the given absolute error |
-
-<!-- mdformat on-->
-
-#### Floating-Point Predicate-Format Functions
-
-Some floating-point operations are useful, but not that often used. In order to
-avoid an explosion of new macros, we provide them as predicate-format functions
-that can be used in predicate assertion macros (e.g. `EXPECT_PRED_FORMAT2`,
-etc).
-
-```c++
-EXPECT_PRED_FORMAT2(::testing::FloatLE, val1, val2);
-EXPECT_PRED_FORMAT2(::testing::DoubleLE, val1, val2);
-```
-
-Verifies that `val1` is less than, or almost equal to, `val2`. You can replace
-`EXPECT_PRED_FORMAT2` in the above table with `ASSERT_PRED_FORMAT2`.
-
-### Asserting Using gMock Matchers
-
-[gMock](../../googlemock) comes with a library of matchers for validating
-arguments passed to mock objects. A gMock *matcher* is basically a predicate
-that knows how to describe itself. It can be used in these assertion macros:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                | Nonfatal assertion             | Verifies              |
-| ------------------------------ | ------------------------------ | --------------------- |
-| `ASSERT_THAT(value, matcher);` | `EXPECT_THAT(value, matcher);` | value matches matcher |
-
-<!-- mdformat on-->
-
-For example, `StartsWith(prefix)` is a matcher that matches a string starting
-with `prefix`, and you can write:
-
-```c++
-using ::testing::StartsWith;
-...
-    // Verifies that Foo() returns a string starting with "Hello".
-    EXPECT_THAT(Foo(), StartsWith("Hello"));
-```
-
-Read this
-[recipe](../../googlemock/docs/cook_book.md#using-matchers-in-googletest-assertions)
-in the gMock Cookbook for more details.
-
-gMock has a rich set of matchers. You can do many things googletest cannot do
-alone with them. For a list of matchers gMock provides, read
-[this](../../googlemock/docs/cook_book.md##using-matchers). It's easy to write
-your [own matchers](../../googlemock/docs/cook_book.md#NewMatchers) too.
-
-gMock is bundled with googletest, so you don't need to add any build dependency
-in order to take advantage of this. Just include `"testing/base/public/gmock.h"`
-and you're ready to go.
-
-### More String Assertions
-
-(Please read the [previous](#asserting-using-gmock-matchers) section first if
-you haven't.)
-
-You can use the gMock
-[string matchers](../../googlemock/docs/cheat_sheet.md#string-matchers) with
-`EXPECT_THAT()` or `ASSERT_THAT()` to do more string comparison tricks
-(sub-string, prefix, suffix, regular expression, and etc). For example,
-
-```c++
-using ::testing::HasSubstr;
-using ::testing::MatchesRegex;
-...
-  ASSERT_THAT(foo_string, HasSubstr("needle"));
-  EXPECT_THAT(bar_string, MatchesRegex("\\w*\\d+"));
-```
-
-If the string contains a well-formed HTML or XML document, you can check whether
-its DOM tree matches an
-[XPath expression](http://www.w3.org/TR/xpath/#contents):
-
-```c++
-// Currently still in //template/prototemplate/testing:xpath_matcher
-#include "template/prototemplate/testing/xpath_matcher.h"
-using prototemplate::testing::MatchesXPath;
-EXPECT_THAT(html_string, MatchesXPath("//a[text()='click here']"));
-```
-
-### Windows HRESULT assertions
-
-These assertions test for `HRESULT` success or failure.
-
-Fatal assertion                        | Nonfatal assertion                     | Verifies
--------------------------------------- | -------------------------------------- | --------
-`ASSERT_HRESULT_SUCCEEDED(expression)` | `EXPECT_HRESULT_SUCCEEDED(expression)` | `expression` is a success `HRESULT`
-`ASSERT_HRESULT_FAILED(expression)`    | `EXPECT_HRESULT_FAILED(expression)`    | `expression` is a failure `HRESULT`
-
-The generated output contains the human-readable error message associated with
-the `HRESULT` code returned by `expression`.
-
-You might use them like this:
-
-```c++
-CComPtr<IShellDispatch2> shell;
-ASSERT_HRESULT_SUCCEEDED(shell.CoCreateInstance(L"Shell.Application"));
-CComVariant empty;
-ASSERT_HRESULT_SUCCEEDED(shell->ShellExecute(CComBSTR(url), empty, empty, empty, empty));
-```
-
-### Type Assertions
-
-You can call the function
-
-```c++
-::testing::StaticAssertTypeEq<T1, T2>();
-```
-
-to assert that types `T1` and `T2` are the same. The function does nothing if
-the assertion is satisfied. If the types are different, the function call will
-fail to compile, the compiler error message will say that
-`type1 and type2 are not the same type` and most likely (depending on the compiler)
-show you the actual values of `T1` and `T2`. This is mainly useful inside
-template code.
-
-**Caveat**: When used inside a member function of a class template or a function
-template, `StaticAssertTypeEq<T1, T2>()` is effective only if the function is
-instantiated. For example, given:
-
-```c++
-template <typename T> class Foo {
- public:
-  void Bar() { ::testing::StaticAssertTypeEq<int, T>(); }
-};
-```
-
-the code:
-
-```c++
-void Test1() { Foo<bool> foo; }
-```
-
-will not generate a compiler error, as `Foo<bool>::Bar()` is never actually
-instantiated. Instead, you need:
-
-```c++
-void Test2() { Foo<bool> foo; foo.Bar(); }
-```
-
-to cause a compiler error.
-
-### Assertion Placement
-
-You can use assertions in any C++ function. In particular, it doesn't have to be
-a method of the test fixture class. The one constraint is that assertions that
-generate a fatal failure (`FAIL*` and `ASSERT_*`) can only be used in
-void-returning functions. This is a consequence of Google's not using
-exceptions. By placing it in a non-void function you'll get a confusing compile
-error like `"error: void value not ignored as it ought to be"` or `"cannot
-initialize return object of type 'bool' with an rvalue of type 'void'"` or
-`"error: no viable conversion from 'void' to 'string'"`.
-
-If you need to use fatal assertions in a function that returns non-void, one
-option is to make the function return the value in an out parameter instead. For
-example, you can rewrite `T2 Foo(T1 x)` to `void Foo(T1 x, T2* result)`. You
-need to make sure that `*result` contains some sensible value even when the
-function returns prematurely. As the function now returns `void`, you can use
-any assertion inside of it.
-
-If changing the function's type is not an option, you should just use assertions
-that generate non-fatal failures, such as `ADD_FAILURE*` and `EXPECT_*`.
-
-NOTE: Constructors and destructors are not considered void-returning functions,
-according to the C++ language specification, and so you may not use fatal
-assertions in them; you'll get a compilation error if you try. Instead, either
-call `abort` and crash the entire test executable, or put the fatal assertion in
-a `SetUp`/`TearDown` function; see
-[constructor/destructor vs. `SetUp`/`TearDown`](faq.md#CtorVsSetUp)
-
-WARNING: A fatal assertion in a helper function (private void-returning method)
-called from a constructor or destructor does not does not terminate the current
-test, as your intuition might suggest: it merely returns from the constructor or
-destructor early, possibly leaving your object in a partially-constructed or
-partially-destructed state! You almost certainly want to `abort` or use
-`SetUp`/`TearDown` instead.
-
-## Teaching googletest How to Print Your Values
-
-When a test assertion such as `EXPECT_EQ` fails, googletest prints the argument
-values to help you debug. It does this using a user-extensible value printer.
-
-This printer knows how to print built-in C++ types, native arrays, STL
-containers, and any type that supports the `<<` operator. For other types, it
-prints the raw bytes in the value and hopes that you the user can figure it out.
-
-As mentioned earlier, the printer is *extensible*. That means you can teach it
-to do a better job at printing your particular type than to dump the bytes. To
-do that, define `<<` for your type:
-
-```c++
-#include <ostream>
-
-namespace foo {
-
-class Bar {  // We want googletest to be able to print instances of this.
-...
-  // Create a free inline friend function.
-  friend std::ostream& operator<<(std::ostream& os, const Bar& bar) {
-    return os << bar.DebugString();  // whatever needed to print bar to os
-  }
-};
-
-// If you can't declare the function in the class it's important that the
-// << operator is defined in the SAME namespace that defines Bar.  C++'s look-up
-// rules rely on that.
-std::ostream& operator<<(std::ostream& os, const Bar& bar) {
-  return os << bar.DebugString();  // whatever needed to print bar to os
-}
-
-}  // namespace foo
-```
-
-Sometimes, this might not be an option: your team may consider it bad style to
-have a `<<` operator for `Bar`, or `Bar` may already have a `<<` operator that
-doesn't do what you want (and you cannot change it). If so, you can instead
-define a `PrintTo()` function like this:
-
-```c++
-#include <ostream>
-
-namespace foo {
-
-class Bar {
-  ...
-  friend void PrintTo(const Bar& bar, std::ostream* os) {
-    *os << bar.DebugString();  // whatever needed to print bar to os
-  }
-};
-
-// If you can't declare the function in the class it's important that PrintTo()
-// is defined in the SAME namespace that defines Bar.  C++'s look-up rules rely
-// on that.
-void PrintTo(const Bar& bar, std::ostream* os) {
-  *os << bar.DebugString();  // whatever needed to print bar to os
-}
-
-}  // namespace foo
-```
-
-If you have defined both `<<` and `PrintTo()`, the latter will be used when
-googletest is concerned. This allows you to customize how the value appears in
-googletest's output without affecting code that relies on the behavior of its
-`<<` operator.
-
-If you want to print a value `x` using googletest's value printer yourself, just
-call `::testing::PrintToString(x)`, which returns an `std::string`:
-
-```c++
-vector<pair<Bar, int> > bar_ints = GetBarIntVector();
-
-EXPECT_TRUE(IsCorrectBarIntVector(bar_ints))
-    << "bar_ints = " << ::testing::PrintToString(bar_ints);
-```
-
-## Death Tests
-
-In many applications, there are assertions that can cause application failure if
-a condition is not met. These sanity checks, which ensure that the program is in
-a known good state, are there to fail at the earliest possible time after some
-program state is corrupted. If the assertion checks the wrong condition, then
-the program may proceed in an erroneous state, which could lead to memory
-corruption, security holes, or worse. Hence it is vitally important to test that
-such assertion statements work as expected.
-
-Since these precondition checks cause the processes to die, we call such tests
-_death tests_. More generally, any test that checks that a program terminates
-(except by throwing an exception) in an expected fashion is also a death test.
-
-Note that if a piece of code throws an exception, we don't consider it "death"
-for the purpose of death tests, as the caller of the code could catch the
-exception and avoid the crash. If you want to verify exceptions thrown by your
-code, see [Exception Assertions](#ExceptionAssertions).
-
-If you want to test `EXPECT_*()/ASSERT_*()` failures in your test code, see
-Catching Failures
-
-### How to Write a Death Test
-
-googletest has the following macros to support death tests:
-
-Fatal assertion                                  | Nonfatal assertion                               | Verifies
------------------------------------------------- | ------------------------------------------------ | --------
-`ASSERT_DEATH(statement, matcher);`              | `EXPECT_DEATH(statement, matcher);`              | `statement` crashes with the given error
-`ASSERT_DEATH_IF_SUPPORTED(statement, matcher);` | `EXPECT_DEATH_IF_SUPPORTED(statement, matcher);` | if death tests are supported, verifies that `statement` crashes with the given error; otherwise verifies nothing
-`ASSERT_EXIT(statement, predicate, matcher);`    | `EXPECT_EXIT(statement, predicate, matcher);`    | `statement` exits with the given error, and its exit code matches `predicate`
-
-where `statement` is a statement that is expected to cause the process to die,
-`predicate` is a function or function object that evaluates an integer exit
-status, and `matcher` is either a GMock matcher matching a `const std::string&`
-or a (Perl) regular expression - either of which is matched against the stderr
-output of `statement`. For legacy reasons, a bare string (i.e. with no matcher)
-is interpreted as `ContainsRegex(str)`, **not** `Eq(str)`. Note that `statement`
-can be *any valid statement* (including *compound statement*) and doesn't have
-to be an expression.
-
-As usual, the `ASSERT` variants abort the current test function, while the
-`EXPECT` variants do not.
-
-> NOTE: We use the word "crash" here to mean that the process terminates with a
-> *non-zero* exit status code. There are two possibilities: either the process
-> has called `exit()` or `_exit()` with a non-zero value, or it may be killed by
-> a signal.
->
-> This means that if `*statement*` terminates the process with a 0 exit code, it
-> is *not* considered a crash by `EXPECT_DEATH`. Use `EXPECT_EXIT` instead if
-> this is the case, or if you want to restrict the exit code more precisely.
-
-A predicate here must accept an `int` and return a `bool`. The death test
-succeeds only if the predicate returns `true`. googletest defines a few
-predicates that handle the most common cases:
-
-```c++
-::testing::ExitedWithCode(exit_code)
-```
-
-This expression is `true` if the program exited normally with the given exit
-code.
-
-```c++
-::testing::KilledBySignal(signal_number)  // Not available on Windows.
-```
-
-This expression is `true` if the program was killed by the given signal.
-
-The `*_DEATH` macros are convenient wrappers for `*_EXIT` that use a predicate
-that verifies the process' exit code is non-zero.
-
-Note that a death test only cares about three things:
-
-1.  does `statement` abort or exit the process?
-2.  (in the case of `ASSERT_EXIT` and `EXPECT_EXIT`) does the exit status
-    satisfy `predicate`? Or (in the case of `ASSERT_DEATH` and `EXPECT_DEATH`)
-    is the exit status non-zero? And
-3.  does the stderr output match `regex`?
-
-In particular, if `statement` generates an `ASSERT_*` or `EXPECT_*` failure, it
-will **not** cause the death test to fail, as googletest assertions don't abort
-the process.
-
-To write a death test, simply use one of the above macros inside your test
-function. For example,
-
-```c++
-TEST(MyDeathTest, Foo) {
-  // This death test uses a compound statement.
-  ASSERT_DEATH({
-    int n = 5;
-    Foo(&n);
-  }, "Error on line .* of Foo()");
-}
-
-TEST(MyDeathTest, NormalExit) {
-  EXPECT_EXIT(NormalExit(), ::testing::ExitedWithCode(0), "Success");
-}
-
-TEST(MyDeathTest, KillMyself) {
-  EXPECT_EXIT(KillMyself(), ::testing::KilledBySignal(SIGKILL),
-              "Sending myself unblockable signal");
-}
-```
-
-verifies that:
-
-*   calling `Foo(5)` causes the process to die with the given error message,
-*   calling `NormalExit()` causes the process to print `"Success"` to stderr and
-    exit with exit code 0, and
-*   calling `KillMyself()` kills the process with signal `SIGKILL`.
-
-The test function body may contain other assertions and statements as well, if
-necessary.
-
-### Death Test Naming
-
-IMPORTANT: We strongly recommend you to follow the convention of naming your
-**test suite** (not test) `*DeathTest` when it contains a death test, as
-demonstrated in the above example. The
-[Death Tests And Threads](#death-tests-and-threads) section below explains why.
-
-If a test fixture class is shared by normal tests and death tests, you can use
-`using` or `typedef` to introduce an alias for the fixture class and avoid
-duplicating its code:
-
-```c++
-class FooTest : public ::testing::Test { ... };
-
-using FooDeathTest = FooTest;
-
-TEST_F(FooTest, DoesThis) {
-  // normal test
-}
-
-TEST_F(FooDeathTest, DoesThat) {
-  // death test
-}
-```
-
-### Regular Expression Syntax
-
-On POSIX systems (e.g. Linux, Cygwin, and Mac), googletest uses the
-[POSIX extended regular expression](http://www.opengroup.org/onlinepubs/009695399/basedefs/xbd_chap09.html#tag_09_04)
-syntax. To learn about this syntax, you may want to read this
-[Wikipedia entry](http://en.wikipedia.org/wiki/Regular_expression#POSIX_Extended_Regular_Expressions).
-
-On Windows, googletest uses its own simple regular expression implementation. It
-lacks many features. For example, we don't support union (`"x|y"`), grouping
-(`"(xy)"`), brackets (`"[xy]"`), and repetition count (`"x{5,7}"`), among
-others. Below is what we do support (`A` denotes a literal character, period
-(`.`), or a single `\\ ` escape sequence; `x` and `y` denote regular
-expressions.):
-
-Expression | Meaning
----------- | --------------------------------------------------------------
-`c`        | matches any literal character `c`
-`\\d`      | matches any decimal digit
-`\\D`      | matches any character that's not a decimal digit
-`\\f`      | matches `\f`
-`\\n`      | matches `\n`
-`\\r`      | matches `\r`
-`\\s`      | matches any ASCII whitespace, including `\n`
-`\\S`      | matches any character that's not a whitespace
-`\\t`      | matches `\t`
-`\\v`      | matches `\v`
-`\\w`      | matches any letter, `_`, or decimal digit
-`\\W`      | matches any character that `\\w` doesn't match
-`\\c`      | matches any literal character `c`, which must be a punctuation
-`.`        | matches any single character except `\n`
-`A?`       | matches 0 or 1 occurrences of `A`
-`A*`       | matches 0 or many occurrences of `A`
-`A+`       | matches 1 or many occurrences of `A`
-`^`        | matches the beginning of a string (not that of each line)
-`$`        | matches the end of a string (not that of each line)
-`xy`       | matches `x` followed by `y`
-
-To help you determine which capability is available on your system, googletest
-defines macros to govern which regular expression it is using. The macros are:
-`GTEST_USES_SIMPLE_RE=1` or `GTEST_USES_POSIX_RE=1`. If you want your death
-tests to work in all cases, you can either `#if` on these macros or use the more
-limited syntax only.
-
-### How It Works
-
-Under the hood, `ASSERT_EXIT()` spawns a new process and executes the death test
-statement in that process. The details of how precisely that happens depend on
-the platform and the variable ::testing::GTEST_FLAG(death_test_style) (which is
-initialized from the command-line flag `--gtest_death_test_style`).
-
-*   On POSIX systems, `fork()` (or `clone()` on Linux) is used to spawn the
-    child, after which:
-    *   If the variable's value is `"fast"`, the death test statement is
-        immediately executed.
-    *   If the variable's value is `"threadsafe"`, the child process re-executes
-        the unit test binary just as it was originally invoked, but with some
-        extra flags to cause just the single death test under consideration to
-        be run.
-*   On Windows, the child is spawned using the `CreateProcess()` API, and
-    re-executes the binary to cause just the single death test under
-    consideration to be run - much like the `threadsafe` mode on POSIX.
-
-Other values for the variable are illegal and will cause the death test to fail.
-Currently, the flag's default value is **"fast"**
-
-1.  the child's exit status satisfies the predicate, and
-2.  the child's stderr matches the regular expression.
-
-If the death test statement runs to completion without dying, the child process
-will nonetheless terminate, and the assertion fails.
-
-### Death Tests And Threads
-
-The reason for the two death test styles has to do with thread safety. Due to
-well-known problems with forking in the presence of threads, death tests should
-be run in a single-threaded context. Sometimes, however, it isn't feasible to
-arrange that kind of environment. For example, statically-initialized modules
-may start threads before main is ever reached. Once threads have been created,
-it may be difficult or impossible to clean them up.
-
-googletest has three features intended to raise awareness of threading issues.
-
-1.  A warning is emitted if multiple threads are running when a death test is
-    encountered.
-2.  Test suites with a name ending in "DeathTest" are run before all other
-    tests.
-3.  It uses `clone()` instead of `fork()` to spawn the child process on Linux
-    (`clone()` is not available on Cygwin and Mac), as `fork()` is more likely
-    to cause the child to hang when the parent process has multiple threads.
-
-It's perfectly fine to create threads inside a death test statement; they are
-executed in a separate process and cannot affect the parent.
-
-### Death Test Styles
-
-The "threadsafe" death test style was introduced in order to help mitigate the
-risks of testing in a possibly multithreaded environment. It trades increased
-test execution time (potentially dramatically so) for improved thread safety.
-
-The automated testing framework does not set the style flag. You can choose a
-particular style of death tests by setting the flag programmatically:
-
-```c++
-testing::FLAGS_gtest_death_test_style="threadsafe"
-```
-
-You can do this in `main()` to set the style for all death tests in the binary,
-or in individual tests. Recall that flags are saved before running each test and
-restored afterwards, so you need not do that yourself. For example:
-
-```c++
-int main(int argc, char** argv) {
-  InitGoogle(argv[0], &argc, &argv, true);
-  ::testing::FLAGS_gtest_death_test_style = "fast";
-  return RUN_ALL_TESTS();
-}
-
-TEST(MyDeathTest, TestOne) {
-  ::testing::FLAGS_gtest_death_test_style = "threadsafe";
-  // This test is run in the "threadsafe" style:
-  ASSERT_DEATH(ThisShouldDie(), "");
-}
-
-TEST(MyDeathTest, TestTwo) {
-  // This test is run in the "fast" style:
-  ASSERT_DEATH(ThisShouldDie(), "");
-}
-```
-
-### Caveats
-
-The `statement` argument of `ASSERT_EXIT()` can be any valid C++ statement. If
-it leaves the current function via a `return` statement or by throwing an
-exception, the death test is considered to have failed. Some googletest macros
-may return from the current function (e.g. `ASSERT_TRUE()`), so be sure to avoid
-them in `statement`.
-
-Since `statement` runs in the child process, any in-memory side effect (e.g.
-modifying a variable, releasing memory, etc) it causes will *not* be observable
-in the parent process. In particular, if you release memory in a death test,
-your program will fail the heap check as the parent process will never see the
-memory reclaimed. To solve this problem, you can
-
-1.  try not to free memory in a death test;
-2.  free the memory again in the parent process; or
-3.  do not use the heap checker in your program.
-
-Due to an implementation detail, you cannot place multiple death test assertions
-on the same line; otherwise, compilation will fail with an unobvious error
-message.
-
-Despite the improved thread safety afforded by the "threadsafe" style of death
-test, thread problems such as deadlock are still possible in the presence of
-handlers registered with `pthread_atfork(3)`.
-
-
-## Using Assertions in Sub-routines
-
-### Adding Traces to Assertions
-
-If a test sub-routine is called from several places, when an assertion inside it
-fails, it can be hard to tell which invocation of the sub-routine the failure is
-from. You can alleviate this problem using extra logging or custom failure
-messages, but that usually clutters up your tests. A better solution is to use
-the `SCOPED_TRACE` macro or the `ScopedTrace` utility:
-
-```c++
-SCOPED_TRACE(message);
-ScopedTrace trace("file_path", line_number, message);
-```
-
-where `message` can be anything streamable to `std::ostream`. `SCOPED_TRACE`
-macro will cause the current file name, line number, and the given message to be
-added in every failure message. `ScopedTrace` accepts explicit file name and
-line number in arguments, which is useful for writing test helpers. The effect
-will be undone when the control leaves the current lexical scope.
-
-For example,
-
-```c++
-10: void Sub1(int n) {
-11:   EXPECT_EQ(Bar(n), 1);
-12:   EXPECT_EQ(Bar(n + 1), 2);
-13: }
-14:
-15: TEST(FooTest, Bar) {
-16:   {
-17:     SCOPED_TRACE("A");  // This trace point will be included in
-18:                         // every failure in this scope.
-19:     Sub1(1);
-20:   }
-21:   // Now it won't.
-22:   Sub1(9);
-23: }
-```
-
-could result in messages like these:
-
-```none
-path/to/foo_test.cc:11: Failure
-Value of: Bar(n)
-Expected: 1
-  Actual: 2
-   Trace:
-path/to/foo_test.cc:17: A
-
-path/to/foo_test.cc:12: Failure
-Value of: Bar(n + 1)
-Expected: 2
-  Actual: 3
-```
-
-Without the trace, it would've been difficult to know which invocation of
-`Sub1()` the two failures come from respectively. (You could add an extra
-message to each assertion in `Sub1()` to indicate the value of `n`, but that's
-tedious.)
-
-Some tips on using `SCOPED_TRACE`:
-
-1.  With a suitable message, it's often enough to use `SCOPED_TRACE` at the
-    beginning of a sub-routine, instead of at each call site.
-2.  When calling sub-routines inside a loop, make the loop iterator part of the
-    message in `SCOPED_TRACE` such that you can know which iteration the failure
-    is from.
-3.  Sometimes the line number of the trace point is enough for identifying the
-    particular invocation of a sub-routine. In this case, you don't have to
-    choose a unique message for `SCOPED_TRACE`. You can simply use `""`.
-4.  You can use `SCOPED_TRACE` in an inner scope when there is one in the outer
-    scope. In this case, all active trace points will be included in the failure
-    messages, in reverse order they are encountered.
-5.  The trace dump is clickable in Emacs - hit `return` on a line number and
-    you'll be taken to that line in the source file!
-
-### Propagating Fatal Failures
-
-A common pitfall when using `ASSERT_*` and `FAIL*` is not understanding that
-when they fail they only abort the _current function_, not the entire test. For
-example, the following test will segfault:
-
-```c++
-void Subroutine() {
-  // Generates a fatal failure and aborts the current function.
-  ASSERT_EQ(1, 2);
-
-  // The following won't be executed.
-  ...
-}
-
-TEST(FooTest, Bar) {
-  Subroutine();  // The intended behavior is for the fatal failure
-                 // in Subroutine() to abort the entire test.
-
-  // The actual behavior: the function goes on after Subroutine() returns.
-  int* p = NULL;
-  *p = 3;  // Segfault!
-}
-```
-
-To alleviate this, googletest provides three different solutions. You could use
-either exceptions, the `(ASSERT|EXPECT)_NO_FATAL_FAILURE` assertions or the
-`HasFatalFailure()` function. They are described in the following two
-subsections.
-
-#### Asserting on Subroutines with an exception
-
-The following code can turn ASSERT-failure into an exception:
-
-```c++
-class ThrowListener : public testing::EmptyTestEventListener {
-  void OnTestPartResult(const testing::TestPartResult& result) override {
-    if (result.type() == testing::TestPartResult::kFatalFailure) {
-      throw testing::AssertionException(result);
-    }
-  }
-};
-int main(int argc, char** argv) {
-  ...
-  testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
-  return RUN_ALL_TESTS();
-}
-```
-
-This listener should be added after other listeners if you have any, otherwise
-they won't see failed `OnTestPartResult`.
-
-#### Asserting on Subroutines
-
-As shown above, if your test calls a subroutine that has an `ASSERT_*` failure
-in it, the test will continue after the subroutine returns. This may not be what
-you want.
-
-Often people want fatal failures to propagate like exceptions. For that
-googletest offers the following macros:
-
-Fatal assertion                       | Nonfatal assertion                    | Verifies
-------------------------------------- | ------------------------------------- | --------
-`ASSERT_NO_FATAL_FAILURE(statement);` | `EXPECT_NO_FATAL_FAILURE(statement);` | `statement` doesn't generate any new fatal failures in the current thread.
-
-Only failures in the thread that executes the assertion are checked to determine
-the result of this type of assertions. If `statement` creates new threads,
-failures in these threads are ignored.
-
-Examples:
-
-```c++
-ASSERT_NO_FATAL_FAILURE(Foo());
-
-int i;
-EXPECT_NO_FATAL_FAILURE({
-  i = Bar();
-});
-```
-
-Assertions from multiple threads are currently not supported on Windows.
-
-#### Checking for Failures in the Current Test
-
-`HasFatalFailure()` in the `::testing::Test` class returns `true` if an
-assertion in the current test has suffered a fatal failure. This allows
-functions to catch fatal failures in a sub-routine and return early.
-
-```c++
-class Test {
- public:
-  ...
-  static bool HasFatalFailure();
-};
-```
-
-The typical usage, which basically simulates the behavior of a thrown exception,
-is:
-
-```c++
-TEST(FooTest, Bar) {
-  Subroutine();
-  // Aborts if Subroutine() had a fatal failure.
-  if (HasFatalFailure()) return;
-
-  // The following won't be executed.
-  ...
-}
-```
-
-If `HasFatalFailure()` is used outside of `TEST()` , `TEST_F()` , or a test
-fixture, you must add the `::testing::Test::` prefix, as in:
-
-```c++
-if (::testing::Test::HasFatalFailure()) return;
-```
-
-Similarly, `HasNonfatalFailure()` returns `true` if the current test has at
-least one non-fatal failure, and `HasFailure()` returns `true` if the current
-test has at least one failure of either kind.
-
-## Logging Additional Information
-
-In your test code, you can call `RecordProperty("key", value)` to log additional
-information, where `value` can be either a string or an `int`. The *last* value
-recorded for a key will be emitted to the
-[XML output](#generating-an-xml-report) if you specify one. For example, the
-test
-
-```c++
-TEST_F(WidgetUsageTest, MinAndMaxWidgets) {
-  RecordProperty("MaximumWidgets", ComputeMaxUsage());
-  RecordProperty("MinimumWidgets", ComputeMinUsage());
-}
-```
-
-will output XML like this:
-
-```xml
-  ...
-    <testcase name="MinAndMaxWidgets" status="run" time="0.006" classname="WidgetUsageTest" MaximumWidgets="12" MinimumWidgets="9" />
-  ...
-```
-
-> NOTE:
->
-> *   `RecordProperty()` is a static member of the `Test` class. Therefore it
->     needs to be prefixed with `::testing::Test::` if used outside of the
->     `TEST` body and the test fixture class.
-> *   `*key*` must be a valid XML attribute name, and cannot conflict with the
->     ones already used by googletest (`name`, `status`, `time`, `classname`,
->     `type_param`, and `value_param`).
-> *   Calling `RecordProperty()` outside of the lifespan of a test is allowed.
->     If it's called outside of a test but between a test suite's
->     `SetUpTestSuite()` and `TearDownTestSuite()` methods, it will be
->     attributed to the XML element for the test suite. If it's called outside
->     of all test suites (e.g. in a test environment), it will be attributed to
->     the top-level XML element.
-
-## Sharing Resources Between Tests in the Same Test Suite
-
-googletest creates a new test fixture object for each test in order to make
-tests independent and easier to debug. However, sometimes tests use resources
-that are expensive to set up, making the one-copy-per-test model prohibitively
-expensive.
-
-If the tests don't change the resource, there's no harm in their sharing a
-single resource copy. So, in addition to per-test set-up/tear-down, googletest
-also supports per-test-suite set-up/tear-down. To use it:
-
-1.  In your test fixture class (say `FooTest` ), declare as `static` some member
-    variables to hold the shared resources.
-2.  Outside your test fixture class (typically just below it), define those
-    member variables, optionally giving them initial values.
-3.  In the same test fixture class, define a `static void SetUpTestSuite()`
-    function (remember not to spell it as **`SetupTestSuite`** with a small
-    `u`!) to set up the shared resources and a `static void TearDownTestSuite()`
-    function to tear them down.
-
-That's it! googletest automatically calls `SetUpTestSuite()` before running the
-*first test* in the `FooTest` test suite (i.e. before creating the first
-`FooTest` object), and calls `TearDownTestSuite()` after running the *last test*
-in it (i.e. after deleting the last `FooTest` object). In between, the tests can
-use the shared resources.
-
-Remember that the test order is undefined, so your code can't depend on a test
-preceding or following another. Also, the tests must either not modify the state
-of any shared resource, or, if they do modify the state, they must restore the
-state to its original value before passing control to the next test.
-
-Here's an example of per-test-suite set-up and tear-down:
-
-```c++
-class FooTest : public ::testing::Test {
- protected:
-  // Per-test-suite set-up.
-  // Called before the first test in this test suite.
-  // Can be omitted if not needed.
-  static void SetUpTestSuite() {
-    shared_resource_ = new ...;
-  }
-
-  // Per-test-suite tear-down.
-  // Called after the last test in this test suite.
-  // Can be omitted if not needed.
-  static void TearDownTestSuite() {
-    delete shared_resource_;
-    shared_resource_ = NULL;
-  }
-
-  // You can define per-test set-up logic as usual.
-  virtual void SetUp() { ... }
-
-  // You can define per-test tear-down logic as usual.
-  virtual void TearDown() { ... }
-
-  // Some expensive resource shared by all tests.
-  static T* shared_resource_;
-};
-
-T* FooTest::shared_resource_ = NULL;
-
-TEST_F(FooTest, Test1) {
-  ... you can refer to shared_resource_ here ...
-}
-
-TEST_F(FooTest, Test2) {
-  ... you can refer to shared_resource_ here ...
-}
-```
-
-NOTE: Though the above code declares `SetUpTestSuite()` protected, it may
-sometimes be necessary to declare it public, such as when using it with
-`TEST_P`.
-
-## Global Set-Up and Tear-Down
-
-Just as you can do set-up and tear-down at the test level and the test suite
-level, you can also do it at the test program level. Here's how.
-
-First, you subclass the `::testing::Environment` class to define a test
-environment, which knows how to set-up and tear-down:
-
-```c++
-class Environment : public ::testing::Environment {
- public:
-  virtual ~Environment() {}
-
-  // Override this to define how to set up the environment.
-  void SetUp() override {}
-
-  // Override this to define how to tear down the environment.
-  void TearDown() override {}
-};
-```
-
-Then, you register an instance of your environment class with googletest by
-calling the `::testing::AddGlobalTestEnvironment()` function:
-
-```c++
-Environment* AddGlobalTestEnvironment(Environment* env);
-```
-
-Now, when `RUN_ALL_TESTS()` is called, it first calls the `SetUp()` method of
-each environment object, then runs the tests if none of the environments
-reported fatal failures and `GTEST_SKIP()` was not called. `RUN_ALL_TESTS()`
-always calls `TearDown()` with each environment object, regardless of whether or
-not the tests were run.
-
-It's OK to register multiple environment objects. In this suite, their `SetUp()`
-will be called in the order they are registered, and their `TearDown()` will be
-called in the reverse order.
-
-Note that googletest takes ownership of the registered environment objects.
-Therefore **do not delete them** by yourself.
-
-You should call `AddGlobalTestEnvironment()` before `RUN_ALL_TESTS()` is called,
-probably in `main()`. If you use `gtest_main`, you need to call this before
-`main()` starts for it to take effect. One way to do this is to define a global
-variable like this:
-
-```c++
-::testing::Environment* const foo_env =
-    ::testing::AddGlobalTestEnvironment(new FooEnvironment);
-```
-
-However, we strongly recommend you to write your own `main()` and call
-`AddGlobalTestEnvironment()` there, as relying on initialization of global
-variables makes the code harder to read and may cause problems when you register
-multiple environments from different translation units and the environments have
-dependencies among them (remember that the compiler doesn't guarantee the order
-in which global variables from different translation units are initialized).
-
-## Value-Parameterized Tests
-
-*Value-parameterized tests* allow you to test your code with different
-parameters without writing multiple copies of the same test. This is useful in a
-number of situations, for example:
-
-*   You have a piece of code whose behavior is affected by one or more
-    command-line flags. You want to make sure your code performs correctly for
-    various values of those flags.
-*   You want to test different implementations of an OO interface.
-*   You want to test your code over various inputs (a.k.a. data-driven testing).
-    This feature is easy to abuse, so please exercise your good sense when doing
-    it!
-
-### How to Write Value-Parameterized Tests
-
-To write value-parameterized tests, first you should define a fixture class. It
-must be derived from both `testing::Test` and `testing::WithParamInterface<T>`
-(the latter is a pure interface), where `T` is the type of your parameter
-values. For convenience, you can just derive the fixture class from
-`testing::TestWithParam<T>`, which itself is derived from both `testing::Test`
-and `testing::WithParamInterface<T>`. `T` can be any copyable type. If it's a
-raw pointer, you are responsible for managing the lifespan of the pointed
-values.
-
-NOTE: If your test fixture defines `SetUpTestSuite()` or `TearDownTestSuite()`
-they must be declared **public** rather than **protected** in order to use
-`TEST_P`.
-
-```c++
-class FooTest :
-    public testing::TestWithParam<const char*> {
-  // You can implement all the usual fixture class members here.
-  // To access the test parameter, call GetParam() from class
-  // TestWithParam<T>.
-};
-
-// Or, when you want to add parameters to a pre-existing fixture class:
-class BaseTest : public testing::Test {
-  ...
-};
-class BarTest : public BaseTest,
-                public testing::WithParamInterface<const char*> {
-  ...
-};
-```
-
-Then, use the `TEST_P` macro to define as many test patterns using this fixture
-as you want. The `_P` suffix is for "parameterized" or "pattern", whichever you
-prefer to think.
-
-```c++
-TEST_P(FooTest, DoesBlah) {
-  // Inside a test, access the test parameter with the GetParam() method
-  // of the TestWithParam<T> class:
-  EXPECT_TRUE(foo.Blah(GetParam()));
-  ...
-}
-
-TEST_P(FooTest, HasBlahBlah) {
-  ...
-}
-```
-
-Finally, you can use `INSTANTIATE_TEST_SUITE_P` to instantiate the test suite
-with any set of parameters you want. googletest defines a number of functions
-for generating test parameters. They return what we call (surprise!) *parameter
-generators*. Here is a summary of them, which are all in the `testing`
-namespace:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Parameter Generator                                                                       | Behavior                                                                                                          |
-| ----------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- |
-| `Range(begin, end [, step])`                                                              | Yields values `{begin, begin+step, begin+step+step, ...}`. The values do not include `end`. `step` defaults to 1. |
-| `Values(v1, v2, ..., vN)`                                                                 | Yields values `{v1, v2, ..., vN}`.                                                                                |
-| `ValuesIn(container)` and  `ValuesIn(begin,end)`                                          | Yields values from a C-style array, an  STL-style container, or an iterator range `[begin, end)`                  |
-| `Bool()`                                                                                  | Yields sequence `{false, true}`.                                                                                  |
-| `Combine(g1, g2, ..., gN)`                                                                | Yields all combinations (Cartesian product) as std\:\:tuples of the values generated by the `N` generators.       |
-
-<!-- mdformat on-->
-
-For more details, see the comments at the definitions of these functions.
-
-The following statement will instantiate tests from the `FooTest` test suite
-each with parameter values `"meeny"`, `"miny"`, and `"moe"`.
-
-```c++
-INSTANTIATE_TEST_SUITE_P(InstantiationName,
-                         FooTest,
-                         testing::Values("meeny", "miny", "moe"));
-```
-
-NOTE: The code above must be placed at global or namespace scope, not at
-function scope.
-
-NOTE: Don't forget this step! If you do your test will silently pass, but none
-of its suites will ever run!
-
-To distinguish different instances of the pattern (yes, you can instantiate it
-more than once), the first argument to `INSTANTIATE_TEST_SUITE_P` is a prefix
-that will be added to the actual test suite name. Remember to pick unique
-prefixes for different instantiations. The tests from the instantiation above
-will have these names:
-
-*   `InstantiationName/FooTest.DoesBlah/0` for `"meeny"`
-*   `InstantiationName/FooTest.DoesBlah/1` for `"miny"`
-*   `InstantiationName/FooTest.DoesBlah/2` for `"moe"`
-*   `InstantiationName/FooTest.HasBlahBlah/0` for `"meeny"`
-*   `InstantiationName/FooTest.HasBlahBlah/1` for `"miny"`
-*   `InstantiationName/FooTest.HasBlahBlah/2` for `"moe"`
-
-You can use these names in [`--gtest_filter`](#running-a-subset-of-the-tests).
-
-This statement will instantiate all tests from `FooTest` again, each with
-parameter values `"cat"` and `"dog"`:
-
-```c++
-const char* pets[] = {"cat", "dog"};
-INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest,
-                         testing::ValuesIn(pets));
-```
-
-The tests from the instantiation above will have these names:
-
-*   `AnotherInstantiationName/FooTest.DoesBlah/0` for `"cat"`
-*   `AnotherInstantiationName/FooTest.DoesBlah/1` for `"dog"`
-*   `AnotherInstantiationName/FooTest.HasBlahBlah/0` for `"cat"`
-*   `AnotherInstantiationName/FooTest.HasBlahBlah/1` for `"dog"`
-
-Please note that `INSTANTIATE_TEST_SUITE_P` will instantiate *all* tests in the
-given test suite, whether their definitions come before or *after* the
-`INSTANTIATE_TEST_SUITE_P` statement.
-
-You can see [sample7_unittest.cc] and [sample8_unittest.cc] for more examples.
-
-[sample7_unittest.cc]: ../samples/sample7_unittest.cc "Parameterized Test example"
-[sample8_unittest.cc]: ../samples/sample8_unittest.cc "Parameterized Test example with multiple parameters"
-
-### Creating Value-Parameterized Abstract Tests
-
-In the above, we define and instantiate `FooTest` in the *same* source file.
-Sometimes you may want to define value-parameterized tests in a library and let
-other people instantiate them later. This pattern is known as *abstract tests*.
-As an example of its application, when you are designing an interface you can
-write a standard suite of abstract tests (perhaps using a factory function as
-the test parameter) that all implementations of the interface are expected to
-pass. When someone implements the interface, they can instantiate your suite to
-get all the interface-conformance tests for free.
-
-To define abstract tests, you should organize your code like this:
-
-1.  Put the definition of the parameterized test fixture class (e.g. `FooTest`)
-    in a header file, say `foo_param_test.h`. Think of this as *declaring* your
-    abstract tests.
-2.  Put the `TEST_P` definitions in `foo_param_test.cc`, which includes
-    `foo_param_test.h`. Think of this as *implementing* your abstract tests.
-
-Once they are defined, you can instantiate them by including `foo_param_test.h`,
-invoking `INSTANTIATE_TEST_SUITE_P()`, and depending on the library target that
-contains `foo_param_test.cc`. You can instantiate the same abstract test suite
-multiple times, possibly in different source files.
-
-### Specifying Names for Value-Parameterized Test Parameters
-
-The optional last argument to `INSTANTIATE_TEST_SUITE_P()` allows the user to
-specify a function or functor that generates custom test name suffixes based on
-the test parameters. The function should accept one argument of type
-`testing::TestParamInfo<class ParamType>`, and return `std::string`.
-
-`testing::PrintToStringParamName` is a builtin test suffix generator that
-returns the value of `testing::PrintToString(GetParam())`. It does not work for
-`std::string` or C strings.
-
-NOTE: test names must be non-empty, unique, and may only contain ASCII
-alphanumeric characters. In particular, they
-[should not contain underscores](faq.md#why-should-test-suite-names-and-test-names-not-contain-underscore)
-
-```c++
-class MyTestSuite : public testing::TestWithParam<int> {};
-
-TEST_P(MyTestSuite, MyTest)
-{
-  std::cout << "Example Test Param: " << GetParam() << std::endl;
-}
-
-INSTANTIATE_TEST_SUITE_P(MyGroup, MyTestSuite, testing::Range(0, 10),
-                         testing::PrintToStringParamName());
-```
-
-Providing a custom functor allows for more control over test parameter name
-generation, especially for types where the automatic conversion does not
-generate helpful parameter names (e.g. strings as demonstrated above). The
-following example illustrates this for multiple parameters, an enumeration type
-and a string, and also demonstrates how to combine generators. It uses a lambda
-for conciseness:
-
-```c++
-enum class MyType { MY_FOO = 0, MY_BAR = 1 };
-
-class MyTestSuite : public testing::TestWithParam<std::tuple<MyType, string>> {
-};
-
-INSTANTIATE_TEST_SUITE_P(
-    MyGroup, MyTestSuite,
-    testing::Combine(
-        testing::Values(MyType::VALUE_0, MyType::VALUE_1),
-        testing::ValuesIn("", "")),
-    [](const testing::TestParamInfo<MyTestSuite::ParamType>& info) {
-      string name = absl::StrCat(
-          std::get<0>(info.param) == MY_FOO ? "Foo" : "Bar", "_",
-          std::get<1>(info.param));
-      absl::c_replace_if(name, [](char c) { return !std::isalnum(c); }, '_');
-      return name;
-    });
-```
-
-## Typed Tests
-
-Suppose you have multiple implementations of the same interface and want to make
-sure that all of them satisfy some common requirements. Or, you may have defined
-several types that are supposed to conform to the same "concept" and you want to
-verify it. In both cases, you want the same test logic repeated for different
-types.
-
-While you can write one `TEST` or `TEST_F` for each type you want to test (and
-you may even factor the test logic into a function template that you invoke from
-the `TEST`), it's tedious and doesn't scale: if you want `m` tests over `n`
-types, you'll end up writing `m*n` `TEST`s.
-
-*Typed tests* allow you to repeat the same test logic over a list of types. You
-only need to write the test logic once, although you must know the type list
-when writing typed tests. Here's how you do it:
-
-First, define a fixture class template. It should be parameterized by a type.
-Remember to derive it from `::testing::Test`:
-
-```c++
-template <typename T>
-class FooTest : public ::testing::Test {
- public:
-  ...
-  typedef std::list<T> List;
-  static T shared_;
-  T value_;
-};
-```
-
-Next, associate a list of types with the test suite, which will be repeated for
-each type in the list:
-
-```c++
-using MyTypes = ::testing::Types<char, int, unsigned int>;
-TYPED_TEST_SUITE(FooTest, MyTypes);
-```
-
-The type alias (`using` or `typedef`) is necessary for the `TYPED_TEST_SUITE`
-macro to parse correctly. Otherwise the compiler will think that each comma in
-the type list introduces a new macro argument.
-
-Then, use `TYPED_TEST()` instead of `TEST_F()` to define a typed test for this
-test suite. You can repeat this as many times as you want:
-
-```c++
-TYPED_TEST(FooTest, DoesBlah) {
-  // Inside a test, refer to the special name TypeParam to get the type
-  // parameter.  Since we are inside a derived class template, C++ requires
-  // us to visit the members of FooTest via 'this'.
-  TypeParam n = this->value_;
-
-  // To visit static members of the fixture, add the 'TestFixture::'
-  // prefix.
-  n += TestFixture::shared_;
-
-  // To refer to typedefs in the fixture, add the 'typename TestFixture::'
-  // prefix.  The 'typename' is required to satisfy the compiler.
-  typename TestFixture::List values;
-
-  values.push_back(n);
-  ...
-}
-
-TYPED_TEST(FooTest, HasPropertyA) { ... }
-```
-
-You can see [sample6_unittest.cc] for a complete example.
-
-[sample6_unittest.cc]: ../samples/sample6_unittest.cc "Typed Test example"
-
-## Type-Parameterized Tests
-
-*Type-parameterized tests* are like typed tests, except that they don't require
-you to know the list of types ahead of time. Instead, you can define the test
-logic first and instantiate it with different type lists later. You can even
-instantiate it more than once in the same program.
-
-If you are designing an interface or concept, you can define a suite of
-type-parameterized tests to verify properties that any valid implementation of
-the interface/concept should have. Then, the author of each implementation can
-just instantiate the test suite with their type to verify that it conforms to
-the requirements, without having to write similar tests repeatedly. Here's an
-example:
-
-First, define a fixture class template, as we did with typed tests:
-
-```c++
-template <typename T>
-class FooTest : public ::testing::Test {
-  ...
-};
-```
-
-Next, declare that you will define a type-parameterized test suite:
-
-```c++
-TYPED_TEST_SUITE_P(FooTest);
-```
-
-Then, use `TYPED_TEST_P()` to define a type-parameterized test. You can repeat
-this as many times as you want:
-
-```c++
-TYPED_TEST_P(FooTest, DoesBlah) {
-  // Inside a test, refer to TypeParam to get the type parameter.
-  TypeParam n = 0;
-  ...
-}
-
-TYPED_TEST_P(FooTest, HasPropertyA) { ... }
-```
-
-Now the tricky part: you need to register all test patterns using the
-`REGISTER_TYPED_TEST_SUITE_P` macro before you can instantiate them. The first
-argument of the macro is the test suite name; the rest are the names of the
-tests in this test suite:
-
-```c++
-REGISTER_TYPED_TEST_SUITE_P(FooTest,
-                            DoesBlah, HasPropertyA);
-```
-
-Finally, you are free to instantiate the pattern with the types you want. If you
-put the above code in a header file, you can `#include` it in multiple C++
-source files and instantiate it multiple times.
-
-```c++
-typedef ::testing::Types<char, int, unsigned int> MyTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
-```
-
-To distinguish different instances of the pattern, the first argument to the
-`INSTANTIATE_TYPED_TEST_SUITE_P` macro is a prefix that will be added to the
-actual test suite name. Remember to pick unique prefixes for different
-instances.
-
-In the special case where the type list contains only one type, you can write
-that type directly without `::testing::Types<...>`, like this:
-
-```c++
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
-```
-
-You can see [sample6_unittest.cc] for a complete example.
-
-## Testing Private Code
-
-If you change your software's internal implementation, your tests should not
-break as long as the change is not observable by users. Therefore, **per the
-black-box testing principle, most of the time you should test your code through
-its public interfaces.**
-
-**If you still find yourself needing to test internal implementation code,
-consider if there's a better design.** The desire to test internal
-implementation is often a sign that the class is doing too much. Consider
-extracting an implementation class, and testing it. Then use that implementation
-class in the original class.
-
-If you absolutely have to test non-public interface code though, you can. There
-are two cases to consider:
-
-*   Static functions ( *not* the same as static member functions!) or unnamed
-    namespaces, and
-*   Private or protected class members
-
-To test them, we use the following special techniques:
-
-*   Both static functions and definitions/declarations in an unnamed namespace
-    are only visible within the same translation unit. To test them, you can
-    `#include` the entire `.cc` file being tested in your `*_test.cc` file.
-    (#including `.cc` files is not a good way to reuse code - you should not do
-    this in production code!)
-
-    However, a better approach is to move the private code into the
-    `foo::internal` namespace, where `foo` is the namespace your project
-    normally uses, and put the private declarations in a `*-internal.h` file.
-    Your production `.cc` files and your tests are allowed to include this
-    internal header, but your clients are not. This way, you can fully test your
-    internal implementation without leaking it to your clients.
-
-*   Private class members are only accessible from within the class or by
-    friends. To access a class' private members, you can declare your test
-    fixture as a friend to the class and define accessors in your fixture. Tests
-    using the fixture can then access the private members of your production
-    class via the accessors in the fixture. Note that even though your fixture
-    is a friend to your production class, your tests are not automatically
-    friends to it, as they are technically defined in sub-classes of the
-    fixture.
-
-    Another way to test private members is to refactor them into an
-    implementation class, which is then declared in a `*-internal.h` file. Your
-    clients aren't allowed to include this header but your tests can. Such is
-    called the
-    [Pimpl](https://www.gamedev.net/articles/programming/general-and-gameplay-programming/the-c-pimpl-r1794/)
-    (Private Implementation) idiom.
-
-    Or, you can declare an individual test as a friend of your class by adding
-    this line in the class body:
-
-    ```c++
-        FRIEND_TEST(TestSuiteName, TestName);
-    ```
-
-    For example,
-
-    ```c++
-    // foo.h
-    class Foo {
-      ...
-     private:
-      FRIEND_TEST(FooTest, BarReturnsZeroOnNull);
-
-      int Bar(void* x);
-    };
-
-    // foo_test.cc
-    ...
-    TEST(FooTest, BarReturnsZeroOnNull) {
-      Foo foo;
-      EXPECT_EQ(foo.Bar(NULL), 0);  // Uses Foo's private member Bar().
-    }
-    ```
-
-    Pay special attention when your class is defined in a namespace, as you
-    should define your test fixtures and tests in the same namespace if you want
-    them to be friends of your class. For example, if the code to be tested
-    looks like:
-
-    ```c++
-    namespace my_namespace {
-
-    class Foo {
-      friend class FooTest;
-      FRIEND_TEST(FooTest, Bar);
-      FRIEND_TEST(FooTest, Baz);
-      ... definition of the class Foo ...
-    };
-
-    }  // namespace my_namespace
-    ```
-
-    Your test code should be something like:
-
-    ```c++
-    namespace my_namespace {
-
-    class FooTest : public ::testing::Test {
-     protected:
-      ...
-    };
-
-    TEST_F(FooTest, Bar) { ... }
-    TEST_F(FooTest, Baz) { ... }
-
-    }  // namespace my_namespace
-    ```
-
-## "Catching" Failures
-
-If you are building a testing utility on top of googletest, you'll want to test
-your utility. What framework would you use to test it? googletest, of course.
-
-The challenge is to verify that your testing utility reports failures correctly.
-In frameworks that report a failure by throwing an exception, you could catch
-the exception and assert on it. But googletest doesn't use exceptions, so how do
-we test that a piece of code generates an expected failure?
-
-gunit-spi.h contains some constructs to do this. After #including this header,
-you can use
-
-```c++
-  EXPECT_FATAL_FAILURE(statement, substring);
-```
-
-to assert that `statement` generates a fatal (e.g. `ASSERT_*`) failure in the
-current thread whose message contains the given `substring`, or use
-
-```c++
-  EXPECT_NONFATAL_FAILURE(statement, substring);
-```
-
-if you are expecting a non-fatal (e.g. `EXPECT_*`) failure.
-
-Only failures in the current thread are checked to determine the result of this
-type of expectations. If `statement` creates new threads, failures in these
-threads are also ignored. If you want to catch failures in other threads as
-well, use one of the following macros instead:
-
-```c++
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substring);
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substring);
-```
-
-NOTE: Assertions from multiple threads are currently not supported on Windows.
-
-For technical reasons, there are some caveats:
-
-1.  You cannot stream a failure message to either macro.
-
-2.  `statement` in `EXPECT_FATAL_FAILURE{_ON_ALL_THREADS}()` cannot reference
-    local non-static variables or non-static members of `this` object.
-
-3.  `statement` in `EXPECT_FATAL_FAILURE{_ON_ALL_THREADS}()` cannot return a
-    value.
-
-## Registering tests programmatically
-
-The `TEST` macros handle the vast majority of all use cases, but there are few
-were runtime registration logic is required. For those cases, the framework
-provides the `::testing::RegisterTest` that allows callers to register arbitrary
-tests dynamically.
-
-This is an advanced API only to be used when the `TEST` macros are insufficient.
-The macros should be preferred when possible, as they avoid most of the
-complexity of calling this function.
-
-It provides the following signature:
-
-```c++
-template <typename Factory>
-TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
-                       const char* type_param, const char* value_param,
-                       const char* file, int line, Factory factory);
-```
-
-The `factory` argument is a factory callable (move-constructible) object or
-function pointer that creates a new instance of the Test object. It handles
-ownership to the caller. The signature of the callable is `Fixture*()`, where
-`Fixture` is the test fixture class for the test. All tests registered with the
-same `test_suite_name` must return the same fixture type. This is checked at
-runtime.
-
-The framework will infer the fixture class from the factory and will call the
-`SetUpTestSuite` and `TearDownTestSuite` for it.
-
-Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
-undefined.
-
-Use case example:
-
-```c++
-class MyFixture : public ::testing::Test {
- public:
-  // All of these optional, just like in regular macro usage.
-  static void SetUpTestSuite() { ... }
-  static void TearDownTestSuite() { ... }
-  void SetUp() override { ... }
-  void TearDown() override { ... }
-};
-
-class MyTest : public MyFixture {
- public:
-  explicit MyTest(int data) : data_(data) {}
-  void TestBody() override { ... }
-
- private:
-  int data_;
-};
-
-void RegisterMyTests(const std::vector<int>& values) {
-  for (int v : values) {
-    ::testing::RegisterTest(
-        "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
-        std::to_string(v).c_str(),
-        __FILE__, __LINE__,
-        // Important to use the fixture type as the return type here.
-        [=]() -> MyFixture* { return new MyTest(v); });
-  }
-}
-...
-int main(int argc, char** argv) {
-  std::vector<int> values_to_test = LoadValuesFromConfig();
-  RegisterMyTests(values_to_test);
-  ...
-  return RUN_ALL_TESTS();
-}
-```
-## Getting the Current Test's Name
-
-Sometimes a function may need to know the name of the currently running test.
-For example, you may be using the `SetUp()` method of your test fixture to set
-the golden file name based on which test is running. The `::testing::TestInfo`
-class has this information:
-
-```c++
-namespace testing {
-
-class TestInfo {
- public:
-  // Returns the test suite name and the test name, respectively.
-  //
-  // Do NOT delete or free the return value - it's managed by the
-  // TestInfo class.
-  const char* test_suite_name() const;
-  const char* name() const;
-};
-
-}
-```
-
-To obtain a `TestInfo` object for the currently running test, call
-`current_test_info()` on the `UnitTest` singleton object:
-
-```c++
-  // Gets information about the currently running test.
-  // Do NOT delete the returned object - it's managed by the UnitTest class.
-  const ::testing::TestInfo* const test_info =
-    ::testing::UnitTest::GetInstance()->current_test_info();
-
-
-
-  printf("We are in test %s of test suite %s.\n",
-         test_info->name(),
-         test_info->test_suite_name());
-```
-
-`current_test_info()` returns a null pointer if no test is running. In
-particular, you cannot find the test suite name in `TestSuiteSetUp()`,
-`TestSuiteTearDown()` (where you know the test suite name implicitly), or
-functions called from them.
-
-## Extending googletest by Handling Test Events
-
-googletest provides an **event listener API** to let you receive notifications
-about the progress of a test program and test failures. The events you can
-listen to include the start and end of the test program, a test suite, or a test
-method, among others. You may use this API to augment or replace the standard
-console output, replace the XML output, or provide a completely different form
-of output, such as a GUI or a database. You can also use test events as
-checkpoints to implement a resource leak checker, for example.
-
-### Defining Event Listeners
-
-To define a event listener, you subclass either testing::TestEventListener or
-testing::EmptyTestEventListener The former is an (abstract) interface, where
-*each pure virtual method can be overridden to handle a test event* (For
-example, when a test starts, the `OnTestStart()` method will be called.). The
-latter provides an empty implementation of all methods in the interface, such
-that a subclass only needs to override the methods it cares about.
-
-When an event is fired, its context is passed to the handler function as an
-argument. The following argument types are used:
-
-*   UnitTest reflects the state of the entire test program,
-*   TestSuite has information about a test suite, which can contain one or more
-    tests,
-*   TestInfo contains the state of a test, and
-*   TestPartResult represents the result of a test assertion.
-
-An event handler function can examine the argument it receives to find out
-interesting information about the event and the test program's state.
-
-Here's an example:
-
-```c++
-  class MinimalistPrinter : public ::testing::EmptyTestEventListener {
-    // Called before a test starts.
-    virtual void OnTestStart(const ::testing::TestInfo& test_info) {
-      printf("*** Test %s.%s starting.\n",
-             test_info.test_suite_name(), test_info.name());
-    }
-
-    // Called after a failed assertion or a SUCCESS().
-    virtual void OnTestPartResult(const ::testing::TestPartResult& test_part_result) {
-      printf("%s in %s:%d\n%s\n",
-             test_part_result.failed() ? "*** Failure" : "Success",
-             test_part_result.file_name(),
-             test_part_result.line_number(),
-             test_part_result.summary());
-    }
-
-    // Called after a test ends.
-    virtual void OnTestEnd(const ::testing::TestInfo& test_info) {
-      printf("*** Test %s.%s ending.\n",
-             test_info.test_suite_name(), test_info.name());
-    }
-  };
-```
-
-### Using Event Listeners
-
-To use the event listener you have defined, add an instance of it to the
-googletest event listener list (represented by class TestEventListeners - note
-the "s" at the end of the name) in your `main()` function, before calling
-`RUN_ALL_TESTS()`:
-
-```c++
-int main(int argc, char** argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-  // Gets hold of the event listener list.
-  ::testing::TestEventListeners& listeners =
-        ::testing::UnitTest::GetInstance()->listeners();
-  // Adds a listener to the end.  googletest takes the ownership.
-  listeners.Append(new MinimalistPrinter);
-  return RUN_ALL_TESTS();
-}
-```
-
-There's only one problem: the default test result printer is still in effect, so
-its output will mingle with the output from your minimalist printer. To suppress
-the default printer, just release it from the event listener list and delete it.
-You can do so by adding one line:
-
-```c++
-  ...
-  delete listeners.Release(listeners.default_result_printer());
-  listeners.Append(new MinimalistPrinter);
-  return RUN_ALL_TESTS();
-```
-
-Now, sit back and enjoy a completely different output from your tests. For more
-details, see [sample9_unittest.cc].
-
-[sample9_unittest.cc]: ../samples/sample9_unittest.cc "Event listener example"
-
-You may append more than one listener to the list. When an `On*Start()` or
-`OnTestPartResult()` event is fired, the listeners will receive it in the order
-they appear in the list (since new listeners are added to the end of the list,
-the default text printer and the default XML generator will receive the event
-first). An `On*End()` event will be received by the listeners in the *reverse*
-order. This allows output by listeners added later to be framed by output from
-listeners added earlier.
-
-### Generating Failures in Listeners
-
-You may use failure-raising macros (`EXPECT_*()`, `ASSERT_*()`, `FAIL()`, etc)
-when processing an event. There are some restrictions:
-
-1.  You cannot generate any failure in `OnTestPartResult()` (otherwise it will
-    cause `OnTestPartResult()` to be called recursively).
-2.  A listener that handles `OnTestPartResult()` is not allowed to generate any
-    failure.
-
-When you add listeners to the listener list, you should put listeners that
-handle `OnTestPartResult()` *before* listeners that can generate failures. This
-ensures that failures generated by the latter are attributed to the right test
-by the former.
-
-See [sample10_unittest.cc] for an example of a failure-raising listener.
-
-[sample10_unittest.cc]: ../samples/sample10_unittest.cc "Failure-raising listener example"
-
-## Running Test Programs: Advanced Options
-
-googletest test programs are ordinary executables. Once built, you can run them
-directly and affect their behavior via the following environment variables
-and/or command line flags. For the flags to work, your programs must call
-`::testing::InitGoogleTest()` before calling `RUN_ALL_TESTS()`.
-
-To see a list of supported flags and their usage, please run your test program
-with the `--help` flag. You can also use `-h`, `-?`, or `/?` for short.
-
-If an option is specified both by an environment variable and by a flag, the
-latter takes precedence.
-
-### Selecting Tests
-
-#### Listing Test Names
-
-Sometimes it is necessary to list the available tests in a program before
-running them so that a filter may be applied if needed. Including the flag
-`--gtest_list_tests` overrides all other flags and lists tests in the following
-format:
-
-```none
-TestSuite1.
-  TestName1
-  TestName2
-TestSuite2.
-  TestName
-```
-
-None of the tests listed are actually run if the flag is provided. There is no
-corresponding environment variable for this flag.
-
-#### Running a Subset of the Tests
-
-By default, a googletest program runs all tests the user has defined. Sometimes,
-you want to run only a subset of the tests (e.g. for debugging or quickly
-verifying a change). If you set the `GTEST_FILTER` environment variable or the
-`--gtest_filter` flag to a filter string, googletest will only run the tests
-whose full names (in the form of `TestSuiteName.TestName`) match the filter.
-
-The format of a filter is a '`:`'-separated list of wildcard patterns (called
-the *positive patterns*) optionally followed by a '`-`' and another
-'`:`'-separated pattern list (called the *negative patterns*). A test matches
-the filter if and only if it matches any of the positive patterns but does not
-match any of the negative patterns.
-
-A pattern may contain `'*'` (matches any string) or `'?'` (matches any single
-character). For convenience, the filter `'*-NegativePatterns'` can be also
-written as `'-NegativePatterns'`.
-
-For example:
-
-*   `./foo_test` Has no flag, and thus runs all its tests.
-*   `./foo_test --gtest_filter=*` Also runs everything, due to the single
-    match-everything `*` value.
-*   `./foo_test --gtest_filter=FooTest.*` Runs everything in test suite
-    `FooTest` .
-*   `./foo_test --gtest_filter=*Null*:*Constructor*` Runs any test whose full
-    name contains either `"Null"` or `"Constructor"` .
-*   `./foo_test --gtest_filter=-*DeathTest.*` Runs all non-death tests.
-*   `./foo_test --gtest_filter=FooTest.*-FooTest.Bar` Runs everything in test
-    suite `FooTest` except `FooTest.Bar`.
-*   `./foo_test --gtest_filter=FooTest.*:BarTest.*-FooTest.Bar:BarTest.Foo` Runs
-    everything in test suite `FooTest` except `FooTest.Bar` and everything in
-    test suite `BarTest` except `BarTest.Foo`.
-
-#### Temporarily Disabling Tests
-
-If you have a broken test that you cannot fix right away, you can add the
-`DISABLED_` prefix to its name. This will exclude it from execution. This is
-better than commenting out the code or using `#if 0`, as disabled tests are
-still compiled (and thus won't rot).
-
-If you need to disable all tests in a test suite, you can either add `DISABLED_`
-to the front of the name of each test, or alternatively add it to the front of
-the test suite name.
-
-For example, the following tests won't be run by googletest, even though they
-will still be compiled:
-
-```c++
-// Tests that Foo does Abc.
-TEST(FooTest, DISABLED_DoesAbc) { ... }
-
-class DISABLED_BarTest : public ::testing::Test { ... };
-
-// Tests that Bar does Xyz.
-TEST_F(DISABLED_BarTest, DoesXyz) { ... }
-```
-
-NOTE: This feature should only be used for temporary pain-relief. You still have
-to fix the disabled tests at a later date. As a reminder, googletest will print
-a banner warning you if a test program contains any disabled tests.
-
-TIP: You can easily count the number of disabled tests you have using `gsearch`
-and/or `grep`. This number can be used as a metric for improving your test
-quality.
-
-#### Temporarily Enabling Disabled Tests
-
-To include disabled tests in test execution, just invoke the test program with
-the `--gtest_also_run_disabled_tests` flag or set the
-`GTEST_ALSO_RUN_DISABLED_TESTS` environment variable to a value other than `0`.
-You can combine this with the `--gtest_filter` flag to further select which
-disabled tests to run.
-
-### Repeating the Tests
-
-Once in a while you'll run into a test whose result is hit-or-miss. Perhaps it
-will fail only 1% of the time, making it rather hard to reproduce the bug under
-a debugger. This can be a major source of frustration.
-
-The `--gtest_repeat` flag allows you to repeat all (or selected) test methods in
-a program many times. Hopefully, a flaky test will eventually fail and give you
-a chance to debug. Here's how to use it:
-
-```none
-$ foo_test --gtest_repeat=1000
-Repeat foo_test 1000 times and don't stop at failures.
-
-$ foo_test --gtest_repeat=-1
-A negative count means repeating forever.
-
-$ foo_test --gtest_repeat=1000 --gtest_break_on_failure
-Repeat foo_test 1000 times, stopping at the first failure.  This
-is especially useful when running under a debugger: when the test
-fails, it will drop into the debugger and you can then inspect
-variables and stacks.
-
-$ foo_test --gtest_repeat=1000 --gtest_filter=FooBar.*
-Repeat the tests whose name matches the filter 1000 times.
-```
-
-If your test program contains
-[global set-up/tear-down](#global-set-up-and-tear-down) code, it will be
-repeated in each iteration as well, as the flakiness may be in it. You can also
-specify the repeat count by setting the `GTEST_REPEAT` environment variable.
-
-### Shuffling the Tests
-
-You can specify the `--gtest_shuffle` flag (or set the `GTEST_SHUFFLE`
-environment variable to `1`) to run the tests in a program in a random order.
-This helps to reveal bad dependencies between tests.
-
-By default, googletest uses a random seed calculated from the current time.
-Therefore you'll get a different order every time. The console output includes
-the random seed value, such that you can reproduce an order-related test failure
-later. To specify the random seed explicitly, use the `--gtest_random_seed=SEED`
-flag (or set the `GTEST_RANDOM_SEED` environment variable), where `SEED` is an
-integer in the range [0, 99999]. The seed value 0 is special: it tells
-googletest to do the default behavior of calculating the seed from the current
-time.
-
-If you combine this with `--gtest_repeat=N`, googletest will pick a different
-random seed and re-shuffle the tests in each iteration.
-
-### Controlling Test Output
-
-#### Colored Terminal Output
-
-googletest can use colors in its terminal output to make it easier to spot the
-important information:
-
-<code>
-...<br/>
-  <font color="green">[----------]</font><font color="black"> 1 test from
-  FooTest</font><br/>
-  <font color="green">[ RUN &nbsp; &nbsp; &nbsp;]</font><font color="black">
-  FooTest.DoesAbc</font><br/>
-  <font color="green">[ &nbsp; &nbsp; &nbsp; OK ]</font><font color="black">
-  FooTest.DoesAbc </font><br/>
-  <font color="green">[----------]</font><font color="black">
-  2 tests from BarTest</font><br/>
-  <font color="green">[ RUN &nbsp; &nbsp; &nbsp;]</font><font color="black">
-  BarTest.HasXyzProperty </font><br/>
-  <font color="green">[ &nbsp; &nbsp; &nbsp; OK ]</font><font color="black">
-  BarTest.HasXyzProperty</font><br/>
-  <font color="green">[ RUN &nbsp; &nbsp; &nbsp;]</font><font color="black">
-  BarTest.ReturnsTrueOnSuccess ... some error messages ...</font><br/>
-  <font color="red">[ &nbsp; FAILED ]</font><font color="black">
-  BarTest.ReturnsTrueOnSuccess ...</font><br/>
-  <font color="green">[==========]</font><font color="black">
-  30 tests from 14 test suites ran.</font><br/>
-  <font color="green">[ &nbsp; PASSED ]</font><font color="black">
-  28 tests.</font><br/>
-  <font color="red">[ &nbsp; FAILED ]</font><font color="black">
-  2 tests, listed below:</font><br/>
-  <font color="red">[ &nbsp; FAILED ]</font><font color="black">
-  BarTest.ReturnsTrueOnSuccess</font><br/>
-  <font color="red">[ &nbsp; FAILED ]</font><font color="black">
-  AnotherTest.DoesXyz<br/>
-<br/>
-  2 FAILED TESTS
-  </font>
-</code>
-
-You can set the `GTEST_COLOR` environment variable or the `--gtest_color`
-command line flag to `yes`, `no`, or `auto` (the default) to enable colors,
-disable colors, or let googletest decide. When the value is `auto`, googletest
-will use colors if and only if the output goes to a terminal and (on non-Windows
-platforms) the `TERM` environment variable is set to `xterm` or `xterm-color`.
-
-#### Suppressing the Elapsed Time
-
-By default, googletest prints the time it takes to run each test. To disable
-that, run the test program with the `--gtest_print_time=0` command line flag, or
-set the GTEST_PRINT_TIME environment variable to `0`.
-
-#### Suppressing UTF-8 Text Output
-
-In case of assertion failures, googletest prints expected and actual values of
-type `string` both as hex-encoded strings as well as in readable UTF-8 text if
-they contain valid non-ASCII UTF-8 characters. If you want to suppress the UTF-8
-text because, for example, you don't have an UTF-8 compatible output medium, run
-the test program with `--gtest_print_utf8=0` or set the `GTEST_PRINT_UTF8`
-environment variable to `0`.
-
-
-
-#### Generating an XML Report
-
-googletest can emit a detailed XML report to a file in addition to its normal
-textual output. The report contains the duration of each test, and thus can help
-you identify slow tests. The report is also used by the http://unittest
-dashboard to show per-test-method error messages.
-
-To generate the XML report, set the `GTEST_OUTPUT` environment variable or the
-`--gtest_output` flag to the string `"xml:path_to_output_file"`, which will
-create the file at the given location. You can also just use the string `"xml"`,
-in which case the output can be found in the `test_detail.xml` file in the
-current directory.
-
-If you specify a directory (for example, `"xml:output/directory/"` on Linux or
-`"xml:output\directory\"` on Windows), googletest will create the XML file in
-that directory, named after the test executable (e.g. `foo_test.xml` for test
-program `foo_test` or `foo_test.exe`). If the file already exists (perhaps left
-over from a previous run), googletest will pick a different name (e.g.
-`foo_test_1.xml`) to avoid overwriting it.
-
-The report is based on the `junitreport` Ant task. Since that format was
-originally intended for Java, a little interpretation is required to make it
-apply to googletest tests, as shown here:
-
-```xml
-<testsuites name="AllTests" ...>
-  <testsuite name="test_case_name" ...>
-    <testcase    name="test_name" ...>
-      <failure message="..."/>
-      <failure message="..."/>
-      <failure message="..."/>
-    </testcase>
-  </testsuite>
-</testsuites>
-```
-
-*   The root `<testsuites>` element corresponds to the entire test program.
-*   `<testsuite>` elements correspond to googletest test suites.
-*   `<testcase>` elements correspond to googletest test functions.
-
-For instance, the following program
-
-```c++
-TEST(MathTest, Addition) { ... }
-TEST(MathTest, Subtraction) { ... }
-TEST(LogicTest, NonContradiction) { ... }
-```
-
-could generate this report:
-
-```xml
-<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="3" failures="1" errors="0" time="0.035" timestamp="2011-10-31T18:52:42" name="AllTests">
-  <testsuite name="MathTest" tests="2" failures="1" errors="0" time="0.015">
-    <testcase name="Addition" status="run" time="0.007" classname="">
-      <failure message="Value of: add(1, 1)&#x0A;  Actual: 3&#x0A;Expected: 2" type="">...</failure>
-      <failure message="Value of: add(1, -1)&#x0A;  Actual: 1&#x0A;Expected: 0" type="">...</failure>
-    </testcase>
-    <testcase name="Subtraction" status="run" time="0.005" classname="">
-    </testcase>
-  </testsuite>
-  <testsuite name="LogicTest" tests="1" failures="0" errors="0" time="0.005">
-    <testcase name="NonContradiction" status="run" time="0.005" classname="">
-    </testcase>
-  </testsuite>
-</testsuites>
-```
-
-Things to note:
-
-*   The `tests` attribute of a `<testsuites>` or `<testsuite>` element tells how
-    many test functions the googletest program or test suite contains, while the
-    `failures` attribute tells how many of them failed.
-
-*   The `time` attribute expresses the duration of the test, test suite, or
-    entire test program in seconds.
-
-*   The `timestamp` attribute records the local date and time of the test
-    execution.
-
-*   Each `<failure>` element corresponds to a single failed googletest
-    assertion.
-
-#### Generating a JSON Report
-
-googletest can also emit a JSON report as an alternative format to XML. To
-generate the JSON report, set the `GTEST_OUTPUT` environment variable or the
-`--gtest_output` flag to the string `"json:path_to_output_file"`, which will
-create the file at the given location. You can also just use the string
-`"json"`, in which case the output can be found in the `test_detail.json` file
-in the current directory.
-
-The report format conforms to the following JSON Schema:
-
-```json
-{
-  "$schema": "http://json-schema.org/schema#",
-  "type": "object",
-  "definitions": {
-    "TestCase": {
-      "type": "object",
-      "properties": {
-        "name": { "type": "string" },
-        "tests": { "type": "integer" },
-        "failures": { "type": "integer" },
-        "disabled": { "type": "integer" },
-        "time": { "type": "string" },
-        "testsuite": {
-          "type": "array",
-          "items": {
-            "$ref": "#/definitions/TestInfo"
-          }
-        }
-      }
-    },
-    "TestInfo": {
-      "type": "object",
-      "properties": {
-        "name": { "type": "string" },
-        "status": {
-          "type": "string",
-          "enum": ["RUN", "NOTRUN"]
-        },
-        "time": { "type": "string" },
-        "classname": { "type": "string" },
-        "failures": {
-          "type": "array",
-          "items": {
-            "$ref": "#/definitions/Failure"
-          }
-        }
-      }
-    },
-    "Failure": {
-      "type": "object",
-      "properties": {
-        "failures": { "type": "string" },
-        "type": { "type": "string" }
-      }
-    }
-  },
-  "properties": {
-    "tests": { "type": "integer" },
-    "failures": { "type": "integer" },
-    "disabled": { "type": "integer" },
-    "errors": { "type": "integer" },
-    "timestamp": {
-      "type": "string",
-      "format": "date-time"
-    },
-    "time": { "type": "string" },
-    "name": { "type": "string" },
-    "testsuites": {
-      "type": "array",
-      "items": {
-        "$ref": "#/definitions/TestCase"
-      }
-    }
-  }
-}
-```
-
-The report uses the format that conforms to the following Proto3 using the
-[JSON encoding](https://developers.google.com/protocol-buffers/docs/proto3#json):
-
-```proto
-syntax = "proto3";
-
-package googletest;
-
-import "google/protobuf/timestamp.proto";
-import "google/protobuf/duration.proto";
-
-message UnitTest {
-  int32 tests = 1;
-  int32 failures = 2;
-  int32 disabled = 3;
-  int32 errors = 4;
-  google.protobuf.Timestamp timestamp = 5;
-  google.protobuf.Duration time = 6;
-  string name = 7;
-  repeated TestCase testsuites = 8;
-}
-
-message TestCase {
-  string name = 1;
-  int32 tests = 2;
-  int32 failures = 3;
-  int32 disabled = 4;
-  int32 errors = 5;
-  google.protobuf.Duration time = 6;
-  repeated TestInfo testsuite = 7;
-}
-
-message TestInfo {
-  string name = 1;
-  enum Status {
-    RUN = 0;
-    NOTRUN = 1;
-  }
-  Status status = 2;
-  google.protobuf.Duration time = 3;
-  string classname = 4;
-  message Failure {
-    string failures = 1;
-    string type = 2;
-  }
-  repeated Failure failures = 5;
-}
-```
-
-For instance, the following program
-
-```c++
-TEST(MathTest, Addition) { ... }
-TEST(MathTest, Subtraction) { ... }
-TEST(LogicTest, NonContradiction) { ... }
-```
-
-could generate this report:
-
-```json
-{
-  "tests": 3,
-  "failures": 1,
-  "errors": 0,
-  "time": "0.035s",
-  "timestamp": "2011-10-31T18:52:42Z",
-  "name": "AllTests",
-  "testsuites": [
-    {
-      "name": "MathTest",
-      "tests": 2,
-      "failures": 1,
-      "errors": 0,
-      "time": "0.015s",
-      "testsuite": [
-        {
-          "name": "Addition",
-          "status": "RUN",
-          "time": "0.007s",
-          "classname": "",
-          "failures": [
-            {
-              "message": "Value of: add(1, 1)\n  Actual: 3\nExpected: 2",
-              "type": ""
-            },
-            {
-              "message": "Value of: add(1, -1)\n  Actual: 1\nExpected: 0",
-              "type": ""
-            }
-          ]
-        },
-        {
-          "name": "Subtraction",
-          "status": "RUN",
-          "time": "0.005s",
-          "classname": ""
-        }
-      ]
-    },
-    {
-      "name": "LogicTest",
-      "tests": 1,
-      "failures": 0,
-      "errors": 0,
-      "time": "0.005s",
-      "testsuite": [
-        {
-          "name": "NonContradiction",
-          "status": "RUN",
-          "time": "0.005s",
-          "classname": ""
-        }
-      ]
-    }
-  ]
-}
-```
-
-IMPORTANT: The exact format of the JSON document is subject to change.
-
-### Controlling How Failures Are Reported
-
-#### Turning Assertion Failures into Break-Points
-
-When running test programs under a debugger, it's very convenient if the
-debugger can catch an assertion failure and automatically drop into interactive
-mode. googletest's *break-on-failure* mode supports this behavior.
-
-To enable it, set the `GTEST_BREAK_ON_FAILURE` environment variable to a value
-other than `0`. Alternatively, you can use the `--gtest_break_on_failure`
-command line flag.
-
-#### Disabling Catching Test-Thrown Exceptions
-
-googletest can be used either with or without exceptions enabled. If a test
-throws a C++ exception or (on Windows) a structured exception (SEH), by default
-googletest catches it, reports it as a test failure, and continues with the next
-test method. This maximizes the coverage of a test run. Also, on Windows an
-uncaught exception will cause a pop-up window, so catching the exceptions allows
-you to run the tests automatically.
-
-When debugging the test failures, however, you may instead want the exceptions
-to be handled by the debugger, such that you can examine the call stack when an
-exception is thrown. To achieve that, set the `GTEST_CATCH_EXCEPTIONS`
-environment variable to `0`, or use the `--gtest_catch_exceptions=0` flag when
-running the tests.
diff --git a/3rdparty/gtest/docs/faq.md b/3rdparty/gtest/docs/faq.md
deleted file mode 100644
index 960a8279..00000000
--- a/3rdparty/gtest/docs/faq.md
+++ /dev/null
@@ -1,753 +0,0 @@
-# Googletest FAQ
-
-<!-- GOOGLETEST_CM0014 DO NOT DELETE -->
-
-## Why should test suite names and test names not contain underscore?
-
-Underscore (`_`) is special, as C++ reserves the following to be used by the
-compiler and the standard library:
-
-1.  any identifier that starts with an `_` followed by an upper-case letter, and
-2.  any identifier that contains two consecutive underscores (i.e. `__`)
-    *anywhere* in its name.
-
-User code is *prohibited* from using such identifiers.
-
-Now let's look at what this means for `TEST` and `TEST_F`.
-
-Currently `TEST(TestSuiteName, TestName)` generates a class named
-`TestSuiteName_TestName_Test`. What happens if `TestSuiteName` or `TestName`
-contains `_`?
-
-1.  If `TestSuiteName` starts with an `_` followed by an upper-case letter (say,
-    `_Foo`), we end up with `_Foo_TestName_Test`, which is reserved and thus
-    invalid.
-2.  If `TestSuiteName` ends with an `_` (say, `Foo_`), we get
-    `Foo__TestName_Test`, which is invalid.
-3.  If `TestName` starts with an `_` (say, `_Bar`), we get
-    `TestSuiteName__Bar_Test`, which is invalid.
-4.  If `TestName` ends with an `_` (say, `Bar_`), we get
-    `TestSuiteName_Bar__Test`, which is invalid.
-
-So clearly `TestSuiteName` and `TestName` cannot start or end with `_`
-(Actually, `TestSuiteName` can start with `_` -- as long as the `_` isn't
-followed by an upper-case letter. But that's getting complicated. So for
-simplicity we just say that it cannot start with `_`.).
-
-It may seem fine for `TestSuiteName` and `TestName` to contain `_` in the
-middle. However, consider this:
-
-```c++
-TEST(Time, Flies_Like_An_Arrow) { ... }
-TEST(Time_Flies, Like_An_Arrow) { ... }
-```
-
-Now, the two `TEST`s will both generate the same class
-(`Time_Flies_Like_An_Arrow_Test`). That's not good.
-
-So for simplicity, we just ask the users to avoid `_` in `TestSuiteName` and
-`TestName`. The rule is more constraining than necessary, but it's simple and
-easy to remember. It also gives googletest some wiggle room in case its
-implementation needs to change in the future.
-
-If you violate the rule, there may not be immediate consequences, but your test
-may (just may) break with a new compiler (or a new version of the compiler you
-are using) or with a new version of googletest. Therefore it's best to follow
-the rule.
-
-## Why does googletest support `EXPECT_EQ(NULL, ptr)` and `ASSERT_EQ(NULL, ptr)` but not `EXPECT_NE(NULL, ptr)` and `ASSERT_NE(NULL, ptr)`?
-
-First of all you can use `EXPECT_NE(nullptr, ptr)` and `ASSERT_NE(nullptr,
-ptr)`. This is the preferred syntax in the style guide because nullptr does not
-have the type problems that NULL does. Which is why NULL does not work.
-
-Due to some peculiarity of C++, it requires some non-trivial template meta
-programming tricks to support using `NULL` as an argument of the `EXPECT_XX()`
-and `ASSERT_XX()` macros. Therefore we only do it where it's most needed
-(otherwise we make the implementation of googletest harder to maintain and more
-error-prone than necessary).
-
-The `EXPECT_EQ()` macro takes the *expected* value as its first argument and the
-*actual* value as the second. It's reasonable that someone wants to write
-`EXPECT_EQ(NULL, some_expression)`, and this indeed was requested several times.
-Therefore we implemented it.
-
-The need for `EXPECT_NE(NULL, ptr)` isn't nearly as strong. When the assertion
-fails, you already know that `ptr` must be `NULL`, so it doesn't add any
-information to print `ptr` in this case. That means `EXPECT_TRUE(ptr != NULL)`
-works just as well.
-
-If we were to support `EXPECT_NE(NULL, ptr)`, for consistency we'll have to
-support `EXPECT_NE(ptr, NULL)` as well, as unlike `EXPECT_EQ`, we don't have a
-convention on the order of the two arguments for `EXPECT_NE`. This means using
-the template meta programming tricks twice in the implementation, making it even
-harder to understand and maintain. We believe the benefit doesn't justify the
-cost.
-
-Finally, with the growth of the gMock matcher library, we are encouraging people
-to use the unified `EXPECT_THAT(value, matcher)` syntax more often in tests. One
-significant advantage of the matcher approach is that matchers can be easily
-combined to form new matchers, while the `EXPECT_NE`, etc, macros cannot be
-easily combined. Therefore we want to invest more in the matchers than in the
-`EXPECT_XX()` macros.
-
-## I need to test that different implementations of an interface satisfy some common requirements. Should I use typed tests or value-parameterized tests?
-
-For testing various implementations of the same interface, either typed tests or
-value-parameterized tests can get it done. It's really up to you the user to
-decide which is more convenient for you, depending on your particular case. Some
-rough guidelines:
-
-*   Typed tests can be easier to write if instances of the different
-    implementations can be created the same way, modulo the type. For example,
-    if all these implementations have a public default constructor (such that
-    you can write `new TypeParam`), or if their factory functions have the same
-    form (e.g. `CreateInstance<TypeParam>()`).
-*   Value-parameterized tests can be easier to write if you need different code
-    patterns to create different implementations' instances, e.g. `new Foo` vs
-    `new Bar(5)`. To accommodate for the differences, you can write factory
-    function wrappers and pass these function pointers to the tests as their
-    parameters.
-*   When a typed test fails, the default output includes the name of the type,
-    which can help you quickly identify which implementation is wrong.
-    Value-parameterized tests only show the number of the failed iteration by
-    default. You will need to define a function that returns the iteration name
-    and pass it as the third parameter to INSTANTIATE_TEST_SUITE_P to have more
-    useful output.
-*   When using typed tests, you need to make sure you are testing against the
-    interface type, not the concrete types (in other words, you want to make
-    sure `implicit_cast<MyInterface*>(my_concrete_impl)` works, not just that
-    `my_concrete_impl` works). It's less likely to make mistakes in this area
-    when using value-parameterized tests.
-
-I hope I didn't confuse you more. :-) If you don't mind, I'd suggest you to give
-both approaches a try. Practice is a much better way to grasp the subtle
-differences between the two tools. Once you have some concrete experience, you
-can much more easily decide which one to use the next time.
-
-## I got some run-time errors about invalid proto descriptors when using `ProtocolMessageEquals`. Help!
-
-**Note:** `ProtocolMessageEquals` and `ProtocolMessageEquiv` are *deprecated*
-now. Please use `EqualsProto`, etc instead.
-
-`ProtocolMessageEquals` and `ProtocolMessageEquiv` were redefined recently and
-are now less tolerant of invalid protocol buffer definitions. In particular, if
-you have a `foo.proto` that doesn't fully qualify the type of a protocol message
-it references (e.g. `message<Bar>` where it should be `message<blah.Bar>`), you
-will now get run-time errors like:
-
-```
-... descriptor.cc:...] Invalid proto descriptor for file "path/to/foo.proto":
-... descriptor.cc:...]  blah.MyMessage.my_field: ".Bar" is not defined.
-```
-
-If you see this, your `.proto` file is broken and needs to be fixed by making
-the types fully qualified. The new definition of `ProtocolMessageEquals` and
-`ProtocolMessageEquiv` just happen to reveal your bug.
-
-## My death test modifies some state, but the change seems lost after the death test finishes. Why?
-
-Death tests (`EXPECT_DEATH`, etc) are executed in a sub-process s.t. the
-expected crash won't kill the test program (i.e. the parent process). As a
-result, any in-memory side effects they incur are observable in their respective
-sub-processes, but not in the parent process. You can think of them as running
-in a parallel universe, more or less.
-
-In particular, if you use mocking and the death test statement invokes some mock
-methods, the parent process will think the calls have never occurred. Therefore,
-you may want to move your `EXPECT_CALL` statements inside the `EXPECT_DEATH`
-macro.
-
-## EXPECT_EQ(htonl(blah), blah_blah) generates weird compiler errors in opt mode. Is this a googletest bug?
-
-Actually, the bug is in `htonl()`.
-
-According to `'man htonl'`, `htonl()` is a *function*, which means it's valid to
-use `htonl` as a function pointer. However, in opt mode `htonl()` is defined as
-a *macro*, which breaks this usage.
-
-Worse, the macro definition of `htonl()` uses a `gcc` extension and is *not*
-standard C++. That hacky implementation has some ad hoc limitations. In
-particular, it prevents you from writing `Foo<sizeof(htonl(x))>()`, where `Foo`
-is a template that has an integral argument.
-
-The implementation of `EXPECT_EQ(a, b)` uses `sizeof(... a ...)` inside a
-template argument, and thus doesn't compile in opt mode when `a` contains a call
-to `htonl()`. It is difficult to make `EXPECT_EQ` bypass the `htonl()` bug, as
-the solution must work with different compilers on various platforms.
-
-`htonl()` has some other problems as described in `//util/endian/endian.h`,
-which defines `ghtonl()` to replace it. `ghtonl()` does the same thing `htonl()`
-does, only without its problems. We suggest you to use `ghtonl()` instead of
-`htonl()`, both in your tests and production code.
-
-`//util/endian/endian.h` also defines `ghtons()`, which solves similar problems
-in `htons()`.
-
-Don't forget to add `//util/endian` to the list of dependencies in the `BUILD`
-file wherever `ghtonl()` and `ghtons()` are used. The library consists of a
-single header file and will not bloat your binary.
-
-## The compiler complains about "undefined references" to some static const member variables, but I did define them in the class body. What's wrong?
-
-If your class has a static data member:
-
-```c++
-// foo.h
-class Foo {
-  ...
-  static const int kBar = 100;
-};
-```
-
-You also need to define it *outside* of the class body in `foo.cc`:
-
-```c++
-const int Foo::kBar;  // No initializer here.
-```
-
-Otherwise your code is **invalid C++**, and may break in unexpected ways. In
-particular, using it in googletest comparison assertions (`EXPECT_EQ`, etc) will
-generate an "undefined reference" linker error. The fact that "it used to work"
-doesn't mean it's valid. It just means that you were lucky. :-)
-
-## Can I derive a test fixture from another?
-
-Yes.
-
-Each test fixture has a corresponding and same named test suite. This means only
-one test suite can use a particular fixture. Sometimes, however, multiple test
-cases may want to use the same or slightly different fixtures. For example, you
-may want to make sure that all of a GUI library's test suites don't leak
-important system resources like fonts and brushes.
-
-In googletest, you share a fixture among test suites by putting the shared logic
-in a base test fixture, then deriving from that base a separate fixture for each
-test suite that wants to use this common logic. You then use `TEST_F()` to write
-tests using each derived fixture.
-
-Typically, your code looks like this:
-
-```c++
-// Defines a base test fixture.
-class BaseTest : public ::testing::Test {
- protected:
-  ...
-};
-
-// Derives a fixture FooTest from BaseTest.
-class FooTest : public BaseTest {
- protected:
-  void SetUp() override {
-    BaseTest::SetUp();  // Sets up the base fixture first.
-    ... additional set-up work ...
-  }
-
-  void TearDown() override {
-    ... clean-up work for FooTest ...
-    BaseTest::TearDown();  // Remember to tear down the base fixture
-                           // after cleaning up FooTest!
-  }
-
-  ... functions and variables for FooTest ...
-};
-
-// Tests that use the fixture FooTest.
-TEST_F(FooTest, Bar) { ... }
-TEST_F(FooTest, Baz) { ... }
-
-... additional fixtures derived from BaseTest ...
-```
-
-If necessary, you can continue to derive test fixtures from a derived fixture.
-googletest has no limit on how deep the hierarchy can be.
-
-For a complete example using derived test fixtures, see
-[sample5_unittest.cc](../samples/sample5_unittest.cc).
-
-## My compiler complains "void value not ignored as it ought to be." What does this mean?
-
-You're probably using an `ASSERT_*()` in a function that doesn't return `void`.
-`ASSERT_*()` can only be used in `void` functions, due to exceptions being
-disabled by our build system. Please see more details
-[here](advanced.md#assertion-placement).
-
-## My death test hangs (or seg-faults). How do I fix it?
-
-In googletest, death tests are run in a child process and the way they work is
-delicate. To write death tests you really need to understand how they work.
-Please make sure you have read [this](advanced.md#how-it-works).
-
-In particular, death tests don't like having multiple threads in the parent
-process. So the first thing you can try is to eliminate creating threads outside
-of `EXPECT_DEATH()`. For example, you may want to use mocks or fake objects
-instead of real ones in your tests.
-
-Sometimes this is impossible as some library you must use may be creating
-threads before `main()` is even reached. In this case, you can try to minimize
-the chance of conflicts by either moving as many activities as possible inside
-`EXPECT_DEATH()` (in the extreme case, you want to move everything inside), or
-leaving as few things as possible in it. Also, you can try to set the death test
-style to `"threadsafe"`, which is safer but slower, and see if it helps.
-
-If you go with thread-safe death tests, remember that they rerun the test
-program from the beginning in the child process. Therefore make sure your
-program can run side-by-side with itself and is deterministic.
-
-In the end, this boils down to good concurrent programming. You have to make
-sure that there is no race conditions or dead locks in your program. No silver
-bullet - sorry!
-
-## Should I use the constructor/destructor of the test fixture or SetUp()/TearDown()? {#CtorVsSetUp}
-
-The first thing to remember is that googletest does **not** reuse the same test
-fixture object across multiple tests. For each `TEST_F`, googletest will create
-a **fresh** test fixture object, immediately call `SetUp()`, run the test body,
-call `TearDown()`, and then delete the test fixture object.
-
-When you need to write per-test set-up and tear-down logic, you have the choice
-between using the test fixture constructor/destructor or `SetUp()/TearDown()`.
-The former is usually preferred, as it has the following benefits:
-
-*   By initializing a member variable in the constructor, we have the option to
-    make it `const`, which helps prevent accidental changes to its value and
-    makes the tests more obviously correct.
-*   In case we need to subclass the test fixture class, the subclass'
-    constructor is guaranteed to call the base class' constructor *first*, and
-    the subclass' destructor is guaranteed to call the base class' destructor
-    *afterward*. With `SetUp()/TearDown()`, a subclass may make the mistake of
-    forgetting to call the base class' `SetUp()/TearDown()` or call them at the
-    wrong time.
-
-You may still want to use `SetUp()/TearDown()` in the following cases:
-
-*   C++ does not allow virtual function calls in constructors and destructors.
-    You can call a method declared as virtual, but it will not use dynamic
-    dispatch, it will use the definition from the class the constructor of which
-    is currently executing. This is because calling a virtual method before the
-    derived class constructor has a chance to run is very dangerous - the
-    virtual method might operate on uninitialized data. Therefore, if you need
-    to call a method that will be overridden in a derived class, you have to use
-    `SetUp()/TearDown()`.
-*   In the body of a constructor (or destructor), it's not possible to use the
-    `ASSERT_xx` macros. Therefore, if the set-up operation could cause a fatal
-    test failure that should prevent the test from running, it's necessary to
-    use `abort` <!-- GOOGLETEST_CM0015 DO NOT DELETE --> and abort the whole test executable,
-    or to use `SetUp()` instead of a constructor.
-*   If the tear-down operation could throw an exception, you must use
-    `TearDown()` as opposed to the destructor, as throwing in a destructor leads
-    to undefined behavior and usually will kill your program right away. Note
-    that many standard libraries (like STL) may throw when exceptions are
-    enabled in the compiler. Therefore you should prefer `TearDown()` if you
-    want to write portable tests that work with or without exceptions.
-*   The googletest team is considering making the assertion macros throw on
-    platforms where exceptions are enabled (e.g. Windows, Mac OS, and Linux
-    client-side), which will eliminate the need for the user to propagate
-    failures from a subroutine to its caller. Therefore, you shouldn't use
-    googletest assertions in a destructor if your code could run on such a
-    platform.
-
-## The compiler complains "no matching function to call" when I use ASSERT_PRED*. How do I fix it?
-
-If the predicate function you use in `ASSERT_PRED*` or `EXPECT_PRED*` is
-overloaded or a template, the compiler will have trouble figuring out which
-overloaded version it should use. `ASSERT_PRED_FORMAT*` and
-`EXPECT_PRED_FORMAT*` don't have this problem.
-
-If you see this error, you might want to switch to
-`(ASSERT|EXPECT)_PRED_FORMAT*`, which will also give you a better failure
-message. If, however, that is not an option, you can resolve the problem by
-explicitly telling the compiler which version to pick.
-
-For example, suppose you have
-
-```c++
-bool IsPositive(int n) {
-  return n > 0;
-}
-
-bool IsPositive(double x) {
-  return x > 0;
-}
-```
-
-you will get a compiler error if you write
-
-```c++
-EXPECT_PRED1(IsPositive, 5);
-```
-
-However, this will work:
-
-```c++
-EXPECT_PRED1(static_cast<bool (*)(int)>(IsPositive), 5);
-```
-
-(The stuff inside the angled brackets for the `static_cast` operator is the type
-of the function pointer for the `int`-version of `IsPositive()`.)
-
-As another example, when you have a template function
-
-```c++
-template <typename T>
-bool IsNegative(T x) {
-  return x < 0;
-}
-```
-
-you can use it in a predicate assertion like this:
-
-```c++
-ASSERT_PRED1(IsNegative<int>, -5);
-```
-
-Things are more interesting if your template has more than one parameters. The
-following won't compile:
-
-```c++
-ASSERT_PRED2(GreaterThan<int, int>, 5, 0);
-```
-
-as the C++ pre-processor thinks you are giving `ASSERT_PRED2` 4 arguments, which
-is one more than expected. The workaround is to wrap the predicate function in
-parentheses:
-
-```c++
-ASSERT_PRED2((GreaterThan<int, int>), 5, 0);
-```
-
-## My compiler complains about "ignoring return value" when I call RUN_ALL_TESTS(). Why?
-
-Some people had been ignoring the return value of `RUN_ALL_TESTS()`. That is,
-instead of
-
-```c++
-  return RUN_ALL_TESTS();
-```
-
-they write
-
-```c++
-  RUN_ALL_TESTS();
-```
-
-This is **wrong and dangerous**. The testing services needs to see the return
-value of `RUN_ALL_TESTS()` in order to determine if a test has passed. If your
-`main()` function ignores it, your test will be considered successful even if it
-has a googletest assertion failure. Very bad.
-
-We have decided to fix this (thanks to Michael Chastain for the idea). Now, your
-code will no longer be able to ignore `RUN_ALL_TESTS()` when compiled with
-`gcc`. If you do so, you'll get a compiler error.
-
-If you see the compiler complaining about you ignoring the return value of
-`RUN_ALL_TESTS()`, the fix is simple: just make sure its value is used as the
-return value of `main()`.
-
-But how could we introduce a change that breaks existing tests? Well, in this
-case, the code was already broken in the first place, so we didn't break it. :-)
-
-## My compiler complains that a constructor (or destructor) cannot return a value. What's going on?
-
-Due to a peculiarity of C++, in order to support the syntax for streaming
-messages to an `ASSERT_*`, e.g.
-
-```c++
-  ASSERT_EQ(1, Foo()) << "blah blah" << foo;
-```
-
-we had to give up using `ASSERT*` and `FAIL*` (but not `EXPECT*` and
-`ADD_FAILURE*`) in constructors and destructors. The workaround is to move the
-content of your constructor/destructor to a private void member function, or
-switch to `EXPECT_*()` if that works. This
-[section](advanced.md#assertion-placement) in the user's guide explains it.
-
-## My SetUp() function is not called. Why?
-
-C++ is case-sensitive. Did you spell it as `Setup()`?
-
-Similarly, sometimes people spell `SetUpTestSuite()` as `SetupTestSuite()` and
-wonder why it's never called.
-
-
-## I have several test suites which share the same test fixture logic, do I have to define a new test fixture class for each of them? This seems pretty tedious.
-
-You don't have to. Instead of
-
-```c++
-class FooTest : public BaseTest {};
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-class BarTest : public BaseTest {};
-
-TEST_F(BarTest, Abc) { ... }
-TEST_F(BarTest, Def) { ... }
-```
-
-you can simply `typedef` the test fixtures:
-
-```c++
-typedef BaseTest FooTest;
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-typedef BaseTest BarTest;
-
-TEST_F(BarTest, Abc) { ... }
-TEST_F(BarTest, Def) { ... }
-```
-
-## googletest output is buried in a whole bunch of LOG messages. What do I do?
-
-The googletest output is meant to be a concise and human-friendly report. If
-your test generates textual output itself, it will mix with the googletest
-output, making it hard to read. However, there is an easy solution to this
-problem.
-
-Since `LOG` messages go to stderr, we decided to let googletest output go to
-stdout. This way, you can easily separate the two using redirection. For
-example:
-
-```shell
-$ ./my_test > gtest_output.txt
-```
-
-## Why should I prefer test fixtures over global variables?
-
-There are several good reasons:
-
-1.  It's likely your test needs to change the states of its global variables.
-    This makes it difficult to keep side effects from escaping one test and
-    contaminating others, making debugging difficult. By using fixtures, each
-    test has a fresh set of variables that's different (but with the same
-    names). Thus, tests are kept independent of each other.
-2.  Global variables pollute the global namespace.
-3.  Test fixtures can be reused via subclassing, which cannot be done easily
-    with global variables. This is useful if many test suites have something in
-    common.
-
-## What can the statement argument in ASSERT_DEATH() be?
-
-`ASSERT_DEATH(*statement*, *regex*)` (or any death assertion macro) can be used
-wherever `*statement*` is valid. So basically `*statement*` can be any C++
-statement that makes sense in the current context. In particular, it can
-reference global and/or local variables, and can be:
-
-*   a simple function call (often the case),
-*   a complex expression, or
-*   a compound statement.
-
-Some examples are shown here:
-
-```c++
-// A death test can be a simple function call.
-TEST(MyDeathTest, FunctionCall) {
-  ASSERT_DEATH(Xyz(5), "Xyz failed");
-}
-
-// Or a complex expression that references variables and functions.
-TEST(MyDeathTest, ComplexExpression) {
-  const bool c = Condition();
-  ASSERT_DEATH((c ? Func1(0) : object2.Method("test")),
-               "(Func1|Method) failed");
-}
-
-// Death assertions can be used any where in a function.  In
-// particular, they can be inside a loop.
-TEST(MyDeathTest, InsideLoop) {
-  // Verifies that Foo(0), Foo(1), ..., and Foo(4) all die.
-  for (int i = 0; i < 5; i++) {
-    EXPECT_DEATH_M(Foo(i), "Foo has \\d+ errors",
-                   ::testing::Message() << "where i is " << i);
-  }
-}
-
-// A death assertion can contain a compound statement.
-TEST(MyDeathTest, CompoundStatement) {
-  // Verifies that at lease one of Bar(0), Bar(1), ..., and
-  // Bar(4) dies.
-  ASSERT_DEATH({
-    for (int i = 0; i < 5; i++) {
-      Bar(i);
-    }
-  },
-  "Bar has \\d+ errors");
-}
-```
-
-gtest-death-test_test.cc contains more examples if you are interested.
-
-## I have a fixture class `FooTest`, but `TEST_F(FooTest, Bar)` gives me error ``"no matching function for call to `FooTest::FooTest()'"``. Why?
-
-Googletest needs to be able to create objects of your test fixture class, so it
-must have a default constructor. Normally the compiler will define one for you.
-However, there are cases where you have to define your own:
-
-*   If you explicitly declare a non-default constructor for class `FooTest`
-    (`DISALLOW_EVIL_CONSTRUCTORS()` does this), then you need to define a
-    default constructor, even if it would be empty.
-*   If `FooTest` has a const non-static data member, then you have to define the
-    default constructor *and* initialize the const member in the initializer
-    list of the constructor. (Early versions of `gcc` doesn't force you to
-    initialize the const member. It's a bug that has been fixed in `gcc 4`.)
-
-## Why does ASSERT_DEATH complain about previous threads that were already joined?
-
-With the Linux pthread library, there is no turning back once you cross the line
-from single thread to multiple threads. The first time you create a thread, a
-manager thread is created in addition, so you get 3, not 2, threads. Later when
-the thread you create joins the main thread, the thread count decrements by 1,
-but the manager thread will never be killed, so you still have 2 threads, which
-means you cannot safely run a death test.
-
-The new NPTL thread library doesn't suffer from this problem, as it doesn't
-create a manager thread. However, if you don't control which machine your test
-runs on, you shouldn't depend on this.
-
-## Why does googletest require the entire test suite, instead of individual tests, to be named *DeathTest when it uses ASSERT_DEATH?
-
-googletest does not interleave tests from different test suites. That is, it
-runs all tests in one test suite first, and then runs all tests in the next test
-suite, and so on. googletest does this because it needs to set up a test suite
-before the first test in it is run, and tear it down afterwords. Splitting up
-the test case would require multiple set-up and tear-down processes, which is
-inefficient and makes the semantics unclean.
-
-If we were to determine the order of tests based on test name instead of test
-case name, then we would have a problem with the following situation:
-
-```c++
-TEST_F(FooTest, AbcDeathTest) { ... }
-TEST_F(FooTest, Uvw) { ... }
-
-TEST_F(BarTest, DefDeathTest) { ... }
-TEST_F(BarTest, Xyz) { ... }
-```
-
-Since `FooTest.AbcDeathTest` needs to run before `BarTest.Xyz`, and we don't
-interleave tests from different test suites, we need to run all tests in the
-`FooTest` case before running any test in the `BarTest` case. This contradicts
-with the requirement to run `BarTest.DefDeathTest` before `FooTest.Uvw`.
-
-## But I don't like calling my entire test suite \*DeathTest when it contains both death tests and non-death tests. What do I do?
-
-You don't have to, but if you like, you may split up the test suite into
-`FooTest` and `FooDeathTest`, where the names make it clear that they are
-related:
-
-```c++
-class FooTest : public ::testing::Test { ... };
-
-TEST_F(FooTest, Abc) { ... }
-TEST_F(FooTest, Def) { ... }
-
-using FooDeathTest = FooTest;
-
-TEST_F(FooDeathTest, Uvw) { ... EXPECT_DEATH(...) ... }
-TEST_F(FooDeathTest, Xyz) { ... ASSERT_DEATH(...) ... }
-```
-
-## googletest prints the LOG messages in a death test's child process only when the test fails. How can I see the LOG messages when the death test succeeds?
-
-Printing the LOG messages generated by the statement inside `EXPECT_DEATH()`
-makes it harder to search for real problems in the parent's log. Therefore,
-googletest only prints them when the death test has failed.
-
-If you really need to see such LOG messages, a workaround is to temporarily
-break the death test (e.g. by changing the regex pattern it is expected to
-match). Admittedly, this is a hack. We'll consider a more permanent solution
-after the fork-and-exec-style death tests are implemented.
-
-## The compiler complains about "no match for 'operator<<'" when I use an assertion. What gives?
-
-If you use a user-defined type `FooType` in an assertion, you must make sure
-there is an `std::ostream& operator<<(std::ostream&, const FooType&)` function
-defined such that we can print a value of `FooType`.
-
-In addition, if `FooType` is declared in a name space, the `<<` operator also
-needs to be defined in the *same* name space. See https://abseil.io/tips/49 for details.
-
-## How do I suppress the memory leak messages on Windows?
-
-Since the statically initialized googletest singleton requires allocations on
-the heap, the Visual C++ memory leak detector will report memory leaks at the
-end of the program run. The easiest way to avoid this is to use the
-`_CrtMemCheckpoint` and `_CrtMemDumpAllObjectsSince` calls to not report any
-statically initialized heap objects. See MSDN for more details and additional
-heap check/debug routines.
-
-## How can my code detect if it is running in a test?
-
-If you write code that sniffs whether it's running in a test and does different
-things accordingly, you are leaking test-only logic into production code and
-there is no easy way to ensure that the test-only code paths aren't run by
-mistake in production. Such cleverness also leads to
-[Heisenbugs](https://en.wikipedia.org/wiki/Heisenbug). Therefore we strongly
-advise against the practice, and googletest doesn't provide a way to do it.
-
-In general, the recommended way to cause the code to behave differently under
-test is [Dependency Injection](https://en.wikipedia.org/wiki/Dependency_injection). You can inject
-different functionality from the test and from the production code. Since your
-production code doesn't link in the for-test logic at all (the
-[`testonly`](https://docs.bazel.build/versions/master/be/common-definitions.html#common.testonly) attribute for BUILD targets helps to ensure
-that), there is no danger in accidentally running it.
-
-However, if you *really*, *really*, *really* have no choice, and if you follow
-the rule of ending your test program names with `_test`, you can use the
-*horrible* hack of sniffing your executable name (`argv[0]` in `main()`) to know
-whether the code is under test.
-
-## How do I temporarily disable a test?
-
-If you have a broken test that you cannot fix right away, you can add the
-DISABLED_ prefix to its name. This will exclude it from execution. This is
-better than commenting out the code or using #if 0, as disabled tests are still
-compiled (and thus won't rot).
-
-To include disabled tests in test execution, just invoke the test program with
-the --gtest_also_run_disabled_tests flag.
-
-## Is it OK if I have two separate `TEST(Foo, Bar)` test methods defined in different namespaces?
-
-Yes.
-
-The rule is **all test methods in the same test suite must use the same fixture
-class.** This means that the following is **allowed** because both tests use the
-same fixture class (`::testing::Test`).
-
-```c++
-namespace foo {
-TEST(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace foo
-
-namespace bar {
-TEST(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace bar
-```
-
-However, the following code is **not allowed** and will produce a runtime error
-from googletest because the test methods are using different test fixture
-classes with the same test suite name.
-
-```c++
-namespace foo {
-class CoolTest : public ::testing::Test {};  // Fixture foo::CoolTest
-TEST_F(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace foo
-
-namespace bar {
-class CoolTest : public ::testing::Test {};  // Fixture: bar::CoolTest
-TEST_F(CoolTest, DoSomething) {
-  SUCCEED();
-}
-}  // namespace bar
-```
diff --git a/3rdparty/gtest/docs/pkgconfig.md b/3rdparty/gtest/docs/pkgconfig.md
deleted file mode 100644
index 6dc06738..00000000
--- a/3rdparty/gtest/docs/pkgconfig.md
+++ /dev/null
@@ -1,141 +0,0 @@
-## Using GoogleTest from various build systems
-
-GoogleTest comes with pkg-config files that can be used to determine all
-necessary flags for compiling and linking to GoogleTest (and GoogleMock).
-Pkg-config is a standardised plain-text format containing
-
-*   the includedir (-I) path
-*   necessary macro (-D) definitions
-*   further required flags (-pthread)
-*   the library (-L) path
-*   the library (-l) to link to
-
-All current build systems support pkg-config in one way or another. For all
-examples here we assume you want to compile the sample
-`samples/sample3_unittest.cc`.
-
-### CMake
-
-Using `pkg-config` in CMake is fairly easy:
-
-```cmake
-cmake_minimum_required(VERSION 3.0)
-
-cmake_policy(SET CMP0048 NEW)
-project(my_gtest_pkgconfig VERSION 0.0.1 LANGUAGES CXX)
-
-find_package(PkgConfig)
-pkg_search_module(GTEST REQUIRED gtest_main)
-
-add_executable(testapp samples/sample3_unittest.cc)
-target_link_libraries(testapp ${GTEST_LDFLAGS})
-target_compile_options(testapp PUBLIC ${GTEST_CFLAGS})
-
-include(CTest)
-add_test(first_and_only_test testapp)
-```
-
-It is generally recommended that you use `target_compile_options` + `_CFLAGS`
-over `target_include_directories` + `_INCLUDE_DIRS` as the former includes not
-just -I flags (GoogleTest might require a macro indicating to internal headers
-that all libraries have been compiled with threading enabled. In addition,
-GoogleTest might also require `-pthread` in the compiling step, and as such
-splitting the pkg-config `Cflags` variable into include dirs and macros for
-`target_compile_definitions()` might still miss this). The same recommendation
-goes for using `_LDFLAGS` over the more commonplace `_LIBRARIES`, which happens
-to discard `-L` flags and `-pthread`.
-
-### Autotools
-
-Finding GoogleTest in Autoconf and using it from Automake is also fairly easy:
-
-In your `configure.ac`:
-
-```
-AC_PREREQ([2.69])
-AC_INIT([my_gtest_pkgconfig], [0.0.1])
-AC_CONFIG_SRCDIR([samples/sample3_unittest.cc])
-AC_PROG_CXX
-
-PKG_CHECK_MODULES([GTEST], [gtest_main])
-
-AM_INIT_AUTOMAKE([foreign subdir-objects])
-AC_CONFIG_FILES([Makefile])
-AC_OUTPUT
-```
-
-and in your `Makefile.am`:
-
-```
-check_PROGRAMS = testapp
-TESTS = $(check_PROGRAMS)
-
-testapp_SOURCES = samples/sample3_unittest.cc
-testapp_CXXFLAGS = $(GTEST_CFLAGS)
-testapp_LDADD = $(GTEST_LIBS)
-```
-
-### Meson
-
-Meson natively uses pkgconfig to query dependencies:
-
-```
-project('my_gtest_pkgconfig', 'cpp', version : '0.0.1')
-
-gtest_dep = dependency('gtest_main')
-
-testapp = executable(
-  'testapp',
-  files(['samples/sample3_unittest.cc']),
-  dependencies : gtest_dep,
-  install : false)
-
-test('first_and_only_test', testapp)
-```
-
-### Plain Makefiles
-
-Since `pkg-config` is a small Unix command-line utility, it can be used in
-handwritten `Makefile`s too:
-
-```makefile
-GTEST_CFLAGS = `pkg-config --cflags gtest_main`
-GTEST_LIBS = `pkg-config --libs gtest_main`
-
-.PHONY: tests all
-
-tests: all
-  ./testapp
-
-all: testapp
-
-testapp: testapp.o
-  $(CXX) $(CXXFLAGS) $(LDFLAGS) $< -o $@ $(GTEST_LIBS)
-
-testapp.o: samples/sample3_unittest.cc
-  $(CXX) $(CPPFLAGS) $(CXXFLAGS) $< -c -o $@ $(GTEST_CFLAGS)
-```
-
-### Help! pkg-config can't find GoogleTest!
-
-Let's say you have a `CMakeLists.txt` along the lines of the one in this
-tutorial and you try to run `cmake`. It is very possible that you get a failure
-along the lines of:
-
-```
--- Checking for one of the modules 'gtest_main'
-CMake Error at /usr/share/cmake/Modules/FindPkgConfig.cmake:640 (message):
-  None of the required 'gtest_main' found
-```
-
-These failures are common if you installed GoogleTest yourself and have not
-sourced it from a distro or other package manager. If so, you need to tell
-pkg-config where it can find the `.pc` files containing the information. Say you
-installed GoogleTest to `/usr/local`, then it might be that the `.pc` files are
-installed under `/usr/local/lib64/pkgconfig`. If you set
-
-```
-export PKG_CONFIG_PATH=/usr/local/lib64/pkgconfig
-```
-
-pkg-config will also try to look in `PKG_CONFIG_PATH` to find `gtest_main.pc`.
diff --git a/3rdparty/gtest/docs/primer.md b/3rdparty/gtest/docs/primer.md
deleted file mode 100644
index 0317692b..00000000
--- a/3rdparty/gtest/docs/primer.md
+++ /dev/null
@@ -1,567 +0,0 @@
-# Googletest Primer
-
-## Introduction: Why googletest?
-
-*googletest* helps you write better C++ tests.
-
-googletest is a testing framework developed by the Testing Technology team with
-Google's specific requirements and constraints in mind. Whether you work on
-Linux, Windows, or a Mac, if you write C++ code, googletest can help you. And it
-supports *any* kind of tests, not just unit tests.
-
-So what makes a good test, and how does googletest fit in? We believe:
-
-1.  Tests should be *independent* and *repeatable*. It's a pain to debug a test
-    that succeeds or fails as a result of other tests. googletest isolates the
-    tests by running each of them on a different object. When a test fails,
-    googletest allows you to run it in isolation for quick debugging.
-2.  Tests should be well *organized* and reflect the structure of the tested
-    code. googletest groups related tests into test suites that can share data
-    and subroutines. This common pattern is easy to recognize and makes tests
-    easy to maintain. Such consistency is especially helpful when people switch
-    projects and start to work on a new code base.
-3.  Tests should be *portable* and *reusable*. Google has a lot of code that is
-    platform-neutral; its tests should also be platform-neutral. googletest
-    works on different OSes, with different compilers, with or without
-    exceptions, so googletest tests can work with a variety of configurations.
-4.  When tests fail, they should provide as much *information* about the problem
-    as possible. googletest doesn't stop at the first test failure. Instead, it
-    only stops the current test and continues with the next. You can also set up
-    tests that report non-fatal failures after which the current test continues.
-    Thus, you can detect and fix multiple bugs in a single run-edit-compile
-    cycle.
-5.  The testing framework should liberate test writers from housekeeping chores
-    and let them focus on the test *content*. googletest automatically keeps
-    track of all tests defined, and doesn't require the user to enumerate them
-    in order to run them.
-6.  Tests should be *fast*. With googletest, you can reuse shared resources
-    across tests and pay for the set-up/tear-down only once, without making
-    tests depend on each other.
-
-Since googletest is based on the popular xUnit architecture, you'll feel right
-at home if you've used JUnit or PyUnit before. If not, it will take you about 10
-minutes to learn the basics and get started. So let's go!
-
-## Beware of the nomenclature
-
-_Note:_ There might be some confusion arising from different definitions of the
-terms _Test_, _Test Case_ and _Test Suite_, so beware of misunderstanding these.
-
-Historically, googletest started to use the term _Test Case_ for grouping
-related tests, whereas current publications, including International Software
-Testing Qualifications Board ([ISTQB](http://www.istqb.org/)) materials and
-various textbooks on software quality, use the term
-_[Test Suite][istqb test suite]_ for this.
-
-The related term _Test_, as it is used in googletest, corresponds to the term
-_[Test Case][istqb test case]_ of ISTQB and others.
-
-The term _Test_ is commonly of broad enough sense, including ISTQB's definition
-of _Test Case_, so it's not much of a problem here. But the term _Test Case_ as
-was used in Google Test is of contradictory sense and thus confusing.
-
-googletest recently started replacing the term _Test Case_ with _Test Suite_.
-The preferred API is *TestSuite*. The older TestCase API is being slowly
-deprecated and refactored away.
-
-So please be aware of the different definitions of the terms:
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-Meaning                                                                              | googletest Term         | [ISTQB](http://www.istqb.org/) Term
-:----------------------------------------------------------------------------------- | :---------------------- | :----------------------------------
-Exercise a particular program path with specific input values and verify the results | [TEST()](#simple-tests) | [Test Case][istqb test case]
-
-<!-- mdformat on -->
-
-[istqb test case]: http://glossary.istqb.org/en/search/test%20case
-[istqb test suite]: http://glossary.istqb.org/en/search/test%20suite
-
-## Basic Concepts
-
-When using googletest, you start by writing *assertions*, which are statements
-that check whether a condition is true. An assertion's result can be *success*,
-*nonfatal failure*, or *fatal failure*. If a fatal failure occurs, it aborts the
-current function; otherwise the program continues normally.
-
-*Tests* use assertions to verify the tested code's behavior. If a test crashes
-or has a failed assertion, then it *fails*; otherwise it *succeeds*.
-
-A *test suite* contains one or many tests. You should group your tests into test
-suites that reflect the structure of the tested code. When multiple tests in a
-test suite need to share common objects and subroutines, you can put them into a
-*test fixture* class.
-
-A *test program* can contain multiple test suites.
-
-We'll now explain how to write a test program, starting at the individual
-assertion level and building up to tests and test suites.
-
-## Assertions
-
-googletest assertions are macros that resemble function calls. You test a class
-or function by making assertions about its behavior. When an assertion fails,
-googletest prints the assertion's source file and line number location, along
-with a failure message. You may also supply a custom failure message which will
-be appended to googletest's message.
-
-The assertions come in pairs that test the same thing but have different effects
-on the current function. `ASSERT_*` versions generate fatal failures when they
-fail, and **abort the current function**. `EXPECT_*` versions generate nonfatal
-failures, which don't abort the current function. Usually `EXPECT_*` are
-preferred, as they allow more than one failure to be reported in a test.
-However, you should use `ASSERT_*` if it doesn't make sense to continue when the
-assertion in question fails.
-
-Since a failed `ASSERT_*` returns from the current function immediately,
-possibly skipping clean-up code that comes after it, it may cause a space leak.
-Depending on the nature of the leak, it may or may not be worth fixing - so keep
-this in mind if you get a heap checker error in addition to assertion errors.
-
-To provide a custom failure message, simply stream it into the macro using the
-`<<` operator or a sequence of such operators. An example:
-
-```c++
-ASSERT_EQ(x.size(), y.size()) << "Vectors x and y are of unequal length";
-
-for (int i = 0; i < x.size(); ++i) {
-  EXPECT_EQ(x[i], y[i]) << "Vectors x and y differ at index " << i;
-}
-```
-
-Anything that can be streamed to an `ostream` can be streamed to an assertion
-macro--in particular, C strings and `string` objects. If a wide string
-(`wchar_t*`, `TCHAR*` in `UNICODE` mode on Windows, or `std::wstring`) is
-streamed to an assertion, it will be translated to UTF-8 when printed.
-
-### Basic Assertions
-
-These assertions do basic true/false condition testing.
-
-Fatal assertion            | Nonfatal assertion         | Verifies
--------------------------- | -------------------------- | --------------------
-`ASSERT_TRUE(condition);`  | `EXPECT_TRUE(condition);`  | `condition` is true
-`ASSERT_FALSE(condition);` | `EXPECT_FALSE(condition);` | `condition` is false
-
-Remember, when they fail, `ASSERT_*` yields a fatal failure and returns from the
-current function, while `EXPECT_*` yields a nonfatal failure, allowing the
-function to continue running. In either case, an assertion failure means its
-containing test fails.
-
-**Availability**: Linux, Windows, Mac.
-
-### Binary Comparison
-
-This section describes assertions that compare two values.
-
-Fatal assertion          | Nonfatal assertion       | Verifies
------------------------- | ------------------------ | --------------
-`ASSERT_EQ(val1, val2);` | `EXPECT_EQ(val1, val2);` | `val1 == val2`
-`ASSERT_NE(val1, val2);` | `EXPECT_NE(val1, val2);` | `val1 != val2`
-`ASSERT_LT(val1, val2);` | `EXPECT_LT(val1, val2);` | `val1 < val2`
-`ASSERT_LE(val1, val2);` | `EXPECT_LE(val1, val2);` | `val1 <= val2`
-`ASSERT_GT(val1, val2);` | `EXPECT_GT(val1, val2);` | `val1 > val2`
-`ASSERT_GE(val1, val2);` | `EXPECT_GE(val1, val2);` | `val1 >= val2`
-
-Value arguments must be comparable by the assertion's comparison operator or
-you'll get a compiler error. We used to require the arguments to support the
-`<<` operator for streaming to an `ostream`, but this is no longer necessary. If
-`<<` is supported, it will be called to print the arguments when the assertion
-fails; otherwise googletest will attempt to print them in the best way it can.
-For more details and how to customize the printing of the arguments, see the
-[documentation](../../googlemock/docs/cook_book.md#teaching-gmock-how-to-print-your-values).
-
-These assertions can work with a user-defined type, but only if you define the
-corresponding comparison operator (e.g., `==` or `<`). Since this is discouraged
-by the Google
-[C++ Style Guide](https://google.github.io/styleguide/cppguide.html#Operator_Overloading),
-you may need to use `ASSERT_TRUE()` or `EXPECT_TRUE()` to assert the equality of
-two objects of a user-defined type.
-
-However, when possible, `ASSERT_EQ(actual, expected)` is preferred to
-`ASSERT_TRUE(actual == expected)`, since it tells you `actual` and `expected`'s
-values on failure.
-
-Arguments are always evaluated exactly once. Therefore, it's OK for the
-arguments to have side effects. However, as with any ordinary C/C++ function,
-the arguments' evaluation order is undefined (i.e., the compiler is free to
-choose any order), and your code should not depend on any particular argument
-evaluation order.
-
-`ASSERT_EQ()` does pointer equality on pointers. If used on two C strings, it
-tests if they are in the same memory location, not if they have the same value.
-Therefore, if you want to compare C strings (e.g. `const char*`) by value, use
-`ASSERT_STREQ()`, which will be described later on. In particular, to assert
-that a C string is `NULL`, use `ASSERT_STREQ(c_string, NULL)`. Consider using
-`ASSERT_EQ(c_string, nullptr)` if c++11 is supported. To compare two `string`
-objects, you should use `ASSERT_EQ`.
-
-When doing pointer comparisons use `*_EQ(ptr, nullptr)` and `*_NE(ptr, nullptr)`
-instead of `*_EQ(ptr, NULL)` and `*_NE(ptr, NULL)`. This is because `nullptr` is
-typed, while `NULL` is not. See the [FAQ](faq.md) for more details.
-
-If you're working with floating point numbers, you may want to use the floating
-point variations of some of these macros in order to avoid problems caused by
-rounding. See [Advanced googletest Topics](advanced.md) for details.
-
-Macros in this section work with both narrow and wide string objects (`string`
-and `wstring`).
-
-**Availability**: Linux, Windows, Mac.
-
-**Historical note**: Before February 2016 `*_EQ` had a convention of calling it
-as `ASSERT_EQ(expected, actual)`, so lots of existing code uses this order. Now
-`*_EQ` treats both parameters in the same way.
-
-### String Comparison
-
-The assertions in this group compare two **C strings**. If you want to compare
-two `string` objects, use `EXPECT_EQ`, `EXPECT_NE`, and etc instead.
-
-<!-- mdformat off(github rendering does not support multiline tables) -->
-
-| Fatal assertion                | Nonfatal assertion             | Verifies                                                 |
-| --------------------------     | ------------------------------ | -------------------------------------------------------- |
-| `ASSERT_STREQ(str1,str2);`     | `EXPECT_STREQ(str1,str2);`     | the two C strings have the same content   		     |
-| `ASSERT_STRNE(str1,str2);`     | `EXPECT_STRNE(str1,str2);`     | the two C strings have different contents 		     |
-| `ASSERT_STRCASEEQ(str1,str2);` | `EXPECT_STRCASEEQ(str1,str2);` | the two C strings have the same content, ignoring case   |
-| `ASSERT_STRCASENE(str1,str2);` | `EXPECT_STRCASENE(str1,str2);` | the two C strings have different contents, ignoring case |
-
-<!-- mdformat on-->
-
-Note that "CASE" in an assertion name means that case is ignored. A `NULL`
-pointer and an empty string are considered *different*.
-
-`*STREQ*` and `*STRNE*` also accept wide C strings (`wchar_t*`). If a comparison
-of two wide strings fails, their values will be printed as UTF-8 narrow strings.
-
-**Availability**: Linux, Windows, Mac.
-
-**See also**: For more string comparison tricks (substring, prefix, suffix, and
-regular expression matching, for example), see [this](advanced.md) in the
-Advanced googletest Guide.
-
-## Simple Tests
-
-To create a test:
-
-1.  Use the `TEST()` macro to define and name a test function. These are
-    ordinary C++ functions that don't return a value.
-2.  In this function, along with any valid C++ statements you want to include,
-    use the various googletest assertions to check values.
-3.  The test's result is determined by the assertions; if any assertion in the
-    test fails (either fatally or non-fatally), or if the test crashes, the
-    entire test fails. Otherwise, it succeeds.
-
-```c++
-TEST(TestSuiteName, TestName) {
-  ... test body ...
-}
-```
-
-`TEST()` arguments go from general to specific. The *first* argument is the name
-of the test suite, and the *second* argument is the test's name within the test
-case. Both names must be valid C++ identifiers, and they should not contain
-any underscores (`_`). A test's *full name* consists of its containing test suite and
-its individual name. Tests from different test suites can have the same
-individual name.
-
-For example, let's take a simple integer function:
-
-```c++
-int Factorial(int n);  // Returns the factorial of n
-```
-
-A test suite for this function might look like:
-
-```c++
-// Tests factorial of 0.
-TEST(FactorialTest, HandlesZeroInput) {
-  EXPECT_EQ(Factorial(0), 1);
-}
-
-// Tests factorial of positive numbers.
-TEST(FactorialTest, HandlesPositiveInput) {
-  EXPECT_EQ(Factorial(1), 1);
-  EXPECT_EQ(Factorial(2), 2);
-  EXPECT_EQ(Factorial(3), 6);
-  EXPECT_EQ(Factorial(8), 40320);
-}
-```
-
-googletest groups the test results by test suites, so logically related tests
-should be in the same test suite; in other words, the first argument to their
-`TEST()` should be the same. In the above example, we have two tests,
-`HandlesZeroInput` and `HandlesPositiveInput`, that belong to the same test
-suite `FactorialTest`.
-
-When naming your test suites and tests, you should follow the same convention as
-for
-[naming functions and classes](https://google.github.io/styleguide/cppguide.html#Function_Names).
-
-**Availability**: Linux, Windows, Mac.
-
-## Test Fixtures: Using the Same Data Configuration for Multiple Tests {#same-data-multiple-tests}
-
-If you find yourself writing two or more tests that operate on similar data, you
-can use a *test fixture*. This allows you to reuse the same configuration of
-objects for several different tests.
-
-To create a fixture:
-
-1.  Derive a class from `::testing::Test` . Start its body with `protected:`, as
-    we'll want to access fixture members from sub-classes.
-2.  Inside the class, declare any objects you plan to use.
-3.  If necessary, write a default constructor or `SetUp()` function to prepare
-    the objects for each test. A common mistake is to spell `SetUp()` as
-    **`Setup()`** with a small `u` - Use `override` in C++11 to make sure you
-    spelled it correctly.
-4.  If necessary, write a destructor or `TearDown()` function to release any
-    resources you allocated in `SetUp()` . To learn when you should use the
-    constructor/destructor and when you should use `SetUp()/TearDown()`, read
-    the [FAQ](faq.md#CtorVsSetUp).
-5.  If needed, define subroutines for your tests to share.
-
-When using a fixture, use `TEST_F()` instead of `TEST()` as it allows you to
-access objects and subroutines in the test fixture:
-
-```c++
-TEST_F(TestFixtureName, TestName) {
-  ... test body ...
-}
-```
-
-Like `TEST()`, the first argument is the test suite name, but for `TEST_F()`
-this must be the name of the test fixture class. You've probably guessed: `_F`
-is for fixture.
-
-Unfortunately, the C++ macro system does not allow us to create a single macro
-that can handle both types of tests. Using the wrong macro causes a compiler
-error.
-
-Also, you must first define a test fixture class before using it in a
-`TEST_F()`, or you'll get the compiler error "`virtual outside class
-declaration`".
-
-For each test defined with `TEST_F()`, googletest will create a *fresh* test
-fixture at runtime, immediately initialize it via `SetUp()`, run the test,
-clean up by calling `TearDown()`, and then delete the test fixture. Note that
-different tests in the same test suite have different test fixture objects, and
-googletest always deletes a test fixture before it creates the next one.
-googletest does **not** reuse the same test fixture for multiple tests. Any
-changes one test makes to the fixture do not affect other tests.
-
-As an example, let's write tests for a FIFO queue class named `Queue`, which has
-the following interface:
-
-```c++
-template <typename E>  // E is the element type.
-class Queue {
- public:
-  Queue();
-  void Enqueue(const E& element);
-  E* Dequeue();  // Returns NULL if the queue is empty.
-  size_t size() const;
-  ...
-};
-```
-
-First, define a fixture class. By convention, you should give it the name
-`FooTest` where `Foo` is the class being tested.
-
-```c++
-class QueueTest : public ::testing::Test {
- protected:
-  void SetUp() override {
-     q1_.Enqueue(1);
-     q2_.Enqueue(2);
-     q2_.Enqueue(3);
-  }
-
-  // void TearDown() override {}
-
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-```
-
-In this case, `TearDown()` is not needed since we don't have to clean up after
-each test, other than what's already done by the destructor.
-
-Now we'll write tests using `TEST_F()` and this fixture.
-
-```c++
-TEST_F(QueueTest, IsEmptyInitially) {
-  EXPECT_EQ(q0_.size(), 0);
-}
-
-TEST_F(QueueTest, DequeueWorks) {
-  int* n = q0_.Dequeue();
-  EXPECT_EQ(n, nullptr);
-
-  n = q1_.Dequeue();
-  ASSERT_NE(n, nullptr);
-  EXPECT_EQ(*n, 1);
-  EXPECT_EQ(q1_.size(), 0);
-  delete n;
-
-  n = q2_.Dequeue();
-  ASSERT_NE(n, nullptr);
-  EXPECT_EQ(*n, 2);
-  EXPECT_EQ(q2_.size(), 1);
-  delete n;
-}
-```
-
-The above uses both `ASSERT_*` and `EXPECT_*` assertions. The rule of thumb is
-to use `EXPECT_*` when you want the test to continue to reveal more errors after
-the assertion failure, and use `ASSERT_*` when continuing after failure doesn't
-make sense. For example, the second assertion in the `Dequeue` test is
-`ASSERT_NE(nullptr, n)`, as we need to dereference the pointer `n` later, which
-would lead to a segfault when `n` is `NULL`.
-
-When these tests run, the following happens:
-
-1.  googletest constructs a `QueueTest` object (let's call it `t1`).
-2.  `t1.SetUp()` initializes `t1`.
-3.  The first test (`IsEmptyInitially`) runs on `t1`.
-4.  `t1.TearDown()` cleans up after the test finishes.
-5.  `t1` is destructed.
-6.  The above steps are repeated on another `QueueTest` object, this time
-    running the `DequeueWorks` test.
-
-**Availability**: Linux, Windows, Mac.
-
-## Invoking the Tests
-
-`TEST()` and `TEST_F()` implicitly register their tests with googletest. So,
-unlike with many other C++ testing frameworks, you don't have to re-list all
-your defined tests in order to run them.
-
-After defining your tests, you can run them with `RUN_ALL_TESTS()`, which
-returns `0` if all the tests are successful, or `1` otherwise. Note that
-`RUN_ALL_TESTS()` runs *all tests* in your link unit--they can be from
-different test suites, or even different source files.
-
-When invoked, the `RUN_ALL_TESTS()` macro:
-
-*   Saves the state of all googletest flags.
-
-*   Creates a test fixture object for the first test.
-
-*   Initializes it via `SetUp()`.
-
-*   Runs the test on the fixture object.
-
-*   Cleans up the fixture via `TearDown()`.
-
-*   Deletes the fixture.
-
-*   Restores the state of all googletest flags.
-
-*   Repeats the above steps for the next test, until all tests have run.
-
-If a fatal failure happens the subsequent steps will be skipped.
-
-> IMPORTANT: You must **not** ignore the return value of `RUN_ALL_TESTS()`, or
-> you will get a compiler error. The rationale for this design is that the
-> automated testing service determines whether a test has passed based on its
-> exit code, not on its stdout/stderr output; thus your `main()` function must
-> return the value of `RUN_ALL_TESTS()`.
->
-> Also, you should call `RUN_ALL_TESTS()` only **once**. Calling it more than
-> once conflicts with some advanced googletest features (e.g., thread-safe
-> [death tests](advanced.md#death-tests)) and thus is not supported.
-
-**Availability**: Linux, Windows, Mac.
-
-## Writing the main() Function
-
-Write your own main() function, which should return the value of
-`RUN_ALL_TESTS()`.
-
-You can start from this boilerplate:
-
-```c++
-#include "this/package/foo.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-// The fixture for testing class Foo.
-class FooTest : public ::testing::Test {
- protected:
-  // You can remove any or all of the following functions if its body
-  // is empty.
-
-  FooTest() {
-     // You can do set-up work for each test here.
-  }
-
-  ~FooTest() override {
-     // You can do clean-up work that doesn't throw exceptions here.
-  }
-
-  // If the constructor and destructor are not enough for setting up
-  // and cleaning up each test, you can define the following methods:
-
-  void SetUp() override {
-     // Code here will be called immediately after the constructor (right
-     // before each test).
-  }
-
-  void TearDown() override {
-     // Code here will be called immediately after each test (right
-     // before the destructor).
-  }
-
-  // Objects declared here can be used by all tests in the test suite for Foo.
-};
-
-// Tests that the Foo::Bar() method does Abc.
-TEST_F(FooTest, MethodBarDoesAbc) {
-  const std::string input_filepath = "this/package/testdata/myinputfile.dat";
-  const std::string output_filepath = "this/package/testdata/myoutputfile.dat";
-  Foo f;
-  EXPECT_EQ(f.Bar(input_filepath, output_filepath), 0);
-}
-
-// Tests that Foo does Xyz.
-TEST_F(FooTest, DoesXyz) {
-  // Exercises the Xyz feature of Foo.
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-```
-
-The `::testing::InitGoogleTest()` function parses the command line for
-googletest flags, and removes all recognized flags. This allows the user to
-control a test program's behavior via various flags, which we'll cover in
-the [AdvancedGuide](advanced.md). You **must** call this function before calling
-`RUN_ALL_TESTS()`, or the flags won't be properly initialized.
-
-On Windows, `InitGoogleTest()` also works with wide strings, so it can be used
-in programs compiled in `UNICODE` mode as well.
-
-But maybe you think that writing all those main() functions is too much work? We
-agree with you completely, and that's why Google Test provides a basic
-implementation of main(). If it fits your needs, then just link your test with
-gtest\_main library and you are good to go.
-
-NOTE: `ParseGUnitFlags()` is deprecated in favor of `InitGoogleTest()`.
-
-## Known Limitations
-
-*   Google Test is designed to be thread-safe. The implementation is thread-safe
-    on systems where the `pthreads` library is available. It is currently
-    _unsafe_ to use Google Test assertions from two threads concurrently on
-    other systems (e.g. Windows). In most tests this is not an issue as usually
-    the assertions are done in the main thread. If you want to help, you can
-    volunteer to implement the necessary synchronization primitives in
-    `gtest-port.h` for your platform.
diff --git a/3rdparty/gtest/docs/pump_manual.md b/3rdparty/gtest/docs/pump_manual.md
deleted file mode 100644
index 10b3c5ff..00000000
--- a/3rdparty/gtest/docs/pump_manual.md
+++ /dev/null
@@ -1,190 +0,0 @@
-<b>P</b>ump is <b>U</b>seful for <b>M</b>eta <b>P</b>rogramming.
-
-# The Problem
-
-Template and macro libraries often need to define many classes, functions, or
-macros that vary only (or almost only) in the number of arguments they take.
-It's a lot of repetitive, mechanical, and error-prone work.
-
-Variadic templates and variadic macros can alleviate the problem. However, while
-both are being considered by the C++ committee, neither is in the standard yet
-or widely supported by compilers. Thus they are often not a good choice,
-especially when your code needs to be portable. And their capabilities are still
-limited.
-
-As a result, authors of such libraries often have to write scripts to generate
-their implementation. However, our experience is that it's tedious to write such
-scripts, which tend to reflect the structure of the generated code poorly and
-are often hard to read and edit. For example, a small change needed in the
-generated code may require some non-intuitive, non-trivial changes in the
-script. This is especially painful when experimenting with the code.
-
-# Our Solution
-
-Pump (for Pump is Useful for Meta Programming, Pretty Useful for Meta
-Programming, or Practical Utility for Meta Programming, whichever you prefer) is
-a simple meta-programming tool for C++. The idea is that a programmer writes a
-`foo.pump` file which contains C++ code plus meta code that manipulates the C++
-code. The meta code can handle iterations over a range, nested iterations, local
-meta variable definitions, simple arithmetic, and conditional expressions. You
-can view it as a small Domain-Specific Language. The meta language is designed
-to be non-intrusive (s.t. it won't confuse Emacs' C++ mode, for example) and
-concise, making Pump code intuitive and easy to maintain.
-
-## Highlights
-
-*   The implementation is in a single Python script and thus ultra portable: no
-    build or installation is needed and it works cross platforms.
-*   Pump tries to be smart with respect to
-    [Google's style guide](https://github.com/google/styleguide): it breaks long
-    lines (easy to have when they are generated) at acceptable places to fit
-    within 80 columns and indent the continuation lines correctly.
-*   The format is human-readable and more concise than XML.
-*   The format works relatively well with Emacs' C++ mode.
-
-## Examples
-
-The following Pump code (where meta keywords start with `$`, `[[` and `]]` are
-meta brackets, and `$$` starts a meta comment that ends with the line):
-
-```
-$var n = 3     $$ Defines a meta variable n.
-$range i 0..n  $$ Declares the range of meta iterator i (inclusive).
-$for i [[
-               $$ Meta loop.
-// Foo$i does blah for $i-ary predicates.
-$range j 1..i
-template <size_t N $for j [[, typename A$j]]>
-class Foo$i {
-$if i == 0 [[
-  blah a;
-]] $elif i <= 2 [[
-  blah b;
-]] $else [[
-  blah c;
-]]
-};
-
-]]
-```
-
-will be translated by the Pump compiler to:
-
-```cpp
-// Foo0 does blah for 0-ary predicates.
-template <size_t N>
-class Foo0 {
-  blah a;
-};
-
-// Foo1 does blah for 1-ary predicates.
-template <size_t N, typename A1>
-class Foo1 {
-  blah b;
-};
-
-// Foo2 does blah for 2-ary predicates.
-template <size_t N, typename A1, typename A2>
-class Foo2 {
-  blah b;
-};
-
-// Foo3 does blah for 3-ary predicates.
-template <size_t N, typename A1, typename A2, typename A3>
-class Foo3 {
-  blah c;
-};
-```
-
-In another example,
-
-```
-$range i 1..n
-Func($for i + [[a$i]]);
-$$ The text between i and [[ is the separator between iterations.
-```
-
-will generate one of the following lines (without the comments), depending on
-the value of `n`:
-
-```cpp
-Func();              // If n is 0.
-Func(a1);            // If n is 1.
-Func(a1 + a2);       // If n is 2.
-Func(a1 + a2 + a3);  // If n is 3.
-// And so on...
-```
-
-## Constructs
-
-We support the following meta programming constructs:
-
-| `$var id = exp`                  | Defines a named constant value. `$id` is |
-:                                  : valid util the end of the current meta   :
-:                                  : lexical block.                           :
-| :------------------------------- | :--------------------------------------- |
-| `$range id exp..exp`             | Sets the range of an iteration variable, |
-:                                  : which can be reused in multiple loops    :
-:                                  : later.                                   :
-| `$for id sep [[ code ]]`         | Iteration. The range of `id` must have   |
-:                                  : been defined earlier. `$id` is valid in  :
-:                                  : `code`.                                  :
-| `$($)`                           | Generates a single `$` character.        |
-| `$id`                            | Value of the named constant or iteration |
-:                                  : variable.                                :
-| `$(exp)`                         | Value of the expression.                 |
-| `$if exp [[ code ]] else_branch` | Conditional.                             |
-| `[[ code ]]`                     | Meta lexical block.                      |
-| `cpp_code`                       | Raw C++ code.                            |
-| `$$ comment`                     | Meta comment.                            |
-
-**Note:** To give the user some freedom in formatting the Pump source code, Pump
-ignores a new-line character if it's right after `$for foo` or next to `[[` or
-`]]`. Without this rule you'll often be forced to write very long lines to get
-the desired output. Therefore sometimes you may need to insert an extra new-line
-in such places for a new-line to show up in your output.
-
-## Grammar
-
-```ebnf
-code ::= atomic_code*
-atomic_code ::= $var id = exp
-    | $var id = [[ code ]]
-    | $range id exp..exp
-    | $for id sep [[ code ]]
-    | $($)
-    | $id
-    | $(exp)
-    | $if exp [[ code ]] else_branch
-    | [[ code ]]
-    | cpp_code
-sep ::= cpp_code | empty_string
-else_branch ::= $else [[ code ]]
-    | $elif exp [[ code ]] else_branch
-    | empty_string
-exp ::= simple_expression_in_Python_syntax
-```
-
-## Code
-
-You can find the source code of Pump in [scripts/pump.py](../scripts/pump.py).
-It is still very unpolished and lacks automated tests, although it has been
-successfully used many times. If you find a chance to use it in your project,
-please let us know what you think! We also welcome help on improving Pump.
-
-## Real Examples
-
-You can find real-world applications of Pump in
-[Google Test](https://github.com/google/googletest/tree/master/googletest) and
-[Google Mock](https://github.com/google/googletest/tree/master/googlemock). The
-source file `foo.h.pump` generates `foo.h`.
-
-## Tips
-
-*   If a meta variable is followed by a letter or digit, you can separate them
-    using `[[]]`, which inserts an empty string. For example `Foo$j[[]]Helper`
-    generate `Foo1Helper` when `j` is 1.
-*   To avoid extra-long Pump source lines, you can break a line anywhere you
-    want by inserting `[[]]` followed by a new line. Since any new-line
-    character next to `[[` or `]]` is ignored, the generated code won't contain
-    this new line.
diff --git a/3rdparty/gtest/docs/samples.md b/3rdparty/gtest/docs/samples.md
deleted file mode 100644
index aaa58838..00000000
--- a/3rdparty/gtest/docs/samples.md
+++ /dev/null
@@ -1,22 +0,0 @@
-# Googletest Samples {#samples}
-
-If you're like us, you'd like to look at
-[googletest samples.](https://github.com/google/googletest/tree/master/googletest/samples)
-The sample directory has a number of well-commented samples showing how to use a
-variety of googletest features.
-
-*   Sample #1 shows the basic steps of using googletest to test C++ functions.
-*   Sample #2 shows a more complex unit test for a class with multiple member
-    functions.
-*   Sample #3 uses a test fixture.
-*   Sample #4 teaches you how to use googletest and `googletest.h` together to
-    get the best of both libraries.
-*   Sample #5 puts shared testing logic in a base test fixture, and reuses it in
-    derived fixtures.
-*   Sample #6 demonstrates type-parameterized tests.
-*   Sample #7 teaches the basics of value-parameterized tests.
-*   Sample #8 shows using `Combine()` in value-parameterized tests.
-*   Sample #9 shows use of the listener API to modify Google Test's console
-    output and the use of its reflection API to inspect test results.
-*   Sample #10 shows use of the listener API to implement a primitive memory
-    leak checker.
diff --git a/3rdparty/gtest/include/gtest/gtest-death-test.h b/3rdparty/gtest/include/gtest/gtest-death-test.h
deleted file mode 100644
index dc878ffb..00000000
--- a/3rdparty/gtest/include/gtest/gtest-death-test.h
+++ /dev/null
@@ -1,343 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the public API for death tests.  It is
-// #included by gtest.h so a user doesn't need to include this
-// directly.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-#define GTEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
-
-#include "gtest/internal/gtest-death-test-internal.h"
-
-namespace testing {
-
-// This flag controls the style of death tests.  Valid values are "threadsafe",
-// meaning that the death test child process will re-execute the test binary
-// from the start, running only a single death test, or "fast",
-// meaning that the child process will execute the test logic immediately
-// after forking.
-GTEST_DECLARE_string_(death_test_style);
-
-#if GTEST_HAS_DEATH_TEST
-
-namespace internal {
-
-// Returns a Boolean value indicating whether the caller is currently
-// executing in the context of the death test child process.  Tools such as
-// Valgrind heap checkers may need this to modify their behavior in death
-// tests.  IMPORTANT: This is an internal utility.  Using it may break the
-// implementation of death tests.  User code MUST NOT use it.
-GTEST_API_ bool InDeathTestChild();
-
-}  // namespace internal
-
-// The following macros are useful for writing death tests.
-
-// Here's what happens when an ASSERT_DEATH* or EXPECT_DEATH* is
-// executed:
-//
-//   1. It generates a warning if there is more than one active
-//   thread.  This is because it's safe to fork() or clone() only
-//   when there is a single thread.
-//
-//   2. The parent process clone()s a sub-process and runs the death
-//   test in it; the sub-process exits with code 0 at the end of the
-//   death test, if it hasn't exited already.
-//
-//   3. The parent process waits for the sub-process to terminate.
-//
-//   4. The parent process checks the exit code and error message of
-//   the sub-process.
-//
-// Examples:
-//
-//   ASSERT_DEATH(server.SendMessage(56, "Hello"), "Invalid port number");
-//   for (int i = 0; i < 5; i++) {
-//     EXPECT_DEATH(server.ProcessRequest(i),
-//                  "Invalid request .* in ProcessRequest()")
-//                  << "Failed to die on request " << i;
-//   }
-//
-//   ASSERT_EXIT(server.ExitNow(), ::testing::ExitedWithCode(0), "Exiting");
-//
-//   bool KilledBySIGHUP(int exit_code) {
-//     return WIFSIGNALED(exit_code) && WTERMSIG(exit_code) == SIGHUP;
-//   }
-//
-//   ASSERT_EXIT(client.HangUpServer(), KilledBySIGHUP, "Hanging up!");
-//
-// On the regular expressions used in death tests:
-//
-//   GOOGLETEST_CM0005 DO NOT DELETE
-//   On POSIX-compliant systems (*nix), we use the <regex.h> library,
-//   which uses the POSIX extended regex syntax.
-//
-//   On other platforms (e.g. Windows or Mac), we only support a simple regex
-//   syntax implemented as part of Google Test.  This limited
-//   implementation should be enough most of the time when writing
-//   death tests; though it lacks many features you can find in PCRE
-//   or POSIX extended regex syntax.  For example, we don't support
-//   union ("x|y"), grouping ("(xy)"), brackets ("[xy]"), and
-//   repetition count ("x{5,7}"), among others.
-//
-//   Below is the syntax that we do support.  We chose it to be a
-//   subset of both PCRE and POSIX extended regex, so it's easy to
-//   learn wherever you come from.  In the following: 'A' denotes a
-//   literal character, period (.), or a single \\ escape sequence;
-//   'x' and 'y' denote regular expressions; 'm' and 'n' are for
-//   natural numbers.
-//
-//     c     matches any literal character c
-//     \\d   matches any decimal digit
-//     \\D   matches any character that's not a decimal digit
-//     \\f   matches \f
-//     \\n   matches \n
-//     \\r   matches \r
-//     \\s   matches any ASCII whitespace, including \n
-//     \\S   matches any character that's not a whitespace
-//     \\t   matches \t
-//     \\v   matches \v
-//     \\w   matches any letter, _, or decimal digit
-//     \\W   matches any character that \\w doesn't match
-//     \\c   matches any literal character c, which must be a punctuation
-//     .     matches any single character except \n
-//     A?    matches 0 or 1 occurrences of A
-//     A*    matches 0 or many occurrences of A
-//     A+    matches 1 or many occurrences of A
-//     ^     matches the beginning of a string (not that of each line)
-//     $     matches the end of a string (not that of each line)
-//     xy    matches x followed by y
-//
-//   If you accidentally use PCRE or POSIX extended regex features
-//   not implemented by us, you will get a run-time failure.  In that
-//   case, please try to rewrite your regular expression within the
-//   above syntax.
-//
-//   This implementation is *not* meant to be as highly tuned or robust
-//   as a compiled regex library, but should perform well enough for a
-//   death test, which already incurs significant overhead by launching
-//   a child process.
-//
-// Known caveats:
-//
-//   A "threadsafe" style death test obtains the path to the test
-//   program from argv[0] and re-executes it in the sub-process.  For
-//   simplicity, the current implementation doesn't search the PATH
-//   when launching the sub-process.  This means that the user must
-//   invoke the test program via a path that contains at least one
-//   path separator (e.g. path/to/foo_test and
-//   /absolute/path/to/bar_test are fine, but foo_test is not).  This
-//   is rarely a problem as people usually don't put the test binary
-//   directory in PATH.
-//
-
-// Asserts that a given statement causes the program to exit, with an
-// integer exit status that satisfies predicate, and emitting error output
-// that matches regex.
-# define ASSERT_EXIT(statement, predicate, regex) \
-    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_FATAL_FAILURE_)
-
-// Like ASSERT_EXIT, but continues on to successive tests in the
-// test suite, if any:
-# define EXPECT_EXIT(statement, predicate, regex) \
-    GTEST_DEATH_TEST_(statement, predicate, regex, GTEST_NONFATAL_FAILURE_)
-
-// Asserts that a given statement causes the program to exit, either by
-// explicitly exiting with a nonzero exit code or being killed by a
-// signal, and emitting error output that matches regex.
-# define ASSERT_DEATH(statement, regex) \
-    ASSERT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
-
-// Like ASSERT_DEATH, but continues on to successive tests in the
-// test suite, if any:
-# define EXPECT_DEATH(statement, regex) \
-    EXPECT_EXIT(statement, ::testing::internal::ExitedUnsuccessfully, regex)
-
-// Two predicate classes that can be used in {ASSERT,EXPECT}_EXIT*:
-
-// Tests that an exit code describes a normal exit with a given exit code.
-class GTEST_API_ ExitedWithCode {
- public:
-  explicit ExitedWithCode(int exit_code);
-  bool operator()(int exit_status) const;
- private:
-  // No implementation - assignment is unsupported.
-  void operator=(const ExitedWithCode& other);
-
-  const int exit_code_;
-};
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// Tests that an exit code describes an exit due to termination by a
-// given signal.
-// GOOGLETEST_CM0006 DO NOT DELETE
-class GTEST_API_ KilledBySignal {
- public:
-  explicit KilledBySignal(int signum);
-  bool operator()(int exit_status) const;
- private:
-  const int signum_;
-};
-# endif  // !GTEST_OS_WINDOWS
-
-// EXPECT_DEBUG_DEATH asserts that the given statements die in debug mode.
-// The death testing framework causes this to have interesting semantics,
-// since the sideeffects of the call are only visible in opt mode, and not
-// in debug mode.
-//
-// In practice, this can be used to test functions that utilize the
-// LOG(DFATAL) macro using the following style:
-//
-// int DieInDebugOr12(int* sideeffect) {
-//   if (sideeffect) {
-//     *sideeffect = 12;
-//   }
-//   LOG(DFATAL) << "death";
-//   return 12;
-// }
-//
-// TEST(TestSuite, TestDieOr12WorksInDgbAndOpt) {
-//   int sideeffect = 0;
-//   // Only asserts in dbg.
-//   EXPECT_DEBUG_DEATH(DieInDebugOr12(&sideeffect), "death");
-//
-// #ifdef NDEBUG
-//   // opt-mode has sideeffect visible.
-//   EXPECT_EQ(12, sideeffect);
-// #else
-//   // dbg-mode no visible sideeffect.
-//   EXPECT_EQ(0, sideeffect);
-// #endif
-// }
-//
-// This will assert that DieInDebugReturn12InOpt() crashes in debug
-// mode, usually due to a DCHECK or LOG(DFATAL), but returns the
-// appropriate fallback value (12 in this case) in opt mode. If you
-// need to test that a function has appropriate side-effects in opt
-// mode, include assertions against the side-effects.  A general
-// pattern for this is:
-//
-// EXPECT_DEBUG_DEATH({
-//   // Side-effects here will have an effect after this statement in
-//   // opt mode, but none in debug mode.
-//   EXPECT_EQ(12, DieInDebugOr12(&sideeffect));
-// }, "death");
-//
-# ifdef NDEBUG
-
-#  define EXPECT_DEBUG_DEATH(statement, regex) \
-  GTEST_EXECUTE_STATEMENT_(statement, regex)
-
-#  define ASSERT_DEBUG_DEATH(statement, regex) \
-  GTEST_EXECUTE_STATEMENT_(statement, regex)
-
-# else
-
-#  define EXPECT_DEBUG_DEATH(statement, regex) \
-  EXPECT_DEATH(statement, regex)
-
-#  define ASSERT_DEBUG_DEATH(statement, regex) \
-  ASSERT_DEATH(statement, regex)
-
-# endif  // NDEBUG for EXPECT_DEBUG_DEATH
-#endif  // GTEST_HAS_DEATH_TEST
-
-// This macro is used for implementing macros such as
-// EXPECT_DEATH_IF_SUPPORTED and ASSERT_DEATH_IF_SUPPORTED on systems where
-// death tests are not supported. Those macros must compile on such systems
-// if and only if EXPECT_DEATH and ASSERT_DEATH compile with the same parameters
-// on systems that support death tests. This allows one to write such a macro on
-// a system that does not support death tests and be sure that it will compile
-// on a death-test supporting system. It is exposed publicly so that systems
-// that have death-tests with stricter requirements than GTEST_HAS_DEATH_TEST
-// can write their own equivalent of EXPECT_DEATH_IF_SUPPORTED and
-// ASSERT_DEATH_IF_SUPPORTED.
-//
-// Parameters:
-//   statement -  A statement that a macro such as EXPECT_DEATH would test
-//                for program termination. This macro has to make sure this
-//                statement is compiled but not executed, to ensure that
-//                EXPECT_DEATH_IF_SUPPORTED compiles with a certain
-//                parameter if and only if EXPECT_DEATH compiles with it.
-//   regex     -  A regex that a macro such as EXPECT_DEATH would use to test
-//                the output of statement.  This parameter has to be
-//                compiled but not evaluated by this macro, to ensure that
-//                this macro only accepts expressions that a macro such as
-//                EXPECT_DEATH would accept.
-//   terminator - Must be an empty statement for EXPECT_DEATH_IF_SUPPORTED
-//                and a return statement for ASSERT_DEATH_IF_SUPPORTED.
-//                This ensures that ASSERT_DEATH_IF_SUPPORTED will not
-//                compile inside functions where ASSERT_DEATH doesn't
-//                compile.
-//
-//  The branch that has an always false condition is used to ensure that
-//  statement and regex are compiled (and thus syntactically correct) but
-//  never executed. The unreachable code macro protects the terminator
-//  statement from generating an 'unreachable code' warning in case
-//  statement unconditionally returns or throws. The Message constructor at
-//  the end allows the syntax of streaming additional messages into the
-//  macro, for compilational compatibility with EXPECT_DEATH/ASSERT_DEATH.
-# define GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, terminator) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::AlwaysTrue()) { \
-      GTEST_LOG_(WARNING) \
-          << "Death tests are not supported on this platform.\n" \
-          << "Statement '" #statement "' cannot be verified."; \
-    } else if (::testing::internal::AlwaysFalse()) { \
-      ::testing::internal::RE::PartialMatch(".*", (regex)); \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-      terminator; \
-    } else \
-      ::testing::Message()
-
-// EXPECT_DEATH_IF_SUPPORTED(statement, regex) and
-// ASSERT_DEATH_IF_SUPPORTED(statement, regex) expand to real death tests if
-// death tests are supported; otherwise they just issue a warning.  This is
-// useful when you are combining death test assertions with normal test
-// assertions in one test.
-#if GTEST_HAS_DEATH_TEST
-# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    EXPECT_DEATH(statement, regex)
-# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    ASSERT_DEATH(statement, regex)
-#else
-# define EXPECT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, )
-# define ASSERT_DEATH_IF_SUPPORTED(statement, regex) \
-    GTEST_UNSUPPORTED_DEATH_TEST(statement, regex, return)
-#endif
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_DEATH_TEST_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-matchers.h b/3rdparty/gtest/include/gtest/gtest-matchers.h
deleted file mode 100644
index 9de6c2e1..00000000
--- a/3rdparty/gtest/include/gtest/gtest-matchers.h
+++ /dev/null
@@ -1,750 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file implements just enough of the matcher interface to allow
-// EXPECT_DEATH and friends to accept a matcher argument.
-
-// IWYU pragma: private, include "testing/base/public/gunit.h"
-// IWYU pragma: friend third_party/googletest/googlemock/.*
-// IWYU pragma: friend third_party/googletest/googletest/.*
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-#define GTEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
-
-#include <memory>
-#include <ostream>
-#include <string>
-#include <type_traits>
-
-#include "gtest/gtest-printers.h"
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-
-// MSVC warning C5046 is new as of VS2017 version 15.8.
-#if defined(_MSC_VER) && _MSC_VER >= 1915
-#define GTEST_MAYBE_5046_ 5046
-#else
-#define GTEST_MAYBE_5046_
-#endif
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(
-    4251 GTEST_MAYBE_5046_ /* class A needs to have dll-interface to be used by
-                              clients of class B */
-    /* Symbol involving type with internal linkage not defined */)
-
-namespace testing {
-
-// To implement a matcher Foo for type T, define:
-//   1. a class FooMatcherImpl that implements the
-//      MatcherInterface<T> interface, and
-//   2. a factory function that creates a Matcher<T> object from a
-//      FooMatcherImpl*.
-//
-// The two-level delegation design makes it possible to allow a user
-// to write "v" instead of "Eq(v)" where a Matcher is expected, which
-// is impossible if we pass matchers by pointers.  It also eases
-// ownership management as Matcher objects can now be copied like
-// plain values.
-
-// MatchResultListener is an abstract class.  Its << operator can be
-// used by a matcher to explain why a value matches or doesn't match.
-//
-class MatchResultListener {
- public:
-  // Creates a listener object with the given underlying ostream.  The
-  // listener does not own the ostream, and does not dereference it
-  // in the constructor or destructor.
-  explicit MatchResultListener(::std::ostream* os) : stream_(os) {}
-  virtual ~MatchResultListener() = 0;  // Makes this class abstract.
-
-  // Streams x to the underlying ostream; does nothing if the ostream
-  // is NULL.
-  template <typename T>
-  MatchResultListener& operator<<(const T& x) {
-    if (stream_ != nullptr) *stream_ << x;
-    return *this;
-  }
-
-  // Returns the underlying ostream.
-  ::std::ostream* stream() { return stream_; }
-
-  // Returns true if and only if the listener is interested in an explanation
-  // of the match result.  A matcher's MatchAndExplain() method can use
-  // this information to avoid generating the explanation when no one
-  // intends to hear it.
-  bool IsInterested() const { return stream_ != nullptr; }
-
- private:
-  ::std::ostream* const stream_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MatchResultListener);
-};
-
-inline MatchResultListener::~MatchResultListener() {
-}
-
-// An instance of a subclass of this knows how to describe itself as a
-// matcher.
-class MatcherDescriberInterface {
- public:
-  virtual ~MatcherDescriberInterface() {}
-
-  // Describes this matcher to an ostream.  The function should print
-  // a verb phrase that describes the property a value matching this
-  // matcher should have.  The subject of the verb phrase is the value
-  // being matched.  For example, the DescribeTo() method of the Gt(7)
-  // matcher prints "is greater than 7".
-  virtual void DescribeTo(::std::ostream* os) const = 0;
-
-  // Describes the negation of this matcher to an ostream.  For
-  // example, if the description of this matcher is "is greater than
-  // 7", the negated description could be "is not greater than 7".
-  // You are not required to override this when implementing
-  // MatcherInterface, but it is highly advised so that your matcher
-  // can produce good error messages.
-  virtual void DescribeNegationTo(::std::ostream* os) const {
-    *os << "not (";
-    DescribeTo(os);
-    *os << ")";
-  }
-};
-
-// The implementation of a matcher.
-template <typename T>
-class MatcherInterface : public MatcherDescriberInterface {
- public:
-  // Returns true if and only if the matcher matches x; also explains the
-  // match result to 'listener' if necessary (see the next paragraph), in
-  // the form of a non-restrictive relative clause ("which ...",
-  // "whose ...", etc) that describes x.  For example, the
-  // MatchAndExplain() method of the Pointee(...) matcher should
-  // generate an explanation like "which points to ...".
-  //
-  // Implementations of MatchAndExplain() should add an explanation of
-  // the match result *if and only if* they can provide additional
-  // information that's not already present (or not obvious) in the
-  // print-out of x and the matcher's description.  Whether the match
-  // succeeds is not a factor in deciding whether an explanation is
-  // needed, as sometimes the caller needs to print a failure message
-  // when the match succeeds (e.g. when the matcher is used inside
-  // Not()).
-  //
-  // For example, a "has at least 10 elements" matcher should explain
-  // what the actual element count is, regardless of the match result,
-  // as it is useful information to the reader; on the other hand, an
-  // "is empty" matcher probably only needs to explain what the actual
-  // size is when the match fails, as it's redundant to say that the
-  // size is 0 when the value is already known to be empty.
-  //
-  // You should override this method when defining a new matcher.
-  //
-  // It's the responsibility of the caller (Google Test) to guarantee
-  // that 'listener' is not NULL.  This helps to simplify a matcher's
-  // implementation when it doesn't care about the performance, as it
-  // can talk to 'listener' without checking its validity first.
-  // However, in order to implement dummy listeners efficiently,
-  // listener->stream() may be NULL.
-  virtual bool MatchAndExplain(T x, MatchResultListener* listener) const = 0;
-
-  // Inherits these methods from MatcherDescriberInterface:
-  //   virtual void DescribeTo(::std::ostream* os) const = 0;
-  //   virtual void DescribeNegationTo(::std::ostream* os) const;
-};
-
-namespace internal {
-
-// Converts a MatcherInterface<T> to a MatcherInterface<const T&>.
-template <typename T>
-class MatcherInterfaceAdapter : public MatcherInterface<const T&> {
- public:
-  explicit MatcherInterfaceAdapter(const MatcherInterface<T>* impl)
-      : impl_(impl) {}
-  ~MatcherInterfaceAdapter() override { delete impl_; }
-
-  void DescribeTo(::std::ostream* os) const override { impl_->DescribeTo(os); }
-
-  void DescribeNegationTo(::std::ostream* os) const override {
-    impl_->DescribeNegationTo(os);
-  }
-
-  bool MatchAndExplain(const T& x,
-                       MatchResultListener* listener) const override {
-    return impl_->MatchAndExplain(x, listener);
-  }
-
- private:
-  const MatcherInterface<T>* const impl_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MatcherInterfaceAdapter);
-};
-
-struct AnyEq {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a == b; }
-};
-struct AnyNe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a != b; }
-};
-struct AnyLt {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a < b; }
-};
-struct AnyGt {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a > b; }
-};
-struct AnyLe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a <= b; }
-};
-struct AnyGe {
-  template <typename A, typename B>
-  bool operator()(const A& a, const B& b) const { return a >= b; }
-};
-
-// A match result listener that ignores the explanation.
-class DummyMatchResultListener : public MatchResultListener {
- public:
-  DummyMatchResultListener() : MatchResultListener(nullptr) {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DummyMatchResultListener);
-};
-
-// A match result listener that forwards the explanation to a given
-// ostream.  The difference between this and MatchResultListener is
-// that the former is concrete.
-class StreamMatchResultListener : public MatchResultListener {
- public:
-  explicit StreamMatchResultListener(::std::ostream* os)
-      : MatchResultListener(os) {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamMatchResultListener);
-};
-
-// An internal class for implementing Matcher<T>, which will derive
-// from it.  We put functionalities common to all Matcher<T>
-// specializations here to avoid code duplication.
-template <typename T>
-class MatcherBase {
- public:
-  // Returns true if and only if the matcher matches x; also explains the
-  // match result to 'listener'.
-  bool MatchAndExplain(const T& x, MatchResultListener* listener) const {
-    return impl_->MatchAndExplain(x, listener);
-  }
-
-  // Returns true if and only if this matcher matches x.
-  bool Matches(const T& x) const {
-    DummyMatchResultListener dummy;
-    return MatchAndExplain(x, &dummy);
-  }
-
-  // Describes this matcher to an ostream.
-  void DescribeTo(::std::ostream* os) const { impl_->DescribeTo(os); }
-
-  // Describes the negation of this matcher to an ostream.
-  void DescribeNegationTo(::std::ostream* os) const {
-    impl_->DescribeNegationTo(os);
-  }
-
-  // Explains why x matches, or doesn't match, the matcher.
-  void ExplainMatchResultTo(const T& x, ::std::ostream* os) const {
-    StreamMatchResultListener listener(os);
-    MatchAndExplain(x, &listener);
-  }
-
-  // Returns the describer for this matcher object; retains ownership
-  // of the describer, which is only guaranteed to be alive when
-  // this matcher object is alive.
-  const MatcherDescriberInterface* GetDescriber() const {
-    return impl_.get();
-  }
-
- protected:
-  MatcherBase() {}
-
-  // Constructs a matcher from its implementation.
-  explicit MatcherBase(const MatcherInterface<const T&>* impl) : impl_(impl) {}
-
-  template <typename U>
-  explicit MatcherBase(
-      const MatcherInterface<U>* impl,
-      typename std::enable_if<!std::is_same<U, const U&>::value>::type* =
-          nullptr)
-      : impl_(new internal::MatcherInterfaceAdapter<U>(impl)) {}
-
-  MatcherBase(const MatcherBase&) = default;
-  MatcherBase& operator=(const MatcherBase&) = default;
-  MatcherBase(MatcherBase&&) = default;
-  MatcherBase& operator=(MatcherBase&&) = default;
-
-  virtual ~MatcherBase() {}
-
- private:
-  std::shared_ptr<const MatcherInterface<const T&>> impl_;
-};
-
-}  // namespace internal
-
-// A Matcher<T> is a copyable and IMMUTABLE (except by assignment)
-// object that can check whether a value of type T matches.  The
-// implementation of Matcher<T> is just a std::shared_ptr to const
-// MatcherInterface<T>.  Don't inherit from Matcher!
-template <typename T>
-class Matcher : public internal::MatcherBase<T> {
- public:
-  // Constructs a null matcher.  Needed for storing Matcher objects in STL
-  // containers.  A default-constructed matcher is not yet initialized.  You
-  // cannot use it until a valid value has been assigned to it.
-  explicit Matcher() {}  // NOLINT
-
-  // Constructs a matcher from its implementation.
-  explicit Matcher(const MatcherInterface<const T&>* impl)
-      : internal::MatcherBase<T>(impl) {}
-
-  template <typename U>
-  explicit Matcher(
-      const MatcherInterface<U>* impl,
-      typename std::enable_if<!std::is_same<U, const U&>::value>::type* =
-          nullptr)
-      : internal::MatcherBase<T>(impl) {}
-
-  // Implicit constructor here allows people to write
-  // EXPECT_CALL(foo, Bar(5)) instead of EXPECT_CALL(foo, Bar(Eq(5))) sometimes
-  Matcher(T value);  // NOLINT
-};
-
-// The following two specializations allow the user to write str
-// instead of Eq(str) and "foo" instead of Eq("foo") when a std::string
-// matcher is expected.
-template <>
-class GTEST_API_ Matcher<const std::string&>
-    : public internal::MatcherBase<const std::string&> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const std::string&>* impl)
-      : internal::MatcherBase<const std::string&>(impl) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-};
-
-template <>
-class GTEST_API_ Matcher<std::string>
-    : public internal::MatcherBase<std::string> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const std::string&>* impl)
-      : internal::MatcherBase<std::string>(impl) {}
-  explicit Matcher(const MatcherInterface<std::string>* impl)
-      : internal::MatcherBase<std::string>(impl) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-};
-
-#if GTEST_HAS_ABSL
-// The following two specializations allow the user to write str
-// instead of Eq(str) and "foo" instead of Eq("foo") when a absl::string_view
-// matcher is expected.
-template <>
-class GTEST_API_ Matcher<const absl::string_view&>
-    : public internal::MatcherBase<const absl::string_view&> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const absl::string_view&>* impl)
-      : internal::MatcherBase<const absl::string_view&>(impl) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-
-  // Allows the user to pass absl::string_views directly.
-  Matcher(absl::string_view s);  // NOLINT
-};
-
-template <>
-class GTEST_API_ Matcher<absl::string_view>
-    : public internal::MatcherBase<absl::string_view> {
- public:
-  Matcher() {}
-
-  explicit Matcher(const MatcherInterface<const absl::string_view&>* impl)
-      : internal::MatcherBase<absl::string_view>(impl) {}
-  explicit Matcher(const MatcherInterface<absl::string_view>* impl)
-      : internal::MatcherBase<absl::string_view>(impl) {}
-
-  // Allows the user to write str instead of Eq(str) sometimes, where
-  // str is a std::string object.
-  Matcher(const std::string& s);  // NOLINT
-
-  // Allows the user to write "foo" instead of Eq("foo") sometimes.
-  Matcher(const char* s);  // NOLINT
-
-  // Allows the user to pass absl::string_views directly.
-  Matcher(absl::string_view s);  // NOLINT
-};
-#endif  // GTEST_HAS_ABSL
-
-// Prints a matcher in a human-readable format.
-template <typename T>
-std::ostream& operator<<(std::ostream& os, const Matcher<T>& matcher) {
-  matcher.DescribeTo(&os);
-  return os;
-}
-
-// The PolymorphicMatcher class template makes it easy to implement a
-// polymorphic matcher (i.e. a matcher that can match values of more
-// than one type, e.g. Eq(n) and NotNull()).
-//
-// To define a polymorphic matcher, a user should provide an Impl
-// class that has a DescribeTo() method and a DescribeNegationTo()
-// method, and define a member function (or member function template)
-//
-//   bool MatchAndExplain(const Value& value,
-//                        MatchResultListener* listener) const;
-//
-// See the definition of NotNull() for a complete example.
-template <class Impl>
-class PolymorphicMatcher {
- public:
-  explicit PolymorphicMatcher(const Impl& an_impl) : impl_(an_impl) {}
-
-  // Returns a mutable reference to the underlying matcher
-  // implementation object.
-  Impl& mutable_impl() { return impl_; }
-
-  // Returns an immutable reference to the underlying matcher
-  // implementation object.
-  const Impl& impl() const { return impl_; }
-
-  template <typename T>
-  operator Matcher<T>() const {
-    return Matcher<T>(new MonomorphicImpl<const T&>(impl_));
-  }
-
- private:
-  template <typename T>
-  class MonomorphicImpl : public MatcherInterface<T> {
-   public:
-    explicit MonomorphicImpl(const Impl& impl) : impl_(impl) {}
-
-    virtual void DescribeTo(::std::ostream* os) const { impl_.DescribeTo(os); }
-
-    virtual void DescribeNegationTo(::std::ostream* os) const {
-      impl_.DescribeNegationTo(os);
-    }
-
-    virtual bool MatchAndExplain(T x, MatchResultListener* listener) const {
-      return impl_.MatchAndExplain(x, listener);
-    }
-
-   private:
-    const Impl impl_;
-  };
-
-  Impl impl_;
-};
-
-// Creates a matcher from its implementation.
-// DEPRECATED: Especially in the generic code, prefer:
-//   Matcher<T>(new MyMatcherImpl<const T&>(...));
-//
-// MakeMatcher may create a Matcher that accepts its argument by value, which
-// leads to unnecessary copies & lack of support for non-copyable types.
-template <typename T>
-inline Matcher<T> MakeMatcher(const MatcherInterface<T>* impl) {
-  return Matcher<T>(impl);
-}
-
-// Creates a polymorphic matcher from its implementation.  This is
-// easier to use than the PolymorphicMatcher<Impl> constructor as it
-// doesn't require you to explicitly write the template argument, e.g.
-//
-//   MakePolymorphicMatcher(foo);
-// vs
-//   PolymorphicMatcher<TypeOfFoo>(foo);
-template <class Impl>
-inline PolymorphicMatcher<Impl> MakePolymorphicMatcher(const Impl& impl) {
-  return PolymorphicMatcher<Impl>(impl);
-}
-
-namespace internal {
-// Implements a matcher that compares a given value with a
-// pre-supplied value using one of the ==, <=, <, etc, operators.  The
-// two values being compared don't have to have the same type.
-//
-// The matcher defined here is polymorphic (for example, Eq(5) can be
-// used to match an int, a short, a double, etc).  Therefore we use
-// a template type conversion operator in the implementation.
-//
-// The following template definition assumes that the Rhs parameter is
-// a "bare" type (i.e. neither 'const T' nor 'T&').
-template <typename D, typename Rhs, typename Op>
-class ComparisonBase {
- public:
-  explicit ComparisonBase(const Rhs& rhs) : rhs_(rhs) {}
-  template <typename Lhs>
-  operator Matcher<Lhs>() const {
-    return Matcher<Lhs>(new Impl<const Lhs&>(rhs_));
-  }
-
- private:
-  template <typename T>
-  static const T& Unwrap(const T& v) { return v; }
-  template <typename T>
-  static const T& Unwrap(std::reference_wrapper<T> v) { return v; }
-
-  template <typename Lhs, typename = Rhs>
-  class Impl : public MatcherInterface<Lhs> {
-   public:
-    explicit Impl(const Rhs& rhs) : rhs_(rhs) {}
-    bool MatchAndExplain(Lhs lhs,
-                         MatchResultListener* /* listener */) const override {
-      return Op()(lhs, Unwrap(rhs_));
-    }
-    void DescribeTo(::std::ostream* os) const override {
-      *os << D::Desc() << " ";
-      UniversalPrint(Unwrap(rhs_), os);
-    }
-    void DescribeNegationTo(::std::ostream* os) const override {
-      *os << D::NegatedDesc() <<  " ";
-      UniversalPrint(Unwrap(rhs_), os);
-    }
-
-   private:
-    Rhs rhs_;
-  };
-  Rhs rhs_;
-};
-
-template <typename Rhs>
-class EqMatcher : public ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq> {
- public:
-  explicit EqMatcher(const Rhs& rhs)
-      : ComparisonBase<EqMatcher<Rhs>, Rhs, AnyEq>(rhs) { }
-  static const char* Desc() { return "is equal to"; }
-  static const char* NegatedDesc() { return "isn't equal to"; }
-};
-template <typename Rhs>
-class NeMatcher : public ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe> {
- public:
-  explicit NeMatcher(const Rhs& rhs)
-      : ComparisonBase<NeMatcher<Rhs>, Rhs, AnyNe>(rhs) { }
-  static const char* Desc() { return "isn't equal to"; }
-  static const char* NegatedDesc() { return "is equal to"; }
-};
-template <typename Rhs>
-class LtMatcher : public ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt> {
- public:
-  explicit LtMatcher(const Rhs& rhs)
-      : ComparisonBase<LtMatcher<Rhs>, Rhs, AnyLt>(rhs) { }
-  static const char* Desc() { return "is <"; }
-  static const char* NegatedDesc() { return "isn't <"; }
-};
-template <typename Rhs>
-class GtMatcher : public ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt> {
- public:
-  explicit GtMatcher(const Rhs& rhs)
-      : ComparisonBase<GtMatcher<Rhs>, Rhs, AnyGt>(rhs) { }
-  static const char* Desc() { return "is >"; }
-  static const char* NegatedDesc() { return "isn't >"; }
-};
-template <typename Rhs>
-class LeMatcher : public ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe> {
- public:
-  explicit LeMatcher(const Rhs& rhs)
-      : ComparisonBase<LeMatcher<Rhs>, Rhs, AnyLe>(rhs) { }
-  static const char* Desc() { return "is <="; }
-  static const char* NegatedDesc() { return "isn't <="; }
-};
-template <typename Rhs>
-class GeMatcher : public ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe> {
- public:
-  explicit GeMatcher(const Rhs& rhs)
-      : ComparisonBase<GeMatcher<Rhs>, Rhs, AnyGe>(rhs) { }
-  static const char* Desc() { return "is >="; }
-  static const char* NegatedDesc() { return "isn't >="; }
-};
-
-// Implements polymorphic matchers MatchesRegex(regex) and
-// ContainsRegex(regex), which can be used as a Matcher<T> as long as
-// T can be converted to a string.
-class MatchesRegexMatcher {
- public:
-  MatchesRegexMatcher(const RE* regex, bool full_match)
-      : regex_(regex), full_match_(full_match) {}
-
-#if GTEST_HAS_ABSL
-  bool MatchAndExplain(const absl::string_view& s,
-                       MatchResultListener* listener) const {
-    return MatchAndExplain(std::string(s), listener);
-  }
-#endif  // GTEST_HAS_ABSL
-
-  // Accepts pointer types, particularly:
-  //   const char*
-  //   char*
-  //   const wchar_t*
-  //   wchar_t*
-  template <typename CharType>
-  bool MatchAndExplain(CharType* s, MatchResultListener* listener) const {
-    return s != nullptr && MatchAndExplain(std::string(s), listener);
-  }
-
-  // Matches anything that can convert to std::string.
-  //
-  // This is a template, not just a plain function with const std::string&,
-  // because absl::string_view has some interfering non-explicit constructors.
-  template <class MatcheeStringType>
-  bool MatchAndExplain(const MatcheeStringType& s,
-                       MatchResultListener* /* listener */) const {
-    const std::string& s2(s);
-    return full_match_ ? RE::FullMatch(s2, *regex_)
-                       : RE::PartialMatch(s2, *regex_);
-  }
-
-  void DescribeTo(::std::ostream* os) const {
-    *os << (full_match_ ? "matches" : "contains") << " regular expression ";
-    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
-  }
-
-  void DescribeNegationTo(::std::ostream* os) const {
-    *os << "doesn't " << (full_match_ ? "match" : "contain")
-        << " regular expression ";
-    UniversalPrinter<std::string>::Print(regex_->pattern(), os);
-  }
-
- private:
-  const std::shared_ptr<const RE> regex_;
-  const bool full_match_;
-};
-}  // namespace internal
-
-// Matches a string that fully matches regular expression 'regex'.
-// The matcher takes ownership of 'regex'.
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
-    const internal::RE* regex) {
-  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, true));
-}
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> MatchesRegex(
-    const std::string& regex) {
-  return MatchesRegex(new internal::RE(regex));
-}
-
-// Matches a string that contains regular expression 'regex'.
-// The matcher takes ownership of 'regex'.
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
-    const internal::RE* regex) {
-  return MakePolymorphicMatcher(internal::MatchesRegexMatcher(regex, false));
-}
-inline PolymorphicMatcher<internal::MatchesRegexMatcher> ContainsRegex(
-    const std::string& regex) {
-  return ContainsRegex(new internal::RE(regex));
-}
-
-// Creates a polymorphic matcher that matches anything equal to x.
-// Note: if the parameter of Eq() were declared as const T&, Eq("foo")
-// wouldn't compile.
-template <typename T>
-inline internal::EqMatcher<T> Eq(T x) { return internal::EqMatcher<T>(x); }
-
-// Constructs a Matcher<T> from a 'value' of type T.  The constructed
-// matcher matches any value that's equal to 'value'.
-template <typename T>
-Matcher<T>::Matcher(T value) { *this = Eq(value); }
-
-// Creates a monomorphic matcher that matches anything with type Lhs
-// and equal to rhs.  A user may need to use this instead of Eq(...)
-// in order to resolve an overloading ambiguity.
-//
-// TypedEq<T>(x) is just a convenient short-hand for Matcher<T>(Eq(x))
-// or Matcher<T>(x), but more readable than the latter.
-//
-// We could define similar monomorphic matchers for other comparison
-// operations (e.g. TypedLt, TypedGe, and etc), but decided not to do
-// it yet as those are used much less than Eq() in practice.  A user
-// can always write Matcher<T>(Lt(5)) to be explicit about the type,
-// for example.
-template <typename Lhs, typename Rhs>
-inline Matcher<Lhs> TypedEq(const Rhs& rhs) { return Eq(rhs); }
-
-// Creates a polymorphic matcher that matches anything >= x.
-template <typename Rhs>
-inline internal::GeMatcher<Rhs> Ge(Rhs x) {
-  return internal::GeMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything > x.
-template <typename Rhs>
-inline internal::GtMatcher<Rhs> Gt(Rhs x) {
-  return internal::GtMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything <= x.
-template <typename Rhs>
-inline internal::LeMatcher<Rhs> Le(Rhs x) {
-  return internal::LeMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything < x.
-template <typename Rhs>
-inline internal::LtMatcher<Rhs> Lt(Rhs x) {
-  return internal::LtMatcher<Rhs>(x);
-}
-
-// Creates a polymorphic matcher that matches anything != x.
-template <typename Rhs>
-inline internal::NeMatcher<Rhs> Ne(Rhs x) {
-  return internal::NeMatcher<Rhs>(x);
-}
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251 5046
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_MATCHERS_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-message.h b/3rdparty/gtest/include/gtest/gtest-message.h
deleted file mode 100644
index 4a80e11e..00000000
--- a/3rdparty/gtest/include/gtest/gtest-message.h
+++ /dev/null
@@ -1,218 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the Message class.
-//
-// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
-// leave some internal implementation details in this header file.
-// They are clearly marked by comments like this:
-//
-//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-//
-// Such code is NOT meant to be used by a user directly, and is subject
-// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
-// program!
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-#define GTEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
-
-#include <limits>
-#include <memory>
-
-#include "gtest/internal/gtest-port.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// Ensures that there is at least one operator<< in the global namespace.
-// See Message& operator<<(...) below for why.
-void operator<<(const testing::internal::Secret&, int);
-
-namespace testing {
-
-// The Message class works like an ostream repeater.
-//
-// Typical usage:
-//
-//   1. You stream a bunch of values to a Message object.
-//      It will remember the text in a stringstream.
-//   2. Then you stream the Message object to an ostream.
-//      This causes the text in the Message to be streamed
-//      to the ostream.
-//
-// For example;
-//
-//   testing::Message foo;
-//   foo << 1 << " != " << 2;
-//   std::cout << foo;
-//
-// will print "1 != 2".
-//
-// Message is not intended to be inherited from.  In particular, its
-// destructor is not virtual.
-//
-// Note that stringstream behaves differently in gcc and in MSVC.  You
-// can stream a NULL char pointer to it in the former, but not in the
-// latter (it causes an access violation if you do).  The Message
-// class hides this difference by treating a NULL char pointer as
-// "(null)".
-class GTEST_API_ Message {
- private:
-  // The type of basic IO manipulators (endl, ends, and flush) for
-  // narrow streams.
-  typedef std::ostream& (*BasicNarrowIoManip)(std::ostream&);
-
- public:
-  // Constructs an empty Message.
-  Message();
-
-  // Copy constructor.
-  Message(const Message& msg) : ss_(new ::std::stringstream) {  // NOLINT
-    *ss_ << msg.GetString();
-  }
-
-  // Constructs a Message from a C-string.
-  explicit Message(const char* str) : ss_(new ::std::stringstream) {
-    *ss_ << str;
-  }
-
-  // Streams a non-pointer value to this object.
-  template <typename T>
-  inline Message& operator <<(const T& val) {
-    // Some libraries overload << for STL containers.  These
-    // overloads are defined in the global namespace instead of ::std.
-    //
-    // C++'s symbol lookup rule (i.e. Koenig lookup) says that these
-    // overloads are visible in either the std namespace or the global
-    // namespace, but not other namespaces, including the testing
-    // namespace which Google Test's Message class is in.
-    //
-    // To allow STL containers (and other types that has a << operator
-    // defined in the global namespace) to be used in Google Test
-    // assertions, testing::Message must access the custom << operator
-    // from the global namespace.  With this using declaration,
-    // overloads of << defined in the global namespace and those
-    // visible via Koenig lookup are both exposed in this function.
-    using ::operator <<;
-    *ss_ << val;
-    return *this;
-  }
-
-  // Streams a pointer value to this object.
-  //
-  // This function is an overload of the previous one.  When you
-  // stream a pointer to a Message, this definition will be used as it
-  // is more specialized.  (The C++ Standard, section
-  // [temp.func.order].)  If you stream a non-pointer, then the
-  // previous definition will be used.
-  //
-  // The reason for this overload is that streaming a NULL pointer to
-  // ostream is undefined behavior.  Depending on the compiler, you
-  // may get "0", "(nil)", "(null)", or an access violation.  To
-  // ensure consistent result across compilers, we always treat NULL
-  // as "(null)".
-  template <typename T>
-  inline Message& operator <<(T* const& pointer) {  // NOLINT
-    if (pointer == nullptr) {
-      *ss_ << "(null)";
-    } else {
-      *ss_ << pointer;
-    }
-    return *this;
-  }
-
-  // Since the basic IO manipulators are overloaded for both narrow
-  // and wide streams, we have to provide this specialized definition
-  // of operator <<, even though its body is the same as the
-  // templatized version above.  Without this definition, streaming
-  // endl or other basic IO manipulators to Message will confuse the
-  // compiler.
-  Message& operator <<(BasicNarrowIoManip val) {
-    *ss_ << val;
-    return *this;
-  }
-
-  // Instead of 1/0, we want to see true/false for bool values.
-  Message& operator <<(bool b) {
-    return *this << (b ? "true" : "false");
-  }
-
-  // These two overloads allow streaming a wide C string to a Message
-  // using the UTF-8 encoding.
-  Message& operator <<(const wchar_t* wide_c_str);
-  Message& operator <<(wchar_t* wide_c_str);
-
-#if GTEST_HAS_STD_WSTRING
-  // Converts the given wide string to a narrow string using the UTF-8
-  // encoding, and streams the result to this Message object.
-  Message& operator <<(const ::std::wstring& wstr);
-#endif  // GTEST_HAS_STD_WSTRING
-
-  // Gets the text streamed to this object so far as an std::string.
-  // Each '\0' character in the buffer is replaced with "\\0".
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  std::string GetString() const;
-
- private:
-  // We'll hold the text streamed to this object here.
-  const std::unique_ptr< ::std::stringstream> ss_;
-
-  // We declare (but don't implement) this to prevent the compiler
-  // from implementing the assignment operator.
-  void operator=(const Message&);
-};
-
-// Streams a Message to an ostream.
-inline std::ostream& operator <<(std::ostream& os, const Message& sb) {
-  return os << sb.GetString();
-}
-
-namespace internal {
-
-// Converts a streamable value to an std::string.  A NULL pointer is
-// converted to "(null)".  When the input value is a ::string,
-// ::std::string, ::wstring, or ::std::wstring object, each NUL
-// character in it is replaced with "\\0".
-template <typename T>
-std::string StreamableToString(const T& streamable) {
-  return (Message() << streamable).GetString();
-}
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_MESSAGE_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-param-test.h b/3rdparty/gtest/include/gtest/gtest-param-test.h
deleted file mode 100644
index c2e6eae3..00000000
--- a/3rdparty/gtest/include/gtest/gtest-param-test.h
+++ /dev/null
@@ -1,503 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Macros and functions for implementing parameterized tests
-// in Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file is generated by a SCRIPT.  DO NOT EDIT BY HAND!
-//
-// GOOGLETEST_CM0001 DO NOT DELETE
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
-
-
-// Value-parameterized tests allow you to test your code with different
-// parameters without writing multiple copies of the same test.
-//
-// Here is how you use value-parameterized tests:
-
-#if 0
-
-// To write value-parameterized tests, first you should define a fixture
-// class. It is usually derived from testing::TestWithParam<T> (see below for
-// another inheritance scheme that's sometimes useful in more complicated
-// class hierarchies), where the type of your parameter values.
-// TestWithParam<T> is itself derived from testing::Test. T can be any
-// copyable type. If it's a raw pointer, you are responsible for managing the
-// lifespan of the pointed values.
-
-class FooTest : public ::testing::TestWithParam<const char*> {
-  // You can implement all the usual class fixture members here.
-};
-
-// Then, use the TEST_P macro to define as many parameterized tests
-// for this fixture as you want. The _P suffix is for "parameterized"
-// or "pattern", whichever you prefer to think.
-
-TEST_P(FooTest, DoesBlah) {
-  // Inside a test, access the test parameter with the GetParam() method
-  // of the TestWithParam<T> class:
-  EXPECT_TRUE(foo.Blah(GetParam()));
-  ...
-}
-
-TEST_P(FooTest, HasBlahBlah) {
-  ...
-}
-
-// Finally, you can use INSTANTIATE_TEST_SUITE_P to instantiate the test
-// case with any set of parameters you want. Google Test defines a number
-// of functions for generating test parameters. They return what we call
-// (surprise!) parameter generators. Here is a summary of them, which
-// are all in the testing namespace:
-//
-//
-//  Range(begin, end [, step]) - Yields values {begin, begin+step,
-//                               begin+step+step, ...}. The values do not
-//                               include end. step defaults to 1.
-//  Values(v1, v2, ..., vN)    - Yields values {v1, v2, ..., vN}.
-//  ValuesIn(container)        - Yields values from a C-style array, an STL
-//  ValuesIn(begin,end)          container, or an iterator range [begin, end).
-//  Bool()                     - Yields sequence {false, true}.
-//  Combine(g1, g2, ..., gN)   - Yields all combinations (the Cartesian product
-//                               for the math savvy) of the values generated
-//                               by the N generators.
-//
-// For more details, see comments at the definitions of these functions below
-// in this file.
-//
-// The following statement will instantiate tests from the FooTest test suite
-// each with parameter values "meeny", "miny", and "moe".
-
-INSTANTIATE_TEST_SUITE_P(InstantiationName,
-                         FooTest,
-                         Values("meeny", "miny", "moe"));
-
-// To distinguish different instances of the pattern, (yes, you
-// can instantiate it more than once) the first argument to the
-// INSTANTIATE_TEST_SUITE_P macro is a prefix that will be added to the
-// actual test suite name. Remember to pick unique prefixes for different
-// instantiations. The tests from the instantiation above will have
-// these names:
-//
-//    * InstantiationName/FooTest.DoesBlah/0 for "meeny"
-//    * InstantiationName/FooTest.DoesBlah/1 for "miny"
-//    * InstantiationName/FooTest.DoesBlah/2 for "moe"
-//    * InstantiationName/FooTest.HasBlahBlah/0 for "meeny"
-//    * InstantiationName/FooTest.HasBlahBlah/1 for "miny"
-//    * InstantiationName/FooTest.HasBlahBlah/2 for "moe"
-//
-// You can use these names in --gtest_filter.
-//
-// This statement will instantiate all tests from FooTest again, each
-// with parameter values "cat" and "dog":
-
-const char* pets[] = {"cat", "dog"};
-INSTANTIATE_TEST_SUITE_P(AnotherInstantiationName, FooTest, ValuesIn(pets));
-
-// The tests from the instantiation above will have these names:
-//
-//    * AnotherInstantiationName/FooTest.DoesBlah/0 for "cat"
-//    * AnotherInstantiationName/FooTest.DoesBlah/1 for "dog"
-//    * AnotherInstantiationName/FooTest.HasBlahBlah/0 for "cat"
-//    * AnotherInstantiationName/FooTest.HasBlahBlah/1 for "dog"
-//
-// Please note that INSTANTIATE_TEST_SUITE_P will instantiate all tests
-// in the given test suite, whether their definitions come before or
-// AFTER the INSTANTIATE_TEST_SUITE_P statement.
-//
-// Please also note that generator expressions (including parameters to the
-// generators) are evaluated in InitGoogleTest(), after main() has started.
-// This allows the user on one hand, to adjust generator parameters in order
-// to dynamically determine a set of tests to run and on the other hand,
-// give the user a chance to inspect the generated tests with Google Test
-// reflection API before RUN_ALL_TESTS() is executed.
-//
-// You can see samples/sample7_unittest.cc and samples/sample8_unittest.cc
-// for more examples.
-//
-// In the future, we plan to publish the API for defining new parameter
-// generators. But for now this interface remains part of the internal
-// implementation and is subject to change.
-//
-//
-// A parameterized test fixture must be derived from testing::Test and from
-// testing::WithParamInterface<T>, where T is the type of the parameter
-// values. Inheriting from TestWithParam<T> satisfies that requirement because
-// TestWithParam<T> inherits from both Test and WithParamInterface. In more
-// complicated hierarchies, however, it is occasionally useful to inherit
-// separately from Test and WithParamInterface. For example:
-
-class BaseTest : public ::testing::Test {
-  // You can inherit all the usual members for a non-parameterized test
-  // fixture here.
-};
-
-class DerivedTest : public BaseTest, public ::testing::WithParamInterface<int> {
-  // The usual test fixture members go here too.
-};
-
-TEST_F(BaseTest, HasFoo) {
-  // This is an ordinary non-parameterized test.
-}
-
-TEST_P(DerivedTest, DoesBlah) {
-  // GetParam works just the same here as if you inherit from TestWithParam.
-  EXPECT_TRUE(foo.Blah(GetParam()));
-}
-
-#endif  // 0
-
-#include <iterator>
-#include <utility>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-param-util.h"
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-
-// Functions producing parameter generators.
-//
-// Google Test uses these generators to produce parameters for value-
-// parameterized tests. When a parameterized test suite is instantiated
-// with a particular generator, Google Test creates and runs tests
-// for each element in the sequence produced by the generator.
-//
-// In the following sample, tests from test suite FooTest are instantiated
-// each three times with parameter values 3, 5, and 8:
-//
-// class FooTest : public TestWithParam<int> { ... };
-//
-// TEST_P(FooTest, TestThis) {
-// }
-// TEST_P(FooTest, TestThat) {
-// }
-// INSTANTIATE_TEST_SUITE_P(TestSequence, FooTest, Values(3, 5, 8));
-//
-
-// Range() returns generators providing sequences of values in a range.
-//
-// Synopsis:
-// Range(start, end)
-//   - returns a generator producing a sequence of values {start, start+1,
-//     start+2, ..., }.
-// Range(start, end, step)
-//   - returns a generator producing a sequence of values {start, start+step,
-//     start+step+step, ..., }.
-// Notes:
-//   * The generated sequences never include end. For example, Range(1, 5)
-//     returns a generator producing a sequence {1, 2, 3, 4}. Range(1, 9, 2)
-//     returns a generator producing {1, 3, 5, 7}.
-//   * start and end must have the same type. That type may be any integral or
-//     floating-point type or a user defined type satisfying these conditions:
-//     * It must be assignable (have operator=() defined).
-//     * It must have operator+() (operator+(int-compatible type) for
-//       two-operand version).
-//     * It must have operator<() defined.
-//     Elements in the resulting sequences will also have that type.
-//   * Condition start < end must be satisfied in order for resulting sequences
-//     to contain any elements.
-//
-template <typename T, typename IncrementT>
-internal::ParamGenerator<T> Range(T start, T end, IncrementT step) {
-  return internal::ParamGenerator<T>(
-      new internal::RangeGenerator<T, IncrementT>(start, end, step));
-}
-
-template <typename T>
-internal::ParamGenerator<T> Range(T start, T end) {
-  return Range(start, end, 1);
-}
-
-// ValuesIn() function allows generation of tests with parameters coming from
-// a container.
-//
-// Synopsis:
-// ValuesIn(const T (&array)[N])
-//   - returns a generator producing sequences with elements from
-//     a C-style array.
-// ValuesIn(const Container& container)
-//   - returns a generator producing sequences with elements from
-//     an STL-style container.
-// ValuesIn(Iterator begin, Iterator end)
-//   - returns a generator producing sequences with elements from
-//     a range [begin, end) defined by a pair of STL-style iterators. These
-//     iterators can also be plain C pointers.
-//
-// Please note that ValuesIn copies the values from the containers
-// passed in and keeps them to generate tests in RUN_ALL_TESTS().
-//
-// Examples:
-//
-// This instantiates tests from test suite StringTest
-// each with C-string values of "foo", "bar", and "baz":
-//
-// const char* strings[] = {"foo", "bar", "baz"};
-// INSTANTIATE_TEST_SUITE_P(StringSequence, StringTest, ValuesIn(strings));
-//
-// This instantiates tests from test suite StlStringTest
-// each with STL strings with values "a" and "b":
-//
-// ::std::vector< ::std::string> GetParameterStrings() {
-//   ::std::vector< ::std::string> v;
-//   v.push_back("a");
-//   v.push_back("b");
-//   return v;
-// }
-//
-// INSTANTIATE_TEST_SUITE_P(CharSequence,
-//                          StlStringTest,
-//                          ValuesIn(GetParameterStrings()));
-//
-//
-// This will also instantiate tests from CharTest
-// each with parameter values 'a' and 'b':
-//
-// ::std::list<char> GetParameterChars() {
-//   ::std::list<char> list;
-//   list.push_back('a');
-//   list.push_back('b');
-//   return list;
-// }
-// ::std::list<char> l = GetParameterChars();
-// INSTANTIATE_TEST_SUITE_P(CharSequence2,
-//                          CharTest,
-//                          ValuesIn(l.begin(), l.end()));
-//
-template <typename ForwardIterator>
-internal::ParamGenerator<
-    typename std::iterator_traits<ForwardIterator>::value_type>
-ValuesIn(ForwardIterator begin, ForwardIterator end) {
-  typedef typename std::iterator_traits<ForwardIterator>::value_type ParamType;
-  return internal::ParamGenerator<ParamType>(
-      new internal::ValuesInIteratorRangeGenerator<ParamType>(begin, end));
-}
-
-template <typename T, size_t N>
-internal::ParamGenerator<T> ValuesIn(const T (&array)[N]) {
-  return ValuesIn(array, array + N);
-}
-
-template <class Container>
-internal::ParamGenerator<typename Container::value_type> ValuesIn(
-    const Container& container) {
-  return ValuesIn(container.begin(), container.end());
-}
-
-// Values() allows generating tests from explicitly specified list of
-// parameters.
-//
-// Synopsis:
-// Values(T v1, T v2, ..., T vN)
-//   - returns a generator producing sequences with elements v1, v2, ..., vN.
-//
-// For example, this instantiates tests from test suite BarTest each
-// with values "one", "two", and "three":
-//
-// INSTANTIATE_TEST_SUITE_P(NumSequence,
-//                          BarTest,
-//                          Values("one", "two", "three"));
-//
-// This instantiates tests from test suite BazTest each with values 1, 2, 3.5.
-// The exact type of values will depend on the type of parameter in BazTest.
-//
-// INSTANTIATE_TEST_SUITE_P(FloatingNumbers, BazTest, Values(1, 2, 3.5));
-//
-//
-template <typename... T>
-internal::ValueArray<T...> Values(T... v) {
-  return internal::ValueArray<T...>(std::move(v)...);
-}
-
-// Bool() allows generating tests with parameters in a set of (false, true).
-//
-// Synopsis:
-// Bool()
-//   - returns a generator producing sequences with elements {false, true}.
-//
-// It is useful when testing code that depends on Boolean flags. Combinations
-// of multiple flags can be tested when several Bool()'s are combined using
-// Combine() function.
-//
-// In the following example all tests in the test suite FlagDependentTest
-// will be instantiated twice with parameters false and true.
-//
-// class FlagDependentTest : public testing::TestWithParam<bool> {
-//   virtual void SetUp() {
-//     external_flag = GetParam();
-//   }
-// }
-// INSTANTIATE_TEST_SUITE_P(BoolSequence, FlagDependentTest, Bool());
-//
-inline internal::ParamGenerator<bool> Bool() {
-  return Values(false, true);
-}
-
-// Combine() allows the user to combine two or more sequences to produce
-// values of a Cartesian product of those sequences' elements.
-//
-// Synopsis:
-// Combine(gen1, gen2, ..., genN)
-//   - returns a generator producing sequences with elements coming from
-//     the Cartesian product of elements from the sequences generated by
-//     gen1, gen2, ..., genN. The sequence elements will have a type of
-//     std::tuple<T1, T2, ..., TN> where T1, T2, ..., TN are the types
-//     of elements from sequences produces by gen1, gen2, ..., genN.
-//
-// Combine can have up to 10 arguments.
-//
-// Example:
-//
-// This will instantiate tests in test suite AnimalTest each one with
-// the parameter values tuple("cat", BLACK), tuple("cat", WHITE),
-// tuple("dog", BLACK), and tuple("dog", WHITE):
-//
-// enum Color { BLACK, GRAY, WHITE };
-// class AnimalTest
-//     : public testing::TestWithParam<std::tuple<const char*, Color> > {...};
-//
-// TEST_P(AnimalTest, AnimalLooksNice) {...}
-//
-// INSTANTIATE_TEST_SUITE_P(AnimalVariations, AnimalTest,
-//                          Combine(Values("cat", "dog"),
-//                                  Values(BLACK, WHITE)));
-//
-// This will instantiate tests in FlagDependentTest with all variations of two
-// Boolean flags:
-//
-// class FlagDependentTest
-//     : public testing::TestWithParam<std::tuple<bool, bool> > {
-//   virtual void SetUp() {
-//     // Assigns external_flag_1 and external_flag_2 values from the tuple.
-//     std::tie(external_flag_1, external_flag_2) = GetParam();
-//   }
-// };
-//
-// TEST_P(FlagDependentTest, TestFeature1) {
-//   // Test your code using external_flag_1 and external_flag_2 here.
-// }
-// INSTANTIATE_TEST_SUITE_P(TwoBoolSequence, FlagDependentTest,
-//                          Combine(Bool(), Bool()));
-//
-template <typename... Generator>
-internal::CartesianProductHolder<Generator...> Combine(const Generator&... g) {
-  return internal::CartesianProductHolder<Generator...>(g...);
-}
-
-#define TEST_P(test_suite_name, test_name)                                     \
-  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                     \
-      : public test_suite_name {                                               \
-   public:                                                                     \
-    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {}                    \
-    virtual void TestBody();                                                   \
-                                                                               \
-   private:                                                                    \
-    static int AddToRegistry() {                                               \
-      ::testing::UnitTest::GetInstance()                                       \
-          ->parameterized_test_registry()                                      \
-          .GetTestSuitePatternHolder<test_suite_name>(                         \
-              #test_suite_name,                                                \
-              ::testing::internal::CodeLocation(__FILE__, __LINE__))           \
-          ->AddTestPattern(                                                    \
-              GTEST_STRINGIFY_(test_suite_name), GTEST_STRINGIFY_(test_name),  \
-              new ::testing::internal::TestMetaFactory<GTEST_TEST_CLASS_NAME_( \
-                  test_suite_name, test_name)>());                             \
-      return 0;                                                                \
-    }                                                                          \
-    static int gtest_registering_dummy_ GTEST_ATTRIBUTE_UNUSED_;               \
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,    \
-                                                           test_name));        \
-  };                                                                           \
-  int GTEST_TEST_CLASS_NAME_(test_suite_name,                                  \
-                             test_name)::gtest_registering_dummy_ =            \
-      GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::AddToRegistry();     \
-  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
-
-// The last argument to INSTANTIATE_TEST_SUITE_P allows the user to specify
-// generator and an optional function or functor that generates custom test name
-// suffixes based on the test parameters. Such a function or functor should
-// accept one argument of type testing::TestParamInfo<class ParamType>, and
-// return std::string.
-//
-// testing::PrintToStringParamName is a builtin test suffix generator that
-// returns the value of testing::PrintToString(GetParam()).
-//
-// Note: test names must be non-empty, unique, and may only contain ASCII
-// alphanumeric characters or underscore. Because PrintToString adds quotes
-// to std::string and C strings, it won't work for these types.
-
-#define GTEST_EXPAND_(arg) arg
-#define GTEST_GET_FIRST_(first, ...) first
-#define GTEST_GET_SECOND_(first, second, ...) second
-
-#define INSTANTIATE_TEST_SUITE_P(prefix, test_suite_name, ...)                \
-  static ::testing::internal::ParamGenerator<test_suite_name::ParamType>      \
-      gtest_##prefix##test_suite_name##_EvalGenerator_() {                    \
-    return GTEST_EXPAND_(GTEST_GET_FIRST_(__VA_ARGS__, DUMMY_PARAM_));        \
-  }                                                                           \
-  static ::std::string gtest_##prefix##test_suite_name##_EvalGenerateName_(   \
-      const ::testing::TestParamInfo<test_suite_name::ParamType>& info) {     \
-    if (::testing::internal::AlwaysFalse()) {                                 \
-      ::testing::internal::TestNotEmpty(GTEST_EXPAND_(GTEST_GET_SECOND_(      \
-          __VA_ARGS__,                                                        \
-          ::testing::internal::DefaultParamName<test_suite_name::ParamType>,  \
-          DUMMY_PARAM_)));                                                    \
-      auto t = std::make_tuple(__VA_ARGS__);                                  \
-      static_assert(std::tuple_size<decltype(t)>::value <= 2,                 \
-                    "Too Many Args!");                                        \
-    }                                                                         \
-    return ((GTEST_EXPAND_(GTEST_GET_SECOND_(                                 \
-        __VA_ARGS__,                                                          \
-        ::testing::internal::DefaultParamName<test_suite_name::ParamType>,    \
-        DUMMY_PARAM_))))(info);                                               \
-  }                                                                           \
-  static int gtest_##prefix##test_suite_name##_dummy_                         \
-      GTEST_ATTRIBUTE_UNUSED_ =                                               \
-          ::testing::UnitTest::GetInstance()                                  \
-              ->parameterized_test_registry()                                 \
-              .GetTestSuitePatternHolder<test_suite_name>(                    \
-                  #test_suite_name,                                           \
-                  ::testing::internal::CodeLocation(__FILE__, __LINE__))      \
-              ->AddTestSuiteInstantiation(                                    \
-                  #prefix, &gtest_##prefix##test_suite_name##_EvalGenerator_, \
-                  &gtest_##prefix##test_suite_name##_EvalGenerateName_,       \
-                  __FILE__, __LINE__)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define INSTANTIATE_TEST_CASE_P                                            \
-  static_assert(::testing::internal::InstantiateTestCase_P_IsDeprecated(), \
-                "");                                                       \
-  INSTANTIATE_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PARAM_TEST_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-printers.h b/3rdparty/gtest/include/gtest/gtest-printers.h
deleted file mode 100644
index 56a05450..00000000
--- a/3rdparty/gtest/include/gtest/gtest-printers.h
+++ /dev/null
@@ -1,928 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// A user can teach this function how to print a class type T by
-// defining either operator<<() or PrintTo() in the namespace that
-// defines T.  More specifically, the FIRST defined function in the
-// following list will be used (assuming T is defined in namespace
-// foo):
-//
-//   1. foo::PrintTo(const T&, ostream*)
-//   2. operator<<(ostream&, const T&) defined in either foo or the
-//      global namespace.
-//
-// However if T is an STL-style container then it is printed element-wise
-// unless foo::PrintTo(const T&, ostream*) is defined. Note that
-// operator<<() is ignored for container types.
-//
-// If none of the above is defined, it will print the debug string of
-// the value if it is a protocol buffer, or print the raw bytes in the
-// value otherwise.
-//
-// To aid debugging: when T is a reference type, the address of the
-// value is also printed; when T is a (const) char pointer, both the
-// pointer value and the NUL-terminated string it points to are
-// printed.
-//
-// We also provide some convenient wrappers:
-//
-//   // Prints a value to a string.  For a (const or not) char
-//   // pointer, the NUL-terminated string (but not the pointer) is
-//   // printed.
-//   std::string ::testing::PrintToString(const T& value);
-//
-//   // Prints a value tersely: for a reference type, the referenced
-//   // value (but not the address) is printed; for a (const or not) char
-//   // pointer, the NUL-terminated string (but not the pointer) is
-//   // printed.
-//   void ::testing::internal::UniversalTersePrint(const T& value, ostream*);
-//
-//   // Prints value using the type inferred by the compiler.  The difference
-//   // from UniversalTersePrint() is that this function prints both the
-//   // pointer and the NUL-terminated string for a (const or not) char pointer.
-//   void ::testing::internal::UniversalPrint(const T& value, ostream*);
-//
-//   // Prints the fields of a tuple tersely to a string vector, one
-//   // element for each field. Tuple support must be enabled in
-//   // gtest-port.h.
-//   std::vector<string> UniversalTersePrintTupleFieldsToStrings(
-//       const Tuple& value);
-//
-// Known limitation:
-//
-// The print primitives print the elements of an STL-style container
-// using the compiler-inferred type of *iter where iter is a
-// const_iterator of the container.  When const_iterator is an input
-// iterator but not a forward iterator, this inferred type may not
-// match value_type, and the print output may be incorrect.  In
-// practice, this is rarely a problem as for most containers
-// const_iterator is a forward iterator.  We'll fix this if there's an
-// actual need for it.  Note that this fix cannot rely on value_type
-// being defined as many user-defined container types don't have
-// value_type.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
-
-#include <functional>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <string>
-#include <tuple>
-#include <type_traits>
-#include <utility>
-#include <vector>
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_HAS_ABSL
-#include "absl/strings/string_view.h"
-#include "absl/types/optional.h"
-#include "absl/types/variant.h"
-#endif  // GTEST_HAS_ABSL
-
-namespace testing {
-
-// Definitions in the 'internal' and 'internal2' name spaces are
-// subject to change without notice.  DO NOT USE THEM IN USER CODE!
-namespace internal2 {
-
-// Prints the given number of bytes in the given object to the given
-// ostream.
-GTEST_API_ void PrintBytesInObjectTo(const unsigned char* obj_bytes,
-                                     size_t count,
-                                     ::std::ostream* os);
-
-// For selecting which printer to use when a given type has neither <<
-// nor PrintTo().
-enum TypeKind {
-  kProtobuf,              // a protobuf type
-  kConvertibleToInteger,  // a type implicitly convertible to BiggestInt
-                          // (e.g. a named or unnamed enum type)
-#if GTEST_HAS_ABSL
-  kConvertibleToStringView,  // a type implicitly convertible to
-                             // absl::string_view
-#endif
-  kOtherType  // anything else
-};
-
-// TypeWithoutFormatter<T, kTypeKind>::PrintValue(value, os) is called
-// by the universal printer to print a value of type T when neither
-// operator<< nor PrintTo() is defined for T, where kTypeKind is the
-// "kind" of T as defined by enum TypeKind.
-template <typename T, TypeKind kTypeKind>
-class TypeWithoutFormatter {
- public:
-  // This default version is called when kTypeKind is kOtherType.
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    PrintBytesInObjectTo(
-        static_cast<const unsigned char*>(
-            reinterpret_cast<const void*>(std::addressof(value))),
-        sizeof(value), os);
-  }
-};
-
-// We print a protobuf using its ShortDebugString() when the string
-// doesn't exceed this many characters; otherwise we print it using
-// DebugString() for better readability.
-const size_t kProtobufOneLinerMaxLength = 50;
-
-template <typename T>
-class TypeWithoutFormatter<T, kProtobuf> {
- public:
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    std::string pretty_str = value.ShortDebugString();
-    if (pretty_str.length() > kProtobufOneLinerMaxLength) {
-      pretty_str = "\n" + value.DebugString();
-    }
-    *os << ("<" + pretty_str + ">");
-  }
-};
-
-template <typename T>
-class TypeWithoutFormatter<T, kConvertibleToInteger> {
- public:
-  // Since T has no << operator or PrintTo() but can be implicitly
-  // converted to BiggestInt, we print it as a BiggestInt.
-  //
-  // Most likely T is an enum type (either named or unnamed), in which
-  // case printing it as an integer is the desired behavior.  In case
-  // T is not an enum, printing it as an integer is the best we can do
-  // given that it has no user-defined printer.
-  static void PrintValue(const T& value, ::std::ostream* os) {
-    const internal::BiggestInt kBigInt = value;
-    *os << kBigInt;
-  }
-};
-
-#if GTEST_HAS_ABSL
-template <typename T>
-class TypeWithoutFormatter<T, kConvertibleToStringView> {
- public:
-  // Since T has neither operator<< nor PrintTo() but can be implicitly
-  // converted to absl::string_view, we print it as a absl::string_view.
-  //
-  // Note: the implementation is further below, as it depends on
-  // internal::PrintTo symbol which is defined later in the file.
-  static void PrintValue(const T& value, ::std::ostream* os);
-};
-#endif
-
-// Prints the given value to the given ostream.  If the value is a
-// protocol message, its debug string is printed; if it's an enum or
-// of a type implicitly convertible to BiggestInt, it's printed as an
-// integer; otherwise the bytes in the value are printed.  This is
-// what UniversalPrinter<T>::Print() does when it knows nothing about
-// type T and T has neither << operator nor PrintTo().
-//
-// A user can override this behavior for a class type Foo by defining
-// a << operator in the namespace where Foo is defined.
-//
-// We put this operator in namespace 'internal2' instead of 'internal'
-// to simplify the implementation, as much code in 'internal' needs to
-// use << in STL, which would conflict with our own << were it defined
-// in 'internal'.
-//
-// Note that this operator<< takes a generic std::basic_ostream<Char,
-// CharTraits> type instead of the more restricted std::ostream.  If
-// we define it to take an std::ostream instead, we'll get an
-// "ambiguous overloads" compiler error when trying to print a type
-// Foo that supports streaming to std::basic_ostream<Char,
-// CharTraits>, as the compiler cannot tell whether
-// operator<<(std::ostream&, const T&) or
-// operator<<(std::basic_stream<Char, CharTraits>, const Foo&) is more
-// specific.
-template <typename Char, typename CharTraits, typename T>
-::std::basic_ostream<Char, CharTraits>& operator<<(
-    ::std::basic_ostream<Char, CharTraits>& os, const T& x) {
-  TypeWithoutFormatter<T, (internal::IsAProtocolMessage<T>::value
-                               ? kProtobuf
-                               : std::is_convertible<
-                                     const T&, internal::BiggestInt>::value
-                                     ? kConvertibleToInteger
-                                     :
-#if GTEST_HAS_ABSL
-                                     std::is_convertible<
-                                         const T&, absl::string_view>::value
-                                         ? kConvertibleToStringView
-                                         :
-#endif
-                                         kOtherType)>::PrintValue(x, &os);
-  return os;
-}
-
-}  // namespace internal2
-}  // namespace testing
-
-// This namespace MUST NOT BE NESTED IN ::testing, or the name look-up
-// magic needed for implementing UniversalPrinter won't work.
-namespace testing_internal {
-
-// Used to print a value that is not an STL-style container when the
-// user doesn't define PrintTo() for it.
-template <typename T>
-void DefaultPrintNonContainerTo(const T& value, ::std::ostream* os) {
-  // With the following statement, during unqualified name lookup,
-  // testing::internal2::operator<< appears as if it was declared in
-  // the nearest enclosing namespace that contains both
-  // ::testing_internal and ::testing::internal2, i.e. the global
-  // namespace.  For more details, refer to the C++ Standard section
-  // 7.3.4-1 [namespace.udir].  This allows us to fall back onto
-  // testing::internal2::operator<< in case T doesn't come with a <<
-  // operator.
-  //
-  // We cannot write 'using ::testing::internal2::operator<<;', which
-  // gcc 3.3 fails to compile due to a compiler bug.
-  using namespace ::testing::internal2;  // NOLINT
-
-  // Assuming T is defined in namespace foo, in the next statement,
-  // the compiler will consider all of:
-  //
-  //   1. foo::operator<< (thanks to Koenig look-up),
-  //   2. ::operator<< (as the current namespace is enclosed in ::),
-  //   3. testing::internal2::operator<< (thanks to the using statement above).
-  //
-  // The operator<< whose type matches T best will be picked.
-  //
-  // We deliberately allow #2 to be a candidate, as sometimes it's
-  // impossible to define #1 (e.g. when foo is ::std, defining
-  // anything in it is undefined behavior unless you are a compiler
-  // vendor.).
-  *os << value;
-}
-
-}  // namespace testing_internal
-
-namespace testing {
-namespace internal {
-
-// FormatForComparison<ToPrint, OtherOperand>::Format(value) formats a
-// value of type ToPrint that is an operand of a comparison assertion
-// (e.g. ASSERT_EQ).  OtherOperand is the type of the other operand in
-// the comparison, and is used to help determine the best way to
-// format the value.  In particular, when the value is a C string
-// (char pointer) and the other operand is an STL string object, we
-// want to format the C string as a string, since we know it is
-// compared by value with the string object.  If the value is a char
-// pointer but the other operand is not an STL string object, we don't
-// know whether the pointer is supposed to point to a NUL-terminated
-// string, and thus want to print it as a pointer to be safe.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// The default case.
-template <typename ToPrint, typename OtherOperand>
-class FormatForComparison {
- public:
-  static ::std::string Format(const ToPrint& value) {
-    return ::testing::PrintToString(value);
-  }
-};
-
-// Array.
-template <typename ToPrint, size_t N, typename OtherOperand>
-class FormatForComparison<ToPrint[N], OtherOperand> {
- public:
-  static ::std::string Format(const ToPrint* value) {
-    return FormatForComparison<const ToPrint*, OtherOperand>::Format(value);
-  }
-};
-
-// By default, print C string as pointers to be safe, as we don't know
-// whether they actually point to a NUL-terminated string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(CharType)                \
-  template <typename OtherOperand>                                      \
-  class FormatForComparison<CharType*, OtherOperand> {                  \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(static_cast<const void*>(value)); \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const char);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(wchar_t);
-GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_(const wchar_t);
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_POINTER_
-
-// If a C string is compared with an STL string object, we know it's meant
-// to point to a NUL-terminated string, and thus can print it as a string.
-
-#define GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(CharType, OtherStringType) \
-  template <>                                                           \
-  class FormatForComparison<CharType*, OtherStringType> {               \
-   public:                                                              \
-    static ::std::string Format(CharType* value) {                      \
-      return ::testing::PrintToString(value);                           \
-    }                                                                   \
-  }
-
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(char, ::std::string);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const char, ::std::string);
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(wchar_t, ::std::wstring);
-GTEST_IMPL_FORMAT_C_STRING_AS_STRING_(const wchar_t, ::std::wstring);
-#endif
-
-#undef GTEST_IMPL_FORMAT_C_STRING_AS_STRING_
-
-// Formats a comparison assertion (e.g. ASSERT_EQ, EXPECT_LT, and etc)
-// operand to be used in a failure message.  The type (but not value)
-// of the other operand may affect the format.  This allows us to
-// print a char* as a raw pointer when it is compared against another
-// char* or void*, and print it as a C string when it is compared
-// against an std::string object, for example.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-template <typename T1, typename T2>
-std::string FormatForComparisonFailureMessage(
-    const T1& value, const T2& /* other_operand */) {
-  return FormatForComparison<T1, T2>::Format(value);
-}
-
-// UniversalPrinter<T>::Print(value, ostream_ptr) prints the given
-// value to the given ostream.  The caller must ensure that
-// 'ostream_ptr' is not NULL, or the behavior is undefined.
-//
-// We define UniversalPrinter as a class template (as opposed to a
-// function template), as we need to partially specialize it for
-// reference types, which cannot be done with function templates.
-template <typename T>
-class UniversalPrinter;
-
-template <typename T>
-void UniversalPrint(const T& value, ::std::ostream* os);
-
-enum DefaultPrinterType {
-  kPrintContainer,
-  kPrintPointer,
-  kPrintFunctionPointer,
-  kPrintOther,
-};
-template <DefaultPrinterType type> struct WrapPrinterType {};
-
-// Used to print an STL-style container when the user doesn't define
-// a PrintTo() for it.
-template <typename C>
-void DefaultPrintTo(WrapPrinterType<kPrintContainer> /* dummy */,
-                    const C& container, ::std::ostream* os) {
-  const size_t kMaxCount = 32;  // The maximum number of elements to print.
-  *os << '{';
-  size_t count = 0;
-  for (typename C::const_iterator it = container.begin();
-       it != container.end(); ++it, ++count) {
-    if (count > 0) {
-      *os << ',';
-      if (count == kMaxCount) {  // Enough has been printed.
-        *os << " ...";
-        break;
-      }
-    }
-    *os << ' ';
-    // We cannot call PrintTo(*it, os) here as PrintTo() doesn't
-    // handle *it being a native array.
-    internal::UniversalPrint(*it, os);
-  }
-
-  if (count > 0) {
-    *os << ' ';
-  }
-  *os << '}';
-}
-
-// Used to print a pointer that is neither a char pointer nor a member
-// pointer, when the user doesn't define PrintTo() for it.  (A member
-// variable pointer or member function pointer doesn't really point to
-// a location in the address space.  Their representation is
-// implementation-defined.  Therefore they will be printed as raw
-// bytes.)
-template <typename T>
-void DefaultPrintTo(WrapPrinterType<kPrintPointer> /* dummy */,
-                    T* p, ::std::ostream* os) {
-  if (p == nullptr) {
-    *os << "NULL";
-  } else {
-    // T is not a function type.  We just call << to print p,
-    // relying on ADL to pick up user-defined << for their pointer
-    // types, if any.
-    *os << p;
-  }
-}
-template <typename T>
-void DefaultPrintTo(WrapPrinterType<kPrintFunctionPointer> /* dummy */,
-                    T* p, ::std::ostream* os) {
-  if (p == nullptr) {
-    *os << "NULL";
-  } else {
-    // T is a function type, so '*os << p' doesn't do what we want
-    // (it just prints p as bool).  We want to print p as a const
-    // void*.
-    *os << reinterpret_cast<const void*>(p);
-  }
-}
-
-// Used to print a non-container, non-pointer value when the user
-// doesn't define PrintTo() for it.
-template <typename T>
-void DefaultPrintTo(WrapPrinterType<kPrintOther> /* dummy */,
-                    const T& value, ::std::ostream* os) {
-  ::testing_internal::DefaultPrintNonContainerTo(value, os);
-}
-
-// Prints the given value using the << operator if it has one;
-// otherwise prints the bytes in it.  This is what
-// UniversalPrinter<T>::Print() does when PrintTo() is not specialized
-// or overloaded for type T.
-//
-// A user can override this behavior for a class type Foo by defining
-// an overload of PrintTo() in the namespace where Foo is defined.  We
-// give the user this option as sometimes defining a << operator for
-// Foo is not desirable (e.g. the coding style may prevent doing it,
-// or there is already a << operator but it doesn't do what the user
-// wants).
-template <typename T>
-void PrintTo(const T& value, ::std::ostream* os) {
-  // DefaultPrintTo() is overloaded.  The type of its first argument
-  // determines which version will be picked.
-  //
-  // Note that we check for container types here, prior to we check
-  // for protocol message types in our operator<<.  The rationale is:
-  //
-  // For protocol messages, we want to give people a chance to
-  // override Google Mock's format by defining a PrintTo() or
-  // operator<<.  For STL containers, other formats can be
-  // incompatible with Google Mock's format for the container
-  // elements; therefore we check for container types here to ensure
-  // that our format is used.
-  //
-  // Note that MSVC and clang-cl do allow an implicit conversion from
-  // pointer-to-function to pointer-to-object, but clang-cl warns on it.
-  // So don't use ImplicitlyConvertible if it can be helped since it will
-  // cause this warning, and use a separate overload of DefaultPrintTo for
-  // function pointers so that the `*os << p` in the object pointer overload
-  // doesn't cause that warning either.
-  DefaultPrintTo(
-      WrapPrinterType <
-                  (sizeof(IsContainerTest<T>(0)) == sizeof(IsContainer)) &&
-              !IsRecursiveContainer<T>::value
-          ? kPrintContainer
-          : !std::is_pointer<T>::value
-                ? kPrintOther
-                : std::is_function<typename std::remove_pointer<T>::type>::value
-                      ? kPrintFunctionPointer
-                      : kPrintPointer > (),
-      value, os);
-}
-
-// The following list of PrintTo() overloads tells
-// UniversalPrinter<T>::Print() how to print standard types (built-in
-// types, strings, plain arrays, and pointers).
-
-// Overloads for various char types.
-GTEST_API_ void PrintTo(unsigned char c, ::std::ostream* os);
-GTEST_API_ void PrintTo(signed char c, ::std::ostream* os);
-inline void PrintTo(char c, ::std::ostream* os) {
-  // When printing a plain char, we always treat it as unsigned.  This
-  // way, the output won't be affected by whether the compiler thinks
-  // char is signed or not.
-  PrintTo(static_cast<unsigned char>(c), os);
-}
-
-// Overloads for other simple built-in types.
-inline void PrintTo(bool x, ::std::ostream* os) {
-  *os << (x ? "true" : "false");
-}
-
-// Overload for wchar_t type.
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its decimal code (except for L'\0').
-// The L'\0' char is printed as "L'\\0'". The decimal code is printed
-// as signed integer when wchar_t is implemented by the compiler
-// as a signed type and is printed as an unsigned integer when wchar_t
-// is implemented as an unsigned type.
-GTEST_API_ void PrintTo(wchar_t wc, ::std::ostream* os);
-
-// Overloads for C strings.
-GTEST_API_ void PrintTo(const char* s, ::std::ostream* os);
-inline void PrintTo(char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const char*>(s), os);
-}
-
-// signed/unsigned char is often used for representing binary data, so
-// we print pointers to it as void* to be safe.
-inline void PrintTo(const signed char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(signed char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(const unsigned char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-inline void PrintTo(unsigned char* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const void*>(s), os);
-}
-
-// MSVC can be configured to define wchar_t as a typedef of unsigned
-// short.  It defines _NATIVE_WCHAR_T_DEFINED when wchar_t is a native
-// type.  When wchar_t is a typedef, defining an overload for const
-// wchar_t* would cause unsigned short* be printed as a wide string,
-// possibly causing invalid memory accesses.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Overloads for wide C strings
-GTEST_API_ void PrintTo(const wchar_t* s, ::std::ostream* os);
-inline void PrintTo(wchar_t* s, ::std::ostream* os) {
-  PrintTo(ImplicitCast_<const wchar_t*>(s), os);
-}
-#endif
-
-// Overload for C arrays.  Multi-dimensional arrays are printed
-// properly.
-
-// Prints the given number of elements in an array, without printing
-// the curly braces.
-template <typename T>
-void PrintRawArrayTo(const T a[], size_t count, ::std::ostream* os) {
-  UniversalPrint(a[0], os);
-  for (size_t i = 1; i != count; i++) {
-    *os << ", ";
-    UniversalPrint(a[i], os);
-  }
-}
-
-// Overloads for ::std::string.
-GTEST_API_ void PrintStringTo(const ::std::string&s, ::std::ostream* os);
-inline void PrintTo(const ::std::string& s, ::std::ostream* os) {
-  PrintStringTo(s, os);
-}
-
-// Overloads for ::std::wstring.
-#if GTEST_HAS_STD_WSTRING
-GTEST_API_ void PrintWideStringTo(const ::std::wstring&s, ::std::ostream* os);
-inline void PrintTo(const ::std::wstring& s, ::std::ostream* os) {
-  PrintWideStringTo(s, os);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-#if GTEST_HAS_ABSL
-// Overload for absl::string_view.
-inline void PrintTo(absl::string_view sp, ::std::ostream* os) {
-  PrintTo(::std::string(sp), os);
-}
-#endif  // GTEST_HAS_ABSL
-
-inline void PrintTo(std::nullptr_t, ::std::ostream* os) { *os << "(nullptr)"; }
-
-template <typename T>
-void PrintTo(std::reference_wrapper<T> ref, ::std::ostream* os) {
-  UniversalPrinter<T&>::Print(ref.get(), os);
-}
-
-// Helper function for printing a tuple.  T must be instantiated with
-// a tuple type.
-template <typename T>
-void PrintTupleTo(const T&, std::integral_constant<size_t, 0>,
-                  ::std::ostream*) {}
-
-template <typename T, size_t I>
-void PrintTupleTo(const T& t, std::integral_constant<size_t, I>,
-                  ::std::ostream* os) {
-  PrintTupleTo(t, std::integral_constant<size_t, I - 1>(), os);
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (I > 1) {
-    GTEST_INTENTIONAL_CONST_COND_POP_()
-    *os << ", ";
-  }
-  UniversalPrinter<typename std::tuple_element<I - 1, T>::type>::Print(
-      std::get<I - 1>(t), os);
-}
-
-template <typename... Types>
-void PrintTo(const ::std::tuple<Types...>& t, ::std::ostream* os) {
-  *os << "(";
-  PrintTupleTo(t, std::integral_constant<size_t, sizeof...(Types)>(), os);
-  *os << ")";
-}
-
-// Overload for std::pair.
-template <typename T1, typename T2>
-void PrintTo(const ::std::pair<T1, T2>& value, ::std::ostream* os) {
-  *os << '(';
-  // We cannot use UniversalPrint(value.first, os) here, as T1 may be
-  // a reference type.  The same for printing value.second.
-  UniversalPrinter<T1>::Print(value.first, os);
-  *os << ", ";
-  UniversalPrinter<T2>::Print(value.second, os);
-  *os << ')';
-}
-
-// Implements printing a non-reference type T by letting the compiler
-// pick the right overload of PrintTo() for T.
-template <typename T>
-class UniversalPrinter {
- public:
-  // MSVC warns about adding const to a function type, so we want to
-  // disable the warning.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
-
-  // Note: we deliberately don't call this PrintTo(), as that name
-  // conflicts with ::testing::internal::PrintTo in the body of the
-  // function.
-  static void Print(const T& value, ::std::ostream* os) {
-    // By default, ::testing::internal::PrintTo() is used for printing
-    // the value.
-    //
-    // Thanks to Koenig look-up, if T is a class and has its own
-    // PrintTo() function defined in its namespace, that function will
-    // be visible here.  Since it is more specific than the generic ones
-    // in ::testing::internal, it will be picked by the compiler in the
-    // following statement - exactly what we want.
-    PrintTo(value, os);
-  }
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-};
-
-#if GTEST_HAS_ABSL
-
-// Printer for absl::optional
-
-template <typename T>
-class UniversalPrinter<::absl::optional<T>> {
- public:
-  static void Print(const ::absl::optional<T>& value, ::std::ostream* os) {
-    *os << '(';
-    if (!value) {
-      *os << "nullopt";
-    } else {
-      UniversalPrint(*value, os);
-    }
-    *os << ')';
-  }
-};
-
-// Printer for absl::variant
-
-template <typename... T>
-class UniversalPrinter<::absl::variant<T...>> {
- public:
-  static void Print(const ::absl::variant<T...>& value, ::std::ostream* os) {
-    *os << '(';
-    absl::visit(Visitor{os}, value);
-    *os << ')';
-  }
-
- private:
-  struct Visitor {
-    template <typename U>
-    void operator()(const U& u) const {
-      *os << "'" << GetTypeName<U>() << "' with value ";
-      UniversalPrint(u, os);
-    }
-    ::std::ostream* os;
-  };
-};
-
-#endif  // GTEST_HAS_ABSL
-
-// UniversalPrintArray(begin, len, os) prints an array of 'len'
-// elements, starting at address 'begin'.
-template <typename T>
-void UniversalPrintArray(const T* begin, size_t len, ::std::ostream* os) {
-  if (len == 0) {
-    *os << "{}";
-  } else {
-    *os << "{ ";
-    const size_t kThreshold = 18;
-    const size_t kChunkSize = 8;
-    // If the array has more than kThreshold elements, we'll have to
-    // omit some details by printing only the first and the last
-    // kChunkSize elements.
-    if (len <= kThreshold) {
-      PrintRawArrayTo(begin, len, os);
-    } else {
-      PrintRawArrayTo(begin, kChunkSize, os);
-      *os << ", ..., ";
-      PrintRawArrayTo(begin + len - kChunkSize, kChunkSize, os);
-    }
-    *os << " }";
-  }
-}
-// This overload prints a (const) char array compactly.
-GTEST_API_ void UniversalPrintArray(
-    const char* begin, size_t len, ::std::ostream* os);
-
-// This overload prints a (const) wchar_t array compactly.
-GTEST_API_ void UniversalPrintArray(
-    const wchar_t* begin, size_t len, ::std::ostream* os);
-
-// Implements printing an array type T[N].
-template <typename T, size_t N>
-class UniversalPrinter<T[N]> {
- public:
-  // Prints the given array, omitting some elements when there are too
-  // many.
-  static void Print(const T (&a)[N], ::std::ostream* os) {
-    UniversalPrintArray(a, N, os);
-  }
-};
-
-// Implements printing a reference type T&.
-template <typename T>
-class UniversalPrinter<T&> {
- public:
-  // MSVC warns about adding const to a function type, so we want to
-  // disable the warning.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4180)
-
-  static void Print(const T& value, ::std::ostream* os) {
-    // Prints the address of the value.  We use reinterpret_cast here
-    // as static_cast doesn't compile when T is a function type.
-    *os << "@" << reinterpret_cast<const void*>(&value) << " ";
-
-    // Then prints the value itself.
-    UniversalPrint(value, os);
-  }
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-};
-
-// Prints a value tersely: for a reference type, the referenced value
-// (but not the address) is printed; for a (const) char pointer, the
-// NUL-terminated string (but not the pointer) is printed.
-
-template <typename T>
-class UniversalTersePrinter {
- public:
-  static void Print(const T& value, ::std::ostream* os) {
-    UniversalPrint(value, os);
-  }
-};
-template <typename T>
-class UniversalTersePrinter<T&> {
- public:
-  static void Print(const T& value, ::std::ostream* os) {
-    UniversalPrint(value, os);
-  }
-};
-template <typename T, size_t N>
-class UniversalTersePrinter<T[N]> {
- public:
-  static void Print(const T (&value)[N], ::std::ostream* os) {
-    UniversalPrinter<T[N]>::Print(value, os);
-  }
-};
-template <>
-class UniversalTersePrinter<const char*> {
- public:
-  static void Print(const char* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(std::string(str), os);
-    }
-  }
-};
-template <>
-class UniversalTersePrinter<char*> {
- public:
-  static void Print(char* str, ::std::ostream* os) {
-    UniversalTersePrinter<const char*>::Print(str, os);
-  }
-};
-
-#if GTEST_HAS_STD_WSTRING
-template <>
-class UniversalTersePrinter<const wchar_t*> {
- public:
-  static void Print(const wchar_t* str, ::std::ostream* os) {
-    if (str == nullptr) {
-      *os << "NULL";
-    } else {
-      UniversalPrint(::std::wstring(str), os);
-    }
-  }
-};
-#endif
-
-template <>
-class UniversalTersePrinter<wchar_t*> {
- public:
-  static void Print(wchar_t* str, ::std::ostream* os) {
-    UniversalTersePrinter<const wchar_t*>::Print(str, os);
-  }
-};
-
-template <typename T>
-void UniversalTersePrint(const T& value, ::std::ostream* os) {
-  UniversalTersePrinter<T>::Print(value, os);
-}
-
-// Prints a value using the type inferred by the compiler.  The
-// difference between this and UniversalTersePrint() is that for a
-// (const) char pointer, this prints both the pointer and the
-// NUL-terminated string.
-template <typename T>
-void UniversalPrint(const T& value, ::std::ostream* os) {
-  // A workarond for the bug in VC++ 7.1 that prevents us from instantiating
-  // UniversalPrinter with T directly.
-  typedef T T1;
-  UniversalPrinter<T1>::Print(value, os);
-}
-
-typedef ::std::vector< ::std::string> Strings;
-
-  // Tersely prints the first N fields of a tuple to a string vector,
-  // one element for each field.
-template <typename Tuple>
-void TersePrintPrefixToStrings(const Tuple&, std::integral_constant<size_t, 0>,
-                               Strings*) {}
-template <typename Tuple, size_t I>
-void TersePrintPrefixToStrings(const Tuple& t,
-                               std::integral_constant<size_t, I>,
-                               Strings* strings) {
-  TersePrintPrefixToStrings(t, std::integral_constant<size_t, I - 1>(),
-                            strings);
-  ::std::stringstream ss;
-  UniversalTersePrint(std::get<I - 1>(t), &ss);
-  strings->push_back(ss.str());
-}
-
-// Prints the fields of a tuple tersely to a string vector, one
-// element for each field.  See the comment before
-// UniversalTersePrint() for how we define "tersely".
-template <typename Tuple>
-Strings UniversalTersePrintTupleFieldsToStrings(const Tuple& value) {
-  Strings result;
-  TersePrintPrefixToStrings(
-      value, std::integral_constant<size_t, std::tuple_size<Tuple>::value>(),
-      &result);
-  return result;
-}
-
-}  // namespace internal
-
-#if GTEST_HAS_ABSL
-namespace internal2 {
-template <typename T>
-void TypeWithoutFormatter<T, kConvertibleToStringView>::PrintValue(
-    const T& value, ::std::ostream* os) {
-  internal::PrintTo(absl::string_view(value), os);
-}
-}  // namespace internal2
-#endif
-
-template <typename T>
-::std::string PrintToString(const T& value) {
-  ::std::stringstream ss;
-  internal::UniversalTersePrinter<T>::Print(value, &ss);
-  return ss.str();
-}
-
-}  // namespace testing
-
-// Include any custom printer added by the local installation.
-// We must include this header at the end to make sure it can use the
-// declarations from this file.
-#include "gtest/internal/custom/gtest-printers.h"
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PRINTERS_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-spi.h b/3rdparty/gtest/include/gtest/gtest-spi.h
deleted file mode 100644
index aa38870e..00000000
--- a/3rdparty/gtest/include/gtest/gtest-spi.h
+++ /dev/null
@@ -1,238 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Utilities for testing Google Test itself and code that uses Google Test
-// (e.g. frameworks built on top of Google Test).
-
-// GOOGLETEST_CM0004 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_SPI_H_
-#define GTEST_INCLUDE_GTEST_GTEST_SPI_H_
-
-#include "gtest/gtest.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// This helper class can be used to mock out Google Test failure reporting
-// so that we can test Google Test or code that builds on Google Test.
-//
-// An object of this class appends a TestPartResult object to the
-// TestPartResultArray object given in the constructor whenever a Google Test
-// failure is reported. It can either intercept only failures that are
-// generated in the same thread that created this object or it can intercept
-// all generated failures. The scope of this mock object can be controlled with
-// the second argument to the two arguments constructor.
-class GTEST_API_ ScopedFakeTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  // The two possible mocking modes of this object.
-  enum InterceptMode {
-    INTERCEPT_ONLY_CURRENT_THREAD,  // Intercepts only thread local failures.
-    INTERCEPT_ALL_THREADS           // Intercepts all failures.
-  };
-
-  // The c'tor sets this object as the test part result reporter used
-  // by Google Test.  The 'result' parameter specifies where to report the
-  // results. This reporter will only catch failures generated in the current
-  // thread. DEPRECATED
-  explicit ScopedFakeTestPartResultReporter(TestPartResultArray* result);
-
-  // Same as above, but you can choose the interception scope of this object.
-  ScopedFakeTestPartResultReporter(InterceptMode intercept_mode,
-                                   TestPartResultArray* result);
-
-  // The d'tor restores the previous test part result reporter.
-  ~ScopedFakeTestPartResultReporter() override;
-
-  // Appends the TestPartResult object to the TestPartResultArray
-  // received in the constructor.
-  //
-  // This method is from the TestPartResultReporterInterface
-  // interface.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  void Init();
-
-  const InterceptMode intercept_mode_;
-  TestPartResultReporterInterface* old_reporter_;
-  TestPartResultArray* const result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedFakeTestPartResultReporter);
-};
-
-namespace internal {
-
-// A helper class for implementing EXPECT_FATAL_FAILURE() and
-// EXPECT_NONFATAL_FAILURE().  Its destructor verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-class GTEST_API_ SingleFailureChecker {
- public:
-  // The constructor remembers the arguments.
-  SingleFailureChecker(const TestPartResultArray* results,
-                       TestPartResult::Type type, const std::string& substr);
-  ~SingleFailureChecker();
- private:
-  const TestPartResultArray* const results_;
-  const TestPartResult::Type type_;
-  const std::string substr_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SingleFailureChecker);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// A set of macros for testing Google Test assertions or code that's expected
-// to generate Google Test fatal failures.  It verifies that the given
-// statement will cause exactly one fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_FATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_FATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - 'statement' cannot reference local non-static variables or
-//     non-static members of the current object.
-//   - 'statement' cannot return a value.
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  The AcceptsMacroThatExpandsToUnprotectedComma test in
-// gtest_unittest.cc will fail to compile if we do that.
-#define EXPECT_FATAL_FAILURE(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_FATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do { \
-    class GTestExpectFatalFailureHelper {\
-     public:\
-      static void Execute() { statement; }\
-    };\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kFatalFailure, (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ALL_THREADS, &gtest_failures);\
-      GTestExpectFatalFailureHelper::Execute();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-// A macro for testing Google Test assertions or code that's expected to
-// generate Google Test non-fatal failures.  It asserts that the given
-// statement will cause exactly one non-fatal Google Test failure with 'substr'
-// being part of the failure message.
-//
-// There are two different versions of this macro. EXPECT_NONFATAL_FAILURE only
-// affects and considers failures generated in the current thread and
-// EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS does the same but for all threads.
-//
-// 'statement' is allowed to reference local variables and members of
-// the current object.
-//
-// The verification of the assertion is done correctly even when the statement
-// throws an exception or aborts the current function.
-//
-// Known restrictions:
-//   - You cannot stream a failure message to this macro.
-//
-// Note that even though the implementations of the following two
-// macros are much alike, we cannot refactor them to use a common
-// helper macro, due to some peculiarity in how the preprocessor
-// works.  If we do that, the code won't compile when the user gives
-// EXPECT_NONFATAL_FAILURE() a statement that contains a macro that
-// expands to code containing an unprotected comma.  The
-// AcceptsMacroThatExpandsToUnprotectedComma test in gtest_unittest.cc
-// catches that.
-//
-// For the same reason, we have to write
-//   if (::testing::internal::AlwaysTrue()) { statement; }
-// instead of
-//   GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-// to avoid an MSVC warning on unreachable code.
-#define EXPECT_NONFATAL_FAILURE(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter:: \
-          INTERCEPT_ONLY_CURRENT_THREAD, &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#define EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(statement, substr) \
-  do {\
-    ::testing::TestPartResultArray gtest_failures;\
-    ::testing::internal::SingleFailureChecker gtest_checker(\
-        &gtest_failures, ::testing::TestPartResult::kNonFatalFailure, \
-        (substr));\
-    {\
-      ::testing::ScopedFakeTestPartResultReporter gtest_reporter(\
-          ::testing::ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, \
-          &gtest_failures);\
-      if (::testing::internal::AlwaysTrue()) { statement; }\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_SPI_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-test-part.h b/3rdparty/gtest/include/gtest/gtest-test-part.h
deleted file mode 100644
index 05a79853..00000000
--- a/3rdparty/gtest/include/gtest/gtest-test-part.h
+++ /dev/null
@@ -1,184 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-#define GTEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
-
-#include <iosfwd>
-#include <vector>
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// A copyable object representing the result of a test part (i.e. an
-// assertion or an explicit FAIL(), ADD_FAILURE(), or SUCCESS()).
-//
-// Don't inherit from TestPartResult as its destructor is not virtual.
-class GTEST_API_ TestPartResult {
- public:
-  // The possible outcomes of a test part (i.e. an assertion or an
-  // explicit SUCCEED(), FAIL(), or ADD_FAILURE()).
-  enum Type {
-    kSuccess,          // Succeeded.
-    kNonFatalFailure,  // Failed but the test can continue.
-    kFatalFailure,     // Failed and the test should be terminated.
-    kSkip              // Skipped.
-  };
-
-  // C'tor.  TestPartResult does NOT have a default constructor.
-  // Always use this constructor (with parameters) to create a
-  // TestPartResult object.
-  TestPartResult(Type a_type, const char* a_file_name, int a_line_number,
-                 const char* a_message)
-      : type_(a_type),
-        file_name_(a_file_name == nullptr ? "" : a_file_name),
-        line_number_(a_line_number),
-        summary_(ExtractSummary(a_message)),
-        message_(a_message) {}
-
-  // Gets the outcome of the test part.
-  Type type() const { return type_; }
-
-  // Gets the name of the source file where the test part took place, or
-  // NULL if it's unknown.
-  const char* file_name() const {
-    return file_name_.empty() ? nullptr : file_name_.c_str();
-  }
-
-  // Gets the line in the source file where the test part took place,
-  // or -1 if it's unknown.
-  int line_number() const { return line_number_; }
-
-  // Gets the summary of the failure message.
-  const char* summary() const { return summary_.c_str(); }
-
-  // Gets the message associated with the test part.
-  const char* message() const { return message_.c_str(); }
-
-  // Returns true if and only if the test part was skipped.
-  bool skipped() const { return type_ == kSkip; }
-
-  // Returns true if and only if the test part passed.
-  bool passed() const { return type_ == kSuccess; }
-
-  // Returns true if and only if the test part non-fatally failed.
-  bool nonfatally_failed() const { return type_ == kNonFatalFailure; }
-
-  // Returns true if and only if the test part fatally failed.
-  bool fatally_failed() const { return type_ == kFatalFailure; }
-
-  // Returns true if and only if the test part failed.
-  bool failed() const { return fatally_failed() || nonfatally_failed(); }
-
- private:
-  Type type_;
-
-  // Gets the summary of the failure message by omitting the stack
-  // trace in it.
-  static std::string ExtractSummary(const char* message);
-
-  // The name of the source file where the test part took place, or
-  // "" if the source file is unknown.
-  std::string file_name_;
-  // The line in the source file where the test part took place, or -1
-  // if the line number is unknown.
-  int line_number_;
-  std::string summary_;  // The test failure summary.
-  std::string message_;  // The test failure message.
-};
-
-// Prints a TestPartResult object.
-std::ostream& operator<<(std::ostream& os, const TestPartResult& result);
-
-// An array of TestPartResult objects.
-//
-// Don't inherit from TestPartResultArray as its destructor is not
-// virtual.
-class GTEST_API_ TestPartResultArray {
- public:
-  TestPartResultArray() {}
-
-  // Appends the given TestPartResult to the array.
-  void Append(const TestPartResult& result);
-
-  // Returns the TestPartResult at the given index (0-based).
-  const TestPartResult& GetTestPartResult(int index) const;
-
-  // Returns the number of TestPartResult objects in the array.
-  int size() const;
-
- private:
-  std::vector<TestPartResult> array_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestPartResultArray);
-};
-
-// This interface knows how to report a test part result.
-class GTEST_API_ TestPartResultReporterInterface {
- public:
-  virtual ~TestPartResultReporterInterface() {}
-
-  virtual void ReportTestPartResult(const TestPartResult& result) = 0;
-};
-
-namespace internal {
-
-// This helper class is used by {ASSERT|EXPECT}_NO_FATAL_FAILURE to check if a
-// statement generates new fatal failures. To do so it registers itself as the
-// current test part result reporter. Besides checking if fatal failures were
-// reported, it only delegates the reporting to the former result reporter.
-// The original result reporter is restored in the destructor.
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-class GTEST_API_ HasNewFatalFailureHelper
-    : public TestPartResultReporterInterface {
- public:
-  HasNewFatalFailureHelper();
-  ~HasNewFatalFailureHelper() override;
-  void ReportTestPartResult(const TestPartResult& result) override;
-  bool has_new_fatal_failure() const { return has_new_fatal_failure_; }
- private:
-  bool has_new_fatal_failure_;
-  TestPartResultReporterInterface* original_reporter_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(HasNewFatalFailureHelper);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_TEST_PART_H_
diff --git a/3rdparty/gtest/include/gtest/gtest-typed-test.h b/3rdparty/gtest/include/gtest/gtest-typed-test.h
deleted file mode 100644
index 095ce058..00000000
--- a/3rdparty/gtest/include/gtest/gtest-typed-test.h
+++ /dev/null
@@ -1,330 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-#define GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
-
-// This header implements typed tests and type-parameterized tests.
-
-// Typed (aka type-driven) tests repeat the same test for types in a
-// list.  You must know which types you want to test with when writing
-// typed tests. Here's how you do it:
-
-#if 0
-
-// First, define a fixture class template.  It should be parameterized
-// by a type.  Remember to derive it from testing::Test.
-template <typename T>
-class FooTest : public testing::Test {
- public:
-  ...
-  typedef std::list<T> List;
-  static T shared_;
-  T value_;
-};
-
-// Next, associate a list of types with the test suite, which will be
-// repeated for each type in the list.  The typedef is necessary for
-// the macro to parse correctly.
-typedef testing::Types<char, int, unsigned int> MyTypes;
-TYPED_TEST_SUITE(FooTest, MyTypes);
-
-// If the type list contains only one type, you can write that type
-// directly without Types<...>:
-//   TYPED_TEST_SUITE(FooTest, int);
-
-// Then, use TYPED_TEST() instead of TEST_F() to define as many typed
-// tests for this test suite as you want.
-TYPED_TEST(FooTest, DoesBlah) {
-  // Inside a test, refer to the special name TypeParam to get the type
-  // parameter.  Since we are inside a derived class template, C++ requires
-  // us to visit the members of FooTest via 'this'.
-  TypeParam n = this->value_;
-
-  // To visit static members of the fixture, add the TestFixture::
-  // prefix.
-  n += TestFixture::shared_;
-
-  // To refer to typedefs in the fixture, add the "typename
-  // TestFixture::" prefix.
-  typename TestFixture::List values;
-  values.push_back(n);
-  ...
-}
-
-TYPED_TEST(FooTest, HasPropertyA) { ... }
-
-// TYPED_TEST_SUITE takes an optional third argument which allows to specify a
-// class that generates custom test name suffixes based on the type. This should
-// be a class which has a static template function GetName(int index) returning
-// a string for each type. The provided integer index equals the index of the
-// type in the provided type list. In many cases the index can be ignored.
-//
-// For example:
-//   class MyTypeNames {
-//    public:
-//     template <typename T>
-//     static std::string GetName(int) {
-//       if (std::is_same<T, char>()) return "char";
-//       if (std::is_same<T, int>()) return "int";
-//       if (std::is_same<T, unsigned int>()) return "unsignedInt";
-//     }
-//   };
-//   TYPED_TEST_SUITE(FooTest, MyTypes, MyTypeNames);
-
-#endif  // 0
-
-// Type-parameterized tests are abstract test patterns parameterized
-// by a type.  Compared with typed tests, type-parameterized tests
-// allow you to define the test pattern without knowing what the type
-// parameters are.  The defined pattern can be instantiated with
-// different types any number of times, in any number of translation
-// units.
-//
-// If you are designing an interface or concept, you can define a
-// suite of type-parameterized tests to verify properties that any
-// valid implementation of the interface/concept should have.  Then,
-// each implementation can easily instantiate the test suite to verify
-// that it conforms to the requirements, without having to write
-// similar tests repeatedly.  Here's an example:
-
-#if 0
-
-// First, define a fixture class template.  It should be parameterized
-// by a type.  Remember to derive it from testing::Test.
-template <typename T>
-class FooTest : public testing::Test {
-  ...
-};
-
-// Next, declare that you will define a type-parameterized test suite
-// (the _P suffix is for "parameterized" or "pattern", whichever you
-// prefer):
-TYPED_TEST_SUITE_P(FooTest);
-
-// Then, use TYPED_TEST_P() to define as many type-parameterized tests
-// for this type-parameterized test suite as you want.
-TYPED_TEST_P(FooTest, DoesBlah) {
-  // Inside a test, refer to TypeParam to get the type parameter.
-  TypeParam n = 0;
-  ...
-}
-
-TYPED_TEST_P(FooTest, HasPropertyA) { ... }
-
-// Now the tricky part: you need to register all test patterns before
-// you can instantiate them.  The first argument of the macro is the
-// test suite name; the rest are the names of the tests in this test
-// case.
-REGISTER_TYPED_TEST_SUITE_P(FooTest,
-                            DoesBlah, HasPropertyA);
-
-// Finally, you are free to instantiate the pattern with the types you
-// want.  If you put the above code in a header file, you can #include
-// it in multiple C++ source files and instantiate it multiple times.
-//
-// To distinguish different instances of the pattern, the first
-// argument to the INSTANTIATE_* macro is a prefix that will be added
-// to the actual test suite name.  Remember to pick unique prefixes for
-// different instances.
-typedef testing::Types<char, int, unsigned int> MyTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes);
-
-// If the type list contains only one type, you can write that type
-// directly without Types<...>:
-//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, int);
-//
-// Similar to the optional argument of TYPED_TEST_SUITE above,
-// INSTANTIATE_TEST_SUITE_P takes an optional fourth argument which allows to
-// generate custom names.
-//   INSTANTIATE_TYPED_TEST_SUITE_P(My, FooTest, MyTypes, MyTypeNames);
-
-#endif  // 0
-
-#include "gtest/internal/gtest-port.h"
-#include "gtest/internal/gtest-type-util.h"
-
-// Implements typed tests.
-
-#if GTEST_HAS_TYPED_TEST
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the name of the typedef for the type parameters of the
-// given test suite.
-#define GTEST_TYPE_PARAMS_(TestSuiteName) gtest_type_params_##TestSuiteName##_
-
-// Expands to the name of the typedef for the NameGenerator, responsible for
-// creating the suffixes of the name.
-#define GTEST_NAME_GENERATOR_(TestSuiteName) \
-  gtest_type_params_##TestSuiteName##_NameGenerator
-
-#define TYPED_TEST_SUITE(CaseName, Types, ...)                           \
-  typedef ::testing::internal::TypeList<Types>::type GTEST_TYPE_PARAMS_( \
-      CaseName);                                                         \
-  typedef ::testing::internal::NameGeneratorSelector<__VA_ARGS__>::type  \
-      GTEST_NAME_GENERATOR_(CaseName)
-
-# define TYPED_TEST(CaseName, TestName)                                       \
-  template <typename gtest_TypeParam_>                                        \
-  class GTEST_TEST_CLASS_NAME_(CaseName, TestName)                            \
-      : public CaseName<gtest_TypeParam_> {                                   \
-   private:                                                                   \
-    typedef CaseName<gtest_TypeParam_> TestFixture;                           \
-    typedef gtest_TypeParam_ TypeParam;                                       \
-    virtual void TestBody();                                                  \
-  };                                                                          \
-  static bool gtest_##CaseName##_##TestName##_registered_                     \
-        GTEST_ATTRIBUTE_UNUSED_ =                                             \
-      ::testing::internal::TypeParameterizedTest<                             \
-          CaseName,                                                           \
-          ::testing::internal::TemplateSel<GTEST_TEST_CLASS_NAME_(CaseName,   \
-                                                                  TestName)>, \
-          GTEST_TYPE_PARAMS_(                                                 \
-              CaseName)>::Register("",                                        \
-                                   ::testing::internal::CodeLocation(         \
-                                       __FILE__, __LINE__),                   \
-                                   #CaseName, #TestName, 0,                   \
-                                   ::testing::internal::GenerateNames<        \
-                                       GTEST_NAME_GENERATOR_(CaseName),       \
-                                       GTEST_TYPE_PARAMS_(CaseName)>());      \
-  template <typename gtest_TypeParam_>                                        \
-  void GTEST_TEST_CLASS_NAME_(CaseName,                                       \
-                              TestName)<gtest_TypeParam_>::TestBody()
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define TYPED_TEST_CASE                                                \
-  static_assert(::testing::internal::TypedTestCaseIsDeprecated(), ""); \
-  TYPED_TEST_SUITE
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-// Implements type-parameterized tests.
-
-#if GTEST_HAS_TYPED_TEST_P
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the namespace name that the type-parameterized tests for
-// the given type-parameterized test suite are defined in.  The exact
-// name of the namespace is subject to change without notice.
-#define GTEST_SUITE_NAMESPACE_(TestSuiteName) gtest_suite_##TestSuiteName##_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Expands to the name of the variable used to remember the names of
-// the defined tests in the given test suite.
-#define GTEST_TYPED_TEST_SUITE_P_STATE_(TestSuiteName) \
-  gtest_typed_test_suite_p_state_##TestSuiteName##_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE DIRECTLY.
-//
-// Expands to the name of the variable used to remember the names of
-// the registered tests in the given test suite.
-#define GTEST_REGISTERED_TEST_NAMES_(TestSuiteName) \
-  gtest_registered_test_names_##TestSuiteName##_
-
-// The variables defined in the type-parameterized test macros are
-// static as typically these macros are used in a .h file that can be
-// #included in multiple translation units linked together.
-#define TYPED_TEST_SUITE_P(SuiteName)              \
-  static ::testing::internal::TypedTestSuitePState \
-      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define TYPED_TEST_CASE_P                                                 \
-  static_assert(::testing::internal::TypedTestCase_P_IsDeprecated(), ""); \
-  TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#define TYPED_TEST_P(SuiteName, TestName)                             \
-  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                       \
-    template <typename gtest_TypeParam_>                              \
-    class TestName : public SuiteName<gtest_TypeParam_> {             \
-     private:                                                         \
-      typedef SuiteName<gtest_TypeParam_> TestFixture;                \
-      typedef gtest_TypeParam_ TypeParam;                             \
-      virtual void TestBody();                                        \
-    };                                                                \
-    static bool gtest_##TestName##_defined_ GTEST_ATTRIBUTE_UNUSED_ = \
-        GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).AddTestName(       \
-            __FILE__, __LINE__, #SuiteName, #TestName);               \
-  }                                                                   \
-  template <typename gtest_TypeParam_>                                \
-  void GTEST_SUITE_NAMESPACE_(                                        \
-      SuiteName)::TestName<gtest_TypeParam_>::TestBody()
-
-#define REGISTER_TYPED_TEST_SUITE_P(SuiteName, ...)                            \
-  namespace GTEST_SUITE_NAMESPACE_(SuiteName) {                                \
-    typedef ::testing::internal::Templates<__VA_ARGS__>::type gtest_AllTests_; \
-  }                                                                            \
-  static const char* const GTEST_REGISTERED_TEST_NAMES_(                       \
-      SuiteName) GTEST_ATTRIBUTE_UNUSED_ =                                     \
-      GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName).VerifyRegisteredTestNames(    \
-          __FILE__, __LINE__, #__VA_ARGS__)
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define REGISTER_TYPED_TEST_CASE_P                                           \
-  static_assert(::testing::internal::RegisterTypedTestCase_P_IsDeprecated(), \
-                "");                                                         \
-  REGISTER_TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#define INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, SuiteName, Types, ...)       \
-  static bool gtest_##Prefix##_##SuiteName GTEST_ATTRIBUTE_UNUSED_ =        \
-      ::testing::internal::TypeParameterizedTestSuite<                      \
-          SuiteName, GTEST_SUITE_NAMESPACE_(SuiteName)::gtest_AllTests_,    \
-          ::testing::internal::TypeList<Types>::type>::                     \
-          Register(#Prefix,                                                 \
-                   ::testing::internal::CodeLocation(__FILE__, __LINE__),   \
-                   &GTEST_TYPED_TEST_SUITE_P_STATE_(SuiteName), #SuiteName, \
-                   GTEST_REGISTERED_TEST_NAMES_(SuiteName),                 \
-                   ::testing::internal::GenerateNames<                      \
-                       ::testing::internal::NameGeneratorSelector<          \
-                           __VA_ARGS__>::type,                              \
-                       ::testing::internal::TypeList<Types>::type>())
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-#define INSTANTIATE_TYPED_TEST_CASE_P                                      \
-  static_assert(                                                           \
-      ::testing::internal::InstantiateTypedTestCase_P_IsDeprecated(), ""); \
-  INSTANTIATE_TYPED_TEST_SUITE_P
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_TYPED_TEST_H_
diff --git a/3rdparty/gtest/include/gtest/gtest.h b/3rdparty/gtest/include/gtest/gtest.h
deleted file mode 100644
index dbe5b1c2..00000000
--- a/3rdparty/gtest/include/gtest/gtest.h
+++ /dev/null
@@ -1,2478 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the public API for Google Test.  It should be
-// included by any test program that uses Google Test.
-//
-// IMPORTANT NOTE: Due to limitation of the C++ language, we have to
-// leave some internal implementation details in this header file.
-// They are clearly marked by comments like this:
-//
-//   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-//
-// Such code is NOT meant to be used by a user directly, and is subject
-// to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
-// program!
-//
-// Acknowledgment: Google Test borrowed the idea of automatic test
-// registration from Barthelemy Dagenais' (barthelemy@prologique.com)
-// easyUnit framework.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_H_
-#define GTEST_INCLUDE_GTEST_GTEST_H_
-
-#include <cstddef>
-#include <limits>
-#include <memory>
-#include <ostream>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-#include "gtest/gtest-death-test.h"
-#include "gtest/gtest-matchers.h"
-#include "gtest/gtest-message.h"
-#include "gtest/gtest-param-test.h"
-#include "gtest/gtest-printers.h"
-#include "gtest/gtest_prod.h"
-#include "gtest/gtest-test-part.h"
-#include "gtest/gtest-typed-test.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// Silence C4100 (unreferenced formal parameter) and 4805
-// unsafe mix of type 'const int' and type 'const bool'
-#ifdef _MSC_VER
-# pragma warning(push)
-# pragma warning(disable:4805)
-# pragma warning(disable:4100)
-#endif
-
-
-// Declares the flags.
-
-// This flag temporary enables the disabled tests.
-GTEST_DECLARE_bool_(also_run_disabled_tests);
-
-// This flag brings the debugger on an assertion failure.
-GTEST_DECLARE_bool_(break_on_failure);
-
-// This flag controls whether Google Test catches all test-thrown exceptions
-// and logs them as failures.
-GTEST_DECLARE_bool_(catch_exceptions);
-
-// This flag enables using colors in terminal output. Available values are
-// "yes" to enable colors, "no" (disable colors), or "auto" (the default)
-// to let Google Test decide.
-GTEST_DECLARE_string_(color);
-
-// This flag sets up the filter to select by name using a glob pattern
-// the tests to run. If the filter is not given all tests are executed.
-GTEST_DECLARE_string_(filter);
-
-// This flag controls whether Google Test installs a signal handler that dumps
-// debugging information when fatal signals are raised.
-GTEST_DECLARE_bool_(install_failure_signal_handler);
-
-// This flag causes the Google Test to list tests. None of the tests listed
-// are actually run if the flag is provided.
-GTEST_DECLARE_bool_(list_tests);
-
-// This flag controls whether Google Test emits a detailed XML report to a file
-// in addition to its normal textual output.
-GTEST_DECLARE_string_(output);
-
-// This flags control whether Google Test prints the elapsed time for each
-// test.
-GTEST_DECLARE_bool_(print_time);
-
-// This flags control whether Google Test prints UTF8 characters as text.
-GTEST_DECLARE_bool_(print_utf8);
-
-// This flag specifies the random number seed.
-GTEST_DECLARE_int32_(random_seed);
-
-// This flag sets how many times the tests are repeated. The default value
-// is 1. If the value is -1 the tests are repeating forever.
-GTEST_DECLARE_int32_(repeat);
-
-// This flag controls whether Google Test includes Google Test internal
-// stack frames in failure stack traces.
-GTEST_DECLARE_bool_(show_internal_stack_frames);
-
-// When this flag is specified, tests' order is randomized on every iteration.
-GTEST_DECLARE_bool_(shuffle);
-
-// This flag specifies the maximum number of stack frames to be
-// printed in a failure message.
-GTEST_DECLARE_int32_(stack_trace_depth);
-
-// When this flag is specified, a failed assertion will throw an
-// exception if exceptions are enabled, or exit the program with a
-// non-zero code otherwise. For use with an external test framework.
-GTEST_DECLARE_bool_(throw_on_failure);
-
-// When this flag is set with a "host:port" string, on supported
-// platforms test results are streamed to the specified port on
-// the specified host machine.
-GTEST_DECLARE_string_(stream_result_to);
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-GTEST_DECLARE_string_(flagfile);
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// The upper limit for valid stack trace depths.
-const int kMaxStackTraceDepth = 100;
-
-namespace internal {
-
-class AssertHelper;
-class DefaultGlobalTestPartResultReporter;
-class ExecDeathTest;
-class NoExecDeathTest;
-class FinalSuccessChecker;
-class GTestFlagSaver;
-class StreamingListenerTest;
-class TestResultAccessor;
-class TestEventListenersAccessor;
-class TestEventRepeater;
-class UnitTestRecordPropertyTestHelper;
-class WindowsDeathTest;
-class FuchsiaDeathTest;
-class UnitTestImpl* GetUnitTestImpl();
-void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
-                                    const std::string& message);
-
-}  // namespace internal
-
-// The friend relationship of some of these classes is cyclic.
-// If we don't forward declare them the compiler might confuse the classes
-// in friendship clauses with same named classes on the scope.
-class Test;
-class TestSuite;
-
-// Old API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-using TestCase = TestSuite;
-#endif
-class TestInfo;
-class UnitTest;
-
-// A class for indicating whether an assertion was successful.  When
-// the assertion wasn't successful, the AssertionResult object
-// remembers a non-empty message that describes how it failed.
-//
-// To create an instance of this class, use one of the factory functions
-// (AssertionSuccess() and AssertionFailure()).
-//
-// This class is useful for two purposes:
-//   1. Defining predicate functions to be used with Boolean test assertions
-//      EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
-//   2. Defining predicate-format functions to be
-//      used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
-//
-// For example, if you define IsEven predicate:
-//
-//   testing::AssertionResult IsEven(int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess();
-//     else
-//       return testing::AssertionFailure() << n << " is odd";
-//   }
-//
-// Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
-// will print the message
-//
-//   Value of: IsEven(Fib(5))
-//     Actual: false (5 is odd)
-//   Expected: true
-//
-// instead of a more opaque
-//
-//   Value of: IsEven(Fib(5))
-//     Actual: false
-//   Expected: true
-//
-// in case IsEven is a simple Boolean predicate.
-//
-// If you expect your predicate to be reused and want to support informative
-// messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
-// about half as often as positive ones in our tests), supply messages for
-// both success and failure cases:
-//
-//   testing::AssertionResult IsEven(int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess() << n << " is even";
-//     else
-//       return testing::AssertionFailure() << n << " is odd";
-//   }
-//
-// Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
-//
-//   Value of: IsEven(Fib(6))
-//     Actual: true (8 is even)
-//   Expected: false
-//
-// NB: Predicates that support negative Boolean assertions have reduced
-// performance in positive ones so be careful not to use them in tests
-// that have lots (tens of thousands) of positive Boolean assertions.
-//
-// To use this class with EXPECT_PRED_FORMAT assertions such as:
-//
-//   // Verifies that Foo() returns an even number.
-//   EXPECT_PRED_FORMAT1(IsEven, Foo());
-//
-// you need to define:
-//
-//   testing::AssertionResult IsEven(const char* expr, int n) {
-//     if ((n % 2) == 0)
-//       return testing::AssertionSuccess();
-//     else
-//       return testing::AssertionFailure()
-//         << "Expected: " << expr << " is even\n  Actual: it's " << n;
-//   }
-//
-// If Foo() returns 5, you will see the following message:
-//
-//   Expected: Foo() is even
-//     Actual: it's 5
-//
-class GTEST_API_ AssertionResult {
- public:
-  // Copy constructor.
-  // Used in EXPECT_TRUE/FALSE(assertion_result).
-  AssertionResult(const AssertionResult& other);
-
-#if defined(_MSC_VER) && _MSC_VER < 1910
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 /* forcing value to bool */)
-#endif
-
-  // Used in the EXPECT_TRUE/FALSE(bool_expression).
-  //
-  // T must be contextually convertible to bool.
-  //
-  // The second parameter prevents this overload from being considered if
-  // the argument is implicitly convertible to AssertionResult. In that case
-  // we want AssertionResult's copy constructor to be used.
-  template <typename T>
-  explicit AssertionResult(
-      const T& success,
-      typename std::enable_if<
-          !std::is_convertible<T, AssertionResult>::value>::type*
-      /*enabler*/
-      = nullptr)
-      : success_(success) {}
-
-#if defined(_MSC_VER) && _MSC_VER < 1910
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-  // Assignment operator.
-  AssertionResult& operator=(AssertionResult other) {
-    swap(other);
-    return *this;
-  }
-
-  // Returns true if and only if the assertion succeeded.
-  operator bool() const { return success_; }  // NOLINT
-
-  // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
-  AssertionResult operator!() const;
-
-  // Returns the text streamed into this AssertionResult. Test assertions
-  // use it when they fail (i.e., the predicate's outcome doesn't match the
-  // assertion's expectation). When nothing has been streamed into the
-  // object, returns an empty string.
-  const char* message() const {
-    return message_.get() != nullptr ? message_->c_str() : "";
-  }
-  // Deprecated; please use message() instead.
-  const char* failure_message() const { return message(); }
-
-  // Streams a custom failure message into this object.
-  template <typename T> AssertionResult& operator<<(const T& value) {
-    AppendMessage(Message() << value);
-    return *this;
-  }
-
-  // Allows streaming basic output manipulators such as endl or flush into
-  // this object.
-  AssertionResult& operator<<(
-      ::std::ostream& (*basic_manipulator)(::std::ostream& stream)) {
-    AppendMessage(Message() << basic_manipulator);
-    return *this;
-  }
-
- private:
-  // Appends the contents of message to message_.
-  void AppendMessage(const Message& a_message) {
-    if (message_.get() == nullptr) message_.reset(new ::std::string);
-    message_->append(a_message.GetString().c_str());
-  }
-
-  // Swap the contents of this AssertionResult with other.
-  void swap(AssertionResult& other);
-
-  // Stores result of the assertion predicate.
-  bool success_;
-  // Stores the message describing the condition in case the expectation
-  // construct is not satisfied with the predicate's outcome.
-  // Referenced via a pointer to avoid taking too much stack frame space
-  // with test assertions.
-  std::unique_ptr< ::std::string> message_;
-};
-
-// Makes a successful assertion result.
-GTEST_API_ AssertionResult AssertionSuccess();
-
-// Makes a failed assertion result.
-GTEST_API_ AssertionResult AssertionFailure();
-
-// Makes a failed assertion result with the given failure message.
-// Deprecated; use AssertionFailure() << msg.
-GTEST_API_ AssertionResult AssertionFailure(const Message& msg);
-
-}  // namespace testing
-
-// Includes the auto-generated header that implements a family of generic
-// predicate assertion macros. This include comes late because it relies on
-// APIs declared above.
-#include "gtest/gtest_pred_impl.h"
-
-namespace testing {
-
-// The abstract class that all tests inherit from.
-//
-// In Google Test, a unit test program contains one or many TestSuites, and
-// each TestSuite contains one or many Tests.
-//
-// When you define a test using the TEST macro, you don't need to
-// explicitly derive from Test - the TEST macro automatically does
-// this for you.
-//
-// The only time you derive from Test is when defining a test fixture
-// to be used in a TEST_F.  For example:
-//
-//   class FooTest : public testing::Test {
-//    protected:
-//     void SetUp() override { ... }
-//     void TearDown() override { ... }
-//     ...
-//   };
-//
-//   TEST_F(FooTest, Bar) { ... }
-//   TEST_F(FooTest, Baz) { ... }
-//
-// Test is not copyable.
-class GTEST_API_ Test {
- public:
-  friend class TestInfo;
-
-  // The d'tor is virtual as we intend to inherit from Test.
-  virtual ~Test();
-
-  // Sets up the stuff shared by all tests in this test case.
-  //
-  // Google Test will call Foo::SetUpTestSuite() before running the first
-  // test in test case Foo.  Hence a sub-class can define its own
-  // SetUpTestSuite() method to shadow the one defined in the super
-  // class.
-  // Failures that happen during SetUpTestSuite are logged but otherwise
-  // ignored.
-  static void SetUpTestSuite() {}
-
-  // Tears down the stuff shared by all tests in this test suite.
-  //
-  // Google Test will call Foo::TearDownTestSuite() after running the last
-  // test in test case Foo.  Hence a sub-class can define its own
-  // TearDownTestSuite() method to shadow the one defined in the super
-  // class.
-  // Failures that happen during TearDownTestSuite are logged but otherwise
-  // ignored.
-  static void TearDownTestSuite() {}
-
-  // Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  static void TearDownTestCase() {}
-  static void SetUpTestCase() {}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns true if and only if the current test has a fatal failure.
-  static bool HasFatalFailure();
-
-  // Returns true if and only if the current test has a non-fatal failure.
-  static bool HasNonfatalFailure();
-
-  // Returns true if and only if the current test was skipped.
-  static bool IsSkipped();
-
-  // Returns true if and only if the current test has a (either fatal or
-  // non-fatal) failure.
-  static bool HasFailure() { return HasFatalFailure() || HasNonfatalFailure(); }
-
-  // Logs a property for the current test, test suite, or for the entire
-  // invocation of the test program when used outside of the context of a
-  // test suite.  Only the last value for a given key is remembered.  These
-  // are public static so they can be called from utility functions that are
-  // not members of the test fixture.  Calls to RecordProperty made during
-  // lifespan of the test (from the moment its constructor starts to the
-  // moment its destructor finishes) will be output in XML as attributes of
-  // the <testcase> element.  Properties recorded from fixture's
-  // SetUpTestSuite or TearDownTestSuite are logged as attributes of the
-  // corresponding <testsuite> element.  Calls to RecordProperty made in the
-  // global context (before or after invocation of RUN_ALL_TESTS and from
-  // SetUp/TearDown method of Environment objects registered with Google
-  // Test) will be output as attributes of the <testsuites> element.
-  static void RecordProperty(const std::string& key, const std::string& value);
-  static void RecordProperty(const std::string& key, int value);
-
- protected:
-  // Creates a Test object.
-  Test();
-
-  // Sets up the test fixture.
-  virtual void SetUp();
-
-  // Tears down the test fixture.
-  virtual void TearDown();
-
- private:
-  // Returns true if and only if the current test has the same fixture class
-  // as the first test in the current test suite.
-  static bool HasSameFixtureClass();
-
-  // Runs the test after the test fixture has been set up.
-  //
-  // A sub-class must implement this to define the test logic.
-  //
-  // DO NOT OVERRIDE THIS FUNCTION DIRECTLY IN A USER PROGRAM.
-  // Instead, use the TEST or TEST_F macro.
-  virtual void TestBody() = 0;
-
-  // Sets up, executes, and tears down the test.
-  void Run();
-
-  // Deletes self.  We deliberately pick an unusual name for this
-  // internal method to avoid clashing with names used in user TESTs.
-  void DeleteSelf_() { delete this; }
-
-  const std::unique_ptr<GTEST_FLAG_SAVER_> gtest_flag_saver_;
-
-  // Often a user misspells SetUp() as Setup() and spends a long time
-  // wondering why it is never called by Google Test.  The declaration of
-  // the following method is solely for catching such an error at
-  // compile time:
-  //
-  //   - The return type is deliberately chosen to be not void, so it
-  //   will be a conflict if void Setup() is declared in the user's
-  //   test fixture.
-  //
-  //   - This method is private, so it will be another compiler error
-  //   if the method is called from the user's test fixture.
-  //
-  // DO NOT OVERRIDE THIS FUNCTION.
-  //
-  // If you see an error about overriding the following function or
-  // about it being private, you have mis-spelled SetUp() as Setup().
-  struct Setup_should_be_spelled_SetUp {};
-  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
-
-  // We disallow copying Tests.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Test);
-};
-
-typedef internal::TimeInMillis TimeInMillis;
-
-// A copyable object representing a user specified test property which can be
-// output as a key/value string pair.
-//
-// Don't inherit from TestProperty as its destructor is not virtual.
-class TestProperty {
- public:
-  // C'tor.  TestProperty does NOT have a default constructor.
-  // Always use this constructor (with parameters) to create a
-  // TestProperty object.
-  TestProperty(const std::string& a_key, const std::string& a_value) :
-    key_(a_key), value_(a_value) {
-  }
-
-  // Gets the user supplied key.
-  const char* key() const {
-    return key_.c_str();
-  }
-
-  // Gets the user supplied value.
-  const char* value() const {
-    return value_.c_str();
-  }
-
-  // Sets a new value, overriding the one supplied in the constructor.
-  void SetValue(const std::string& new_value) {
-    value_ = new_value;
-  }
-
- private:
-  // The key supplied by the user.
-  std::string key_;
-  // The value supplied by the user.
-  std::string value_;
-};
-
-// The result of a single Test.  This includes a list of
-// TestPartResults, a list of TestProperties, a count of how many
-// death tests there are in the Test, and how much time it took to run
-// the Test.
-//
-// TestResult is not copyable.
-class GTEST_API_ TestResult {
- public:
-  // Creates an empty TestResult.
-  TestResult();
-
-  // D'tor.  Do not inherit from TestResult.
-  ~TestResult();
-
-  // Gets the number of all test parts.  This is the sum of the number
-  // of successful test parts and the number of failed test parts.
-  int total_part_count() const;
-
-  // Returns the number of the test properties.
-  int test_property_count() const;
-
-  // Returns true if and only if the test passed (i.e. no test part failed).
-  bool Passed() const { return !Skipped() && !Failed(); }
-
-  // Returns true if and only if the test was skipped.
-  bool Skipped() const;
-
-  // Returns true if and only if the test failed.
-  bool Failed() const;
-
-  // Returns true if and only if the test fatally failed.
-  bool HasFatalFailure() const;
-
-  // Returns true if and only if the test has a non-fatal failure.
-  bool HasNonfatalFailure() const;
-
-  // Returns the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Gets the time of the test case start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Returns the i-th test part result among all the results. i can range from 0
-  // to total_part_count() - 1. If i is not in that range, aborts the program.
-  const TestPartResult& GetTestPartResult(int i) const;
-
-  // Returns the i-th test property. i can range from 0 to
-  // test_property_count() - 1. If i is not in that range, aborts the
-  // program.
-  const TestProperty& GetTestProperty(int i) const;
-
- private:
-  friend class TestInfo;
-  friend class TestSuite;
-  friend class UnitTest;
-  friend class internal::DefaultGlobalTestPartResultReporter;
-  friend class internal::ExecDeathTest;
-  friend class internal::TestResultAccessor;
-  friend class internal::UnitTestImpl;
-  friend class internal::WindowsDeathTest;
-  friend class internal::FuchsiaDeathTest;
-
-  // Gets the vector of TestPartResults.
-  const std::vector<TestPartResult>& test_part_results() const {
-    return test_part_results_;
-  }
-
-  // Gets the vector of TestProperties.
-  const std::vector<TestProperty>& test_properties() const {
-    return test_properties_;
-  }
-
-  // Sets the start time.
-  void set_start_timestamp(TimeInMillis start) { start_timestamp_ = start; }
-
-  // Sets the elapsed time.
-  void set_elapsed_time(TimeInMillis elapsed) { elapsed_time_ = elapsed; }
-
-  // Adds a test property to the list. The property is validated and may add
-  // a non-fatal failure if invalid (e.g., if it conflicts with reserved
-  // key names). If a property is already recorded for the same key, the
-  // value will be updated, rather than storing multiple values for the same
-  // key.  xml_element specifies the element for which the property is being
-  // recorded and is used for validation.
-  void RecordProperty(const std::string& xml_element,
-                      const TestProperty& test_property);
-
-  // Adds a failure if the key is a reserved attribute of Google Test
-  // testsuite tags.  Returns true if the property is valid.
-  // FIXME: Validate attribute names are legal and human readable.
-  static bool ValidateTestProperty(const std::string& xml_element,
-                                   const TestProperty& test_property);
-
-  // Adds a test part result to the list.
-  void AddTestPartResult(const TestPartResult& test_part_result);
-
-  // Returns the death test count.
-  int death_test_count() const { return death_test_count_; }
-
-  // Increments the death test count, returning the new count.
-  int increment_death_test_count() { return ++death_test_count_; }
-
-  // Clears the test part results.
-  void ClearTestPartResults();
-
-  // Clears the object.
-  void Clear();
-
-  // Protects mutable state of the property vector and of owned
-  // properties, whose values may be updated.
-  internal::Mutex test_properites_mutex_;
-
-  // The vector of TestPartResults
-  std::vector<TestPartResult> test_part_results_;
-  // The vector of TestProperties
-  std::vector<TestProperty> test_properties_;
-  // Running count of death tests.
-  int death_test_count_;
-  // The start time, in milliseconds since UNIX Epoch.
-  TimeInMillis start_timestamp_;
-  // The elapsed time, in milliseconds.
-  TimeInMillis elapsed_time_;
-
-  // We disallow copying TestResult.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestResult);
-};  // class TestResult
-
-// A TestInfo object stores the following information about a test:
-//
-//   Test suite name
-//   Test name
-//   Whether the test should be run
-//   A function pointer that creates the test object when invoked
-//   Test result
-//
-// The constructor of TestInfo registers itself with the UnitTest
-// singleton such that the RUN_ALL_TESTS() macro knows which tests to
-// run.
-class GTEST_API_ TestInfo {
- public:
-  // Destructs a TestInfo object.  This function is not virtual, so
-  // don't inherit from TestInfo.
-  ~TestInfo();
-
-  // Returns the test suite name.
-  const char* test_suite_name() const { return test_suite_name_.c_str(); }
-
-// Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const char* test_case_name() const { return test_suite_name(); }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns the test name.
-  const char* name() const { return name_.c_str(); }
-
-  // Returns the name of the parameter type, or NULL if this is not a typed
-  // or a type-parameterized test.
-  const char* type_param() const {
-    if (type_param_.get() != nullptr) return type_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns the text representation of the value parameter, or NULL if this
-  // is not a value-parameterized test.
-  const char* value_param() const {
-    if (value_param_.get() != nullptr) return value_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns the file name where this test is defined.
-  const char* file() const { return location_.file.c_str(); }
-
-  // Returns the line where this test is defined.
-  int line() const { return location_.line; }
-
-  // Return true if this test should not be run because it's in another shard.
-  bool is_in_another_shard() const { return is_in_another_shard_; }
-
-  // Returns true if this test should run, that is if the test is not
-  // disabled (or it is disabled but the also_run_disabled_tests flag has
-  // been specified) and its full name matches the user-specified filter.
-  //
-  // Google Test allows the user to filter the tests by their full names.
-  // The full name of a test Bar in test suite Foo is defined as
-  // "Foo.Bar".  Only the tests that match the filter will run.
-  //
-  // A filter is a colon-separated list of glob (not regex) patterns,
-  // optionally followed by a '-' and a colon-separated list of
-  // negative patterns (tests to exclude).  A test is run if it
-  // matches one of the positive patterns and does not match any of
-  // the negative patterns.
-  //
-  // For example, *A*:Foo.* is a filter that matches any string that
-  // contains the character 'A' or starts with "Foo.".
-  bool should_run() const { return should_run_; }
-
-  // Returns true if and only if this test will appear in the XML report.
-  bool is_reportable() const {
-    // The XML report includes tests matching the filter, excluding those
-    // run in other shards.
-    return matches_filter_ && !is_in_another_shard_;
-  }
-
-  // Returns the result of the test.
-  const TestResult* result() const { return &result_; }
-
- private:
-#if GTEST_HAS_DEATH_TEST
-  friend class internal::DefaultDeathTestFactory;
-#endif  // GTEST_HAS_DEATH_TEST
-  friend class Test;
-  friend class TestSuite;
-  friend class internal::UnitTestImpl;
-  friend class internal::StreamingListenerTest;
-  friend TestInfo* internal::MakeAndRegisterTestInfo(
-      const char* test_suite_name, const char* name, const char* type_param,
-      const char* value_param, internal::CodeLocation code_location,
-      internal::TypeId fixture_class_id, internal::SetUpTestSuiteFunc set_up_tc,
-      internal::TearDownTestSuiteFunc tear_down_tc,
-      internal::TestFactoryBase* factory);
-
-  // Constructs a TestInfo object. The newly constructed instance assumes
-  // ownership of the factory object.
-  TestInfo(const std::string& test_suite_name, const std::string& name,
-           const char* a_type_param,   // NULL if not a type-parameterized test
-           const char* a_value_param,  // NULL if not a value-parameterized test
-           internal::CodeLocation a_code_location,
-           internal::TypeId fixture_class_id,
-           internal::TestFactoryBase* factory);
-
-  // Increments the number of death tests encountered in this test so
-  // far.
-  int increment_death_test_count() {
-    return result_.increment_death_test_count();
-  }
-
-  // Creates the test object, runs it, records its result, and then
-  // deletes it.
-  void Run();
-
-  static void ClearTestResult(TestInfo* test_info) {
-    test_info->result_.Clear();
-  }
-
-  // These fields are immutable properties of the test.
-  const std::string test_suite_name_;    // test suite name
-  const std::string name_;               // Test name
-  // Name of the parameter type, or NULL if this is not a typed or a
-  // type-parameterized test.
-  const std::unique_ptr<const ::std::string> type_param_;
-  // Text representation of the value parameter, or NULL if this is not a
-  // value-parameterized test.
-  const std::unique_ptr<const ::std::string> value_param_;
-  internal::CodeLocation location_;
-  const internal::TypeId fixture_class_id_;  // ID of the test fixture class
-  bool should_run_;           // True if and only if this test should run
-  bool is_disabled_;          // True if and only if this test is disabled
-  bool matches_filter_;       // True if this test matches the
-                              // user-specified filter.
-  bool is_in_another_shard_;  // Will be run in another shard.
-  internal::TestFactoryBase* const factory_;  // The factory that creates
-                                              // the test object
-
-  // This field is mutable and needs to be reset before running the
-  // test for the second time.
-  TestResult result_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestInfo);
-};
-
-// A test suite, which consists of a vector of TestInfos.
-//
-// TestSuite is not copyable.
-class GTEST_API_ TestSuite {
- public:
-  // Creates a TestSuite with the given name.
-  //
-  // TestSuite does NOT have a default constructor.  Always use this
-  // constructor to create a TestSuite object.
-  //
-  // Arguments:
-  //
-  //   name:         name of the test suite
-  //   a_type_param: the name of the test's type parameter, or NULL if
-  //                 this is not a type-parameterized test.
-  //   set_up_tc:    pointer to the function that sets up the test suite
-  //   tear_down_tc: pointer to the function that tears down the test suite
-  TestSuite(const char* name, const char* a_type_param,
-            internal::SetUpTestSuiteFunc set_up_tc,
-            internal::TearDownTestSuiteFunc tear_down_tc);
-
-  // Destructor of TestSuite.
-  virtual ~TestSuite();
-
-  // Gets the name of the TestSuite.
-  const char* name() const { return name_.c_str(); }
-
-  // Returns the name of the parameter type, or NULL if this is not a
-  // type-parameterized test suite.
-  const char* type_param() const {
-    if (type_param_.get() != nullptr) return type_param_->c_str();
-    return nullptr;
-  }
-
-  // Returns true if any test in this test suite should run.
-  bool should_run() const { return should_run_; }
-
-  // Gets the number of successful tests in this test suite.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests in this test suite.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests in this test suite.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests in this test suite.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Get the number of tests in this test suite that should run.
-  int test_to_run_count() const;
-
-  // Gets the number of all tests in this test suite.
-  int total_test_count() const;
-
-  // Returns true if and only if the test suite passed.
-  bool Passed() const { return !Failed(); }
-
-  // Returns true if and only if the test suite failed.
-  bool Failed() const { return failed_test_count() > 0; }
-
-  // Returns the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Gets the time of the test suite start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Returns the i-th test among all the tests. i can range from 0 to
-  // total_test_count() - 1. If i is not in that range, returns NULL.
-  const TestInfo* GetTestInfo(int i) const;
-
-  // Returns the TestResult that holds test properties recorded during
-  // execution of SetUpTestSuite and TearDownTestSuite.
-  const TestResult& ad_hoc_test_result() const { return ad_hoc_test_result_; }
-
- private:
-  friend class Test;
-  friend class internal::UnitTestImpl;
-
-  // Gets the (mutable) vector of TestInfos in this TestSuite.
-  std::vector<TestInfo*>& test_info_list() { return test_info_list_; }
-
-  // Gets the (immutable) vector of TestInfos in this TestSuite.
-  const std::vector<TestInfo*>& test_info_list() const {
-    return test_info_list_;
-  }
-
-  // Returns the i-th test among all the tests. i can range from 0 to
-  // total_test_count() - 1. If i is not in that range, returns NULL.
-  TestInfo* GetMutableTestInfo(int i);
-
-  // Sets the should_run member.
-  void set_should_run(bool should) { should_run_ = should; }
-
-  // Adds a TestInfo to this test suite.  Will delete the TestInfo upon
-  // destruction of the TestSuite object.
-  void AddTestInfo(TestInfo * test_info);
-
-  // Clears the results of all tests in this test suite.
-  void ClearResult();
-
-  // Clears the results of all tests in the given test suite.
-  static void ClearTestSuiteResult(TestSuite* test_suite) {
-    test_suite->ClearResult();
-  }
-
-  // Runs every test in this TestSuite.
-  void Run();
-
-  // Runs SetUpTestSuite() for this TestSuite.  This wrapper is needed
-  // for catching exceptions thrown from SetUpTestSuite().
-  void RunSetUpTestSuite() {
-    if (set_up_tc_ != nullptr) {
-      (*set_up_tc_)();
-    }
-  }
-
-  // Runs TearDownTestSuite() for this TestSuite.  This wrapper is
-  // needed for catching exceptions thrown from TearDownTestSuite().
-  void RunTearDownTestSuite() {
-    if (tear_down_tc_ != nullptr) {
-      (*tear_down_tc_)();
-    }
-  }
-
-  // Returns true if and only if test passed.
-  static bool TestPassed(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Passed();
-  }
-
-  // Returns true if and only if test skipped.
-  static bool TestSkipped(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Skipped();
-  }
-
-  // Returns true if and only if test failed.
-  static bool TestFailed(const TestInfo* test_info) {
-    return test_info->should_run() && test_info->result()->Failed();
-  }
-
-  // Returns true if and only if the test is disabled and will be reported in
-  // the XML report.
-  static bool TestReportableDisabled(const TestInfo* test_info) {
-    return test_info->is_reportable() && test_info->is_disabled_;
-  }
-
-  // Returns true if and only if test is disabled.
-  static bool TestDisabled(const TestInfo* test_info) {
-    return test_info->is_disabled_;
-  }
-
-  // Returns true if and only if this test will appear in the XML report.
-  static bool TestReportable(const TestInfo* test_info) {
-    return test_info->is_reportable();
-  }
-
-  // Returns true if the given test should run.
-  static bool ShouldRunTest(const TestInfo* test_info) {
-    return test_info->should_run();
-  }
-
-  // Shuffles the tests in this test suite.
-  void ShuffleTests(internal::Random* random);
-
-  // Restores the test order to before the first shuffle.
-  void UnshuffleTests();
-
-  // Name of the test suite.
-  std::string name_;
-  // Name of the parameter type, or NULL if this is not a typed or a
-  // type-parameterized test.
-  const std::unique_ptr<const ::std::string> type_param_;
-  // The vector of TestInfos in their original order.  It owns the
-  // elements in the vector.
-  std::vector<TestInfo*> test_info_list_;
-  // Provides a level of indirection for the test list to allow easy
-  // shuffling and restoring the test order.  The i-th element in this
-  // vector is the index of the i-th test in the shuffled test list.
-  std::vector<int> test_indices_;
-  // Pointer to the function that sets up the test suite.
-  internal::SetUpTestSuiteFunc set_up_tc_;
-  // Pointer to the function that tears down the test suite.
-  internal::TearDownTestSuiteFunc tear_down_tc_;
-  // True if and only if any test in this test suite should run.
-  bool should_run_;
-  // The start time, in milliseconds since UNIX Epoch.
-  TimeInMillis start_timestamp_;
-  // Elapsed time, in milliseconds.
-  TimeInMillis elapsed_time_;
-  // Holds test properties recorded during execution of SetUpTestSuite and
-  // TearDownTestSuite.
-  TestResult ad_hoc_test_result_;
-
-  // We disallow copying TestSuites.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestSuite);
-};
-
-// An Environment object is capable of setting up and tearing down an
-// environment.  You should subclass this to define your own
-// environment(s).
-//
-// An Environment object does the set-up and tear-down in virtual
-// methods SetUp() and TearDown() instead of the constructor and the
-// destructor, as:
-//
-//   1. You cannot safely throw from a destructor.  This is a problem
-//      as in some cases Google Test is used where exceptions are enabled, and
-//      we may want to implement ASSERT_* using exceptions where they are
-//      available.
-//   2. You cannot use ASSERT_* directly in a constructor or
-//      destructor.
-class Environment {
- public:
-  // The d'tor is virtual as we need to subclass Environment.
-  virtual ~Environment() {}
-
-  // Override this to define how to set up the environment.
-  virtual void SetUp() {}
-
-  // Override this to define how to tear down the environment.
-  virtual void TearDown() {}
- private:
-  // If you see an error about overriding the following function or
-  // about it being private, you have mis-spelled SetUp() as Setup().
-  struct Setup_should_be_spelled_SetUp {};
-  virtual Setup_should_be_spelled_SetUp* Setup() { return nullptr; }
-};
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Exception which can be thrown from TestEventListener::OnTestPartResult.
-class GTEST_API_ AssertionException
-    : public internal::GoogleTestFailureException {
- public:
-  explicit AssertionException(const TestPartResult& result)
-      : GoogleTestFailureException(result) {}
-};
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// The interface for tracing execution of tests. The methods are organized in
-// the order the corresponding events are fired.
-class TestEventListener {
- public:
-  virtual ~TestEventListener() {}
-
-  // Fired before any test activity starts.
-  virtual void OnTestProgramStart(const UnitTest& unit_test) = 0;
-
-  // Fired before each iteration of tests starts.  There may be more than
-  // one iteration if GTEST_FLAG(repeat) is set. iteration is the iteration
-  // index, starting from 0.
-  virtual void OnTestIterationStart(const UnitTest& unit_test,
-                                    int iteration) = 0;
-
-  // Fired before environment set-up for each iteration of tests starts.
-  virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test) = 0;
-
-  // Fired after environment set-up for each iteration of tests ends.
-  virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) = 0;
-
-  // Fired before the test suite starts.
-  virtual void OnTestSuiteStart(const TestSuite& /*test_suite*/) {}
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Fired before the test starts.
-  virtual void OnTestStart(const TestInfo& test_info) = 0;
-
-  // Fired after a failed assertion or a SUCCEED() invocation.
-  // If you want to throw an exception from this function to skip to the next
-  // TEST, it must be AssertionException defined above, or inherited from it.
-  virtual void OnTestPartResult(const TestPartResult& test_part_result) = 0;
-
-  // Fired after the test ends.
-  virtual void OnTestEnd(const TestInfo& test_info) = 0;
-
-  // Fired after the test suite ends.
-  virtual void OnTestSuiteEnd(const TestSuite& /*test_suite*/) {}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Fired before environment tear-down for each iteration of tests starts.
-  virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test) = 0;
-
-  // Fired after environment tear-down for each iteration of tests ends.
-  virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) = 0;
-
-  // Fired after each iteration of tests finishes.
-  virtual void OnTestIterationEnd(const UnitTest& unit_test,
-                                  int iteration) = 0;
-
-  // Fired after all test activities have ended.
-  virtual void OnTestProgramEnd(const UnitTest& unit_test) = 0;
-};
-
-// The convenience class for users who need to override just one or two
-// methods and are not concerned that a possible change to a signature of
-// the methods they override will not be caught during the build.  For
-// comments about each method please see the definition of TestEventListener
-// above.
-class EmptyTestEventListener : public TestEventListener {
- public:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {}
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {}
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {}
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {}
-  void OnTestEnd(const TestInfo& /*test_info*/) override {}
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {}
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int /*iteration*/) override {}
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-};
-
-// TestEventListeners lets users add listeners to track events in Google Test.
-class GTEST_API_ TestEventListeners {
- public:
-  TestEventListeners();
-  ~TestEventListeners();
-
-  // Appends an event listener to the end of the list. Google Test assumes
-  // the ownership of the listener (i.e. it will delete the listener when
-  // the test program finishes).
-  void Append(TestEventListener* listener);
-
-  // Removes the given event listener from the list and returns it.  It then
-  // becomes the caller's responsibility to delete the listener. Returns
-  // NULL if the listener is not found in the list.
-  TestEventListener* Release(TestEventListener* listener);
-
-  // Returns the standard listener responsible for the default console
-  // output.  Can be removed from the listeners list to shut down default
-  // console output.  Note that removing this object from the listener list
-  // with Release transfers its ownership to the caller and makes this
-  // function return NULL the next time.
-  TestEventListener* default_result_printer() const {
-    return default_result_printer_;
-  }
-
-  // Returns the standard listener responsible for the default XML output
-  // controlled by the --gtest_output=xml flag.  Can be removed from the
-  // listeners list by users who want to shut down the default XML output
-  // controlled by this flag and substitute it with custom one.  Note that
-  // removing this object from the listener list with Release transfers its
-  // ownership to the caller and makes this function return NULL the next
-  // time.
-  TestEventListener* default_xml_generator() const {
-    return default_xml_generator_;
-  }
-
- private:
-  friend class TestSuite;
-  friend class TestInfo;
-  friend class internal::DefaultGlobalTestPartResultReporter;
-  friend class internal::NoExecDeathTest;
-  friend class internal::TestEventListenersAccessor;
-  friend class internal::UnitTestImpl;
-
-  // Returns repeater that broadcasts the TestEventListener events to all
-  // subscribers.
-  TestEventListener* repeater();
-
-  // Sets the default_result_printer attribute to the provided listener.
-  // The listener is also added to the listener list and previous
-  // default_result_printer is removed from it and deleted. The listener can
-  // also be NULL in which case it will not be added to the list. Does
-  // nothing if the previous and the current listener objects are the same.
-  void SetDefaultResultPrinter(TestEventListener* listener);
-
-  // Sets the default_xml_generator attribute to the provided listener.  The
-  // listener is also added to the listener list and previous
-  // default_xml_generator is removed from it and deleted. The listener can
-  // also be NULL in which case it will not be added to the list. Does
-  // nothing if the previous and the current listener objects are the same.
-  void SetDefaultXmlGenerator(TestEventListener* listener);
-
-  // Controls whether events will be forwarded by the repeater to the
-  // listeners in the list.
-  bool EventForwardingEnabled() const;
-  void SuppressEventForwarding();
-
-  // The actual list of listeners.
-  internal::TestEventRepeater* repeater_;
-  // Listener responsible for the standard result output.
-  TestEventListener* default_result_printer_;
-  // Listener responsible for the creation of the XML output file.
-  TestEventListener* default_xml_generator_;
-
-  // We disallow copying TestEventListeners.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventListeners);
-};
-
-// A UnitTest consists of a vector of TestSuites.
-//
-// This is a singleton class.  The only instance of UnitTest is
-// created when UnitTest::GetInstance() is first called.  This
-// instance is never deleted.
-//
-// UnitTest is not copyable.
-//
-// This class is thread-safe as long as the methods are called
-// according to their specification.
-class GTEST_API_ UnitTest {
- public:
-  // Gets the singleton UnitTest object.  The first time this method
-  // is called, a UnitTest object is constructed and returned.
-  // Consecutive calls will return the same object.
-  static UnitTest* GetInstance();
-
-  // Runs all tests in this UnitTest object and prints the result.
-  // Returns 0 if successful, or 1 otherwise.
-  //
-  // This method can only be called from the main thread.
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  int Run() GTEST_MUST_USE_RESULT_;
-
-  // Returns the working directory when the first TEST() or TEST_F()
-  // was executed.  The UnitTest object owns the string.
-  const char* original_working_dir() const;
-
-  // Returns the TestSuite object for the test that's currently running,
-  // or NULL if no test is running.
-  const TestSuite* current_test_suite() const GTEST_LOCK_EXCLUDED_(mutex_);
-
-// Legacy API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* current_test_case() const GTEST_LOCK_EXCLUDED_(mutex_);
-#endif
-
-  // Returns the TestInfo object for the test that's currently running,
-  // or NULL if no test is running.
-  const TestInfo* current_test_info() const
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Returns the random seed used at the start of the current test run.
-  int random_seed() const;
-
-  // Returns the ParameterizedTestSuiteRegistry object used to keep track of
-  // value-parameterized tests and instantiate and register them.
-  //
-  // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry()
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Gets the number of successful test suites.
-  int successful_test_suite_count() const;
-
-  // Gets the number of failed test suites.
-  int failed_test_suite_count() const;
-
-  // Gets the number of all test suites.
-  int total_test_suite_count() const;
-
-  // Gets the number of all test suites that contain at least one test
-  // that should run.
-  int test_suite_to_run_count() const;
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  int successful_test_case_count() const;
-  int failed_test_case_count() const;
-  int total_test_case_count() const;
-  int test_case_to_run_count() const;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Gets the number of successful tests.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Gets the number of all tests.
-  int total_test_count() const;
-
-  // Gets the number of tests that should run.
-  int test_to_run_count() const;
-
-  // Gets the time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const;
-
-  // Gets the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const;
-
-  // Returns true if and only if the unit test passed (i.e. all test suites
-  // passed).
-  bool Passed() const;
-
-  // Returns true if and only if the unit test failed (i.e. some test suite
-  // failed or something outside of all tests failed).
-  bool Failed() const;
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  const TestSuite* GetTestSuite(int i) const;
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* GetTestCase(int i) const;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Returns the TestResult containing information on test failures and
-  // properties logged outside of individual test suites.
-  const TestResult& ad_hoc_test_result() const;
-
-  // Returns the list of event listeners that can be used to track events
-  // inside Google Test.
-  TestEventListeners& listeners();
-
- private:
-  // Registers and returns a global test environment.  When a test
-  // program is run, all global test environments will be set-up in
-  // the order they were registered.  After all tests in the program
-  // have finished, all global test environments will be torn-down in
-  // the *reverse* order they were registered.
-  //
-  // The UnitTest object takes ownership of the given environment.
-  //
-  // This method can only be called from the main thread.
-  Environment* AddEnvironment(Environment* env);
-
-  // Adds a TestPartResult to the current TestResult object.  All
-  // Google Test assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc)
-  // eventually call this to report their results.  The user code
-  // should use the assertion macros instead of calling this directly.
-  void AddTestPartResult(TestPartResult::Type result_type,
-                         const char* file_name,
-                         int line_number,
-                         const std::string& message,
-                         const std::string& os_stack_trace)
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Adds a TestProperty to the current TestResult object when invoked from
-  // inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
-  // from SetUpTestSuite or TearDownTestSuite, or to the global property set
-  // when invoked elsewhere.  If the result already contains a property with
-  // the same key, the value will be updated.
-  void RecordProperty(const std::string& key, const std::string& value);
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  TestSuite* GetMutableTestSuite(int i);
-
-  // Accessors for the implementation object.
-  internal::UnitTestImpl* impl() { return impl_; }
-  const internal::UnitTestImpl* impl() const { return impl_; }
-
-  // These classes and functions are friends as they need to access private
-  // members of UnitTest.
-  friend class ScopedTrace;
-  friend class Test;
-  friend class internal::AssertHelper;
-  friend class internal::StreamingListenerTest;
-  friend class internal::UnitTestRecordPropertyTestHelper;
-  friend Environment* AddGlobalTestEnvironment(Environment* env);
-  friend internal::UnitTestImpl* internal::GetUnitTestImpl();
-  friend void internal::ReportFailureInUnknownLocation(
-      TestPartResult::Type result_type,
-      const std::string& message);
-
-  // Creates an empty UnitTest.
-  UnitTest();
-
-  // D'tor
-  virtual ~UnitTest();
-
-  // Pushes a trace defined by SCOPED_TRACE() on to the per-thread
-  // Google Test trace stack.
-  void PushGTestTrace(const internal::TraceInfo& trace)
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Pops a trace from the per-thread Google Test trace stack.
-  void PopGTestTrace()
-      GTEST_LOCK_EXCLUDED_(mutex_);
-
-  // Protects mutable state in *impl_.  This is mutable as some const
-  // methods need to lock it too.
-  mutable internal::Mutex mutex_;
-
-  // Opaque implementation object.  This field is never changed once
-  // the object is constructed.  We don't mark it as const here, as
-  // doing so will cause a warning in the constructor of UnitTest.
-  // Mutable state in *impl_ is protected by mutex_.
-  internal::UnitTestImpl* impl_;
-
-  // We disallow copying UnitTest.
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTest);
-};
-
-// A convenient wrapper for adding an environment for the test
-// program.
-//
-// You should call this before RUN_ALL_TESTS() is called, probably in
-// main().  If you use gtest_main, you need to call this before main()
-// starts for it to take effect.  For example, you can define a global
-// variable like this:
-//
-//   testing::Environment* const foo_env =
-//       testing::AddGlobalTestEnvironment(new FooEnvironment);
-//
-// However, we strongly recommend you to write your own main() and
-// call AddGlobalTestEnvironment() there, as relying on initialization
-// of global variables makes the code harder to read and may cause
-// problems when you register multiple environments from different
-// translation units and the environments have dependencies among them
-// (remember that the compiler doesn't guarantee the order in which
-// global variables from different translation units are initialized).
-inline Environment* AddGlobalTestEnvironment(Environment* env) {
-  return UnitTest::GetInstance()->AddEnvironment(env);
-}
-
-// Initializes Google Test.  This must be called before calling
-// RUN_ALL_TESTS().  In particular, it parses a command line for the
-// flags that Google Test recognizes.  Whenever a Google Test flag is
-// seen, it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Test flag variables are
-// updated.
-//
-// Calling the function for the second time has no user-visible effect.
-GTEST_API_ void InitGoogleTest(int* argc, char** argv);
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-GTEST_API_ void InitGoogleTest();
-
-namespace internal {
-
-// Separate the error generating code from the code path to reduce the stack
-// frame size of CmpHelperEQ. This helps reduce the overhead of some sanitizers
-// when calling EXPECT_* in a tight loop.
-template <typename T1, typename T2>
-AssertionResult CmpHelperEQFailure(const char* lhs_expression,
-                                   const char* rhs_expression,
-                                   const T1& lhs, const T2& rhs) {
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   FormatForComparisonFailureMessage(lhs, rhs),
-                   FormatForComparisonFailureMessage(rhs, lhs),
-                   false);
-}
-
-// This block of code defines operator==/!=
-// to block lexical scope lookup.
-// It prevents using invalid operator==/!= defined at namespace scope.
-struct faketype {};
-inline bool operator==(faketype, faketype) { return true; }
-inline bool operator!=(faketype, faketype) { return false; }
-
-// The helper function for {ASSERT|EXPECT}_EQ.
-template <typename T1, typename T2>
-AssertionResult CmpHelperEQ(const char* lhs_expression,
-                            const char* rhs_expression,
-                            const T1& lhs,
-                            const T2& rhs) {
-  if (lhs == rhs) {
-    return AssertionSuccess();
-  }
-
-  return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
-}
-
-// With this overloaded version, we allow anonymous enums to be used
-// in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous enums
-// can be implicitly cast to BiggestInt.
-GTEST_API_ AssertionResult CmpHelperEQ(const char* lhs_expression,
-                                       const char* rhs_expression,
-                                       BiggestInt lhs,
-                                       BiggestInt rhs);
-
-class EqHelper {
- public:
-  // This templatized version is for the general case.
-  template <
-      typename T1, typename T2,
-      // Disable this overload for cases where one argument is a pointer
-      // and the other is the null pointer constant.
-      typename std::enable_if<!std::is_integral<T1>::value ||
-                              !std::is_pointer<T2>::value>::type* = nullptr>
-  static AssertionResult Compare(const char* lhs_expression,
-                                 const char* rhs_expression, const T1& lhs,
-                                 const T2& rhs) {
-    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
-  }
-
-  // With this overloaded version, we allow anonymous enums to be used
-  // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous
-  // enums can be implicitly cast to BiggestInt.
-  //
-  // Even though its body looks the same as the above version, we
-  // cannot merge the two, as it will make anonymous enums unhappy.
-  static AssertionResult Compare(const char* lhs_expression,
-                                 const char* rhs_expression,
-                                 BiggestInt lhs,
-                                 BiggestInt rhs) {
-    return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
-  }
-
-  template <typename T>
-  static AssertionResult Compare(
-      const char* lhs_expression, const char* rhs_expression,
-      // Handle cases where '0' is used as a null pointer literal.
-      std::nullptr_t /* lhs */, T* rhs) {
-    // We already know that 'lhs' is a null pointer.
-    return CmpHelperEQ(lhs_expression, rhs_expression, static_cast<T*>(nullptr),
-                       rhs);
-  }
-};
-
-// Separate the error generating code from the code path to reduce the stack
-// frame size of CmpHelperOP. This helps reduce the overhead of some sanitizers
-// when calling EXPECT_OP in a tight loop.
-template <typename T1, typename T2>
-AssertionResult CmpHelperOpFailure(const char* expr1, const char* expr2,
-                                   const T1& val1, const T2& val2,
-                                   const char* op) {
-  return AssertionFailure()
-         << "Expected: (" << expr1 << ") " << op << " (" << expr2
-         << "), actual: " << FormatForComparisonFailureMessage(val1, val2)
-         << " vs " << FormatForComparisonFailureMessage(val2, val1);
-}
-
-// A macro for implementing the helper functions needed to implement
-// ASSERT_?? and EXPECT_??.  It is here just to avoid copy-and-paste
-// of similar code.
-//
-// For each templatized helper function, we also define an overloaded
-// version for BiggestInt in order to reduce code bloat and allow
-// anonymous enums to be used with {ASSERT|EXPECT}_?? when compiled
-// with gcc 4.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
-template <typename T1, typename T2>\
-AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
-                                   const T1& val1, const T2& val2) {\
-  if (val1 op val2) {\
-    return AssertionSuccess();\
-  } else {\
-    return CmpHelperOpFailure(expr1, expr2, val1, val2, #op);\
-  }\
-}\
-GTEST_API_ AssertionResult CmpHelper##op_name(\
-    const char* expr1, const char* expr2, BiggestInt val1, BiggestInt val2)
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-
-// Implements the helper function for {ASSERT|EXPECT}_NE
-GTEST_IMPL_CMP_HELPER_(NE, !=);
-// Implements the helper function for {ASSERT|EXPECT}_LE
-GTEST_IMPL_CMP_HELPER_(LE, <=);
-// Implements the helper function for {ASSERT|EXPECT}_LT
-GTEST_IMPL_CMP_HELPER_(LT, <);
-// Implements the helper function for {ASSERT|EXPECT}_GE
-GTEST_IMPL_CMP_HELPER_(GE, >=);
-// Implements the helper function for {ASSERT|EXPECT}_GT
-GTEST_IMPL_CMP_HELPER_(GT, >);
-
-#undef GTEST_IMPL_CMP_HELPER_
-
-// The helper function for {ASSERT|EXPECT}_STREQ.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const char* s1,
-                                          const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* s1_expression,
-                                              const char* s2_expression,
-                                              const char* s1,
-                                              const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRNE.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const char* s1,
-                                          const char* s2);
-
-// The helper function for {ASSERT|EXPECT}_STRCASENE.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
-                                              const char* s2_expression,
-                                              const char* s1,
-                                              const char* s2);
-
-
-// Helper function for *_STREQ on wide strings.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const wchar_t* s1,
-                                          const wchar_t* s2);
-
-// Helper function for *_STRNE on wide strings.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                                          const char* s2_expression,
-                                          const wchar_t* s1,
-                                          const wchar_t* s2);
-
-}  // namespace internal
-
-// IsSubstring() and IsNotSubstring() are intended to be used as the
-// first argument to {EXPECT,ASSERT}_PRED_FORMAT2(), not by
-// themselves.  They check whether needle is a substring of haystack
-// (NULL is considered a substring of itself only), and return an
-// appropriate error message when they fail.
-//
-// The {needle,haystack}_expr arguments are the stringified
-// expressions that generated the two real arguments.
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack);
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack);
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack);
-
-#if GTEST_HAS_STD_WSTRING
-GTEST_API_ AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack);
-GTEST_API_ AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack);
-#endif  // GTEST_HAS_STD_WSTRING
-
-namespace internal {
-
-// Helper template function for comparing floating-points.
-//
-// Template parameter:
-//
-//   RawType: the raw floating-point type (either float or double)
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-template <typename RawType>
-AssertionResult CmpHelperFloatingPointEQ(const char* lhs_expression,
-                                         const char* rhs_expression,
-                                         RawType lhs_value,
-                                         RawType rhs_value) {
-  const FloatingPoint<RawType> lhs(lhs_value), rhs(rhs_value);
-
-  if (lhs.AlmostEquals(rhs)) {
-    return AssertionSuccess();
-  }
-
-  ::std::stringstream lhs_ss;
-  lhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-         << lhs_value;
-
-  ::std::stringstream rhs_ss;
-  rhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-         << rhs_value;
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   StringStreamToString(&lhs_ss),
-                   StringStreamToString(&rhs_ss),
-                   false);
-}
-
-// Helper function for implementing ASSERT_NEAR.
-//
-// INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
-GTEST_API_ AssertionResult DoubleNearPredFormat(const char* expr1,
-                                                const char* expr2,
-                                                const char* abs_error_expr,
-                                                double val1,
-                                                double val2,
-                                                double abs_error);
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-// A class that enables one to stream messages to assertion macros
-class GTEST_API_ AssertHelper {
- public:
-  // Constructor.
-  AssertHelper(TestPartResult::Type type,
-               const char* file,
-               int line,
-               const char* message);
-  ~AssertHelper();
-
-  // Message assignment is a semantic trick to enable assertion
-  // streaming; see the GTEST_MESSAGE_ macro below.
-  void operator=(const Message& message) const;
-
- private:
-  // We put our data in a struct so that the size of the AssertHelper class can
-  // be as small as possible.  This is important because gcc is incapable of
-  // re-using stack space even for temporary variables, so every EXPECT_EQ
-  // reserves stack space for another AssertHelper.
-  struct AssertHelperData {
-    AssertHelperData(TestPartResult::Type t,
-                     const char* srcfile,
-                     int line_num,
-                     const char* msg)
-        : type(t), file(srcfile), line(line_num), message(msg) { }
-
-    TestPartResult::Type const type;
-    const char* const file;
-    int const line;
-    std::string const message;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelperData);
-  };
-
-  AssertHelperData* const data_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelper);
-};
-
-enum GTestColor { COLOR_DEFAULT, COLOR_RED, COLOR_GREEN, COLOR_YELLOW };
-
-GTEST_API_ GTEST_ATTRIBUTE_PRINTF_(2, 3) void ColoredPrintf(GTestColor color,
-                                                            const char* fmt,
-                                                            ...);
-
-}  // namespace internal
-
-// The pure interface class that all value-parameterized tests inherit from.
-// A value-parameterized class must inherit from both ::testing::Test and
-// ::testing::WithParamInterface. In most cases that just means inheriting
-// from ::testing::TestWithParam, but more complicated test hierarchies
-// may need to inherit from Test and WithParamInterface at different levels.
-//
-// This interface has support for accessing the test parameter value via
-// the GetParam() method.
-//
-// Use it with one of the parameter generator defining functions, like Range(),
-// Values(), ValuesIn(), Bool(), and Combine().
-//
-// class FooTest : public ::testing::TestWithParam<int> {
-//  protected:
-//   FooTest() {
-//     // Can use GetParam() here.
-//   }
-//   ~FooTest() override {
-//     // Can use GetParam() here.
-//   }
-//   void SetUp() override {
-//     // Can use GetParam() here.
-//   }
-//   void TearDown override {
-//     // Can use GetParam() here.
-//   }
-// };
-// TEST_P(FooTest, DoesBar) {
-//   // Can use GetParam() method here.
-//   Foo foo;
-//   ASSERT_TRUE(foo.DoesBar(GetParam()));
-// }
-// INSTANTIATE_TEST_SUITE_P(OneToTenRange, FooTest, ::testing::Range(1, 10));
-
-template <typename T>
-class WithParamInterface {
- public:
-  typedef T ParamType;
-  virtual ~WithParamInterface() {}
-
-  // The current parameter value. Is also available in the test fixture's
-  // constructor.
-  static const ParamType& GetParam() {
-    GTEST_CHECK_(parameter_ != nullptr)
-        << "GetParam() can only be called inside a value-parameterized test "
-        << "-- did you intend to write TEST_P instead of TEST_F?";
-    return *parameter_;
-  }
-
- private:
-  // Sets parameter value. The caller is responsible for making sure the value
-  // remains alive and unchanged throughout the current test.
-  static void SetParam(const ParamType* parameter) {
-    parameter_ = parameter;
-  }
-
-  // Static value used for accessing parameter during a test lifetime.
-  static const ParamType* parameter_;
-
-  // TestClass must be a subclass of WithParamInterface<T> and Test.
-  template <class TestClass> friend class internal::ParameterizedTestFactory;
-};
-
-template <typename T>
-const T* WithParamInterface<T>::parameter_ = nullptr;
-
-// Most value-parameterized classes can ignore the existence of
-// WithParamInterface, and can just inherit from ::testing::TestWithParam.
-
-template <typename T>
-class TestWithParam : public Test, public WithParamInterface<T> {
-};
-
-// Macros for indicating success/failure in test code.
-
-// Skips test in runtime.
-// Skipping test aborts current function.
-// Skipped tests are neither successful nor failed.
-#define GTEST_SKIP() GTEST_SKIP_("Skipped")
-
-// ADD_FAILURE unconditionally adds a failure to the current test.
-// SUCCEED generates a success - it doesn't automatically make the
-// current test successful, as a test is only successful when it has
-// no failure.
-//
-// EXPECT_* verifies that a certain condition is satisfied.  If not,
-// it behaves like ADD_FAILURE.  In particular:
-//
-//   EXPECT_TRUE  verifies that a Boolean condition is true.
-//   EXPECT_FALSE verifies that a Boolean condition is false.
-//
-// FAIL and ASSERT_* are similar to ADD_FAILURE and EXPECT_*, except
-// that they will also abort the current function on failure.  People
-// usually want the fail-fast behavior of FAIL and ASSERT_*, but those
-// writing data-driven tests often find themselves using ADD_FAILURE
-// and EXPECT_* more.
-
-// Generates a nonfatal failure with a generic message.
-#define ADD_FAILURE() GTEST_NONFATAL_FAILURE_("Failed")
-
-// Generates a nonfatal failure at the given source file location with
-// a generic message.
-#define ADD_FAILURE_AT(file, line) \
-  GTEST_MESSAGE_AT_(file, line, "Failed", \
-                    ::testing::TestPartResult::kNonFatalFailure)
-
-// Generates a fatal failure with a generic message.
-#define GTEST_FAIL() GTEST_FATAL_FAILURE_("Failed")
-
-// Like GTEST_FAIL(), but at the given source file location.
-#define GTEST_FAIL_AT(file, line)         \
-  GTEST_MESSAGE_AT_(file, line, "Failed", \
-                    ::testing::TestPartResult::kFatalFailure)
-
-// Define this macro to 1 to omit the definition of FAIL(), which is a
-// generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_FAIL
-# define FAIL() GTEST_FAIL()
-#endif
-
-// Generates a success with a generic message.
-#define GTEST_SUCCEED() GTEST_SUCCESS_("Succeeded")
-
-// Define this macro to 1 to omit the definition of SUCCEED(), which
-// is a generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_SUCCEED
-# define SUCCEED() GTEST_SUCCEED()
-#endif
-
-// Macros for testing exceptions.
-//
-//    * {ASSERT|EXPECT}_THROW(statement, expected_exception):
-//         Tests that the statement throws the expected exception.
-//    * {ASSERT|EXPECT}_NO_THROW(statement):
-//         Tests that the statement doesn't throw any exception.
-//    * {ASSERT|EXPECT}_ANY_THROW(statement):
-//         Tests that the statement throws an exception.
-
-#define EXPECT_THROW(statement, expected_exception) \
-  GTEST_TEST_THROW_(statement, expected_exception, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_NO_THROW(statement) \
-  GTEST_TEST_NO_THROW_(statement, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_ANY_THROW(statement) \
-  GTEST_TEST_ANY_THROW_(statement, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_THROW(statement, expected_exception) \
-  GTEST_TEST_THROW_(statement, expected_exception, GTEST_FATAL_FAILURE_)
-#define ASSERT_NO_THROW(statement) \
-  GTEST_TEST_NO_THROW_(statement, GTEST_FATAL_FAILURE_)
-#define ASSERT_ANY_THROW(statement) \
-  GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)
-
-// Boolean assertions. Condition can be either a Boolean expression or an
-// AssertionResult. For more information on how to use AssertionResult with
-// these macros see comments on that class.
-#define EXPECT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
-                      GTEST_NONFATAL_FAILURE_)
-#define EXPECT_FALSE(condition) \
-  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
-                      GTEST_NONFATAL_FAILURE_)
-#define ASSERT_TRUE(condition) \
-  GTEST_TEST_BOOLEAN_(condition, #condition, false, true, \
-                      GTEST_FATAL_FAILURE_)
-#define ASSERT_FALSE(condition) \
-  GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
-                      GTEST_FATAL_FAILURE_)
-
-// Macros for testing equalities and inequalities.
-//
-//    * {ASSERT|EXPECT}_EQ(v1, v2): Tests that v1 == v2
-//    * {ASSERT|EXPECT}_NE(v1, v2): Tests that v1 != v2
-//    * {ASSERT|EXPECT}_LT(v1, v2): Tests that v1 < v2
-//    * {ASSERT|EXPECT}_LE(v1, v2): Tests that v1 <= v2
-//    * {ASSERT|EXPECT}_GT(v1, v2): Tests that v1 > v2
-//    * {ASSERT|EXPECT}_GE(v1, v2): Tests that v1 >= v2
-//
-// When they are not, Google Test prints both the tested expressions and
-// their actual values.  The values must be compatible built-in types,
-// or you will get a compiler error.  By "compatible" we mean that the
-// values can be compared by the respective operator.
-//
-// Note:
-//
-//   1. It is possible to make a user-defined type work with
-//   {ASSERT|EXPECT}_??(), but that requires overloading the
-//   comparison operators and is thus discouraged by the Google C++
-//   Usage Guide.  Therefore, you are advised to use the
-//   {ASSERT|EXPECT}_TRUE() macro to assert that two objects are
-//   equal.
-//
-//   2. The {ASSERT|EXPECT}_??() macros do pointer comparisons on
-//   pointers (in particular, C strings).  Therefore, if you use it
-//   with two C strings, you are testing how their locations in memory
-//   are related, not how their content is related.  To compare two C
-//   strings by content, use {ASSERT|EXPECT}_STR*().
-//
-//   3. {ASSERT|EXPECT}_EQ(v1, v2) is preferred to
-//   {ASSERT|EXPECT}_TRUE(v1 == v2), as the former tells you
-//   what the actual value is when it fails, and similarly for the
-//   other comparisons.
-//
-//   4. Do not depend on the order in which {ASSERT|EXPECT}_??()
-//   evaluate their arguments, which is undefined.
-//
-//   5. These macros evaluate their arguments exactly once.
-//
-// Examples:
-//
-//   EXPECT_NE(Foo(), 5);
-//   EXPECT_EQ(a_pointer, NULL);
-//   ASSERT_LT(i, array_size);
-//   ASSERT_GT(records.size(), 0) << "There is no record left.";
-
-#define EXPECT_EQ(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
-#define EXPECT_NE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
-#define EXPECT_LE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
-#define EXPECT_LT(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
-#define EXPECT_GE(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
-#define EXPECT_GT(val1, val2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
-
-#define GTEST_ASSERT_EQ(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::EqHelper::Compare, val1, val2)
-#define GTEST_ASSERT_NE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
-#define GTEST_ASSERT_LE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
-#define GTEST_ASSERT_LT(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
-#define GTEST_ASSERT_GE(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
-#define GTEST_ASSERT_GT(val1, val2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
-
-// Define macro GTEST_DONT_DEFINE_ASSERT_XY to 1 to omit the definition of
-// ASSERT_XY(), which clashes with some users' own code.
-
-#if !GTEST_DONT_DEFINE_ASSERT_EQ
-# define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_NE
-# define ASSERT_NE(val1, val2) GTEST_ASSERT_NE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_LE
-# define ASSERT_LE(val1, val2) GTEST_ASSERT_LE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_LT
-# define ASSERT_LT(val1, val2) GTEST_ASSERT_LT(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_GE
-# define ASSERT_GE(val1, val2) GTEST_ASSERT_GE(val1, val2)
-#endif
-
-#if !GTEST_DONT_DEFINE_ASSERT_GT
-# define ASSERT_GT(val1, val2) GTEST_ASSERT_GT(val1, val2)
-#endif
-
-// C-string Comparisons.  All tests treat NULL and any non-NULL string
-// as different.  Two NULLs are equal.
-//
-//    * {ASSERT|EXPECT}_STREQ(s1, s2):     Tests that s1 == s2
-//    * {ASSERT|EXPECT}_STRNE(s1, s2):     Tests that s1 != s2
-//    * {ASSERT|EXPECT}_STRCASEEQ(s1, s2): Tests that s1 == s2, ignoring case
-//    * {ASSERT|EXPECT}_STRCASENE(s1, s2): Tests that s1 != s2, ignoring case
-//
-// For wide or narrow string objects, you can use the
-// {ASSERT|EXPECT}_??() macros.
-//
-// Don't depend on the order in which the arguments are evaluated,
-// which is undefined.
-//
-// These macros evaluate their arguments exactly once.
-
-#define EXPECT_STREQ(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
-#define EXPECT_STRNE(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define EXPECT_STRCASEEQ(s1, s2) \
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
-#define EXPECT_STRCASENE(s1, s2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
-
-#define ASSERT_STREQ(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
-#define ASSERT_STRNE(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
-#define ASSERT_STRCASEEQ(s1, s2) \
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
-#define ASSERT_STRCASENE(s1, s2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
-
-// Macros for comparing floating-point numbers.
-//
-//    * {ASSERT|EXPECT}_FLOAT_EQ(val1, val2):
-//         Tests that two float values are almost equal.
-//    * {ASSERT|EXPECT}_DOUBLE_EQ(val1, val2):
-//         Tests that two double values are almost equal.
-//    * {ASSERT|EXPECT}_NEAR(v1, v2, abs_error):
-//         Tests that v1 and v2 are within the given distance to each other.
-//
-// Google Test uses ULP-based comparison to automatically pick a default
-// error bound that is appropriate for the operands.  See the
-// FloatingPoint template class in gtest-internal.h if you are
-// interested in the implementation details.
-
-#define EXPECT_FLOAT_EQ(val1, val2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      val1, val2)
-
-#define EXPECT_DOUBLE_EQ(val1, val2)\
-  EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      val1, val2)
-
-#define ASSERT_FLOAT_EQ(val1, val2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
-                      val1, val2)
-
-#define ASSERT_DOUBLE_EQ(val1, val2)\
-  ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
-                      val1, val2)
-
-#define EXPECT_NEAR(val1, val2, abs_error)\
-  EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
-                      val1, val2, abs_error)
-
-#define ASSERT_NEAR(val1, val2, abs_error)\
-  ASSERT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
-                      val1, val2, abs_error)
-
-// These predicate format functions work on floating-point values, and
-// can be used in {ASSERT|EXPECT}_PRED_FORMAT2*(), e.g.
-//
-//   EXPECT_PRED_FORMAT2(testing::DoubleLE, Foo(), 5.0);
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-GTEST_API_ AssertionResult FloatLE(const char* expr1, const char* expr2,
-                                   float val1, float val2);
-GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
-                                    double val1, double val2);
-
-
-#if GTEST_OS_WINDOWS
-
-// Macros that test for HRESULT failure and success, these are only useful
-// on Windows, and rely on Windows SDK macros and APIs to compile.
-//
-//    * {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}(expr)
-//
-// When expr unexpectedly fails or succeeds, Google Test prints the
-// expected result and the actual result with both a human-readable
-// string representation of the error, if available, as well as the
-// hex result code.
-# define EXPECT_HRESULT_SUCCEEDED(expr) \
-    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
-
-# define ASSERT_HRESULT_SUCCEEDED(expr) \
-    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
-
-# define EXPECT_HRESULT_FAILED(expr) \
-    EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
-
-# define ASSERT_HRESULT_FAILED(expr) \
-    ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
-
-#endif  // GTEST_OS_WINDOWS
-
-// Macros that execute statement and check that it doesn't generate new fatal
-// failures in the current thread.
-//
-//   * {ASSERT|EXPECT}_NO_FATAL_FAILURE(statement);
-//
-// Examples:
-//
-//   EXPECT_NO_FATAL_FAILURE(Process());
-//   ASSERT_NO_FATAL_FAILURE(Process()) << "Process() failed";
-//
-#define ASSERT_NO_FATAL_FAILURE(statement) \
-    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_FATAL_FAILURE_)
-#define EXPECT_NO_FATAL_FAILURE(statement) \
-    GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_NONFATAL_FAILURE_)
-
-// Causes a trace (including the given source file path and line number,
-// and the given message) to be included in every test failure message generated
-// by code in the scope of the lifetime of an instance of this class. The effect
-// is undone with the destruction of the instance.
-//
-// The message argument can be anything streamable to std::ostream.
-//
-// Example:
-//   testing::ScopedTrace trace("file.cc", 123, "message");
-//
-class GTEST_API_ ScopedTrace {
- public:
-  // The c'tor pushes the given source file location and message onto
-  // a trace stack maintained by Google Test.
-
-  // Template version. Uses Message() to convert the values into strings.
-  // Slow, but flexible.
-  template <typename T>
-  ScopedTrace(const char* file, int line, const T& message) {
-    PushTrace(file, line, (Message() << message).GetString());
-  }
-
-  // Optimize for some known types.
-  ScopedTrace(const char* file, int line, const char* message) {
-    PushTrace(file, line, message ? message : "(null)");
-  }
-
-  ScopedTrace(const char* file, int line, const std::string& message) {
-    PushTrace(file, line, message);
-  }
-
-  // The d'tor pops the info pushed by the c'tor.
-  //
-  // Note that the d'tor is not virtual in order to be efficient.
-  // Don't inherit from ScopedTrace!
-  ~ScopedTrace();
-
- private:
-  void PushTrace(const char* file, int line, std::string message);
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedTrace);
-} GTEST_ATTRIBUTE_UNUSED_;  // A ScopedTrace object does its job in its
-                            // c'tor and d'tor.  Therefore it doesn't
-                            // need to be used otherwise.
-
-// Causes a trace (including the source file path, the current line
-// number, and the given message) to be included in every test failure
-// message generated by code in the current scope.  The effect is
-// undone when the control leaves the current scope.
-//
-// The message argument can be anything streamable to std::ostream.
-//
-// In the implementation, we include the current line number as part
-// of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
-// to appear in the same block - as long as they are on different
-// lines.
-//
-// Assuming that each thread maintains its own stack of traces.
-// Therefore, a SCOPED_TRACE() would (correctly) only affect the
-// assertions in its own thread.
-#define SCOPED_TRACE(message) \
-  ::testing::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
-    __FILE__, __LINE__, (message))
-
-// Compile-time assertion for type equality.
-// StaticAssertTypeEq<type1, type2>() compiles if and only if type1 and type2
-// are the same type.  The value it returns is not interesting.
-//
-// Instead of making StaticAssertTypeEq a class template, we make it a
-// function template that invokes a helper class template.  This
-// prevents a user from misusing StaticAssertTypeEq<T1, T2> by
-// defining objects of that type.
-//
-// CAVEAT:
-//
-// When used inside a method of a class template,
-// StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
-// instantiated.  For example, given:
-//
-//   template <typename T> class Foo {
-//    public:
-//     void Bar() { testing::StaticAssertTypeEq<int, T>(); }
-//   };
-//
-// the code:
-//
-//   void Test1() { Foo<bool> foo; }
-//
-// will NOT generate a compiler error, as Foo<bool>::Bar() is never
-// actually instantiated.  Instead, you need:
-//
-//   void Test2() { Foo<bool> foo; foo.Bar(); }
-//
-// to cause a compiler error.
-template <typename T1, typename T2>
-constexpr bool StaticAssertTypeEq() noexcept {
-  static_assert(std::is_same<T1, T2>::value,
-                "type1 and type2 are not the same type");
-  return true;
-}
-
-// Defines a test.
-//
-// The first parameter is the name of the test suite, and the second
-// parameter is the name of the test within the test suite.
-//
-// The convention is to end the test suite name with "Test".  For
-// example, a test suite for the Foo class can be named FooTest.
-//
-// Test code should appear between braces after an invocation of
-// this macro.  Example:
-//
-//   TEST(FooTest, InitializesCorrectly) {
-//     Foo foo;
-//     EXPECT_TRUE(foo.StatusIsOK());
-//   }
-
-// Note that we call GetTestTypeId() instead of GetTypeId<
-// ::testing::Test>() here to get the type ID of testing::Test.  This
-// is to work around a suspected linker bug when using Google Test as
-// a framework on Mac OS X.  The bug causes GetTypeId<
-// ::testing::Test>() to return different values depending on whether
-// the call is from the Google Test framework itself or from user test
-// code.  GetTestTypeId() is guaranteed to always return the same
-// value, as it always calls GetTypeId<>() from the Google Test
-// framework.
-#define GTEST_TEST(test_suite_name, test_name)             \
-  GTEST_TEST_(test_suite_name, test_name, ::testing::Test, \
-              ::testing::internal::GetTestTypeId())
-
-// Define this macro to 1 to omit the definition of TEST(), which
-// is a generic name and clashes with some other libraries.
-#if !GTEST_DONT_DEFINE_TEST
-#define TEST(test_suite_name, test_name) GTEST_TEST(test_suite_name, test_name)
-#endif
-
-// Defines a test that uses a test fixture.
-//
-// The first parameter is the name of the test fixture class, which
-// also doubles as the test suite name.  The second parameter is the
-// name of the test within the test suite.
-//
-// A test fixture class must be declared earlier.  The user should put
-// the test code between braces after using this macro.  Example:
-//
-//   class FooTest : public testing::Test {
-//    protected:
-//     void SetUp() override { b_.AddElement(3); }
-//
-//     Foo a_;
-//     Foo b_;
-//   };
-//
-//   TEST_F(FooTest, InitializesCorrectly) {
-//     EXPECT_TRUE(a_.StatusIsOK());
-//   }
-//
-//   TEST_F(FooTest, ReturnsElementCountCorrectly) {
-//     EXPECT_EQ(a_.size(), 0);
-//     EXPECT_EQ(b_.size(), 1);
-//   }
-//
-// GOOGLETEST_CM0011 DO NOT DELETE
-#define TEST_F(test_fixture, test_name)\
-  GTEST_TEST_(test_fixture, test_name, test_fixture, \
-              ::testing::internal::GetTypeId<test_fixture>())
-
-// Returns a path to temporary directory.
-// Tries to determine an appropriate directory for the platform.
-GTEST_API_ std::string TempDir();
-
-#ifdef _MSC_VER
-#  pragma warning(pop)
-#endif
-
-// Dynamically registers a test with the framework.
-//
-// This is an advanced API only to be used when the `TEST` macros are
-// insufficient. The macros should be preferred when possible, as they avoid
-// most of the complexity of calling this function.
-//
-// The `factory` argument is a factory callable (move-constructible) object or
-// function pointer that creates a new instance of the Test object. It
-// handles ownership to the caller. The signature of the callable is
-// `Fixture*()`, where `Fixture` is the test fixture class for the test. All
-// tests registered with the same `test_suite_name` must return the same
-// fixture type. This is checked at runtime.
-//
-// The framework will infer the fixture class from the factory and will call
-// the `SetUpTestSuite` and `TearDownTestSuite` for it.
-//
-// Must be called before `RUN_ALL_TESTS()` is invoked, otherwise behavior is
-// undefined.
-//
-// Use case example:
-//
-// class MyFixture : public ::testing::Test {
-//  public:
-//   // All of these optional, just like in regular macro usage.
-//   static void SetUpTestSuite() { ... }
-//   static void TearDownTestSuite() { ... }
-//   void SetUp() override { ... }
-//   void TearDown() override { ... }
-// };
-//
-// class MyTest : public MyFixture {
-//  public:
-//   explicit MyTest(int data) : data_(data) {}
-//   void TestBody() override { ... }
-//
-//  private:
-//   int data_;
-// };
-//
-// void RegisterMyTests(const std::vector<int>& values) {
-//   for (int v : values) {
-//     ::testing::RegisterTest(
-//         "MyFixture", ("Test" + std::to_string(v)).c_str(), nullptr,
-//         std::to_string(v).c_str(),
-//         __FILE__, __LINE__,
-//         // Important to use the fixture type as the return type here.
-//         [=]() -> MyFixture* { return new MyTest(v); });
-//   }
-// }
-// ...
-// int main(int argc, char** argv) {
-//   std::vector<int> values_to_test = LoadValuesFromConfig();
-//   RegisterMyTests(values_to_test);
-//   ...
-//   return RUN_ALL_TESTS();
-// }
-//
-template <int&... ExplicitParameterBarrier, typename Factory>
-TestInfo* RegisterTest(const char* test_suite_name, const char* test_name,
-                       const char* type_param, const char* value_param,
-                       const char* file, int line, Factory factory) {
-  using TestT = typename std::remove_pointer<decltype(factory())>::type;
-
-  class FactoryImpl : public internal::TestFactoryBase {
-   public:
-    explicit FactoryImpl(Factory f) : factory_(std::move(f)) {}
-    Test* CreateTest() override { return factory_(); }
-
-   private:
-    Factory factory_;
-  };
-
-  return internal::MakeAndRegisterTestInfo(
-      test_suite_name, test_name, type_param, value_param,
-      internal::CodeLocation(file, line), internal::GetTypeId<TestT>(),
-      internal::SuiteApiResolver<TestT>::GetSetUpCaseOrSuite(file, line),
-      internal::SuiteApiResolver<TestT>::GetTearDownCaseOrSuite(file, line),
-      new FactoryImpl{std::move(factory)});
-}
-
-}  // namespace testing
-
-// Use this function in main() to run all tests.  It returns 0 if all
-// tests are successful, or 1 otherwise.
-//
-// RUN_ALL_TESTS() should be invoked after the command line has been
-// parsed by InitGoogleTest().
-//
-// This function was formerly a macro; thus, it is in the global
-// namespace and has an all-caps name.
-int RUN_ALL_TESTS() GTEST_MUST_USE_RESULT_;
-
-inline int RUN_ALL_TESTS() {
-  return ::testing::UnitTest::GetInstance()->Run();
-}
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_H_
diff --git a/3rdparty/gtest/include/gtest/gtest_pred_impl.h b/3rdparty/gtest/include/gtest/gtest_pred_impl.h
deleted file mode 100644
index d514255c..00000000
--- a/3rdparty/gtest/include/gtest/gtest_pred_impl.h
+++ /dev/null
@@ -1,359 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on 01/02/2019 by command
-// 'gen_gtest_pred_impl.py 5'.  DO NOT EDIT BY HAND!
-//
-// Implements a family of generic predicate assertion macros.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-
-#include "gtest/gtest.h"
-
-namespace testing {
-
-// This header implements a family of generic predicate assertion
-// macros:
-//
-//   ASSERT_PRED_FORMAT1(pred_format, v1)
-//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
-//   ...
-//
-// where pred_format is a function or functor that takes n (in the
-// case of ASSERT_PRED_FORMATn) values and their source expression
-// text, and returns a testing::AssertionResult.  See the definition
-// of ASSERT_EQ in gtest.h for an example.
-//
-// If you don't care about formatting, you can use the more
-// restrictive version:
-//
-//   ASSERT_PRED1(pred, v1)
-//   ASSERT_PRED2(pred, v1, v2)
-//   ...
-//
-// where pred is an n-ary function or functor that returns bool,
-// and the values v1, v2, ..., must support the << operator for
-// streaming to std::ostream.
-//
-// We also define the EXPECT_* variations.
-//
-// For now we only support predicates whose arity is at most 5.
-// Please email googletestframework@googlegroups.com if you need
-// support for higher arities.
-
-// GTEST_ASSERT_ is the basic statement to which all of the assertions
-// in this file reduce.  Don't use this in your code.
-
-#define GTEST_ASSERT_(expression, on_failure) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (const ::testing::AssertionResult gtest_ar = (expression)) \
-    ; \
-  else \
-    on_failure(gtest_ar.failure_message())
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED1.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1>
-AssertionResult AssertPred1Helper(const char* pred_text,
-                                  const char* e1,
-                                  Pred pred,
-                                  const T1& v1) {
-  if (pred(v1)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT1.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT1_(pred_format, v1, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, v1), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED1.  Don't use
-// this in your code.
-#define GTEST_PRED1_(pred, v1, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred1Helper(#pred, \
-                                             #v1, \
-                                             pred, \
-                                             v1), on_failure)
-
-// Unary predicate assertion macros.
-#define EXPECT_PRED_FORMAT1(pred_format, v1) \
-  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED1(pred, v1) \
-  GTEST_PRED1_(pred, v1, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT1(pred_format, v1) \
-  GTEST_PRED_FORMAT1_(pred_format, v1, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED1(pred, v1) \
-  GTEST_PRED1_(pred, v1, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED2.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2>
-AssertionResult AssertPred2Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2) {
-  if (pred(v1, v2)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT2.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT2_(pred_format, v1, v2, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, v1, v2), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED2.  Don't use
-// this in your code.
-#define GTEST_PRED2_(pred, v1, v2, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred2Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             pred, \
-                                             v1, \
-                                             v2), on_failure)
-
-// Binary predicate assertion macros.
-#define EXPECT_PRED_FORMAT2(pred_format, v1, v2) \
-  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED2(pred, v1, v2) \
-  GTEST_PRED2_(pred, v1, v2, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT2(pred_format, v1, v2) \
-  GTEST_PRED_FORMAT2_(pred_format, v1, v2, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED2(pred, v1, v2) \
-  GTEST_PRED2_(pred, v1, v2, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED3.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3>
-AssertionResult AssertPred3Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3) {
-  if (pred(v1, v2, v3)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT3.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, v1, v2, v3), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED3.  Don't use
-// this in your code.
-#define GTEST_PRED3_(pred, v1, v2, v3, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred3Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3), on_failure)
-
-// Ternary predicate assertion macros.
-#define EXPECT_PRED_FORMAT3(pred_format, v1, v2, v3) \
-  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED3(pred, v1, v2, v3) \
-  GTEST_PRED3_(pred, v1, v2, v3, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT3(pred_format, v1, v2, v3) \
-  GTEST_PRED_FORMAT3_(pred_format, v1, v2, v3, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED3(pred, v1, v2, v3) \
-  GTEST_PRED3_(pred, v1, v2, v3, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED4.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3,
-          typename T4>
-AssertionResult AssertPred4Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  const char* e4,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3,
-                                  const T4& v4) {
-  if (pred(v1, v2, v3, v4)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
-         << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
-         << e4 << " evaluates to " << ::testing::PrintToString(v4);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT4.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, v1, v2, v3, v4), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED4.  Don't use
-// this in your code.
-#define GTEST_PRED4_(pred, v1, v2, v3, v4, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred4Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             #v4, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3, \
-                                             v4), on_failure)
-
-// 4-ary predicate assertion macros.
-#define EXPECT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
-  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED4(pred, v1, v2, v3, v4) \
-  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT4(pred_format, v1, v2, v3, v4) \
-  GTEST_PRED_FORMAT4_(pred_format, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED4(pred, v1, v2, v3, v4) \
-  GTEST_PRED4_(pred, v1, v2, v3, v4, GTEST_FATAL_FAILURE_)
-
-
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED5.  Don't use
-// this in your code.
-template <typename Pred,
-          typename T1,
-          typename T2,
-          typename T3,
-          typename T4,
-          typename T5>
-AssertionResult AssertPred5Helper(const char* pred_text,
-                                  const char* e1,
-                                  const char* e2,
-                                  const char* e3,
-                                  const char* e4,
-                                  const char* e5,
-                                  Pred pred,
-                                  const T1& v1,
-                                  const T2& v2,
-                                  const T3& v3,
-                                  const T4& v4,
-                                  const T5& v5) {
-  if (pred(v1, v2, v3, v4, v5)) return AssertionSuccess();
-
-  return AssertionFailure()
-         << pred_text << "(" << e1 << ", " << e2 << ", " << e3 << ", " << e4
-         << ", " << e5 << ") evaluates to false, where"
-         << "\n"
-         << e1 << " evaluates to " << ::testing::PrintToString(v1) << "\n"
-         << e2 << " evaluates to " << ::testing::PrintToString(v2) << "\n"
-         << e3 << " evaluates to " << ::testing::PrintToString(v3) << "\n"
-         << e4 << " evaluates to " << ::testing::PrintToString(v4) << "\n"
-         << e5 << " evaluates to " << ::testing::PrintToString(v5);
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT5.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, on_failure)\
-  GTEST_ASSERT_(pred_format(#v1, #v2, #v3, #v4, #v5, v1, v2, v3, v4, v5), \
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED5.  Don't use
-// this in your code.
-#define GTEST_PRED5_(pred, v1, v2, v3, v4, v5, on_failure)\
-  GTEST_ASSERT_(::testing::AssertPred5Helper(#pred, \
-                                             #v1, \
-                                             #v2, \
-                                             #v3, \
-                                             #v4, \
-                                             #v5, \
-                                             pred, \
-                                             v1, \
-                                             v2, \
-                                             v3, \
-                                             v4, \
-                                             v5), on_failure)
-
-// 5-ary predicate assertion macros.
-#define EXPECT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
-  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED5(pred, v1, v2, v3, v4, v5) \
-  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT5(pred_format, v1, v2, v3, v4, v5) \
-  GTEST_PRED_FORMAT5_(pred_format, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED5(pred, v1, v2, v3, v4, v5) \
-  GTEST_PRED5_(pred, v1, v2, v3, v4, v5, GTEST_FATAL_FAILURE_)
-
-
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
diff --git a/3rdparty/gtest/include/gtest/gtest_prod.h b/3rdparty/gtest/include/gtest/gtest_prod.h
deleted file mode 100644
index e651671e..00000000
--- a/3rdparty/gtest/include/gtest/gtest_prod.h
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Testing and Mocking Framework definitions useful in production code.
-// GOOGLETEST_CM0003 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PROD_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PROD_H_
-
-// When you need to test the private or protected members of a class,
-// use the FRIEND_TEST macro to declare your tests as friends of the
-// class.  For example:
-//
-// class MyClass {
-//  private:
-//   void PrivateMethod();
-//   FRIEND_TEST(MyClassTest, PrivateMethodWorks);
-// };
-//
-// class MyClassTest : public testing::Test {
-//   // ...
-// };
-//
-// TEST_F(MyClassTest, PrivateMethodWorks) {
-//   // Can call MyClass::PrivateMethod() here.
-// }
-//
-// Note: The test class must be in the same namespace as the class being tested.
-// For example, putting MyClassTest in an anonymous namespace will not work.
-
-#define FRIEND_TEST(test_case_name, test_name)\
-friend class test_case_name##_##test_name##_Test
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PROD_H_
diff --git a/3rdparty/gtest/include/gtest/internal/custom/README.md b/3rdparty/gtest/include/gtest/internal/custom/README.md
deleted file mode 100644
index ff391fb4..00000000
--- a/3rdparty/gtest/include/gtest/internal/custom/README.md
+++ /dev/null
@@ -1,56 +0,0 @@
-# Customization Points
-
-The custom directory is an injection point for custom user configurations.
-
-## Header `gtest.h`
-
-### The following macros can be defined:
-
-*   `GTEST_OS_STACK_TRACE_GETTER_` - The name of an implementation of
-    `OsStackTraceGetterInterface`.
-*   `GTEST_CUSTOM_TEMPDIR_FUNCTION_` - An override for `testing::TempDir()`. See
-    `testing::TempDir` for semantics and signature.
-
-## Header `gtest-port.h`
-
-The following macros can be defined:
-
-### Flag related macros:
-
-*   `GTEST_FLAG(flag_name)`
-*   `GTEST_USE_OWN_FLAGFILE_FLAG_` - Define to 0 when the system provides its
-    own flagfile flag parsing.
-*   `GTEST_DECLARE_bool_(name)`
-*   `GTEST_DECLARE_int32_(name)`
-*   `GTEST_DECLARE_string_(name)`
-*   `GTEST_DEFINE_bool_(name, default_val, doc)`
-*   `GTEST_DEFINE_int32_(name, default_val, doc)`
-*   `GTEST_DEFINE_string_(name, default_val, doc)`
-
-### Logging:
-
-*   `GTEST_LOG_(severity)`
-*   `GTEST_CHECK_(condition)`
-*   Functions `LogToStderr()` and `FlushInfoLog()` have to be provided too.
-
-### Threading:
-
-*   `GTEST_HAS_NOTIFICATION_` - Enabled if Notification is already provided.
-*   `GTEST_HAS_MUTEX_AND_THREAD_LOCAL_` - Enabled if `Mutex` and `ThreadLocal`
-    are already provided. Must also provide `GTEST_DECLARE_STATIC_MUTEX_(mutex)`
-    and `GTEST_DEFINE_STATIC_MUTEX_(mutex)`
-*   `GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)`
-*   `GTEST_LOCK_EXCLUDED_(locks)`
-
-### Underlying library support features
-
-*   `GTEST_HAS_CXXABI_H_`
-
-### Exporting API symbols:
-
-*   `GTEST_API_` - Specifier for exported symbols.
-
-## Header `gtest-printers.h`
-
-*   See documentation at `gtest/gtest-printers.h` for details on how to define a
-    custom printer.
diff --git a/3rdparty/gtest/include/gtest/internal/custom/gtest-port.h b/3rdparty/gtest/include/gtest/internal/custom/gtest-port.h
deleted file mode 100644
index cd85d956..00000000
--- a/3rdparty/gtest/include/gtest/internal/custom/gtest-port.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PORT_H_
diff --git a/3rdparty/gtest/include/gtest/internal/custom/gtest-printers.h b/3rdparty/gtest/include/gtest/internal/custom/gtest-printers.h
deleted file mode 100644
index eb4467ab..00000000
--- a/3rdparty/gtest/include/gtest/internal/custom/gtest-printers.h
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This file provides an injection point for custom printers in a local
-// installation of gTest.
-// It will be included from gtest-printers.h and the overrides in this file
-// will be visible to everyone.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_PRINTERS_H_
diff --git a/3rdparty/gtest/include/gtest/internal/custom/gtest.h b/3rdparty/gtest/include/gtest/internal/custom/gtest.h
deleted file mode 100644
index 4c8e07be..00000000
--- a/3rdparty/gtest/include/gtest/internal/custom/gtest.h
+++ /dev/null
@@ -1,37 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Injection point for custom user configurations. See README for details
-//
-// ** Custom implementation starts here **
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_CUSTOM_GTEST_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-death-test-internal.h b/3rdparty/gtest/include/gtest/internal/gtest-death-test-internal.h
deleted file mode 100644
index 68bd3530..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-death-test-internal.h
+++ /dev/null
@@ -1,304 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines internal utilities needed for implementing
-// death tests.  They are subject to change without notice.
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
-
-#include "gtest/gtest-matchers.h"
-#include "gtest/internal/gtest-internal.h"
-
-#include <stdio.h>
-#include <memory>
-
-namespace testing {
-namespace internal {
-
-GTEST_DECLARE_string_(internal_run_death_test);
-
-// Names of the flags (needed for parsing Google Test flags).
-const char kDeathTestStyleFlag[] = "death_test_style";
-const char kDeathTestUseFork[] = "death_test_use_fork";
-const char kInternalRunDeathTestFlag[] = "internal_run_death_test";
-
-#if GTEST_HAS_DEATH_TEST
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// DeathTest is a class that hides much of the complexity of the
-// GTEST_DEATH_TEST_ macro.  It is abstract; its static Create method
-// returns a concrete class that depends on the prevailing death test
-// style, as defined by the --gtest_death_test_style and/or
-// --gtest_internal_run_death_test flags.
-
-// In describing the results of death tests, these terms are used with
-// the corresponding definitions:
-//
-// exit status:  The integer exit information in the format specified
-//               by wait(2)
-// exit code:    The integer code passed to exit(3), _exit(2), or
-//               returned from main()
-class GTEST_API_ DeathTest {
- public:
-  // Create returns false if there was an error determining the
-  // appropriate action to take for the current death test; for example,
-  // if the gtest_death_test_style flag is set to an invalid value.
-  // The LastMessage method will return a more detailed message in that
-  // case.  Otherwise, the DeathTest pointer pointed to by the "test"
-  // argument is set.  If the death test should be skipped, the pointer
-  // is set to NULL; otherwise, it is set to the address of a new concrete
-  // DeathTest object that controls the execution of the current test.
-  static bool Create(const char* statement, Matcher<const std::string&> matcher,
-                     const char* file, int line, DeathTest** test);
-  DeathTest();
-  virtual ~DeathTest() { }
-
-  // A helper class that aborts a death test when it's deleted.
-  class ReturnSentinel {
-   public:
-    explicit ReturnSentinel(DeathTest* test) : test_(test) { }
-    ~ReturnSentinel() { test_->Abort(TEST_ENCOUNTERED_RETURN_STATEMENT); }
-   private:
-    DeathTest* const test_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ReturnSentinel);
-  } GTEST_ATTRIBUTE_UNUSED_;
-
-  // An enumeration of possible roles that may be taken when a death
-  // test is encountered.  EXECUTE means that the death test logic should
-  // be executed immediately.  OVERSEE means that the program should prepare
-  // the appropriate environment for a child process to execute the death
-  // test, then wait for it to complete.
-  enum TestRole { OVERSEE_TEST, EXECUTE_TEST };
-
-  // An enumeration of the three reasons that a test might be aborted.
-  enum AbortReason {
-    TEST_ENCOUNTERED_RETURN_STATEMENT,
-    TEST_THREW_EXCEPTION,
-    TEST_DID_NOT_DIE
-  };
-
-  // Assumes one of the above roles.
-  virtual TestRole AssumeRole() = 0;
-
-  // Waits for the death test to finish and returns its status.
-  virtual int Wait() = 0;
-
-  // Returns true if the death test passed; that is, the test process
-  // exited during the test, its exit status matches a user-supplied
-  // predicate, and its stderr output matches a user-supplied regular
-  // expression.
-  // The user-supplied predicate may be a macro expression rather
-  // than a function pointer or functor, or else Wait and Passed could
-  // be combined.
-  virtual bool Passed(bool exit_status_ok) = 0;
-
-  // Signals that the death test did not die as expected.
-  virtual void Abort(AbortReason reason) = 0;
-
-  // Returns a human-readable outcome message regarding the outcome of
-  // the last death test.
-  static const char* LastMessage();
-
-  static void set_last_death_test_message(const std::string& message);
-
- private:
-  // A string containing a description of the outcome of the last death test.
-  static std::string last_death_test_message_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DeathTest);
-};
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Factory interface for death tests.  May be mocked out for testing.
-class DeathTestFactory {
- public:
-  virtual ~DeathTestFactory() { }
-  virtual bool Create(const char* statement,
-                      Matcher<const std::string&> matcher, const char* file,
-                      int line, DeathTest** test) = 0;
-};
-
-// A concrete DeathTestFactory implementation for normal use.
-class DefaultDeathTestFactory : public DeathTestFactory {
- public:
-  bool Create(const char* statement, Matcher<const std::string&> matcher,
-              const char* file, int line, DeathTest** test) override;
-};
-
-// Returns true if exit_status describes a process that was terminated
-// by a signal, or exited normally with a nonzero exit code.
-GTEST_API_ bool ExitedUnsuccessfully(int exit_status);
-
-// A string passed to EXPECT_DEATH (etc.) is caught by one of these overloads
-// and interpreted as a regex (rather than an Eq matcher) for legacy
-// compatibility.
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    ::testing::internal::RE regex) {
-  return ContainsRegex(regex.pattern());
-}
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(const char* regex) {
-  return ContainsRegex(regex);
-}
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    const ::std::string& regex) {
-  return ContainsRegex(regex);
-}
-
-// If a Matcher<const ::std::string&> is passed to EXPECT_DEATH (etc.), it's
-// used directly.
-inline Matcher<const ::std::string&> MakeDeathTestMatcher(
-    Matcher<const ::std::string&> matcher) {
-  return matcher;
-}
-
-// Traps C++ exceptions escaping statement and reports them as test
-// failures. Note that trapping SEH exceptions is not implemented here.
-# if GTEST_HAS_EXCEPTIONS
-#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
-  try { \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-  } catch (const ::std::exception& gtest_exception) { \
-    fprintf(\
-        stderr, \
-        "\n%s: Caught std::exception-derived exception escaping the " \
-        "death test statement. Exception message: %s\n", \
-        ::testing::internal::FormatFileLocation(__FILE__, __LINE__).c_str(), \
-        gtest_exception.what()); \
-    fflush(stderr); \
-    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
-  } catch (...) { \
-    death_test->Abort(::testing::internal::DeathTest::TEST_THREW_EXCEPTION); \
-  }
-
-# else
-#  define GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, death_test) \
-  GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement)
-
-# endif
-
-// This macro is for implementing ASSERT_DEATH*, EXPECT_DEATH*,
-// ASSERT_EXIT*, and EXPECT_EXIT*.
-#define GTEST_DEATH_TEST_(statement, predicate, regex_or_matcher, fail)        \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                                \
-  if (::testing::internal::AlwaysTrue()) {                                     \
-    ::testing::internal::DeathTest* gtest_dt;                                  \
-    if (!::testing::internal::DeathTest::Create(                               \
-            #statement,                                                        \
-            ::testing::internal::MakeDeathTestMatcher(regex_or_matcher),       \
-            __FILE__, __LINE__, &gtest_dt)) {                                  \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                        \
-    }                                                                          \
-    if (gtest_dt != nullptr) {                                                 \
-      std::unique_ptr< ::testing::internal::DeathTest> gtest_dt_ptr(gtest_dt); \
-      switch (gtest_dt->AssumeRole()) {                                        \
-        case ::testing::internal::DeathTest::OVERSEE_TEST:                     \
-          if (!gtest_dt->Passed(predicate(gtest_dt->Wait()))) {                \
-            goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                  \
-          }                                                                    \
-          break;                                                               \
-        case ::testing::internal::DeathTest::EXECUTE_TEST: {                   \
-          ::testing::internal::DeathTest::ReturnSentinel gtest_sentinel(       \
-              gtest_dt);                                                       \
-          GTEST_EXECUTE_DEATH_TEST_STATEMENT_(statement, gtest_dt);            \
-          gtest_dt->Abort(::testing::internal::DeathTest::TEST_DID_NOT_DIE);   \
-          break;                                                               \
-        }                                                                      \
-        default:                                                               \
-          break;                                                               \
-      }                                                                        \
-    }                                                                          \
-  } else                                                                       \
-    GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__)                                \
-        : fail(::testing::internal::DeathTest::LastMessage())
-// The symbol "fail" here expands to something into which a message
-// can be streamed.
-
-// This macro is for implementing ASSERT/EXPECT_DEBUG_DEATH when compiled in
-// NDEBUG mode. In this case we need the statements to be executed and the macro
-// must accept a streamed message even though the message is never printed.
-// The regex object is not evaluated, but it is used to prevent "unused"
-// warnings and to avoid an expression that doesn't compile in debug mode.
-#define GTEST_EXECUTE_STATEMENT_(statement, regex_or_matcher)    \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_                                  \
-  if (::testing::internal::AlwaysTrue()) {                       \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement);   \
-  } else if (!::testing::internal::AlwaysTrue()) {               \
-    ::testing::internal::MakeDeathTestMatcher(regex_or_matcher); \
-  } else                                                         \
-    ::testing::Message()
-
-// A class representing the parsed contents of the
-// --gtest_internal_run_death_test flag, as it existed when
-// RUN_ALL_TESTS was called.
-class InternalRunDeathTestFlag {
- public:
-  InternalRunDeathTestFlag(const std::string& a_file,
-                           int a_line,
-                           int an_index,
-                           int a_write_fd)
-      : file_(a_file), line_(a_line), index_(an_index),
-        write_fd_(a_write_fd) {}
-
-  ~InternalRunDeathTestFlag() {
-    if (write_fd_ >= 0)
-      posix::Close(write_fd_);
-  }
-
-  const std::string& file() const { return file_; }
-  int line() const { return line_; }
-  int index() const { return index_; }
-  int write_fd() const { return write_fd_; }
-
- private:
-  std::string file_;
-  int line_;
-  int index_;
-  int write_fd_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(InternalRunDeathTestFlag);
-};
-
-// Returns a newly created InternalRunDeathTestFlag object with fields
-// initialized from the GTEST_FLAG(internal_run_death_test) flag if
-// the flag is specified; otherwise returns NULL.
-InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag();
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_DEATH_TEST_INTERNAL_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-filepath.h b/3rdparty/gtest/include/gtest/internal/gtest-filepath.h
deleted file mode 100644
index c11b1015..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-filepath.h
+++ /dev/null
@@ -1,211 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test filepath utilities
-//
-// This header file declares classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included in gtest/internal/gtest-internal.h.
-// Do not include this header file separately!
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
-
-#include "gtest/internal/gtest-string.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-namespace internal {
-
-// FilePath - a class for file and directory pathname manipulation which
-// handles platform-specific conventions (like the pathname separator).
-// Used for helper functions for naming files in a directory for xml output.
-// Except for Set methods, all methods are const or static, which provides an
-// "immutable value object" -- useful for peace of mind.
-// A FilePath with a value ending in a path separator ("like/this/") represents
-// a directory, otherwise it is assumed to represent a file. In either case,
-// it may or may not represent an actual file or directory in the file system.
-// Names are NOT checked for syntax correctness -- no checking for illegal
-// characters, malformed paths, etc.
-
-class GTEST_API_ FilePath {
- public:
-  FilePath() : pathname_("") { }
-  FilePath(const FilePath& rhs) : pathname_(rhs.pathname_) { }
-
-  explicit FilePath(const std::string& pathname) : pathname_(pathname) {
-    Normalize();
-  }
-
-  FilePath& operator=(const FilePath& rhs) {
-    Set(rhs);
-    return *this;
-  }
-
-  void Set(const FilePath& rhs) {
-    pathname_ = rhs.pathname_;
-  }
-
-  const std::string& string() const { return pathname_; }
-  const char* c_str() const { return pathname_.c_str(); }
-
-  // Returns the current working directory, or "" if unsuccessful.
-  static FilePath GetCurrentDir();
-
-  // Given directory = "dir", base_name = "test", number = 0,
-  // extension = "xml", returns "dir/test.xml". If number is greater
-  // than zero (e.g., 12), returns "dir/test_12.xml".
-  // On Windows platform, uses \ as the separator rather than /.
-  static FilePath MakeFileName(const FilePath& directory,
-                               const FilePath& base_name,
-                               int number,
-                               const char* extension);
-
-  // Given directory = "dir", relative_path = "test.xml",
-  // returns "dir/test.xml".
-  // On Windows, uses \ as the separator rather than /.
-  static FilePath ConcatPaths(const FilePath& directory,
-                              const FilePath& relative_path);
-
-  // Returns a pathname for a file that does not currently exist. The pathname
-  // will be directory/base_name.extension or
-  // directory/base_name_<number>.extension if directory/base_name.extension
-  // already exists. The number will be incremented until a pathname is found
-  // that does not already exist.
-  // Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
-  // There could be a race condition if two or more processes are calling this
-  // function at the same time -- they could both pick the same filename.
-  static FilePath GenerateUniqueFileName(const FilePath& directory,
-                                         const FilePath& base_name,
-                                         const char* extension);
-
-  // Returns true if and only if the path is "".
-  bool IsEmpty() const { return pathname_.empty(); }
-
-  // If input name has a trailing separator character, removes it and returns
-  // the name, otherwise return the name string unmodified.
-  // On Windows platform, uses \ as the separator, other platforms use /.
-  FilePath RemoveTrailingPathSeparator() const;
-
-  // Returns a copy of the FilePath with the directory part removed.
-  // Example: FilePath("path/to/file").RemoveDirectoryName() returns
-  // FilePath("file"). If there is no directory part ("just_a_file"), it returns
-  // the FilePath unmodified. If there is no file part ("just_a_dir/") it
-  // returns an empty FilePath ("").
-  // On Windows platform, '\' is the path separator, otherwise it is '/'.
-  FilePath RemoveDirectoryName() const;
-
-  // RemoveFileName returns the directory path with the filename removed.
-  // Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
-  // If the FilePath is "a_file" or "/a_file", RemoveFileName returns
-  // FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
-  // not have a file, like "just/a/dir/", it returns the FilePath unmodified.
-  // On Windows platform, '\' is the path separator, otherwise it is '/'.
-  FilePath RemoveFileName() const;
-
-  // Returns a copy of the FilePath with the case-insensitive extension removed.
-  // Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
-  // FilePath("dir/file"). If a case-insensitive extension is not
-  // found, returns a copy of the original FilePath.
-  FilePath RemoveExtension(const char* extension) const;
-
-  // Creates directories so that path exists. Returns true if successful or if
-  // the directories already exist; returns false if unable to create
-  // directories for any reason. Will also return false if the FilePath does
-  // not represent a directory (that is, it doesn't end with a path separator).
-  bool CreateDirectoriesRecursively() const;
-
-  // Create the directory so that path exists. Returns true if successful or
-  // if the directory already exists; returns false if unable to create the
-  // directory for any reason, including if the parent directory does not
-  // exist. Not named "CreateDirectory" because that's a macro on Windows.
-  bool CreateFolder() const;
-
-  // Returns true if FilePath describes something in the file-system,
-  // either a file, directory, or whatever, and that something exists.
-  bool FileOrDirectoryExists() const;
-
-  // Returns true if pathname describes a directory in the file-system
-  // that exists.
-  bool DirectoryExists() const;
-
-  // Returns true if FilePath ends with a path separator, which indicates that
-  // it is intended to represent a directory. Returns false otherwise.
-  // This does NOT check that a directory (or file) actually exists.
-  bool IsDirectory() const;
-
-  // Returns true if pathname describes a root directory. (Windows has one
-  // root directory per disk drive.)
-  bool IsRootDirectory() const;
-
-  // Returns true if pathname describes an absolute path.
-  bool IsAbsolutePath() const;
-
- private:
-  // Replaces multiple consecutive separators with a single separator.
-  // For example, "bar///foo" becomes "bar/foo". Does not eliminate other
-  // redundancies that might be in a pathname involving "." or "..".
-  //
-  // A pathname with multiple consecutive separators may occur either through
-  // user error or as a result of some scripts or APIs that generate a pathname
-  // with a trailing separator. On other platforms the same API or script
-  // may NOT generate a pathname with a trailing "/". Then elsewhere that
-  // pathname may have another "/" and pathname components added to it,
-  // without checking for the separator already being there.
-  // The script language and operating system may allow paths like "foo//bar"
-  // but some of the functions in FilePath will not handle that correctly. In
-  // particular, RemoveTrailingPathSeparator() only removes one separator, and
-  // it is called in CreateDirectoriesRecursively() assuming that it will change
-  // a pathname from directory syntax (trailing separator) to filename syntax.
-  //
-  // On Windows this method also replaces the alternate path separator '/' with
-  // the primary path separator '\\', so that for example "bar\\/\\foo" becomes
-  // "bar\\foo".
-
-  void Normalize();
-
-  // Returns a pointer to the last occurence of a valid path separator in
-  // the FilePath. On Windows, for example, both '/' and '\' are valid path
-  // separators. Returns NULL if no path separator was found.
-  const char* FindLastPathSeparator() const;
-
-  std::string pathname_;
-};  // class FilePath
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_FILEPATH_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-internal.h b/3rdparty/gtest/include/gtest/internal/gtest-internal.h
deleted file mode 100644
index 94c816a2..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-internal.h
+++ /dev/null
@@ -1,1380 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file declares functions and macros used internally by
-// Google Test.  They are subject to change without notice.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_OS_LINUX
-# include <stdlib.h>
-# include <sys/types.h>
-# include <sys/wait.h>
-# include <unistd.h>
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>
-#endif
-
-#include <ctype.h>
-#include <float.h>
-#include <string.h>
-#include <iomanip>
-#include <limits>
-#include <map>
-#include <set>
-#include <string>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-filepath.h"
-#include "gtest/internal/gtest-string.h"
-#include "gtest/internal/gtest-type-util.h"
-
-// Due to C++ preprocessor weirdness, we need double indirection to
-// concatenate two tokens when one of them is __LINE__.  Writing
-//
-//   foo ## __LINE__
-//
-// will result in the token foo__LINE__, instead of foo followed by
-// the current line number.  For more details, see
-// http://www.parashift.com/c++-faq-lite/misc-technical-issues.html#faq-39.6
-#define GTEST_CONCAT_TOKEN_(foo, bar) GTEST_CONCAT_TOKEN_IMPL_(foo, bar)
-#define GTEST_CONCAT_TOKEN_IMPL_(foo, bar) foo ## bar
-
-// Stringifies its argument.
-#define GTEST_STRINGIFY_(name) #name
-
-namespace proto2 { class Message; }
-
-namespace testing {
-
-// Forward declarations.
-
-class AssertionResult;                 // Result of an assertion.
-class Message;                         // Represents a failure message.
-class Test;                            // Represents a test.
-class TestInfo;                        // Information about a test.
-class TestPartResult;                  // Result of a test part.
-class UnitTest;                        // A collection of test suites.
-
-template <typename T>
-::std::string PrintToString(const T& value);
-
-namespace internal {
-
-struct TraceInfo;                      // Information about a trace point.
-class TestInfoImpl;                    // Opaque implementation of TestInfo
-class UnitTestImpl;                    // Opaque implementation of UnitTest
-
-// The text used in failure messages to indicate the start of the
-// stack trace.
-GTEST_API_ extern const char kStackTraceMarker[];
-
-// An IgnoredValue object can be implicitly constructed from ANY value.
-class IgnoredValue {
-  struct Sink {};
- public:
-  // This constructor template allows any value to be implicitly
-  // converted to IgnoredValue.  The object has no data member and
-  // doesn't try to remember anything about the argument.  We
-  // deliberately omit the 'explicit' keyword in order to allow the
-  // conversion to be implicit.
-  // Disable the conversion if T already has a magical conversion operator.
-  // Otherwise we get ambiguity.
-  template <typename T,
-            typename std::enable_if<!std::is_convertible<T, Sink>::value,
-                                    int>::type = 0>
-  IgnoredValue(const T& /* ignored */) {}  // NOLINT(runtime/explicit)
-};
-
-// Appends the user-supplied message to the Google-Test-generated message.
-GTEST_API_ std::string AppendUserMessage(
-    const std::string& gtest_msg, const Message& user_msg);
-
-#if GTEST_HAS_EXCEPTIONS
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4275 \
-/* an exported class was derived from a class that was not exported */)
-
-// This exception is thrown by (and only by) a failed Google Test
-// assertion when GTEST_FLAG(throw_on_failure) is true (if exceptions
-// are enabled).  We derive it from std::runtime_error, which is for
-// errors presumably detectable only at run time.  Since
-// std::runtime_error inherits from std::exception, many testing
-// frameworks know how to extract and print the message inside it.
-class GTEST_API_ GoogleTestFailureException : public ::std::runtime_error {
- public:
-  explicit GoogleTestFailureException(const TestPartResult& failure);
-};
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4275
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-namespace edit_distance {
-// Returns the optimal edits to go from 'left' to 'right'.
-// All edits cost the same, with replace having lower priority than
-// add/remove.
-// Simple implementation of the Wagner-Fischer algorithm.
-// See http://en.wikipedia.org/wiki/Wagner-Fischer_algorithm
-enum EditType { kMatch, kAdd, kRemove, kReplace };
-GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<size_t>& left, const std::vector<size_t>& right);
-
-// Same as above, but the input is represented as strings.
-GTEST_API_ std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<std::string>& left,
-    const std::vector<std::string>& right);
-
-// Create a diff of the input strings in Unified diff format.
-GTEST_API_ std::string CreateUnifiedDiff(const std::vector<std::string>& left,
-                                         const std::vector<std::string>& right,
-                                         size_t context = 2);
-
-}  // namespace edit_distance
-
-// Calculate the diff between 'left' and 'right' and return it in unified diff
-// format.
-// If not null, stores in 'total_line_count' the total number of lines found
-// in left + right.
-GTEST_API_ std::string DiffStrings(const std::string& left,
-                                   const std::string& right,
-                                   size_t* total_line_count);
-
-// Constructs and returns the message for an equality assertion
-// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
-//
-// The first four parameters are the expressions used in the assertion
-// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
-// where foo is 5 and bar is 6, we have:
-//
-//   expected_expression: "foo"
-//   actual_expression:   "bar"
-//   expected_value:      "5"
-//   actual_value:        "6"
-//
-// The ignoring_case parameter is true if and only if the assertion is a
-// *_STRCASEEQ*.  When it's true, the string " (ignoring case)" will
-// be inserted into the message.
-GTEST_API_ AssertionResult EqFailure(const char* expected_expression,
-                                     const char* actual_expression,
-                                     const std::string& expected_value,
-                                     const std::string& actual_value,
-                                     bool ignoring_case);
-
-// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
-GTEST_API_ std::string GetBoolAssertionFailureMessage(
-    const AssertionResult& assertion_result,
-    const char* expression_text,
-    const char* actual_predicate_value,
-    const char* expected_predicate_value);
-
-// This template class represents an IEEE floating-point number
-// (either single-precision or double-precision, depending on the
-// template parameters).
-//
-// The purpose of this class is to do more sophisticated number
-// comparison.  (Due to round-off error, etc, it's very unlikely that
-// two floating-points will be equal exactly.  Hence a naive
-// comparison by the == operation often doesn't work.)
-//
-// Format of IEEE floating-point:
-//
-//   The most-significant bit being the leftmost, an IEEE
-//   floating-point looks like
-//
-//     sign_bit exponent_bits fraction_bits
-//
-//   Here, sign_bit is a single bit that designates the sign of the
-//   number.
-//
-//   For float, there are 8 exponent bits and 23 fraction bits.
-//
-//   For double, there are 11 exponent bits and 52 fraction bits.
-//
-//   More details can be found at
-//   http://en.wikipedia.org/wiki/IEEE_floating-point_standard.
-//
-// Template parameter:
-//
-//   RawType: the raw floating-point type (either float or double)
-template <typename RawType>
-class FloatingPoint {
- public:
-  // Defines the unsigned integer type that has the same size as the
-  // floating point number.
-  typedef typename TypeWithSize<sizeof(RawType)>::UInt Bits;
-
-  // Constants.
-
-  // # of bits in a number.
-  static const size_t kBitCount = 8*sizeof(RawType);
-
-  // # of fraction bits in a number.
-  static const size_t kFractionBitCount =
-    std::numeric_limits<RawType>::digits - 1;
-
-  // # of exponent bits in a number.
-  static const size_t kExponentBitCount = kBitCount - 1 - kFractionBitCount;
-
-  // The mask for the sign bit.
-  static const Bits kSignBitMask = static_cast<Bits>(1) << (kBitCount - 1);
-
-  // The mask for the fraction bits.
-  static const Bits kFractionBitMask =
-    ~static_cast<Bits>(0) >> (kExponentBitCount + 1);
-
-  // The mask for the exponent bits.
-  static const Bits kExponentBitMask = ~(kSignBitMask | kFractionBitMask);
-
-  // How many ULP's (Units in the Last Place) we want to tolerate when
-  // comparing two numbers.  The larger the value, the more error we
-  // allow.  A 0 value means that two numbers must be exactly the same
-  // to be considered equal.
-  //
-  // The maximum error of a single floating-point operation is 0.5
-  // units in the last place.  On Intel CPU's, all floating-point
-  // calculations are done with 80-bit precision, while double has 64
-  // bits.  Therefore, 4 should be enough for ordinary use.
-  //
-  // See the following article for more details on ULP:
-  // http://randomascii.wordpress.com/2012/02/25/comparing-floating-point-numbers-2012-edition/
-  static const size_t kMaxUlps = 4;
-
-  // Constructs a FloatingPoint from a raw floating-point number.
-  //
-  // On an Intel CPU, passing a non-normalized NAN (Not a Number)
-  // around may change its bits, although the new value is guaranteed
-  // to be also a NAN.  Therefore, don't expect this constructor to
-  // preserve the bits in x when x is a NAN.
-  explicit FloatingPoint(const RawType& x) { u_.value_ = x; }
-
-  // Static methods
-
-  // Reinterprets a bit pattern as a floating-point number.
-  //
-  // This function is needed to test the AlmostEquals() method.
-  static RawType ReinterpretBits(const Bits bits) {
-    FloatingPoint fp(0);
-    fp.u_.bits_ = bits;
-    return fp.u_.value_;
-  }
-
-  // Returns the floating-point number that represent positive infinity.
-  static RawType Infinity() {
-    return ReinterpretBits(kExponentBitMask);
-  }
-
-  // Returns the maximum representable finite floating-point number.
-  static RawType Max();
-
-  // Non-static methods
-
-  // Returns the bits that represents this number.
-  const Bits &bits() const { return u_.bits_; }
-
-  // Returns the exponent bits of this number.
-  Bits exponent_bits() const { return kExponentBitMask & u_.bits_; }
-
-  // Returns the fraction bits of this number.
-  Bits fraction_bits() const { return kFractionBitMask & u_.bits_; }
-
-  // Returns the sign bit of this number.
-  Bits sign_bit() const { return kSignBitMask & u_.bits_; }
-
-  // Returns true if and only if this is NAN (not a number).
-  bool is_nan() const {
-    // It's a NAN if the exponent bits are all ones and the fraction
-    // bits are not entirely zeros.
-    return (exponent_bits() == kExponentBitMask) && (fraction_bits() != 0);
-  }
-
-  // Returns true if and only if this number is at most kMaxUlps ULP's away
-  // from rhs.  In particular, this function:
-  //
-  //   - returns false if either number is (or both are) NAN.
-  //   - treats really large numbers as almost equal to infinity.
-  //   - thinks +0.0 and -0.0 are 0 DLP's apart.
-  bool AlmostEquals(const FloatingPoint& rhs) const {
-    // The IEEE standard says that any comparison operation involving
-    // a NAN must return false.
-    if (is_nan() || rhs.is_nan()) return false;
-
-    return DistanceBetweenSignAndMagnitudeNumbers(u_.bits_, rhs.u_.bits_)
-        <= kMaxUlps;
-  }
-
- private:
-  // The data type used to store the actual floating-point number.
-  union FloatingPointUnion {
-    RawType value_;  // The raw floating-point number.
-    Bits bits_;      // The bits that represent the number.
-  };
-
-  // Converts an integer from the sign-and-magnitude representation to
-  // the biased representation.  More precisely, let N be 2 to the
-  // power of (kBitCount - 1), an integer x is represented by the
-  // unsigned number x + N.
-  //
-  // For instance,
-  //
-  //   -N + 1 (the most negative number representable using
-  //          sign-and-magnitude) is represented by 1;
-  //   0      is represented by N; and
-  //   N - 1  (the biggest number representable using
-  //          sign-and-magnitude) is represented by 2N - 1.
-  //
-  // Read http://en.wikipedia.org/wiki/Signed_number_representations
-  // for more details on signed number representations.
-  static Bits SignAndMagnitudeToBiased(const Bits &sam) {
-    if (kSignBitMask & sam) {
-      // sam represents a negative number.
-      return ~sam + 1;
-    } else {
-      // sam represents a positive number.
-      return kSignBitMask | sam;
-    }
-  }
-
-  // Given two numbers in the sign-and-magnitude representation,
-  // returns the distance between them as an unsigned number.
-  static Bits DistanceBetweenSignAndMagnitudeNumbers(const Bits &sam1,
-                                                     const Bits &sam2) {
-    const Bits biased1 = SignAndMagnitudeToBiased(sam1);
-    const Bits biased2 = SignAndMagnitudeToBiased(sam2);
-    return (biased1 >= biased2) ? (biased1 - biased2) : (biased2 - biased1);
-  }
-
-  FloatingPointUnion u_;
-};
-
-// We cannot use std::numeric_limits<T>::max() as it clashes with the max()
-// macro defined by <windows.h>.
-template <>
-inline float FloatingPoint<float>::Max() { return FLT_MAX; }
-template <>
-inline double FloatingPoint<double>::Max() { return DBL_MAX; }
-
-// Typedefs the instances of the FloatingPoint template class that we
-// care to use.
-typedef FloatingPoint<float> Float;
-typedef FloatingPoint<double> Double;
-
-// In order to catch the mistake of putting tests that use different
-// test fixture classes in the same test suite, we need to assign
-// unique IDs to fixture classes and compare them.  The TypeId type is
-// used to hold such IDs.  The user should treat TypeId as an opaque
-// type: the only operation allowed on TypeId values is to compare
-// them for equality using the == operator.
-typedef const void* TypeId;
-
-template <typename T>
-class TypeIdHelper {
- public:
-  // dummy_ must not have a const type.  Otherwise an overly eager
-  // compiler (e.g. MSVC 7.1 & 8.0) may try to merge
-  // TypeIdHelper<T>::dummy_ for different Ts as an "optimization".
-  static bool dummy_;
-};
-
-template <typename T>
-bool TypeIdHelper<T>::dummy_ = false;
-
-// GetTypeId<T>() returns the ID of type T.  Different values will be
-// returned for different types.  Calling the function twice with the
-// same type argument is guaranteed to return the same ID.
-template <typename T>
-TypeId GetTypeId() {
-  // The compiler is required to allocate a different
-  // TypeIdHelper<T>::dummy_ variable for each T used to instantiate
-  // the template.  Therefore, the address of dummy_ is guaranteed to
-  // be unique.
-  return &(TypeIdHelper<T>::dummy_);
-}
-
-// Returns the type ID of ::testing::Test.  Always call this instead
-// of GetTypeId< ::testing::Test>() to get the type ID of
-// ::testing::Test, as the latter may give the wrong result due to a
-// suspected linker bug when compiling Google Test as a Mac OS X
-// framework.
-GTEST_API_ TypeId GetTestTypeId();
-
-// Defines the abstract factory interface that creates instances
-// of a Test object.
-class TestFactoryBase {
- public:
-  virtual ~TestFactoryBase() {}
-
-  // Creates a test instance to run. The instance is both created and destroyed
-  // within TestInfoImpl::Run()
-  virtual Test* CreateTest() = 0;
-
- protected:
-  TestFactoryBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestFactoryBase);
-};
-
-// This class provides implementation of TeastFactoryBase interface.
-// It is used in TEST and TEST_F macros.
-template <class TestClass>
-class TestFactoryImpl : public TestFactoryBase {
- public:
-  Test* CreateTest() override { return new TestClass; }
-};
-
-#if GTEST_OS_WINDOWS
-
-// Predicate-formatters for implementing the HRESULT checking macros
-// {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}
-// We pass a long instead of HRESULT to avoid causing an
-// include dependency for the HRESULT type.
-GTEST_API_ AssertionResult IsHRESULTSuccess(const char* expr,
-                                            long hr);  // NOLINT
-GTEST_API_ AssertionResult IsHRESULTFailure(const char* expr,
-                                            long hr);  // NOLINT
-
-#endif  // GTEST_OS_WINDOWS
-
-// Types of SetUpTestSuite() and TearDownTestSuite() functions.
-using SetUpTestSuiteFunc = void (*)();
-using TearDownTestSuiteFunc = void (*)();
-
-struct CodeLocation {
-  CodeLocation(const std::string& a_file, int a_line)
-      : file(a_file), line(a_line) {}
-
-  std::string file;
-  int line;
-};
-
-//  Helper to identify which setup function for TestCase / TestSuite to call.
-//  Only one function is allowed, either TestCase or TestSute but not both.
-
-// Utility functions to help SuiteApiResolver
-using SetUpTearDownSuiteFuncType = void (*)();
-
-inline SetUpTearDownSuiteFuncType GetNotDefaultOrNull(
-    SetUpTearDownSuiteFuncType a, SetUpTearDownSuiteFuncType def) {
-  return a == def ? nullptr : a;
-}
-
-template <typename T>
-//  Note that SuiteApiResolver inherits from T because
-//  SetUpTestSuite()/TearDownTestSuite() could be protected. Ths way
-//  SuiteApiResolver can access them.
-struct SuiteApiResolver : T {
-  // testing::Test is only forward declared at this point. So we make it a
-  // dependend class for the compiler to be OK with it.
-  using Test =
-      typename std::conditional<sizeof(T) != 0, ::testing::Test, void>::type;
-
-  static SetUpTearDownSuiteFuncType GetSetUpCaseOrSuite(const char* filename,
-                                                        int line_num) {
-    SetUpTearDownSuiteFuncType test_case_fp =
-        GetNotDefaultOrNull(&T::SetUpTestCase, &Test::SetUpTestCase);
-    SetUpTearDownSuiteFuncType test_suite_fp =
-        GetNotDefaultOrNull(&T::SetUpTestSuite, &Test::SetUpTestSuite);
-
-    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
-        << "Test can not provide both SetUpTestSuite and SetUpTestCase, please "
-           "make sure there is only one present at "
-        << filename << ":" << line_num;
-
-    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
-  }
-
-  static SetUpTearDownSuiteFuncType GetTearDownCaseOrSuite(const char* filename,
-                                                           int line_num) {
-    SetUpTearDownSuiteFuncType test_case_fp =
-        GetNotDefaultOrNull(&T::TearDownTestCase, &Test::TearDownTestCase);
-    SetUpTearDownSuiteFuncType test_suite_fp =
-        GetNotDefaultOrNull(&T::TearDownTestSuite, &Test::TearDownTestSuite);
-
-    GTEST_CHECK_(!test_case_fp || !test_suite_fp)
-        << "Test can not provide both TearDownTestSuite and TearDownTestCase,"
-           " please make sure there is only one present at"
-        << filename << ":" << line_num;
-
-    return test_case_fp != nullptr ? test_case_fp : test_suite_fp;
-  }
-};
-
-// Creates a new TestInfo object and registers it with Google Test;
-// returns the created object.
-//
-// Arguments:
-//
-//   test_suite_name:   name of the test suite
-//   name:             name of the test
-//   type_param        the name of the test's type parameter, or NULL if
-//                     this is not a typed or a type-parameterized test.
-//   value_param       text representation of the test's value parameter,
-//                     or NULL if this is not a type-parameterized test.
-//   code_location:    code location where the test is defined
-//   fixture_class_id: ID of the test fixture class
-//   set_up_tc:        pointer to the function that sets up the test suite
-//   tear_down_tc:     pointer to the function that tears down the test suite
-//   factory:          pointer to the factory that creates a test object.
-//                     The newly created TestInfo instance will assume
-//                     ownership of the factory object.
-GTEST_API_ TestInfo* MakeAndRegisterTestInfo(
-    const char* test_suite_name, const char* name, const char* type_param,
-    const char* value_param, CodeLocation code_location,
-    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
-    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory);
-
-// If *pstr starts with the given prefix, modifies *pstr to be right
-// past the prefix and returns true; otherwise leaves *pstr unchanged
-// and returns false.  None of pstr, *pstr, and prefix can be NULL.
-GTEST_API_ bool SkipPrefix(const char* prefix, const char** pstr);
-
-#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-// State of the definition of a type-parameterized test suite.
-class GTEST_API_ TypedTestSuitePState {
- public:
-  TypedTestSuitePState() : registered_(false) {}
-
-  // Adds the given test name to defined_test_names_ and return true
-  // if the test suite hasn't been registered; otherwise aborts the
-  // program.
-  bool AddTestName(const char* file, int line, const char* case_name,
-                   const char* test_name) {
-    if (registered_) {
-      fprintf(stderr,
-              "%s Test %s must be defined before "
-              "REGISTER_TYPED_TEST_SUITE_P(%s, ...).\n",
-              FormatFileLocation(file, line).c_str(), test_name, case_name);
-      fflush(stderr);
-      posix::Abort();
-    }
-    registered_tests_.insert(
-        ::std::make_pair(test_name, CodeLocation(file, line)));
-    return true;
-  }
-
-  bool TestExists(const std::string& test_name) const {
-    return registered_tests_.count(test_name) > 0;
-  }
-
-  const CodeLocation& GetCodeLocation(const std::string& test_name) const {
-    RegisteredTestsMap::const_iterator it = registered_tests_.find(test_name);
-    GTEST_CHECK_(it != registered_tests_.end());
-    return it->second;
-  }
-
-  // Verifies that registered_tests match the test names in
-  // defined_test_names_; returns registered_tests if successful, or
-  // aborts the program otherwise.
-  const char* VerifyRegisteredTestNames(
-      const char* file, int line, const char* registered_tests);
-
- private:
-  typedef ::std::map<std::string, CodeLocation> RegisteredTestsMap;
-
-  bool registered_;
-  RegisteredTestsMap registered_tests_;
-};
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-using TypedTestCasePState = TypedTestSuitePState;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-// Skips to the first non-space char after the first comma in 'str';
-// returns NULL if no comma is found in 'str'.
-inline const char* SkipComma(const char* str) {
-  const char* comma = strchr(str, ',');
-  if (comma == nullptr) {
-    return nullptr;
-  }
-  while (IsSpace(*(++comma))) {}
-  return comma;
-}
-
-// Returns the prefix of 'str' before the first comma in it; returns
-// the entire string if it contains no comma.
-inline std::string GetPrefixUntilComma(const char* str) {
-  const char* comma = strchr(str, ',');
-  return comma == nullptr ? str : std::string(str, comma);
-}
-
-// Splits a given string on a given delimiter, populating a given
-// vector with the fields.
-void SplitString(const ::std::string& str, char delimiter,
-                 ::std::vector< ::std::string>* dest);
-
-// The default argument to the template below for the case when the user does
-// not provide a name generator.
-struct DefaultNameGenerator {
-  template <typename T>
-  static std::string GetName(int i) {
-    return StreamableToString(i);
-  }
-};
-
-template <typename Provided = DefaultNameGenerator>
-struct NameGeneratorSelector {
-  typedef Provided type;
-};
-
-template <typename NameGenerator>
-void GenerateNamesRecursively(Types0, std::vector<std::string>*, int) {}
-
-template <typename NameGenerator, typename Types>
-void GenerateNamesRecursively(Types, std::vector<std::string>* result, int i) {
-  result->push_back(NameGenerator::template GetName<typename Types::Head>(i));
-  GenerateNamesRecursively<NameGenerator>(typename Types::Tail(), result,
-                                          i + 1);
-}
-
-template <typename NameGenerator, typename Types>
-std::vector<std::string> GenerateNames() {
-  std::vector<std::string> result;
-  GenerateNamesRecursively<NameGenerator>(Types(), &result, 0);
-  return result;
-}
-
-// TypeParameterizedTest<Fixture, TestSel, Types>::Register()
-// registers a list of type-parameterized tests with Google Test.  The
-// return value is insignificant - we just need to return something
-// such that we can call this function in a namespace scope.
-//
-// Implementation note: The GTEST_TEMPLATE_ macro declares a template
-// template parameter.  It's defined in gtest-type-util.h.
-template <GTEST_TEMPLATE_ Fixture, class TestSel, typename Types>
-class TypeParameterizedTest {
- public:
-  // 'index' is the index of the test in the type list 'Types'
-  // specified in INSTANTIATE_TYPED_TEST_SUITE_P(Prefix, TestSuite,
-  // Types).  Valid values for 'index' are [0, N - 1] where N is the
-  // length of Types.
-  static bool Register(const char* prefix, const CodeLocation& code_location,
-                       const char* case_name, const char* test_names, int index,
-                       const std::vector<std::string>& type_names =
-                           GenerateNames<DefaultNameGenerator, Types>()) {
-    typedef typename Types::Head Type;
-    typedef Fixture<Type> FixtureClass;
-    typedef typename GTEST_BIND_(TestSel, Type) TestClass;
-
-    // First, registers the first type-parameterized test in the type
-    // list.
-    MakeAndRegisterTestInfo(
-        (std::string(prefix) + (prefix[0] == '\0' ? "" : "/") + case_name +
-         "/" + type_names[static_cast<size_t>(index)])
-            .c_str(),
-        StripTrailingSpaces(GetPrefixUntilComma(test_names)).c_str(),
-        GetTypeName<Type>().c_str(),
-        nullptr,  // No value parameter.
-        code_location, GetTypeId<FixtureClass>(),
-        SuiteApiResolver<TestClass>::GetSetUpCaseOrSuite(
-            code_location.file.c_str(), code_location.line),
-        SuiteApiResolver<TestClass>::GetTearDownCaseOrSuite(
-            code_location.file.c_str(), code_location.line),
-        new TestFactoryImpl<TestClass>);
-
-    // Next, recurses (at compile time) with the tail of the type list.
-    return TypeParameterizedTest<Fixture, TestSel,
-                                 typename Types::Tail>::Register(prefix,
-                                                                 code_location,
-                                                                 case_name,
-                                                                 test_names,
-                                                                 index + 1,
-                                                                 type_names);
-  }
-};
-
-// The base case for the compile time recursion.
-template <GTEST_TEMPLATE_ Fixture, class TestSel>
-class TypeParameterizedTest<Fixture, TestSel, Types0> {
- public:
-  static bool Register(const char* /*prefix*/, const CodeLocation&,
-                       const char* /*case_name*/, const char* /*test_names*/,
-                       int /*index*/,
-                       const std::vector<std::string>& =
-                           std::vector<std::string>() /*type_names*/) {
-    return true;
-  }
-};
-
-// TypeParameterizedTestSuite<Fixture, Tests, Types>::Register()
-// registers *all combinations* of 'Tests' and 'Types' with Google
-// Test.  The return value is insignificant - we just need to return
-// something such that we can call this function in a namespace scope.
-template <GTEST_TEMPLATE_ Fixture, typename Tests, typename Types>
-class TypeParameterizedTestSuite {
- public:
-  static bool Register(const char* prefix, CodeLocation code_location,
-                       const TypedTestSuitePState* state, const char* case_name,
-                       const char* test_names,
-                       const std::vector<std::string>& type_names =
-                           GenerateNames<DefaultNameGenerator, Types>()) {
-    std::string test_name = StripTrailingSpaces(
-        GetPrefixUntilComma(test_names));
-    if (!state->TestExists(test_name)) {
-      fprintf(stderr, "Failed to get code location for test %s.%s at %s.",
-              case_name, test_name.c_str(),
-              FormatFileLocation(code_location.file.c_str(),
-                                 code_location.line).c_str());
-      fflush(stderr);
-      posix::Abort();
-    }
-    const CodeLocation& test_location = state->GetCodeLocation(test_name);
-
-    typedef typename Tests::Head Head;
-
-    // First, register the first test in 'Test' for each type in 'Types'.
-    TypeParameterizedTest<Fixture, Head, Types>::Register(
-        prefix, test_location, case_name, test_names, 0, type_names);
-
-    // Next, recurses (at compile time) with the tail of the test list.
-    return TypeParameterizedTestSuite<Fixture, typename Tests::Tail,
-                                      Types>::Register(prefix, code_location,
-                                                       state, case_name,
-                                                       SkipComma(test_names),
-                                                       type_names);
-  }
-};
-
-// The base case for the compile time recursion.
-template <GTEST_TEMPLATE_ Fixture, typename Types>
-class TypeParameterizedTestSuite<Fixture, Templates0, Types> {
- public:
-  static bool Register(const char* /*prefix*/, const CodeLocation&,
-                       const TypedTestSuitePState* /*state*/,
-                       const char* /*case_name*/, const char* /*test_names*/,
-                       const std::vector<std::string>& =
-                           std::vector<std::string>() /*type_names*/) {
-    return true;
-  }
-};
-
-#endif  // GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
-// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
-GTEST_API_ std::string GetCurrentOsStackTraceExceptTop(
-    UnitTest* unit_test, int skip_count);
-
-// Helpers for suppressing warnings on unreachable code or constant
-// condition.
-
-// Always returns true.
-GTEST_API_ bool AlwaysTrue();
-
-// Always returns false.
-inline bool AlwaysFalse() { return !AlwaysTrue(); }
-
-// Helper for suppressing false warning from Clang on a const char*
-// variable declared in a conditional expression always being NULL in
-// the else branch.
-struct GTEST_API_ ConstCharPtr {
-  ConstCharPtr(const char* str) : value(str) {}
-  operator bool() const { return true; }
-  const char* value;
-};
-
-// A simple Linear Congruential Generator for generating random
-// numbers with a uniform distribution.  Unlike rand() and srand(), it
-// doesn't use global state (and therefore can't interfere with user
-// code).  Unlike rand_r(), it's portable.  An LCG isn't very random,
-// but it's good enough for our purposes.
-class GTEST_API_ Random {
- public:
-  static const UInt32 kMaxRange = 1u << 31;
-
-  explicit Random(UInt32 seed) : state_(seed) {}
-
-  void Reseed(UInt32 seed) { state_ = seed; }
-
-  // Generates a random number from [0, range).  Crashes if 'range' is
-  // 0 or greater than kMaxRange.
-  UInt32 Generate(UInt32 range);
-
- private:
-  UInt32 state_;
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Random);
-};
-
-// Turns const U&, U&, const U, and U all into U.
-#define GTEST_REMOVE_REFERENCE_AND_CONST_(T) \
-  typename std::remove_const<typename std::remove_reference<T>::type>::type
-
-// IsAProtocolMessage<T>::value is a compile-time bool constant that's
-// true if and only if T is type proto2::Message or a subclass of it.
-template <typename T>
-struct IsAProtocolMessage
-    : public bool_constant<
-          std::is_convertible<const T*, const ::proto2::Message*>::value> {};
-
-// When the compiler sees expression IsContainerTest<C>(0), if C is an
-// STL-style container class, the first overload of IsContainerTest
-// will be viable (since both C::iterator* and C::const_iterator* are
-// valid types and NULL can be implicitly converted to them).  It will
-// be picked over the second overload as 'int' is a perfect match for
-// the type of argument 0.  If C::iterator or C::const_iterator is not
-// a valid type, the first overload is not viable, and the second
-// overload will be picked.  Therefore, we can determine whether C is
-// a container class by checking the type of IsContainerTest<C>(0).
-// The value of the expression is insignificant.
-//
-// In C++11 mode we check the existence of a const_iterator and that an
-// iterator is properly implemented for the container.
-//
-// For pre-C++11 that we look for both C::iterator and C::const_iterator.
-// The reason is that C++ injects the name of a class as a member of the
-// class itself (e.g. you can refer to class iterator as either
-// 'iterator' or 'iterator::iterator').  If we look for C::iterator
-// only, for example, we would mistakenly think that a class named
-// iterator is an STL container.
-//
-// Also note that the simpler approach of overloading
-// IsContainerTest(typename C::const_iterator*) and
-// IsContainerTest(...) doesn't work with Visual Age C++ and Sun C++.
-typedef int IsContainer;
-template <class C,
-          class Iterator = decltype(::std::declval<const C&>().begin()),
-          class = decltype(::std::declval<const C&>().end()),
-          class = decltype(++::std::declval<Iterator&>()),
-          class = decltype(*::std::declval<Iterator>()),
-          class = typename C::const_iterator>
-IsContainer IsContainerTest(int /* dummy */) {
-  return 0;
-}
-
-typedef char IsNotContainer;
-template <class C>
-IsNotContainer IsContainerTest(long /* dummy */) { return '\0'; }
-
-// Trait to detect whether a type T is a hash table.
-// The heuristic used is that the type contains an inner type `hasher` and does
-// not contain an inner type `reverse_iterator`.
-// If the container is iterable in reverse, then order might actually matter.
-template <typename T>
-struct IsHashTable {
- private:
-  template <typename U>
-  static char test(typename U::hasher*, typename U::reverse_iterator*);
-  template <typename U>
-  static int test(typename U::hasher*, ...);
-  template <typename U>
-  static char test(...);
-
- public:
-  static const bool value = sizeof(test<T>(nullptr, nullptr)) == sizeof(int);
-};
-
-template <typename T>
-const bool IsHashTable<T>::value;
-
-template <typename C,
-          bool = sizeof(IsContainerTest<C>(0)) == sizeof(IsContainer)>
-struct IsRecursiveContainerImpl;
-
-template <typename C>
-struct IsRecursiveContainerImpl<C, false> : public std::false_type {};
-
-// Since the IsRecursiveContainerImpl depends on the IsContainerTest we need to
-// obey the same inconsistencies as the IsContainerTest, namely check if
-// something is a container is relying on only const_iterator in C++11 and
-// is relying on both const_iterator and iterator otherwise
-template <typename C>
-struct IsRecursiveContainerImpl<C, true> {
-  using value_type = decltype(*std::declval<typename C::const_iterator>());
-  using type =
-      std::is_same<typename std::remove_const<
-                       typename std::remove_reference<value_type>::type>::type,
-                   C>;
-};
-
-// IsRecursiveContainer<Type> is a unary compile-time predicate that
-// evaluates whether C is a recursive container type. A recursive container
-// type is a container type whose value_type is equal to the container type
-// itself. An example for a recursive container type is
-// boost::filesystem::path, whose iterator has a value_type that is equal to
-// boost::filesystem::path.
-template <typename C>
-struct IsRecursiveContainer : public IsRecursiveContainerImpl<C>::type {};
-
-// Utilities for native arrays.
-
-// ArrayEq() compares two k-dimensional native arrays using the
-// elements' operator==, where k can be any integer >= 0.  When k is
-// 0, ArrayEq() degenerates into comparing a single pair of values.
-
-template <typename T, typename U>
-bool ArrayEq(const T* lhs, size_t size, const U* rhs);
-
-// This generic version is used when k is 0.
-template <typename T, typename U>
-inline bool ArrayEq(const T& lhs, const U& rhs) { return lhs == rhs; }
-
-// This overload is used when k >= 1.
-template <typename T, typename U, size_t N>
-inline bool ArrayEq(const T(&lhs)[N], const U(&rhs)[N]) {
-  return internal::ArrayEq(lhs, N, rhs);
-}
-
-// This helper reduces code bloat.  If we instead put its logic inside
-// the previous ArrayEq() function, arrays with different sizes would
-// lead to different copies of the template code.
-template <typename T, typename U>
-bool ArrayEq(const T* lhs, size_t size, const U* rhs) {
-  for (size_t i = 0; i != size; i++) {
-    if (!internal::ArrayEq(lhs[i], rhs[i]))
-      return false;
-  }
-  return true;
-}
-
-// Finds the first element in the iterator range [begin, end) that
-// equals elem.  Element may be a native array type itself.
-template <typename Iter, typename Element>
-Iter ArrayAwareFind(Iter begin, Iter end, const Element& elem) {
-  for (Iter it = begin; it != end; ++it) {
-    if (internal::ArrayEq(*it, elem))
-      return it;
-  }
-  return end;
-}
-
-// CopyArray() copies a k-dimensional native array using the elements'
-// operator=, where k can be any integer >= 0.  When k is 0,
-// CopyArray() degenerates into copying a single value.
-
-template <typename T, typename U>
-void CopyArray(const T* from, size_t size, U* to);
-
-// This generic version is used when k is 0.
-template <typename T, typename U>
-inline void CopyArray(const T& from, U* to) { *to = from; }
-
-// This overload is used when k >= 1.
-template <typename T, typename U, size_t N>
-inline void CopyArray(const T(&from)[N], U(*to)[N]) {
-  internal::CopyArray(from, N, *to);
-}
-
-// This helper reduces code bloat.  If we instead put its logic inside
-// the previous CopyArray() function, arrays with different sizes
-// would lead to different copies of the template code.
-template <typename T, typename U>
-void CopyArray(const T* from, size_t size, U* to) {
-  for (size_t i = 0; i != size; i++) {
-    internal::CopyArray(from[i], to + i);
-  }
-}
-
-// The relation between an NativeArray object (see below) and the
-// native array it represents.
-// We use 2 different structs to allow non-copyable types to be used, as long
-// as RelationToSourceReference() is passed.
-struct RelationToSourceReference {};
-struct RelationToSourceCopy {};
-
-// Adapts a native array to a read-only STL-style container.  Instead
-// of the complete STL container concept, this adaptor only implements
-// members useful for Google Mock's container matchers.  New members
-// should be added as needed.  To simplify the implementation, we only
-// support Element being a raw type (i.e. having no top-level const or
-// reference modifier).  It's the client's responsibility to satisfy
-// this requirement.  Element can be an array type itself (hence
-// multi-dimensional arrays are supported).
-template <typename Element>
-class NativeArray {
- public:
-  // STL-style container typedefs.
-  typedef Element value_type;
-  typedef Element* iterator;
-  typedef const Element* const_iterator;
-
-  // Constructs from a native array. References the source.
-  NativeArray(const Element* array, size_t count, RelationToSourceReference) {
-    InitRef(array, count);
-  }
-
-  // Constructs from a native array. Copies the source.
-  NativeArray(const Element* array, size_t count, RelationToSourceCopy) {
-    InitCopy(array, count);
-  }
-
-  // Copy constructor.
-  NativeArray(const NativeArray& rhs) {
-    (this->*rhs.clone_)(rhs.array_, rhs.size_);
-  }
-
-  ~NativeArray() {
-    if (clone_ != &NativeArray::InitRef)
-      delete[] array_;
-  }
-
-  // STL-style container methods.
-  size_t size() const { return size_; }
-  const_iterator begin() const { return array_; }
-  const_iterator end() const { return array_ + size_; }
-  bool operator==(const NativeArray& rhs) const {
-    return size() == rhs.size() &&
-        ArrayEq(begin(), size(), rhs.begin());
-  }
-
- private:
-  static_assert(!std::is_const<Element>::value, "Type must not be const");
-  static_assert(!std::is_reference<Element>::value,
-                "Type must not be a reference");
-
-  // Initializes this object with a copy of the input.
-  void InitCopy(const Element* array, size_t a_size) {
-    Element* const copy = new Element[a_size];
-    CopyArray(array, a_size, copy);
-    array_ = copy;
-    size_ = a_size;
-    clone_ = &NativeArray::InitCopy;
-  }
-
-  // Initializes this object with a reference of the input.
-  void InitRef(const Element* array, size_t a_size) {
-    array_ = array;
-    size_ = a_size;
-    clone_ = &NativeArray::InitRef;
-  }
-
-  const Element* array_;
-  size_t size_;
-  void (NativeArray::*clone_)(const Element*, size_t);
-
-  GTEST_DISALLOW_ASSIGN_(NativeArray);
-};
-
-// Backport of std::index_sequence.
-template <size_t... Is>
-struct IndexSequence {
-  using type = IndexSequence;
-};
-
-// Double the IndexSequence, and one if plus_one is true.
-template <bool plus_one, typename T, size_t sizeofT>
-struct DoubleSequence;
-template <size_t... I, size_t sizeofT>
-struct DoubleSequence<true, IndexSequence<I...>, sizeofT> {
-  using type = IndexSequence<I..., (sizeofT + I)..., 2 * sizeofT>;
-};
-template <size_t... I, size_t sizeofT>
-struct DoubleSequence<false, IndexSequence<I...>, sizeofT> {
-  using type = IndexSequence<I..., (sizeofT + I)...>;
-};
-
-// Backport of std::make_index_sequence.
-// It uses O(ln(N)) instantiation depth.
-template <size_t N>
-struct MakeIndexSequence
-    : DoubleSequence<N % 2 == 1, typename MakeIndexSequence<N / 2>::type,
-                     N / 2>::type {};
-
-template <>
-struct MakeIndexSequence<0> : IndexSequence<> {};
-
-// FIXME: This implementation of ElemFromList is O(1) in instantiation depth,
-// but it is O(N^2) in total instantiations. Not sure if this is the best
-// tradeoff, as it will make it somewhat slow to compile.
-template <typename T, size_t, size_t>
-struct ElemFromListImpl {};
-
-template <typename T, size_t I>
-struct ElemFromListImpl<T, I, I> {
-  using type = T;
-};
-
-// Get the Nth element from T...
-// It uses O(1) instantiation depth.
-template <size_t N, typename I, typename... T>
-struct ElemFromList;
-
-template <size_t N, size_t... I, typename... T>
-struct ElemFromList<N, IndexSequence<I...>, T...>
-    : ElemFromListImpl<T, N, I>... {};
-
-template <typename... T>
-class FlatTuple;
-
-template <typename Derived, size_t I>
-struct FlatTupleElemBase;
-
-template <typename... T, size_t I>
-struct FlatTupleElemBase<FlatTuple<T...>, I> {
-  using value_type =
-      typename ElemFromList<I, typename MakeIndexSequence<sizeof...(T)>::type,
-                            T...>::type;
-  FlatTupleElemBase() = default;
-  explicit FlatTupleElemBase(value_type t) : value(std::move(t)) {}
-  value_type value;
-};
-
-template <typename Derived, typename Idx>
-struct FlatTupleBase;
-
-template <size_t... Idx, typename... T>
-struct FlatTupleBase<FlatTuple<T...>, IndexSequence<Idx...>>
-    : FlatTupleElemBase<FlatTuple<T...>, Idx>... {
-  using Indices = IndexSequence<Idx...>;
-  FlatTupleBase() = default;
-  explicit FlatTupleBase(T... t)
-      : FlatTupleElemBase<FlatTuple<T...>, Idx>(std::move(t))... {}
-};
-
-// Analog to std::tuple but with different tradeoffs.
-// This class minimizes the template instantiation depth, thus allowing more
-// elements that std::tuple would. std::tuple has been seen to require an
-// instantiation depth of more than 10x the number of elements in some
-// implementations.
-// FlatTuple and ElemFromList are not recursive and have a fixed depth
-// regardless of T...
-// MakeIndexSequence, on the other hand, it is recursive but with an
-// instantiation depth of O(ln(N)).
-template <typename... T>
-class FlatTuple
-    : private FlatTupleBase<FlatTuple<T...>,
-                            typename MakeIndexSequence<sizeof...(T)>::type> {
-  using Indices = typename FlatTuple::FlatTupleBase::Indices;
-
- public:
-  FlatTuple() = default;
-  explicit FlatTuple(T... t) : FlatTuple::FlatTupleBase(std::move(t)...) {}
-
-  template <size_t I>
-  const typename ElemFromList<I, Indices, T...>::type& Get() const {
-    return static_cast<const FlatTupleElemBase<FlatTuple, I>*>(this)->value;
-  }
-
-  template <size_t I>
-  typename ElemFromList<I, Indices, T...>::type& Get() {
-    return static_cast<FlatTupleElemBase<FlatTuple, I>*>(this)->value;
-  }
-};
-
-// Utility functions to be called with static_assert to induce deprecation
-// warnings.
-GTEST_INTERNAL_DEPRECATED(
-    "INSTANTIATE_TEST_CASE_P is deprecated, please use "
-    "INSTANTIATE_TEST_SUITE_P")
-constexpr bool InstantiateTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "TYPED_TEST_CASE_P is deprecated, please use "
-    "TYPED_TEST_SUITE_P")
-constexpr bool TypedTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "TYPED_TEST_CASE is deprecated, please use "
-    "TYPED_TEST_SUITE")
-constexpr bool TypedTestCaseIsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "REGISTER_TYPED_TEST_CASE_P is deprecated, please use "
-    "REGISTER_TYPED_TEST_SUITE_P")
-constexpr bool RegisterTypedTestCase_P_IsDeprecated() { return true; }
-
-GTEST_INTERNAL_DEPRECATED(
-    "INSTANTIATE_TYPED_TEST_CASE_P is deprecated, please use "
-    "INSTANTIATE_TYPED_TEST_SUITE_P")
-constexpr bool InstantiateTypedTestCase_P_IsDeprecated() { return true; }
-
-}  // namespace internal
-}  // namespace testing
-
-#define GTEST_MESSAGE_AT_(file, line, message, result_type) \
-  ::testing::internal::AssertHelper(result_type, file, line, message) \
-    = ::testing::Message()
-
-#define GTEST_MESSAGE_(message, result_type) \
-  GTEST_MESSAGE_AT_(__FILE__, __LINE__, message, result_type)
-
-#define GTEST_FATAL_FAILURE_(message) \
-  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kFatalFailure)
-
-#define GTEST_NONFATAL_FAILURE_(message) \
-  GTEST_MESSAGE_(message, ::testing::TestPartResult::kNonFatalFailure)
-
-#define GTEST_SUCCESS_(message) \
-  GTEST_MESSAGE_(message, ::testing::TestPartResult::kSuccess)
-
-#define GTEST_SKIP_(message) \
-  return GTEST_MESSAGE_(message, ::testing::TestPartResult::kSkip)
-
-// Suppress MSVC warning 4072 (unreachable code) for the code following
-// statement if it returns or throws (or doesn't return or throw in some
-// situations).
-#define GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement) \
-  if (::testing::internal::AlwaysTrue()) { statement; }
-
-#define GTEST_TEST_THROW_(statement, expected_exception, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::ConstCharPtr gtest_msg = "") { \
-    bool gtest_caught_expected = false; \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    catch (expected_exception const&) { \
-      gtest_caught_expected = true; \
-    } \
-    catch (...) { \
-      gtest_msg.value = \
-          "Expected: " #statement " throws an exception of type " \
-          #expected_exception ".\n  Actual: it throws a different type."; \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
-    } \
-    if (!gtest_caught_expected) { \
-      gtest_msg.value = \
-          "Expected: " #statement " throws an exception of type " \
-          #expected_exception ".\n  Actual: it throws nothing."; \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testthrow_, __LINE__): \
-      fail(gtest_msg.value)
-
-#define GTEST_TEST_NO_THROW_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    catch (...) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testnothrow_, __LINE__): \
-      fail("Expected: " #statement " doesn't throw an exception.\n" \
-           "  Actual: it throws.")
-
-#define GTEST_TEST_ANY_THROW_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    bool gtest_caught_any = false; \
-    try { \
-      GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    } \
-    catch (...) { \
-      gtest_caught_any = true; \
-    } \
-    if (!gtest_caught_any) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testanythrow_, __LINE__): \
-      fail("Expected: " #statement " throws an exception.\n" \
-           "  Actual: it doesn't.")
-
-
-// Implements Boolean test assertions such as EXPECT_TRUE. expression can be
-// either a boolean expression or an AssertionResult. text is a textual
-// represenation of expression as it was passed into the EXPECT_TRUE.
-#define GTEST_TEST_BOOLEAN_(expression, text, actual, expected, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (const ::testing::AssertionResult gtest_ar_ = \
-      ::testing::AssertionResult(expression)) \
-    ; \
-  else \
-    fail(::testing::internal::GetBoolAssertionFailureMessage(\
-        gtest_ar_, text, #actual, #expected).c_str())
-
-#define GTEST_TEST_NO_FATAL_FAILURE_(statement, fail) \
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-  if (::testing::internal::AlwaysTrue()) { \
-    ::testing::internal::HasNewFatalFailureHelper gtest_fatal_failure_checker; \
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(statement); \
-    if (gtest_fatal_failure_checker.has_new_fatal_failure()) { \
-      goto GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__); \
-    } \
-  } else \
-    GTEST_CONCAT_TOKEN_(gtest_label_testnofatal_, __LINE__): \
-      fail("Expected: " #statement " doesn't generate new fatal " \
-           "failures in the current thread.\n" \
-           "  Actual: it does.")
-
-// Expands to the name of the class that implements the given test.
-#define GTEST_TEST_CLASS_NAME_(test_suite_name, test_name) \
-  test_suite_name##_##test_name##_Test
-
-// Helper macro for defining tests.
-#define GTEST_TEST_(test_suite_name, test_name, parent_class, parent_id)      \
-  static_assert(sizeof(GTEST_STRINGIFY_(test_suite_name)) > 1,                \
-                "test_suite_name must not be empty");                         \
-  static_assert(sizeof(GTEST_STRINGIFY_(test_name)) > 1,                      \
-                "test_name must not be empty");                               \
-  class GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)                    \
-      : public parent_class {                                                 \
-   public:                                                                    \
-    GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)() {}                   \
-                                                                              \
-   private:                                                                   \
-    virtual void TestBody();                                                  \
-    static ::testing::TestInfo* const test_info_ GTEST_ATTRIBUTE_UNUSED_;     \
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(GTEST_TEST_CLASS_NAME_(test_suite_name,   \
-                                                           test_name));       \
-  };                                                                          \
-                                                                              \
-  ::testing::TestInfo* const GTEST_TEST_CLASS_NAME_(test_suite_name,          \
-                                                    test_name)::test_info_ =  \
-      ::testing::internal::MakeAndRegisterTestInfo(                           \
-          #test_suite_name, #test_name, nullptr, nullptr,                     \
-          ::testing::internal::CodeLocation(__FILE__, __LINE__), (parent_id), \
-          ::testing::internal::SuiteApiResolver<                              \
-              parent_class>::GetSetUpCaseOrSuite(__FILE__, __LINE__),         \
-          ::testing::internal::SuiteApiResolver<                              \
-              parent_class>::GetTearDownCaseOrSuite(__FILE__, __LINE__),      \
-          new ::testing::internal::TestFactoryImpl<GTEST_TEST_CLASS_NAME_(    \
-              test_suite_name, test_name)>);                                  \
-  void GTEST_TEST_CLASS_NAME_(test_suite_name, test_name)::TestBody()
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_INTERNAL_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-param-util.h b/3rdparty/gtest/include/gtest/internal/gtest-param-util.h
deleted file mode 100644
index 97533993..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-param-util.h
+++ /dev/null
@@ -1,883 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Type and function utilities for implementing parameterized tests.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
-
-#include <ctype.h>
-
-#include <cassert>
-#include <iterator>
-#include <memory>
-#include <set>
-#include <tuple>
-#include <utility>
-#include <vector>
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-printers.h"
-
-namespace testing {
-// Input to a parameterized test name generator, describing a test parameter.
-// Consists of the parameter value and the integer parameter index.
-template <class ParamType>
-struct TestParamInfo {
-  TestParamInfo(const ParamType& a_param, size_t an_index) :
-    param(a_param),
-    index(an_index) {}
-  ParamType param;
-  size_t index;
-};
-
-// A builtin parameterized test name generator which returns the result of
-// testing::PrintToString.
-struct PrintToStringParamName {
-  template <class ParamType>
-  std::string operator()(const TestParamInfo<ParamType>& info) const {
-    return PrintToString(info.param);
-  }
-};
-
-namespace internal {
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-// Utility Functions
-
-// Outputs a message explaining invalid registration of different
-// fixture class for the same test suite. This may happen when
-// TEST_P macro is used to define two tests with the same name
-// but in different namespaces.
-GTEST_API_ void ReportInvalidTestSuiteType(const char* test_suite_name,
-                                           CodeLocation code_location);
-
-template <typename> class ParamGeneratorInterface;
-template <typename> class ParamGenerator;
-
-// Interface for iterating over elements provided by an implementation
-// of ParamGeneratorInterface<T>.
-template <typename T>
-class ParamIteratorInterface {
- public:
-  virtual ~ParamIteratorInterface() {}
-  // A pointer to the base generator instance.
-  // Used only for the purposes of iterator comparison
-  // to make sure that two iterators belong to the same generator.
-  virtual const ParamGeneratorInterface<T>* BaseGenerator() const = 0;
-  // Advances iterator to point to the next element
-  // provided by the generator. The caller is responsible
-  // for not calling Advance() on an iterator equal to
-  // BaseGenerator()->End().
-  virtual void Advance() = 0;
-  // Clones the iterator object. Used for implementing copy semantics
-  // of ParamIterator<T>.
-  virtual ParamIteratorInterface* Clone() const = 0;
-  // Dereferences the current iterator and provides (read-only) access
-  // to the pointed value. It is the caller's responsibility not to call
-  // Current() on an iterator equal to BaseGenerator()->End().
-  // Used for implementing ParamGenerator<T>::operator*().
-  virtual const T* Current() const = 0;
-  // Determines whether the given iterator and other point to the same
-  // element in the sequence generated by the generator.
-  // Used for implementing ParamGenerator<T>::operator==().
-  virtual bool Equals(const ParamIteratorInterface& other) const = 0;
-};
-
-// Class iterating over elements provided by an implementation of
-// ParamGeneratorInterface<T>. It wraps ParamIteratorInterface<T>
-// and implements the const forward iterator concept.
-template <typename T>
-class ParamIterator {
- public:
-  typedef T value_type;
-  typedef const T& reference;
-  typedef ptrdiff_t difference_type;
-
-  // ParamIterator assumes ownership of the impl_ pointer.
-  ParamIterator(const ParamIterator& other) : impl_(other.impl_->Clone()) {}
-  ParamIterator& operator=(const ParamIterator& other) {
-    if (this != &other)
-      impl_.reset(other.impl_->Clone());
-    return *this;
-  }
-
-  const T& operator*() const { return *impl_->Current(); }
-  const T* operator->() const { return impl_->Current(); }
-  // Prefix version of operator++.
-  ParamIterator& operator++() {
-    impl_->Advance();
-    return *this;
-  }
-  // Postfix version of operator++.
-  ParamIterator operator++(int /*unused*/) {
-    ParamIteratorInterface<T>* clone = impl_->Clone();
-    impl_->Advance();
-    return ParamIterator(clone);
-  }
-  bool operator==(const ParamIterator& other) const {
-    return impl_.get() == other.impl_.get() || impl_->Equals(*other.impl_);
-  }
-  bool operator!=(const ParamIterator& other) const {
-    return !(*this == other);
-  }
-
- private:
-  friend class ParamGenerator<T>;
-  explicit ParamIterator(ParamIteratorInterface<T>* impl) : impl_(impl) {}
-  std::unique_ptr<ParamIteratorInterface<T> > impl_;
-};
-
-// ParamGeneratorInterface<T> is the binary interface to access generators
-// defined in other translation units.
-template <typename T>
-class ParamGeneratorInterface {
- public:
-  typedef T ParamType;
-
-  virtual ~ParamGeneratorInterface() {}
-
-  // Generator interface definition
-  virtual ParamIteratorInterface<T>* Begin() const = 0;
-  virtual ParamIteratorInterface<T>* End() const = 0;
-};
-
-// Wraps ParamGeneratorInterface<T> and provides general generator syntax
-// compatible with the STL Container concept.
-// This class implements copy initialization semantics and the contained
-// ParamGeneratorInterface<T> instance is shared among all copies
-// of the original object. This is possible because that instance is immutable.
-template<typename T>
-class ParamGenerator {
- public:
-  typedef ParamIterator<T> iterator;
-
-  explicit ParamGenerator(ParamGeneratorInterface<T>* impl) : impl_(impl) {}
-  ParamGenerator(const ParamGenerator& other) : impl_(other.impl_) {}
-
-  ParamGenerator& operator=(const ParamGenerator& other) {
-    impl_ = other.impl_;
-    return *this;
-  }
-
-  iterator begin() const { return iterator(impl_->Begin()); }
-  iterator end() const { return iterator(impl_->End()); }
-
- private:
-  std::shared_ptr<const ParamGeneratorInterface<T> > impl_;
-};
-
-// Generates values from a range of two comparable values. Can be used to
-// generate sequences of user-defined types that implement operator+() and
-// operator<().
-// This class is used in the Range() function.
-template <typename T, typename IncrementT>
-class RangeGenerator : public ParamGeneratorInterface<T> {
- public:
-  RangeGenerator(T begin, T end, IncrementT step)
-      : begin_(begin), end_(end),
-        step_(step), end_index_(CalculateEndIndex(begin, end, step)) {}
-  ~RangeGenerator() override {}
-
-  ParamIteratorInterface<T>* Begin() const override {
-    return new Iterator(this, begin_, 0, step_);
-  }
-  ParamIteratorInterface<T>* End() const override {
-    return new Iterator(this, end_, end_index_, step_);
-  }
-
- private:
-  class Iterator : public ParamIteratorInterface<T> {
-   public:
-    Iterator(const ParamGeneratorInterface<T>* base, T value, int index,
-             IncrementT step)
-        : base_(base), value_(value), index_(index), step_(step) {}
-    ~Iterator() override {}
-
-    const ParamGeneratorInterface<T>* BaseGenerator() const override {
-      return base_;
-    }
-    void Advance() override {
-      value_ = static_cast<T>(value_ + step_);
-      index_++;
-    }
-    ParamIteratorInterface<T>* Clone() const override {
-      return new Iterator(*this);
-    }
-    const T* Current() const override { return &value_; }
-    bool Equals(const ParamIteratorInterface<T>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      const int other_index =
-          CheckedDowncastToActualType<const Iterator>(&other)->index_;
-      return index_ == other_index;
-    }
-
-   private:
-    Iterator(const Iterator& other)
-        : ParamIteratorInterface<T>(),
-          base_(other.base_), value_(other.value_), index_(other.index_),
-          step_(other.step_) {}
-
-    // No implementation - assignment is unsupported.
-    void operator=(const Iterator& other);
-
-    const ParamGeneratorInterface<T>* const base_;
-    T value_;
-    int index_;
-    const IncrementT step_;
-  };  // class RangeGenerator::Iterator
-
-  static int CalculateEndIndex(const T& begin,
-                               const T& end,
-                               const IncrementT& step) {
-    int end_index = 0;
-    for (T i = begin; i < end; i = static_cast<T>(i + step))
-      end_index++;
-    return end_index;
-  }
-
-  // No implementation - assignment is unsupported.
-  void operator=(const RangeGenerator& other);
-
-  const T begin_;
-  const T end_;
-  const IncrementT step_;
-  // The index for the end() iterator. All the elements in the generated
-  // sequence are indexed (0-based) to aid iterator comparison.
-  const int end_index_;
-};  // class RangeGenerator
-
-
-// Generates values from a pair of STL-style iterators. Used in the
-// ValuesIn() function. The elements are copied from the source range
-// since the source can be located on the stack, and the generator
-// is likely to persist beyond that stack frame.
-template <typename T>
-class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
- public:
-  template <typename ForwardIterator>
-  ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
-      : container_(begin, end) {}
-  ~ValuesInIteratorRangeGenerator() override {}
-
-  ParamIteratorInterface<T>* Begin() const override {
-    return new Iterator(this, container_.begin());
-  }
-  ParamIteratorInterface<T>* End() const override {
-    return new Iterator(this, container_.end());
-  }
-
- private:
-  typedef typename ::std::vector<T> ContainerType;
-
-  class Iterator : public ParamIteratorInterface<T> {
-   public:
-    Iterator(const ParamGeneratorInterface<T>* base,
-             typename ContainerType::const_iterator iterator)
-        : base_(base), iterator_(iterator) {}
-    ~Iterator() override {}
-
-    const ParamGeneratorInterface<T>* BaseGenerator() const override {
-      return base_;
-    }
-    void Advance() override {
-      ++iterator_;
-      value_.reset();
-    }
-    ParamIteratorInterface<T>* Clone() const override {
-      return new Iterator(*this);
-    }
-    // We need to use cached value referenced by iterator_ because *iterator_
-    // can return a temporary object (and of type other then T), so just
-    // having "return &*iterator_;" doesn't work.
-    // value_ is updated here and not in Advance() because Advance()
-    // can advance iterator_ beyond the end of the range, and we cannot
-    // detect that fact. The client code, on the other hand, is
-    // responsible for not calling Current() on an out-of-range iterator.
-    const T* Current() const override {
-      if (value_.get() == nullptr) value_.reset(new T(*iterator_));
-      return value_.get();
-    }
-    bool Equals(const ParamIteratorInterface<T>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      return iterator_ ==
-          CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
-    }
-
-   private:
-    Iterator(const Iterator& other)
-          // The explicit constructor call suppresses a false warning
-          // emitted by gcc when supplied with the -Wextra option.
-        : ParamIteratorInterface<T>(),
-          base_(other.base_),
-          iterator_(other.iterator_) {}
-
-    const ParamGeneratorInterface<T>* const base_;
-    typename ContainerType::const_iterator iterator_;
-    // A cached value of *iterator_. We keep it here to allow access by
-    // pointer in the wrapping iterator's operator->().
-    // value_ needs to be mutable to be accessed in Current().
-    // Use of std::unique_ptr helps manage cached value's lifetime,
-    // which is bound by the lifespan of the iterator itself.
-    mutable std::unique_ptr<const T> value_;
-  };  // class ValuesInIteratorRangeGenerator::Iterator
-
-  // No implementation - assignment is unsupported.
-  void operator=(const ValuesInIteratorRangeGenerator& other);
-
-  const ContainerType container_;
-};  // class ValuesInIteratorRangeGenerator
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Default parameterized test name generator, returns a string containing the
-// integer test parameter index.
-template <class ParamType>
-std::string DefaultParamName(const TestParamInfo<ParamType>& info) {
-  Message name_stream;
-  name_stream << info.index;
-  return name_stream.GetString();
-}
-
-template <typename T = int>
-void TestNotEmpty() {
-  static_assert(sizeof(T) == 0, "Empty arguments are not allowed.");
-}
-template <typename T = int>
-void TestNotEmpty(const T&) {}
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Stores a parameter value and later creates tests parameterized with that
-// value.
-template <class TestClass>
-class ParameterizedTestFactory : public TestFactoryBase {
- public:
-  typedef typename TestClass::ParamType ParamType;
-  explicit ParameterizedTestFactory(ParamType parameter) :
-      parameter_(parameter) {}
-  Test* CreateTest() override {
-    TestClass::SetParam(&parameter_);
-    return new TestClass();
-  }
-
- private:
-  const ParamType parameter_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// TestMetaFactoryBase is a base class for meta-factories that create
-// test factories for passing into MakeAndRegisterTestInfo function.
-template <class ParamType>
-class TestMetaFactoryBase {
- public:
-  virtual ~TestMetaFactoryBase() {}
-
-  virtual TestFactoryBase* CreateTestFactory(ParamType parameter) = 0;
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// TestMetaFactory creates test factories for passing into
-// MakeAndRegisterTestInfo function. Since MakeAndRegisterTestInfo receives
-// ownership of test factory pointer, same factory object cannot be passed
-// into that method twice. But ParameterizedTestSuiteInfo is going to call
-// it for each Test/Parameter value combination. Thus it needs meta factory
-// creator class.
-template <class TestSuite>
-class TestMetaFactory
-    : public TestMetaFactoryBase<typename TestSuite::ParamType> {
- public:
-  using ParamType = typename TestSuite::ParamType;
-
-  TestMetaFactory() {}
-
-  TestFactoryBase* CreateTestFactory(ParamType parameter) override {
-    return new ParameterizedTestFactory<TestSuite>(parameter);
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteInfoBase is a generic interface
-// to ParameterizedTestSuiteInfo classes. ParameterizedTestSuiteInfoBase
-// accumulates test information provided by TEST_P macro invocations
-// and generators provided by INSTANTIATE_TEST_SUITE_P macro invocations
-// and uses that information to register all resulting test instances
-// in RegisterTests method. The ParameterizeTestSuiteRegistry class holds
-// a collection of pointers to the ParameterizedTestSuiteInfo objects
-// and calls RegisterTests() on each of them when asked.
-class ParameterizedTestSuiteInfoBase {
- public:
-  virtual ~ParameterizedTestSuiteInfoBase() {}
-
-  // Base part of test suite name for display purposes.
-  virtual const std::string& GetTestSuiteName() const = 0;
-  // Test case id to verify identity.
-  virtual TypeId GetTestSuiteTypeId() const = 0;
-  // UnitTest class invokes this method to register tests in this
-  // test suite right before running them in RUN_ALL_TESTS macro.
-  // This method should not be called more than once on any single
-  // instance of a ParameterizedTestSuiteInfoBase derived class.
-  virtual void RegisterTests() = 0;
-
- protected:
-  ParameterizedTestSuiteInfoBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfoBase);
-};
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteInfo accumulates tests obtained from TEST_P
-// macro invocations for a particular test suite and generators
-// obtained from INSTANTIATE_TEST_SUITE_P macro invocations for that
-// test suite. It registers tests with all values generated by all
-// generators when asked.
-template <class TestSuite>
-class ParameterizedTestSuiteInfo : public ParameterizedTestSuiteInfoBase {
- public:
-  // ParamType and GeneratorCreationFunc are private types but are required
-  // for declarations of public methods AddTestPattern() and
-  // AddTestSuiteInstantiation().
-  using ParamType = typename TestSuite::ParamType;
-  // A function that returns an instance of appropriate generator type.
-  typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
-  using ParamNameGeneratorFunc = std::string(const TestParamInfo<ParamType>&);
-
-  explicit ParameterizedTestSuiteInfo(const char* name,
-                                      CodeLocation code_location)
-      : test_suite_name_(name), code_location_(code_location) {}
-
-  // Test case base name for display purposes.
-  const std::string& GetTestSuiteName() const override {
-    return test_suite_name_;
-  }
-  // Test case id to verify identity.
-  TypeId GetTestSuiteTypeId() const override { return GetTypeId<TestSuite>(); }
-  // TEST_P macro uses AddTestPattern() to record information
-  // about a single test in a LocalTestInfo structure.
-  // test_suite_name is the base name of the test suite (without invocation
-  // prefix). test_base_name is the name of an individual test without
-  // parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
-  // test suite base name and DoBar is test base name.
-  void AddTestPattern(const char* test_suite_name, const char* test_base_name,
-                      TestMetaFactoryBase<ParamType>* meta_factory) {
-    tests_.push_back(std::shared_ptr<TestInfo>(
-        new TestInfo(test_suite_name, test_base_name, meta_factory)));
-  }
-  // INSTANTIATE_TEST_SUITE_P macro uses AddGenerator() to record information
-  // about a generator.
-  int AddTestSuiteInstantiation(const std::string& instantiation_name,
-                                GeneratorCreationFunc* func,
-                                ParamNameGeneratorFunc* name_func,
-                                const char* file, int line) {
-    instantiations_.push_back(
-        InstantiationInfo(instantiation_name, func, name_func, file, line));
-    return 0;  // Return value used only to run this method in namespace scope.
-  }
-  // UnitTest class invokes this method to register tests in this test suite
-  // test suites right before running tests in RUN_ALL_TESTS macro.
-  // This method should not be called more than once on any single
-  // instance of a ParameterizedTestSuiteInfoBase derived class.
-  // UnitTest has a guard to prevent from calling this method more than once.
-  void RegisterTests() override {
-    for (typename TestInfoContainer::iterator test_it = tests_.begin();
-         test_it != tests_.end(); ++test_it) {
-      std::shared_ptr<TestInfo> test_info = *test_it;
-      for (typename InstantiationContainer::iterator gen_it =
-               instantiations_.begin(); gen_it != instantiations_.end();
-               ++gen_it) {
-        const std::string& instantiation_name = gen_it->name;
-        ParamGenerator<ParamType> generator((*gen_it->generator)());
-        ParamNameGeneratorFunc* name_func = gen_it->name_func;
-        const char* file = gen_it->file;
-        int line = gen_it->line;
-
-        std::string test_suite_name;
-        if ( !instantiation_name.empty() )
-          test_suite_name = instantiation_name + "/";
-        test_suite_name += test_info->test_suite_base_name;
-
-        size_t i = 0;
-        std::set<std::string> test_param_names;
-        for (typename ParamGenerator<ParamType>::iterator param_it =
-                 generator.begin();
-             param_it != generator.end(); ++param_it, ++i) {
-          Message test_name_stream;
-
-          std::string param_name = name_func(
-              TestParamInfo<ParamType>(*param_it, i));
-
-          GTEST_CHECK_(IsValidParamName(param_name))
-              << "Parameterized test name '" << param_name
-              << "' is invalid, in " << file
-              << " line " << line << std::endl;
-
-          GTEST_CHECK_(test_param_names.count(param_name) == 0)
-              << "Duplicate parameterized test name '" << param_name
-              << "', in " << file << " line " << line << std::endl;
-
-          test_param_names.insert(param_name);
-
-          if (!test_info->test_base_name.empty()) {
-            test_name_stream << test_info->test_base_name << "/";
-          }
-          test_name_stream << param_name;
-          MakeAndRegisterTestInfo(
-              test_suite_name.c_str(), test_name_stream.GetString().c_str(),
-              nullptr,  // No type parameter.
-              PrintToString(*param_it).c_str(), code_location_,
-              GetTestSuiteTypeId(),
-              SuiteApiResolver<TestSuite>::GetSetUpCaseOrSuite(file, line),
-              SuiteApiResolver<TestSuite>::GetTearDownCaseOrSuite(file, line),
-              test_info->test_meta_factory->CreateTestFactory(*param_it));
-        }  // for param_it
-      }  // for gen_it
-    }  // for test_it
-  }    // RegisterTests
-
- private:
-  // LocalTestInfo structure keeps information about a single test registered
-  // with TEST_P macro.
-  struct TestInfo {
-    TestInfo(const char* a_test_suite_base_name, const char* a_test_base_name,
-             TestMetaFactoryBase<ParamType>* a_test_meta_factory)
-        : test_suite_base_name(a_test_suite_base_name),
-          test_base_name(a_test_base_name),
-          test_meta_factory(a_test_meta_factory) {}
-
-    const std::string test_suite_base_name;
-    const std::string test_base_name;
-    const std::unique_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
-  };
-  using TestInfoContainer = ::std::vector<std::shared_ptr<TestInfo> >;
-  // Records data received from INSTANTIATE_TEST_SUITE_P macros:
-  //  <Instantiation name, Sequence generator creation function,
-  //     Name generator function, Source file, Source line>
-  struct InstantiationInfo {
-      InstantiationInfo(const std::string &name_in,
-                        GeneratorCreationFunc* generator_in,
-                        ParamNameGeneratorFunc* name_func_in,
-                        const char* file_in,
-                        int line_in)
-          : name(name_in),
-            generator(generator_in),
-            name_func(name_func_in),
-            file(file_in),
-            line(line_in) {}
-
-      std::string name;
-      GeneratorCreationFunc* generator;
-      ParamNameGeneratorFunc* name_func;
-      const char* file;
-      int line;
-  };
-  typedef ::std::vector<InstantiationInfo> InstantiationContainer;
-
-  static bool IsValidParamName(const std::string& name) {
-    // Check for empty string
-    if (name.empty())
-      return false;
-
-    // Check for invalid characters
-    for (std::string::size_type index = 0; index < name.size(); ++index) {
-      if (!isalnum(name[index]) && name[index] != '_')
-        return false;
-    }
-
-    return true;
-  }
-
-  const std::string test_suite_name_;
-  CodeLocation code_location_;
-  TestInfoContainer tests_;
-  InstantiationContainer instantiations_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteInfo);
-};  // class ParameterizedTestSuiteInfo
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-template <class TestCase>
-using ParameterizedTestCaseInfo = ParameterizedTestSuiteInfo<TestCase>;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// ParameterizedTestSuiteRegistry contains a map of
-// ParameterizedTestSuiteInfoBase classes accessed by test suite names. TEST_P
-// and INSTANTIATE_TEST_SUITE_P macros use it to locate their corresponding
-// ParameterizedTestSuiteInfo descriptors.
-class ParameterizedTestSuiteRegistry {
- public:
-  ParameterizedTestSuiteRegistry() {}
-  ~ParameterizedTestSuiteRegistry() {
-    for (auto& test_suite_info : test_suite_infos_) {
-      delete test_suite_info;
-    }
-  }
-
-  // Looks up or creates and returns a structure containing information about
-  // tests and instantiations of a particular test suite.
-  template <class TestSuite>
-  ParameterizedTestSuiteInfo<TestSuite>* GetTestSuitePatternHolder(
-      const char* test_suite_name, CodeLocation code_location) {
-    ParameterizedTestSuiteInfo<TestSuite>* typed_test_info = nullptr;
-    for (auto& test_suite_info : test_suite_infos_) {
-      if (test_suite_info->GetTestSuiteName() == test_suite_name) {
-        if (test_suite_info->GetTestSuiteTypeId() != GetTypeId<TestSuite>()) {
-          // Complain about incorrect usage of Google Test facilities
-          // and terminate the program since we cannot guaranty correct
-          // test suite setup and tear-down in this case.
-          ReportInvalidTestSuiteType(test_suite_name, code_location);
-          posix::Abort();
-        } else {
-          // At this point we are sure that the object we found is of the same
-          // type we are looking for, so we downcast it to that type
-          // without further checks.
-          typed_test_info = CheckedDowncastToActualType<
-              ParameterizedTestSuiteInfo<TestSuite> >(test_suite_info);
-        }
-        break;
-      }
-    }
-    if (typed_test_info == nullptr) {
-      typed_test_info = new ParameterizedTestSuiteInfo<TestSuite>(
-          test_suite_name, code_location);
-      test_suite_infos_.push_back(typed_test_info);
-    }
-    return typed_test_info;
-  }
-  void RegisterTests() {
-    for (auto& test_suite_info : test_suite_infos_) {
-      test_suite_info->RegisterTests();
-    }
-  }
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  template <class TestCase>
-  ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
-      const char* test_case_name, CodeLocation code_location) {
-    return GetTestSuitePatternHolder<TestCase>(test_case_name, code_location);
-  }
-
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
- private:
-  using TestSuiteInfoContainer = ::std::vector<ParameterizedTestSuiteInfoBase*>;
-
-  TestSuiteInfoContainer test_suite_infos_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestSuiteRegistry);
-};
-
-}  // namespace internal
-
-// Forward declarations of ValuesIn(), which is implemented in
-// include/gtest/gtest-param-test.h.
-template <class Container>
-internal::ParamGenerator<typename Container::value_type> ValuesIn(
-    const Container& container);
-
-namespace internal {
-// Used in the Values() function to provide polymorphic capabilities.
-
-template <typename... Ts>
-class ValueArray {
- public:
-  ValueArray(Ts... v) : v_{std::move(v)...} {}
-
-  template <typename T>
-  operator ParamGenerator<T>() const {  // NOLINT
-    return ValuesIn(MakeVector<T>(MakeIndexSequence<sizeof...(Ts)>()));
-  }
-
- private:
-  template <typename T, size_t... I>
-  std::vector<T> MakeVector(IndexSequence<I...>) const {
-    return std::vector<T>{static_cast<T>(v_.template Get<I>())...};
-  }
-
-  FlatTuple<Ts...> v_;
-};
-
-template <typename... T>
-class CartesianProductGenerator
-    : public ParamGeneratorInterface<::std::tuple<T...>> {
- public:
-  typedef ::std::tuple<T...> ParamType;
-
-  CartesianProductGenerator(const std::tuple<ParamGenerator<T>...>& g)
-      : generators_(g) {}
-  ~CartesianProductGenerator() override {}
-
-  ParamIteratorInterface<ParamType>* Begin() const override {
-    return new Iterator(this, generators_, false);
-  }
-  ParamIteratorInterface<ParamType>* End() const override {
-    return new Iterator(this, generators_, true);
-  }
-
- private:
-  template <class I>
-  class IteratorImpl;
-  template <size_t... I>
-  class IteratorImpl<IndexSequence<I...>>
-      : public ParamIteratorInterface<ParamType> {
-   public:
-    IteratorImpl(const ParamGeneratorInterface<ParamType>* base,
-             const std::tuple<ParamGenerator<T>...>& generators, bool is_end)
-        : base_(base),
-          begin_(std::get<I>(generators).begin()...),
-          end_(std::get<I>(generators).end()...),
-          current_(is_end ? end_ : begin_) {
-      ComputeCurrentValue();
-    }
-    ~IteratorImpl() override {}
-
-    const ParamGeneratorInterface<ParamType>* BaseGenerator() const override {
-      return base_;
-    }
-    // Advance should not be called on beyond-of-range iterators
-    // so no component iterators must be beyond end of range, either.
-    void Advance() override {
-      assert(!AtEnd());
-      // Advance the last iterator.
-      ++std::get<sizeof...(T) - 1>(current_);
-      // if that reaches end, propagate that up.
-      AdvanceIfEnd<sizeof...(T) - 1>();
-      ComputeCurrentValue();
-    }
-    ParamIteratorInterface<ParamType>* Clone() const override {
-      return new IteratorImpl(*this);
-    }
-
-    const ParamType* Current() const override { return current_value_.get(); }
-
-    bool Equals(const ParamIteratorInterface<ParamType>& other) const override {
-      // Having the same base generator guarantees that the other
-      // iterator is of the same type and we can downcast.
-      GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
-          << "The program attempted to compare iterators "
-          << "from different generators." << std::endl;
-      const IteratorImpl* typed_other =
-          CheckedDowncastToActualType<const IteratorImpl>(&other);
-
-      // We must report iterators equal if they both point beyond their
-      // respective ranges. That can happen in a variety of fashions,
-      // so we have to consult AtEnd().
-      if (AtEnd() && typed_other->AtEnd()) return true;
-
-      bool same = true;
-      bool dummy[] = {
-          (same = same && std::get<I>(current_) ==
-                              std::get<I>(typed_other->current_))...};
-      (void)dummy;
-      return same;
-    }
-
-   private:
-    template <size_t ThisI>
-    void AdvanceIfEnd() {
-      if (std::get<ThisI>(current_) != std::get<ThisI>(end_)) return;
-
-      bool last = ThisI == 0;
-      if (last) {
-        // We are done. Nothing else to propagate.
-        return;
-      }
-
-      constexpr size_t NextI = ThisI - (ThisI != 0);
-      std::get<ThisI>(current_) = std::get<ThisI>(begin_);
-      ++std::get<NextI>(current_);
-      AdvanceIfEnd<NextI>();
-    }
-
-    void ComputeCurrentValue() {
-      if (!AtEnd())
-        current_value_ = std::make_shared<ParamType>(*std::get<I>(current_)...);
-    }
-    bool AtEnd() const {
-      bool at_end = false;
-      bool dummy[] = {
-          (at_end = at_end || std::get<I>(current_) == std::get<I>(end_))...};
-      (void)dummy;
-      return at_end;
-    }
-
-    const ParamGeneratorInterface<ParamType>* const base_;
-    std::tuple<typename ParamGenerator<T>::iterator...> begin_;
-    std::tuple<typename ParamGenerator<T>::iterator...> end_;
-    std::tuple<typename ParamGenerator<T>::iterator...> current_;
-    std::shared_ptr<ParamType> current_value_;
-  };
-
-  using Iterator = IteratorImpl<typename MakeIndexSequence<sizeof...(T)>::type>;
-
-  std::tuple<ParamGenerator<T>...> generators_;
-};
-
-template <class... Gen>
-class CartesianProductHolder {
- public:
-  CartesianProductHolder(const Gen&... g) : generators_(g...) {}
-  template <typename... T>
-  operator ParamGenerator<::std::tuple<T...>>() const {
-    return ParamGenerator<::std::tuple<T...>>(
-        new CartesianProductGenerator<T...>(generators_));
-  }
-
- private:
-  std::tuple<Gen...> generators_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-port-arch.h b/3rdparty/gtest/include/gtest/internal/gtest-port-arch.h
deleted file mode 100644
index cece93db..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-port-arch.h
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file defines the GTEST_OS_* macro.
-// It is separate from gtest-port.h so that custom/gtest-port.h can include it.
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
-
-// Determines the platform on which Google Test is compiled.
-#ifdef __CYGWIN__
-# define GTEST_OS_CYGWIN 1
-# elif defined(__MINGW__) || defined(__MINGW32__) || defined(__MINGW64__)
-#  define GTEST_OS_WINDOWS_MINGW 1
-#  define GTEST_OS_WINDOWS 1
-#elif defined _WIN32
-# define GTEST_OS_WINDOWS 1
-# ifdef _WIN32_WCE
-#  define GTEST_OS_WINDOWS_MOBILE 1
-# elif defined(WINAPI_FAMILY)
-#  include <winapifamily.h>
-#  if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
-#   define GTEST_OS_WINDOWS_DESKTOP 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_PHONE_APP)
-#   define GTEST_OS_WINDOWS_PHONE 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
-#   define GTEST_OS_WINDOWS_RT 1
-#  elif WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_TV_TITLE)
-#   define GTEST_OS_WINDOWS_PHONE 1
-#   define GTEST_OS_WINDOWS_TV_TITLE 1
-#  else
-    // WINAPI_FAMILY defined but no known partition matched.
-    // Default to desktop.
-#   define GTEST_OS_WINDOWS_DESKTOP 1
-#  endif
-# else
-#  define GTEST_OS_WINDOWS_DESKTOP 1
-# endif  // _WIN32_WCE
-#elif defined __OS2__
-# define GTEST_OS_OS2 1
-#elif defined __APPLE__
-# define GTEST_OS_MAC 1
-# if TARGET_OS_IPHONE
-#  define GTEST_OS_IOS 1
-# endif
-#elif defined __DragonFly__
-# define GTEST_OS_DRAGONFLY 1
-#elif defined __FreeBSD__
-# define GTEST_OS_FREEBSD 1
-#elif defined __Fuchsia__
-# define GTEST_OS_FUCHSIA 1
-#elif defined(__GLIBC__) && defined(__FreeBSD_kernel__)
-# define GTEST_OS_GNU_KFREEBSD 1
-#elif defined __linux__
-# define GTEST_OS_LINUX 1
-# if defined __ANDROID__
-#  define GTEST_OS_LINUX_ANDROID 1
-# endif
-#elif defined __MVS__
-# define GTEST_OS_ZOS 1
-#elif defined(__sun) && defined(__SVR4)
-# define GTEST_OS_SOLARIS 1
-#elif defined(_AIX)
-# define GTEST_OS_AIX 1
-#elif defined(__hpux)
-# define GTEST_OS_HPUX 1
-#elif defined __native_client__
-# define GTEST_OS_NACL 1
-#elif defined __NetBSD__
-# define GTEST_OS_NETBSD 1
-#elif defined __OpenBSD__
-# define GTEST_OS_OPENBSD 1
-#elif defined __QNX__
-# define GTEST_OS_QNX 1
-#elif defined(__HAIKU__)
-#define GTEST_OS_HAIKU 1
-#endif  // __CYGWIN__
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_ARCH_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-port.h b/3rdparty/gtest/include/gtest/internal/gtest-port.h
deleted file mode 100644
index 063fcb10..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-port.h
+++ /dev/null
@@ -1,2231 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Low-level types and utilities for porting Google Test to various
-// platforms.  All macros ending with _ and symbols defined in an
-// internal namespace are subject to change without notice.  Code
-// outside Google Test MUST NOT USE THEM DIRECTLY.  Macros that don't
-// end with _ are part of Google Test's public API and can be used by
-// code outside Google Test.
-//
-// This file is fundamental to Google Test.  All other Google Test source
-// files are expected to #include this.  Therefore, it cannot #include
-// any other Google Test header.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
-
-// Environment-describing macros
-// -----------------------------
-//
-// Google Test can be used in many different environments.  Macros in
-// this section tell Google Test what kind of environment it is being
-// used in, such that Google Test can provide environment-specific
-// features and implementations.
-//
-// Google Test tries to automatically detect the properties of its
-// environment, so users usually don't need to worry about these
-// macros.  However, the automatic detection is not perfect.
-// Sometimes it's necessary for a user to define some of the following
-// macros in the build script to override Google Test's decisions.
-//
-// If the user doesn't define a macro in the list, Google Test will
-// provide a default definition.  After this header is #included, all
-// macros in this list will be defined to either 1 or 0.
-//
-// Notes to maintainers:
-//   - Each macro here is a user-tweakable knob; do not grow the list
-//     lightly.
-//   - Use #if to key off these macros.  Don't use #ifdef or "#if
-//     defined(...)", which will not work as these macros are ALWAYS
-//     defined.
-//
-//   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
-//                              is/isn't available.
-//   GTEST_HAS_EXCEPTIONS     - Define it to 1/0 to indicate that exceptions
-//                              are enabled.
-//   GTEST_HAS_POSIX_RE       - Define it to 1/0 to indicate that POSIX regular
-//                              expressions are/aren't available.
-//   GTEST_HAS_PTHREAD        - Define it to 1/0 to indicate that <pthread.h>
-//                              is/isn't available.
-//   GTEST_HAS_RTTI           - Define it to 1/0 to indicate that RTTI is/isn't
-//                              enabled.
-//   GTEST_HAS_STD_WSTRING    - Define it to 1/0 to indicate that
-//                              std::wstring does/doesn't work (Google Test can
-//                              be used where std::wstring is unavailable).
-//   GTEST_HAS_SEH            - Define it to 1/0 to indicate whether the
-//                              compiler supports Microsoft's "Structured
-//                              Exception Handling".
-//   GTEST_HAS_STREAM_REDIRECTION
-//                            - Define it to 1/0 to indicate whether the
-//                              platform supports I/O stream redirection using
-//                              dup() and dup2().
-//   GTEST_LINKED_AS_SHARED_LIBRARY
-//                            - Define to 1 when compiling tests that use
-//                              Google Test as a shared library (known as
-//                              DLL on Windows).
-//   GTEST_CREATE_SHARED_LIBRARY
-//                            - Define to 1 when compiling Google Test itself
-//                              as a shared library.
-//   GTEST_DEFAULT_DEATH_TEST_STYLE
-//                            - The default value of --gtest_death_test_style.
-//                              The legacy default has been "fast" in the open
-//                              source version since 2008. The recommended value
-//                              is "threadsafe", and can be set in
-//                              custom/gtest-port.h.
-
-// Platform-indicating macros
-// --------------------------
-//
-// Macros indicating the platform on which Google Test is being used
-// (a macro is defined to 1 if compiled on the given platform;
-// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
-// defines these macros automatically.  Code outside Google Test MUST
-// NOT define them.
-//
-//   GTEST_OS_AIX      - IBM AIX
-//   GTEST_OS_CYGWIN   - Cygwin
-//   GTEST_OS_DRAGONFLY - DragonFlyBSD
-//   GTEST_OS_FREEBSD  - FreeBSD
-//   GTEST_OS_FUCHSIA  - Fuchsia
-//   GTEST_OS_GNU_KFREEBSD - GNU/kFreeBSD
-//   GTEST_OS_HAIKU    - Haiku
-//   GTEST_OS_HPUX     - HP-UX
-//   GTEST_OS_LINUX    - Linux
-//     GTEST_OS_LINUX_ANDROID - Google Android
-//   GTEST_OS_MAC      - Mac OS X
-//     GTEST_OS_IOS    - iOS
-//   GTEST_OS_NACL     - Google Native Client (NaCl)
-//   GTEST_OS_NETBSD   - NetBSD
-//   GTEST_OS_OPENBSD  - OpenBSD
-//   GTEST_OS_OS2      - OS/2
-//   GTEST_OS_QNX      - QNX
-//   GTEST_OS_SOLARIS  - Sun Solaris
-//   GTEST_OS_WINDOWS  - Windows (Desktop, MinGW, or Mobile)
-//     GTEST_OS_WINDOWS_DESKTOP  - Windows Desktop
-//     GTEST_OS_WINDOWS_MINGW    - MinGW
-//     GTEST_OS_WINDOWS_MOBILE   - Windows Mobile
-//     GTEST_OS_WINDOWS_PHONE    - Windows Phone
-//     GTEST_OS_WINDOWS_RT       - Windows Store App/WinRT
-//   GTEST_OS_ZOS      - z/OS
-//
-// Among the platforms, Cygwin, Linux, Mac OS X, and Windows have the
-// most stable support.  Since core members of the Google Test project
-// don't have access to other platforms, support for them may be less
-// stable.  If you notice any problems on your platform, please notify
-// googletestframework@googlegroups.com (patches for fixing them are
-// even more welcome!).
-//
-// It is possible that none of the GTEST_OS_* macros are defined.
-
-// Feature-indicating macros
-// -------------------------
-//
-// Macros indicating which Google Test features are available (a macro
-// is defined to 1 if the corresponding feature is supported;
-// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
-// defines these macros automatically.  Code outside Google Test MUST
-// NOT define them.
-//
-// These macros are public so that portable tests can be written.
-// Such tests typically surround code using a feature with an #if
-// which controls that code.  For example:
-//
-// #if GTEST_HAS_DEATH_TEST
-//   EXPECT_DEATH(DoSomethingDeadly());
-// #endif
-//
-//   GTEST_HAS_DEATH_TEST   - death tests
-//   GTEST_HAS_TYPED_TEST   - typed tests
-//   GTEST_HAS_TYPED_TEST_P - type-parameterized tests
-//   GTEST_IS_THREADSAFE    - Google Test is thread-safe.
-//   GOOGLETEST_CM0007 DO NOT DELETE
-//   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used. Do not confuse with
-//                            GTEST_HAS_POSIX_RE (see above) which users can
-//                            define themselves.
-//   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
-//                            the above RE\b(s) are mutually exclusive.
-
-// Misc public macros
-// ------------------
-//
-//   GTEST_FLAG(flag_name)  - references the variable corresponding to
-//                            the given Google Test flag.
-
-// Internal utilities
-// ------------------
-//
-// The following macros and utilities are for Google Test's INTERNAL
-// use only.  Code outside Google Test MUST NOT USE THEM DIRECTLY.
-//
-// Macros for basic C++ coding:
-//   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
-//   GTEST_ATTRIBUTE_UNUSED_  - declares that a class' instances or a
-//                              variable don't have to be used.
-//   GTEST_DISALLOW_ASSIGN_   - disables operator=.
-//   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
-//   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
-//   GTEST_INTENTIONAL_CONST_COND_PUSH_ - start code section where MSVC C4127 is
-//                                        suppressed (constant conditional).
-//   GTEST_INTENTIONAL_CONST_COND_POP_  - finish code section where MSVC C4127
-//                                        is suppressed.
-//
-// Synchronization:
-//   Mutex, MutexLock, ThreadLocal, GetThreadCount()
-//                            - synchronization primitives.
-//
-// Regular expressions:
-//   RE             - a simple regular expression class using the POSIX
-//                    Extended Regular Expression syntax on UNIX-like platforms
-//                    GOOGLETEST_CM0008 DO NOT DELETE
-//                    or a reduced regular exception syntax on other
-//                    platforms, including Windows.
-// Logging:
-//   GTEST_LOG_()   - logs messages at the specified severity level.
-//   LogToStderr()  - directs all log messages to stderr.
-//   FlushInfoLog() - flushes informational log messages.
-//
-// Stdout and stderr capturing:
-//   CaptureStdout()     - starts capturing stdout.
-//   GetCapturedStdout() - stops capturing stdout and returns the captured
-//                         string.
-//   CaptureStderr()     - starts capturing stderr.
-//   GetCapturedStderr() - stops capturing stderr and returns the captured
-//                         string.
-//
-// Integer types:
-//   TypeWithSize   - maps an integer to a int type.
-//   Int32, UInt32, Int64, UInt64, TimeInMillis
-//                  - integers of known sizes.
-//   BiggestInt     - the biggest signed integer type.
-//
-// Command-line utilities:
-//   GTEST_DECLARE_*()  - declares a flag.
-//   GTEST_DEFINE_*()   - defines a flag.
-//   GetInjectableArgvs() - returns the command line as a vector of strings.
-//
-// Environment variable utilities:
-//   GetEnv()             - gets the value of an environment variable.
-//   BoolFromGTestEnv()   - parses a bool environment variable.
-//   Int32FromGTestEnv()  - parses an Int32 environment variable.
-//   StringFromGTestEnv() - parses a string environment variable.
-//
-// Deprecation warnings:
-//   GTEST_INTERNAL_DEPRECATED(message) - attribute marking a function as
-//                                        deprecated; calling a marked function
-//                                        should generate a compiler warning
-
-#include <ctype.h>   // for isspace, etc
-#include <stddef.h>  // for ptrdiff_t
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <memory>
-#include <type_traits>
-
-#ifndef _WIN32_WCE
-# include <sys/types.h>
-# include <sys/stat.h>
-#endif  // !_WIN32_WCE
-
-#if defined __APPLE__
-# include <AvailabilityMacros.h>
-# include <TargetConditionals.h>
-#endif
-
-#include <algorithm>  // NOLINT
-#include <iostream>   // NOLINT
-#include <sstream>    // NOLINT
-#include <string>     // NOLINT
-#include <tuple>
-#include <utility>
-#include <vector>  // NOLINT
-
-#include "gtest/internal/gtest-port-arch.h"
-#include "gtest/internal/custom/gtest-port.h"
-
-#if !defined(GTEST_DEV_EMAIL_)
-# define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
-# define GTEST_FLAG_PREFIX_ "gtest_"
-# define GTEST_FLAG_PREFIX_DASH_ "gtest-"
-# define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
-# define GTEST_NAME_ "Google Test"
-# define GTEST_PROJECT_URL_ "https://github.com/google/googletest/"
-#endif  // !defined(GTEST_DEV_EMAIL_)
-
-#if !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
-# define GTEST_INIT_GOOGLE_TEST_NAME_ "testing::InitGoogleTest"
-#endif  // !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
-
-// Determines the version of gcc that is used to compile this.
-#ifdef __GNUC__
-// 40302 means version 4.3.2.
-# define GTEST_GCC_VER_ \
-    (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
-#endif  // __GNUC__
-
-// Macros for disabling Microsoft Visual C++ warnings.
-//
-//   GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 4385)
-//   /* code that triggers warnings C4800 and C4385 */
-//   GTEST_DISABLE_MSC_WARNINGS_POP_()
-#if defined(_MSC_VER)
-# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings) \
-    __pragma(warning(push))                        \
-    __pragma(warning(disable: warnings))
-# define GTEST_DISABLE_MSC_WARNINGS_POP_()          \
-    __pragma(warning(pop))
-#else
-// Not all compilers are MSVC
-# define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings)
-# define GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-// Clang on Windows does not understand MSVC's pragma warning.
-// We need clang-specific way to disable function deprecation warning.
-#ifdef __clang__
-# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_()                         \
-    _Pragma("clang diagnostic push")                                  \
-    _Pragma("clang diagnostic ignored \"-Wdeprecated-declarations\"") \
-    _Pragma("clang diagnostic ignored \"-Wdeprecated-implementations\"")
-#define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
-    _Pragma("clang diagnostic pop")
-#else
-# define GTEST_DISABLE_MSC_DEPRECATED_PUSH_() \
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996)
-# define GTEST_DISABLE_MSC_DEPRECATED_POP_() \
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-#endif
-
-// Brings in definitions for functions used in the testing::internal::posix
-// namespace (read, write, close, chdir, isatty, stat). We do not currently
-// use them on Windows Mobile.
-#if GTEST_OS_WINDOWS
-# if !GTEST_OS_WINDOWS_MOBILE
-#  include <direct.h>
-#  include <io.h>
-# endif
-// In order to avoid having to include <windows.h>, use forward declaration
-#if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
-// MinGW defined _CRITICAL_SECTION and _RTL_CRITICAL_SECTION as two
-// separate (equivalent) structs, instead of using typedef
-typedef struct _CRITICAL_SECTION GTEST_CRITICAL_SECTION;
-#else
-// Assume CRITICAL_SECTION is a typedef of _RTL_CRITICAL_SECTION.
-// This assumption is verified by
-// WindowsTypesTest.CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION.
-typedef struct _RTL_CRITICAL_SECTION GTEST_CRITICAL_SECTION;
-#endif
-#else
-// This assumes that non-Windows OSes provide unistd.h. For OSes where this
-// is not the case, we need to include headers that provide the functions
-// mentioned above.
-# include <unistd.h>
-# include <strings.h>
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_LINUX_ANDROID
-// Used to define __ANDROID_API__ matching the target NDK API level.
-#  include <android/api-level.h>  // NOLINT
-#endif
-
-// Defines this to true if and only if Google Test can use POSIX regular
-// expressions.
-#ifndef GTEST_HAS_POSIX_RE
-# if GTEST_OS_LINUX_ANDROID
-// On Android, <regex.h> is only available starting with Gingerbread.
-#  define GTEST_HAS_POSIX_RE (__ANDROID_API__ >= 9)
-# else
-#  define GTEST_HAS_POSIX_RE (!GTEST_OS_WINDOWS)
-# endif
-#endif
-
-#if GTEST_USES_PCRE
-// The appropriate headers have already been included.
-
-#elif GTEST_HAS_POSIX_RE
-
-// On some platforms, <regex.h> needs someone to define size_t, and
-// won't compile otherwise.  We can #include it here as we already
-// included <stdlib.h>, which is guaranteed to define size_t through
-// <stddef.h>.
-# include <regex.h>  // NOLINT
-
-# define GTEST_USES_POSIX_RE 1
-
-#elif GTEST_OS_WINDOWS
-
-// <regex.h> is not available on Windows.  Use our own simple regex
-// implementation instead.
-# define GTEST_USES_SIMPLE_RE 1
-
-#else
-
-// <regex.h> may not be available on this platform.  Use our own
-// simple regex implementation instead.
-# define GTEST_USES_SIMPLE_RE 1
-
-#endif  // GTEST_USES_PCRE
-
-#ifndef GTEST_HAS_EXCEPTIONS
-// The user didn't tell us whether exceptions are enabled, so we need
-// to figure it out.
-# if defined(_MSC_VER) && defined(_CPPUNWIND)
-// MSVC defines _CPPUNWIND to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__BORLANDC__)
-// C++Builder's implementation of the STL uses the _HAS_EXCEPTIONS
-// macro to enable exceptions, so we'll do the same.
-// Assumes that exceptions are enabled by default.
-#  ifndef _HAS_EXCEPTIONS
-#   define _HAS_EXCEPTIONS 1
-#  endif  // _HAS_EXCEPTIONS
-#  define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
-# elif defined(__clang__)
-// clang defines __EXCEPTIONS if and only if exceptions are enabled before clang
-// 220714, but if and only if cleanups are enabled after that. In Obj-C++ files,
-// there can be cleanups for ObjC exceptions which also need cleanups, even if
-// C++ exceptions are disabled. clang has __has_feature(cxx_exceptions) which
-// checks for C++ exceptions starting at clang r206352, but which checked for
-// cleanups prior to that. To reliably check for C++ exception availability with
-// clang, check for
-// __EXCEPTIONS && __has_feature(cxx_exceptions).
-#  define GTEST_HAS_EXCEPTIONS (__EXCEPTIONS && __has_feature(cxx_exceptions))
-# elif defined(__GNUC__) && __EXCEPTIONS
-// gcc defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__SUNPRO_CC)
-// Sun Pro CC supports exceptions.  However, there is no compile-time way of
-// detecting whether they are enabled or not.  Therefore, we assume that
-// they are enabled unless the user tells us otherwise.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__IBMCPP__) && __EXCEPTIONS
-// xlC defines __EXCEPTIONS to 1 if and only if exceptions are enabled.
-#  define GTEST_HAS_EXCEPTIONS 1
-# elif defined(__HP_aCC)
-// Exception handling is in effect by default in HP aCC compiler. It has to
-// be turned of by +noeh compiler option if desired.
-#  define GTEST_HAS_EXCEPTIONS 1
-# else
-// For other compilers, we assume exceptions are disabled to be
-// conservative.
-#  define GTEST_HAS_EXCEPTIONS 0
-# endif  // defined(_MSC_VER) || defined(__BORLANDC__)
-#endif  // GTEST_HAS_EXCEPTIONS
-
-#if !defined(GTEST_HAS_STD_STRING)
-// Even though we don't use this macro any longer, we keep it in case
-// some clients still depend on it.
-# define GTEST_HAS_STD_STRING 1
-#elif !GTEST_HAS_STD_STRING
-// The user told us that ::std::string isn't available.
-# error "::std::string isn't available."
-#endif  // !defined(GTEST_HAS_STD_STRING)
-
-#ifndef GTEST_HAS_STD_WSTRING
-// The user didn't tell us whether ::std::wstring is available, so we need
-// to figure it out.
-// Cygwin 1.7 and below doesn't support ::std::wstring.
-// Solaris' libc++ doesn't support it either.  Android has
-// no support for it at least as recent as Froyo (2.2).
-#define GTEST_HAS_STD_WSTRING                                         \
-  (!(GTEST_OS_LINUX_ANDROID || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || \
-     GTEST_OS_HAIKU))
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Determines whether RTTI is available.
-#ifndef GTEST_HAS_RTTI
-// The user didn't tell us whether RTTI is enabled, so we need to
-// figure it out.
-
-# ifdef _MSC_VER
-
-#ifdef _CPPRTTI  // MSVC defines this macro if and only if RTTI is enabled.
-#   define GTEST_HAS_RTTI 1
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif
-
-// Starting with version 4.3.2, gcc defines __GXX_RTTI if and only if RTTI is
-// enabled.
-# elif defined(__GNUC__)
-
-#  ifdef __GXX_RTTI
-// When building against STLport with the Android NDK and with
-// -frtti -fno-exceptions, the build fails at link time with undefined
-// references to __cxa_bad_typeid. Note sure if STL or toolchain bug,
-// so disable RTTI when detected.
-#   if GTEST_OS_LINUX_ANDROID && defined(_STLPORT_MAJOR) && \
-       !defined(__EXCEPTIONS)
-#    define GTEST_HAS_RTTI 0
-#   else
-#    define GTEST_HAS_RTTI 1
-#   endif  // GTEST_OS_LINUX_ANDROID && __STLPORT_MAJOR && !__EXCEPTIONS
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif  // __GXX_RTTI
-
-// Clang defines __GXX_RTTI starting with version 3.0, but its manual recommends
-// using has_feature instead. has_feature(cxx_rtti) is supported since 2.7, the
-// first version with C++ support.
-# elif defined(__clang__)
-
-#  define GTEST_HAS_RTTI __has_feature(cxx_rtti)
-
-// Starting with version 9.0 IBM Visual Age defines __RTTI_ALL__ to 1 if
-// both the typeid and dynamic_cast features are present.
-# elif defined(__IBMCPP__) && (__IBMCPP__ >= 900)
-
-#  ifdef __RTTI_ALL__
-#   define GTEST_HAS_RTTI 1
-#  else
-#   define GTEST_HAS_RTTI 0
-#  endif
-
-# else
-
-// For all other compilers, we assume RTTI is enabled.
-#  define GTEST_HAS_RTTI 1
-
-# endif  // _MSC_VER
-
-#endif  // GTEST_HAS_RTTI
-
-// It's this header's responsibility to #include <typeinfo> when RTTI
-// is enabled.
-#if GTEST_HAS_RTTI
-# include <typeinfo>
-#endif
-
-// Determines whether Google Test can use the pthreads library.
-#ifndef GTEST_HAS_PTHREAD
-// The user didn't tell us explicitly, so we make reasonable assumptions about
-// which platforms have pthreads support.
-//
-// To disable threading support in Google Test, add -DGTEST_HAS_PTHREAD=0
-// to your compiler flags.
-#define GTEST_HAS_PTHREAD                                                      \
-  (GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_HPUX || GTEST_OS_QNX ||          \
-   GTEST_OS_FREEBSD || GTEST_OS_NACL || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA || \
-   GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_OPENBSD ||          \
-   GTEST_OS_HAIKU)
-#endif  // GTEST_HAS_PTHREAD
-
-#if GTEST_HAS_PTHREAD
-// gtest-port.h guarantees to #include <pthread.h> when GTEST_HAS_PTHREAD is
-// true.
-# include <pthread.h>  // NOLINT
-
-// For timespec and nanosleep, used below.
-# include <time.h>  // NOLINT
-#endif
-
-// Determines whether clone(2) is supported.
-// Usually it will only be available on Linux, excluding
-// Linux on the Itanium architecture.
-// Also see http://linux.die.net/man/2/clone.
-#ifndef GTEST_HAS_CLONE
-// The user didn't tell us, so we need to figure it out.
-
-# if GTEST_OS_LINUX && !defined(__ia64__)
-#  if GTEST_OS_LINUX_ANDROID
-// On Android, clone() became available at different API levels for each 32-bit
-// architecture.
-#    if defined(__LP64__) || \
-        (defined(__arm__) && __ANDROID_API__ >= 9) || \
-        (defined(__mips__) && __ANDROID_API__ >= 12) || \
-        (defined(__i386__) && __ANDROID_API__ >= 17)
-#     define GTEST_HAS_CLONE 1
-#    else
-#     define GTEST_HAS_CLONE 0
-#    endif
-#  else
-#   define GTEST_HAS_CLONE 1
-#  endif
-# else
-#  define GTEST_HAS_CLONE 0
-# endif  // GTEST_OS_LINUX && !defined(__ia64__)
-
-#endif  // GTEST_HAS_CLONE
-
-// Determines whether to support stream redirection. This is used to test
-// output correctness and to implement death tests.
-#ifndef GTEST_HAS_STREAM_REDIRECTION
-// By default, we assume that stream redirection is supported on all
-// platforms except known mobile ones.
-# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT
-#  define GTEST_HAS_STREAM_REDIRECTION 0
-# else
-#  define GTEST_HAS_STREAM_REDIRECTION 1
-# endif  // !GTEST_OS_WINDOWS_MOBILE
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-// Determines whether to support death tests.
-// pops up a dialog window that cannot be suppressed programmatically.
-#if (GTEST_OS_LINUX || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS ||             \
-     (GTEST_OS_MAC && !GTEST_OS_IOS) ||                                   \
-     (GTEST_OS_WINDOWS_DESKTOP && _MSC_VER) || GTEST_OS_WINDOWS_MINGW ||  \
-     GTEST_OS_AIX || GTEST_OS_HPUX || GTEST_OS_OPENBSD || GTEST_OS_QNX || \
-     GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_FUCHSIA ||           \
-     GTEST_OS_DRAGONFLY || GTEST_OS_GNU_KFREEBSD || GTEST_OS_HAIKU)
-# define GTEST_HAS_DEATH_TEST 1
-#endif
-
-// Determines whether to support type-driven tests.
-
-// Typed tests need <typeinfo> and variadic macros, which GCC, VC++ 8.0,
-// Sun Pro CC, IBM Visual Age, and HP aCC support.
-#if defined(__GNUC__) || defined(_MSC_VER) || defined(__SUNPRO_CC) || \
-    defined(__IBMCPP__) || defined(__HP_aCC)
-# define GTEST_HAS_TYPED_TEST 1
-# define GTEST_HAS_TYPED_TEST_P 1
-#endif
-
-// Determines whether the system compiler uses UTF-16 for encoding wide strings.
-#define GTEST_WIDE_STRING_USES_UTF16_ \
-  (GTEST_OS_WINDOWS || GTEST_OS_CYGWIN || GTEST_OS_AIX || GTEST_OS_OS2)
-
-// Determines whether test results can be streamed to a socket.
-#if GTEST_OS_LINUX || GTEST_OS_GNU_KFREEBSD || GTEST_OS_DRAGONFLY || \
-    GTEST_OS_FREEBSD || GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-# define GTEST_CAN_STREAM_RESULTS_ 1
-#endif
-
-// Defines some utility macros.
-
-// The GNU compiler emits a warning if nested "if" statements are followed by
-// an "else" statement and braces are not used to explicitly disambiguate the
-// "else" binding.  This leads to problems with code like:
-//
-//   if (gate)
-//     ASSERT_*(condition) << "Some message";
-//
-// The "switch (0) case 0:" idiom is used to suppress this.
-#ifdef __INTEL_COMPILER
-# define GTEST_AMBIGUOUS_ELSE_BLOCKER_
-#else
-# define GTEST_AMBIGUOUS_ELSE_BLOCKER_ switch (0) case 0: default:  // NOLINT
-#endif
-
-// Use this annotation at the end of a struct/class definition to
-// prevent the compiler from optimizing away instances that are never
-// used.  This is useful when all interesting logic happens inside the
-// c'tor and / or d'tor.  Example:
-//
-//   struct Foo {
-//     Foo() { ... }
-//   } GTEST_ATTRIBUTE_UNUSED_;
-//
-// Also use it after a variable or parameter declaration to tell the
-// compiler the variable/parameter does not have to be used.
-#if defined(__GNUC__) && !defined(COMPILER_ICC)
-# define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-#elif defined(__clang__)
-# if __has_attribute(unused)
-#  define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
-# endif
-#endif
-#ifndef GTEST_ATTRIBUTE_UNUSED_
-# define GTEST_ATTRIBUTE_UNUSED_
-#endif
-
-// Use this annotation before a function that takes a printf format string.
-#if (defined(__GNUC__) || defined(__clang__)) && !defined(COMPILER_ICC)
-# if defined(__MINGW_PRINTF_FORMAT)
-// MinGW has two different printf implementations. Ensure the format macro
-// matches the selected implementation. See
-// https://sourceforge.net/p/mingw-w64/wiki2/gnu%20printf/.
-#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
-       __attribute__((__format__(__MINGW_PRINTF_FORMAT, string_index, \
-                                 first_to_check)))
-# else
-#  define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check) \
-       __attribute__((__format__(__printf__, string_index, first_to_check)))
-# endif
-#else
-# define GTEST_ATTRIBUTE_PRINTF_(string_index, first_to_check)
-#endif
-
-
-// A macro to disallow operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_ASSIGN_(type) \
-  void operator=(type const &) = delete
-
-// A macro to disallow copy constructor and operator=
-// This should be used in the private: declarations for a class.
-#define GTEST_DISALLOW_COPY_AND_ASSIGN_(type) \
-  type(type const &) = delete; \
-  GTEST_DISALLOW_ASSIGN_(type)
-
-// Tell the compiler to warn about unused return values for functions declared
-// with this macro.  The macro should be used on function declarations
-// following the argument list:
-//
-//   Sprocket* AllocateSprocket() GTEST_MUST_USE_RESULT_;
-#if defined(__GNUC__) && !defined(COMPILER_ICC)
-# define GTEST_MUST_USE_RESULT_ __attribute__ ((warn_unused_result))
-#else
-# define GTEST_MUST_USE_RESULT_
-#endif  // __GNUC__ && !COMPILER_ICC
-
-// MS C++ compiler emits warning when a conditional expression is compile time
-// constant. In some contexts this warning is false positive and needs to be
-// suppressed. Use the following two macros in such cases:
-//
-// GTEST_INTENTIONAL_CONST_COND_PUSH_()
-// while (true) {
-// GTEST_INTENTIONAL_CONST_COND_POP_()
-// }
-# define GTEST_INTENTIONAL_CONST_COND_PUSH_() \
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127)
-# define GTEST_INTENTIONAL_CONST_COND_POP_() \
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-
-// Determine whether the compiler supports Microsoft's Structured Exception
-// Handling.  This is supported by several Windows compilers but generally
-// does not exist on any other system.
-#ifndef GTEST_HAS_SEH
-// The user didn't tell us, so we need to figure it out.
-
-# if defined(_MSC_VER) || defined(__BORLANDC__)
-// These two compilers are known to support SEH.
-#  define GTEST_HAS_SEH 1
-# else
-// Assume no SEH.
-#  define GTEST_HAS_SEH 0
-# endif
-
-#endif  // GTEST_HAS_SEH
-
-#ifndef GTEST_IS_THREADSAFE
-
-#define GTEST_IS_THREADSAFE                                                 \
-  (GTEST_HAS_MUTEX_AND_THREAD_LOCAL_ ||                                     \
-   (GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT) || \
-   GTEST_HAS_PTHREAD)
-
-#endif  // GTEST_IS_THREADSAFE
-
-// GTEST_API_ qualifies all symbols that must be exported. The definitions below
-// are guarded by #ifndef to give embedders a chance to define GTEST_API_ in
-// gtest/internal/custom/gtest-port.h
-#ifndef GTEST_API_
-
-#ifdef _MSC_VER
-# if GTEST_LINKED_AS_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllimport)
-# elif GTEST_CREATE_SHARED_LIBRARY
-#  define GTEST_API_ __declspec(dllexport)
-# endif
-#elif __GNUC__ >= 4 || defined(__clang__)
-# define GTEST_API_ __attribute__((visibility ("default")))
-#endif  // _MSC_VER
-
-#endif  // GTEST_API_
-
-#ifndef GTEST_API_
-# define GTEST_API_
-#endif  // GTEST_API_
-
-#ifndef GTEST_DEFAULT_DEATH_TEST_STYLE
-# define GTEST_DEFAULT_DEATH_TEST_STYLE  "fast"
-#endif  // GTEST_DEFAULT_DEATH_TEST_STYLE
-
-#ifdef __GNUC__
-// Ask the compiler to never inline a given function.
-# define GTEST_NO_INLINE_ __attribute__((noinline))
-#else
-# define GTEST_NO_INLINE_
-#endif
-
-// _LIBCPP_VERSION is defined by the libc++ library from the LLVM project.
-#if !defined(GTEST_HAS_CXXABI_H_)
-# if defined(__GLIBCXX__) || (defined(_LIBCPP_VERSION) && !defined(_MSC_VER))
-#  define GTEST_HAS_CXXABI_H_ 1
-# else
-#  define GTEST_HAS_CXXABI_H_ 0
-# endif
-#endif
-
-// A function level attribute to disable checking for use of uninitialized
-// memory when built with MemorySanitizer.
-#if defined(__clang__)
-# if __has_feature(memory_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_ \
-       __attribute__((no_sanitize_memory))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-# endif  // __has_feature(memory_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-#endif  // __clang__
-
-// A function level attribute to disable AddressSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(address_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_ \
-       __attribute__((no_sanitize_address))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-# endif  // __has_feature(address_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-#endif  // __clang__
-
-// A function level attribute to disable HWAddressSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(hwaddress_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_ \
-       __attribute__((no_sanitize("hwaddress")))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-# endif  // __has_feature(hwaddress_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-#endif  // __clang__
-
-// A function level attribute to disable ThreadSanitizer instrumentation.
-#if defined(__clang__)
-# if __has_feature(thread_sanitizer)
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_ \
-       __attribute__((no_sanitize_thread))
-# else
-#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-# endif  // __has_feature(thread_sanitizer)
-#else
-# define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-#endif  // __clang__
-
-namespace testing {
-
-class Message;
-
-// Legacy imports for backwards compatibility.
-// New code should use std:: names directly.
-using std::get;
-using std::make_tuple;
-using std::tuple;
-using std::tuple_element;
-using std::tuple_size;
-
-namespace internal {
-
-// A secret type that Google Test users don't know about.  It has no
-// definition on purpose.  Therefore it's impossible to create a
-// Secret object, which is what we want.
-class Secret;
-
-// The GTEST_COMPILE_ASSERT_ is a legacy macro used to verify that a compile
-// time expression is true (in new code, use static_assert instead). For
-// example, you could use it to verify the size of a static array:
-//
-//   GTEST_COMPILE_ASSERT_(GTEST_ARRAY_SIZE_(names) == NUM_NAMES,
-//                         names_incorrect_size);
-//
-// The second argument to the macro must be a valid C++ identifier. If the
-// expression is false, compiler will issue an error containing this identifier.
-#define GTEST_COMPILE_ASSERT_(expr, msg) static_assert(expr, #msg)
-
-// Evaluates to the number of elements in 'array'.
-#define GTEST_ARRAY_SIZE_(array) (sizeof(array) / sizeof(array[0]))
-
-// A helper for suppressing warnings on constant condition.  It just
-// returns 'condition'.
-GTEST_API_ bool IsTrue(bool condition);
-
-// Defines RE.
-
-#if GTEST_USES_PCRE
-// if used, PCRE is injected by custom/gtest-port.h
-#elif GTEST_USES_POSIX_RE || GTEST_USES_SIMPLE_RE
-
-// A simple C++ wrapper for <regex.h>.  It uses the POSIX Extended
-// Regular Expression syntax.
-class GTEST_API_ RE {
- public:
-  // A copy constructor is required by the Standard to initialize object
-  // references from r-values.
-  RE(const RE& other) { Init(other.pattern()); }
-
-  // Constructs an RE from a string.
-  RE(const ::std::string& regex) { Init(regex.c_str()); }  // NOLINT
-
-  RE(const char* regex) { Init(regex); }  // NOLINT
-  ~RE();
-
-  // Returns the string representation of the regex.
-  const char* pattern() const { return pattern_; }
-
-  // FullMatch(str, re) returns true if and only if regular expression re
-  // matches the entire str.
-  // PartialMatch(str, re) returns true if and only if regular expression re
-  // matches a substring of str (including str itself).
-  static bool FullMatch(const ::std::string& str, const RE& re) {
-    return FullMatch(str.c_str(), re);
-  }
-  static bool PartialMatch(const ::std::string& str, const RE& re) {
-    return PartialMatch(str.c_str(), re);
-  }
-
-  static bool FullMatch(const char* str, const RE& re);
-  static bool PartialMatch(const char* str, const RE& re);
-
- private:
-  void Init(const char* regex);
-  const char* pattern_;
-  bool is_valid_;
-
-# if GTEST_USES_POSIX_RE
-
-  regex_t full_regex_;     // For FullMatch().
-  regex_t partial_regex_;  // For PartialMatch().
-
-# else  // GTEST_USES_SIMPLE_RE
-
-  const char* full_pattern_;  // For FullMatch();
-
-# endif
-
-  GTEST_DISALLOW_ASSIGN_(RE);
-};
-
-#endif  // GTEST_USES_PCRE
-
-// Formats a source file path and a line number as they would appear
-// in an error message from the compiler used to compile this code.
-GTEST_API_ ::std::string FormatFileLocation(const char* file, int line);
-
-// Formats a file location for compiler-independent XML output.
-// Although this function is not platform dependent, we put it next to
-// FormatFileLocation in order to contrast the two functions.
-GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(const char* file,
-                                                               int line);
-
-// Defines logging utilities:
-//   GTEST_LOG_(severity) - logs messages at the specified severity level. The
-//                          message itself is streamed into the macro.
-//   LogToStderr()  - directs all log messages to stderr.
-//   FlushInfoLog() - flushes informational log messages.
-
-enum GTestLogSeverity {
-  GTEST_INFO,
-  GTEST_WARNING,
-  GTEST_ERROR,
-  GTEST_FATAL
-};
-
-// Formats log entry severity, provides a stream object for streaming the
-// log message, and terminates the message with a newline when going out of
-// scope.
-class GTEST_API_ GTestLog {
- public:
-  GTestLog(GTestLogSeverity severity, const char* file, int line);
-
-  // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
-  ~GTestLog();
-
-  ::std::ostream& GetStream() { return ::std::cerr; }
-
- private:
-  const GTestLogSeverity severity_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestLog);
-};
-
-#if !defined(GTEST_LOG_)
-
-# define GTEST_LOG_(severity) \
-    ::testing::internal::GTestLog(::testing::internal::GTEST_##severity, \
-                                  __FILE__, __LINE__).GetStream()
-
-inline void LogToStderr() {}
-inline void FlushInfoLog() { fflush(nullptr); }
-
-#endif  // !defined(GTEST_LOG_)
-
-#if !defined(GTEST_CHECK_)
-// INTERNAL IMPLEMENTATION - DO NOT USE.
-//
-// GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
-// is not satisfied.
-//  Synopsys:
-//    GTEST_CHECK_(boolean_condition);
-//     or
-//    GTEST_CHECK_(boolean_condition) << "Additional message";
-//
-//    This checks the condition and if the condition is not satisfied
-//    it prints message about the condition violation, including the
-//    condition itself, plus additional message streamed into it, if any,
-//    and then it aborts the program. It aborts the program irrespective of
-//    whether it is built in the debug mode or not.
-# define GTEST_CHECK_(condition) \
-    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
-    if (::testing::internal::IsTrue(condition)) \
-      ; \
-    else \
-      GTEST_LOG_(FATAL) << "Condition " #condition " failed. "
-#endif  // !defined(GTEST_CHECK_)
-
-// An all-mode assert to verify that the given POSIX-style function
-// call returns 0 (indicating success).  Known limitation: this
-// doesn't expand to a balanced 'if' statement, so enclose the macro
-// in {} if you need to use it as the only statement in an 'if'
-// branch.
-#define GTEST_CHECK_POSIX_SUCCESS_(posix_call) \
-  if (const int gtest_error = (posix_call)) \
-    GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
-                      << gtest_error
-
-// Transforms "T" into "const T&" according to standard reference collapsing
-// rules (this is only needed as a backport for C++98 compilers that do not
-// support reference collapsing). Specifically, it transforms:
-//
-//   char         ==> const char&
-//   const char   ==> const char&
-//   char&        ==> char&
-//   const char&  ==> const char&
-//
-// Note that the non-const reference will not have "const" added. This is
-// standard, and necessary so that "T" can always bind to "const T&".
-template <typename T>
-struct ConstRef { typedef const T& type; };
-template <typename T>
-struct ConstRef<T&> { typedef T& type; };
-
-// The argument T must depend on some template parameters.
-#define GTEST_REFERENCE_TO_CONST_(T) \
-  typename ::testing::internal::ConstRef<T>::type
-
-// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
-//
-// Use ImplicitCast_ as a safe version of static_cast for upcasting in
-// the type hierarchy (e.g. casting a Foo* to a SuperclassOfFoo* or a
-// const Foo*).  When you use ImplicitCast_, the compiler checks that
-// the cast is safe.  Such explicit ImplicitCast_s are necessary in
-// surprisingly many situations where C++ demands an exact type match
-// instead of an argument type convertable to a target type.
-//
-// The syntax for using ImplicitCast_ is the same as for static_cast:
-//
-//   ImplicitCast_<ToType>(expr)
-//
-// ImplicitCast_ would have been part of the C++ standard library,
-// but the proposal was submitted too late.  It will probably make
-// its way into the language in the future.
-//
-// This relatively ugly name is intentional. It prevents clashes with
-// similar functions users may have (e.g., implicit_cast). The internal
-// namespace alone is not enough because the function can be found by ADL.
-template<typename To>
-inline To ImplicitCast_(To x) { return x; }
-
-// When you upcast (that is, cast a pointer from type Foo to type
-// SuperclassOfFoo), it's fine to use ImplicitCast_<>, since upcasts
-// always succeed.  When you downcast (that is, cast a pointer from
-// type Foo to type SubclassOfFoo), static_cast<> isn't safe, because
-// how do you know the pointer is really of type SubclassOfFoo?  It
-// could be a bare Foo, or of type DifferentSubclassOfFoo.  Thus,
-// when you downcast, you should use this macro.  In debug mode, we
-// use dynamic_cast<> to double-check the downcast is legal (we die
-// if it's not).  In normal mode, we do the efficient static_cast<>
-// instead.  Thus, it's important to test in debug mode to make sure
-// the cast is legal!
-//    This is the only place in the code we should use dynamic_cast<>.
-// In particular, you SHOULDN'T be using dynamic_cast<> in order to
-// do RTTI (eg code like this:
-//    if (dynamic_cast<Subclass1>(foo)) HandleASubclass1Object(foo);
-//    if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
-// You should design the code some other way not to need this.
-//
-// This relatively ugly name is intentional. It prevents clashes with
-// similar functions users may have (e.g., down_cast). The internal
-// namespace alone is not enough because the function can be found by ADL.
-template<typename To, typename From>  // use like this: DownCast_<T*>(foo);
-inline To DownCast_(From* f) {  // so we only accept pointers
-  // Ensures that To is a sub-type of From *.  This test is here only
-  // for compile-time type checking, and has no overhead in an
-  // optimized build at run-time, as it will be optimized away
-  // completely.
-  GTEST_INTENTIONAL_CONST_COND_PUSH_()
-  if (false) {
-  GTEST_INTENTIONAL_CONST_COND_POP_()
-  const To to = nullptr;
-  ::testing::internal::ImplicitCast_<From*>(to);
-  }
-
-#if GTEST_HAS_RTTI
-  // RTTI: debug mode only!
-  GTEST_CHECK_(f == nullptr || dynamic_cast<To>(f) != nullptr);
-#endif
-  return static_cast<To>(f);
-}
-
-// Downcasts the pointer of type Base to Derived.
-// Derived must be a subclass of Base. The parameter MUST
-// point to a class of type Derived, not any subclass of it.
-// When RTTI is available, the function performs a runtime
-// check to enforce this.
-template <class Derived, class Base>
-Derived* CheckedDowncastToActualType(Base* base) {
-#if GTEST_HAS_RTTI
-  GTEST_CHECK_(typeid(*base) == typeid(Derived));
-#endif
-
-#if GTEST_HAS_DOWNCAST_
-  return ::down_cast<Derived*>(base);
-#elif GTEST_HAS_RTTI
-  return dynamic_cast<Derived*>(base);  // NOLINT
-#else
-  return static_cast<Derived*>(base);  // Poor man's downcast.
-#endif
-}
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Defines the stderr capturer:
-//   CaptureStdout     - starts capturing stdout.
-//   GetCapturedStdout - stops capturing stdout and returns the captured string.
-//   CaptureStderr     - starts capturing stderr.
-//   GetCapturedStderr - stops capturing stderr and returns the captured string.
-//
-GTEST_API_ void CaptureStdout();
-GTEST_API_ std::string GetCapturedStdout();
-GTEST_API_ void CaptureStderr();
-GTEST_API_ std::string GetCapturedStderr();
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-// Returns the size (in bytes) of a file.
-GTEST_API_ size_t GetFileSize(FILE* file);
-
-// Reads the entire content of a file as a string.
-GTEST_API_ std::string ReadEntireFile(FILE* file);
-
-// All command line arguments.
-GTEST_API_ std::vector<std::string> GetArgvs();
-
-#if GTEST_HAS_DEATH_TEST
-
-std::vector<std::string> GetInjectableArgvs();
-// Deprecated: pass the args vector by value instead.
-void SetInjectableArgvs(const std::vector<std::string>* new_argvs);
-void SetInjectableArgvs(const std::vector<std::string>& new_argvs);
-void ClearInjectableArgvs();
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Defines synchronization primitives.
-#if GTEST_IS_THREADSAFE
-# if GTEST_HAS_PTHREAD
-// Sleeps for (roughly) n milliseconds.  This function is only for testing
-// Google Test's own constructs.  Don't use it in user tests, either
-// directly or indirectly.
-inline void SleepMilliseconds(int n) {
-  const timespec time = {
-    0,                  // 0 seconds.
-    n * 1000L * 1000L,  // And n ms.
-  };
-  nanosleep(&time, nullptr);
-}
-# endif  // GTEST_HAS_PTHREAD
-
-# if GTEST_HAS_NOTIFICATION_
-// Notification has already been imported into the namespace.
-// Nothing to do here.
-
-# elif GTEST_HAS_PTHREAD
-// Allows a controller thread to pause execution of newly created
-// threads until notified.  Instances of this class must be created
-// and destroyed in the controller thread.
-//
-// This class is only for testing Google Test's own constructs. Do not
-// use it in user tests, either directly or indirectly.
-class Notification {
- public:
-  Notification() : notified_(false) {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
-  }
-  ~Notification() {
-    pthread_mutex_destroy(&mutex_);
-  }
-
-  // Notifies all threads created with this notification to start. Must
-  // be called from the controller thread.
-  void Notify() {
-    pthread_mutex_lock(&mutex_);
-    notified_ = true;
-    pthread_mutex_unlock(&mutex_);
-  }
-
-  // Blocks until the controller thread notifies. Must be called from a test
-  // thread.
-  void WaitForNotification() {
-    for (;;) {
-      pthread_mutex_lock(&mutex_);
-      const bool notified = notified_;
-      pthread_mutex_unlock(&mutex_);
-      if (notified)
-        break;
-      SleepMilliseconds(10);
-    }
-  }
-
- private:
-  pthread_mutex_t mutex_;
-  bool notified_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
-};
-
-# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-
-GTEST_API_ void SleepMilliseconds(int n);
-
-// Provides leak-safe Windows kernel handle ownership.
-// Used in death tests and in threading support.
-class GTEST_API_ AutoHandle {
- public:
-  // Assume that Win32 HANDLE type is equivalent to void*. Doing so allows us to
-  // avoid including <windows.h> in this header file. Including <windows.h> is
-  // undesirable because it defines a lot of symbols and macros that tend to
-  // conflict with client code. This assumption is verified by
-  // WindowsTypesTest.HANDLEIsVoidStar.
-  typedef void* Handle;
-  AutoHandle();
-  explicit AutoHandle(Handle handle);
-
-  ~AutoHandle();
-
-  Handle Get() const;
-  void Reset();
-  void Reset(Handle handle);
-
- private:
-  // Returns true if and only if the handle is a valid handle object that can be
-  // closed.
-  bool IsCloseable() const;
-
-  Handle handle_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(AutoHandle);
-};
-
-// Allows a controller thread to pause execution of newly created
-// threads until notified.  Instances of this class must be created
-// and destroyed in the controller thread.
-//
-// This class is only for testing Google Test's own constructs. Do not
-// use it in user tests, either directly or indirectly.
-class GTEST_API_ Notification {
- public:
-  Notification();
-  void Notify();
-  void WaitForNotification();
-
- private:
-  AutoHandle event_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
-};
-# endif  // GTEST_HAS_NOTIFICATION_
-
-// On MinGW, we can have both GTEST_OS_WINDOWS and GTEST_HAS_PTHREAD
-// defined, but we don't want to use MinGW's pthreads implementation, which
-// has conformance problems with some versions of the POSIX standard.
-# if GTEST_HAS_PTHREAD && !GTEST_OS_WINDOWS_MINGW
-
-// As a C-function, ThreadFuncWithCLinkage cannot be templated itself.
-// Consequently, it cannot select a correct instantiation of ThreadWithParam
-// in order to call its Run(). Introducing ThreadWithParamBase as a
-// non-templated base class for ThreadWithParam allows us to bypass this
-// problem.
-class ThreadWithParamBase {
- public:
-  virtual ~ThreadWithParamBase() {}
-  virtual void Run() = 0;
-};
-
-// pthread_create() accepts a pointer to a function type with the C linkage.
-// According to the Standard (7.5/1), function types with different linkages
-// are different even if they are otherwise identical.  Some compilers (for
-// example, SunStudio) treat them as different types.  Since class methods
-// cannot be defined with C-linkage we need to define a free C-function to
-// pass into pthread_create().
-extern "C" inline void* ThreadFuncWithCLinkage(void* thread) {
-  static_cast<ThreadWithParamBase*>(thread)->Run();
-  return nullptr;
-}
-
-// Helper class for testing Google Test's multi-threading constructs.
-// To use it, write:
-//
-//   void ThreadFunc(int param) { /* Do things with param */ }
-//   Notification thread_can_start;
-//   ...
-//   // The thread_can_start parameter is optional; you can supply NULL.
-//   ThreadWithParam<int> thread(&ThreadFunc, 5, &thread_can_start);
-//   thread_can_start.Notify();
-//
-// These classes are only for testing Google Test's own constructs. Do
-// not use them in user tests, either directly or indirectly.
-template <typename T>
-class ThreadWithParam : public ThreadWithParamBase {
- public:
-  typedef void UserThreadFunc(T);
-
-  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
-      : func_(func),
-        param_(param),
-        thread_can_start_(thread_can_start),
-        finished_(false) {
-    ThreadWithParamBase* const base = this;
-    // The thread can be created only after all fields except thread_
-    // have been initialized.
-    GTEST_CHECK_POSIX_SUCCESS_(
-        pthread_create(&thread_, nullptr, &ThreadFuncWithCLinkage, base));
-  }
-  ~ThreadWithParam() override { Join(); }
-
-  void Join() {
-    if (!finished_) {
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_join(thread_, nullptr));
-      finished_ = true;
-    }
-  }
-
-  void Run() override {
-    if (thread_can_start_ != nullptr) thread_can_start_->WaitForNotification();
-    func_(param_);
-  }
-
- private:
-  UserThreadFunc* const func_;  // User-supplied thread function.
-  const T param_;  // User-supplied parameter to the thread function.
-  // When non-NULL, used to block execution until the controller thread
-  // notifies.
-  Notification* const thread_can_start_;
-  bool finished_;  // true if and only if we know that the thread function has
-                   // finished.
-  pthread_t thread_;  // The native thread object.
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
-};
-# endif  // !GTEST_OS_WINDOWS && GTEST_HAS_PTHREAD ||
-         // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-
-# if GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-// Mutex and ThreadLocal have already been imported into the namespace.
-// Nothing to do here.
-
-# elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-
-// Mutex implements mutex on Windows platforms.  It is used in conjunction
-// with class MutexLock:
-//
-//   Mutex mutex;
-//   ...
-//   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the
-//                            // end of the current scope.
-//
-// A static Mutex *must* be defined or declared using one of the following
-// macros:
-//   GTEST_DEFINE_STATIC_MUTEX_(g_some_mutex);
-//   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
-//
-// (A non-static Mutex is defined/declared in the usual way).
-class GTEST_API_ Mutex {
- public:
-  enum MutexType { kStatic = 0, kDynamic = 1 };
-  // We rely on kStaticMutex being 0 as it is to what the linker initializes
-  // type_ in static mutexes.  critical_section_ will be initialized lazily
-  // in ThreadSafeLazyInit().
-  enum StaticConstructorSelector { kStaticMutex = 0 };
-
-  // This constructor intentionally does nothing.  It relies on type_ being
-  // statically initialized to 0 (effectively setting it to kStatic) and on
-  // ThreadSafeLazyInit() to lazily initialize the rest of the members.
-  explicit Mutex(StaticConstructorSelector /*dummy*/) {}
-
-  Mutex();
-  ~Mutex();
-
-  void Lock();
-
-  void Unlock();
-
-  // Does nothing if the current thread holds the mutex. Otherwise, crashes
-  // with high probability.
-  void AssertHeld();
-
- private:
-  // Initializes owner_thread_id_ and critical_section_ in static mutexes.
-  void ThreadSafeLazyInit();
-
-  // Per https://blogs.msdn.microsoft.com/oldnewthing/20040223-00/?p=40503,
-  // we assume that 0 is an invalid value for thread IDs.
-  unsigned int owner_thread_id_;
-
-  // For static mutexes, we rely on these members being initialized to zeros
-  // by the linker.
-  MutexType type_;
-  long critical_section_init_phase_;  // NOLINT
-  GTEST_CRITICAL_SECTION* critical_section_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
-};
-
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-    extern ::testing::internal::Mutex mutex
-
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-    ::testing::internal::Mutex mutex(::testing::internal::Mutex::kStaticMutex)
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(Mutex* mutex)
-      : mutex_(mutex) { mutex_->Lock(); }
-
-  ~GTestMutexLock() { mutex_->Unlock(); }
-
- private:
-  Mutex* const mutex_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
-};
-
-typedef GTestMutexLock MutexLock;
-
-// Base class for ValueHolder<T>.  Allows a caller to hold and delete a value
-// without knowing its type.
-class ThreadLocalValueHolderBase {
- public:
-  virtual ~ThreadLocalValueHolderBase() {}
-};
-
-// Provides a way for a thread to send notifications to a ThreadLocal
-// regardless of its parameter type.
-class ThreadLocalBase {
- public:
-  // Creates a new ValueHolder<T> object holding a default value passed to
-  // this ThreadLocal<T>'s constructor and returns it.  It is the caller's
-  // responsibility not to call this when the ThreadLocal<T> instance already
-  // has a value on the current thread.
-  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const = 0;
-
- protected:
-  ThreadLocalBase() {}
-  virtual ~ThreadLocalBase() {}
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocalBase);
-};
-
-// Maps a thread to a set of ThreadLocals that have values instantiated on that
-// thread and notifies them when the thread exits.  A ThreadLocal instance is
-// expected to persist until all threads it has values on have terminated.
-class GTEST_API_ ThreadLocalRegistry {
- public:
-  // Registers thread_local_instance as having value on the current thread.
-  // Returns a value that can be used to identify the thread from other threads.
-  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance);
-
-  // Invoked when a ThreadLocal instance is destroyed.
-  static void OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance);
-};
-
-class GTEST_API_ ThreadWithParamBase {
- public:
-  void Join();
-
- protected:
-  class Runnable {
-   public:
-    virtual ~Runnable() {}
-    virtual void Run() = 0;
-  };
-
-  ThreadWithParamBase(Runnable *runnable, Notification* thread_can_start);
-  virtual ~ThreadWithParamBase();
-
- private:
-  AutoHandle thread_;
-};
-
-// Helper class for testing Google Test's multi-threading constructs.
-template <typename T>
-class ThreadWithParam : public ThreadWithParamBase {
- public:
-  typedef void UserThreadFunc(T);
-
-  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
-      : ThreadWithParamBase(new RunnableImpl(func, param), thread_can_start) {
-  }
-  virtual ~ThreadWithParam() {}
-
- private:
-  class RunnableImpl : public Runnable {
-   public:
-    RunnableImpl(UserThreadFunc* func, T param)
-        : func_(func),
-          param_(param) {
-    }
-    virtual ~RunnableImpl() {}
-    virtual void Run() {
-      func_(param_);
-    }
-
-   private:
-    UserThreadFunc* const func_;
-    const T param_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(RunnableImpl);
-  };
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
-};
-
-// Implements thread-local storage on Windows systems.
-//
-//   // Thread 1
-//   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
-//
-//   // Thread 2
-//   tl.set(150);  // Changes the value for thread 2 only.
-//   EXPECT_EQ(150, tl.get());
-//
-//   // Thread 1
-//   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
-//   tl.set(200);
-//   EXPECT_EQ(200, tl.get());
-//
-// The template type argument T must have a public copy constructor.
-// In addition, the default ThreadLocal constructor requires T to have
-// a public default constructor.
-//
-// The users of a TheadLocal instance have to make sure that all but one
-// threads (including the main one) using that instance have exited before
-// destroying it. Otherwise, the per-thread objects managed for them by the
-// ThreadLocal instance are not guaranteed to be destroyed on all platforms.
-//
-// Google Test only uses global ThreadLocal objects.  That means they
-// will die after main() has returned.  Therefore, no per-thread
-// object managed by Google Test will be leaked as long as all threads
-// using Google Test have exited when main() returns.
-template <typename T>
-class ThreadLocal : public ThreadLocalBase {
- public:
-  ThreadLocal() : default_factory_(new DefaultValueHolderFactory()) {}
-  explicit ThreadLocal(const T& value)
-      : default_factory_(new InstanceValueHolderFactory(value)) {}
-
-  ~ThreadLocal() { ThreadLocalRegistry::OnThreadLocalDestroyed(this); }
-
-  T* pointer() { return GetOrCreateValue(); }
-  const T* pointer() const { return GetOrCreateValue(); }
-  const T& get() const { return *pointer(); }
-  void set(const T& value) { *pointer() = value; }
-
- private:
-  // Holds a value of T.  Can be deleted via its base class without the caller
-  // knowing the type of T.
-  class ValueHolder : public ThreadLocalValueHolderBase {
-   public:
-    ValueHolder() : value_() {}
-    explicit ValueHolder(const T& value) : value_(value) {}
-
-    T* pointer() { return &value_; }
-
-   private:
-    T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
-  };
-
-
-  T* GetOrCreateValue() const {
-    return static_cast<ValueHolder*>(
-        ThreadLocalRegistry::GetValueOnCurrentThread(this))->pointer();
-  }
-
-  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const {
-    return default_factory_->MakeNewHolder();
-  }
-
-  class ValueHolderFactory {
-   public:
-    ValueHolderFactory() {}
-    virtual ~ValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const = 0;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
-  };
-
-  class DefaultValueHolderFactory : public ValueHolderFactory {
-   public:
-    DefaultValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const { return new ValueHolder(); }
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
-  };
-
-  class InstanceValueHolderFactory : public ValueHolderFactory {
-   public:
-    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
-    virtual ValueHolder* MakeNewHolder() const {
-      return new ValueHolder(value_);
-    }
-
-   private:
-    const T value_;  // The value for each thread.
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
-  };
-
-  std::unique_ptr<ValueHolderFactory> default_factory_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
-};
-
-# elif GTEST_HAS_PTHREAD
-
-// MutexBase and Mutex implement mutex on pthreads-based platforms.
-class MutexBase {
- public:
-  // Acquires this mutex.
-  void Lock() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&mutex_));
-    owner_ = pthread_self();
-    has_owner_ = true;
-  }
-
-  // Releases this mutex.
-  void Unlock() {
-    // Since the lock is being released the owner_ field should no longer be
-    // considered valid. We don't protect writing to has_owner_ here, as it's
-    // the caller's responsibility to ensure that the current thread holds the
-    // mutex when this is called.
-    has_owner_ = false;
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&mutex_));
-  }
-
-  // Does nothing if the current thread holds the mutex. Otherwise, crashes
-  // with high probability.
-  void AssertHeld() const {
-    GTEST_CHECK_(has_owner_ && pthread_equal(owner_, pthread_self()))
-        << "The current thread is not holding the mutex @" << this;
-  }
-
-  // A static mutex may be used before main() is entered.  It may even
-  // be used before the dynamic initialization stage.  Therefore we
-  // must be able to initialize a static mutex object at link time.
-  // This means MutexBase has to be a POD and its member variables
-  // have to be public.
- public:
-  pthread_mutex_t mutex_;  // The underlying pthread mutex.
-  // has_owner_ indicates whether the owner_ field below contains a valid thread
-  // ID and is therefore safe to inspect (e.g., to use in pthread_equal()). All
-  // accesses to the owner_ field should be protected by a check of this field.
-  // An alternative might be to memset() owner_ to all zeros, but there's no
-  // guarantee that a zero'd pthread_t is necessarily invalid or even different
-  // from pthread_self().
-  bool has_owner_;
-  pthread_t owner_;  // The thread holding the mutex.
-};
-
-// Forward-declares a static mutex.
-#  define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-     extern ::testing::internal::MutexBase mutex
-
-// Defines and statically (i.e. at link time) initializes a static mutex.
-// The initialization list here does not explicitly initialize each field,
-// instead relying on default initialization for the unspecified fields. In
-// particular, the owner_ field (a pthread_t) is not explicitly initialized.
-// This allows initialization to work whether pthread_t is a scalar or struct.
-// The flag -Wmissing-field-initializers must not be specified for this to work.
-#define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
-  ::testing::internal::MutexBase mutex = {PTHREAD_MUTEX_INITIALIZER, false, 0}
-
-// The Mutex class can only be used for mutexes created at runtime. It
-// shares its API with MutexBase otherwise.
-class Mutex : public MutexBase {
- public:
-  Mutex() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, nullptr));
-    has_owner_ = false;
-  }
-  ~Mutex() {
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&mutex_));
-  }
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
-};
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(MutexBase* mutex)
-      : mutex_(mutex) { mutex_->Lock(); }
-
-  ~GTestMutexLock() { mutex_->Unlock(); }
-
- private:
-  MutexBase* const mutex_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
-};
-
-typedef GTestMutexLock MutexLock;
-
-// Helpers for ThreadLocal.
-
-// pthread_key_create() requires DeleteThreadLocalValue() to have
-// C-linkage.  Therefore it cannot be templatized to access
-// ThreadLocal<T>.  Hence the need for class
-// ThreadLocalValueHolderBase.
-class ThreadLocalValueHolderBase {
- public:
-  virtual ~ThreadLocalValueHolderBase() {}
-};
-
-// Called by pthread to delete thread-local data stored by
-// pthread_setspecific().
-extern "C" inline void DeleteThreadLocalValue(void* value_holder) {
-  delete static_cast<ThreadLocalValueHolderBase*>(value_holder);
-}
-
-// Implements thread-local storage on pthreads-based systems.
-template <typename T>
-class GTEST_API_ ThreadLocal {
- public:
-  ThreadLocal()
-      : key_(CreateKey()), default_factory_(new DefaultValueHolderFactory()) {}
-  explicit ThreadLocal(const T& value)
-      : key_(CreateKey()),
-        default_factory_(new InstanceValueHolderFactory(value)) {}
-
-  ~ThreadLocal() {
-    // Destroys the managed object for the current thread, if any.
-    DeleteThreadLocalValue(pthread_getspecific(key_));
-
-    // Releases resources associated with the key.  This will *not*
-    // delete managed objects for other threads.
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_key_delete(key_));
-  }
-
-  T* pointer() { return GetOrCreateValue(); }
-  const T* pointer() const { return GetOrCreateValue(); }
-  const T& get() const { return *pointer(); }
-  void set(const T& value) { *pointer() = value; }
-
- private:
-  // Holds a value of type T.
-  class ValueHolder : public ThreadLocalValueHolderBase {
-   public:
-    ValueHolder() : value_() {}
-    explicit ValueHolder(const T& value) : value_(value) {}
-
-    T* pointer() { return &value_; }
-
-   private:
-    T value_;
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
-  };
-
-  static pthread_key_t CreateKey() {
-    pthread_key_t key;
-    // When a thread exits, DeleteThreadLocalValue() will be called on
-    // the object managed for that thread.
-    GTEST_CHECK_POSIX_SUCCESS_(
-        pthread_key_create(&key, &DeleteThreadLocalValue));
-    return key;
-  }
-
-  T* GetOrCreateValue() const {
-    ThreadLocalValueHolderBase* const holder =
-        static_cast<ThreadLocalValueHolderBase*>(pthread_getspecific(key_));
-    if (holder != nullptr) {
-      return CheckedDowncastToActualType<ValueHolder>(holder)->pointer();
-    }
-
-    ValueHolder* const new_holder = default_factory_->MakeNewHolder();
-    ThreadLocalValueHolderBase* const holder_base = new_holder;
-    GTEST_CHECK_POSIX_SUCCESS_(pthread_setspecific(key_, holder_base));
-    return new_holder->pointer();
-  }
-
-  class ValueHolderFactory {
-   public:
-    ValueHolderFactory() {}
-    virtual ~ValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const = 0;
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
-  };
-
-  class DefaultValueHolderFactory : public ValueHolderFactory {
-   public:
-    DefaultValueHolderFactory() {}
-    virtual ValueHolder* MakeNewHolder() const { return new ValueHolder(); }
-
-   private:
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
-  };
-
-  class InstanceValueHolderFactory : public ValueHolderFactory {
-   public:
-    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
-    virtual ValueHolder* MakeNewHolder() const {
-      return new ValueHolder(value_);
-    }
-
-   private:
-    const T value_;  // The value for each thread.
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
-  };
-
-  // A key pthreads uses for looking up per-thread values.
-  const pthread_key_t key_;
-  std::unique_ptr<ValueHolderFactory> default_factory_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
-};
-
-# endif  // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
-
-#else  // GTEST_IS_THREADSAFE
-
-// A dummy implementation of synchronization primitives (mutex, lock,
-// and thread-local variable).  Necessary for compiling Google Test where
-// mutex is not supported - using Google Test in multiple threads is not
-// supported on such platforms.
-
-class Mutex {
- public:
-  Mutex() {}
-  void Lock() {}
-  void Unlock() {}
-  void AssertHeld() const {}
-};
-
-# define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
-  extern ::testing::internal::Mutex mutex
-
-# define GTEST_DEFINE_STATIC_MUTEX_(mutex) ::testing::internal::Mutex mutex
-
-// We cannot name this class MutexLock because the ctor declaration would
-// conflict with a macro named MutexLock, which is defined on some
-// platforms. That macro is used as a defensive measure to prevent against
-// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
-// "MutexLock l(&mu)".  Hence the typedef trick below.
-class GTestMutexLock {
- public:
-  explicit GTestMutexLock(Mutex*) {}  // NOLINT
-};
-
-typedef GTestMutexLock MutexLock;
-
-template <typename T>
-class GTEST_API_ ThreadLocal {
- public:
-  ThreadLocal() : value_() {}
-  explicit ThreadLocal(const T& value) : value_(value) {}
-  T* pointer() { return &value_; }
-  const T* pointer() const { return &value_; }
-  const T& get() const { return value_; }
-  void set(const T& value) { value_ = value; }
- private:
-  T value_;
-};
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-GTEST_API_ size_t GetThreadCount();
-
-template <bool B>
-using bool_constant = std::integral_constant<bool, B>;
-
-#if GTEST_OS_WINDOWS
-# define GTEST_PATH_SEP_ "\\"
-# define GTEST_HAS_ALT_PATH_SEP_ 1
-// The biggest signed integer type the compiler supports.
-typedef __int64 BiggestInt;
-#else
-# define GTEST_PATH_SEP_ "/"
-# define GTEST_HAS_ALT_PATH_SEP_ 0
-typedef long long BiggestInt;  // NOLINT
-#endif  // GTEST_OS_WINDOWS
-
-// Utilities for char.
-
-// isspace(int ch) and friends accept an unsigned char or EOF.  char
-// may be signed, depending on the compiler (or compiler flags).
-// Therefore we need to cast a char to unsigned char before calling
-// isspace(), etc.
-
-inline bool IsAlpha(char ch) {
-  return isalpha(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsAlNum(char ch) {
-  return isalnum(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsDigit(char ch) {
-  return isdigit(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsLower(char ch) {
-  return islower(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsSpace(char ch) {
-  return isspace(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsUpper(char ch) {
-  return isupper(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsXDigit(char ch) {
-  return isxdigit(static_cast<unsigned char>(ch)) != 0;
-}
-inline bool IsXDigit(wchar_t ch) {
-  const unsigned char low_byte = static_cast<unsigned char>(ch);
-  return ch == low_byte && isxdigit(low_byte) != 0;
-}
-
-inline char ToLower(char ch) {
-  return static_cast<char>(tolower(static_cast<unsigned char>(ch)));
-}
-inline char ToUpper(char ch) {
-  return static_cast<char>(toupper(static_cast<unsigned char>(ch)));
-}
-
-inline std::string StripTrailingSpaces(std::string str) {
-  std::string::iterator it = str.end();
-  while (it != str.begin() && IsSpace(*--it))
-    it = str.erase(it);
-  return str;
-}
-
-// The testing::internal::posix namespace holds wrappers for common
-// POSIX functions.  These wrappers hide the differences between
-// Windows/MSVC and POSIX systems.  Since some compilers define these
-// standard functions as macros, the wrapper cannot have the same name
-// as the wrapped function.
-
-namespace posix {
-
-// Functions with a different name on Windows.
-
-#if GTEST_OS_WINDOWS
-
-typedef struct _stat StatStruct;
-
-# ifdef __BORLANDC__
-inline int IsATTY(int fd) { return isatty(fd); }
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return stricmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-# else  // !__BORLANDC__
-#  if GTEST_OS_WINDOWS_MOBILE
-inline int IsATTY(int /* fd */) { return 0; }
-#  else
-inline int IsATTY(int fd) { return _isatty(fd); }
-#  endif  // GTEST_OS_WINDOWS_MOBILE
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return _stricmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return _strdup(src); }
-# endif  // __BORLANDC__
-
-# if GTEST_OS_WINDOWS_MOBILE
-inline int FileNo(FILE* file) { return reinterpret_cast<int>(_fileno(file)); }
-// Stat(), RmDir(), and IsDir() are not needed on Windows CE at this
-// time and thus not defined there.
-# else
-inline int FileNo(FILE* file) { return _fileno(file); }
-inline int Stat(const char* path, StatStruct* buf) { return _stat(path, buf); }
-inline int RmDir(const char* dir) { return _rmdir(dir); }
-inline bool IsDir(const StatStruct& st) {
-  return (_S_IFDIR & st.st_mode) != 0;
-}
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-#else
-
-typedef struct stat StatStruct;
-
-inline int FileNo(FILE* file) { return fileno(file); }
-inline int IsATTY(int fd) { return isatty(fd); }
-inline int Stat(const char* path, StatStruct* buf) { return stat(path, buf); }
-inline int StrCaseCmp(const char* s1, const char* s2) {
-  return strcasecmp(s1, s2);
-}
-inline char* StrDup(const char* src) { return strdup(src); }
-inline int RmDir(const char* dir) { return rmdir(dir); }
-inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
-
-#endif  // GTEST_OS_WINDOWS
-
-// Functions deprecated by MSVC 8.0.
-
-GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-
-inline const char* StrNCpy(char* dest, const char* src, size_t n) {
-  return strncpy(dest, src, n);
-}
-
-// ChDir(), FReopen(), FDOpen(), Read(), Write(), Close(), and
-// StrError() aren't needed on Windows CE at this time and thus not
-// defined there.
-
-#if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-inline int ChDir(const char* dir) { return chdir(dir); }
-#endif
-inline FILE* FOpen(const char* path, const char* mode) {
-  return fopen(path, mode);
-}
-#if !GTEST_OS_WINDOWS_MOBILE
-inline FILE *FReopen(const char* path, const char* mode, FILE* stream) {
-  return freopen(path, mode, stream);
-}
-inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
-#endif
-inline int FClose(FILE* fp) { return fclose(fp); }
-#if !GTEST_OS_WINDOWS_MOBILE
-inline int Read(int fd, void* buf, unsigned int count) {
-  return static_cast<int>(read(fd, buf, count));
-}
-inline int Write(int fd, const void* buf, unsigned int count) {
-  return static_cast<int>(write(fd, buf, count));
-}
-inline int Close(int fd) { return close(fd); }
-inline const char* StrError(int errnum) { return strerror(errnum); }
-#endif
-inline const char* GetEnv(const char* name) {
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT
-  // We are on Windows CE, which has no environment variables.
-  static_cast<void>(name);  // To prevent 'unused argument' warning.
-  return nullptr;
-#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
-  // Environment variables which we programmatically clear will be set to the
-  // empty string rather than unset (NULL).  Handle that case.
-  const char* const env = getenv(name);
-  return (env != nullptr && env[0] != '\0') ? env : nullptr;
-#else
-  return getenv(name);
-#endif
-}
-
-GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-#if GTEST_OS_WINDOWS_MOBILE
-// Windows CE has no C library. The abort() function is used in
-// several places in Google Test. This implementation provides a reasonable
-// imitation of standard behaviour.
-[[noreturn]] void Abort();
-#else
-[[noreturn]] inline void Abort() { abort(); }
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-}  // namespace posix
-
-// MSVC "deprecates" snprintf and issues warnings wherever it is used.  In
-// order to avoid these warnings, we need to use _snprintf or _snprintf_s on
-// MSVC-based platforms.  We map the GTEST_SNPRINTF_ macro to the appropriate
-// function in order to achieve that.  We use macro definition here because
-// snprintf is a variadic function.
-#if _MSC_VER && !GTEST_OS_WINDOWS_MOBILE
-// MSVC 2005 and above support variadic macros.
-# define GTEST_SNPRINTF_(buffer, size, format, ...) \
-     _snprintf_s(buffer, size, size, format, __VA_ARGS__)
-#elif defined(_MSC_VER)
-// Windows CE does not define _snprintf_s
-# define GTEST_SNPRINTF_ _snprintf
-#else
-# define GTEST_SNPRINTF_ snprintf
-#endif
-
-// The maximum number a BiggestInt can represent.  This definition
-// works no matter BiggestInt is represented in one's complement or
-// two's complement.
-//
-// We cannot rely on numeric_limits in STL, as __int64 and long long
-// are not part of standard C++ and numeric_limits doesn't need to be
-// defined for them.
-const BiggestInt kMaxBiggestInt =
-    ~(static_cast<BiggestInt>(1) << (8*sizeof(BiggestInt) - 1));
-
-// This template class serves as a compile-time function from size to
-// type.  It maps a size in bytes to a primitive type with that
-// size. e.g.
-//
-//   TypeWithSize<4>::UInt
-//
-// is typedef-ed to be unsigned int (unsigned integer made up of 4
-// bytes).
-//
-// Such functionality should belong to STL, but I cannot find it
-// there.
-//
-// Google Test uses this class in the implementation of floating-point
-// comparison.
-//
-// For now it only handles UInt (unsigned int) as that's all Google Test
-// needs.  Other types can be easily added in the future if need
-// arises.
-template <size_t size>
-class TypeWithSize {
- public:
-  // This prevents the user from using TypeWithSize<N> with incorrect
-  // values of N.
-  typedef void UInt;
-};
-
-// The specialization for size 4.
-template <>
-class TypeWithSize<4> {
- public:
-  // unsigned int has size 4 in both gcc and MSVC.
-  //
-  // As base/basictypes.h doesn't compile on Windows, we cannot use
-  // uint32, uint64, and etc here.
-  typedef int Int;
-  typedef unsigned int UInt;
-};
-
-// The specialization for size 8.
-template <>
-class TypeWithSize<8> {
- public:
-#if GTEST_OS_WINDOWS
-  typedef __int64 Int;
-  typedef unsigned __int64 UInt;
-#else
-  typedef long long Int;  // NOLINT
-  typedef unsigned long long UInt;  // NOLINT
-#endif  // GTEST_OS_WINDOWS
-};
-
-// Integer types of known sizes.
-typedef TypeWithSize<4>::Int Int32;
-typedef TypeWithSize<4>::UInt UInt32;
-typedef TypeWithSize<8>::Int Int64;
-typedef TypeWithSize<8>::UInt UInt64;
-typedef TypeWithSize<8>::Int TimeInMillis;  // Represents time in milliseconds.
-
-// Utilities for command line flags and environment variables.
-
-// Macro for referencing flags.
-#if !defined(GTEST_FLAG)
-# define GTEST_FLAG(name) FLAGS_gtest_##name
-#endif  // !defined(GTEST_FLAG)
-
-#if !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
-# define GTEST_USE_OWN_FLAGFILE_FLAG_ 1
-#endif  // !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
-
-#if !defined(GTEST_DECLARE_bool_)
-# define GTEST_FLAG_SAVER_ ::testing::internal::GTestFlagSaver
-
-// Macros for declaring flags.
-# define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
-# define GTEST_DECLARE_int32_(name) \
-    GTEST_API_ extern ::testing::internal::Int32 GTEST_FLAG(name)
-# define GTEST_DECLARE_string_(name) \
-    GTEST_API_ extern ::std::string GTEST_FLAG(name)
-
-// Macros for defining flags.
-# define GTEST_DEFINE_bool_(name, default_val, doc) \
-    GTEST_API_ bool GTEST_FLAG(name) = (default_val)
-# define GTEST_DEFINE_int32_(name, default_val, doc) \
-    GTEST_API_ ::testing::internal::Int32 GTEST_FLAG(name) = (default_val)
-# define GTEST_DEFINE_string_(name, default_val, doc) \
-    GTEST_API_ ::std::string GTEST_FLAG(name) = (default_val)
-
-#endif  // !defined(GTEST_DECLARE_bool_)
-
-// Thread annotations
-#if !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
-# define GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
-# define GTEST_LOCK_EXCLUDED_(locks)
-#endif  // !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
-// to *value and returns true; otherwise leaves *value unchanged and returns
-// false.
-bool ParseInt32(const Message& src_text, const char* str, Int32* value);
-
-// Parses a bool/Int32/string from the environment variable
-// corresponding to the given Google Test flag.
-bool BoolFromGTestEnv(const char* flag, bool default_val);
-GTEST_API_ Int32 Int32FromGTestEnv(const char* flag, Int32 default_val);
-std::string OutputFlagAlsoCheckEnvVar();
-const char* StringFromGTestEnv(const char* flag, const char* default_val);
-
-}  // namespace internal
-}  // namespace testing
-
-#if !defined(GTEST_INTERNAL_DEPRECATED)
-
-// Internal Macro to mark an API deprecated, for googletest usage only
-// Usage: class GTEST_INTERNAL_DEPRECATED(message) MyClass or
-// GTEST_INTERNAL_DEPRECATED(message) <return_type> myFunction(); Every usage of
-// a deprecated entity will trigger a warning when compiled with
-// `-Wdeprecated-declarations` option (clang, gcc, any __GNUC__ compiler).
-// For msvc /W3 option will need to be used
-// Note that for 'other' compilers this macro evaluates to nothing to prevent
-// compilations errors.
-#if defined(_MSC_VER)
-#define GTEST_INTERNAL_DEPRECATED(message) __declspec(deprecated(message))
-#elif defined(__GNUC__)
-#define GTEST_INTERNAL_DEPRECATED(message) __attribute__((deprecated(message)))
-#else
-#define GTEST_INTERNAL_DEPRECATED(message)
-#endif
-
-#endif  // !defined(GTEST_INTERNAL_DEPRECATED)
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-string.h b/3rdparty/gtest/include/gtest/internal/gtest-string.h
deleted file mode 100644
index 82aaa63b..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-string.h
+++ /dev/null
@@ -1,171 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file declares the String class and functions used internally by
-// Google Test.  They are subject to change without notice. They should not used
-// by code external to Google Test.
-//
-// This header file is #included by gtest-internal.h.
-// It should not be #included by other files.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
-
-#ifdef __BORLANDC__
-// string.h is not guaranteed to provide strcpy on C++ Builder.
-# include <mem.h>
-#endif
-
-#include <string.h>
-#include <string>
-
-#include "gtest/internal/gtest-port.h"
-
-namespace testing {
-namespace internal {
-
-// String - an abstract class holding static string utilities.
-class GTEST_API_ String {
- public:
-  // Static utility methods
-
-  // Clones a 0-terminated C string, allocating memory using new.  The
-  // caller is responsible for deleting the return value using
-  // delete[].  Returns the cloned string, or NULL if the input is
-  // NULL.
-  //
-  // This is different from strdup() in string.h, which allocates
-  // memory using malloc().
-  static const char* CloneCString(const char* c_str);
-
-#if GTEST_OS_WINDOWS_MOBILE
-  // Windows CE does not have the 'ANSI' versions of Win32 APIs. To be
-  // able to pass strings to Win32 APIs on CE we need to convert them
-  // to 'Unicode', UTF-16.
-
-  // Creates a UTF-16 wide string from the given ANSI string, allocating
-  // memory using new. The caller is responsible for deleting the return
-  // value using delete[]. Returns the wide string, or NULL if the
-  // input is NULL.
-  //
-  // The wide string is created using the ANSI codepage (CP_ACP) to
-  // match the behaviour of the ANSI versions of Win32 calls and the
-  // C runtime.
-  static LPCWSTR AnsiToUtf16(const char* c_str);
-
-  // Creates an ANSI string from the given wide string, allocating
-  // memory using new. The caller is responsible for deleting the return
-  // value using delete[]. Returns the ANSI string, or NULL if the
-  // input is NULL.
-  //
-  // The returned string is created using the ANSI codepage (CP_ACP) to
-  // match the behaviour of the ANSI versions of Win32 calls and the
-  // C runtime.
-  static const char* Utf16ToAnsi(LPCWSTR utf16_str);
-#endif
-
-  // Compares two C strings.  Returns true if and only if they have the same
-  // content.
-  //
-  // Unlike strcmp(), this function can handle NULL argument(s).  A
-  // NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool CStringEquals(const char* lhs, const char* rhs);
-
-  // Converts a wide C string to a String using the UTF-8 encoding.
-  // NULL will be converted to "(null)".  If an error occurred during
-  // the conversion, "(failed to convert from wide string)" is
-  // returned.
-  static std::string ShowWideCString(const wchar_t* wide_c_str);
-
-  // Compares two wide C strings.  Returns true if and only if they have the
-  // same content.
-  //
-  // Unlike wcscmp(), this function can handle NULL argument(s).  A
-  // NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool WideCStringEquals(const wchar_t* lhs, const wchar_t* rhs);
-
-  // Compares two C strings, ignoring case.  Returns true if and only if
-  // they have the same content.
-  //
-  // Unlike strcasecmp(), this function can handle NULL argument(s).
-  // A NULL C string is considered different to any non-NULL C string,
-  // including the empty string.
-  static bool CaseInsensitiveCStringEquals(const char* lhs,
-                                           const char* rhs);
-
-  // Compares two wide C strings, ignoring case.  Returns true if and only if
-  // they have the same content.
-  //
-  // Unlike wcscasecmp(), this function can handle NULL argument(s).
-  // A NULL C string is considered different to any non-NULL wide C string,
-  // including the empty string.
-  // NB: The implementations on different platforms slightly differ.
-  // On windows, this method uses _wcsicmp which compares according to LC_CTYPE
-  // environment variable. On GNU platform this method uses wcscasecmp
-  // which compares according to LC_CTYPE category of the current locale.
-  // On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
-  // current locale.
-  static bool CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
-                                               const wchar_t* rhs);
-
-  // Returns true if and only if the given string ends with the given suffix,
-  // ignoring case. Any string is considered to end with an empty suffix.
-  static bool EndsWithCaseInsensitive(
-      const std::string& str, const std::string& suffix);
-
-  // Formats an int value as "%02d".
-  static std::string FormatIntWidth2(int value);  // "%02d" for width == 2
-
-  // Formats an int value as "%X".
-  static std::string FormatHexInt(int value);
-
-  // Formats an int value as "%X".
-  static std::string FormatHexUInt32(UInt32 value);
-
-  // Formats a byte as "%02X".
-  static std::string FormatByte(unsigned char value);
-
- private:
-  String();  // Not meant to be instantiated.
-};  // class String
-
-// Gets the content of the stringstream's buffer as an std::string.  Each '\0'
-// character in the buffer is replaced with "\\0".
-GTEST_API_ std::string StringStreamToString(::std::stringstream* stream);
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_STRING_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-type-util.h b/3rdparty/gtest/include/gtest/internal/gtest-type-util.h
deleted file mode 100644
index 3d7542d1..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-type-util.h
+++ /dev/null
@@ -1,3335 +0,0 @@
-// This file was GENERATED by command:
-//     pump.py gtest-type-util.h.pump
-// DO NOT EDIT BY HAND!!!
-
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Type utilities needed for implementing typed and type-parameterized
-// tests.  This file is generated by a SCRIPT.  DO NOT EDIT BY HAND!
-//
-// Currently we support at most 50 types in a list, and at most 50
-// type-parameterized tests in one type-parameterized test suite.
-// Please contact googletestframework@googlegroups.com if you need
-// more.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-
-#include "gtest/internal/gtest-port.h"
-
-// #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
-// libstdc++ (which is where cxxabi.h comes from).
-# if GTEST_HAS_CXXABI_H_
-#  include <cxxabi.h>
-# elif defined(__HP_aCC)
-#  include <acxx_demangle.h>
-# endif  // GTEST_HASH_CXXABI_H_
-
-namespace testing {
-namespace internal {
-
-// Canonicalizes a given name with respect to the Standard C++ Library.
-// This handles removing the inline namespace within `std` that is
-// used by various standard libraries (e.g., `std::__1`).  Names outside
-// of namespace std are returned unmodified.
-inline std::string CanonicalizeForStdLibVersioning(std::string s) {
-  static const char prefix[] = "std::__";
-  if (s.compare(0, strlen(prefix), prefix) == 0) {
-    std::string::size_type end = s.find("::", strlen(prefix));
-    if (end != s.npos) {
-      // Erase everything between the initial `std` and the second `::`.
-      s.erase(strlen("std"), end - strlen("std"));
-    }
-  }
-  return s;
-}
-
-// GetTypeName<T>() returns a human-readable name of type T.
-// NB: This function is also used in Google Mock, so don't move it inside of
-// the typed-test-only section below.
-template <typename T>
-std::string GetTypeName() {
-# if GTEST_HAS_RTTI
-
-  const char* const name = typeid(T).name();
-#  if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
-  int status = 0;
-  // gcc's implementation of typeid(T).name() mangles the type name,
-  // so we have to demangle it.
-#   if GTEST_HAS_CXXABI_H_
-  using abi::__cxa_demangle;
-#   endif  // GTEST_HAS_CXXABI_H_
-  char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
-  const std::string name_str(status == 0 ? readable_name : name);
-  free(readable_name);
-  return CanonicalizeForStdLibVersioning(name_str);
-#  else
-  return name;
-#  endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
-
-# else
-
-  return "<type>";
-
-# endif  // GTEST_HAS_RTTI
-}
-
-#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-// A unique type used as the default value for the arguments of class
-// template Types.  This allows us to simulate variadic templates
-// (e.g. Types<int>, Type<int, double>, and etc), which C++ doesn't
-// support directly.
-struct None {};
-
-// The following family of struct and struct templates are used to
-// represent type lists.  In particular, TypesN<T1, T2, ..., TN>
-// represents a type list with N types (T1, T2, ..., and TN) in it.
-// Except for Types0, every struct in the family has two member types:
-// Head for the first type in the list, and Tail for the rest of the
-// list.
-
-// The empty type list.
-struct Types0 {};
-
-// Type lists of length 1, 2, 3, and so on.
-
-template <typename T1>
-struct Types1 {
-  typedef T1 Head;
-  typedef Types0 Tail;
-};
-template <typename T1, typename T2>
-struct Types2 {
-  typedef T1 Head;
-  typedef Types1<T2> Tail;
-};
-
-template <typename T1, typename T2, typename T3>
-struct Types3 {
-  typedef T1 Head;
-  typedef Types2<T2, T3> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4>
-struct Types4 {
-  typedef T1 Head;
-  typedef Types3<T2, T3, T4> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-struct Types5 {
-  typedef T1 Head;
-  typedef Types4<T2, T3, T4, T5> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6>
-struct Types6 {
-  typedef T1 Head;
-  typedef Types5<T2, T3, T4, T5, T6> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7>
-struct Types7 {
-  typedef T1 Head;
-  typedef Types6<T2, T3, T4, T5, T6, T7> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8>
-struct Types8 {
-  typedef T1 Head;
-  typedef Types7<T2, T3, T4, T5, T6, T7, T8> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9>
-struct Types9 {
-  typedef T1 Head;
-  typedef Types8<T2, T3, T4, T5, T6, T7, T8, T9> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10>
-struct Types10 {
-  typedef T1 Head;
-  typedef Types9<T2, T3, T4, T5, T6, T7, T8, T9, T10> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11>
-struct Types11 {
-  typedef T1 Head;
-  typedef Types10<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12>
-struct Types12 {
-  typedef T1 Head;
-  typedef Types11<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13>
-struct Types13 {
-  typedef T1 Head;
-  typedef Types12<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14>
-struct Types14 {
-  typedef T1 Head;
-  typedef Types13<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15>
-struct Types15 {
-  typedef T1 Head;
-  typedef Types14<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16>
-struct Types16 {
-  typedef T1 Head;
-  typedef Types15<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17>
-struct Types17 {
-  typedef T1 Head;
-  typedef Types16<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18>
-struct Types18 {
-  typedef T1 Head;
-  typedef Types17<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19>
-struct Types19 {
-  typedef T1 Head;
-  typedef Types18<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20>
-struct Types20 {
-  typedef T1 Head;
-  typedef Types19<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21>
-struct Types21 {
-  typedef T1 Head;
-  typedef Types20<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22>
-struct Types22 {
-  typedef T1 Head;
-  typedef Types21<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23>
-struct Types23 {
-  typedef T1 Head;
-  typedef Types22<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24>
-struct Types24 {
-  typedef T1 Head;
-  typedef Types23<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25>
-struct Types25 {
-  typedef T1 Head;
-  typedef Types24<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26>
-struct Types26 {
-  typedef T1 Head;
-  typedef Types25<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27>
-struct Types27 {
-  typedef T1 Head;
-  typedef Types26<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28>
-struct Types28 {
-  typedef T1 Head;
-  typedef Types27<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29>
-struct Types29 {
-  typedef T1 Head;
-  typedef Types28<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30>
-struct Types30 {
-  typedef T1 Head;
-  typedef Types29<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31>
-struct Types31 {
-  typedef T1 Head;
-  typedef Types30<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32>
-struct Types32 {
-  typedef T1 Head;
-  typedef Types31<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33>
-struct Types33 {
-  typedef T1 Head;
-  typedef Types32<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34>
-struct Types34 {
-  typedef T1 Head;
-  typedef Types33<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35>
-struct Types35 {
-  typedef T1 Head;
-  typedef Types34<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36>
-struct Types36 {
-  typedef T1 Head;
-  typedef Types35<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37>
-struct Types37 {
-  typedef T1 Head;
-  typedef Types36<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38>
-struct Types38 {
-  typedef T1 Head;
-  typedef Types37<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39>
-struct Types39 {
-  typedef T1 Head;
-  typedef Types38<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40>
-struct Types40 {
-  typedef T1 Head;
-  typedef Types39<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41>
-struct Types41 {
-  typedef T1 Head;
-  typedef Types40<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42>
-struct Types42 {
-  typedef T1 Head;
-  typedef Types41<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43>
-struct Types43 {
-  typedef T1 Head;
-  typedef Types42<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44>
-struct Types44 {
-  typedef T1 Head;
-  typedef Types43<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45>
-struct Types45 {
-  typedef T1 Head;
-  typedef Types44<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46>
-struct Types46 {
-  typedef T1 Head;
-  typedef Types45<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47>
-struct Types47 {
-  typedef T1 Head;
-  typedef Types46<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46, T47> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48>
-struct Types48 {
-  typedef T1 Head;
-  typedef Types47<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46, T47, T48> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48, typename T49>
-struct Types49 {
-  typedef T1 Head;
-  typedef Types48<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46, T47, T48, T49> Tail;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48, typename T49, typename T50>
-struct Types50 {
-  typedef T1 Head;
-  typedef Types49<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-      T44, T45, T46, T47, T48, T49, T50> Tail;
-};
-
-
-}  // namespace internal
-
-// We don't want to require the users to write TypesN<...> directly,
-// as that would require them to count the length.  Types<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Types<int>
-// will appear as Types<int, None, None, ..., None> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Types<T1, ..., TN>, and Google Test will translate
-// that to TypesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Types template.
-template <typename T1 = internal::None, typename T2 = internal::None,
-    typename T3 = internal::None, typename T4 = internal::None,
-    typename T5 = internal::None, typename T6 = internal::None,
-    typename T7 = internal::None, typename T8 = internal::None,
-    typename T9 = internal::None, typename T10 = internal::None,
-    typename T11 = internal::None, typename T12 = internal::None,
-    typename T13 = internal::None, typename T14 = internal::None,
-    typename T15 = internal::None, typename T16 = internal::None,
-    typename T17 = internal::None, typename T18 = internal::None,
-    typename T19 = internal::None, typename T20 = internal::None,
-    typename T21 = internal::None, typename T22 = internal::None,
-    typename T23 = internal::None, typename T24 = internal::None,
-    typename T25 = internal::None, typename T26 = internal::None,
-    typename T27 = internal::None, typename T28 = internal::None,
-    typename T29 = internal::None, typename T30 = internal::None,
-    typename T31 = internal::None, typename T32 = internal::None,
-    typename T33 = internal::None, typename T34 = internal::None,
-    typename T35 = internal::None, typename T36 = internal::None,
-    typename T37 = internal::None, typename T38 = internal::None,
-    typename T39 = internal::None, typename T40 = internal::None,
-    typename T41 = internal::None, typename T42 = internal::None,
-    typename T43 = internal::None, typename T44 = internal::None,
-    typename T45 = internal::None, typename T46 = internal::None,
-    typename T47 = internal::None, typename T48 = internal::None,
-    typename T49 = internal::None, typename T50 = internal::None>
-struct Types {
-  typedef internal::Types50<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47, T48, T49, T50> type;
-};
-
-template <>
-struct Types<internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types0 type;
-};
-template <typename T1>
-struct Types<T1, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types1<T1> type;
-};
-template <typename T1, typename T2>
-struct Types<T1, T2, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types2<T1, T2> type;
-};
-template <typename T1, typename T2, typename T3>
-struct Types<T1, T2, T3, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types3<T1, T2, T3> type;
-};
-template <typename T1, typename T2, typename T3, typename T4>
-struct Types<T1, T2, T3, T4, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types4<T1, T2, T3, T4> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-struct Types<T1, T2, T3, T4, T5, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types5<T1, T2, T3, T4, T5> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6>
-struct Types<T1, T2, T3, T4, T5, T6, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types6<T1, T2, T3, T4, T5, T6> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7>
-struct Types<T1, T2, T3, T4, T5, T6, T7, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types7<T1, T2, T3, T4, T5, T6, T7> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types8<T1, T2, T3, T4, T5, T6, T7, T8> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types9<T1, T2, T3, T4, T5, T6, T7, T8, T9> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types11<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types12<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11,
-      T12> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types13<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types14<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types15<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types16<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types17<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types18<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types19<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types20<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types21<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types22<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types23<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types24<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types25<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types26<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25,
-      T26> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types27<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types28<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types29<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types30<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types31<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types32<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types33<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types34<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types35<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types36<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types37<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types38<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types39<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types40<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39,
-      T40> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types41<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, internal::None,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types42<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None, internal::None> {
-  typedef internal::Types43<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None, internal::None> {
-  typedef internal::Types44<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    internal::None, internal::None, internal::None, internal::None,
-    internal::None> {
-  typedef internal::Types45<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    T46, internal::None, internal::None, internal::None, internal::None> {
-  typedef internal::Types46<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    T46, T47, internal::None, internal::None, internal::None> {
-  typedef internal::Types47<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    T46, T47, T48, internal::None, internal::None> {
-  typedef internal::Types48<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47, T48> type;
-};
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48, typename T49>
-struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
-    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
-    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
-    T46, T47, T48, T49, internal::None> {
-  typedef internal::Types49<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47, T48, T49> type;
-};
-
-namespace internal {
-
-# define GTEST_TEMPLATE_ template <typename T> class
-
-// The template "selector" struct TemplateSel<Tmpl> is used to
-// represent Tmpl, which must be a class template with one type
-// parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
-// as the type Tmpl<T>.  This allows us to actually instantiate the
-// template "selected" by TemplateSel<Tmpl>.
-//
-// This trick is necessary for simulating typedef for class templates,
-// which C++ doesn't support directly.
-template <GTEST_TEMPLATE_ Tmpl>
-struct TemplateSel {
-  template <typename T>
-  struct Bind {
-    typedef Tmpl<T> type;
-  };
-};
-
-# define GTEST_BIND_(TmplSel, T) \
-  TmplSel::template Bind<T>::type
-
-// A unique struct template used as the default value for the
-// arguments of class template Templates.  This allows us to simulate
-// variadic templates (e.g. Templates<int>, Templates<int, double>,
-// and etc), which C++ doesn't support directly.
-template <typename T>
-struct NoneT {};
-
-// The following family of struct and struct templates are used to
-// represent template lists.  In particular, TemplatesN<T1, T2, ...,
-// TN> represents a list of N templates (T1, T2, ..., and TN).  Except
-// for Templates0, every struct in the family has two member types:
-// Head for the selector of the first template in the list, and Tail
-// for the rest of the list.
-
-// The empty template list.
-struct Templates0 {};
-
-// Template lists of length 1, 2, 3, and so on.
-
-template <GTEST_TEMPLATE_ T1>
-struct Templates1 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates0 Tail;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2>
-struct Templates2 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates1<T2> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3>
-struct Templates3 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates2<T2, T3> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4>
-struct Templates4 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates3<T2, T3, T4> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5>
-struct Templates5 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates4<T2, T3, T4, T5> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6>
-struct Templates6 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates5<T2, T3, T4, T5, T6> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7>
-struct Templates7 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates6<T2, T3, T4, T5, T6, T7> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8>
-struct Templates8 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates7<T2, T3, T4, T5, T6, T7, T8> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9>
-struct Templates9 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates8<T2, T3, T4, T5, T6, T7, T8, T9> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10>
-struct Templates10 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates9<T2, T3, T4, T5, T6, T7, T8, T9, T10> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11>
-struct Templates11 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates10<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12>
-struct Templates12 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates11<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13>
-struct Templates13 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates12<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14>
-struct Templates14 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates13<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15>
-struct Templates15 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates14<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16>
-struct Templates16 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates15<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17>
-struct Templates17 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates16<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18>
-struct Templates18 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates17<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19>
-struct Templates19 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates18<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20>
-struct Templates20 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates19<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21>
-struct Templates21 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates20<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22>
-struct Templates22 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates21<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23>
-struct Templates23 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates22<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24>
-struct Templates24 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates23<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25>
-struct Templates25 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates24<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26>
-struct Templates26 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates25<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27>
-struct Templates27 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates26<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28>
-struct Templates28 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates27<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29>
-struct Templates29 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates28<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30>
-struct Templates30 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates29<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31>
-struct Templates31 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates30<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32>
-struct Templates32 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates31<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33>
-struct Templates33 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates32<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34>
-struct Templates34 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates33<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35>
-struct Templates35 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates34<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36>
-struct Templates36 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates35<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37>
-struct Templates37 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates36<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38>
-struct Templates38 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates37<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39>
-struct Templates39 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates38<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40>
-struct Templates40 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates39<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41>
-struct Templates41 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates40<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42>
-struct Templates42 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates41<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43>
-struct Templates43 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates42<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44>
-struct Templates44 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates43<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45>
-struct Templates45 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates44<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46>
-struct Templates46 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates45<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47>
-struct Templates47 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates46<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46, T47> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48>
-struct Templates48 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates47<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46, T47, T48> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48,
-    GTEST_TEMPLATE_ T49>
-struct Templates49 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates48<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46, T47, T48, T49> Tail;
-};
-
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48,
-    GTEST_TEMPLATE_ T49, GTEST_TEMPLATE_ T50>
-struct Templates50 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates49<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-      T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-      T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
-      T43, T44, T45, T46, T47, T48, T49, T50> Tail;
-};
-
-
-// We don't want to require the users to write TemplatesN<...> directly,
-// as that would require them to count the length.  Templates<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Templates<list>
-// will appear as Templates<list, NoneT, NoneT, ..., NoneT> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Templates<T1, ..., TN>, and Google Test will translate
-// that to TemplatesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Templates template.
-template <GTEST_TEMPLATE_ T1 = NoneT, GTEST_TEMPLATE_ T2 = NoneT,
-    GTEST_TEMPLATE_ T3 = NoneT, GTEST_TEMPLATE_ T4 = NoneT,
-    GTEST_TEMPLATE_ T5 = NoneT, GTEST_TEMPLATE_ T6 = NoneT,
-    GTEST_TEMPLATE_ T7 = NoneT, GTEST_TEMPLATE_ T8 = NoneT,
-    GTEST_TEMPLATE_ T9 = NoneT, GTEST_TEMPLATE_ T10 = NoneT,
-    GTEST_TEMPLATE_ T11 = NoneT, GTEST_TEMPLATE_ T12 = NoneT,
-    GTEST_TEMPLATE_ T13 = NoneT, GTEST_TEMPLATE_ T14 = NoneT,
-    GTEST_TEMPLATE_ T15 = NoneT, GTEST_TEMPLATE_ T16 = NoneT,
-    GTEST_TEMPLATE_ T17 = NoneT, GTEST_TEMPLATE_ T18 = NoneT,
-    GTEST_TEMPLATE_ T19 = NoneT, GTEST_TEMPLATE_ T20 = NoneT,
-    GTEST_TEMPLATE_ T21 = NoneT, GTEST_TEMPLATE_ T22 = NoneT,
-    GTEST_TEMPLATE_ T23 = NoneT, GTEST_TEMPLATE_ T24 = NoneT,
-    GTEST_TEMPLATE_ T25 = NoneT, GTEST_TEMPLATE_ T26 = NoneT,
-    GTEST_TEMPLATE_ T27 = NoneT, GTEST_TEMPLATE_ T28 = NoneT,
-    GTEST_TEMPLATE_ T29 = NoneT, GTEST_TEMPLATE_ T30 = NoneT,
-    GTEST_TEMPLATE_ T31 = NoneT, GTEST_TEMPLATE_ T32 = NoneT,
-    GTEST_TEMPLATE_ T33 = NoneT, GTEST_TEMPLATE_ T34 = NoneT,
-    GTEST_TEMPLATE_ T35 = NoneT, GTEST_TEMPLATE_ T36 = NoneT,
-    GTEST_TEMPLATE_ T37 = NoneT, GTEST_TEMPLATE_ T38 = NoneT,
-    GTEST_TEMPLATE_ T39 = NoneT, GTEST_TEMPLATE_ T40 = NoneT,
-    GTEST_TEMPLATE_ T41 = NoneT, GTEST_TEMPLATE_ T42 = NoneT,
-    GTEST_TEMPLATE_ T43 = NoneT, GTEST_TEMPLATE_ T44 = NoneT,
-    GTEST_TEMPLATE_ T45 = NoneT, GTEST_TEMPLATE_ T46 = NoneT,
-    GTEST_TEMPLATE_ T47 = NoneT, GTEST_TEMPLATE_ T48 = NoneT,
-    GTEST_TEMPLATE_ T49 = NoneT, GTEST_TEMPLATE_ T50 = NoneT>
-struct Templates {
-  typedef Templates50<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46, T47, T48, T49, T50> type;
-};
-
-template <>
-struct Templates<NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT> {
-  typedef Templates0 type;
-};
-template <GTEST_TEMPLATE_ T1>
-struct Templates<T1, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT> {
-  typedef Templates1<T1> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2>
-struct Templates<T1, T2, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT> {
-  typedef Templates2<T1, T2> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3>
-struct Templates<T1, T2, T3, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates3<T1, T2, T3> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4>
-struct Templates<T1, T2, T3, T4, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates4<T1, T2, T3, T4> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5>
-struct Templates<T1, T2, T3, T4, T5, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates5<T1, T2, T3, T4, T5> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6>
-struct Templates<T1, T2, T3, T4, T5, T6, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates6<T1, T2, T3, T4, T5, T6> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates7<T1, T2, T3, T4, T5, T6, T7> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates8<T1, T2, T3, T4, T5, T6, T7, T8> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates9<T1, T2, T3, T4, T5, T6, T7, T8, T9> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates11<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates12<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates13<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates14<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates15<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates16<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates17<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates18<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates19<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates20<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates21<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT> {
-  typedef Templates22<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT> {
-  typedef Templates23<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT> {
-  typedef Templates24<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT> {
-  typedef Templates25<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT> {
-  typedef Templates26<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT> {
-  typedef Templates27<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT> {
-  typedef Templates28<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT> {
-  typedef Templates29<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates30<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates31<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates32<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates33<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates34<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates35<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates36<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, NoneT, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates37<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, NoneT, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates38<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates39<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, NoneT, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates40<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, NoneT, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates41<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, NoneT,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates42<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates43<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    NoneT, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates44<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, NoneT, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates45<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, T46, NoneT, NoneT, NoneT, NoneT> {
-  typedef Templates46<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, T46, T47, NoneT, NoneT, NoneT> {
-  typedef Templates47<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46, T47> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, T46, T47, T48, NoneT, NoneT> {
-  typedef Templates48<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46, T47, T48> type;
-};
-template <GTEST_TEMPLATE_ T1, GTEST_TEMPLATE_ T2, GTEST_TEMPLATE_ T3,
-    GTEST_TEMPLATE_ T4, GTEST_TEMPLATE_ T5, GTEST_TEMPLATE_ T6,
-    GTEST_TEMPLATE_ T7, GTEST_TEMPLATE_ T8, GTEST_TEMPLATE_ T9,
-    GTEST_TEMPLATE_ T10, GTEST_TEMPLATE_ T11, GTEST_TEMPLATE_ T12,
-    GTEST_TEMPLATE_ T13, GTEST_TEMPLATE_ T14, GTEST_TEMPLATE_ T15,
-    GTEST_TEMPLATE_ T16, GTEST_TEMPLATE_ T17, GTEST_TEMPLATE_ T18,
-    GTEST_TEMPLATE_ T19, GTEST_TEMPLATE_ T20, GTEST_TEMPLATE_ T21,
-    GTEST_TEMPLATE_ T22, GTEST_TEMPLATE_ T23, GTEST_TEMPLATE_ T24,
-    GTEST_TEMPLATE_ T25, GTEST_TEMPLATE_ T26, GTEST_TEMPLATE_ T27,
-    GTEST_TEMPLATE_ T28, GTEST_TEMPLATE_ T29, GTEST_TEMPLATE_ T30,
-    GTEST_TEMPLATE_ T31, GTEST_TEMPLATE_ T32, GTEST_TEMPLATE_ T33,
-    GTEST_TEMPLATE_ T34, GTEST_TEMPLATE_ T35, GTEST_TEMPLATE_ T36,
-    GTEST_TEMPLATE_ T37, GTEST_TEMPLATE_ T38, GTEST_TEMPLATE_ T39,
-    GTEST_TEMPLATE_ T40, GTEST_TEMPLATE_ T41, GTEST_TEMPLATE_ T42,
-    GTEST_TEMPLATE_ T43, GTEST_TEMPLATE_ T44, GTEST_TEMPLATE_ T45,
-    GTEST_TEMPLATE_ T46, GTEST_TEMPLATE_ T47, GTEST_TEMPLATE_ T48,
-    GTEST_TEMPLATE_ T49>
-struct Templates<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
-    T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
-    T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
-    T45, T46, T47, T48, T49, NoneT> {
-  typedef Templates49<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-      T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27,
-      T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41,
-      T42, T43, T44, T45, T46, T47, T48, T49> type;
-};
-
-// The TypeList template makes it possible to use either a single type
-// or a Types<...> list in TYPED_TEST_SUITE() and
-// INSTANTIATE_TYPED_TEST_SUITE_P().
-
-template <typename T>
-struct TypeList {
-  typedef Types1<T> type;
-};
-
-template <typename T1, typename T2, typename T3, typename T4, typename T5,
-    typename T6, typename T7, typename T8, typename T9, typename T10,
-    typename T11, typename T12, typename T13, typename T14, typename T15,
-    typename T16, typename T17, typename T18, typename T19, typename T20,
-    typename T21, typename T22, typename T23, typename T24, typename T25,
-    typename T26, typename T27, typename T28, typename T29, typename T30,
-    typename T31, typename T32, typename T33, typename T34, typename T35,
-    typename T36, typename T37, typename T38, typename T39, typename T40,
-    typename T41, typename T42, typename T43, typename T44, typename T45,
-    typename T46, typename T47, typename T48, typename T49, typename T50>
-struct TypeList<Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
-    T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
-    T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
-    T44, T45, T46, T47, T48, T49, T50> > {
-  typedef typename Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
-      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
-      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
-      T41, T42, T43, T44, T45, T46, T47, T48, T49, T50>::type type;
-};
-
-#endif  // GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
diff --git a/3rdparty/gtest/include/gtest/internal/gtest-type-util.h.pump b/3rdparty/gtest/include/gtest/internal/gtest-type-util.h.pump
deleted file mode 100644
index 5e31b7b3..00000000
--- a/3rdparty/gtest/include/gtest/internal/gtest-type-util.h.pump
+++ /dev/null
@@ -1,302 +0,0 @@
-$$ -*- mode: c++; -*-
-$var n = 50  $$ Maximum length of type lists we want to support.
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Type utilities needed for implementing typed and type-parameterized
-// tests.  This file is generated by a SCRIPT.  DO NOT EDIT BY HAND!
-//
-// Currently we support at most $n types in a list, and at most $n
-// type-parameterized tests in one type-parameterized test suite.
-// Please contact googletestframework@googlegroups.com if you need
-// more.
-
-// GOOGLETEST_CM0001 DO NOT DELETE
-
-#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
-
-#include "gtest/internal/gtest-port.h"
-
-// #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
-// libstdc++ (which is where cxxabi.h comes from).
-# if GTEST_HAS_CXXABI_H_
-#  include <cxxabi.h>
-# elif defined(__HP_aCC)
-#  include <acxx_demangle.h>
-# endif  // GTEST_HASH_CXXABI_H_
-
-namespace testing {
-namespace internal {
-
-// Canonicalizes a given name with respect to the Standard C++ Library.
-// This handles removing the inline namespace within `std` that is
-// used by various standard libraries (e.g., `std::__1`).  Names outside
-// of namespace std are returned unmodified.
-inline std::string CanonicalizeForStdLibVersioning(std::string s) {
-  static const char prefix[] = "std::__";
-  if (s.compare(0, strlen(prefix), prefix) == 0) {
-    std::string::size_type end = s.find("::", strlen(prefix));
-    if (end != s.npos) {
-      // Erase everything between the initial `std` and the second `::`.
-      s.erase(strlen("std"), end - strlen("std"));
-    }
-  }
-  return s;
-}
-
-// GetTypeName<T>() returns a human-readable name of type T.
-// NB: This function is also used in Google Mock, so don't move it inside of
-// the typed-test-only section below.
-template <typename T>
-std::string GetTypeName() {
-# if GTEST_HAS_RTTI
-
-  const char* const name = typeid(T).name();
-#  if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
-  int status = 0;
-  // gcc's implementation of typeid(T).name() mangles the type name,
-  // so we have to demangle it.
-#   if GTEST_HAS_CXXABI_H_
-  using abi::__cxa_demangle;
-#   endif  // GTEST_HAS_CXXABI_H_
-  char* const readable_name = __cxa_demangle(name, nullptr, nullptr, &status);
-  const std::string name_str(status == 0 ? readable_name : name);
-  free(readable_name);
-  return CanonicalizeForStdLibVersioning(name_str);
-#  else
-  return name;
-#  endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
-
-# else
-
-  return "<type>";
-
-# endif  // GTEST_HAS_RTTI
-}
-
-#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-// A unique type used as the default value for the arguments of class
-// template Types.  This allows us to simulate variadic templates
-// (e.g. Types<int>, Type<int, double>, and etc), which C++ doesn't
-// support directly.
-struct None {};
-
-// The following family of struct and struct templates are used to
-// represent type lists.  In particular, TypesN<T1, T2, ..., TN>
-// represents a type list with N types (T1, T2, ..., and TN) in it.
-// Except for Types0, every struct in the family has two member types:
-// Head for the first type in the list, and Tail for the rest of the
-// list.
-
-// The empty type list.
-struct Types0 {};
-
-// Type lists of length 1, 2, 3, and so on.
-
-template <typename T1>
-struct Types1 {
-  typedef T1 Head;
-  typedef Types0 Tail;
-};
-
-$range i 2..n
-
-$for i [[
-$range j 1..i
-$range k 2..i
-template <$for j, [[typename T$j]]>
-struct Types$i {
-  typedef T1 Head;
-  typedef Types$(i-1)<$for k, [[T$k]]> Tail;
-};
-
-
-]]
-
-}  // namespace internal
-
-// We don't want to require the users to write TypesN<...> directly,
-// as that would require them to count the length.  Types<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Types<int>
-// will appear as Types<int, None, None, ..., None> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Types<T1, ..., TN>, and Google Test will translate
-// that to TypesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Types template.
-
-$range i 1..n
-template <$for i, [[typename T$i = internal::None]]>
-struct Types {
-  typedef internal::Types$n<$for i, [[T$i]]> type;
-};
-
-template <>
-struct Types<$for i, [[internal::None]]> {
-  typedef internal::Types0 type;
-};
-
-$range i 1..n-1
-$for i [[
-$range j 1..i
-$range k i+1..n
-template <$for j, [[typename T$j]]>
-struct Types<$for j, [[T$j]]$for k[[, internal::None]]> {
-  typedef internal::Types$i<$for j, [[T$j]]> type;
-};
-
-]]
-
-namespace internal {
-
-# define GTEST_TEMPLATE_ template <typename T> class
-
-// The template "selector" struct TemplateSel<Tmpl> is used to
-// represent Tmpl, which must be a class template with one type
-// parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
-// as the type Tmpl<T>.  This allows us to actually instantiate the
-// template "selected" by TemplateSel<Tmpl>.
-//
-// This trick is necessary for simulating typedef for class templates,
-// which C++ doesn't support directly.
-template <GTEST_TEMPLATE_ Tmpl>
-struct TemplateSel {
-  template <typename T>
-  struct Bind {
-    typedef Tmpl<T> type;
-  };
-};
-
-# define GTEST_BIND_(TmplSel, T) \
-  TmplSel::template Bind<T>::type
-
-// A unique struct template used as the default value for the
-// arguments of class template Templates.  This allows us to simulate
-// variadic templates (e.g. Templates<int>, Templates<int, double>,
-// and etc), which C++ doesn't support directly.
-template <typename T>
-struct NoneT {};
-
-// The following family of struct and struct templates are used to
-// represent template lists.  In particular, TemplatesN<T1, T2, ...,
-// TN> represents a list of N templates (T1, T2, ..., and TN).  Except
-// for Templates0, every struct in the family has two member types:
-// Head for the selector of the first template in the list, and Tail
-// for the rest of the list.
-
-// The empty template list.
-struct Templates0 {};
-
-// Template lists of length 1, 2, 3, and so on.
-
-template <GTEST_TEMPLATE_ T1>
-struct Templates1 {
-  typedef TemplateSel<T1> Head;
-  typedef Templates0 Tail;
-};
-
-$range i 2..n
-
-$for i [[
-$range j 1..i
-$range k 2..i
-template <$for j, [[GTEST_TEMPLATE_ T$j]]>
-struct Templates$i {
-  typedef TemplateSel<T1> Head;
-  typedef Templates$(i-1)<$for k, [[T$k]]> Tail;
-};
-
-
-]]
-
-// We don't want to require the users to write TemplatesN<...> directly,
-// as that would require them to count the length.  Templates<...> is much
-// easier to write, but generates horrible messages when there is a
-// compiler error, as gcc insists on printing out each template
-// argument, even if it has the default value (this means Templates<list>
-// will appear as Templates<list, NoneT, NoneT, ..., NoneT> in the compiler
-// errors).
-//
-// Our solution is to combine the best part of the two approaches: a
-// user would write Templates<T1, ..., TN>, and Google Test will translate
-// that to TemplatesN<T1, ..., TN> internally to make error messages
-// readable.  The translation is done by the 'type' member of the
-// Templates template.
-
-$range i 1..n
-template <$for i, [[GTEST_TEMPLATE_ T$i = NoneT]]>
-struct Templates {
-  typedef Templates$n<$for i, [[T$i]]> type;
-};
-
-template <>
-struct Templates<$for i, [[NoneT]]> {
-  typedef Templates0 type;
-};
-
-$range i 1..n-1
-$for i [[
-$range j 1..i
-$range k i+1..n
-template <$for j, [[GTEST_TEMPLATE_ T$j]]>
-struct Templates<$for j, [[T$j]]$for k[[, NoneT]]> {
-  typedef Templates$i<$for j, [[T$j]]> type;
-};
-
-]]
-
-// The TypeList template makes it possible to use either a single type
-// or a Types<...> list in TYPED_TEST_SUITE() and
-// INSTANTIATE_TYPED_TEST_SUITE_P().
-
-template <typename T>
-struct TypeList {
-  typedef Types1<T> type;
-};
-
-
-$range i 1..n
-template <$for i, [[typename T$i]]>
-struct TypeList<Types<$for i, [[T$i]]> > {
-  typedef typename Types<$for i, [[T$i]]>::type type;
-};
-
-#endif  // GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
-
-}  // namespace internal
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_TYPE_UTIL_H_
diff --git a/3rdparty/gtest/samples/prime_tables.h b/3rdparty/gtest/samples/prime_tables.h
deleted file mode 100644
index 72539bf1..00000000
--- a/3rdparty/gtest/samples/prime_tables.h
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-
-// This provides interface PrimeTable that determines whether a number is a
-// prime and determines a next prime number. This interface is used
-// in Google Test samples demonstrating use of parameterized tests.
-
-#ifndef GTEST_SAMPLES_PRIME_TABLES_H_
-#define GTEST_SAMPLES_PRIME_TABLES_H_
-
-#include <algorithm>
-
-// The prime table interface.
-class PrimeTable {
- public:
-  virtual ~PrimeTable() {}
-
-  // Returns true if and only if n is a prime number.
-  virtual bool IsPrime(int n) const = 0;
-
-  // Returns the smallest prime number greater than p; or returns -1
-  // if the next prime is beyond the capacity of the table.
-  virtual int GetNextPrime(int p) const = 0;
-};
-
-// Implementation #1 calculates the primes on-the-fly.
-class OnTheFlyPrimeTable : public PrimeTable {
- public:
-  bool IsPrime(int n) const override {
-    if (n <= 1) return false;
-
-    for (int i = 2; i*i <= n; i++) {
-      // n is divisible by an integer other than 1 and itself.
-      if ((n % i) == 0) return false;
-    }
-
-    return true;
-  }
-
-  int GetNextPrime(int p) const override {
-    for (int n = p + 1; n > 0; n++) {
-      if (IsPrime(n)) return n;
-    }
-
-    return -1;
-  }
-};
-
-// Implementation #2 pre-calculates the primes and stores the result
-// in an array.
-class PreCalculatedPrimeTable : public PrimeTable {
- public:
-  // 'max' specifies the maximum number the prime table holds.
-  explicit PreCalculatedPrimeTable(int max)
-      : is_prime_size_(max + 1), is_prime_(new bool[max + 1]) {
-    CalculatePrimesUpTo(max);
-  }
-  ~PreCalculatedPrimeTable() override { delete[] is_prime_; }
-
-  bool IsPrime(int n) const override {
-    return 0 <= n && n < is_prime_size_ && is_prime_[n];
-  }
-
-  int GetNextPrime(int p) const override {
-    for (int n = p + 1; n < is_prime_size_; n++) {
-      if (is_prime_[n]) return n;
-    }
-
-    return -1;
-  }
-
- private:
-  void CalculatePrimesUpTo(int max) {
-    ::std::fill(is_prime_, is_prime_ + is_prime_size_, true);
-    is_prime_[0] = is_prime_[1] = false;
-
-    // Checks every candidate for prime number (we know that 2 is the only even
-    // prime).
-    for (int i = 2; i*i <= max; i += i%2+1) {
-      if (!is_prime_[i]) continue;
-
-      // Marks all multiples of i (except i itself) as non-prime.
-      // We are starting here from i-th multiplier, because all smaller
-      // complex numbers were already marked.
-      for (int j = i*i; j <= max; j += i) {
-        is_prime_[j] = false;
-      }
-    }
-  }
-
-  const int is_prime_size_;
-  bool* const is_prime_;
-
-  // Disables compiler warning "assignment operator could not be generated."
-  void operator=(const PreCalculatedPrimeTable& rhs);
-};
-
-#endif  // GTEST_SAMPLES_PRIME_TABLES_H_
diff --git a/3rdparty/gtest/samples/sample1.cc b/3rdparty/gtest/samples/sample1.cc
deleted file mode 100644
index 1d427597..00000000
--- a/3rdparty/gtest/samples/sample1.cc
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include "sample1.h"
-
-// Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
-int Factorial(int n) {
-  int result = 1;
-  for (int i = 1; i <= n; i++) {
-    result *= i;
-  }
-
-  return result;
-}
-
-// Returns true if and only if n is a prime number.
-bool IsPrime(int n) {
-  // Trivial case 1: small numbers
-  if (n <= 1) return false;
-
-  // Trivial case 2: even numbers
-  if (n % 2 == 0) return n == 2;
-
-  // Now, we have that n is odd and n >= 3.
-
-  // Try to divide n by every odd number i, starting from 3
-  for (int i = 3; ; i += 2) {
-    // We only have to try i up to the square root of n
-    if (i > n/i) break;
-
-    // Now, we have i <= n/i < n.
-    // If n is divisible by i, n is not prime.
-    if (n % i == 0) return false;
-  }
-
-  // n has no integer factor in the range (1, n), and thus is prime.
-  return true;
-}
diff --git a/3rdparty/gtest/samples/sample1.h b/3rdparty/gtest/samples/sample1.h
deleted file mode 100644
index 12e49dea..00000000
--- a/3rdparty/gtest/samples/sample1.h
+++ /dev/null
@@ -1,41 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GTEST_SAMPLES_SAMPLE1_H_
-#define GTEST_SAMPLES_SAMPLE1_H_
-
-// Returns n! (the factorial of n).  For negative n, n! is defined to be 1.
-int Factorial(int n);
-
-// Returns true if and only if n is a prime number.
-bool IsPrime(int n);
-
-#endif  // GTEST_SAMPLES_SAMPLE1_H_
diff --git a/3rdparty/gtest/samples/sample10_unittest.cc b/3rdparty/gtest/samples/sample10_unittest.cc
deleted file mode 100644
index 36cdac22..00000000
--- a/3rdparty/gtest/samples/sample10_unittest.cc
+++ /dev/null
@@ -1,139 +0,0 @@
-// Copyright 2009 Google Inc. All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to use Google Test listener API to implement
-// a primitive leak checker.
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "gtest/gtest.h"
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-
-namespace {
-// We will track memory used by this class.
-class Water {
- public:
-  // Normal Water declarations go here.
-
-  // operator new and operator delete help us control water allocation.
-  void* operator new(size_t allocation_size) {
-    allocated_++;
-    return malloc(allocation_size);
-  }
-
-  void operator delete(void* block, size_t /* allocation_size */) {
-    allocated_--;
-    free(block);
-  }
-
-  static int allocated() { return allocated_; }
-
- private:
-  static int allocated_;
-};
-
-int Water::allocated_ = 0;
-
-// This event listener monitors how many Water objects are created and
-// destroyed by each test, and reports a failure if a test leaks some Water
-// objects. It does this by comparing the number of live Water objects at
-// the beginning of a test and at the end of a test.
-class LeakChecker : public EmptyTestEventListener {
- private:
-  // Called before a test starts.
-  void OnTestStart(const TestInfo& /* test_info */) override {
-    initially_allocated_ = Water::allocated();
-  }
-
-  // Called after a test ends.
-  void OnTestEnd(const TestInfo& /* test_info */) override {
-    int difference = Water::allocated() - initially_allocated_;
-
-    // You can generate a failure in any event handler except
-    // OnTestPartResult. Just use an appropriate Google Test assertion to do
-    // it.
-    EXPECT_LE(difference, 0) << "Leaked " << difference << " unit(s) of Water!";
-  }
-
-  int initially_allocated_;
-};
-
-TEST(ListenersTest, DoesNotLeak) {
-  Water* water = new Water;
-  delete water;
-}
-
-// This should fail when the --check_for_leaks command line flag is
-// specified.
-TEST(ListenersTest, LeaksWater) {
-  Water* water = new Water;
-  EXPECT_TRUE(water != nullptr);
-}
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  bool check_for_leaks = false;
-  if (argc > 1 && strcmp(argv[1], "--check_for_leaks") == 0 )
-    check_for_leaks = true;
-  else
-    printf("%s\n", "Run this program with --check_for_leaks to enable "
-           "custom leak checking in the tests.");
-
-  // If we are given the --check_for_leaks command line flag, installs the
-  // leak checker.
-  if (check_for_leaks) {
-    TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-
-    // Adds the leak checker to the end of the test event listener list,
-    // after the default text output printer and the default XML report
-    // generator.
-    //
-    // The order is important - it ensures that failures generated in the
-    // leak checker's OnTestEnd() method are processed by the text and XML
-    // printers *before* their OnTestEnd() methods are called, such that
-    // they are attributed to the right test. Remember that a listener
-    // receives an OnXyzStart event *after* listeners preceding it in the
-    // list received that event, and receives an OnXyzEnd event *before*
-    // listeners preceding it.
-    //
-    // We don't need to worry about deleting the new listener later, as
-    // Google Test will do it.
-    listeners.Append(new LeakChecker);
-  }
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/samples/sample1_unittest.cc b/3rdparty/gtest/samples/sample1_unittest.cc
deleted file mode 100644
index cb08b61a..00000000
--- a/3rdparty/gtest/samples/sample1_unittest.cc
+++ /dev/null
@@ -1,151 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// This sample shows how to write a simple unit test for a function,
-// using Google C++ testing framework.
-//
-// Writing a unit test using Google C++ testing framework is easy as 1-2-3:
-
-
-// Step 1. Include necessary header files such that the stuff your
-// test logic needs is declared.
-//
-// Don't forget gtest.h, which declares the testing framework.
-
-#include <limits.h>
-#include "sample1.h"
-#include "gtest/gtest.h"
-namespace {
-
-// Step 2. Use the TEST macro to define your tests.
-//
-// TEST has two parameters: the test case name and the test name.
-// After using the macro, you should define your test logic between a
-// pair of braces.  You can use a bunch of macros to indicate the
-// success or failure of a test.  EXPECT_TRUE and EXPECT_EQ are
-// examples of such macros.  For a complete list, see gtest.h.
-//
-// <TechnicalDetails>
-//
-// In Google Test, tests are grouped into test cases.  This is how we
-// keep test code organized.  You should put logically related tests
-// into the same test case.
-//
-// The test case name and the test name should both be valid C++
-// identifiers.  And you should not use underscore (_) in the names.
-//
-// Google Test guarantees that each test you define is run exactly
-// once, but it makes no guarantee on the order the tests are
-// executed.  Therefore, you should write your tests in such a way
-// that their results don't depend on their order.
-//
-// </TechnicalDetails>
-
-
-// Tests Factorial().
-
-// Tests factorial of negative numbers.
-TEST(FactorialTest, Negative) {
-  // This test is named "Negative", and belongs to the "FactorialTest"
-  // test case.
-  EXPECT_EQ(1, Factorial(-5));
-  EXPECT_EQ(1, Factorial(-1));
-  EXPECT_GT(Factorial(-10), 0);
-
-  // <TechnicalDetails>
-  //
-  // EXPECT_EQ(expected, actual) is the same as
-  //
-  //   EXPECT_TRUE((expected) == (actual))
-  //
-  // except that it will print both the expected value and the actual
-  // value when the assertion fails.  This is very helpful for
-  // debugging.  Therefore in this case EXPECT_EQ is preferred.
-  //
-  // On the other hand, EXPECT_TRUE accepts any Boolean expression,
-  // and is thus more general.
-  //
-  // </TechnicalDetails>
-}
-
-// Tests factorial of 0.
-TEST(FactorialTest, Zero) {
-  EXPECT_EQ(1, Factorial(0));
-}
-
-// Tests factorial of positive numbers.
-TEST(FactorialTest, Positive) {
-  EXPECT_EQ(1, Factorial(1));
-  EXPECT_EQ(2, Factorial(2));
-  EXPECT_EQ(6, Factorial(3));
-  EXPECT_EQ(40320, Factorial(8));
-}
-
-
-// Tests IsPrime()
-
-// Tests negative input.
-TEST(IsPrimeTest, Negative) {
-  // This test belongs to the IsPrimeTest test case.
-
-  EXPECT_FALSE(IsPrime(-1));
-  EXPECT_FALSE(IsPrime(-2));
-  EXPECT_FALSE(IsPrime(INT_MIN));
-}
-
-// Tests some trivial cases.
-TEST(IsPrimeTest, Trivial) {
-  EXPECT_FALSE(IsPrime(0));
-  EXPECT_FALSE(IsPrime(1));
-  EXPECT_TRUE(IsPrime(2));
-  EXPECT_TRUE(IsPrime(3));
-}
-
-// Tests positive input.
-TEST(IsPrimeTest, Positive) {
-  EXPECT_FALSE(IsPrime(4));
-  EXPECT_TRUE(IsPrime(5));
-  EXPECT_FALSE(IsPrime(6));
-  EXPECT_TRUE(IsPrime(23));
-}
-}  // namespace
-
-// Step 3. Call RUN_ALL_TESTS() in main().
-//
-// We do this by linking in src/gtest_main.cc file, which consists of
-// a main() function which calls RUN_ALL_TESTS() for us.
-//
-// This runs all the tests you've defined, prints the result, and
-// returns 0 if successful, or 1 otherwise.
-//
-// Did you notice that we didn't register the tests?  The
-// RUN_ALL_TESTS() macro magically knows about all the tests we
-// defined.  Isn't this convenient?
diff --git a/3rdparty/gtest/samples/sample2.cc b/3rdparty/gtest/samples/sample2.cc
deleted file mode 100644
index d8e87239..00000000
--- a/3rdparty/gtest/samples/sample2.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include "sample2.h"
-
-#include <string.h>
-
-// Clones a 0-terminated C string, allocating memory using new.
-const char* MyString::CloneCString(const char* a_c_string) {
-  if (a_c_string == nullptr) return nullptr;
-
-  const size_t len = strlen(a_c_string);
-  char* const clone = new char[ len + 1 ];
-  memcpy(clone, a_c_string, len + 1);
-
-  return clone;
-}
-
-// Sets the 0-terminated C string this MyString object
-// represents.
-void MyString::Set(const char* a_c_string) {
-  // Makes sure this works when c_string == c_string_
-  const char* const temp = MyString::CloneCString(a_c_string);
-  delete[] c_string_;
-  c_string_ = temp;
-}
diff --git a/3rdparty/gtest/samples/sample2.h b/3rdparty/gtest/samples/sample2.h
deleted file mode 100644
index e9a5a705..00000000
--- a/3rdparty/gtest/samples/sample2.h
+++ /dev/null
@@ -1,81 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GTEST_SAMPLES_SAMPLE2_H_
-#define GTEST_SAMPLES_SAMPLE2_H_
-
-#include <string.h>
-
-
-// A simple string class.
-class MyString {
- private:
-  const char* c_string_;
-  const MyString& operator=(const MyString& rhs);
-
- public:
-  // Clones a 0-terminated C string, allocating memory using new.
-  static const char* CloneCString(const char* a_c_string);
-
-  ////////////////////////////////////////////////////////////
-  //
-  // C'tors
-
-  // The default c'tor constructs a NULL string.
-  MyString() : c_string_(nullptr) {}
-
-  // Constructs a MyString by cloning a 0-terminated C string.
-  explicit MyString(const char* a_c_string) : c_string_(nullptr) {
-    Set(a_c_string);
-  }
-
-  // Copy c'tor
-  MyString(const MyString& string) : c_string_(nullptr) {
-    Set(string.c_string_);
-  }
-
-  ////////////////////////////////////////////////////////////
-  //
-  // D'tor.  MyString is intended to be a final class, so the d'tor
-  // doesn't need to be virtual.
-  ~MyString() { delete[] c_string_; }
-
-  // Gets the 0-terminated C string this MyString object represents.
-  const char* c_string() const { return c_string_; }
-
-  size_t Length() const { return c_string_ == nullptr ? 0 : strlen(c_string_); }
-
-  // Sets the 0-terminated C string this MyString object represents.
-  void Set(const char* c_string);
-};
-
-
-#endif  // GTEST_SAMPLES_SAMPLE2_H_
diff --git a/3rdparty/gtest/samples/sample2_unittest.cc b/3rdparty/gtest/samples/sample2_unittest.cc
deleted file mode 100644
index 41e31c17..00000000
--- a/3rdparty/gtest/samples/sample2_unittest.cc
+++ /dev/null
@@ -1,107 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// This sample shows how to write a more complex unit test for a class
-// that has multiple member functions.
-//
-// Usually, it's a good idea to have one test for each method in your
-// class.  You don't have to do that exactly, but it helps to keep
-// your tests organized.  You may also throw in additional tests as
-// needed.
-
-#include "sample2.h"
-#include "gtest/gtest.h"
-namespace {
-// In this example, we test the MyString class (a simple string).
-
-// Tests the default c'tor.
-TEST(MyString, DefaultConstructor) {
-  const MyString s;
-
-  // Asserts that s.c_string() returns NULL.
-  //
-  // <TechnicalDetails>
-  //
-  // If we write NULL instead of
-  //
-  //   static_cast<const char *>(NULL)
-  //
-  // in this assertion, it will generate a warning on gcc 3.4.  The
-  // reason is that EXPECT_EQ needs to know the types of its
-  // arguments in order to print them when it fails.  Since NULL is
-  // #defined as 0, the compiler will use the formatter function for
-  // int to print it.  However, gcc thinks that NULL should be used as
-  // a pointer, not an int, and therefore complains.
-  //
-  // The root of the problem is C++'s lack of distinction between the
-  // integer number 0 and the null pointer constant.  Unfortunately,
-  // we have to live with this fact.
-  //
-  // </TechnicalDetails>
-  EXPECT_STREQ(nullptr, s.c_string());
-
-  EXPECT_EQ(0u, s.Length());
-}
-
-const char kHelloString[] = "Hello, world!";
-
-// Tests the c'tor that accepts a C string.
-TEST(MyString, ConstructorFromCString) {
-  const MyString s(kHelloString);
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-  EXPECT_EQ(sizeof(kHelloString)/sizeof(kHelloString[0]) - 1,
-            s.Length());
-}
-
-// Tests the copy c'tor.
-TEST(MyString, CopyConstructor) {
-  const MyString s1(kHelloString);
-  const MyString s2 = s1;
-  EXPECT_EQ(0, strcmp(s2.c_string(), kHelloString));
-}
-
-// Tests the Set method.
-TEST(MyString, Set) {
-  MyString s;
-
-  s.Set(kHelloString);
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-
-  // Set should work when the input pointer is the same as the one
-  // already in the MyString object.
-  s.Set(s.c_string());
-  EXPECT_EQ(0, strcmp(s.c_string(), kHelloString));
-
-  // Can we set the MyString to NULL?
-  s.Set(nullptr);
-  EXPECT_STREQ(nullptr, s.c_string());
-}
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample3-inl.h b/3rdparty/gtest/samples/sample3-inl.h
deleted file mode 100644
index 80ba6b92..00000000
--- a/3rdparty/gtest/samples/sample3-inl.h
+++ /dev/null
@@ -1,172 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#ifndef GTEST_SAMPLES_SAMPLE3_INL_H_
-#define GTEST_SAMPLES_SAMPLE3_INL_H_
-
-#include <stddef.h>
-
-
-// Queue is a simple queue implemented as a singled-linked list.
-//
-// The element type must support copy constructor.
-template <typename E>  // E is the element type
-class Queue;
-
-// QueueNode is a node in a Queue, which consists of an element of
-// type E and a pointer to the next node.
-template <typename E>  // E is the element type
-class QueueNode {
-  friend class Queue<E>;
-
- public:
-  // Gets the element in this node.
-  const E& element() const { return element_; }
-
-  // Gets the next node in the queue.
-  QueueNode* next() { return next_; }
-  const QueueNode* next() const { return next_; }
-
- private:
-  // Creates a node with a given element value.  The next pointer is
-  // set to NULL.
-  explicit QueueNode(const E& an_element)
-      : element_(an_element), next_(nullptr) {}
-
-  // We disable the default assignment operator and copy c'tor.
-  const QueueNode& operator = (const QueueNode&);
-  QueueNode(const QueueNode&);
-
-  E element_;
-  QueueNode* next_;
-};
-
-template <typename E>  // E is the element type.
-class Queue {
- public:
-  // Creates an empty queue.
-  Queue() : head_(nullptr), last_(nullptr), size_(0) {}
-
-  // D'tor.  Clears the queue.
-  ~Queue() { Clear(); }
-
-  // Clears the queue.
-  void Clear() {
-    if (size_ > 0) {
-      // 1. Deletes every node.
-      QueueNode<E>* node = head_;
-      QueueNode<E>* next = node->next();
-      for (; ;) {
-        delete node;
-        node = next;
-        if (node == nullptr) break;
-        next = node->next();
-      }
-
-      // 2. Resets the member variables.
-      head_ = last_ = nullptr;
-      size_ = 0;
-    }
-  }
-
-  // Gets the number of elements.
-  size_t Size() const { return size_; }
-
-  // Gets the first element of the queue, or NULL if the queue is empty.
-  QueueNode<E>* Head() { return head_; }
-  const QueueNode<E>* Head() const { return head_; }
-
-  // Gets the last element of the queue, or NULL if the queue is empty.
-  QueueNode<E>* Last() { return last_; }
-  const QueueNode<E>* Last() const { return last_; }
-
-  // Adds an element to the end of the queue.  A copy of the element is
-  // created using the copy constructor, and then stored in the queue.
-  // Changes made to the element in the queue doesn't affect the source
-  // object, and vice versa.
-  void Enqueue(const E& element) {
-    QueueNode<E>* new_node = new QueueNode<E>(element);
-
-    if (size_ == 0) {
-      head_ = last_ = new_node;
-      size_ = 1;
-    } else {
-      last_->next_ = new_node;
-      last_ = new_node;
-      size_++;
-    }
-  }
-
-  // Removes the head of the queue and returns it.  Returns NULL if
-  // the queue is empty.
-  E* Dequeue() {
-    if (size_ == 0) {
-      return nullptr;
-    }
-
-    const QueueNode<E>* const old_head = head_;
-    head_ = head_->next_;
-    size_--;
-    if (size_ == 0) {
-      last_ = nullptr;
-    }
-
-    E* element = new E(old_head->element());
-    delete old_head;
-
-    return element;
-  }
-
-  // Applies a function/functor on each element of the queue, and
-  // returns the result in a new queue.  The original queue is not
-  // affected.
-  template <typename F>
-  Queue* Map(F function) const {
-    Queue* new_queue = new Queue();
-    for (const QueueNode<E>* node = head_; node != nullptr;
-         node = node->next_) {
-      new_queue->Enqueue(function(node->element()));
-    }
-
-    return new_queue;
-  }
-
- private:
-  QueueNode<E>* head_;  // The first node of the queue.
-  QueueNode<E>* last_;  // The last node of the queue.
-  size_t size_;  // The number of elements in the queue.
-
-  // We disallow copying a queue.
-  Queue(const Queue&);
-  const Queue& operator = (const Queue&);
-};
-
-#endif  // GTEST_SAMPLES_SAMPLE3_INL_H_
diff --git a/3rdparty/gtest/samples/sample3_unittest.cc b/3rdparty/gtest/samples/sample3_unittest.cc
deleted file mode 100644
index b19416d5..00000000
--- a/3rdparty/gtest/samples/sample3_unittest.cc
+++ /dev/null
@@ -1,149 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-// In this example, we use a more advanced feature of Google Test called
-// test fixture.
-//
-// A test fixture is a place to hold objects and functions shared by
-// all tests in a test case.  Using a test fixture avoids duplicating
-// the test code necessary to initialize and cleanup those common
-// objects for each test.  It is also useful for defining sub-routines
-// that your tests need to invoke a lot.
-//
-// <TechnicalDetails>
-//
-// The tests share the test fixture in the sense of code sharing, not
-// data sharing.  Each test is given its own fresh copy of the
-// fixture.  You cannot expect the data modified by one test to be
-// passed on to another test, which is a bad idea.
-//
-// The reason for this design is that tests should be independent and
-// repeatable.  In particular, a test should not fail as the result of
-// another test's failure.  If one test depends on info produced by
-// another test, then the two tests should really be one big test.
-//
-// The macros for indicating the success/failure of a test
-// (EXPECT_TRUE, FAIL, etc) need to know what the current test is
-// (when Google Test prints the test result, it tells you which test
-// each failure belongs to).  Technically, these macros invoke a
-// member function of the Test class.  Therefore, you cannot use them
-// in a global function.  That's why you should put test sub-routines
-// in a test fixture.
-//
-// </TechnicalDetails>
-
-#include "sample3-inl.h"
-#include "gtest/gtest.h"
-namespace {
-// To use a test fixture, derive a class from testing::Test.
-class QueueTestSmpl3 : public testing::Test {
- protected:  // You should make the members protected s.t. they can be
-             // accessed from sub-classes.
-
-  // virtual void SetUp() will be called before each test is run.  You
-  // should define it if you need to initialize the variables.
-  // Otherwise, this can be skipped.
-  void SetUp() override {
-    q1_.Enqueue(1);
-    q2_.Enqueue(2);
-    q2_.Enqueue(3);
-  }
-
-  // virtual void TearDown() will be called after each test is run.
-  // You should define it if there is cleanup work to do.  Otherwise,
-  // you don't have to provide it.
-  //
-  // virtual void TearDown() {
-  // }
-
-  // A helper function that some test uses.
-  static int Double(int n) {
-    return 2*n;
-  }
-
-  // A helper function for testing Queue::Map().
-  void MapTester(const Queue<int> * q) {
-    // Creates a new queue, where each element is twice as big as the
-    // corresponding one in q.
-    const Queue<int> * const new_q = q->Map(Double);
-
-    // Verifies that the new queue has the same size as q.
-    ASSERT_EQ(q->Size(), new_q->Size());
-
-    // Verifies the relationship between the elements of the two queues.
-    for (const QueueNode<int>*n1 = q->Head(), *n2 = new_q->Head();
-         n1 != nullptr; n1 = n1->next(), n2 = n2->next()) {
-      EXPECT_EQ(2 * n1->element(), n2->element());
-    }
-
-    delete new_q;
-  }
-
-  // Declares the variables your tests want to use.
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-
-// When you have a test fixture, you define a test using TEST_F
-// instead of TEST.
-
-// Tests the default c'tor.
-TEST_F(QueueTestSmpl3, DefaultConstructor) {
-  // You can access data in the test fixture here.
-  EXPECT_EQ(0u, q0_.Size());
-}
-
-// Tests Dequeue().
-TEST_F(QueueTestSmpl3, Dequeue) {
-  int * n = q0_.Dequeue();
-  EXPECT_TRUE(n == nullptr);
-
-  n = q1_.Dequeue();
-  ASSERT_TRUE(n != nullptr);
-  EXPECT_EQ(1, *n);
-  EXPECT_EQ(0u, q1_.Size());
-  delete n;
-
-  n = q2_.Dequeue();
-  ASSERT_TRUE(n != nullptr);
-  EXPECT_EQ(2, *n);
-  EXPECT_EQ(1u, q2_.Size());
-  delete n;
-}
-
-// Tests the Queue::Map() function.
-TEST_F(QueueTestSmpl3, Map) {
-  MapTester(&q0_);
-  MapTester(&q1_);
-  MapTester(&q2_);
-}
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample4.cc b/3rdparty/gtest/samples/sample4.cc
deleted file mode 100644
index b0ee6093..00000000
--- a/3rdparty/gtest/samples/sample4.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-
-#include <stdio.h>
-
-#include "sample4.h"
-
-// Returns the current counter value, and increments it.
-int Counter::Increment() {
-  return counter_++;
-}
-
-// Returns the current counter value, and decrements it.
-// counter can not be less than 0, return 0 in this case
-int Counter::Decrement() {
-  if (counter_ == 0) {
-    return counter_;
-  } else  {
-    return counter_--;
-  }
-}
-
-// Prints the current counter value to STDOUT.
-void Counter::Print() const {
-  printf("%d", counter_);
-}
diff --git a/3rdparty/gtest/samples/sample4.h b/3rdparty/gtest/samples/sample4.h
deleted file mode 100644
index e256f406..00000000
--- a/3rdparty/gtest/samples/sample4.h
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// A sample program demonstrating using Google C++ testing framework.
-#ifndef GTEST_SAMPLES_SAMPLE4_H_
-#define GTEST_SAMPLES_SAMPLE4_H_
-
-// A simple monotonic counter.
-class Counter {
- private:
-  int counter_;
-
- public:
-  // Creates a counter that starts at 0.
-  Counter() : counter_(0) {}
-
-  // Returns the current counter value, and increments it.
-  int Increment();
-
-  // Returns the current counter value, and decrements it.
-  int Decrement();
-
-  // Prints the current counter value to STDOUT.
-  void Print() const;
-};
-
-#endif  // GTEST_SAMPLES_SAMPLE4_H_
diff --git a/3rdparty/gtest/samples/sample4_unittest.cc b/3rdparty/gtest/samples/sample4_unittest.cc
deleted file mode 100644
index d5144c0d..00000000
--- a/3rdparty/gtest/samples/sample4_unittest.cc
+++ /dev/null
@@ -1,53 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "sample4.h"
-#include "gtest/gtest.h"
-
-namespace {
-// Tests the Increment() method.
-
-TEST(Counter, Increment) {
-  Counter c;
-
-  // Test that counter 0 returns 0
-  EXPECT_EQ(0, c.Decrement());
-
-  // EXPECT_EQ() evaluates its arguments exactly once, so they
-  // can have side effects.
-
-  EXPECT_EQ(0, c.Increment());
-  EXPECT_EQ(1, c.Increment());
-  EXPECT_EQ(2, c.Increment());
-
-  EXPECT_EQ(3, c.Decrement());
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample5_unittest.cc b/3rdparty/gtest/samples/sample5_unittest.cc
deleted file mode 100644
index 0a21dd21..00000000
--- a/3rdparty/gtest/samples/sample5_unittest.cc
+++ /dev/null
@@ -1,196 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample teaches how to reuse a test fixture in multiple test
-// cases by deriving sub-fixtures from it.
-//
-// When you define a test fixture, you specify the name of the test
-// case that will use this fixture.  Therefore, a test fixture can
-// be used by only one test case.
-//
-// Sometimes, more than one test cases may want to use the same or
-// slightly different test fixtures.  For example, you may want to
-// make sure that all tests for a GUI library don't leak important
-// system resources like fonts and brushes.  In Google Test, you do
-// this by putting the shared logic in a super (as in "super class")
-// test fixture, and then have each test case use a fixture derived
-// from this super fixture.
-
-#include <limits.h>
-#include <time.h>
-#include "gtest/gtest.h"
-#include "sample1.h"
-#include "sample3-inl.h"
-namespace {
-// In this sample, we want to ensure that every test finishes within
-// ~5 seconds.  If a test takes longer to run, we consider it a
-// failure.
-//
-// We put the code for timing a test in a test fixture called
-// "QuickTest".  QuickTest is intended to be the super fixture that
-// other fixtures derive from, therefore there is no test case with
-// the name "QuickTest".  This is OK.
-//
-// Later, we will derive multiple test fixtures from QuickTest.
-class QuickTest : public testing::Test {
- protected:
-  // Remember that SetUp() is run immediately before a test starts.
-  // This is a good place to record the start time.
-  void SetUp() override { start_time_ = time(nullptr); }
-
-  // TearDown() is invoked immediately after a test finishes.  Here we
-  // check if the test was too slow.
-  void TearDown() override {
-    // Gets the time when the test finishes
-    const time_t end_time = time(nullptr);
-
-    // Asserts that the test took no more than ~5 seconds.  Did you
-    // know that you can use assertions in SetUp() and TearDown() as
-    // well?
-    EXPECT_TRUE(end_time - start_time_ <= 5) << "The test took too long.";
-  }
-
-  // The UTC time (in seconds) when the test starts
-  time_t start_time_;
-};
-
-
-// We derive a fixture named IntegerFunctionTest from the QuickTest
-// fixture.  All tests using this fixture will be automatically
-// required to be quick.
-class IntegerFunctionTest : public QuickTest {
-  // We don't need any more logic than already in the QuickTest fixture.
-  // Therefore the body is empty.
-};
-
-
-// Now we can write tests in the IntegerFunctionTest test case.
-
-// Tests Factorial()
-TEST_F(IntegerFunctionTest, Factorial) {
-  // Tests factorial of negative numbers.
-  EXPECT_EQ(1, Factorial(-5));
-  EXPECT_EQ(1, Factorial(-1));
-  EXPECT_GT(Factorial(-10), 0);
-
-  // Tests factorial of 0.
-  EXPECT_EQ(1, Factorial(0));
-
-  // Tests factorial of positive numbers.
-  EXPECT_EQ(1, Factorial(1));
-  EXPECT_EQ(2, Factorial(2));
-  EXPECT_EQ(6, Factorial(3));
-  EXPECT_EQ(40320, Factorial(8));
-}
-
-
-// Tests IsPrime()
-TEST_F(IntegerFunctionTest, IsPrime) {
-  // Tests negative input.
-  EXPECT_FALSE(IsPrime(-1));
-  EXPECT_FALSE(IsPrime(-2));
-  EXPECT_FALSE(IsPrime(INT_MIN));
-
-  // Tests some trivial cases.
-  EXPECT_FALSE(IsPrime(0));
-  EXPECT_FALSE(IsPrime(1));
-  EXPECT_TRUE(IsPrime(2));
-  EXPECT_TRUE(IsPrime(3));
-
-  // Tests positive input.
-  EXPECT_FALSE(IsPrime(4));
-  EXPECT_TRUE(IsPrime(5));
-  EXPECT_FALSE(IsPrime(6));
-  EXPECT_TRUE(IsPrime(23));
-}
-
-
-// The next test case (named "QueueTest") also needs to be quick, so
-// we derive another fixture from QuickTest.
-//
-// The QueueTest test fixture has some logic and shared objects in
-// addition to what's in QuickTest already.  We define the additional
-// stuff inside the body of the test fixture, as usual.
-class QueueTest : public QuickTest {
- protected:
-  void SetUp() override {
-    // First, we need to set up the super fixture (QuickTest).
-    QuickTest::SetUp();
-
-    // Second, some additional setup for this fixture.
-    q1_.Enqueue(1);
-    q2_.Enqueue(2);
-    q2_.Enqueue(3);
-  }
-
-  // By default, TearDown() inherits the behavior of
-  // QuickTest::TearDown().  As we have no additional cleaning work
-  // for QueueTest, we omit it here.
-  //
-  // virtual void TearDown() {
-  //   QuickTest::TearDown();
-  // }
-
-  Queue<int> q0_;
-  Queue<int> q1_;
-  Queue<int> q2_;
-};
-
-
-// Now, let's write tests using the QueueTest fixture.
-
-// Tests the default constructor.
-TEST_F(QueueTest, DefaultConstructor) {
-  EXPECT_EQ(0u, q0_.Size());
-}
-
-// Tests Dequeue().
-TEST_F(QueueTest, Dequeue) {
-  int* n = q0_.Dequeue();
-  EXPECT_TRUE(n == nullptr);
-
-  n = q1_.Dequeue();
-  EXPECT_TRUE(n != nullptr);
-  EXPECT_EQ(1, *n);
-  EXPECT_EQ(0u, q1_.Size());
-  delete n;
-
-  n = q2_.Dequeue();
-  EXPECT_TRUE(n != nullptr);
-  EXPECT_EQ(2, *n);
-  EXPECT_EQ(1u, q2_.Size());
-  delete n;
-}
-}  // namespace
-// If necessary, you can derive further test fixtures from a derived
-// fixture itself.  For example, you can derive another fixture from
-// QueueTest.  Google Test imposes no limit on how deep the hierarchy
-// can be.  In practice, however, you probably don't want it to be too
-// deep as to be confusing.
diff --git a/3rdparty/gtest/samples/sample6_unittest.cc b/3rdparty/gtest/samples/sample6_unittest.cc
deleted file mode 100644
index 0266e27e..00000000
--- a/3rdparty/gtest/samples/sample6_unittest.cc
+++ /dev/null
@@ -1,224 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test common properties of multiple
-// implementations of the same interface (aka interface tests).
-
-// The interface and its implementations are in this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-// First, we define some factory functions for creating instances of
-// the implementations.  You may be able to skip this step if all your
-// implementations can be constructed the same way.
-
-template <class T>
-PrimeTable* CreatePrimeTable();
-
-template <>
-PrimeTable* CreatePrimeTable<OnTheFlyPrimeTable>() {
-  return new OnTheFlyPrimeTable;
-}
-
-template <>
-PrimeTable* CreatePrimeTable<PreCalculatedPrimeTable>() {
-  return new PreCalculatedPrimeTable(10000);
-}
-
-// Then we define a test fixture class template.
-template <class T>
-class PrimeTableTest : public testing::Test {
- protected:
-  // The ctor calls the factory function to create a prime table
-  // implemented by T.
-  PrimeTableTest() : table_(CreatePrimeTable<T>()) {}
-
-  ~PrimeTableTest() override { delete table_; }
-
-  // Note that we test an implementation via the base interface
-  // instead of the actual implementation class.  This is important
-  // for keeping the tests close to the real world scenario, where the
-  // implementation is invoked via the base interface.  It avoids
-  // got-yas where the implementation class has a method that shadows
-  // a method with the same name (but slightly different argument
-  // types) in the base interface, for example.
-  PrimeTable* const table_;
-};
-
-#if GTEST_HAS_TYPED_TEST
-
-using testing::Types;
-
-// Google Test offers two ways for reusing tests for different types.
-// The first is called "typed tests".  You should use it if you
-// already know *all* the types you are gonna exercise when you write
-// the tests.
-
-// To write a typed test case, first use
-//
-//   TYPED_TEST_SUITE(TestCaseName, TypeList);
-//
-// to declare it and specify the type parameters.  As with TEST_F,
-// TestCaseName must match the test fixture name.
-
-// The list of types we want to test.
-typedef Types<OnTheFlyPrimeTable, PreCalculatedPrimeTable> Implementations;
-
-TYPED_TEST_SUITE(PrimeTableTest, Implementations);
-
-// Then use TYPED_TEST(TestCaseName, TestName) to define a typed test,
-// similar to TEST_F.
-TYPED_TEST(PrimeTableTest, ReturnsFalseForNonPrimes) {
-  // Inside the test body, you can refer to the type parameter by
-  // TypeParam, and refer to the fixture class by TestFixture.  We
-  // don't need them in this example.
-
-  // Since we are in the template world, C++ requires explicitly
-  // writing 'this->' when referring to members of the fixture class.
-  // This is something you have to learn to live with.
-  EXPECT_FALSE(this->table_->IsPrime(-5));
-  EXPECT_FALSE(this->table_->IsPrime(0));
-  EXPECT_FALSE(this->table_->IsPrime(1));
-  EXPECT_FALSE(this->table_->IsPrime(4));
-  EXPECT_FALSE(this->table_->IsPrime(6));
-  EXPECT_FALSE(this->table_->IsPrime(100));
-}
-
-TYPED_TEST(PrimeTableTest, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(this->table_->IsPrime(2));
-  EXPECT_TRUE(this->table_->IsPrime(3));
-  EXPECT_TRUE(this->table_->IsPrime(5));
-  EXPECT_TRUE(this->table_->IsPrime(7));
-  EXPECT_TRUE(this->table_->IsPrime(11));
-  EXPECT_TRUE(this->table_->IsPrime(131));
-}
-
-TYPED_TEST(PrimeTableTest, CanGetNextPrime) {
-  EXPECT_EQ(2, this->table_->GetNextPrime(0));
-  EXPECT_EQ(3, this->table_->GetNextPrime(2));
-  EXPECT_EQ(5, this->table_->GetNextPrime(3));
-  EXPECT_EQ(7, this->table_->GetNextPrime(5));
-  EXPECT_EQ(11, this->table_->GetNextPrime(7));
-  EXPECT_EQ(131, this->table_->GetNextPrime(128));
-}
-
-// That's it!  Google Test will repeat each TYPED_TEST for each type
-// in the type list specified in TYPED_TEST_SUITE.  Sit back and be
-// happy that you don't have to define them multiple times.
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-#if GTEST_HAS_TYPED_TEST_P
-
-using testing::Types;
-
-// Sometimes, however, you don't yet know all the types that you want
-// to test when you write the tests.  For example, if you are the
-// author of an interface and expect other people to implement it, you
-// might want to write a set of tests to make sure each implementation
-// conforms to some basic requirements, but you don't know what
-// implementations will be written in the future.
-//
-// How can you write the tests without committing to the type
-// parameters?  That's what "type-parameterized tests" can do for you.
-// It is a bit more involved than typed tests, but in return you get a
-// test pattern that can be reused in many contexts, which is a big
-// win.  Here's how you do it:
-
-// First, define a test fixture class template.  Here we just reuse
-// the PrimeTableTest fixture defined earlier:
-
-template <class T>
-class PrimeTableTest2 : public PrimeTableTest<T> {
-};
-
-// Then, declare the test case.  The argument is the name of the test
-// fixture, and also the name of the test case (as usual).  The _P
-// suffix is for "parameterized" or "pattern".
-TYPED_TEST_SUITE_P(PrimeTableTest2);
-
-// Next, use TYPED_TEST_P(TestCaseName, TestName) to define a test,
-// similar to what you do with TEST_F.
-TYPED_TEST_P(PrimeTableTest2, ReturnsFalseForNonPrimes) {
-  EXPECT_FALSE(this->table_->IsPrime(-5));
-  EXPECT_FALSE(this->table_->IsPrime(0));
-  EXPECT_FALSE(this->table_->IsPrime(1));
-  EXPECT_FALSE(this->table_->IsPrime(4));
-  EXPECT_FALSE(this->table_->IsPrime(6));
-  EXPECT_FALSE(this->table_->IsPrime(100));
-}
-
-TYPED_TEST_P(PrimeTableTest2, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(this->table_->IsPrime(2));
-  EXPECT_TRUE(this->table_->IsPrime(3));
-  EXPECT_TRUE(this->table_->IsPrime(5));
-  EXPECT_TRUE(this->table_->IsPrime(7));
-  EXPECT_TRUE(this->table_->IsPrime(11));
-  EXPECT_TRUE(this->table_->IsPrime(131));
-}
-
-TYPED_TEST_P(PrimeTableTest2, CanGetNextPrime) {
-  EXPECT_EQ(2, this->table_->GetNextPrime(0));
-  EXPECT_EQ(3, this->table_->GetNextPrime(2));
-  EXPECT_EQ(5, this->table_->GetNextPrime(3));
-  EXPECT_EQ(7, this->table_->GetNextPrime(5));
-  EXPECT_EQ(11, this->table_->GetNextPrime(7));
-  EXPECT_EQ(131, this->table_->GetNextPrime(128));
-}
-
-// Type-parameterized tests involve one extra step: you have to
-// enumerate the tests you defined:
-REGISTER_TYPED_TEST_SUITE_P(
-    PrimeTableTest2,  // The first argument is the test case name.
-    // The rest of the arguments are the test names.
-    ReturnsFalseForNonPrimes, ReturnsTrueForPrimes, CanGetNextPrime);
-
-// At this point the test pattern is done.  However, you don't have
-// any real test yet as you haven't said which types you want to run
-// the tests with.
-
-// To turn the abstract test pattern into real tests, you instantiate
-// it with a list of types.  Usually the test pattern will be defined
-// in a .h file, and anyone can #include and instantiate it.  You can
-// even instantiate it more than once in the same program.  To tell
-// different instances apart, you give each of them a name, which will
-// become part of the test case name and can be used in test filters.
-
-// The list of types we want to test.  Note that it doesn't have to be
-// defined at the time we write the TYPED_TEST_P()s.
-typedef Types<OnTheFlyPrimeTable, PreCalculatedPrimeTable>
-    PrimeTableImplementations;
-INSTANTIATE_TYPED_TEST_SUITE_P(OnTheFlyAndPreCalculated,    // Instance name
-                               PrimeTableTest2,             // Test case name
-                               PrimeTableImplementations);  // Type list
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample7_unittest.cc b/3rdparty/gtest/samples/sample7_unittest.cc
deleted file mode 100644
index e0efc29e..00000000
--- a/3rdparty/gtest/samples/sample7_unittest.cc
+++ /dev/null
@@ -1,117 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test common properties of multiple
-// implementations of an interface (aka interface tests) using
-// value-parameterized tests. Each test in the test case has
-// a parameter that is an interface pointer to an implementation
-// tested.
-
-// The interface and its implementations are in this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-
-using ::testing::TestWithParam;
-using ::testing::Values;
-
-// As a general rule, to prevent a test from affecting the tests that come
-// after it, you should create and destroy the tested objects for each test
-// instead of reusing them.  In this sample we will define a simple factory
-// function for PrimeTable objects.  We will instantiate objects in test's
-// SetUp() method and delete them in TearDown() method.
-typedef PrimeTable* CreatePrimeTableFunc();
-
-PrimeTable* CreateOnTheFlyPrimeTable() {
-  return new OnTheFlyPrimeTable();
-}
-
-template <size_t max_precalculated>
-PrimeTable* CreatePreCalculatedPrimeTable() {
-  return new PreCalculatedPrimeTable(max_precalculated);
-}
-
-// Inside the test body, fixture constructor, SetUp(), and TearDown() you
-// can refer to the test parameter by GetParam().  In this case, the test
-// parameter is a factory function which we call in fixture's SetUp() to
-// create and store an instance of PrimeTable.
-class PrimeTableTestSmpl7 : public TestWithParam<CreatePrimeTableFunc*> {
- public:
-  ~PrimeTableTestSmpl7() override { delete table_; }
-  void SetUp() override { table_ = (*GetParam())(); }
-  void TearDown() override {
-    delete table_;
-    table_ = nullptr;
-  }
-
- protected:
-  PrimeTable* table_;
-};
-
-TEST_P(PrimeTableTestSmpl7, ReturnsFalseForNonPrimes) {
-  EXPECT_FALSE(table_->IsPrime(-5));
-  EXPECT_FALSE(table_->IsPrime(0));
-  EXPECT_FALSE(table_->IsPrime(1));
-  EXPECT_FALSE(table_->IsPrime(4));
-  EXPECT_FALSE(table_->IsPrime(6));
-  EXPECT_FALSE(table_->IsPrime(100));
-}
-
-TEST_P(PrimeTableTestSmpl7, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(table_->IsPrime(2));
-  EXPECT_TRUE(table_->IsPrime(3));
-  EXPECT_TRUE(table_->IsPrime(5));
-  EXPECT_TRUE(table_->IsPrime(7));
-  EXPECT_TRUE(table_->IsPrime(11));
-  EXPECT_TRUE(table_->IsPrime(131));
-}
-
-TEST_P(PrimeTableTestSmpl7, CanGetNextPrime) {
-  EXPECT_EQ(2, table_->GetNextPrime(0));
-  EXPECT_EQ(3, table_->GetNextPrime(2));
-  EXPECT_EQ(5, table_->GetNextPrime(3));
-  EXPECT_EQ(7, table_->GetNextPrime(5));
-  EXPECT_EQ(11, table_->GetNextPrime(7));
-  EXPECT_EQ(131, table_->GetNextPrime(128));
-}
-
-// In order to run value-parameterized tests, you need to instantiate them,
-// or bind them to a list of values which will be used as test parameters.
-// You can instantiate them in a different translation module, or even
-// instantiate them several times.
-//
-// Here, we instantiate our tests with a list of two PrimeTable object
-// factory functions:
-INSTANTIATE_TEST_SUITE_P(OnTheFlyAndPreCalculated, PrimeTableTestSmpl7,
-                         Values(&CreateOnTheFlyPrimeTable,
-                                &CreatePreCalculatedPrimeTable<1000>));
-
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample8_unittest.cc b/3rdparty/gtest/samples/sample8_unittest.cc
deleted file mode 100644
index 10488b0e..00000000
--- a/3rdparty/gtest/samples/sample8_unittest.cc
+++ /dev/null
@@ -1,154 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to test code relying on some global flag variables.
-// Combine() helps with generating all possible combinations of such flags,
-// and each test is given one combination as a parameter.
-
-// Use class definitions to test from this header.
-#include "prime_tables.h"
-
-#include "gtest/gtest.h"
-namespace {
-
-// Suppose we want to introduce a new, improved implementation of PrimeTable
-// which combines speed of PrecalcPrimeTable and versatility of
-// OnTheFlyPrimeTable (see prime_tables.h). Inside it instantiates both
-// PrecalcPrimeTable and OnTheFlyPrimeTable and uses the one that is more
-// appropriate under the circumstances. But in low memory conditions, it can be
-// told to instantiate without PrecalcPrimeTable instance at all and use only
-// OnTheFlyPrimeTable.
-class HybridPrimeTable : public PrimeTable {
- public:
-  HybridPrimeTable(bool force_on_the_fly, int max_precalculated)
-      : on_the_fly_impl_(new OnTheFlyPrimeTable),
-        precalc_impl_(force_on_the_fly
-                          ? nullptr
-                          : new PreCalculatedPrimeTable(max_precalculated)),
-        max_precalculated_(max_precalculated) {}
-  ~HybridPrimeTable() override {
-    delete on_the_fly_impl_;
-    delete precalc_impl_;
-  }
-
-  bool IsPrime(int n) const override {
-    if (precalc_impl_ != nullptr && n < max_precalculated_)
-      return precalc_impl_->IsPrime(n);
-    else
-      return on_the_fly_impl_->IsPrime(n);
-  }
-
-  int GetNextPrime(int p) const override {
-    int next_prime = -1;
-    if (precalc_impl_ != nullptr && p < max_precalculated_)
-      next_prime = precalc_impl_->GetNextPrime(p);
-
-    return next_prime != -1 ? next_prime : on_the_fly_impl_->GetNextPrime(p);
-  }
-
- private:
-  OnTheFlyPrimeTable* on_the_fly_impl_;
-  PreCalculatedPrimeTable* precalc_impl_;
-  int max_precalculated_;
-};
-
-using ::testing::TestWithParam;
-using ::testing::Bool;
-using ::testing::Values;
-using ::testing::Combine;
-
-// To test all code paths for HybridPrimeTable we must test it with numbers
-// both within and outside PreCalculatedPrimeTable's capacity and also with
-// PreCalculatedPrimeTable disabled. We do this by defining fixture which will
-// accept different combinations of parameters for instantiating a
-// HybridPrimeTable instance.
-class PrimeTableTest : public TestWithParam< ::std::tuple<bool, int> > {
- protected:
-  void SetUp() override {
-    bool force_on_the_fly;
-    int max_precalculated;
-    std::tie(force_on_the_fly, max_precalculated) = GetParam();
-    table_ = new HybridPrimeTable(force_on_the_fly, max_precalculated);
-  }
-  void TearDown() override {
-    delete table_;
-    table_ = nullptr;
-  }
-  HybridPrimeTable* table_;
-};
-
-TEST_P(PrimeTableTest, ReturnsFalseForNonPrimes) {
-  // Inside the test body, you can refer to the test parameter by GetParam().
-  // In this case, the test parameter is a PrimeTable interface pointer which
-  // we can use directly.
-  // Please note that you can also save it in the fixture's SetUp() method
-  // or constructor and use saved copy in the tests.
-
-  EXPECT_FALSE(table_->IsPrime(-5));
-  EXPECT_FALSE(table_->IsPrime(0));
-  EXPECT_FALSE(table_->IsPrime(1));
-  EXPECT_FALSE(table_->IsPrime(4));
-  EXPECT_FALSE(table_->IsPrime(6));
-  EXPECT_FALSE(table_->IsPrime(100));
-}
-
-TEST_P(PrimeTableTest, ReturnsTrueForPrimes) {
-  EXPECT_TRUE(table_->IsPrime(2));
-  EXPECT_TRUE(table_->IsPrime(3));
-  EXPECT_TRUE(table_->IsPrime(5));
-  EXPECT_TRUE(table_->IsPrime(7));
-  EXPECT_TRUE(table_->IsPrime(11));
-  EXPECT_TRUE(table_->IsPrime(131));
-}
-
-TEST_P(PrimeTableTest, CanGetNextPrime) {
-  EXPECT_EQ(2, table_->GetNextPrime(0));
-  EXPECT_EQ(3, table_->GetNextPrime(2));
-  EXPECT_EQ(5, table_->GetNextPrime(3));
-  EXPECT_EQ(7, table_->GetNextPrime(5));
-  EXPECT_EQ(11, table_->GetNextPrime(7));
-  EXPECT_EQ(131, table_->GetNextPrime(128));
-}
-
-// In order to run value-parameterized tests, you need to instantiate them,
-// or bind them to a list of values which will be used as test parameters.
-// You can instantiate them in a different translation module, or even
-// instantiate them several times.
-//
-// Here, we instantiate our tests with a list of parameters. We must combine
-// all variations of the boolean flag suppressing PrecalcPrimeTable and some
-// meaningful values for tests. We choose a small value (1), and a value that
-// will put some of the tested numbers beyond the capability of the
-// PrecalcPrimeTable instance and some inside it (10). Combine will produce all
-// possible combinations.
-INSTANTIATE_TEST_SUITE_P(MeaningfulTestParameters, PrimeTableTest,
-                         Combine(Bool(), Values(1, 10)));
-
-}  // namespace
diff --git a/3rdparty/gtest/samples/sample9_unittest.cc b/3rdparty/gtest/samples/sample9_unittest.cc
deleted file mode 100644
index e502d08d..00000000
--- a/3rdparty/gtest/samples/sample9_unittest.cc
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2009 Google Inc. All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This sample shows how to use Google Test listener API to implement
-// an alternative console output and how to use the UnitTest reflection API
-// to enumerate test cases and tests and to inspect their results.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestCase;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-namespace {
-// Provides alternative output mode which produces minimal amount of
-// information about tests.
-class TersePrinter : public EmptyTestEventListener {
- private:
-  // Called before any test activity starts.
-  void OnTestProgramStart(const UnitTest& /* unit_test */) override {}
-
-  // Called after all test activities have ended.
-  void OnTestProgramEnd(const UnitTest& unit_test) override {
-    fprintf(stdout, "TEST %s\n", unit_test.Passed() ? "PASSED" : "FAILED");
-    fflush(stdout);
-  }
-
-  // Called before a test starts.
-  void OnTestStart(const TestInfo& test_info) override {
-    fprintf(stdout,
-            "*** Test %s.%s starting.\n",
-            test_info.test_case_name(),
-            test_info.name());
-    fflush(stdout);
-  }
-
-  // Called after a failed assertion or a SUCCEED() invocation.
-  void OnTestPartResult(const TestPartResult& test_part_result) override {
-    fprintf(stdout,
-            "%s in %s:%d\n%s\n",
-            test_part_result.failed() ? "*** Failure" : "Success",
-            test_part_result.file_name(),
-            test_part_result.line_number(),
-            test_part_result.summary());
-    fflush(stdout);
-  }
-
-  // Called after a test ends.
-  void OnTestEnd(const TestInfo& test_info) override {
-    fprintf(stdout,
-            "*** Test %s.%s ending.\n",
-            test_info.test_case_name(),
-            test_info.name());
-    fflush(stdout);
-  }
-};  // class TersePrinter
-
-TEST(CustomOutputTest, PrintsMessage) {
-  printf("Printing something from the test body...\n");
-}
-
-TEST(CustomOutputTest, Succeeds) {
-  SUCCEED() << "SUCCEED() has been invoked from here";
-}
-
-TEST(CustomOutputTest, Fails) {
-  EXPECT_EQ(1, 2)
-      << "This test fails in order to demonstrate alternative failure messages";
-}
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  bool terse_output = false;
-  if (argc > 1 && strcmp(argv[1], "--terse_output") == 0 )
-    terse_output = true;
-  else
-    printf("%s\n", "Run this program with --terse_output to change the way "
-           "it prints its output.");
-
-  UnitTest& unit_test = *UnitTest::GetInstance();
-
-  // If we are given the --terse_output command line flag, suppresses the
-  // standard output and attaches own result printer.
-  if (terse_output) {
-    TestEventListeners& listeners = unit_test.listeners();
-
-    // Removes the default console output listener from the list so it will
-    // not receive events from Google Test and won't print any output. Since
-    // this operation transfers ownership of the listener to the caller we
-    // have to delete it as well.
-    delete listeners.Release(listeners.default_result_printer());
-
-    // Adds the custom output listener to the list. It will now receive
-    // events from Google Test and print the alternative output. We don't
-    // have to worry about deleting it since Google Test assumes ownership
-    // over it after adding it to the list.
-    listeners.Append(new TersePrinter);
-  }
-  int ret_val = RUN_ALL_TESTS();
-
-  // This is an example of using the UnitTest reflection API to inspect test
-  // results. Here we discount failures from the tests we expected to fail.
-  int unexpectedly_failed_tests = 0;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const testing::TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      // Counts failed tests that were not meant to fail (those without
-      // 'Fails' in the name).
-      if (test_info.result()->Failed() &&
-          strcmp(test_info.name(), "Fails") != 0) {
-        unexpectedly_failed_tests++;
-      }
-    }
-  }
-
-  // Test that were meant to fail should not affect the test program outcome.
-  if (unexpectedly_failed_tests == 0)
-    ret_val = 0;
-
-  return ret_val;
-}
diff --git a/3rdparty/gtest/scripts/common.py b/3rdparty/gtest/scripts/common.py
deleted file mode 100644
index 3c0347a7..00000000
--- a/3rdparty/gtest/scripts/common.py
+++ /dev/null
@@ -1,83 +0,0 @@
-# Copyright 2013 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Shared utilities for writing scripts for Google Test/Mock."""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-
-import os
-import re
-
-
-# Matches the line from 'svn info .' output that describes what SVN
-# path the current local directory corresponds to.  For example, in
-# a googletest SVN workspace's trunk/test directory, the output will be:
-#
-# URL: https://googletest.googlecode.com/svn/trunk/test
-_SVN_INFO_URL_RE = re.compile(r'^URL: https://(\w+)\.googlecode\.com/svn(.*)')
-
-
-def GetCommandOutput(command):
-  """Runs the shell command and returns its stdout as a list of lines."""
-
-  f = os.popen(command, 'r')
-  lines = [line.strip() for line in f.readlines()]
-  f.close()
-  return lines
-
-
-def GetSvnInfo():
-  """Returns the project name and the current SVN workspace's root path."""
-
-  for line in GetCommandOutput('svn info .'):
-    m = _SVN_INFO_URL_RE.match(line)
-    if m:
-      project = m.group(1)  # googletest or googlemock
-      rel_path = m.group(2)
-      root = os.path.realpath(rel_path.count('/') * '../')
-      return project, root
-
-  return None, None
-
-
-def GetSvnTrunk():
-  """Returns the current SVN workspace's trunk root path."""
-
-  _, root = GetSvnInfo()
-  return root + '/trunk' if root else None
-
-
-def IsInGTestSvn():
-  project, _ = GetSvnInfo()
-  return project == 'googletest'
-
-
-def IsInGMockSvn():
-  project, _ = GetSvnInfo()
-  return project == 'googlemock'
diff --git a/3rdparty/gtest/scripts/fuse_gtest_files.py b/3rdparty/gtest/scripts/fuse_gtest_files.py
deleted file mode 100644
index d0dd464f..00000000
--- a/3rdparty/gtest/scripts/fuse_gtest_files.py
+++ /dev/null
@@ -1,253 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""fuse_gtest_files.py v0.2.0
-Fuses Google Test source code into a .h file and a .cc file.
-
-SYNOPSIS
-       fuse_gtest_files.py [GTEST_ROOT_DIR] OUTPUT_DIR
-
-       Scans GTEST_ROOT_DIR for Google Test source code, and generates
-       two files: OUTPUT_DIR/gtest/gtest.h and OUTPUT_DIR/gtest/gtest-all.cc.
-       Then you can build your tests by adding OUTPUT_DIR to the include
-       search path and linking with OUTPUT_DIR/gtest/gtest-all.cc.  These
-       two files contain everything you need to use Google Test.  Hence
-       you can "install" Google Test by copying them to wherever you want.
-
-       GTEST_ROOT_DIR can be omitted and defaults to the parent
-       directory of the directory holding this script.
-
-EXAMPLES
-       ./fuse_gtest_files.py fused_gtest
-       ./fuse_gtest_files.py path/to/unpacked/gtest fused_gtest
-
-This tool is experimental.  In particular, it assumes that there is no
-conditional inclusion of Google Test headers.  Please report any
-problems to googletestframework@googlegroups.com.  You can read
-https://github.com/google/googletest/blob/master/googletest/docs/advanced.md for
-more information.
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import re
-try:
-  from sets import Set as set  # For Python 2.3 compatibility
-except ImportError:
-  pass
-import sys
-
-# We assume that this file is in the scripts/ directory in the Google
-# Test root directory.
-DEFAULT_GTEST_ROOT_DIR = os.path.join(os.path.dirname(__file__), '..')
-
-# Regex for matching '#include "gtest/..."'.
-INCLUDE_GTEST_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(gtest/.+)"')
-
-# Regex for matching '#include "src/..."'.
-INCLUDE_SRC_FILE_REGEX = re.compile(r'^\s*#\s*include\s*"(src/.+)"')
-
-# Where to find the source seed files.
-GTEST_H_SEED = 'include/gtest/gtest.h'
-GTEST_SPI_H_SEED = 'include/gtest/gtest-spi.h'
-GTEST_ALL_CC_SEED = 'src/gtest-all.cc'
-
-# Where to put the generated files.
-GTEST_H_OUTPUT = 'gtest/gtest.h'
-GTEST_ALL_CC_OUTPUT = 'gtest/gtest-all.cc'
-
-
-def VerifyFileExists(directory, relative_path):
-  """Verifies that the given file exists; aborts on failure.
-
-  relative_path is the file path relative to the given directory.
-  """
-
-  if not os.path.isfile(os.path.join(directory, relative_path)):
-    print('ERROR: Cannot find %s in directory %s.' % (relative_path,
-                                                      directory))
-    print('Please either specify a valid project root directory '
-          'or omit it on the command line.')
-    sys.exit(1)
-
-
-def ValidateGTestRootDir(gtest_root):
-  """Makes sure gtest_root points to a valid gtest root directory.
-
-  The function aborts the program on failure.
-  """
-
-  VerifyFileExists(gtest_root, GTEST_H_SEED)
-  VerifyFileExists(gtest_root, GTEST_ALL_CC_SEED)
-
-
-def VerifyOutputFile(output_dir, relative_path):
-  """Verifies that the given output file path is valid.
-
-  relative_path is relative to the output_dir directory.
-  """
-
-  # Makes sure the output file either doesn't exist or can be overwritten.
-  output_file = os.path.join(output_dir, relative_path)
-  if os.path.exists(output_file):
-    # TODO(wan@google.com): The following user-interaction doesn't
-    # work with automated processes.  We should provide a way for the
-    # Makefile to force overwriting the files.
-    print('%s already exists in directory %s - overwrite it? (y/N) ' %
-          (relative_path, output_dir))
-    answer = sys.stdin.readline().strip()
-    if answer not in ['y', 'Y']:
-      print('ABORTED.')
-      sys.exit(1)
-
-  # Makes sure the directory holding the output file exists; creates
-  # it and all its ancestors if necessary.
-  parent_directory = os.path.dirname(output_file)
-  if not os.path.isdir(parent_directory):
-    os.makedirs(parent_directory)
-
-
-def ValidateOutputDir(output_dir):
-  """Makes sure output_dir points to a valid output directory.
-
-  The function aborts the program on failure.
-  """
-
-  VerifyOutputFile(output_dir, GTEST_H_OUTPUT)
-  VerifyOutputFile(output_dir, GTEST_ALL_CC_OUTPUT)
-
-
-def FuseGTestH(gtest_root, output_dir):
-  """Scans folder gtest_root to generate gtest/gtest.h in output_dir."""
-
-  output_file = open(os.path.join(output_dir, GTEST_H_OUTPUT), 'w')
-  processed_files = set()  # Holds all gtest headers we've processed.
-
-  def ProcessFile(gtest_header_path):
-    """Processes the given gtest header file."""
-
-    # We don't process the same header twice.
-    if gtest_header_path in processed_files:
-      return
-
-    processed_files.add(gtest_header_path)
-
-    # Reads each line in the given gtest header.
-    for line in open(os.path.join(gtest_root, gtest_header_path), 'r'):
-      m = INCLUDE_GTEST_FILE_REGEX.match(line)
-      if m:
-        # It's '#include "gtest/..."' - let's process it recursively.
-        ProcessFile('include/' + m.group(1))
-      else:
-        # Otherwise we copy the line unchanged to the output file.
-        output_file.write(line)
-
-  ProcessFile(GTEST_H_SEED)
-  output_file.close()
-
-
-def FuseGTestAllCcToFile(gtest_root, output_file):
-  """Scans folder gtest_root to generate gtest/gtest-all.cc in output_file."""
-
-  processed_files = set()
-
-  def ProcessFile(gtest_source_file):
-    """Processes the given gtest source file."""
-
-    # We don't process the same #included file twice.
-    if gtest_source_file in processed_files:
-      return
-
-    processed_files.add(gtest_source_file)
-
-    # Reads each line in the given gtest source file.
-    for line in open(os.path.join(gtest_root, gtest_source_file), 'r'):
-      m = INCLUDE_GTEST_FILE_REGEX.match(line)
-      if m:
-        if 'include/' + m.group(1) == GTEST_SPI_H_SEED:
-          # It's '#include "gtest/gtest-spi.h"'.  This file is not
-          # #included by "gtest/gtest.h", so we need to process it.
-          ProcessFile(GTEST_SPI_H_SEED)
-        else:
-          # It's '#include "gtest/foo.h"' where foo is not gtest-spi.
-          # We treat it as '#include "gtest/gtest.h"', as all other
-          # gtest headers are being fused into gtest.h and cannot be
-          # #included directly.
-
-          # There is no need to #include "gtest/gtest.h" more than once.
-          if not GTEST_H_SEED in processed_files:
-            processed_files.add(GTEST_H_SEED)
-            output_file.write('#include "%s"\n' % (GTEST_H_OUTPUT,))
-      else:
-        m = INCLUDE_SRC_FILE_REGEX.match(line)
-        if m:
-          # It's '#include "src/foo"' - let's process it recursively.
-          ProcessFile(m.group(1))
-        else:
-          output_file.write(line)
-
-  ProcessFile(GTEST_ALL_CC_SEED)
-
-
-def FuseGTestAllCc(gtest_root, output_dir):
-  """Scans folder gtest_root to generate gtest/gtest-all.cc in output_dir."""
-
-  output_file = open(os.path.join(output_dir, GTEST_ALL_CC_OUTPUT), 'w')
-  FuseGTestAllCcToFile(gtest_root, output_file)
-  output_file.close()
-
-
-def FuseGTest(gtest_root, output_dir):
-  """Fuses gtest.h and gtest-all.cc."""
-
-  ValidateGTestRootDir(gtest_root)
-  ValidateOutputDir(output_dir)
-
-  FuseGTestH(gtest_root, output_dir)
-  FuseGTestAllCc(gtest_root, output_dir)
-
-
-def main():
-  argc = len(sys.argv)
-  if argc == 2:
-    # fuse_gtest_files.py OUTPUT_DIR
-    FuseGTest(DEFAULT_GTEST_ROOT_DIR, sys.argv[1])
-  elif argc == 3:
-    # fuse_gtest_files.py GTEST_ROOT_DIR OUTPUT_DIR
-    FuseGTest(sys.argv[1], sys.argv[2])
-  else:
-    print(__doc__)
-    sys.exit(1)
-
-
-if __name__ == '__main__':
-  main()
diff --git a/3rdparty/gtest/scripts/gen_gtest_pred_impl.py b/3rdparty/gtest/scripts/gen_gtest_pred_impl.py
deleted file mode 100644
index b43efdf4..00000000
--- a/3rdparty/gtest/scripts/gen_gtest_pred_impl.py
+++ /dev/null
@@ -1,730 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""gen_gtest_pred_impl.py v0.1
-
-Generates the implementation of Google Test predicate assertions and
-accompanying tests.
-
-Usage:
-
-  gen_gtest_pred_impl.py MAX_ARITY
-
-where MAX_ARITY is a positive integer.
-
-The command generates the implementation of up-to MAX_ARITY-ary
-predicate assertions, and writes it to file gtest_pred_impl.h in the
-directory where the script is.  It also generates the accompanying
-unit test in file gtest_pred_impl_unittest.cc.
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import sys
-import time
-
-# Where this script is.
-SCRIPT_DIR = os.path.dirname(sys.argv[0])
-
-# Where to store the generated header.
-HEADER = os.path.join(SCRIPT_DIR, '../include/gtest/gtest_pred_impl.h')
-
-# Where to store the generated unit test.
-UNIT_TEST = os.path.join(SCRIPT_DIR, '../test/gtest_pred_impl_unittest.cc')
-
-
-def HeaderPreamble(n):
-  """Returns the preamble for the header file.
-
-  Args:
-    n:  the maximum arity of the predicate macros to be generated.
-  """
-
-  # A map that defines the values used in the preamble template.
-  DEFS = {
-    'today' : time.strftime('%m/%d/%Y'),
-    'year' : time.strftime('%Y'),
-    'command' : '%s %s' % (os.path.basename(sys.argv[0]), n),
-    'n' : n
-    }
-
-  return (
-"""// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on %(today)s by command
-// '%(command)s'.  DO NOT EDIT BY HAND!
-//
-// Implements a family of generic predicate assertion macros.
-
-#ifndef GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-#define GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-
-#include "gtest/gtest.h"
-
-namespace testing {
-
-// This header implements a family of generic predicate assertion
-// macros:
-//
-//   ASSERT_PRED_FORMAT1(pred_format, v1)
-//   ASSERT_PRED_FORMAT2(pred_format, v1, v2)
-//   ...
-//
-// where pred_format is a function or functor that takes n (in the
-// case of ASSERT_PRED_FORMATn) values and their source expression
-// text, and returns a testing::AssertionResult.  See the definition
-// of ASSERT_EQ in gtest.h for an example.
-//
-// If you don't care about formatting, you can use the more
-// restrictive version:
-//
-//   ASSERT_PRED1(pred, v1)
-//   ASSERT_PRED2(pred, v1, v2)
-//   ...
-//
-// where pred is an n-ary function or functor that returns bool,
-// and the values v1, v2, ..., must support the << operator for
-// streaming to std::ostream.
-//
-// We also define the EXPECT_* variations.
-//
-// For now we only support predicates whose arity is at most %(n)s.
-// Please email googletestframework@googlegroups.com if you need
-// support for higher arities.
-
-// GTEST_ASSERT_ is the basic statement to which all of the assertions
-// in this file reduce.  Don't use this in your code.
-
-#define GTEST_ASSERT_(expression, on_failure) \\
-  GTEST_AMBIGUOUS_ELSE_BLOCKER_ \\
-  if (const ::testing::AssertionResult gtest_ar = (expression)) \\
-    ; \\
-  else \\
-    on_failure(gtest_ar.failure_message())
-""" % DEFS)
-
-
-def Arity(n):
-  """Returns the English name of the given arity."""
-
-  if n < 0:
-    return None
-  elif n <= 3:
-    return ['nullary', 'unary', 'binary', 'ternary'][n]
-  else:
-    return '%s-ary' % n
-
-
-def Title(word):
-  """Returns the given word in title case.  The difference between
-  this and string's title() method is that Title('4-ary') is '4-ary'
-  while '4-ary'.title() is '4-Ary'."""
-
-  return word[0].upper() + word[1:]
-
-
-def OneTo(n):
-  """Returns the list [1, 2, 3, ..., n]."""
-
-  return range(1, n + 1)
-
-
-def Iter(n, format, sep=''):
-  """Given a positive integer n, a format string that contains 0 or
-  more '%s' format specs, and optionally a separator string, returns
-  the join of n strings, each formatted with the format string on an
-  iterator ranged from 1 to n.
-
-  Example:
-
-  Iter(3, 'v%s', sep=', ') returns 'v1, v2, v3'.
-  """
-
-  # How many '%s' specs are in format?
-  spec_count = len(format.split('%s')) - 1
-  return sep.join([format % (spec_count * (i,)) for i in OneTo(n)])
-
-
-def ImplementationForArity(n):
-  """Returns the implementation of n-ary predicate assertions."""
-
-  # A map the defines the values used in the implementation template.
-  DEFS = {
-    'n' : str(n),
-    'vs' : Iter(n, 'v%s', sep=', '),
-    'vts' : Iter(n, '#v%s', sep=', '),
-    'arity' : Arity(n),
-    'Arity' : Title(Arity(n))
-    }
-
-  impl = """
-
-// Helper function for implementing {EXPECT|ASSERT}_PRED%(n)s.  Don't use
-// this in your code.
-template <typename Pred""" % DEFS
-
-  impl += Iter(n, """,
-          typename T%s""")
-
-  impl += """>
-AssertionResult AssertPred%(n)sHelper(const char* pred_text""" % DEFS
-
-  impl += Iter(n, """,
-                                  const char* e%s""")
-
-  impl += """,
-                                  Pred pred"""
-
-  impl += Iter(n, """,
-                                  const T%s& v%s""")
-
-  impl += """) {
-  if (pred(%(vs)s)) return AssertionSuccess();
-
-""" % DEFS
-
-  impl += '  return AssertionFailure() << pred_text << "("'
-
-  impl += Iter(n, """
-                            << e%s""", sep=' << ", "')
-
-  impl += ' << ") evaluates to false, where"'
-
-  impl += Iter(n, """
-                            << "\\n" << e%s << " evaluates to " << v%s""")
-
-  impl += """;
-}
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED_FORMAT%(n)s.
-// Don't use this in your code.
-#define GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, on_failure)\\
-  GTEST_ASSERT_(pred_format(%(vts)s, %(vs)s), \\
-                on_failure)
-
-// Internal macro for implementing {EXPECT|ASSERT}_PRED%(n)s.  Don't use
-// this in your code.
-#define GTEST_PRED%(n)s_(pred, %(vs)s, on_failure)\\
-  GTEST_ASSERT_(::testing::AssertPred%(n)sHelper(#pred""" % DEFS
-
-  impl += Iter(n, """, \\
-                                             #v%s""")
-
-  impl += """, \\
-                                             pred"""
-
-  impl += Iter(n, """, \\
-                                             v%s""")
-
-  impl += """), on_failure)
-
-// %(Arity)s predicate assertion macros.
-#define EXPECT_PRED_FORMAT%(n)s(pred_format, %(vs)s) \\
-  GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, GTEST_NONFATAL_FAILURE_)
-#define EXPECT_PRED%(n)s(pred, %(vs)s) \\
-  GTEST_PRED%(n)s_(pred, %(vs)s, GTEST_NONFATAL_FAILURE_)
-#define ASSERT_PRED_FORMAT%(n)s(pred_format, %(vs)s) \\
-  GTEST_PRED_FORMAT%(n)s_(pred_format, %(vs)s, GTEST_FATAL_FAILURE_)
-#define ASSERT_PRED%(n)s(pred, %(vs)s) \\
-  GTEST_PRED%(n)s_(pred, %(vs)s, GTEST_FATAL_FAILURE_)
-
-""" % DEFS
-
-  return impl
-
-
-def HeaderPostamble():
-  """Returns the postamble for the header file."""
-
-  return """
-
-}  // namespace testing
-
-#endif  // GTEST_INCLUDE_GTEST_GTEST_PRED_IMPL_H_
-"""
-
-
-def GenerateFile(path, content):
-  """Given a file path and a content string
-     overwrites it with the given content.
-  """
-  print 'Updating file %s . . .' % path
-  f = file(path, 'w+')
-  print >>f, content,
-  f.close()
-
-  print 'File %s has been updated.' % path
-
-
-def GenerateHeader(n):
-  """Given the maximum arity n, updates the header file that implements
-  the predicate assertions.
-  """
-  GenerateFile(HEADER,
-               HeaderPreamble(n)
-               + ''.join([ImplementationForArity(i) for i in OneTo(n)])
-               + HeaderPostamble())
-
-
-def UnitTestPreamble():
-  """Returns the preamble for the unit test file."""
-
-  # A map that defines the values used in the preamble template.
-  DEFS = {
-    'today' : time.strftime('%m/%d/%Y'),
-    'year' : time.strftime('%Y'),
-    'command' : '%s %s' % (os.path.basename(sys.argv[0]), sys.argv[1]),
-    }
-
-  return (
-"""// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on %(today)s by command
-// '%(command)s'.  DO NOT EDIT BY HAND!
-
-// Regression test for gtest_pred_impl.h
-//
-// This file is generated by a script and quite long.  If you intend to
-// learn how Google Test works by reading its unit tests, read
-// gtest_unittest.cc instead.
-//
-// This is intended as a regression test for the Google Test predicate
-// assertions.  We compile it as part of the gtest_unittest target
-// only to keep the implementation tidy and compact, as it is quite
-// involved to set up the stage for testing Google Test using Google
-// Test itself.
-//
-// Currently, gtest_unittest takes ~11 seconds to run in the testing
-// daemon.  In the future, if it grows too large and needs much more
-// time to finish, we should consider separating this file into a
-// stand-alone regression test.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-// A user-defined data type.
-struct Bool {
-  explicit Bool(int val) : value(val != 0) {}
-
-  bool operator>(int n) const { return value > Bool(n).value; }
-
-  Bool operator+(const Bool& rhs) const { return Bool(value + rhs.value); }
-
-  bool operator==(const Bool& rhs) const { return value == rhs.value; }
-
-  bool value;
-};
-
-// Enables Bool to be used in assertions.
-std::ostream& operator<<(std::ostream& os, const Bool& x) {
-  return os << (x.value ? "true" : "false");
-}
-
-""" % DEFS)
-
-
-def TestsForArity(n):
-  """Returns the tests for n-ary predicate assertions."""
-
-  # A map that defines the values used in the template for the tests.
-  DEFS = {
-    'n' : n,
-    'es' : Iter(n, 'e%s', sep=', '),
-    'vs' : Iter(n, 'v%s', sep=', '),
-    'vts' : Iter(n, '#v%s', sep=', '),
-    'tvs' : Iter(n, 'T%s v%s', sep=', '),
-    'int_vs' : Iter(n, 'int v%s', sep=', '),
-    'Bool_vs' : Iter(n, 'Bool v%s', sep=', '),
-    'types' : Iter(n, 'typename T%s', sep=', '),
-    'v_sum' : Iter(n, 'v%s', sep=' + '),
-    'arity' : Arity(n),
-    'Arity' : Title(Arity(n)),
-    }
-
-  tests = (
-"""// Sample functions/functors for testing %(arity)s predicate assertions.
-
-// A %(arity)s predicate function.
-template <%(types)s>
-bool PredFunction%(n)s(%(tvs)s) {
-  return %(v_sum)s > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction%(n)sInt(%(int_vs)s) {
-  return %(v_sum)s > 0;
-}
-bool PredFunction%(n)sBool(%(Bool_vs)s) {
-  return %(v_sum)s > 0;
-}
-""" % DEFS)
-
-  tests += """
-// A %(arity)s predicate functor.
-struct PredFunctor%(n)s {
-  template <%(types)s>
-  bool operator()(""" % DEFS
-
-  tests += Iter(n, 'const T%s& v%s', sep=""",
-                  """)
-
-  tests += """) {
-    return %(v_sum)s > 0;
-  }
-};
-""" % DEFS
-
-  tests += """
-// A %(arity)s predicate-formatter function.
-template <%(types)s>
-testing::AssertionResult PredFormatFunction%(n)s(""" % DEFS
-
-  tests += Iter(n, 'const char* e%s', sep=""",
-                                             """)
-
-  tests += Iter(n, """,
-                                             const T%s& v%s""")
-
-  tests += """) {
-  if (PredFunction%(n)s(%(vs)s))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << """ % DEFS
-
-  tests += Iter(n, 'e%s', sep=' << " + " << ')
-
-  tests += """
-      << " is expected to be positive, but evaluates to "
-      << %(v_sum)s << ".";
-}
-""" % DEFS
-
-  tests += """
-// A %(arity)s predicate-formatter functor.
-struct PredFormatFunctor%(n)s {
-  template <%(types)s>
-  testing::AssertionResult operator()(""" % DEFS
-
-  tests += Iter(n, 'const char* e%s', sep=""",
-                                      """)
-
-  tests += Iter(n, """,
-                                      const T%s& v%s""")
-
-  tests += """) const {
-    return PredFormatFunction%(n)s(%(es)s, %(vs)s);
-  }
-};
-""" % DEFS
-
-  tests += """
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT%(n)s.
-
-class Predicate%(n)sTest : public testing::Test {
- protected:
-  virtual void SetUp() {
-    expected_to_finish_ = true;
-    finished_ = false;""" % DEFS
-
-  tests += """
-    """ + Iter(n, 'n%s_ = ') + """0;
-  }
-"""
-
-  tests += """
-  virtual void TearDown() {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once."""
-
-  tests += ''.join(["""
-    EXPECT_EQ(1, n%s_) <<
-        "The predicate assertion didn't evaluate argument %s "
-        "exactly once.";""" % (i, i + 1) for i in OneTo(n)])
-
-  tests += """
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true iff the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true iff the test function did run to finish.
-  static bool finished_;
-""" % DEFS
-
-  tests += Iter(n, """
-  static int n%s_;""")
-
-  tests += """
-};
-
-bool Predicate%(n)sTest::expected_to_finish_;
-bool Predicate%(n)sTest::finished_;
-""" % DEFS
-
-  tests += Iter(n, """int Predicate%%(n)sTest::n%s_;
-""") % DEFS
-
-  tests += """
-typedef Predicate%(n)sTest EXPECT_PRED_FORMAT%(n)sTest;
-typedef Predicate%(n)sTest ASSERT_PRED_FORMAT%(n)sTest;
-typedef Predicate%(n)sTest EXPECT_PRED%(n)sTest;
-typedef Predicate%(n)sTest ASSERT_PRED%(n)sTest;
-""" % DEFS
-
-  def GenTest(use_format, use_assert, expect_failure,
-              use_functor, use_user_type):
-    """Returns the test for a predicate assertion macro.
-
-    Args:
-      use_format:     true iff the assertion is a *_PRED_FORMAT*.
-      use_assert:     true iff the assertion is a ASSERT_*.
-      expect_failure: true iff the assertion is expected to fail.
-      use_functor:    true iff the first argument of the assertion is
-                      a functor (as opposed to a function)
-      use_user_type:  true iff the predicate functor/function takes
-                      argument(s) of a user-defined type.
-
-    Example:
-
-      GenTest(1, 0, 0, 1, 0) returns a test that tests the behavior
-      of a successful EXPECT_PRED_FORMATn() that takes a functor
-      whose arguments have built-in types."""
-
-    if use_assert:
-      assrt = 'ASSERT'  # 'assert' is reserved, so we cannot use
-                        # that identifier here.
-    else:
-      assrt = 'EXPECT'
-
-    assertion = assrt + '_PRED'
-
-    if use_format:
-      pred_format = 'PredFormat'
-      assertion += '_FORMAT'
-    else:
-      pred_format = 'Pred'
-
-    assertion += '%(n)s' % DEFS
-
-    if use_functor:
-      pred_format_type = 'functor'
-      pred_format += 'Functor%(n)s()'
-    else:
-      pred_format_type = 'function'
-      pred_format += 'Function%(n)s'
-      if not use_format:
-        if use_user_type:
-          pred_format += 'Bool'
-        else:
-          pred_format += 'Int'
-
-    test_name = pred_format_type.title()
-
-    if use_user_type:
-      arg_type = 'user-defined type (Bool)'
-      test_name += 'OnUserType'
-      if expect_failure:
-        arg = 'Bool(n%s_++)'
-      else:
-        arg = 'Bool(++n%s_)'
-    else:
-      arg_type = 'built-in type (int)'
-      test_name += 'OnBuiltInType'
-      if expect_failure:
-        arg = 'n%s_++'
-      else:
-        arg = '++n%s_'
-
-    if expect_failure:
-      successful_or_failed = 'failed'
-      expected_or_not = 'expected.'
-      test_name +=  'Failure'
-    else:
-      successful_or_failed = 'successful'
-      expected_or_not = 'UNEXPECTED!'
-      test_name +=  'Success'
-
-    # A map that defines the values used in the test template.
-    defs = DEFS.copy()
-    defs.update({
-      'assert' : assrt,
-      'assertion' : assertion,
-      'test_name' : test_name,
-      'pf_type' : pred_format_type,
-      'pf' : pred_format,
-      'arg_type' : arg_type,
-      'arg' : arg,
-      'successful' : successful_or_failed,
-      'expected' : expected_or_not,
-      })
-
-    test = """
-// Tests a %(successful)s %(assertion)s where the
-// predicate-formatter is a %(pf_type)s on a %(arg_type)s.
-TEST_F(%(assertion)sTest, %(test_name)s) {""" % defs
-
-    indent = (len(assertion) + 3)*' '
-    extra_indent = ''
-
-    if expect_failure:
-      extra_indent = '  '
-      if use_assert:
-        test += """
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT"""
-      else:
-        test += """
-  EXPECT_NONFATAL_FAILURE({  // NOLINT"""
-
-    test += '\n' + extra_indent + """  %(assertion)s(%(pf)s""" % defs
-
-    test = test % defs
-    test += Iter(n, ',\n' + indent + extra_indent + '%(arg)s' % defs)
-    test += ');\n' + extra_indent + '  finished_ = true;\n'
-
-    if expect_failure:
-      test += '  }, "");\n'
-
-    test += '}\n'
-    return test
-
-  # Generates tests for all 2**6 = 64 combinations.
-  tests += ''.join([GenTest(use_format, use_assert, expect_failure,
-                            use_functor, use_user_type)
-                    for use_format in [0, 1]
-                    for use_assert in [0, 1]
-                    for expect_failure in [0, 1]
-                    for use_functor in [0, 1]
-                    for use_user_type in [0, 1]
-                    ])
-
-  return tests
-
-
-def UnitTestPostamble():
-  """Returns the postamble for the tests."""
-
-  return ''
-
-
-def GenerateUnitTest(n):
-  """Returns the tests for up-to n-ary predicate assertions."""
-
-  GenerateFile(UNIT_TEST,
-               UnitTestPreamble()
-               + ''.join([TestsForArity(i) for i in OneTo(n)])
-               + UnitTestPostamble())
-
-
-def _Main():
-  """The entry point of the script.  Generates the header file and its
-  unit test."""
-
-  if len(sys.argv) != 2:
-    print __doc__
-    print 'Author: ' + __author__
-    sys.exit(1)
-
-  n = int(sys.argv[1])
-  GenerateHeader(n)
-  GenerateUnitTest(n)
-
-
-if __name__ == '__main__':
-  _Main()
diff --git a/3rdparty/gtest/scripts/gtest-config.in b/3rdparty/gtest/scripts/gtest-config.in
deleted file mode 100644
index 780f8432..00000000
--- a/3rdparty/gtest/scripts/gtest-config.in
+++ /dev/null
@@ -1,274 +0,0 @@
-#!/bin/sh
-
-# These variables are automatically filled in by the configure script.
-name="@PACKAGE_TARNAME@"
-version="@PACKAGE_VERSION@"
-
-show_usage()
-{
-  echo "Usage: gtest-config [OPTIONS...]"
-}
-
-show_help()
-{
-  show_usage
-  cat <<\EOF
-
-The `gtest-config' script provides access to the necessary compile and linking
-flags to connect with Google C++ Testing Framework, both in a build prior to
-installation, and on the system proper after installation. The installation
-overrides may be issued in combination with any other queries, but will only
-affect installation queries if called on a built but not installed gtest. The
-installation queries may not be issued with any other types of queries, and
-only one installation query may be made at a time. The version queries and
-compiler flag queries may be combined as desired but not mixed. Different
-version queries are always combined with logical "and" semantics, and only the
-last of any particular query is used while all previous ones ignored. All
-versions must be specified as a sequence of numbers separated by periods.
-Compiler flag queries output the union of the sets of flags when combined.
-
- Examples:
-  gtest-config --min-version=1.0 || echo "Insufficient Google Test version."
-
-  g++ $(gtest-config --cppflags --cxxflags) -o foo.o -c foo.cpp
-  g++ $(gtest-config --ldflags --libs) -o foo foo.o
-
-  # When using a built but not installed Google Test:
-  g++ $(../../my_gtest_build/scripts/gtest-config ...) ...
-
-  # When using an installed Google Test, but with installation overrides:
-  export GTEST_PREFIX="/opt"
-  g++ $(gtest-config --libdir="/opt/lib64" ...) ...
-
- Help:
-  --usage                    brief usage information
-  --help                     display this help message
-
- Installation Overrides:
-  --prefix=<dir>             overrides the installation prefix
-  --exec-prefix=<dir>        overrides the executable installation prefix
-  --libdir=<dir>             overrides the library installation prefix
-  --includedir=<dir>         overrides the header file installation prefix
-
- Installation Queries:
-  --prefix                   installation prefix
-  --exec-prefix              executable installation prefix
-  --libdir                   library installation directory
-  --includedir               header file installation directory
-  --version                  the version of the Google Test installation
-
- Version Queries:
-  --min-version=VERSION      return 0 if the version is at least VERSION
-  --exact-version=VERSION    return 0 if the version is exactly VERSION
-  --max-version=VERSION      return 0 if the version is at most VERSION
-
- Compilation Flag Queries:
-  --cppflags                 compile flags specific to the C-like preprocessors
-  --cxxflags                 compile flags appropriate for C++ programs
-  --ldflags                  linker flags
-  --libs                     libraries for linking
-
-EOF
-}
-
-# This function bounds our version with a min and a max. It uses some clever
-# POSIX-compliant variable expansion to portably do all the work in the shell
-# and avoid any dependency on a particular "sed" or "awk" implementation.
-# Notable is that it will only ever compare the first 3 components of versions.
-# Further components will be cleanly stripped off. All versions must be
-# unadorned, so "v1.0" will *not* work. The minimum version must be in $1, and
-# the max in $2. TODO(chandlerc@google.com): If this ever breaks, we should
-# investigate expanding this via autom4te from AS_VERSION_COMPARE rather than
-# continuing to maintain our own shell version.
-check_versions()
-{
-  major_version=${version%%.*}
-  minor_version="0"
-  point_version="0"
-  if test "${version#*.}" != "${version}"; then
-    minor_version=${version#*.}
-    minor_version=${minor_version%%.*}
-  fi
-  if test "${version#*.*.}" != "${version}"; then
-    point_version=${version#*.*.}
-    point_version=${point_version%%.*}
-  fi
-
-  min_version="$1"
-  min_major_version=${min_version%%.*}
-  min_minor_version="0"
-  min_point_version="0"
-  if test "${min_version#*.}" != "${min_version}"; then
-    min_minor_version=${min_version#*.}
-    min_minor_version=${min_minor_version%%.*}
-  fi
-  if test "${min_version#*.*.}" != "${min_version}"; then
-    min_point_version=${min_version#*.*.}
-    min_point_version=${min_point_version%%.*}
-  fi
-
-  max_version="$2"
-  max_major_version=${max_version%%.*}
-  max_minor_version="0"
-  max_point_version="0"
-  if test "${max_version#*.}" != "${max_version}"; then
-    max_minor_version=${max_version#*.}
-    max_minor_version=${max_minor_version%%.*}
-  fi
-  if test "${max_version#*.*.}" != "${max_version}"; then
-    max_point_version=${max_version#*.*.}
-    max_point_version=${max_point_version%%.*}
-  fi
-
-  test $(($major_version)) -lt $(($min_major_version)) && exit 1
-  if test $(($major_version)) -eq $(($min_major_version)); then
-    test $(($minor_version)) -lt $(($min_minor_version)) && exit 1
-    if test $(($minor_version)) -eq $(($min_minor_version)); then
-      test $(($point_version)) -lt $(($min_point_version)) && exit 1
-    fi
-  fi
-
-  test $(($major_version)) -gt $(($max_major_version)) && exit 1
-  if test $(($major_version)) -eq $(($max_major_version)); then
-    test $(($minor_version)) -gt $(($max_minor_version)) && exit 1
-    if test $(($minor_version)) -eq $(($max_minor_version)); then
-      test $(($point_version)) -gt $(($max_point_version)) && exit 1
-    fi
-  fi
-
-  exit 0
-}
-
-# Show the usage line when no arguments are specified.
-if test $# -eq 0; then
-  show_usage
-  exit 1
-fi
-
-while test $# -gt 0; do
-  case $1 in
-    --usage)          show_usage;         exit 0;;
-    --help)           show_help;          exit 0;;
-
-    # Installation overrides
-    --prefix=*)       GTEST_PREFIX=${1#--prefix=};;
-    --exec-prefix=*)  GTEST_EXEC_PREFIX=${1#--exec-prefix=};;
-    --libdir=*)       GTEST_LIBDIR=${1#--libdir=};;
-    --includedir=*)   GTEST_INCLUDEDIR=${1#--includedir=};;
-
-    # Installation queries
-    --prefix|--exec-prefix|--libdir|--includedir|--version)
-      if test -n "${do_query}"; then
-        show_usage
-        exit 1
-      fi
-      do_query=${1#--}
-      ;;
-
-    # Version checking
-    --min-version=*)
-      do_check_versions=yes
-      min_version=${1#--min-version=}
-      ;;
-    --max-version=*)
-      do_check_versions=yes
-      max_version=${1#--max-version=}
-      ;;
-    --exact-version=*)
-      do_check_versions=yes
-      exact_version=${1#--exact-version=}
-      ;;
-
-    # Compiler flag output
-    --cppflags)       echo_cppflags=yes;;
-    --cxxflags)       echo_cxxflags=yes;;
-    --ldflags)        echo_ldflags=yes;;
-    --libs)           echo_libs=yes;;
-
-    # Everything else is an error
-    *)                show_usage;         exit 1;;
-  esac
-  shift
-done
-
-# These have defaults filled in by the configure script but can also be
-# overridden by environment variables or command line parameters.
-prefix="${GTEST_PREFIX:-@prefix@}"
-exec_prefix="${GTEST_EXEC_PREFIX:-@exec_prefix@}"
-libdir="${GTEST_LIBDIR:-@libdir@}"
-includedir="${GTEST_INCLUDEDIR:-@includedir@}"
-
-# We try and detect if our binary is not located at its installed location. If
-# it's not, we provide variables pointing to the source and build tree rather
-# than to the install tree. This allows building against a just-built gtest
-# rather than an installed gtest.
-bindir="@bindir@"
-this_relative_bindir=`dirname $0`
-this_bindir=`cd ${this_relative_bindir}; pwd -P`
-if test "${this_bindir}" = "${this_bindir%${bindir}}"; then
-  # The path to the script doesn't end in the bindir sequence from Autoconf,
-  # assume that we are in a build tree.
-  build_dir=`dirname ${this_bindir}`
-  src_dir=`cd ${this_bindir}; cd @top_srcdir@; pwd -P`
-
-  # TODO(chandlerc@google.com): This is a dangerous dependency on libtool, we
-  # should work to remove it, and/or remove libtool altogether, replacing it
-  # with direct references to the library and a link path.
-  gtest_libs="${build_dir}/lib/libgtest.la @PTHREAD_CFLAGS@ @PTHREAD_LIBS@"
-  gtest_ldflags=""
-
-  # We provide hooks to include from either the source or build dir, where the
-  # build dir is always preferred. This will potentially allow us to write
-  # build rules for generated headers and have them automatically be preferred
-  # over provided versions.
-  gtest_cppflags="-I${build_dir}/include -I${src_dir}/include"
-  gtest_cxxflags="@PTHREAD_CFLAGS@"
-else
-  # We're using an installed gtest, although it may be staged under some
-  # prefix. Assume (as our own libraries do) that we can resolve the prefix,
-  # and are present in the dynamic link paths.
-  gtest_ldflags="-L${libdir}"
-  gtest_libs="-l${name} @PTHREAD_CFLAGS@ @PTHREAD_LIBS@"
-  gtest_cppflags="-I${includedir}"
-  gtest_cxxflags="@PTHREAD_CFLAGS@"
-fi
-
-# Do an installation query if requested.
-if test -n "$do_query"; then
-  case $do_query in
-    prefix)           echo $prefix;       exit 0;;
-    exec-prefix)      echo $exec_prefix;  exit 0;;
-    libdir)           echo $libdir;       exit 0;;
-    includedir)       echo $includedir;   exit 0;;
-    version)          echo $version;      exit 0;;
-    *)                show_usage;         exit 1;;
-  esac
-fi
-
-# Do a version check if requested.
-if test "$do_check_versions" = "yes"; then
-  # Make sure we didn't receive a bad combination of parameters.
-  test "$echo_cppflags" = "yes" && show_usage && exit 1
-  test "$echo_cxxflags" = "yes" && show_usage && exit 1
-  test "$echo_ldflags" = "yes"  && show_usage && exit 1
-  test "$echo_libs" = "yes"     && show_usage && exit 1
-
-  if test "$exact_version" != ""; then
-    check_versions $exact_version $exact_version
-    # unreachable
-  else
-    check_versions ${min_version:-0.0.0} ${max_version:-9999.9999.9999}
-    # unreachable
-  fi
-fi
-
-# Do the output in the correct order so that these can be used in-line of
-# a compiler invocation.
-output=""
-test "$echo_cppflags" = "yes" && output="$output $gtest_cppflags"
-test "$echo_cxxflags" = "yes" && output="$output $gtest_cxxflags"
-test "$echo_ldflags" = "yes"  && output="$output $gtest_ldflags"
-test "$echo_libs" = "yes"     && output="$output $gtest_libs"
-echo $output
-
-exit 0
diff --git a/3rdparty/gtest/scripts/pump.py b/3rdparty/gtest/scripts/pump.py
deleted file mode 100644
index 5efb653c..00000000
--- a/3rdparty/gtest/scripts/pump.py
+++ /dev/null
@@ -1,855 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""pump v0.2.0 - Pretty Useful for Meta Programming.
-
-A tool for preprocessor meta programming.  Useful for generating
-repetitive boilerplate code.  Especially useful for writing C++
-classes, functions, macros, and templates that need to work with
-various number of arguments.
-
-USAGE:
-       pump.py SOURCE_FILE
-
-EXAMPLES:
-       pump.py foo.cc.pump
-         Converts foo.cc.pump to foo.cc.
-
-GRAMMAR:
-       CODE ::= ATOMIC_CODE*
-       ATOMIC_CODE ::= $var ID = EXPRESSION
-           | $var ID = [[ CODE ]]
-           | $range ID EXPRESSION..EXPRESSION
-           | $for ID SEPARATOR [[ CODE ]]
-           | $($)
-           | $ID
-           | $(EXPRESSION)
-           | $if EXPRESSION [[ CODE ]] ELSE_BRANCH
-           | [[ CODE ]]
-           | RAW_CODE
-       SEPARATOR ::= RAW_CODE | EMPTY
-       ELSE_BRANCH ::= $else [[ CODE ]]
-           | $elif EXPRESSION [[ CODE ]] ELSE_BRANCH
-           | EMPTY
-       EXPRESSION has Python syntax.
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import re
-import sys
-
-
-TOKEN_TABLE = [
-    (re.compile(r'\$var\s+'), '$var'),
-    (re.compile(r'\$elif\s+'), '$elif'),
-    (re.compile(r'\$else\s+'), '$else'),
-    (re.compile(r'\$for\s+'), '$for'),
-    (re.compile(r'\$if\s+'), '$if'),
-    (re.compile(r'\$range\s+'), '$range'),
-    (re.compile(r'\$[_A-Za-z]\w*'), '$id'),
-    (re.compile(r'\$\(\$\)'), '$($)'),
-    (re.compile(r'\$'), '$'),
-    (re.compile(r'\[\[\n?'), '[['),
-    (re.compile(r'\]\]\n?'), ']]'),
-    ]
-
-
-class Cursor:
-  """Represents a position (line and column) in a text file."""
-
-  def __init__(self, line=-1, column=-1):
-    self.line = line
-    self.column = column
-
-  def __eq__(self, rhs):
-    return self.line == rhs.line and self.column == rhs.column
-
-  def __ne__(self, rhs):
-    return not self == rhs
-
-  def __lt__(self, rhs):
-    return self.line < rhs.line or (
-        self.line == rhs.line and self.column < rhs.column)
-
-  def __le__(self, rhs):
-    return self < rhs or self == rhs
-
-  def __gt__(self, rhs):
-    return rhs < self
-
-  def __ge__(self, rhs):
-    return rhs <= self
-
-  def __str__(self):
-    if self == Eof():
-      return 'EOF'
-    else:
-      return '%s(%s)' % (self.line + 1, self.column)
-
-  def __add__(self, offset):
-    return Cursor(self.line, self.column + offset)
-
-  def __sub__(self, offset):
-    return Cursor(self.line, self.column - offset)
-
-  def Clone(self):
-    """Returns a copy of self."""
-
-    return Cursor(self.line, self.column)
-
-
-# Special cursor to indicate the end-of-file.
-def Eof():
-  """Returns the special cursor to denote the end-of-file."""
-  return Cursor(-1, -1)
-
-
-class Token:
-  """Represents a token in a Pump source file."""
-
-  def __init__(self, start=None, end=None, value=None, token_type=None):
-    if start is None:
-      self.start = Eof()
-    else:
-      self.start = start
-    if end is None:
-      self.end = Eof()
-    else:
-      self.end = end
-    self.value = value
-    self.token_type = token_type
-
-  def __str__(self):
-    return 'Token @%s: \'%s\' type=%s' % (
-        self.start, self.value, self.token_type)
-
-  def Clone(self):
-    """Returns a copy of self."""
-
-    return Token(self.start.Clone(), self.end.Clone(), self.value,
-                 self.token_type)
-
-
-def StartsWith(lines, pos, string):
-  """Returns True iff the given position in lines starts with 'string'."""
-
-  return lines[pos.line][pos.column:].startswith(string)
-
-
-def FindFirstInLine(line, token_table):
-  best_match_start = -1
-  for (regex, token_type) in token_table:
-    m = regex.search(line)
-    if m:
-      # We found regex in lines
-      if best_match_start < 0 or m.start() < best_match_start:
-        best_match_start = m.start()
-        best_match_length = m.end() - m.start()
-        best_match_token_type = token_type
-
-  if best_match_start < 0:
-    return None
-
-  return (best_match_start, best_match_length, best_match_token_type)
-
-
-def FindFirst(lines, token_table, cursor):
-  """Finds the first occurrence of any string in strings in lines."""
-
-  start = cursor.Clone()
-  cur_line_number = cursor.line
-  for line in lines[start.line:]:
-    if cur_line_number == start.line:
-      line = line[start.column:]
-    m = FindFirstInLine(line, token_table)
-    if m:
-      # We found a regex in line.
-      (start_column, length, token_type) = m
-      if cur_line_number == start.line:
-        start_column += start.column
-      found_start = Cursor(cur_line_number, start_column)
-      found_end = found_start + length
-      return MakeToken(lines, found_start, found_end, token_type)
-    cur_line_number += 1
-  # We failed to find str in lines
-  return None
-
-
-def SubString(lines, start, end):
-  """Returns a substring in lines."""
-
-  if end == Eof():
-    end = Cursor(len(lines) - 1, len(lines[-1]))
-
-  if start >= end:
-    return ''
-
-  if start.line == end.line:
-    return lines[start.line][start.column:end.column]
-
-  result_lines = ([lines[start.line][start.column:]] +
-                  lines[start.line + 1:end.line] +
-                  [lines[end.line][:end.column]])
-  return ''.join(result_lines)
-
-
-def StripMetaComments(str):
-  """Strip meta comments from each line in the given string."""
-
-  # First, completely remove lines containing nothing but a meta
-  # comment, including the trailing \n.
-  str = re.sub(r'^\s*\$\$.*\n', '', str)
-
-  # Then, remove meta comments from contentful lines.
-  return re.sub(r'\s*\$\$.*', '', str)
-
-
-def MakeToken(lines, start, end, token_type):
-  """Creates a new instance of Token."""
-
-  return Token(start, end, SubString(lines, start, end), token_type)
-
-
-def ParseToken(lines, pos, regex, token_type):
-  line = lines[pos.line][pos.column:]
-  m = regex.search(line)
-  if m and not m.start():
-    return MakeToken(lines, pos, pos + m.end(), token_type)
-  else:
-    print 'ERROR: %s expected at %s.' % (token_type, pos)
-    sys.exit(1)
-
-
-ID_REGEX = re.compile(r'[_A-Za-z]\w*')
-EQ_REGEX = re.compile(r'=')
-REST_OF_LINE_REGEX = re.compile(r'.*?(?=$|\$\$)')
-OPTIONAL_WHITE_SPACES_REGEX = re.compile(r'\s*')
-WHITE_SPACE_REGEX = re.compile(r'\s')
-DOT_DOT_REGEX = re.compile(r'\.\.')
-
-
-def Skip(lines, pos, regex):
-  line = lines[pos.line][pos.column:]
-  m = re.search(regex, line)
-  if m and not m.start():
-    return pos + m.end()
-  else:
-    return pos
-
-
-def SkipUntil(lines, pos, regex, token_type):
-  line = lines[pos.line][pos.column:]
-  m = re.search(regex, line)
-  if m:
-    return pos + m.start()
-  else:
-    print ('ERROR: %s expected on line %s after column %s.' %
-           (token_type, pos.line + 1, pos.column))
-    sys.exit(1)
-
-
-def ParseExpTokenInParens(lines, pos):
-  def ParseInParens(pos):
-    pos = Skip(lines, pos, OPTIONAL_WHITE_SPACES_REGEX)
-    pos = Skip(lines, pos, r'\(')
-    pos = Parse(pos)
-    pos = Skip(lines, pos, r'\)')
-    return pos
-
-  def Parse(pos):
-    pos = SkipUntil(lines, pos, r'\(|\)', ')')
-    if SubString(lines, pos, pos + 1) == '(':
-      pos = Parse(pos + 1)
-      pos = Skip(lines, pos, r'\)')
-      return Parse(pos)
-    else:
-      return pos
-
-  start = pos.Clone()
-  pos = ParseInParens(pos)
-  return MakeToken(lines, start, pos, 'exp')
-
-
-def RStripNewLineFromToken(token):
-  if token.value.endswith('\n'):
-    return Token(token.start, token.end, token.value[:-1], token.token_type)
-  else:
-    return token
-
-
-def TokenizeLines(lines, pos):
-  while True:
-    found = FindFirst(lines, TOKEN_TABLE, pos)
-    if not found:
-      yield MakeToken(lines, pos, Eof(), 'code')
-      return
-
-    if found.start == pos:
-      prev_token = None
-      prev_token_rstripped = None
-    else:
-      prev_token = MakeToken(lines, pos, found.start, 'code')
-      prev_token_rstripped = RStripNewLineFromToken(prev_token)
-
-    if found.token_type == '$var':
-      if prev_token_rstripped:
-        yield prev_token_rstripped
-      yield found
-      id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
-      yield id_token
-      pos = Skip(lines, id_token.end, OPTIONAL_WHITE_SPACES_REGEX)
-
-      eq_token = ParseToken(lines, pos, EQ_REGEX, '=')
-      yield eq_token
-      pos = Skip(lines, eq_token.end, r'\s*')
-
-      if SubString(lines, pos, pos + 2) != '[[':
-        exp_token = ParseToken(lines, pos, REST_OF_LINE_REGEX, 'exp')
-        yield exp_token
-        pos = Cursor(exp_token.end.line + 1, 0)
-    elif found.token_type == '$for':
-      if prev_token_rstripped:
-        yield prev_token_rstripped
-      yield found
-      id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
-      yield id_token
-      pos = Skip(lines, id_token.end, WHITE_SPACE_REGEX)
-    elif found.token_type == '$range':
-      if prev_token_rstripped:
-        yield prev_token_rstripped
-      yield found
-      id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
-      yield id_token
-      pos = Skip(lines, id_token.end, OPTIONAL_WHITE_SPACES_REGEX)
-
-      dots_pos = SkipUntil(lines, pos, DOT_DOT_REGEX, '..')
-      yield MakeToken(lines, pos, dots_pos, 'exp')
-      yield MakeToken(lines, dots_pos, dots_pos + 2, '..')
-      pos = dots_pos + 2
-      new_pos = Cursor(pos.line + 1, 0)
-      yield MakeToken(lines, pos, new_pos, 'exp')
-      pos = new_pos
-    elif found.token_type == '$':
-      if prev_token:
-        yield prev_token
-      yield found
-      exp_token = ParseExpTokenInParens(lines, found.end)
-      yield exp_token
-      pos = exp_token.end
-    elif (found.token_type == ']]' or found.token_type == '$if' or
-          found.token_type == '$elif' or found.token_type == '$else'):
-      if prev_token_rstripped:
-        yield prev_token_rstripped
-      yield found
-      pos = found.end
-    else:
-      if prev_token:
-        yield prev_token
-      yield found
-      pos = found.end
-
-
-def Tokenize(s):
-  """A generator that yields the tokens in the given string."""
-  if s != '':
-    lines = s.splitlines(True)
-    for token in TokenizeLines(lines, Cursor(0, 0)):
-      yield token
-
-
-class CodeNode:
-  def __init__(self, atomic_code_list=None):
-    self.atomic_code = atomic_code_list
-
-
-class VarNode:
-  def __init__(self, identifier=None, atomic_code=None):
-    self.identifier = identifier
-    self.atomic_code = atomic_code
-
-
-class RangeNode:
-  def __init__(self, identifier=None, exp1=None, exp2=None):
-    self.identifier = identifier
-    self.exp1 = exp1
-    self.exp2 = exp2
-
-
-class ForNode:
-  def __init__(self, identifier=None, sep=None, code=None):
-    self.identifier = identifier
-    self.sep = sep
-    self.code = code
-
-
-class ElseNode:
-  def __init__(self, else_branch=None):
-    self.else_branch = else_branch
-
-
-class IfNode:
-  def __init__(self, exp=None, then_branch=None, else_branch=None):
-    self.exp = exp
-    self.then_branch = then_branch
-    self.else_branch = else_branch
-
-
-class RawCodeNode:
-  def __init__(self, token=None):
-    self.raw_code = token
-
-
-class LiteralDollarNode:
-  def __init__(self, token):
-    self.token = token
-
-
-class ExpNode:
-  def __init__(self, token, python_exp):
-    self.token = token
-    self.python_exp = python_exp
-
-
-def PopFront(a_list):
-  head = a_list[0]
-  a_list[:1] = []
-  return head
-
-
-def PushFront(a_list, elem):
-  a_list[:0] = [elem]
-
-
-def PopToken(a_list, token_type=None):
-  token = PopFront(a_list)
-  if token_type is not None and token.token_type != token_type:
-    print 'ERROR: %s expected at %s' % (token_type, token.start)
-    print 'ERROR: %s found instead' % (token,)
-    sys.exit(1)
-
-  return token
-
-
-def PeekToken(a_list):
-  if not a_list:
-    return None
-
-  return a_list[0]
-
-
-def ParseExpNode(token):
-  python_exp = re.sub(r'([_A-Za-z]\w*)', r'self.GetValue("\1")', token.value)
-  return ExpNode(token, python_exp)
-
-
-def ParseElseNode(tokens):
-  def Pop(token_type=None):
-    return PopToken(tokens, token_type)
-
-  next = PeekToken(tokens)
-  if not next:
-    return None
-  if next.token_type == '$else':
-    Pop('$else')
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    return code_node
-  elif next.token_type == '$elif':
-    Pop('$elif')
-    exp = Pop('code')
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    inner_else_node = ParseElseNode(tokens)
-    return CodeNode([IfNode(ParseExpNode(exp), code_node, inner_else_node)])
-  elif not next.value.strip():
-    Pop('code')
-    return ParseElseNode(tokens)
-  else:
-    return None
-
-
-def ParseAtomicCodeNode(tokens):
-  def Pop(token_type=None):
-    return PopToken(tokens, token_type)
-
-  head = PopFront(tokens)
-  t = head.token_type
-  if t == 'code':
-    return RawCodeNode(head)
-  elif t == '$var':
-    id_token = Pop('id')
-    Pop('=')
-    next = PeekToken(tokens)
-    if next.token_type == 'exp':
-      exp_token = Pop()
-      return VarNode(id_token, ParseExpNode(exp_token))
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    return VarNode(id_token, code_node)
-  elif t == '$for':
-    id_token = Pop('id')
-    next_token = PeekToken(tokens)
-    if next_token.token_type == 'code':
-      sep_token = next_token
-      Pop('code')
-    else:
-      sep_token = None
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    return ForNode(id_token, sep_token, code_node)
-  elif t == '$if':
-    exp_token = Pop('code')
-    Pop('[[')
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    else_node = ParseElseNode(tokens)
-    return IfNode(ParseExpNode(exp_token), code_node, else_node)
-  elif t == '$range':
-    id_token = Pop('id')
-    exp1_token = Pop('exp')
-    Pop('..')
-    exp2_token = Pop('exp')
-    return RangeNode(id_token, ParseExpNode(exp1_token),
-                     ParseExpNode(exp2_token))
-  elif t == '$id':
-    return ParseExpNode(Token(head.start + 1, head.end, head.value[1:], 'id'))
-  elif t == '$($)':
-    return LiteralDollarNode(head)
-  elif t == '$':
-    exp_token = Pop('exp')
-    return ParseExpNode(exp_token)
-  elif t == '[[':
-    code_node = ParseCodeNode(tokens)
-    Pop(']]')
-    return code_node
-  else:
-    PushFront(tokens, head)
-    return None
-
-
-def ParseCodeNode(tokens):
-  atomic_code_list = []
-  while True:
-    if not tokens:
-      break
-    atomic_code_node = ParseAtomicCodeNode(tokens)
-    if atomic_code_node:
-      atomic_code_list.append(atomic_code_node)
-    else:
-      break
-  return CodeNode(atomic_code_list)
-
-
-def ParseToAST(pump_src_text):
-  """Convert the given Pump source text into an AST."""
-  tokens = list(Tokenize(pump_src_text))
-  code_node = ParseCodeNode(tokens)
-  return code_node
-
-
-class Env:
-  def __init__(self):
-    self.variables = []
-    self.ranges = []
-
-  def Clone(self):
-    clone = Env()
-    clone.variables = self.variables[:]
-    clone.ranges = self.ranges[:]
-    return clone
-
-  def PushVariable(self, var, value):
-    # If value looks like an int, store it as an int.
-    try:
-      int_value = int(value)
-      if ('%s' % int_value) == value:
-        value = int_value
-    except Exception:
-      pass
-    self.variables[:0] = [(var, value)]
-
-  def PopVariable(self):
-    self.variables[:1] = []
-
-  def PushRange(self, var, lower, upper):
-    self.ranges[:0] = [(var, lower, upper)]
-
-  def PopRange(self):
-    self.ranges[:1] = []
-
-  def GetValue(self, identifier):
-    for (var, value) in self.variables:
-      if identifier == var:
-        return value
-
-    print 'ERROR: meta variable %s is undefined.' % (identifier,)
-    sys.exit(1)
-
-  def EvalExp(self, exp):
-    try:
-      result = eval(exp.python_exp)
-    except Exception, e:
-      print 'ERROR: caught exception %s: %s' % (e.__class__.__name__, e)
-      print ('ERROR: failed to evaluate meta expression %s at %s' %
-             (exp.python_exp, exp.token.start))
-      sys.exit(1)
-    return result
-
-  def GetRange(self, identifier):
-    for (var, lower, upper) in self.ranges:
-      if identifier == var:
-        return (lower, upper)
-
-    print 'ERROR: range %s is undefined.' % (identifier,)
-    sys.exit(1)
-
-
-class Output:
-  def __init__(self):
-    self.string = ''
-
-  def GetLastLine(self):
-    index = self.string.rfind('\n')
-    if index < 0:
-      return ''
-
-    return self.string[index + 1:]
-
-  def Append(self, s):
-    self.string += s
-
-
-def RunAtomicCode(env, node, output):
-  if isinstance(node, VarNode):
-    identifier = node.identifier.value.strip()
-    result = Output()
-    RunAtomicCode(env.Clone(), node.atomic_code, result)
-    value = result.string
-    env.PushVariable(identifier, value)
-  elif isinstance(node, RangeNode):
-    identifier = node.identifier.value.strip()
-    lower = int(env.EvalExp(node.exp1))
-    upper = int(env.EvalExp(node.exp2))
-    env.PushRange(identifier, lower, upper)
-  elif isinstance(node, ForNode):
-    identifier = node.identifier.value.strip()
-    if node.sep is None:
-      sep = ''
-    else:
-      sep = node.sep.value
-    (lower, upper) = env.GetRange(identifier)
-    for i in range(lower, upper + 1):
-      new_env = env.Clone()
-      new_env.PushVariable(identifier, i)
-      RunCode(new_env, node.code, output)
-      if i != upper:
-        output.Append(sep)
-  elif isinstance(node, RawCodeNode):
-    output.Append(node.raw_code.value)
-  elif isinstance(node, IfNode):
-    cond = env.EvalExp(node.exp)
-    if cond:
-      RunCode(env.Clone(), node.then_branch, output)
-    elif node.else_branch is not None:
-      RunCode(env.Clone(), node.else_branch, output)
-  elif isinstance(node, ExpNode):
-    value = env.EvalExp(node)
-    output.Append('%s' % (value,))
-  elif isinstance(node, LiteralDollarNode):
-    output.Append('$')
-  elif isinstance(node, CodeNode):
-    RunCode(env.Clone(), node, output)
-  else:
-    print 'BAD'
-    print node
-    sys.exit(1)
-
-
-def RunCode(env, code_node, output):
-  for atomic_code in code_node.atomic_code:
-    RunAtomicCode(env, atomic_code, output)
-
-
-def IsSingleLineComment(cur_line):
-  return '//' in cur_line
-
-
-def IsInPreprocessorDirective(prev_lines, cur_line):
-  if cur_line.lstrip().startswith('#'):
-    return True
-  return prev_lines and prev_lines[-1].endswith('\\')
-
-
-def WrapComment(line, output):
-  loc = line.find('//')
-  before_comment = line[:loc].rstrip()
-  if before_comment == '':
-    indent = loc
-  else:
-    output.append(before_comment)
-    indent = len(before_comment) - len(before_comment.lstrip())
-  prefix = indent*' ' + '// '
-  max_len = 80 - len(prefix)
-  comment = line[loc + 2:].strip()
-  segs = [seg for seg in re.split(r'(\w+\W*)', comment) if seg != '']
-  cur_line = ''
-  for seg in segs:
-    if len((cur_line + seg).rstrip()) < max_len:
-      cur_line += seg
-    else:
-      if cur_line.strip() != '':
-        output.append(prefix + cur_line.rstrip())
-      cur_line = seg.lstrip()
-  if cur_line.strip() != '':
-    output.append(prefix + cur_line.strip())
-
-
-def WrapCode(line, line_concat, output):
-  indent = len(line) - len(line.lstrip())
-  prefix = indent*' '  # Prefix of the current line
-  max_len = 80 - indent - len(line_concat)  # Maximum length of the current line
-  new_prefix = prefix + 4*' '  # Prefix of a continuation line
-  new_max_len = max_len - 4  # Maximum length of a continuation line
-  # Prefers to wrap a line after a ',' or ';'.
-  segs = [seg for seg in re.split(r'([^,;]+[,;]?)', line.strip()) if seg != '']
-  cur_line = ''  # The current line without leading spaces.
-  for seg in segs:
-    # If the line is still too long, wrap at a space.
-    while cur_line == '' and len(seg.strip()) > max_len:
-      seg = seg.lstrip()
-      split_at = seg.rfind(' ', 0, max_len)
-      output.append(prefix + seg[:split_at].strip() + line_concat)
-      seg = seg[split_at + 1:]
-      prefix = new_prefix
-      max_len = new_max_len
-
-    if len((cur_line + seg).rstrip()) < max_len:
-      cur_line = (cur_line + seg).lstrip()
-    else:
-      output.append(prefix + cur_line.rstrip() + line_concat)
-      prefix = new_prefix
-      max_len = new_max_len
-      cur_line = seg.lstrip()
-  if cur_line.strip() != '':
-    output.append(prefix + cur_line.strip())
-
-
-def WrapPreprocessorDirective(line, output):
-  WrapCode(line, ' \\', output)
-
-
-def WrapPlainCode(line, output):
-  WrapCode(line, '', output)
-
-
-def IsMultiLineIWYUPragma(line):
-  return re.search(r'/\* IWYU pragma: ', line)
-
-
-def IsHeaderGuardIncludeOrOneLineIWYUPragma(line):
-  return (re.match(r'^#(ifndef|define|endif\s*//)\s*[\w_]+\s*$', line) or
-          re.match(r'^#include\s', line) or
-          # Don't break IWYU pragmas, either; that causes iwyu.py problems.
-          re.search(r'// IWYU pragma: ', line))
-
-
-def WrapLongLine(line, output):
-  line = line.rstrip()
-  if len(line) <= 80:
-    output.append(line)
-  elif IsSingleLineComment(line):
-    if IsHeaderGuardIncludeOrOneLineIWYUPragma(line):
-      # The style guide made an exception to allow long header guard lines,
-      # includes and IWYU pragmas.
-      output.append(line)
-    else:
-      WrapComment(line, output)
-  elif IsInPreprocessorDirective(output, line):
-    if IsHeaderGuardIncludeOrOneLineIWYUPragma(line):
-      # The style guide made an exception to allow long header guard lines,
-      # includes and IWYU pragmas.
-      output.append(line)
-    else:
-      WrapPreprocessorDirective(line, output)
-  elif IsMultiLineIWYUPragma(line):
-    output.append(line)
-  else:
-    WrapPlainCode(line, output)
-
-
-def BeautifyCode(string):
-  lines = string.splitlines()
-  output = []
-  for line in lines:
-    WrapLongLine(line, output)
-  output2 = [line.rstrip() for line in output]
-  return '\n'.join(output2) + '\n'
-
-
-def ConvertFromPumpSource(src_text):
-  """Return the text generated from the given Pump source text."""
-  ast = ParseToAST(StripMetaComments(src_text))
-  output = Output()
-  RunCode(Env(), ast, output)
-  return BeautifyCode(output.string)
-
-
-def main(argv):
-  if len(argv) == 1:
-    print __doc__
-    sys.exit(1)
-
-  file_path = argv[-1]
-  output_str = ConvertFromPumpSource(file(file_path, 'r').read())
-  if file_path.endswith('.pump'):
-    output_file_path = file_path[:-5]
-  else:
-    output_file_path = '-'
-  if output_file_path == '-':
-    print output_str,
-  else:
-    output_file = file(output_file_path, 'w')
-    output_file.write('// This file was GENERATED by command:\n')
-    output_file.write('//     %s %s\n' %
-                      (os.path.basename(__file__), os.path.basename(file_path)))
-    output_file.write('// DO NOT EDIT BY HAND!!!\n\n')
-    output_file.write(output_str)
-    output_file.close()
-
-
-if __name__ == '__main__':
-  main(sys.argv)
diff --git a/3rdparty/gtest/scripts/release_docs.py b/3rdparty/gtest/scripts/release_docs.py
deleted file mode 100644
index 1291347f..00000000
--- a/3rdparty/gtest/scripts/release_docs.py
+++ /dev/null
@@ -1,158 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2013 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Script for branching Google Test/Mock wiki pages for a new version.
-
-SYNOPSIS
-       release_docs.py NEW_RELEASE_VERSION
-
-       Google Test and Google Mock's external user documentation is in
-       interlinked wiki files.  When we release a new version of
-       Google Test or Google Mock, we need to branch the wiki files
-       such that users of a specific version of Google Test/Mock can
-       look up documenation relevant for that version.  This script
-       automates that process by:
-
-         - branching the current wiki pages (which document the
-           behavior of the SVN trunk head) to pages for the specified
-           version (e.g. branching FAQ.wiki to V2_6_FAQ.wiki when
-           NEW_RELEASE_VERSION is 2.6);
-         - updating the links in the branched files to point to the branched
-           version (e.g. a link in V2_6_FAQ.wiki that pointed to
-           Primer.wiki#Anchor will now point to V2_6_Primer.wiki#Anchor).
-
-       NOTE: NEW_RELEASE_VERSION must be a NEW version number for
-       which the wiki pages don't yet exist; otherwise you'll get SVN
-       errors like "svn: Path 'V1_7_PumpManual.wiki' is not a
-       directory" when running the script.
-
-EXAMPLE
-       $ cd PATH/TO/GTEST_SVN_WORKSPACE/trunk
-       $ scripts/release_docs.py 2.6  # create wiki pages for v2.6
-       $ svn status                   # verify the file list
-       $ svn diff                     # verify the file contents
-       $ svn commit -m "release wiki pages for v2.6"
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import re
-import sys
-
-import common
-
-
-# Wiki pages that shouldn't be branched for every gtest/gmock release.
-GTEST_UNVERSIONED_WIKIS = ['DevGuide.wiki']
-GMOCK_UNVERSIONED_WIKIS = [
-    'DesignDoc.wiki',
-    'DevGuide.wiki',
-    'KnownIssues.wiki'
-    ]
-
-
-def DropWikiSuffix(wiki_filename):
-  """Removes the .wiki suffix (if any) from the given filename."""
-
-  return (wiki_filename[:-len('.wiki')] if wiki_filename.endswith('.wiki')
-          else wiki_filename)
-
-
-class WikiBrancher(object):
-  """Branches ..."""
-
-  def __init__(self, dot_version):
-    self.project, svn_root_path = common.GetSvnInfo()
-    if self.project not in ('googletest', 'googlemock'):
-      sys.exit('This script must be run in a gtest or gmock SVN workspace.')
-    self.wiki_dir = svn_root_path + '/wiki'
-    # Turn '2.6' to 'V2_6_'.
-    self.version_prefix = 'V' + dot_version.replace('.', '_') + '_'
-    self.files_to_branch = self.GetFilesToBranch()
-    page_names = [DropWikiSuffix(f) for f in self.files_to_branch]
-    # A link to Foo.wiki is in one of the following forms:
-    #   [Foo words]
-    #   [Foo#Anchor words]
-    #   [http://code.google.com/.../wiki/Foo words]
-    #   [http://code.google.com/.../wiki/Foo#Anchor words]
-    # We want to replace 'Foo' with 'V2_6_Foo' in the above cases.
-    self.search_for_re = re.compile(
-        # This regex matches either
-        #   [Foo
-        # or
-        #   /wiki/Foo
-        # followed by a space or a #, where Foo is the name of an
-        # unversioned wiki page.
-        r'(\[|/wiki/)(%s)([ #])' % '|'.join(page_names))
-    self.replace_with = r'\1%s\2\3' % (self.version_prefix,)
-
-  def GetFilesToBranch(self):
-    """Returns a list of .wiki file names that need to be branched."""
-
-    unversioned_wikis = (GTEST_UNVERSIONED_WIKIS if self.project == 'googletest'
-                         else GMOCK_UNVERSIONED_WIKIS)
-    return [f for f in os.listdir(self.wiki_dir)
-            if (f.endswith('.wiki') and
-                not re.match(r'^V\d', f) and  # Excluded versioned .wiki files.
-                f not in unversioned_wikis)]
-
-  def BranchFiles(self):
-    """Branches the .wiki files needed to be branched."""
-
-    print 'Branching %d .wiki files:' % (len(self.files_to_branch),)
-    os.chdir(self.wiki_dir)
-    for f in self.files_to_branch:
-      command = 'svn cp %s %s%s' % (f, self.version_prefix, f)
-      print command
-      os.system(command)
-
-  def UpdateLinksInBranchedFiles(self):
-
-    for f in self.files_to_branch:
-      source_file = os.path.join(self.wiki_dir, f)
-      versioned_file = os.path.join(self.wiki_dir, self.version_prefix + f)
-      print 'Updating links in %s.' % (versioned_file,)
-      text = file(source_file, 'r').read()
-      new_text = self.search_for_re.sub(self.replace_with, text)
-      file(versioned_file, 'w').write(new_text)
-
-
-def main():
-  if len(sys.argv) != 2:
-    sys.exit(__doc__)
-
-  brancher = WikiBrancher(sys.argv[1])
-  brancher.BranchFiles()
-  brancher.UpdateLinksInBranchedFiles()
-
-
-if __name__ == '__main__':
-  main()
diff --git a/3rdparty/gtest/scripts/upload.py b/3rdparty/gtest/scripts/upload.py
deleted file mode 100644
index c852e4c9..00000000
--- a/3rdparty/gtest/scripts/upload.py
+++ /dev/null
@@ -1,1387 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2007 Google Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#     http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-"""Tool for uploading diffs from a version control system to the codereview app.
-
-Usage summary: upload.py [options] [-- diff_options]
-
-Diff options are passed to the diff command of the underlying system.
-
-Supported version control systems:
-  Git
-  Mercurial
-  Subversion
-
-It is important for Git/Mercurial users to specify a tree/node/branch to diff
-against by using the '--rev' option.
-"""
-# This code is derived from appcfg.py in the App Engine SDK (open source),
-# and from ASPN recipe #146306.
-
-import cookielib
-import getpass
-import logging
-import md5
-import mimetypes
-import optparse
-import os
-import re
-import socket
-import subprocess
-import sys
-import urllib
-import urllib2
-import urlparse
-
-try:
-  import readline
-except ImportError:
-  pass
-
-# The logging verbosity:
-#  0: Errors only.
-#  1: Status messages.
-#  2: Info logs.
-#  3: Debug logs.
-verbosity = 1
-
-# Max size of patch or base file.
-MAX_UPLOAD_SIZE = 900 * 1024
-
-
-def GetEmail(prompt):
-  """Prompts the user for their email address and returns it.
-
-  The last used email address is saved to a file and offered up as a suggestion
-  to the user. If the user presses enter without typing in anything the last
-  used email address is used. If the user enters a new address, it is saved
-  for next time we prompt.
-
-  """
-  last_email_file_name = os.path.expanduser("~/.last_codereview_email_address")
-  last_email = ""
-  if os.path.exists(last_email_file_name):
-    try:
-      last_email_file = open(last_email_file_name, "r")
-      last_email = last_email_file.readline().strip("\n")
-      last_email_file.close()
-      prompt += " [%s]" % last_email
-    except IOError, e:
-      pass
-  email = raw_input(prompt + ": ").strip()
-  if email:
-    try:
-      last_email_file = open(last_email_file_name, "w")
-      last_email_file.write(email)
-      last_email_file.close()
-    except IOError, e:
-      pass
-  else:
-    email = last_email
-  return email
-
-
-def StatusUpdate(msg):
-  """Print a status message to stdout.
-
-  If 'verbosity' is greater than 0, print the message.
-
-  Args:
-    msg: The string to print.
-  """
-  if verbosity > 0:
-    print msg
-
-
-def ErrorExit(msg):
-  """Print an error message to stderr and exit."""
-  print >>sys.stderr, msg
-  sys.exit(1)
-
-
-class ClientLoginError(urllib2.HTTPError):
-  """Raised to indicate there was an error authenticating with ClientLogin."""
-
-  def __init__(self, url, code, msg, headers, args):
-    urllib2.HTTPError.__init__(self, url, code, msg, headers, None)
-    self.args = args
-    self.reason = args["Error"]
-
-
-class AbstractRpcServer(object):
-  """Provides a common interface for a simple RPC server."""
-
-  def __init__(self, host, auth_function, host_override=None, extra_headers={},
-               save_cookies=False):
-    """Creates a new HttpRpcServer.
-
-    Args:
-      host: The host to send requests to.
-      auth_function: A function that takes no arguments and returns an
-        (email, password) tuple when called. Will be called if authentication
-        is required.
-      host_override: The host header to send to the server (defaults to host).
-      extra_headers: A dict of extra headers to append to every request.
-      save_cookies: If True, save the authentication cookies to local disk.
-        If False, use an in-memory cookiejar instead.  Subclasses must
-        implement this functionality.  Defaults to False.
-    """
-    self.host = host
-    self.host_override = host_override
-    self.auth_function = auth_function
-    self.authenticated = False
-    self.extra_headers = extra_headers
-    self.save_cookies = save_cookies
-    self.opener = self._GetOpener()
-    if self.host_override:
-      logging.info("Server: %s; Host: %s", self.host, self.host_override)
-    else:
-      logging.info("Server: %s", self.host)
-
-  def _GetOpener(self):
-    """Returns an OpenerDirector for making HTTP requests.
-
-    Returns:
-      A urllib2.OpenerDirector object.
-    """
-    raise NotImplementedError()
-
-  def _CreateRequest(self, url, data=None):
-    """Creates a new urllib request."""
-    logging.debug("Creating request for: '%s' with payload:\n%s", url, data)
-    req = urllib2.Request(url, data=data)
-    if self.host_override:
-      req.add_header("Host", self.host_override)
-    for key, value in self.extra_headers.iteritems():
-      req.add_header(key, value)
-    return req
-
-  def _GetAuthToken(self, email, password):
-    """Uses ClientLogin to authenticate the user, returning an auth token.
-
-    Args:
-      email:    The user's email address
-      password: The user's password
-
-    Raises:
-      ClientLoginError: If there was an error authenticating with ClientLogin.
-      HTTPError: If there was some other form of HTTP error.
-
-    Returns:
-      The authentication token returned by ClientLogin.
-    """
-    account_type = "GOOGLE"
-    if self.host.endswith(".google.com"):
-      # Needed for use inside Google.
-      account_type = "HOSTED"
-    req = self._CreateRequest(
-        url="https://www.google.com/accounts/ClientLogin",
-        data=urllib.urlencode({
-            "Email": email,
-            "Passwd": password,
-            "service": "ah",
-            "source": "rietveld-codereview-upload",
-            "accountType": account_type,
-        }),
-    )
-    try:
-      response = self.opener.open(req)
-      response_body = response.read()
-      response_dict = dict(x.split("=")
-                           for x in response_body.split("\n") if x)
-      return response_dict["Auth"]
-    except urllib2.HTTPError, e:
-      if e.code == 403:
-        body = e.read()
-        response_dict = dict(x.split("=", 1) for x in body.split("\n") if x)
-        raise ClientLoginError(req.get_full_url(), e.code, e.msg,
-                               e.headers, response_dict)
-      else:
-        raise
-
-  def _GetAuthCookie(self, auth_token):
-    """Fetches authentication cookies for an authentication token.
-
-    Args:
-      auth_token: The authentication token returned by ClientLogin.
-
-    Raises:
-      HTTPError: If there was an error fetching the authentication cookies.
-    """
-    # This is a dummy value to allow us to identify when we're successful.
-    continue_location = "http://localhost/"
-    args = {"continue": continue_location, "auth": auth_token}
-    req = self._CreateRequest("http://%s/_ah/login?%s" %
-                              (self.host, urllib.urlencode(args)))
-    try:
-      response = self.opener.open(req)
-    except urllib2.HTTPError, e:
-      response = e
-    if (response.code != 302 or
-        response.info()["location"] != continue_location):
-      raise urllib2.HTTPError(req.get_full_url(), response.code, response.msg,
-                              response.headers, response.fp)
-    self.authenticated = True
-
-  def _Authenticate(self):
-    """Authenticates the user.
-
-    The authentication process works as follows:
-     1) We get a username and password from the user
-     2) We use ClientLogin to obtain an AUTH token for the user
-        (see https://developers.google.com/identity/protocols/AuthForInstalledApps).
-     3) We pass the auth token to /_ah/login on the server to obtain an
-        authentication cookie. If login was successful, it tries to redirect
-        us to the URL we provided.
-
-    If we attempt to access the upload API without first obtaining an
-    authentication cookie, it returns a 401 response and directs us to
-    authenticate ourselves with ClientLogin.
-    """
-    for i in range(3):
-      credentials = self.auth_function()
-      try:
-        auth_token = self._GetAuthToken(credentials[0], credentials[1])
-      except ClientLoginError, e:
-        if e.reason == "BadAuthentication":
-          print >>sys.stderr, "Invalid username or password."
-          continue
-        if e.reason == "CaptchaRequired":
-          print >>sys.stderr, (
-              "Please go to\n"
-              "https://www.google.com/accounts/DisplayUnlockCaptcha\n"
-              "and verify you are a human.  Then try again.")
-          break
-        if e.reason == "NotVerified":
-          print >>sys.stderr, "Account not verified."
-          break
-        if e.reason == "TermsNotAgreed":
-          print >>sys.stderr, "User has not agreed to TOS."
-          break
-        if e.reason == "AccountDeleted":
-          print >>sys.stderr, "The user account has been deleted."
-          break
-        if e.reason == "AccountDisabled":
-          print >>sys.stderr, "The user account has been disabled."
-          break
-        if e.reason == "ServiceDisabled":
-          print >>sys.stderr, ("The user's access to the service has been "
-                               "disabled.")
-          break
-        if e.reason == "ServiceUnavailable":
-          print >>sys.stderr, "The service is not available; try again later."
-          break
-        raise
-      self._GetAuthCookie(auth_token)
-      return
-
-  def Send(self, request_path, payload=None,
-           content_type="application/octet-stream",
-           timeout=None,
-           **kwargs):
-    """Sends an RPC and returns the response.
-
-    Args:
-      request_path: The path to send the request to, eg /api/appversion/create.
-      payload: The body of the request, or None to send an empty request.
-      content_type: The Content-Type header to use.
-      timeout: timeout in seconds; default None i.e. no timeout.
-        (Note: for large requests on OS X, the timeout doesn't work right.)
-      kwargs: Any keyword arguments are converted into query string parameters.
-
-    Returns:
-      The response body, as a string.
-    """
-    # TODO: Don't require authentication.  Let the server say
-    # whether it is necessary.
-    if not self.authenticated:
-      self._Authenticate()
-
-    old_timeout = socket.getdefaulttimeout()
-    socket.setdefaulttimeout(timeout)
-    try:
-      tries = 0
-      while True:
-        tries += 1
-        args = dict(kwargs)
-        url = "http://%s%s" % (self.host, request_path)
-        if args:
-          url += "?" + urllib.urlencode(args)
-        req = self._CreateRequest(url=url, data=payload)
-        req.add_header("Content-Type", content_type)
-        try:
-          f = self.opener.open(req)
-          response = f.read()
-          f.close()
-          return response
-        except urllib2.HTTPError, e:
-          if tries > 3:
-            raise
-          elif e.code == 401:
-            self._Authenticate()
-##           elif e.code >= 500 and e.code < 600:
-##             # Server Error - try again.
-##             continue
-          else:
-            raise
-    finally:
-      socket.setdefaulttimeout(old_timeout)
-
-
-class HttpRpcServer(AbstractRpcServer):
-  """Provides a simplified RPC-style interface for HTTP requests."""
-
-  def _Authenticate(self):
-    """Save the cookie jar after authentication."""
-    super(HttpRpcServer, self)._Authenticate()
-    if self.save_cookies:
-      StatusUpdate("Saving authentication cookies to %s" % self.cookie_file)
-      self.cookie_jar.save()
-
-  def _GetOpener(self):
-    """Returns an OpenerDirector that supports cookies and ignores redirects.
-
-    Returns:
-      A urllib2.OpenerDirector object.
-    """
-    opener = urllib2.OpenerDirector()
-    opener.add_handler(urllib2.ProxyHandler())
-    opener.add_handler(urllib2.UnknownHandler())
-    opener.add_handler(urllib2.HTTPHandler())
-    opener.add_handler(urllib2.HTTPDefaultErrorHandler())
-    opener.add_handler(urllib2.HTTPSHandler())
-    opener.add_handler(urllib2.HTTPErrorProcessor())
-    if self.save_cookies:
-      self.cookie_file = os.path.expanduser("~/.codereview_upload_cookies")
-      self.cookie_jar = cookielib.MozillaCookieJar(self.cookie_file)
-      if os.path.exists(self.cookie_file):
-        try:
-          self.cookie_jar.load()
-          self.authenticated = True
-          StatusUpdate("Loaded authentication cookies from %s" %
-                       self.cookie_file)
-        except (cookielib.LoadError, IOError):
-          # Failed to load cookies - just ignore them.
-          pass
-      else:
-        # Create an empty cookie file with mode 600
-        fd = os.open(self.cookie_file, os.O_CREAT, 0600)
-        os.close(fd)
-      # Always chmod the cookie file
-      os.chmod(self.cookie_file, 0600)
-    else:
-      # Don't save cookies across runs of update.py.
-      self.cookie_jar = cookielib.CookieJar()
-    opener.add_handler(urllib2.HTTPCookieProcessor(self.cookie_jar))
-    return opener
-
-
-parser = optparse.OptionParser(usage="%prog [options] [-- diff_options]")
-parser.add_option("-y", "--assume_yes", action="store_true",
-                  dest="assume_yes", default=False,
-                  help="Assume that the answer to yes/no questions is 'yes'.")
-# Logging
-group = parser.add_option_group("Logging options")
-group.add_option("-q", "--quiet", action="store_const", const=0,
-                 dest="verbose", help="Print errors only.")
-group.add_option("-v", "--verbose", action="store_const", const=2,
-                 dest="verbose", default=1,
-                 help="Print info level logs (default).")
-group.add_option("--noisy", action="store_const", const=3,
-                 dest="verbose", help="Print all logs.")
-# Review server
-group = parser.add_option_group("Review server options")
-group.add_option("-s", "--server", action="store", dest="server",
-                 default="codereview.appspot.com",
-                 metavar="SERVER",
-                 help=("The server to upload to. The format is host[:port]. "
-                       "Defaults to 'codereview.appspot.com'."))
-group.add_option("-e", "--email", action="store", dest="email",
-                 metavar="EMAIL", default=None,
-                 help="The username to use. Will prompt if omitted.")
-group.add_option("-H", "--host", action="store", dest="host",
-                 metavar="HOST", default=None,
-                 help="Overrides the Host header sent with all RPCs.")
-group.add_option("--no_cookies", action="store_false",
-                 dest="save_cookies", default=True,
-                 help="Do not save authentication cookies to local disk.")
-# Issue
-group = parser.add_option_group("Issue options")
-group.add_option("-d", "--description", action="store", dest="description",
-                 metavar="DESCRIPTION", default=None,
-                 help="Optional description when creating an issue.")
-group.add_option("-f", "--description_file", action="store",
-                 dest="description_file", metavar="DESCRIPTION_FILE",
-                 default=None,
-                 help="Optional path of a file that contains "
-                      "the description when creating an issue.")
-group.add_option("-r", "--reviewers", action="store", dest="reviewers",
-                 metavar="REVIEWERS", default=None,
-                 help="Add reviewers (comma separated email addresses).")
-group.add_option("--cc", action="store", dest="cc",
-                 metavar="CC", default=None,
-                 help="Add CC (comma separated email addresses).")
-# Upload options
-group = parser.add_option_group("Patch options")
-group.add_option("-m", "--message", action="store", dest="message",
-                 metavar="MESSAGE", default=None,
-                 help="A message to identify the patch. "
-                      "Will prompt if omitted.")
-group.add_option("-i", "--issue", type="int", action="store",
-                 metavar="ISSUE", default=None,
-                 help="Issue number to which to add. Defaults to new issue.")
-group.add_option("--download_base", action="store_true",
-                 dest="download_base", default=False,
-                 help="Base files will be downloaded by the server "
-                 "(side-by-side diffs may not work on files with CRs).")
-group.add_option("--rev", action="store", dest="revision",
-                 metavar="REV", default=None,
-                 help="Branch/tree/revision to diff against (used by DVCS).")
-group.add_option("--send_mail", action="store_true",
-                 dest="send_mail", default=False,
-                 help="Send notification email to reviewers.")
-
-
-def GetRpcServer(options):
-  """Returns an instance of an AbstractRpcServer.
-
-  Returns:
-    A new AbstractRpcServer, on which RPC calls can be made.
-  """
-
-  rpc_server_class = HttpRpcServer
-
-  def GetUserCredentials():
-    """Prompts the user for a username and password."""
-    email = options.email
-    if email is None:
-      email = GetEmail("Email (login for uploading to %s)" % options.server)
-    password = getpass.getpass("Password for %s: " % email)
-    return (email, password)
-
-  # If this is the dev_appserver, use fake authentication.
-  host = (options.host or options.server).lower()
-  if host == "localhost" or host.startswith("localhost:"):
-    email = options.email
-    if email is None:
-      email = "test@example.com"
-      logging.info("Using debug user %s.  Override with --email" % email)
-    server = rpc_server_class(
-        options.server,
-        lambda: (email, "password"),
-        host_override=options.host,
-        extra_headers={"Cookie":
-                       'dev_appserver_login="%s:False"' % email},
-        save_cookies=options.save_cookies)
-    # Don't try to talk to ClientLogin.
-    server.authenticated = True
-    return server
-
-  return rpc_server_class(options.server, GetUserCredentials,
-                          host_override=options.host,
-                          save_cookies=options.save_cookies)
-
-
-def EncodeMultipartFormData(fields, files):
-  """Encode form fields for multipart/form-data.
-
-  Args:
-    fields: A sequence of (name, value) elements for regular form fields.
-    files: A sequence of (name, filename, value) elements for data to be
-           uploaded as files.
-  Returns:
-    (content_type, body) ready for httplib.HTTP instance.
-
-  Source:
-    https://web.archive.org/web/20160116052001/code.activestate.com/recipes/146306
-  """
-  BOUNDARY = '-M-A-G-I-C---B-O-U-N-D-A-R-Y-'
-  CRLF = '\r\n'
-  lines = []
-  for (key, value) in fields:
-    lines.append('--' + BOUNDARY)
-    lines.append('Content-Disposition: form-data; name="%s"' % key)
-    lines.append('')
-    lines.append(value)
-  for (key, filename, value) in files:
-    lines.append('--' + BOUNDARY)
-    lines.append('Content-Disposition: form-data; name="%s"; filename="%s"' %
-             (key, filename))
-    lines.append('Content-Type: %s' % GetContentType(filename))
-    lines.append('')
-    lines.append(value)
-  lines.append('--' + BOUNDARY + '--')
-  lines.append('')
-  body = CRLF.join(lines)
-  content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
-  return content_type, body
-
-
-def GetContentType(filename):
-  """Helper to guess the content-type from the filename."""
-  return mimetypes.guess_type(filename)[0] or 'application/octet-stream'
-
-
-# Use a shell for subcommands on Windows to get a PATH search.
-use_shell = sys.platform.startswith("win")
-
-def RunShellWithReturnCode(command, print_output=False,
-                           universal_newlines=True):
-  """Executes a command and returns the output from stdout and the return code.
-
-  Args:
-    command: Command to execute.
-    print_output: If True, the output is printed to stdout.
-                  If False, both stdout and stderr are ignored.
-    universal_newlines: Use universal_newlines flag (default: True).
-
-  Returns:
-    Tuple (output, return code)
-  """
-  logging.info("Running %s", command)
-  p = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE,
-                       shell=use_shell, universal_newlines=universal_newlines)
-  if print_output:
-    output_array = []
-    while True:
-      line = p.stdout.readline()
-      if not line:
-        break
-      print line.strip("\n")
-      output_array.append(line)
-    output = "".join(output_array)
-  else:
-    output = p.stdout.read()
-  p.wait()
-  errout = p.stderr.read()
-  if print_output and errout:
-    print >>sys.stderr, errout
-  p.stdout.close()
-  p.stderr.close()
-  return output, p.returncode
-
-
-def RunShell(command, silent_ok=False, universal_newlines=True,
-             print_output=False):
-  data, retcode = RunShellWithReturnCode(command, print_output,
-                                         universal_newlines)
-  if retcode:
-    ErrorExit("Got error status from %s:\n%s" % (command, data))
-  if not silent_ok and not data:
-    ErrorExit("No output from %s" % command)
-  return data
-
-
-class VersionControlSystem(object):
-  """Abstract base class providing an interface to the VCS."""
-
-  def __init__(self, options):
-    """Constructor.
-
-    Args:
-      options: Command line options.
-    """
-    self.options = options
-
-  def GenerateDiff(self, args):
-    """Return the current diff as a string.
-
-    Args:
-      args: Extra arguments to pass to the diff command.
-    """
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-  def GetUnknownFiles(self):
-    """Return a list of files unknown to the VCS."""
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-  def CheckForUnknownFiles(self):
-    """Show an "are you sure?" prompt if there are unknown files."""
-    unknown_files = self.GetUnknownFiles()
-    if unknown_files:
-      print "The following files are not added to version control:"
-      for line in unknown_files:
-        print line
-      prompt = "Are you sure to continue?(y/N) "
-      answer = raw_input(prompt).strip()
-      if answer != "y":
-        ErrorExit("User aborted")
-
-  def GetBaseFile(self, filename):
-    """Get the content of the upstream version of a file.
-
-    Returns:
-      A tuple (base_content, new_content, is_binary, status)
-        base_content: The contents of the base file.
-        new_content: For text files, this is empty.  For binary files, this is
-          the contents of the new file, since the diff output won't contain
-          information to reconstruct the current file.
-        is_binary: True iff the file is binary.
-        status: The status of the file.
-    """
-
-    raise NotImplementedError(
-        "abstract method -- subclass %s must override" % self.__class__)
-
-
-  def GetBaseFiles(self, diff):
-    """Helper that calls GetBase file for each file in the patch.
-
-    Returns:
-      A dictionary that maps from filename to GetBaseFile's tuple.  Filenames
-      are retrieved based on lines that start with "Index:" or
-      "Property changes on:".
-    """
-    files = {}
-    for line in diff.splitlines(True):
-      if line.startswith('Index:') or line.startswith('Property changes on:'):
-        unused, filename = line.split(':', 1)
-        # On Windows if a file has property changes its filename uses '\'
-        # instead of '/'.
-        filename = filename.strip().replace('\\', '/')
-        files[filename] = self.GetBaseFile(filename)
-    return files
-
-
-  def UploadBaseFiles(self, issue, rpc_server, patch_list, patchset, options,
-                      files):
-    """Uploads the base files (and if necessary, the current ones as well)."""
-
-    def UploadFile(filename, file_id, content, is_binary, status, is_base):
-      """Uploads a file to the server."""
-      file_too_large = False
-      if is_base:
-        type = "base"
-      else:
-        type = "current"
-      if len(content) > MAX_UPLOAD_SIZE:
-        print ("Not uploading the %s file for %s because it's too large." %
-               (type, filename))
-        file_too_large = True
-        content = ""
-      checksum = md5.new(content).hexdigest()
-      if options.verbose > 0 and not file_too_large:
-        print "Uploading %s file for %s" % (type, filename)
-      url = "/%d/upload_content/%d/%d" % (int(issue), int(patchset), file_id)
-      form_fields = [("filename", filename),
-                     ("status", status),
-                     ("checksum", checksum),
-                     ("is_binary", str(is_binary)),
-                     ("is_current", str(not is_base)),
-                    ]
-      if file_too_large:
-        form_fields.append(("file_too_large", "1"))
-      if options.email:
-        form_fields.append(("user", options.email))
-      ctype, body = EncodeMultipartFormData(form_fields,
-                                            [("data", filename, content)])
-      response_body = rpc_server.Send(url, body,
-                                      content_type=ctype)
-      if not response_body.startswith("OK"):
-        StatusUpdate("  --> %s" % response_body)
-        sys.exit(1)
-
-    patches = dict()
-    [patches.setdefault(v, k) for k, v in patch_list]
-    for filename in patches.keys():
-      base_content, new_content, is_binary, status = files[filename]
-      file_id_str = patches.get(filename)
-      if file_id_str.find("nobase") != -1:
-        base_content = None
-        file_id_str = file_id_str[file_id_str.rfind("_") + 1:]
-      file_id = int(file_id_str)
-      if base_content != None:
-        UploadFile(filename, file_id, base_content, is_binary, status, True)
-      if new_content != None:
-        UploadFile(filename, file_id, new_content, is_binary, status, False)
-
-  def IsImage(self, filename):
-    """Returns true if the filename has an image extension."""
-    mimetype =  mimetypes.guess_type(filename)[0]
-    if not mimetype:
-      return False
-    return mimetype.startswith("image/")
-
-
-class SubversionVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Subversion."""
-
-  def __init__(self, options):
-    super(SubversionVCS, self).__init__(options)
-    if self.options.revision:
-      match = re.match(r"(\d+)(:(\d+))?", self.options.revision)
-      if not match:
-        ErrorExit("Invalid Subversion revision %s." % self.options.revision)
-      self.rev_start = match.group(1)
-      self.rev_end = match.group(3)
-    else:
-      self.rev_start = self.rev_end = None
-    # Cache output from "svn list -r REVNO dirname".
-    # Keys: dirname, Values: 2-tuple (output for start rev and end rev).
-    self.svnls_cache = {}
-    # SVN base URL is required to fetch files deleted in an older revision.
-    # Result is cached to not guess it over and over again in GetBaseFile().
-    required = self.options.download_base or self.options.revision is not None
-    self.svn_base = self._GuessBase(required)
-
-  def GuessBase(self, required):
-    """Wrapper for _GuessBase."""
-    return self.svn_base
-
-  def _GuessBase(self, required):
-    """Returns the SVN base URL.
-
-    Args:
-      required: If true, exits if the url can't be guessed, otherwise None is
-        returned.
-    """
-    info = RunShell(["svn", "info"])
-    for line in info.splitlines():
-      words = line.split()
-      if len(words) == 2 and words[0] == "URL:":
-        url = words[1]
-        scheme, netloc, path, params, query, fragment = urlparse.urlparse(url)
-        username, netloc = urllib.splituser(netloc)
-        if username:
-          logging.info("Removed username from base URL")
-        if netloc.endswith("svn.python.org"):
-          if netloc == "svn.python.org":
-            if path.startswith("/projects/"):
-              path = path[9:]
-          elif netloc != "pythondev@svn.python.org":
-            ErrorExit("Unrecognized Python URL: %s" % url)
-          base = "http://svn.python.org/view/*checkout*%s/" % path
-          logging.info("Guessed Python base = %s", base)
-        elif netloc.endswith("svn.collab.net"):
-          if path.startswith("/repos/"):
-            path = path[6:]
-          base = "http://svn.collab.net/viewvc/*checkout*%s/" % path
-          logging.info("Guessed CollabNet base = %s", base)
-        elif netloc.endswith(".googlecode.com"):
-          path = path + "/"
-          base = urlparse.urlunparse(("http", netloc, path, params,
-                                      query, fragment))
-          logging.info("Guessed Google Code base = %s", base)
-        else:
-          path = path + "/"
-          base = urlparse.urlunparse((scheme, netloc, path, params,
-                                      query, fragment))
-          logging.info("Guessed base = %s", base)
-        return base
-    if required:
-      ErrorExit("Can't find URL in output from svn info")
-    return None
-
-  def GenerateDiff(self, args):
-    cmd = ["svn", "diff"]
-    if self.options.revision:
-      cmd += ["-r", self.options.revision]
-    cmd.extend(args)
-    data = RunShell(cmd)
-    count = 0
-    for line in data.splitlines():
-      if line.startswith("Index:") or line.startswith("Property changes on:"):
-        count += 1
-        logging.info(line)
-    if not count:
-      ErrorExit("No valid patches found in output from svn diff")
-    return data
-
-  def _CollapseKeywords(self, content, keyword_str):
-    """Collapses SVN keywords."""
-    # svn cat translates keywords but svn diff doesn't. As a result of this
-    # behavior patching.PatchChunks() fails with a chunk mismatch error.
-    # This part was originally written by the Review Board development team
-    # who had the same problem (https://reviews.reviewboard.org/r/276/).
-    # Mapping of keywords to known aliases
-    svn_keywords = {
-      # Standard keywords
-      'Date':                ['Date', 'LastChangedDate'],
-      'Revision':            ['Revision', 'LastChangedRevision', 'Rev'],
-      'Author':              ['Author', 'LastChangedBy'],
-      'HeadURL':             ['HeadURL', 'URL'],
-      'Id':                  ['Id'],
-
-      # Aliases
-      'LastChangedDate':     ['LastChangedDate', 'Date'],
-      'LastChangedRevision': ['LastChangedRevision', 'Rev', 'Revision'],
-      'LastChangedBy':       ['LastChangedBy', 'Author'],
-      'URL':                 ['URL', 'HeadURL'],
-    }
-
-    def repl(m):
-       if m.group(2):
-         return "$%s::%s$" % (m.group(1), " " * len(m.group(3)))
-       return "$%s$" % m.group(1)
-    keywords = [keyword
-                for name in keyword_str.split(" ")
-                for keyword in svn_keywords.get(name, [])]
-    return re.sub(r"\$(%s):(:?)([^\$]+)\$" % '|'.join(keywords), repl, content)
-
-  def GetUnknownFiles(self):
-    status = RunShell(["svn", "status", "--ignore-externals"], silent_ok=True)
-    unknown_files = []
-    for line in status.split("\n"):
-      if line and line[0] == "?":
-        unknown_files.append(line)
-    return unknown_files
-
-  def ReadFile(self, filename):
-    """Returns the contents of a file."""
-    file = open(filename, 'rb')
-    result = ""
-    try:
-      result = file.read()
-    finally:
-      file.close()
-    return result
-
-  def GetStatus(self, filename):
-    """Returns the status of a file."""
-    if not self.options.revision:
-      status = RunShell(["svn", "status", "--ignore-externals", filename])
-      if not status:
-        ErrorExit("svn status returned no output for %s" % filename)
-      status_lines = status.splitlines()
-      # If file is in a cl, the output will begin with
-      # "\n--- Changelist 'cl_name':\n".  See
-      # https://web.archive.org/web/20090918234815/svn.collab.net/repos/svn/trunk/notes/changelist-design.txt
-      if (len(status_lines) == 3 and
-          not status_lines[0] and
-          status_lines[1].startswith("--- Changelist")):
-        status = status_lines[2]
-      else:
-        status = status_lines[0]
-    # If we have a revision to diff against we need to run "svn list"
-    # for the old and the new revision and compare the results to get
-    # the correct status for a file.
-    else:
-      dirname, relfilename = os.path.split(filename)
-      if dirname not in self.svnls_cache:
-        cmd = ["svn", "list", "-r", self.rev_start, dirname or "."]
-        out, returncode = RunShellWithReturnCode(cmd)
-        if returncode:
-          ErrorExit("Failed to get status for %s." % filename)
-        old_files = out.splitlines()
-        args = ["svn", "list"]
-        if self.rev_end:
-          args += ["-r", self.rev_end]
-        cmd = args + [dirname or "."]
-        out, returncode = RunShellWithReturnCode(cmd)
-        if returncode:
-          ErrorExit("Failed to run command %s" % cmd)
-        self.svnls_cache[dirname] = (old_files, out.splitlines())
-      old_files, new_files = self.svnls_cache[dirname]
-      if relfilename in old_files and relfilename not in new_files:
-        status = "D   "
-      elif relfilename in old_files and relfilename in new_files:
-        status = "M   "
-      else:
-        status = "A   "
-    return status
-
-  def GetBaseFile(self, filename):
-    status = self.GetStatus(filename)
-    base_content = None
-    new_content = None
-
-    # If a file is copied its status will be "A  +", which signifies
-    # "addition-with-history".  See "svn st" for more information.  We need to
-    # upload the original file or else diff parsing will fail if the file was
-    # edited.
-    if status[0] == "A" and status[3] != "+":
-      # We'll need to upload the new content if we're adding a binary file
-      # since diff's output won't contain it.
-      mimetype = RunShell(["svn", "propget", "svn:mime-type", filename],
-                          silent_ok=True)
-      base_content = ""
-      is_binary = mimetype and not mimetype.startswith("text/")
-      if is_binary and self.IsImage(filename):
-        new_content = self.ReadFile(filename)
-    elif (status[0] in ("M", "D", "R") or
-          (status[0] == "A" and status[3] == "+") or  # Copied file.
-          (status[0] == " " and status[1] == "M")):  # Property change.
-      args = []
-      if self.options.revision:
-        url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-      else:
-        # Don't change filename, it's needed later.
-        url = filename
-        args += ["-r", "BASE"]
-      cmd = ["svn"] + args + ["propget", "svn:mime-type", url]
-      mimetype, returncode = RunShellWithReturnCode(cmd)
-      if returncode:
-        # File does not exist in the requested revision.
-        # Reset mimetype, it contains an error message.
-        mimetype = ""
-      get_base = False
-      is_binary = mimetype and not mimetype.startswith("text/")
-      if status[0] == " ":
-        # Empty base content just to force an upload.
-        base_content = ""
-      elif is_binary:
-        if self.IsImage(filename):
-          get_base = True
-          if status[0] == "M":
-            if not self.rev_end:
-              new_content = self.ReadFile(filename)
-            else:
-              url = "%s/%s@%s" % (self.svn_base, filename, self.rev_end)
-              new_content = RunShell(["svn", "cat", url],
-                                     universal_newlines=True, silent_ok=True)
-        else:
-          base_content = ""
-      else:
-        get_base = True
-
-      if get_base:
-        if is_binary:
-          universal_newlines = False
-        else:
-          universal_newlines = True
-        if self.rev_start:
-          # "svn cat -r REV delete_file.txt" doesn't work. cat requires
-          # the full URL with "@REV" appended instead of using "-r" option.
-          url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-          base_content = RunShell(["svn", "cat", url],
-                                  universal_newlines=universal_newlines,
-                                  silent_ok=True)
-        else:
-          base_content = RunShell(["svn", "cat", filename],
-                                  universal_newlines=universal_newlines,
-                                  silent_ok=True)
-        if not is_binary:
-          args = []
-          if self.rev_start:
-            url = "%s/%s@%s" % (self.svn_base, filename, self.rev_start)
-          else:
-            url = filename
-            args += ["-r", "BASE"]
-          cmd = ["svn"] + args + ["propget", "svn:keywords", url]
-          keywords, returncode = RunShellWithReturnCode(cmd)
-          if keywords and not returncode:
-            base_content = self._CollapseKeywords(base_content, keywords)
-    else:
-      StatusUpdate("svn status returned unexpected output: %s" % status)
-      sys.exit(1)
-    return base_content, new_content, is_binary, status[0:5]
-
-
-class GitVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Git."""
-
-  def __init__(self, options):
-    super(GitVCS, self).__init__(options)
-    # Map of filename -> hash of base file.
-    self.base_hashes = {}
-
-  def GenerateDiff(self, extra_args):
-    # This is more complicated than svn's GenerateDiff because we must convert
-    # the diff output to include an svn-style "Index:" line as well as record
-    # the hashes of the base files, so we can upload them along with our diff.
-    if self.options.revision:
-      extra_args = [self.options.revision] + extra_args
-    gitdiff = RunShell(["git", "diff", "--full-index"] + extra_args)
-    svndiff = []
-    filecount = 0
-    filename = None
-    for line in gitdiff.splitlines():
-      match = re.match(r"diff --git a/(.*) b/.*$", line)
-      if match:
-        filecount += 1
-        filename = match.group(1)
-        svndiff.append("Index: %s\n" % filename)
-      else:
-        # The "index" line in a git diff looks like this (long hashes elided):
-        #   index 82c0d44..b2cee3f 100755
-        # We want to save the left hash, as that identifies the base file.
-        match = re.match(r"index (\w+)\.\.", line)
-        if match:
-          self.base_hashes[filename] = match.group(1)
-      svndiff.append(line + "\n")
-    if not filecount:
-      ErrorExit("No valid patches found in output from git diff")
-    return "".join(svndiff)
-
-  def GetUnknownFiles(self):
-    status = RunShell(["git", "ls-files", "--exclude-standard", "--others"],
-                      silent_ok=True)
-    return status.splitlines()
-
-  def GetBaseFile(self, filename):
-    hash = self.base_hashes[filename]
-    base_content = None
-    new_content = None
-    is_binary = False
-    if hash == "0" * 40:  # All-zero hash indicates no base file.
-      status = "A"
-      base_content = ""
-    else:
-      status = "M"
-      base_content, returncode = RunShellWithReturnCode(["git", "show", hash])
-      if returncode:
-        ErrorExit("Got error status from 'git show %s'" % hash)
-    return (base_content, new_content, is_binary, status)
-
-
-class MercurialVCS(VersionControlSystem):
-  """Implementation of the VersionControlSystem interface for Mercurial."""
-
-  def __init__(self, options, repo_dir):
-    super(MercurialVCS, self).__init__(options)
-    # Absolute path to repository (we can be in a subdir)
-    self.repo_dir = os.path.normpath(repo_dir)
-    # Compute the subdir
-    cwd = os.path.normpath(os.getcwd())
-    assert cwd.startswith(self.repo_dir)
-    self.subdir = cwd[len(self.repo_dir):].lstrip(r"\/")
-    if self.options.revision:
-      self.base_rev = self.options.revision
-    else:
-      self.base_rev = RunShell(["hg", "parent", "-q"]).split(':')[1].strip()
-
-  def _GetRelPath(self, filename):
-    """Get relative path of a file according to the current directory,
-    given its logical path in the repo."""
-    assert filename.startswith(self.subdir), filename
-    return filename[len(self.subdir):].lstrip(r"\/")
-
-  def GenerateDiff(self, extra_args):
-    # If no file specified, restrict to the current subdir
-    extra_args = extra_args or ["."]
-    cmd = ["hg", "diff", "--git", "-r", self.base_rev] + extra_args
-    data = RunShell(cmd, silent_ok=True)
-    svndiff = []
-    filecount = 0
-    for line in data.splitlines():
-      m = re.match("diff --git a/(\S+) b/(\S+)", line)
-      if m:
-        # Modify line to make it look like as it comes from svn diff.
-        # With this modification no changes on the server side are required
-        # to make upload.py work with Mercurial repos.
-        # NOTE: for proper handling of moved/copied files, we have to use
-        # the second filename.
-        filename = m.group(2)
-        svndiff.append("Index: %s" % filename)
-        svndiff.append("=" * 67)
-        filecount += 1
-        logging.info(line)
-      else:
-        svndiff.append(line)
-    if not filecount:
-      ErrorExit("No valid patches found in output from hg diff")
-    return "\n".join(svndiff) + "\n"
-
-  def GetUnknownFiles(self):
-    """Return a list of files unknown to the VCS."""
-    args = []
-    status = RunShell(["hg", "status", "--rev", self.base_rev, "-u", "."],
-        silent_ok=True)
-    unknown_files = []
-    for line in status.splitlines():
-      st, fn = line.split(" ", 1)
-      if st == "?":
-        unknown_files.append(fn)
-    return unknown_files
-
-  def GetBaseFile(self, filename):
-    # "hg status" and "hg cat" both take a path relative to the current subdir
-    # rather than to the repo root, but "hg diff" has given us the full path
-    # to the repo root.
-    base_content = ""
-    new_content = None
-    is_binary = False
-    oldrelpath = relpath = self._GetRelPath(filename)
-    # "hg status -C" returns two lines for moved/copied files, one otherwise
-    out = RunShell(["hg", "status", "-C", "--rev", self.base_rev, relpath])
-    out = out.splitlines()
-    # HACK: strip error message about missing file/directory if it isn't in
-    # the working copy
-    if out[0].startswith('%s: ' % relpath):
-      out = out[1:]
-    if len(out) > 1:
-      # Moved/copied => considered as modified, use old filename to
-      # retrieve base contents
-      oldrelpath = out[1].strip()
-      status = "M"
-    else:
-      status, _ = out[0].split(' ', 1)
-    if status != "A":
-      base_content = RunShell(["hg", "cat", "-r", self.base_rev, oldrelpath],
-        silent_ok=True)
-      is_binary = "\0" in base_content  # Mercurial's heuristic
-    if status != "R":
-      new_content = open(relpath, "rb").read()
-      is_binary = is_binary or "\0" in new_content
-    if is_binary and base_content:
-      # Fetch again without converting newlines
-      base_content = RunShell(["hg", "cat", "-r", self.base_rev, oldrelpath],
-        silent_ok=True, universal_newlines=False)
-    if not is_binary or not self.IsImage(relpath):
-      new_content = None
-    return base_content, new_content, is_binary, status
-
-
-# NOTE: The SplitPatch function is duplicated in engine.py, keep them in sync.
-def SplitPatch(data):
-  """Splits a patch into separate pieces for each file.
-
-  Args:
-    data: A string containing the output of svn diff.
-
-  Returns:
-    A list of 2-tuple (filename, text) where text is the svn diff output
-      pertaining to filename.
-  """
-  patches = []
-  filename = None
-  diff = []
-  for line in data.splitlines(True):
-    new_filename = None
-    if line.startswith('Index:'):
-      unused, new_filename = line.split(':', 1)
-      new_filename = new_filename.strip()
-    elif line.startswith('Property changes on:'):
-      unused, temp_filename = line.split(':', 1)
-      # When a file is modified, paths use '/' between directories, however
-      # when a property is modified '\' is used on Windows.  Make them the same
-      # otherwise the file shows up twice.
-      temp_filename = temp_filename.strip().replace('\\', '/')
-      if temp_filename != filename:
-        # File has property changes but no modifications, create a new diff.
-        new_filename = temp_filename
-    if new_filename:
-      if filename and diff:
-        patches.append((filename, ''.join(diff)))
-      filename = new_filename
-      diff = [line]
-      continue
-    if diff is not None:
-      diff.append(line)
-  if filename and diff:
-    patches.append((filename, ''.join(diff)))
-  return patches
-
-
-def UploadSeparatePatches(issue, rpc_server, patchset, data, options):
-  """Uploads a separate patch for each file in the diff output.
-
-  Returns a list of [patch_key, filename] for each file.
-  """
-  patches = SplitPatch(data)
-  rv = []
-  for patch in patches:
-    if len(patch[1]) > MAX_UPLOAD_SIZE:
-      print ("Not uploading the patch for " + patch[0] +
-             " because the file is too large.")
-      continue
-    form_fields = [("filename", patch[0])]
-    if not options.download_base:
-      form_fields.append(("content_upload", "1"))
-    files = [("data", "data.diff", patch[1])]
-    ctype, body = EncodeMultipartFormData(form_fields, files)
-    url = "/%d/upload_patch/%d" % (int(issue), int(patchset))
-    print "Uploading patch for " + patch[0]
-    response_body = rpc_server.Send(url, body, content_type=ctype)
-    lines = response_body.splitlines()
-    if not lines or lines[0] != "OK":
-      StatusUpdate("  --> %s" % response_body)
-      sys.exit(1)
-    rv.append([lines[1], patch[0]])
-  return rv
-
-
-def GuessVCS(options):
-  """Helper to guess the version control system.
-
-  This examines the current directory, guesses which VersionControlSystem
-  we're using, and returns an instance of the appropriate class.  Exit with an
-  error if we can't figure it out.
-
-  Returns:
-    A VersionControlSystem instance. Exits if the VCS can't be guessed.
-  """
-  # Mercurial has a command to get the base directory of a repository
-  # Try running it, but don't die if we don't have hg installed.
-  # NOTE: we try Mercurial first as it can sit on top of an SVN working copy.
-  try:
-    out, returncode = RunShellWithReturnCode(["hg", "root"])
-    if returncode == 0:
-      return MercurialVCS(options, out.strip())
-  except OSError, (errno, message):
-    if errno != 2:  # ENOENT -- they don't have hg installed.
-      raise
-
-  # Subversion has a .svn in all working directories.
-  if os.path.isdir('.svn'):
-    logging.info("Guessed VCS = Subversion")
-    return SubversionVCS(options)
-
-  # Git has a command to test if you're in a git tree.
-  # Try running it, but don't die if we don't have git installed.
-  try:
-    out, returncode = RunShellWithReturnCode(["git", "rev-parse",
-                                              "--is-inside-work-tree"])
-    if returncode == 0:
-      return GitVCS(options)
-  except OSError, (errno, message):
-    if errno != 2:  # ENOENT -- they don't have git installed.
-      raise
-
-  ErrorExit(("Could not guess version control system. "
-             "Are you in a working copy directory?"))
-
-
-def RealMain(argv, data=None):
-  """The real main function.
-
-  Args:
-    argv: Command line arguments.
-    data: Diff contents. If None (default) the diff is generated by
-      the VersionControlSystem implementation returned by GuessVCS().
-
-  Returns:
-    A 2-tuple (issue id, patchset id).
-    The patchset id is None if the base files are not uploaded by this
-    script (applies only to SVN checkouts).
-  """
-  logging.basicConfig(format=("%(asctime).19s %(levelname)s %(filename)s:"
-                              "%(lineno)s %(message)s "))
-  os.environ['LC_ALL'] = 'C'
-  options, args = parser.parse_args(argv[1:])
-  global verbosity
-  verbosity = options.verbose
-  if verbosity >= 3:
-    logging.getLogger().setLevel(logging.DEBUG)
-  elif verbosity >= 2:
-    logging.getLogger().setLevel(logging.INFO)
-  vcs = GuessVCS(options)
-  if isinstance(vcs, SubversionVCS):
-    # base field is only allowed for Subversion.
-    # Note: Fetching base files may become deprecated in future releases.
-    base = vcs.GuessBase(options.download_base)
-  else:
-    base = None
-  if not base and options.download_base:
-    options.download_base = True
-    logging.info("Enabled upload of base file")
-  if not options.assume_yes:
-    vcs.CheckForUnknownFiles()
-  if data is None:
-    data = vcs.GenerateDiff(args)
-  files = vcs.GetBaseFiles(data)
-  if verbosity >= 1:
-    print "Upload server:", options.server, "(change with -s/--server)"
-  if options.issue:
-    prompt = "Message describing this patch set: "
-  else:
-    prompt = "New issue subject: "
-  message = options.message or raw_input(prompt).strip()
-  if not message:
-    ErrorExit("A non-empty message is required")
-  rpc_server = GetRpcServer(options)
-  form_fields = [("subject", message)]
-  if base:
-    form_fields.append(("base", base))
-  if options.issue:
-    form_fields.append(("issue", str(options.issue)))
-  if options.email:
-    form_fields.append(("user", options.email))
-  if options.reviewers:
-    for reviewer in options.reviewers.split(','):
-      if "@" in reviewer and not reviewer.split("@")[1].count(".") == 1:
-        ErrorExit("Invalid email address: %s" % reviewer)
-    form_fields.append(("reviewers", options.reviewers))
-  if options.cc:
-    for cc in options.cc.split(','):
-      if "@" in cc and not cc.split("@")[1].count(".") == 1:
-        ErrorExit("Invalid email address: %s" % cc)
-    form_fields.append(("cc", options.cc))
-  description = options.description
-  if options.description_file:
-    if options.description:
-      ErrorExit("Can't specify description and description_file")
-    file = open(options.description_file, 'r')
-    description = file.read()
-    file.close()
-  if description:
-    form_fields.append(("description", description))
-  # Send a hash of all the base file so the server can determine if a copy
-  # already exists in an earlier patchset.
-  base_hashes = ""
-  for file, info in files.iteritems():
-    if not info[0] is None:
-      checksum = md5.new(info[0]).hexdigest()
-      if base_hashes:
-        base_hashes += "|"
-      base_hashes += checksum + ":" + file
-  form_fields.append(("base_hashes", base_hashes))
-  # If we're uploading base files, don't send the email before the uploads, so
-  # that it contains the file status.
-  if options.send_mail and options.download_base:
-    form_fields.append(("send_mail", "1"))
-  if not options.download_base:
-    form_fields.append(("content_upload", "1"))
-  if len(data) > MAX_UPLOAD_SIZE:
-    print "Patch is large, so uploading file patches separately."
-    uploaded_diff_file = []
-    form_fields.append(("separate_patches", "1"))
-  else:
-    uploaded_diff_file = [("data", "data.diff", data)]
-  ctype, body = EncodeMultipartFormData(form_fields, uploaded_diff_file)
-  response_body = rpc_server.Send("/upload", body, content_type=ctype)
-  patchset = None
-  if not options.download_base or not uploaded_diff_file:
-    lines = response_body.splitlines()
-    if len(lines) >= 2:
-      msg = lines[0]
-      patchset = lines[1].strip()
-      patches = [x.split(" ", 1) for x in lines[2:]]
-    else:
-      msg = response_body
-  else:
-    msg = response_body
-  StatusUpdate(msg)
-  if not response_body.startswith("Issue created.") and \
-  not response_body.startswith("Issue updated."):
-    sys.exit(0)
-  issue = msg[msg.rfind("/")+1:]
-
-  if not uploaded_diff_file:
-    result = UploadSeparatePatches(issue, rpc_server, patchset, data, options)
-    if not options.download_base:
-      patches = result
-
-  if not options.download_base:
-    vcs.UploadBaseFiles(issue, rpc_server, patches, patchset, options, files)
-    if options.send_mail:
-      rpc_server.Send("/" + issue + "/mail", payload="")
-  return issue, patchset
-
-
-def main():
-  try:
-    RealMain(sys.argv)
-  except KeyboardInterrupt:
-    print
-    StatusUpdate("Interrupted.")
-    sys.exit(1)
-
-
-if __name__ == "__main__":
-  main()
diff --git a/3rdparty/gtest/scripts/upload_gtest.py b/3rdparty/gtest/scripts/upload_gtest.py
deleted file mode 100644
index be19ae80..00000000
--- a/3rdparty/gtest/scripts/upload_gtest.py
+++ /dev/null
@@ -1,78 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""upload_gtest.py v0.1.0 -- uploads a Google Test patch for review.
-
-This simple wrapper passes all command line flags and
---cc=googletestframework@googlegroups.com to upload.py.
-
-USAGE: upload_gtest.py [options for upload.py]
-"""
-
-__author__ = 'wan@google.com (Zhanyong Wan)'
-
-import os
-import sys
-
-CC_FLAG = '--cc='
-GTEST_GROUP = 'googletestframework@googlegroups.com'
-
-
-def main():
-  # Finds the path to upload.py, assuming it is in the same directory
-  # as this file.
-  my_dir = os.path.dirname(os.path.abspath(__file__))
-  upload_py_path = os.path.join(my_dir, 'upload.py')
-
-  # Adds Google Test discussion group to the cc line if it's not there
-  # already.
-  upload_py_argv = [upload_py_path]
-  found_cc_flag = False
-  for arg in sys.argv[1:]:
-    if arg.startswith(CC_FLAG):
-      found_cc_flag = True
-      cc_line = arg[len(CC_FLAG):]
-      cc_list = [addr for addr in cc_line.split(',') if addr]
-      if GTEST_GROUP not in cc_list:
-        cc_list.append(GTEST_GROUP)
-      upload_py_argv.append(CC_FLAG + ','.join(cc_list))
-    else:
-      upload_py_argv.append(arg)
-
-  if not found_cc_flag:
-    upload_py_argv.append(CC_FLAG + GTEST_GROUP)
-
-  # Invokes upload.py with the modified command line flags.
-  os.execv(upload_py_path, upload_py_argv)
-
-
-if __name__ == '__main__':
-  main()
diff --git a/3rdparty/gtest/src/gtest-all.cc b/3rdparty/gtest/src/gtest-all.cc
deleted file mode 100644
index ad292905..00000000
--- a/3rdparty/gtest/src/gtest-all.cc
+++ /dev/null
@@ -1,48 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Google C++ Testing and Mocking Framework (Google Test)
-//
-// Sometimes it's desirable to build Google Test by compiling a single file.
-// This file serves this purpose.
-
-// This line ensures that gtest.h can be compiled on its own, even
-// when it's fused.
-#include "gtest/gtest.h"
-
-// The following lines pull in the real gtest *.cc files.
-#include "src/gtest.cc"
-#include "src/gtest-death-test.cc"
-#include "src/gtest-filepath.cc"
-#include "src/gtest-matchers.cc"
-#include "src/gtest-port.cc"
-#include "src/gtest-printers.cc"
-#include "src/gtest-test-part.cc"
-#include "src/gtest-typed-test.cc"
diff --git a/3rdparty/gtest/src/gtest-death-test.cc b/3rdparty/gtest/src/gtest-death-test.cc
deleted file mode 100644
index da09a1cf..00000000
--- a/3rdparty/gtest/src/gtest-death-test.cc
+++ /dev/null
@@ -1,1653 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This file implements death tests.
-
-#include "gtest/gtest-death-test.h"
-
-#include <utility>
-
-#include "gtest/internal/gtest-port.h"
-#include "gtest/internal/custom/gtest.h"
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_OS_MAC
-#  include <crt_externs.h>
-# endif  // GTEST_OS_MAC
-
-# include <errno.h>
-# include <fcntl.h>
-# include <limits.h>
-
-# if GTEST_OS_LINUX
-#  include <signal.h>
-# endif  // GTEST_OS_LINUX
-
-# include <stdarg.h>
-
-# if GTEST_OS_WINDOWS
-#  include <windows.h>
-# else
-#  include <sys/mman.h>
-#  include <sys/wait.h>
-# endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_QNX
-#  include <spawn.h>
-# endif  // GTEST_OS_QNX
-
-# if GTEST_OS_FUCHSIA
-#  include <lib/fdio/fd.h>
-#  include <lib/fdio/io.h>
-#  include <lib/fdio/spawn.h>
-#  include <lib/zx/channel.h>
-#  include <lib/zx/port.h>
-#  include <lib/zx/process.h>
-#  include <lib/zx/socket.h>
-#  include <zircon/processargs.h>
-#  include <zircon/syscalls.h>
-#  include <zircon/syscalls/policy.h>
-#  include <zircon/syscalls/port.h>
-# endif  // GTEST_OS_FUCHSIA
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-string.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-// Constants.
-
-// The default death test style.
-//
-// This is defined in internal/gtest-port.h as "fast", but can be overridden by
-// a definition in internal/custom/gtest-port.h. The recommended value, which is
-// used internally at Google, is "threadsafe".
-static const char kDefaultDeathTestStyle[] = GTEST_DEFAULT_DEATH_TEST_STYLE;
-
-GTEST_DEFINE_string_(
-    death_test_style,
-    internal::StringFromGTestEnv("death_test_style", kDefaultDeathTestStyle),
-    "Indicates how to run a death test in a forked child process: "
-    "\"threadsafe\" (child process re-executes the test binary "
-    "from the beginning, running only the specific death test) or "
-    "\"fast\" (child process runs the death test immediately "
-    "after forking).");
-
-GTEST_DEFINE_bool_(
-    death_test_use_fork,
-    internal::BoolFromGTestEnv("death_test_use_fork", false),
-    "Instructs to use fork()/_exit() instead of clone() in death tests. "
-    "Ignored and always uses fork() on POSIX systems where clone() is not "
-    "implemented. Useful when running under valgrind or similar tools if "
-    "those do not support clone(). Valgrind 3.3.1 will just fail if "
-    "it sees an unsupported combination of clone() flags. "
-    "It is not recommended to use this flag w/o valgrind though it will "
-    "work in 99% of the cases. Once valgrind is fixed, this flag will "
-    "most likely be removed.");
-
-namespace internal {
-GTEST_DEFINE_string_(
-    internal_run_death_test, "",
-    "Indicates the file, line number, temporal index of "
-    "the single death test to run, and a file descriptor to "
-    "which a success code may be sent, all separated by "
-    "the '|' characters.  This flag is specified if and only if the "
-    "current process is a sub-process launched for running a thread-safe "
-    "death test.  FOR INTERNAL USE ONLY.");
-}  // namespace internal
-
-#if GTEST_HAS_DEATH_TEST
-
-namespace internal {
-
-// Valid only for fast death tests. Indicates the code is running in the
-// child process of a fast style death test.
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-static bool g_in_fast_death_test_child = false;
-# endif
-
-// Returns a Boolean value indicating whether the caller is currently
-// executing in the context of the death test child process.  Tools such as
-// Valgrind heap checkers may need this to modify their behavior in death
-// tests.  IMPORTANT: This is an internal utility.  Using it may break the
-// implementation of death tests.  User code MUST NOT use it.
-bool InDeathTestChild() {
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  // On Windows and Fuchsia, death tests are thread-safe regardless of the value
-  // of the death_test_style flag.
-  return !GTEST_FLAG(internal_run_death_test).empty();
-
-# else
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe")
-    return !GTEST_FLAG(internal_run_death_test).empty();
-  else
-    return g_in_fast_death_test_child;
-#endif
-}
-
-}  // namespace internal
-
-// ExitedWithCode constructor.
-ExitedWithCode::ExitedWithCode(int exit_code) : exit_code_(exit_code) {
-}
-
-// ExitedWithCode function-call operator.
-bool ExitedWithCode::operator()(int exit_status) const {
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  return exit_status == exit_code_;
-
-# else
-
-  return WIFEXITED(exit_status) && WEXITSTATUS(exit_status) == exit_code_;
-
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-}
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// KilledBySignal constructor.
-KilledBySignal::KilledBySignal(int signum) : signum_(signum) {
-}
-
-// KilledBySignal function-call operator.
-bool KilledBySignal::operator()(int exit_status) const {
-#  if defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
-  {
-    bool result;
-    if (GTEST_KILLED_BY_SIGNAL_OVERRIDE_(signum_, exit_status, &result)) {
-      return result;
-    }
-  }
-#  endif  // defined(GTEST_KILLED_BY_SIGNAL_OVERRIDE_)
-  return WIFSIGNALED(exit_status) && WTERMSIG(exit_status) == signum_;
-}
-# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-
-namespace internal {
-
-// Utilities needed for death tests.
-
-// Generates a textual description of a given exit code, in the format
-// specified by wait(2).
-static std::string ExitSummary(int exit_code) {
-  Message m;
-
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  m << "Exited with exit status " << exit_code;
-
-# else
-
-  if (WIFEXITED(exit_code)) {
-    m << "Exited with exit status " << WEXITSTATUS(exit_code);
-  } else if (WIFSIGNALED(exit_code)) {
-    m << "Terminated by signal " << WTERMSIG(exit_code);
-  }
-#  ifdef WCOREDUMP
-  if (WCOREDUMP(exit_code)) {
-    m << " (core dumped)";
-  }
-#  endif
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-  return m.GetString();
-}
-
-// Returns true if exit_status describes a process that was terminated
-// by a signal, or exited normally with a nonzero exit code.
-bool ExitedUnsuccessfully(int exit_status) {
-  return !ExitedWithCode(0)(exit_status);
-}
-
-# if !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-// Generates a textual failure message when a death test finds more than
-// one thread running, or cannot determine the number of threads, prior
-// to executing the given statement.  It is the responsibility of the
-// caller not to pass a thread_count of 1.
-static std::string DeathTestThreadWarning(size_t thread_count) {
-  Message msg;
-  msg << "Death tests use fork(), which is unsafe particularly"
-      << " in a threaded context. For this test, " << GTEST_NAME_ << " ";
-  if (thread_count == 0) {
-    msg << "couldn't detect the number of threads.";
-  } else {
-    msg << "detected " << thread_count << " threads.";
-  }
-  msg << " See "
-         "https://github.com/google/googletest/blob/master/googletest/docs/"
-         "advanced.md#death-tests-and-threads"
-      << " for more explanation and suggested solutions, especially if"
-      << " this is the last message you see before your test times out.";
-  return msg.GetString();
-}
-# endif  // !GTEST_OS_WINDOWS && !GTEST_OS_FUCHSIA
-
-// Flag characters for reporting a death test that did not die.
-static const char kDeathTestLived = 'L';
-static const char kDeathTestReturned = 'R';
-static const char kDeathTestThrew = 'T';
-static const char kDeathTestInternalError = 'I';
-
-#if GTEST_OS_FUCHSIA
-
-// File descriptor used for the pipe in the child process.
-static const int kFuchsiaReadPipeFd = 3;
-
-#endif
-
-// An enumeration describing all of the possible ways that a death test can
-// conclude.  DIED means that the process died while executing the test
-// code; LIVED means that process lived beyond the end of the test code;
-// RETURNED means that the test statement attempted to execute a return
-// statement, which is not allowed; THREW means that the test statement
-// returned control by throwing an exception.  IN_PROGRESS means the test
-// has not yet concluded.
-enum DeathTestOutcome { IN_PROGRESS, DIED, LIVED, RETURNED, THREW };
-
-// Routine for aborting the program which is safe to call from an
-// exec-style death test child process, in which case the error
-// message is propagated back to the parent process.  Otherwise, the
-// message is simply printed to stderr.  In either case, the program
-// then exits with status 1.
-static void DeathTestAbort(const std::string& message) {
-  // On a POSIX system, this function may be called from a threadsafe-style
-  // death test child process, which operates on a very small stack.  Use
-  // the heap for any additional non-minuscule memory requirements.
-  const InternalRunDeathTestFlag* const flag =
-      GetUnitTestImpl()->internal_run_death_test_flag();
-  if (flag != nullptr) {
-    FILE* parent = posix::FDOpen(flag->write_fd(), "w");
-    fputc(kDeathTestInternalError, parent);
-    fprintf(parent, "%s", message.c_str());
-    fflush(parent);
-    _exit(1);
-  } else {
-    fprintf(stderr, "%s", message.c_str());
-    fflush(stderr);
-    posix::Abort();
-  }
-}
-
-// A replacement for CHECK that calls DeathTestAbort if the assertion
-// fails.
-# define GTEST_DEATH_TEST_CHECK_(expression) \
-  do { \
-    if (!::testing::internal::IsTrue(expression)) { \
-      DeathTestAbort( \
-          ::std::string("CHECK failed: File ") + __FILE__ +  ", line " \
-          + ::testing::internal::StreamableToString(__LINE__) + ": " \
-          + #expression); \
-    } \
-  } while (::testing::internal::AlwaysFalse())
-
-// This macro is similar to GTEST_DEATH_TEST_CHECK_, but it is meant for
-// evaluating any system call that fulfills two conditions: it must return
-// -1 on failure, and set errno to EINTR when it is interrupted and
-// should be tried again.  The macro expands to a loop that repeatedly
-// evaluates the expression as long as it evaluates to -1 and sets
-// errno to EINTR.  If the expression evaluates to -1 but errno is
-// something other than EINTR, DeathTestAbort is called.
-# define GTEST_DEATH_TEST_CHECK_SYSCALL_(expression) \
-  do { \
-    int gtest_retval; \
-    do { \
-      gtest_retval = (expression); \
-    } while (gtest_retval == -1 && errno == EINTR); \
-    if (gtest_retval == -1) { \
-      DeathTestAbort( \
-          ::std::string("CHECK failed: File ") + __FILE__ + ", line " \
-          + ::testing::internal::StreamableToString(__LINE__) + ": " \
-          + #expression + " != -1"); \
-    } \
-  } while (::testing::internal::AlwaysFalse())
-
-// Returns the message describing the last system error in errno.
-std::string GetLastErrnoDescription() {
-    return errno == 0 ? "" : posix::StrError(errno);
-}
-
-// This is called from a death test parent process to read a failure
-// message from the death test child process and log it with the FATAL
-// severity. On Windows, the message is read from a pipe handle. On other
-// platforms, it is read from a file descriptor.
-static void FailFromInternalError(int fd) {
-  Message error;
-  char buffer[256];
-  int num_read;
-
-  do {
-    while ((num_read = posix::Read(fd, buffer, 255)) > 0) {
-      buffer[num_read] = '\0';
-      error << buffer;
-    }
-  } while (num_read == -1 && errno == EINTR);
-
-  if (num_read == 0) {
-    GTEST_LOG_(FATAL) << error.GetString();
-  } else {
-    const int last_error = errno;
-    GTEST_LOG_(FATAL) << "Error while reading death test internal: "
-                      << GetLastErrnoDescription() << " [" << last_error << "]";
-  }
-}
-
-// Death test constructor.  Increments the running death test count
-// for the current test.
-DeathTest::DeathTest() {
-  TestInfo* const info = GetUnitTestImpl()->current_test_info();
-  if (info == nullptr) {
-    DeathTestAbort("Cannot run a death test outside of a TEST or "
-                   "TEST_F construct");
-  }
-}
-
-// Creates and returns a death test by dispatching to the current
-// death test factory.
-bool DeathTest::Create(const char* statement,
-                       Matcher<const std::string&> matcher, const char* file,
-                       int line, DeathTest** test) {
-  return GetUnitTestImpl()->death_test_factory()->Create(
-      statement, std::move(matcher), file, line, test);
-}
-
-const char* DeathTest::LastMessage() {
-  return last_death_test_message_.c_str();
-}
-
-void DeathTest::set_last_death_test_message(const std::string& message) {
-  last_death_test_message_ = message;
-}
-
-std::string DeathTest::last_death_test_message_;
-
-// Provides cross platform implementation for some death functionality.
-class DeathTestImpl : public DeathTest {
- protected:
-  DeathTestImpl(const char* a_statement, Matcher<const std::string&> matcher)
-      : statement_(a_statement),
-        matcher_(std::move(matcher)),
-        spawned_(false),
-        status_(-1),
-        outcome_(IN_PROGRESS),
-        read_fd_(-1),
-        write_fd_(-1) {}
-
-  // read_fd_ is expected to be closed and cleared by a derived class.
-  ~DeathTestImpl() override { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }
-
-  void Abort(AbortReason reason) override;
-  bool Passed(bool status_ok) override;
-
-  const char* statement() const { return statement_; }
-  bool spawned() const { return spawned_; }
-  void set_spawned(bool is_spawned) { spawned_ = is_spawned; }
-  int status() const { return status_; }
-  void set_status(int a_status) { status_ = a_status; }
-  DeathTestOutcome outcome() const { return outcome_; }
-  void set_outcome(DeathTestOutcome an_outcome) { outcome_ = an_outcome; }
-  int read_fd() const { return read_fd_; }
-  void set_read_fd(int fd) { read_fd_ = fd; }
-  int write_fd() const { return write_fd_; }
-  void set_write_fd(int fd) { write_fd_ = fd; }
-
-  // Called in the parent process only. Reads the result code of the death
-  // test child process via a pipe, interprets it to set the outcome_
-  // member, and closes read_fd_.  Outputs diagnostics and terminates in
-  // case of unexpected codes.
-  void ReadAndInterpretStatusByte();
-
-  // Returns stderr output from the child process.
-  virtual std::string GetErrorLogs();
-
- private:
-  // The textual content of the code this object is testing.  This class
-  // doesn't own this string and should not attempt to delete it.
-  const char* const statement_;
-  // A matcher that's expected to match the stderr output by the child process.
-  Matcher<const std::string&> matcher_;
-  // True if the death test child process has been successfully spawned.
-  bool spawned_;
-  // The exit status of the child process.
-  int status_;
-  // How the death test concluded.
-  DeathTestOutcome outcome_;
-  // Descriptor to the read end of the pipe to the child process.  It is
-  // always -1 in the child process.  The child keeps its write end of the
-  // pipe in write_fd_.
-  int read_fd_;
-  // Descriptor to the child's write end of the pipe to the parent process.
-  // It is always -1 in the parent process.  The parent keeps its end of the
-  // pipe in read_fd_.
-  int write_fd_;
-};
-
-// Called in the parent process only. Reads the result code of the death
-// test child process via a pipe, interprets it to set the outcome_
-// member, and closes read_fd_.  Outputs diagnostics and terminates in
-// case of unexpected codes.
-void DeathTestImpl::ReadAndInterpretStatusByte() {
-  char flag;
-  int bytes_read;
-
-  // The read() here blocks until data is available (signifying the
-  // failure of the death test) or until the pipe is closed (signifying
-  // its success), so it's okay to call this in the parent before
-  // the child process has exited.
-  do {
-    bytes_read = posix::Read(read_fd(), &flag, 1);
-  } while (bytes_read == -1 && errno == EINTR);
-
-  if (bytes_read == 0) {
-    set_outcome(DIED);
-  } else if (bytes_read == 1) {
-    switch (flag) {
-      case kDeathTestReturned:
-        set_outcome(RETURNED);
-        break;
-      case kDeathTestThrew:
-        set_outcome(THREW);
-        break;
-      case kDeathTestLived:
-        set_outcome(LIVED);
-        break;
-      case kDeathTestInternalError:
-        FailFromInternalError(read_fd());  // Does not return.
-        break;
-      default:
-        GTEST_LOG_(FATAL) << "Death test child process reported "
-                          << "unexpected status byte ("
-                          << static_cast<unsigned int>(flag) << ")";
-    }
-  } else {
-    GTEST_LOG_(FATAL) << "Read from death test child process failed: "
-                      << GetLastErrnoDescription();
-  }
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Close(read_fd()));
-  set_read_fd(-1);
-}
-
-std::string DeathTestImpl::GetErrorLogs() {
-  return GetCapturedStderr();
-}
-
-// Signals that the death test code which should have exited, didn't.
-// Should be called only in a death test child process.
-// Writes a status byte to the child's status file descriptor, then
-// calls _exit(1).
-void DeathTestImpl::Abort(AbortReason reason) {
-  // The parent process considers the death test to be a failure if
-  // it finds any data in our pipe.  So, here we write a single flag byte
-  // to the pipe, then exit.
-  const char status_ch =
-      reason == TEST_DID_NOT_DIE ? kDeathTestLived :
-      reason == TEST_THREW_EXCEPTION ? kDeathTestThrew : kDeathTestReturned;
-
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(posix::Write(write_fd(), &status_ch, 1));
-  // We are leaking the descriptor here because on some platforms (i.e.,
-  // when built as Windows DLL), destructors of global objects will still
-  // run after calling _exit(). On such systems, write_fd_ will be
-  // indirectly closed from the destructor of UnitTestImpl, causing double
-  // close if it is also closed here. On debug configurations, double close
-  // may assert. As there are no in-process buffers to flush here, we are
-  // relying on the OS to close the descriptor after the process terminates
-  // when the destructors are not run.
-  _exit(1);  // Exits w/o any normal exit hooks (we were supposed to crash)
-}
-
-// Returns an indented copy of stderr output for a death test.
-// This makes distinguishing death test output lines from regular log lines
-// much easier.
-static ::std::string FormatDeathTestOutput(const ::std::string& output) {
-  ::std::string ret;
-  for (size_t at = 0; ; ) {
-    const size_t line_end = output.find('\n', at);
-    ret += "[  DEATH   ] ";
-    if (line_end == ::std::string::npos) {
-      ret += output.substr(at);
-      break;
-    }
-    ret += output.substr(at, line_end + 1 - at);
-    at = line_end + 1;
-  }
-  return ret;
-}
-
-// Assesses the success or failure of a death test, using both private
-// members which have previously been set, and one argument:
-//
-// Private data members:
-//   outcome:  An enumeration describing how the death test
-//             concluded: DIED, LIVED, THREW, or RETURNED.  The death test
-//             fails in the latter three cases.
-//   status:   The exit status of the child process. On *nix, it is in the
-//             in the format specified by wait(2). On Windows, this is the
-//             value supplied to the ExitProcess() API or a numeric code
-//             of the exception that terminated the program.
-//   matcher_: A matcher that's expected to match the stderr output by the child
-//             process.
-//
-// Argument:
-//   status_ok: true if exit_status is acceptable in the context of
-//              this particular death test, which fails if it is false
-//
-// Returns true if and only if all of the above conditions are met.  Otherwise,
-// the first failing condition, in the order given above, is the one that is
-// reported. Also sets the last death test message string.
-bool DeathTestImpl::Passed(bool status_ok) {
-  if (!spawned())
-    return false;
-
-  const std::string error_message = GetErrorLogs();
-
-  bool success = false;
-  Message buffer;
-
-  buffer << "Death test: " << statement() << "\n";
-  switch (outcome()) {
-    case LIVED:
-      buffer << "    Result: failed to die.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case THREW:
-      buffer << "    Result: threw an exception.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case RETURNED:
-      buffer << "    Result: illegal return in test statement.\n"
-             << " Error msg:\n" << FormatDeathTestOutput(error_message);
-      break;
-    case DIED:
-      if (status_ok) {
-        if (matcher_.Matches(error_message)) {
-          success = true;
-        } else {
-          std::ostringstream stream;
-          matcher_.DescribeTo(&stream);
-          buffer << "    Result: died but not with expected error.\n"
-                 << "  Expected: " << stream.str() << "\n"
-                 << "Actual msg:\n"
-                 << FormatDeathTestOutput(error_message);
-        }
-      } else {
-        buffer << "    Result: died but not with expected exit code:\n"
-               << "            " << ExitSummary(status()) << "\n"
-               << "Actual msg:\n" << FormatDeathTestOutput(error_message);
-      }
-      break;
-    case IN_PROGRESS:
-    default:
-      GTEST_LOG_(FATAL)
-          << "DeathTest::Passed somehow called before conclusion of test";
-  }
-
-  DeathTest::set_last_death_test_message(buffer.GetString());
-  return success;
-}
-
-# if GTEST_OS_WINDOWS
-// WindowsDeathTest implements death tests on Windows. Due to the
-// specifics of starting new processes on Windows, death tests there are
-// always threadsafe, and Google Test considers the
-// --gtest_death_test_style=fast setting to be equivalent to
-// --gtest_death_test_style=threadsafe there.
-//
-// A few implementation notes:  Like the Linux version, the Windows
-// implementation uses pipes for child-to-parent communication. But due to
-// the specifics of pipes on Windows, some extra steps are required:
-//
-// 1. The parent creates a communication pipe and stores handles to both
-//    ends of it.
-// 2. The parent starts the child and provides it with the information
-//    necessary to acquire the handle to the write end of the pipe.
-// 3. The child acquires the write end of the pipe and signals the parent
-//    using a Windows event.
-// 4. Now the parent can release the write end of the pipe on its side. If
-//    this is done before step 3, the object's reference count goes down to
-//    0 and it is destroyed, preventing the child from acquiring it. The
-//    parent now has to release it, or read operations on the read end of
-//    the pipe will not return when the child terminates.
-// 5. The parent reads child's output through the pipe (outcome code and
-//    any possible error messages) from the pipe, and its stderr and then
-//    determines whether to fail the test.
-//
-// Note: to distinguish Win32 API calls from the local method and function
-// calls, the former are explicitly resolved in the global namespace.
-//
-class WindowsDeathTest : public DeathTestImpl {
- public:
-  WindowsDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                   const char* file, int line)
-      : DeathTestImpl(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-
-  // All of these virtual functions are inherited from DeathTest.
-  virtual int Wait();
-  virtual TestRole AssumeRole();
-
- private:
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-  // Handle to the write end of the pipe to the child process.
-  AutoHandle write_handle_;
-  // Child process handle.
-  AutoHandle child_handle_;
-  // Event the child process uses to signal the parent that it has
-  // acquired the handle to the write end of the pipe. After seeing this
-  // event the parent can release its own handles to make sure its
-  // ReadFile() calls return when the child terminates.
-  AutoHandle event_handle_;
-};
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int WindowsDeathTest::Wait() {
-  if (!spawned())
-    return 0;
-
-  // Wait until the child either signals that it has acquired the write end
-  // of the pipe or it dies.
-  const HANDLE wait_handles[2] = { child_handle_.Get(), event_handle_.Get() };
-  switch (::WaitForMultipleObjects(2,
-                                   wait_handles,
-                                   FALSE,  // Waits for any of the handles.
-                                   INFINITE)) {
-    case WAIT_OBJECT_0:
-    case WAIT_OBJECT_0 + 1:
-      break;
-    default:
-      GTEST_DEATH_TEST_CHECK_(false);  // Should not get here.
-  }
-
-  // The child has acquired the write end of the pipe or exited.
-  // We release the handle on our side and continue.
-  write_handle_.Reset();
-  event_handle_.Reset();
-
-  ReadAndInterpretStatusByte();
-
-  // Waits for the child process to exit if it haven't already. This
-  // returns immediately if the child has already exited, regardless of
-  // whether previous calls to WaitForMultipleObjects synchronized on this
-  // handle or not.
-  GTEST_DEATH_TEST_CHECK_(
-      WAIT_OBJECT_0 == ::WaitForSingleObject(child_handle_.Get(),
-                                             INFINITE));
-  DWORD status_code;
-  GTEST_DEATH_TEST_CHECK_(
-      ::GetExitCodeProcess(child_handle_.Get(), &status_code) != FALSE);
-  child_handle_.Reset();
-  set_status(static_cast<int>(status_code));
-  return status();
-}
-
-// The AssumeRole process for a Windows death test.  It creates a child
-// process with the same executable as the current process to run the
-// death test.  The child process is given the --gtest_filter and
-// --gtest_internal_run_death_test flags such that it knows to run the
-// current death test only.
-DeathTest::TestRole WindowsDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    // ParseInternalRunDeathTestFlag() has performed all the necessary
-    // processing.
-    set_write_fd(flag->write_fd());
-    return EXECUTE_TEST;
-  }
-
-  // WindowsDeathTest uses an anonymous pipe to communicate results of
-  // a death test.
-  SECURITY_ATTRIBUTES handles_are_inheritable = {sizeof(SECURITY_ATTRIBUTES),
-                                                 nullptr, TRUE};
-  HANDLE read_handle, write_handle;
-  GTEST_DEATH_TEST_CHECK_(
-      ::CreatePipe(&read_handle, &write_handle, &handles_are_inheritable,
-                   0)  // Default buffer size.
-      != FALSE);
-  set_read_fd(::_open_osfhandle(reinterpret_cast<intptr_t>(read_handle),
-                                O_RDONLY));
-  write_handle_.Reset(write_handle);
-  event_handle_.Reset(::CreateEvent(
-      &handles_are_inheritable,
-      TRUE,       // The event will automatically reset to non-signaled state.
-      FALSE,      // The initial state is non-signalled.
-      nullptr));  // The even is unnamed.
-  GTEST_DEATH_TEST_CHECK_(event_handle_.Get() != nullptr);
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag +
-      "=" + file_ + "|" + StreamableToString(line_) + "|" +
-      StreamableToString(death_test_index) + "|" +
-      StreamableToString(static_cast<unsigned int>(::GetCurrentProcessId())) +
-      // size_t has the same width as pointers on both 32-bit and 64-bit
-      // Windows platforms.
-      // See http://msdn.microsoft.com/en-us/library/tcxf1dw6.aspx.
-      "|" + StreamableToString(reinterpret_cast<size_t>(write_handle)) +
-      "|" + StreamableToString(reinterpret_cast<size_t>(event_handle_.Get()));
-
-  char executable_path[_MAX_PATH + 1];  // NOLINT
-  GTEST_DEATH_TEST_CHECK_(_MAX_PATH + 1 != ::GetModuleFileNameA(nullptr,
-                                                                executable_path,
-                                                                _MAX_PATH));
-
-  std::string command_line =
-      std::string(::GetCommandLineA()) + " " + filter_flag + " \"" +
-      internal_flag + "\"";
-
-  DeathTest::set_last_death_test_message("");
-
-  CaptureStderr();
-  // Flush the log buffers since the log streams are shared with the child.
-  FlushInfoLog();
-
-  // The child process will share the standard handles with the parent.
-  STARTUPINFOA startup_info;
-  memset(&startup_info, 0, sizeof(STARTUPINFO));
-  startup_info.dwFlags = STARTF_USESTDHANDLES;
-  startup_info.hStdInput = ::GetStdHandle(STD_INPUT_HANDLE);
-  startup_info.hStdOutput = ::GetStdHandle(STD_OUTPUT_HANDLE);
-  startup_info.hStdError = ::GetStdHandle(STD_ERROR_HANDLE);
-
-  PROCESS_INFORMATION process_info;
-  GTEST_DEATH_TEST_CHECK_(
-      ::CreateProcessA(
-          executable_path, const_cast<char*>(command_line.c_str()),
-          nullptr,  // Retuned process handle is not inheritable.
-          nullptr,  // Retuned thread handle is not inheritable.
-          TRUE,  // Child inherits all inheritable handles (for write_handle_).
-          0x0,   // Default creation flags.
-          nullptr,  // Inherit the parent's environment.
-          UnitTest::GetInstance()->original_working_dir(), &startup_info,
-          &process_info) != FALSE);
-  child_handle_.Reset(process_info.hProcess);
-  ::CloseHandle(process_info.hThread);
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-# elif GTEST_OS_FUCHSIA
-
-class FuchsiaDeathTest : public DeathTestImpl {
- public:
-  FuchsiaDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                   const char* file, int line)
-      : DeathTestImpl(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-
-  // All of these virtual functions are inherited from DeathTest.
-  int Wait() override;
-  TestRole AssumeRole() override;
-  std::string GetErrorLogs() override;
-
- private:
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-  // The stderr data captured by the child process.
-  std::string captured_stderr_;
-
-  zx::process child_process_;
-  zx::channel exception_channel_;
-  zx::socket stderr_socket_;
-};
-
-// Utility class for accumulating command-line arguments.
-class Arguments {
- public:
-  Arguments() { args_.push_back(nullptr); }
-
-  ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
-         ++i) {
-      free(*i);
-    }
-  }
-  void AddArgument(const char* argument) {
-    args_.insert(args_.end() - 1, posix::StrDup(argument));
-  }
-
-  template <typename Str>
-  void AddArguments(const ::std::vector<Str>& arguments) {
-    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
-         i != arguments.end();
-         ++i) {
-      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
-    }
-  }
-  char* const* Argv() {
-    return &args_[0];
-  }
-
-  int size() {
-    return args_.size() - 1;
-  }
-
- private:
-  std::vector<char*> args_;
-};
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int FuchsiaDeathTest::Wait() {
-  const int kProcessKey = 0;
-  const int kSocketKey = 1;
-  const int kExceptionKey = 2;
-
-  if (!spawned())
-    return 0;
-
-  // Create a port to wait for socket/task/exception events.
-  zx_status_t status_zx;
-  zx::port port;
-  status_zx = zx::port::create(0, &port);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for the child process to terminate.
-  status_zx = child_process_.wait_async(
-      port, kProcessKey, ZX_PROCESS_TERMINATED, ZX_WAIT_ASYNC_ONCE);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for the socket to be readable or closed.
-  status_zx = stderr_socket_.wait_async(
-      port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED,
-      ZX_WAIT_ASYNC_ONCE);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  // Register to wait for an exception.
-  status_zx = exception_channel_.wait_async(
-      port, kExceptionKey, ZX_CHANNEL_READABLE, ZX_WAIT_ASYNC_ONCE);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  bool process_terminated = false;
-  bool socket_closed = false;
-  do {
-    zx_port_packet_t packet = {};
-    status_zx = port.wait(zx::time::infinite(), &packet);
-    GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-    if (packet.key == kExceptionKey) {
-      // Process encountered an exception. Kill it directly rather than
-      // letting other handlers process the event. We will get a kProcessKey
-      // event when the process actually terminates.
-      status_zx = child_process_.kill();
-      GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-    } else if (packet.key == kProcessKey) {
-      // Process terminated.
-      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
-      GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_PROCESS_TERMINATED);
-      process_terminated = true;
-    } else if (packet.key == kSocketKey) {
-      GTEST_DEATH_TEST_CHECK_(ZX_PKT_IS_SIGNAL_ONE(packet.type));
-      if (packet.signal.observed & ZX_SOCKET_READABLE) {
-        // Read data from the socket.
-        constexpr size_t kBufferSize = 1024;
-        do {
-          size_t old_length = captured_stderr_.length();
-          size_t bytes_read = 0;
-          captured_stderr_.resize(old_length + kBufferSize);
-          status_zx = stderr_socket_.read(
-              0, &captured_stderr_.front() + old_length, kBufferSize,
-              &bytes_read);
-          captured_stderr_.resize(old_length + bytes_read);
-        } while (status_zx == ZX_OK);
-        if (status_zx == ZX_ERR_PEER_CLOSED) {
-          socket_closed = true;
-        } else {
-          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_ERR_SHOULD_WAIT);
-          status_zx = stderr_socket_.wait_async(
-              port, kSocketKey, ZX_SOCKET_READABLE | ZX_SOCKET_PEER_CLOSED,
-              ZX_WAIT_ASYNC_ONCE);
-          GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-        }
-      } else {
-        GTEST_DEATH_TEST_CHECK_(packet.signal.observed & ZX_SOCKET_PEER_CLOSED);
-        socket_closed = true;
-      }
-    }
-  } while (!process_terminated && !socket_closed);
-
-  ReadAndInterpretStatusByte();
-
-  zx_info_process_t buffer;
-  status_zx = child_process_.get_info(
-      ZX_INFO_PROCESS, &buffer, sizeof(buffer), nullptr, nullptr);
-  GTEST_DEATH_TEST_CHECK_(status_zx == ZX_OK);
-
-  GTEST_DEATH_TEST_CHECK_(buffer.exited);
-  set_status(buffer.return_code);
-  return status();
-}
-
-// The AssumeRole process for a Fuchsia death test.  It creates a child
-// process with the same executable as the current process to run the
-// death test.  The child process is given the --gtest_filter and
-// --gtest_internal_run_death_test flags such that it knows to run the
-// current death test only.
-DeathTest::TestRole FuchsiaDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    // ParseInternalRunDeathTestFlag() has performed all the necessary
-    // processing.
-    set_write_fd(kFuchsiaReadPipeFd);
-    return EXECUTE_TEST;
-  }
-
-  // Flush the log buffers since the log streams are shared with the child.
-  FlushInfoLog();
-
-  // Build the child process command line.
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
-      + file_ + "|"
-      + StreamableToString(line_) + "|"
-      + StreamableToString(death_test_index);
-  Arguments args;
-  args.AddArguments(GetInjectableArgvs());
-  args.AddArgument(filter_flag.c_str());
-  args.AddArgument(internal_flag.c_str());
-
-  // Build the pipe for communication with the child.
-  zx_status_t status;
-  zx_handle_t child_pipe_handle;
-  int child_pipe_fd;
-  status = fdio_pipe_half(&child_pipe_fd, &child_pipe_handle);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-  set_read_fd(child_pipe_fd);
-
-  // Set the pipe handle for the child.
-  fdio_spawn_action_t spawn_actions[2] = {};
-  fdio_spawn_action_t* add_handle_action = &spawn_actions[0];
-  add_handle_action->action = FDIO_SPAWN_ACTION_ADD_HANDLE;
-  add_handle_action->h.id = PA_HND(PA_FD, kFuchsiaReadPipeFd);
-  add_handle_action->h.handle = child_pipe_handle;
-
-  // Create a socket pair will be used to receive the child process' stderr.
-  zx::socket stderr_producer_socket;
-  status =
-      zx::socket::create(0, &stderr_producer_socket, &stderr_socket_);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-  int stderr_producer_fd = -1;
-  status =
-      fdio_fd_create(stderr_producer_socket.release(), &stderr_producer_fd);
-  GTEST_DEATH_TEST_CHECK_(status >= 0);
-
-  // Make the stderr socket nonblocking.
-  GTEST_DEATH_TEST_CHECK_(fcntl(stderr_producer_fd, F_SETFL, 0) == 0);
-
-  fdio_spawn_action_t* add_stderr_action = &spawn_actions[1];
-  add_stderr_action->action = FDIO_SPAWN_ACTION_CLONE_FD;
-  add_stderr_action->fd.local_fd = stderr_producer_fd;
-  add_stderr_action->fd.target_fd = STDERR_FILENO;
-
-  // Create a child job.
-  zx_handle_t child_job = ZX_HANDLE_INVALID;
-  status = zx_job_create(zx_job_default(), 0, & child_job);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-  zx_policy_basic_t policy;
-  policy.condition = ZX_POL_NEW_ANY;
-  policy.policy = ZX_POL_ACTION_ALLOW;
-  status = zx_job_set_policy(
-      child_job, ZX_JOB_POL_RELATIVE, ZX_JOB_POL_BASIC, &policy, 1);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  // Create an exception channel attached to the |child_job|, to allow
-  // us to suppress the system default exception handler from firing.
-  status =
-      zx_task_create_exception_channel(
-          child_job, 0, exception_channel_.reset_and_get_address());
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  // Spawn the child process.
-  status = fdio_spawn_etc(
-      child_job, FDIO_SPAWN_CLONE_ALL, args.Argv()[0], args.Argv(), nullptr,
-      2, spawn_actions, child_process_.reset_and_get_address(), nullptr);
-  GTEST_DEATH_TEST_CHECK_(status == ZX_OK);
-
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-std::string FuchsiaDeathTest::GetErrorLogs() {
-  return captured_stderr_;
-}
-
-#else  // We are neither on Windows, nor on Fuchsia.
-
-// ForkingDeathTest provides implementations for most of the abstract
-// methods of the DeathTest interface.  Only the AssumeRole method is
-// left undefined.
-class ForkingDeathTest : public DeathTestImpl {
- public:
-  ForkingDeathTest(const char* statement, Matcher<const std::string&> matcher);
-
-  // All of these virtual functions are inherited from DeathTest.
-  int Wait() override;
-
- protected:
-  void set_child_pid(pid_t child_pid) { child_pid_ = child_pid; }
-
- private:
-  // PID of child process during death test; 0 in the child process itself.
-  pid_t child_pid_;
-};
-
-// Constructs a ForkingDeathTest.
-ForkingDeathTest::ForkingDeathTest(const char* a_statement,
-                                   Matcher<const std::string&> matcher)
-    : DeathTestImpl(a_statement, std::move(matcher)), child_pid_(-1) {}
-
-// Waits for the child in a death test to exit, returning its exit
-// status, or 0 if no child process exists.  As a side effect, sets the
-// outcome data member.
-int ForkingDeathTest::Wait() {
-  if (!spawned())
-    return 0;
-
-  ReadAndInterpretStatusByte();
-
-  int status_value;
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(waitpid(child_pid_, &status_value, 0));
-  set_status(status_value);
-  return status_value;
-}
-
-// A concrete death test class that forks, then immediately runs the test
-// in the child process.
-class NoExecDeathTest : public ForkingDeathTest {
- public:
-  NoExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher)
-      : ForkingDeathTest(a_statement, std::move(matcher)) {}
-  TestRole AssumeRole() override;
-};
-
-// The AssumeRole process for a fork-and-run death test.  It implements a
-// straightforward fork, with a simple pipe to transmit the status byte.
-DeathTest::TestRole NoExecDeathTest::AssumeRole() {
-  const size_t thread_count = GetThreadCount();
-  if (thread_count != 1) {
-    GTEST_LOG_(WARNING) << DeathTestThreadWarning(thread_count);
-  }
-
-  int pipe_fd[2];
-  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
-
-  DeathTest::set_last_death_test_message("");
-  CaptureStderr();
-  // When we fork the process below, the log file buffers are copied, but the
-  // file descriptors are shared.  We flush all log files here so that closing
-  // the file descriptors in the child process doesn't throw off the
-  // synchronization between descriptors and buffers in the parent process.
-  // This is as close to the fork as possible to avoid a race condition in case
-  // there are multiple threads running before the death test, and another
-  // thread writes to the log file.
-  FlushInfoLog();
-
-  const pid_t child_pid = fork();
-  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  set_child_pid(child_pid);
-  if (child_pid == 0) {
-    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[0]));
-    set_write_fd(pipe_fd[1]);
-    // Redirects all logging to stderr in the child process to prevent
-    // concurrent writes to the log files.  We capture stderr in the parent
-    // process and append the child process' output to a log.
-    LogToStderr();
-    // Event forwarding to the listeners of event listener API mush be shut
-    // down in death test subprocesses.
-    GetUnitTestImpl()->listeners()->SuppressEventForwarding();
-    g_in_fast_death_test_child = true;
-    return EXECUTE_TEST;
-  } else {
-    GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
-    set_read_fd(pipe_fd[0]);
-    set_spawned(true);
-    return OVERSEE_TEST;
-  }
-}
-
-// A concrete death test class that forks and re-executes the main
-// program from the beginning, with command-line flags set that cause
-// only this specific death test to be run.
-class ExecDeathTest : public ForkingDeathTest {
- public:
-  ExecDeathTest(const char* a_statement, Matcher<const std::string&> matcher,
-                const char* file, int line)
-      : ForkingDeathTest(a_statement, std::move(matcher)),
-        file_(file),
-        line_(line) {}
-  TestRole AssumeRole() override;
-
- private:
-  static ::std::vector<std::string> GetArgvsForDeathTestChildProcess() {
-    ::std::vector<std::string> args = GetInjectableArgvs();
-#  if defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
-    ::std::vector<std::string> extra_args =
-        GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_();
-    args.insert(args.end(), extra_args.begin(), extra_args.end());
-#  endif  // defined(GTEST_EXTRA_DEATH_TEST_COMMAND_LINE_ARGS_)
-    return args;
-  }
-  // The name of the file in which the death test is located.
-  const char* const file_;
-  // The line number on which the death test is located.
-  const int line_;
-};
-
-// Utility class for accumulating command-line arguments.
-class Arguments {
- public:
-  Arguments() { args_.push_back(nullptr); }
-
-  ~Arguments() {
-    for (std::vector<char*>::iterator i = args_.begin(); i != args_.end();
-         ++i) {
-      free(*i);
-    }
-  }
-  void AddArgument(const char* argument) {
-    args_.insert(args_.end() - 1, posix::StrDup(argument));
-  }
-
-  template <typename Str>
-  void AddArguments(const ::std::vector<Str>& arguments) {
-    for (typename ::std::vector<Str>::const_iterator i = arguments.begin();
-         i != arguments.end();
-         ++i) {
-      args_.insert(args_.end() - 1, posix::StrDup(i->c_str()));
-    }
-  }
-  char* const* Argv() {
-    return &args_[0];
-  }
-
- private:
-  std::vector<char*> args_;
-};
-
-// A struct that encompasses the arguments to the child process of a
-// threadsafe-style death test process.
-struct ExecDeathTestArgs {
-  char* const* argv;  // Command-line arguments for the child's call to exec
-  int close_fd;       // File descriptor to close; the read end of a pipe
-};
-
-#  if GTEST_OS_MAC
-inline char** GetEnviron() {
-  // When Google Test is built as a framework on MacOS X, the environ variable
-  // is unavailable. Apple's documentation (man environ) recommends using
-  // _NSGetEnviron() instead.
-  return *_NSGetEnviron();
-}
-#  else
-// Some POSIX platforms expect you to declare environ. extern "C" makes
-// it reside in the global namespace.
-extern "C" char** environ;
-inline char** GetEnviron() { return environ; }
-#  endif  // GTEST_OS_MAC
-
-#  if !GTEST_OS_QNX
-// The main function for a threadsafe-style death test child process.
-// This function is called in a clone()-ed process and thus must avoid
-// any potentially unsafe operations like malloc or libc functions.
-static int ExecDeathTestChildMain(void* child_arg) {
-  ExecDeathTestArgs* const args = static_cast<ExecDeathTestArgs*>(child_arg);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(args->close_fd));
-
-  // We need to execute the test program in the same environment where
-  // it was originally invoked.  Therefore we change to the original
-  // working directory first.
-  const char* const original_dir =
-      UnitTest::GetInstance()->original_working_dir();
-  // We can safely call chdir() as it's a direct system call.
-  if (chdir(original_dir) != 0) {
-    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
-                   GetLastErrnoDescription());
-    return EXIT_FAILURE;
-  }
-
-  // We can safely call execve() as it's a direct system call.  We
-  // cannot use execvp() as it's a libc function and thus potentially
-  // unsafe.  Since execve() doesn't search the PATH, the user must
-  // invoke the test program via a valid path that contains at least
-  // one path separator.
-  execve(args->argv[0], args->argv, GetEnviron());
-  DeathTestAbort(std::string("execve(") + args->argv[0] + ", ...) in " +
-                 original_dir + " failed: " +
-                 GetLastErrnoDescription());
-  return EXIT_FAILURE;
-}
-#  endif  // !GTEST_OS_QNX
-
-#  if GTEST_HAS_CLONE
-// Two utility routines that together determine the direction the stack
-// grows.
-// This could be accomplished more elegantly by a single recursive
-// function, but we want to guard against the unlikely possibility of
-// a smart compiler optimizing the recursion away.
-//
-// GTEST_NO_INLINE_ is required to prevent GCC 4.6 from inlining
-// StackLowerThanAddress into StackGrowsDown, which then doesn't give
-// correct answer.
-static void StackLowerThanAddress(const void* ptr,
-                                  bool* result) GTEST_NO_INLINE_;
-// HWAddressSanitizer add a random tag to the MSB of the local variable address,
-// making comparison result unpredictable.
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-static void StackLowerThanAddress(const void* ptr, bool* result) {
-  int dummy;
-  *result = (&dummy < ptr);
-}
-
-// Make sure AddressSanitizer does not tamper with the stack here.
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-static bool StackGrowsDown() {
-  int dummy;
-  bool result;
-  StackLowerThanAddress(&dummy, &result);
-  return result;
-}
-#  endif  // GTEST_HAS_CLONE
-
-// Spawns a child process with the same executable as the current process in
-// a thread-safe manner and instructs it to run the death test.  The
-// implementation uses fork(2) + exec.  On systems where clone(2) is
-// available, it is used instead, being slightly more thread-safe.  On QNX,
-// fork supports only single-threaded environments, so this function uses
-// spawn(2) there instead.  The function dies with an error message if
-// anything goes wrong.
-static pid_t ExecDeathTestSpawnChild(char* const* argv, int close_fd) {
-  ExecDeathTestArgs args = { argv, close_fd };
-  pid_t child_pid = -1;
-
-#  if GTEST_OS_QNX
-  // Obtains the current directory and sets it to be closed in the child
-  // process.
-  const int cwd_fd = open(".", O_RDONLY);
-  GTEST_DEATH_TEST_CHECK_(cwd_fd != -1);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(cwd_fd, F_SETFD, FD_CLOEXEC));
-  // We need to execute the test program in the same environment where
-  // it was originally invoked.  Therefore we change to the original
-  // working directory first.
-  const char* const original_dir =
-      UnitTest::GetInstance()->original_working_dir();
-  // We can safely call chdir() as it's a direct system call.
-  if (chdir(original_dir) != 0) {
-    DeathTestAbort(std::string("chdir(\"") + original_dir + "\") failed: " +
-                   GetLastErrnoDescription());
-    return EXIT_FAILURE;
-  }
-
-  int fd_flags;
-  // Set close_fd to be closed after spawn.
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fd_flags = fcntl(close_fd, F_GETFD));
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(fcntl(close_fd, F_SETFD,
-                                        fd_flags | FD_CLOEXEC));
-  struct inheritance inherit = {0};
-  // spawn is a system call.
-  child_pid =
-      spawn(args.argv[0], 0, nullptr, &inherit, args.argv, GetEnviron());
-  // Restores the current working directory.
-  GTEST_DEATH_TEST_CHECK_(fchdir(cwd_fd) != -1);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(cwd_fd));
-
-#  else   // GTEST_OS_QNX
-#   if GTEST_OS_LINUX
-  // When a SIGPROF signal is received while fork() or clone() are executing,
-  // the process may hang. To avoid this, we ignore SIGPROF here and re-enable
-  // it after the call to fork()/clone() is complete.
-  struct sigaction saved_sigprof_action;
-  struct sigaction ignore_sigprof_action;
-  memset(&ignore_sigprof_action, 0, sizeof(ignore_sigprof_action));
-  sigemptyset(&ignore_sigprof_action.sa_mask);
-  ignore_sigprof_action.sa_handler = SIG_IGN;
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(sigaction(
-      SIGPROF, &ignore_sigprof_action, &saved_sigprof_action));
-#   endif  // GTEST_OS_LINUX
-
-#   if GTEST_HAS_CLONE
-  const bool use_fork = GTEST_FLAG(death_test_use_fork);
-
-  if (!use_fork) {
-    static const bool stack_grows_down = StackGrowsDown();
-    const auto stack_size = static_cast<size_t>(getpagesize());
-    // MMAP_ANONYMOUS is not defined on Mac, so we use MAP_ANON instead.
-    void* const stack = mmap(nullptr, stack_size, PROT_READ | PROT_WRITE,
-                             MAP_ANON | MAP_PRIVATE, -1, 0);
-    GTEST_DEATH_TEST_CHECK_(stack != MAP_FAILED);
-
-    // Maximum stack alignment in bytes:  For a downward-growing stack, this
-    // amount is subtracted from size of the stack space to get an address
-    // that is within the stack space and is aligned on all systems we care
-    // about.  As far as I know there is no ABI with stack alignment greater
-    // than 64.  We assume stack and stack_size already have alignment of
-    // kMaxStackAlignment.
-    const size_t kMaxStackAlignment = 64;
-    void* const stack_top =
-        static_cast<char*>(stack) +
-            (stack_grows_down ? stack_size - kMaxStackAlignment : 0);
-    GTEST_DEATH_TEST_CHECK_(
-        static_cast<size_t>(stack_size) > kMaxStackAlignment &&
-        reinterpret_cast<uintptr_t>(stack_top) % kMaxStackAlignment == 0);
-
-    child_pid = clone(&ExecDeathTestChildMain, stack_top, SIGCHLD, &args);
-
-    GTEST_DEATH_TEST_CHECK_(munmap(stack, stack_size) != -1);
-  }
-#   else
-  const bool use_fork = true;
-#   endif  // GTEST_HAS_CLONE
-
-  if (use_fork && (child_pid = fork()) == 0) {
-      ExecDeathTestChildMain(&args);
-      _exit(0);
-  }
-#  endif  // GTEST_OS_QNX
-#  if GTEST_OS_LINUX
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(
-      sigaction(SIGPROF, &saved_sigprof_action, nullptr));
-#  endif  // GTEST_OS_LINUX
-
-  GTEST_DEATH_TEST_CHECK_(child_pid != -1);
-  return child_pid;
-}
-
-// The AssumeRole process for a fork-and-exec death test.  It re-executes the
-// main program from the beginning, setting the --gtest_filter
-// and --gtest_internal_run_death_test flags to cause only the current
-// death test to be re-run.
-DeathTest::TestRole ExecDeathTest::AssumeRole() {
-  const UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const TestInfo* const info = impl->current_test_info();
-  const int death_test_index = info->result()->death_test_count();
-
-  if (flag != nullptr) {
-    set_write_fd(flag->write_fd());
-    return EXECUTE_TEST;
-  }
-
-  int pipe_fd[2];
-  GTEST_DEATH_TEST_CHECK_(pipe(pipe_fd) != -1);
-  // Clear the close-on-exec flag on the write end of the pipe, lest
-  // it be closed when the child process does an exec:
-  GTEST_DEATH_TEST_CHECK_(fcntl(pipe_fd[1], F_SETFD, 0) != -1);
-
-  const std::string filter_flag = std::string("--") + GTEST_FLAG_PREFIX_ +
-                                  kFilterFlag + "=" + info->test_suite_name() +
-                                  "." + info->name();
-  const std::string internal_flag =
-      std::string("--") + GTEST_FLAG_PREFIX_ + kInternalRunDeathTestFlag + "="
-      + file_ + "|" + StreamableToString(line_) + "|"
-      + StreamableToString(death_test_index) + "|"
-      + StreamableToString(pipe_fd[1]);
-  Arguments args;
-  args.AddArguments(GetArgvsForDeathTestChildProcess());
-  args.AddArgument(filter_flag.c_str());
-  args.AddArgument(internal_flag.c_str());
-
-  DeathTest::set_last_death_test_message("");
-
-  CaptureStderr();
-  // See the comment in NoExecDeathTest::AssumeRole for why the next line
-  // is necessary.
-  FlushInfoLog();
-
-  const pid_t child_pid = ExecDeathTestSpawnChild(args.Argv(), pipe_fd[0]);
-  GTEST_DEATH_TEST_CHECK_SYSCALL_(close(pipe_fd[1]));
-  set_child_pid(child_pid);
-  set_read_fd(pipe_fd[0]);
-  set_spawned(true);
-  return OVERSEE_TEST;
-}
-
-# endif  // !GTEST_OS_WINDOWS
-
-// Creates a concrete DeathTest-derived class that depends on the
-// --gtest_death_test_style flag, and sets the pointer pointed to
-// by the "test" argument to its address.  If the test should be
-// skipped, sets that pointer to NULL.  Returns true, unless the
-// flag is set to an invalid value.
-bool DefaultDeathTestFactory::Create(const char* statement,
-                                     Matcher<const std::string&> matcher,
-                                     const char* file, int line,
-                                     DeathTest** test) {
-  UnitTestImpl* const impl = GetUnitTestImpl();
-  const InternalRunDeathTestFlag* const flag =
-      impl->internal_run_death_test_flag();
-  const int death_test_index = impl->current_test_info()
-      ->increment_death_test_count();
-
-  if (flag != nullptr) {
-    if (death_test_index > flag->index()) {
-      DeathTest::set_last_death_test_message(
-          "Death test count (" + StreamableToString(death_test_index)
-          + ") somehow exceeded expected maximum ("
-          + StreamableToString(flag->index()) + ")");
-      return false;
-    }
-
-    if (!(flag->file() == file && flag->line() == line &&
-          flag->index() == death_test_index)) {
-      *test = nullptr;
-      return true;
-    }
-  }
-
-# if GTEST_OS_WINDOWS
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
-      GTEST_FLAG(death_test_style) == "fast") {
-    *test = new WindowsDeathTest(statement, std::move(matcher), file, line);
-  }
-
-# elif GTEST_OS_FUCHSIA
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe" ||
-      GTEST_FLAG(death_test_style) == "fast") {
-    *test = new FuchsiaDeathTest(statement, std::move(matcher), file, line);
-  }
-
-# else
-
-  if (GTEST_FLAG(death_test_style) == "threadsafe") {
-    *test = new ExecDeathTest(statement, std::move(matcher), file, line);
-  } else if (GTEST_FLAG(death_test_style) == "fast") {
-    *test = new NoExecDeathTest(statement, std::move(matcher));
-  }
-
-# endif  // GTEST_OS_WINDOWS
-
-  else {  // NOLINT - this is more readable than unbalanced brackets inside #if.
-    DeathTest::set_last_death_test_message(
-        "Unknown death test style \"" + GTEST_FLAG(death_test_style)
-        + "\" encountered");
-    return false;
-  }
-
-  return true;
-}
-
-# if GTEST_OS_WINDOWS
-// Recreates the pipe and event handles from the provided parameters,
-// signals the event, and returns a file descriptor wrapped around the pipe
-// handle. This function is called in the child process only.
-static int GetStatusFileDescriptor(unsigned int parent_process_id,
-                            size_t write_handle_as_size_t,
-                            size_t event_handle_as_size_t) {
-  AutoHandle parent_process_handle(::OpenProcess(PROCESS_DUP_HANDLE,
-                                                   FALSE,  // Non-inheritable.
-                                                   parent_process_id));
-  if (parent_process_handle.Get() == INVALID_HANDLE_VALUE) {
-    DeathTestAbort("Unable to open parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  GTEST_CHECK_(sizeof(HANDLE) <= sizeof(size_t));
-
-  const HANDLE write_handle =
-      reinterpret_cast<HANDLE>(write_handle_as_size_t);
-  HANDLE dup_write_handle;
-
-  // The newly initialized handle is accessible only in the parent
-  // process. To obtain one accessible within the child, we need to use
-  // DuplicateHandle.
-  if (!::DuplicateHandle(parent_process_handle.Get(), write_handle,
-                         ::GetCurrentProcess(), &dup_write_handle,
-                         0x0,    // Requested privileges ignored since
-                                 // DUPLICATE_SAME_ACCESS is used.
-                         FALSE,  // Request non-inheritable handler.
-                         DUPLICATE_SAME_ACCESS)) {
-    DeathTestAbort("Unable to duplicate the pipe handle " +
-                   StreamableToString(write_handle_as_size_t) +
-                   " from the parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  const HANDLE event_handle = reinterpret_cast<HANDLE>(event_handle_as_size_t);
-  HANDLE dup_event_handle;
-
-  if (!::DuplicateHandle(parent_process_handle.Get(), event_handle,
-                         ::GetCurrentProcess(), &dup_event_handle,
-                         0x0,
-                         FALSE,
-                         DUPLICATE_SAME_ACCESS)) {
-    DeathTestAbort("Unable to duplicate the event handle " +
-                   StreamableToString(event_handle_as_size_t) +
-                   " from the parent process " +
-                   StreamableToString(parent_process_id));
-  }
-
-  const int write_fd =
-      ::_open_osfhandle(reinterpret_cast<intptr_t>(dup_write_handle), O_APPEND);
-  if (write_fd == -1) {
-    DeathTestAbort("Unable to convert pipe handle " +
-                   StreamableToString(write_handle_as_size_t) +
-                   " to a file descriptor");
-  }
-
-  // Signals the parent that the write end of the pipe has been acquired
-  // so the parent can release its own write end.
-  ::SetEvent(dup_event_handle);
-
-  return write_fd;
-}
-# endif  // GTEST_OS_WINDOWS
-
-// Returns a newly created InternalRunDeathTestFlag object with fields
-// initialized from the GTEST_FLAG(internal_run_death_test) flag if
-// the flag is specified; otherwise returns NULL.
-InternalRunDeathTestFlag* ParseInternalRunDeathTestFlag() {
-  if (GTEST_FLAG(internal_run_death_test) == "") return nullptr;
-
-  // GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we
-  // can use it here.
-  int line = -1;
-  int index = -1;
-  ::std::vector< ::std::string> fields;
-  SplitString(GTEST_FLAG(internal_run_death_test).c_str(), '|', &fields);
-  int write_fd = -1;
-
-# if GTEST_OS_WINDOWS
-
-  unsigned int parent_process_id = 0;
-  size_t write_handle_as_size_t = 0;
-  size_t event_handle_as_size_t = 0;
-
-  if (fields.size() != 6
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)
-      || !ParseNaturalNumber(fields[3], &parent_process_id)
-      || !ParseNaturalNumber(fields[4], &write_handle_as_size_t)
-      || !ParseNaturalNumber(fields[5], &event_handle_as_size_t)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: " +
-                   GTEST_FLAG(internal_run_death_test));
-  }
-  write_fd = GetStatusFileDescriptor(parent_process_id,
-                                     write_handle_as_size_t,
-                                     event_handle_as_size_t);
-
-# elif GTEST_OS_FUCHSIA
-
-  if (fields.size() != 3
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
-        + GTEST_FLAG(internal_run_death_test));
-  }
-
-# else
-
-  if (fields.size() != 4
-      || !ParseNaturalNumber(fields[1], &line)
-      || !ParseNaturalNumber(fields[2], &index)
-      || !ParseNaturalNumber(fields[3], &write_fd)) {
-    DeathTestAbort("Bad --gtest_internal_run_death_test flag: "
-        + GTEST_FLAG(internal_run_death_test));
-  }
-
-# endif  // GTEST_OS_WINDOWS
-
-  return new InternalRunDeathTestFlag(fields[0], line, index, write_fd);
-}
-
-}  // namespace internal
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-filepath.cc b/3rdparty/gtest/src/gtest-filepath.cc
deleted file mode 100644
index bd7b99ff..00000000
--- a/3rdparty/gtest/src/gtest-filepath.cc
+++ /dev/null
@@ -1,379 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "gtest/internal/gtest-filepath.h"
-
-#include <stdlib.h>
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-message.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>
-#elif GTEST_OS_WINDOWS
-# include <direct.h>
-# include <io.h>
-#else
-# include <limits.h>
-# include <climits>  // Some Linux distributions define PATH_MAX here.
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-#include "gtest/internal/gtest-string.h"
-
-#if GTEST_OS_WINDOWS
-# define GTEST_PATH_MAX_ _MAX_PATH
-#elif defined(PATH_MAX)
-# define GTEST_PATH_MAX_ PATH_MAX
-#elif defined(_XOPEN_PATH_MAX)
-# define GTEST_PATH_MAX_ _XOPEN_PATH_MAX
-#else
-# define GTEST_PATH_MAX_ _POSIX_PATH_MAX
-#endif  // GTEST_OS_WINDOWS
-
-namespace testing {
-namespace internal {
-
-#if GTEST_OS_WINDOWS
-// On Windows, '\\' is the standard path separator, but many tools and the
-// Windows API also accept '/' as an alternate path separator. Unless otherwise
-// noted, a file path can contain either kind of path separators, or a mixture
-// of them.
-const char kPathSeparator = '\\';
-const char kAlternatePathSeparator = '/';
-const char kAlternatePathSeparatorString[] = "/";
-# if GTEST_OS_WINDOWS_MOBILE
-// Windows CE doesn't have a current directory. You should not use
-// the current directory in tests on Windows CE, but this at least
-// provides a reasonable fallback.
-const char kCurrentDirectoryString[] = "\\";
-// Windows CE doesn't define INVALID_FILE_ATTRIBUTES
-const DWORD kInvalidFileAttributes = 0xffffffff;
-# else
-const char kCurrentDirectoryString[] = ".\\";
-# endif  // GTEST_OS_WINDOWS_MOBILE
-#else
-const char kPathSeparator = '/';
-const char kCurrentDirectoryString[] = "./";
-#endif  // GTEST_OS_WINDOWS
-
-// Returns whether the given character is a valid path separator.
-static bool IsPathSeparator(char c) {
-#if GTEST_HAS_ALT_PATH_SEP_
-  return (c == kPathSeparator) || (c == kAlternatePathSeparator);
-#else
-  return c == kPathSeparator;
-#endif
-}
-
-// Returns the current working directory, or "" if unsuccessful.
-FilePath FilePath::GetCurrentDir() {
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE || \
-    GTEST_OS_WINDOWS_RT || ARDUINO || defined(ESP_PLATFORM)
-  // These platforms do not have a current directory, so we just return
-  // something reasonable.
-  return FilePath(kCurrentDirectoryString);
-#elif GTEST_OS_WINDOWS
-  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  return FilePath(_getcwd(cwd, sizeof(cwd)) == nullptr ? "" : cwd);
-#else
-  char cwd[GTEST_PATH_MAX_ + 1] = { '\0' };
-  char* result = getcwd(cwd, sizeof(cwd));
-# if GTEST_OS_NACL
-  // getcwd will likely fail in NaCl due to the sandbox, so return something
-  // reasonable. The user may have provided a shim implementation for getcwd,
-  // however, so fallback only when failure is detected.
-  return FilePath(result == nullptr ? kCurrentDirectoryString : cwd);
-# endif  // GTEST_OS_NACL
-  return FilePath(result == nullptr ? "" : cwd);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Returns a copy of the FilePath with the case-insensitive extension removed.
-// Example: FilePath("dir/file.exe").RemoveExtension("EXE") returns
-// FilePath("dir/file"). If a case-insensitive extension is not
-// found, returns a copy of the original FilePath.
-FilePath FilePath::RemoveExtension(const char* extension) const {
-  const std::string dot_extension = std::string(".") + extension;
-  if (String::EndsWithCaseInsensitive(pathname_, dot_extension)) {
-    return FilePath(pathname_.substr(
-        0, pathname_.length() - dot_extension.length()));
-  }
-  return *this;
-}
-
-// Returns a pointer to the last occurrence of a valid path separator in
-// the FilePath. On Windows, for example, both '/' and '\' are valid path
-// separators. Returns NULL if no path separator was found.
-const char* FilePath::FindLastPathSeparator() const {
-  const char* const last_sep = strrchr(c_str(), kPathSeparator);
-#if GTEST_HAS_ALT_PATH_SEP_
-  const char* const last_alt_sep = strrchr(c_str(), kAlternatePathSeparator);
-  // Comparing two pointers of which only one is NULL is undefined.
-  if (last_alt_sep != nullptr &&
-      (last_sep == nullptr || last_alt_sep > last_sep)) {
-    return last_alt_sep;
-  }
-#endif
-  return last_sep;
-}
-
-// Returns a copy of the FilePath with the directory part removed.
-// Example: FilePath("path/to/file").RemoveDirectoryName() returns
-// FilePath("file"). If there is no directory part ("just_a_file"), it returns
-// the FilePath unmodified. If there is no file part ("just_a_dir/") it
-// returns an empty FilePath ("").
-// On Windows platform, '\' is the path separator, otherwise it is '/'.
-FilePath FilePath::RemoveDirectoryName() const {
-  const char* const last_sep = FindLastPathSeparator();
-  return last_sep ? FilePath(last_sep + 1) : *this;
-}
-
-// RemoveFileName returns the directory path with the filename removed.
-// Example: FilePath("path/to/file").RemoveFileName() returns "path/to/".
-// If the FilePath is "a_file" or "/a_file", RemoveFileName returns
-// FilePath("./") or, on Windows, FilePath(".\\"). If the filepath does
-// not have a file, like "just/a/dir/", it returns the FilePath unmodified.
-// On Windows platform, '\' is the path separator, otherwise it is '/'.
-FilePath FilePath::RemoveFileName() const {
-  const char* const last_sep = FindLastPathSeparator();
-  std::string dir;
-  if (last_sep) {
-    dir = std::string(c_str(), static_cast<size_t>(last_sep + 1 - c_str()));
-  } else {
-    dir = kCurrentDirectoryString;
-  }
-  return FilePath(dir);
-}
-
-// Helper functions for naming files in a directory for xml output.
-
-// Given directory = "dir", base_name = "test", number = 0,
-// extension = "xml", returns "dir/test.xml". If number is greater
-// than zero (e.g., 12), returns "dir/test_12.xml".
-// On Windows platform, uses \ as the separator rather than /.
-FilePath FilePath::MakeFileName(const FilePath& directory,
-                                const FilePath& base_name,
-                                int number,
-                                const char* extension) {
-  std::string file;
-  if (number == 0) {
-    file = base_name.string() + "." + extension;
-  } else {
-    file = base_name.string() + "_" + StreamableToString(number)
-        + "." + extension;
-  }
-  return ConcatPaths(directory, FilePath(file));
-}
-
-// Given directory = "dir", relative_path = "test.xml", returns "dir/test.xml".
-// On Windows, uses \ as the separator rather than /.
-FilePath FilePath::ConcatPaths(const FilePath& directory,
-                               const FilePath& relative_path) {
-  if (directory.IsEmpty())
-    return relative_path;
-  const FilePath dir(directory.RemoveTrailingPathSeparator());
-  return FilePath(dir.string() + kPathSeparator + relative_path.string());
-}
-
-// Returns true if pathname describes something findable in the file-system,
-// either a file, directory, or whatever.
-bool FilePath::FileOrDirectoryExists() const {
-#if GTEST_OS_WINDOWS_MOBILE
-  LPCWSTR unicode = String::AnsiToUtf16(pathname_.c_str());
-  const DWORD attributes = GetFileAttributes(unicode);
-  delete [] unicode;
-  return attributes != kInvalidFileAttributes;
-#else
-  posix::StatStruct file_stat;
-  return posix::Stat(pathname_.c_str(), &file_stat) == 0;
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Returns true if pathname describes a directory in the file-system
-// that exists.
-bool FilePath::DirectoryExists() const {
-  bool result = false;
-#if GTEST_OS_WINDOWS
-  // Don't strip off trailing separator if path is a root directory on
-  // Windows (like "C:\\").
-  const FilePath& path(IsRootDirectory() ? *this :
-                                           RemoveTrailingPathSeparator());
-#else
-  const FilePath& path(*this);
-#endif
-
-#if GTEST_OS_WINDOWS_MOBILE
-  LPCWSTR unicode = String::AnsiToUtf16(path.c_str());
-  const DWORD attributes = GetFileAttributes(unicode);
-  delete [] unicode;
-  if ((attributes != kInvalidFileAttributes) &&
-      (attributes & FILE_ATTRIBUTE_DIRECTORY)) {
-    result = true;
-  }
-#else
-  posix::StatStruct file_stat;
-  result = posix::Stat(path.c_str(), &file_stat) == 0 &&
-      posix::IsDir(file_stat);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-  return result;
-}
-
-// Returns true if pathname describes a root directory. (Windows has one
-// root directory per disk drive.)
-bool FilePath::IsRootDirectory() const {
-#if GTEST_OS_WINDOWS
-  return pathname_.length() == 3 && IsAbsolutePath();
-#else
-  return pathname_.length() == 1 && IsPathSeparator(pathname_.c_str()[0]);
-#endif
-}
-
-// Returns true if pathname describes an absolute path.
-bool FilePath::IsAbsolutePath() const {
-  const char* const name = pathname_.c_str();
-#if GTEST_OS_WINDOWS
-  return pathname_.length() >= 3 &&
-     ((name[0] >= 'a' && name[0] <= 'z') ||
-      (name[0] >= 'A' && name[0] <= 'Z')) &&
-     name[1] == ':' &&
-     IsPathSeparator(name[2]);
-#else
-  return IsPathSeparator(name[0]);
-#endif
-}
-
-// Returns a pathname for a file that does not currently exist. The pathname
-// will be directory/base_name.extension or
-// directory/base_name_<number>.extension if directory/base_name.extension
-// already exists. The number will be incremented until a pathname is found
-// that does not already exist.
-// Examples: 'dir/foo_test.xml' or 'dir/foo_test_1.xml'.
-// There could be a race condition if two or more processes are calling this
-// function at the same time -- they could both pick the same filename.
-FilePath FilePath::GenerateUniqueFileName(const FilePath& directory,
-                                          const FilePath& base_name,
-                                          const char* extension) {
-  FilePath full_pathname;
-  int number = 0;
-  do {
-    full_pathname.Set(MakeFileName(directory, base_name, number++, extension));
-  } while (full_pathname.FileOrDirectoryExists());
-  return full_pathname;
-}
-
-// Returns true if FilePath ends with a path separator, which indicates that
-// it is intended to represent a directory. Returns false otherwise.
-// This does NOT check that a directory (or file) actually exists.
-bool FilePath::IsDirectory() const {
-  return !pathname_.empty() &&
-         IsPathSeparator(pathname_.c_str()[pathname_.length() - 1]);
-}
-
-// Create directories so that path exists. Returns true if successful or if
-// the directories already exist; returns false if unable to create directories
-// for any reason.
-bool FilePath::CreateDirectoriesRecursively() const {
-  if (!this->IsDirectory()) {
-    return false;
-  }
-
-  if (pathname_.length() == 0 || this->DirectoryExists()) {
-    return true;
-  }
-
-  const FilePath parent(this->RemoveTrailingPathSeparator().RemoveFileName());
-  return parent.CreateDirectoriesRecursively() && this->CreateFolder();
-}
-
-// Create the directory so that path exists. Returns true if successful or
-// if the directory already exists; returns false if unable to create the
-// directory for any reason, including if the parent directory does not
-// exist. Not named "CreateDirectory" because that's a macro on Windows.
-bool FilePath::CreateFolder() const {
-#if GTEST_OS_WINDOWS_MOBILE
-  FilePath removed_sep(this->RemoveTrailingPathSeparator());
-  LPCWSTR unicode = String::AnsiToUtf16(removed_sep.c_str());
-  int result = CreateDirectory(unicode, nullptr) ? 0 : -1;
-  delete [] unicode;
-#elif GTEST_OS_WINDOWS
-  int result = _mkdir(pathname_.c_str());
-#else
-  int result = mkdir(pathname_.c_str(), 0777);
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-  if (result == -1) {
-    return this->DirectoryExists();  // An error is OK if the directory exists.
-  }
-  return true;  // No error.
-}
-
-// If input name has a trailing separator character, remove it and return the
-// name, otherwise return the name string unmodified.
-// On Windows platform, uses \ as the separator, other platforms use /.
-FilePath FilePath::RemoveTrailingPathSeparator() const {
-  return IsDirectory()
-      ? FilePath(pathname_.substr(0, pathname_.length() - 1))
-      : *this;
-}
-
-// Removes any redundant separators that might be in the pathname.
-// For example, "bar///foo" becomes "bar/foo". Does not eliminate other
-// redundancies that might be in a pathname involving "." or "..".
-void FilePath::Normalize() {
-  if (pathname_.c_str() == nullptr) {
-    pathname_ = "";
-    return;
-  }
-  const char* src = pathname_.c_str();
-  char* const dest = new char[pathname_.length() + 1];
-  char* dest_ptr = dest;
-  memset(dest_ptr, 0, pathname_.length() + 1);
-
-  while (*src != '\0') {
-    *dest_ptr = *src;
-    if (!IsPathSeparator(*src)) {
-      src++;
-    } else {
-#if GTEST_HAS_ALT_PATH_SEP_
-      if (*dest_ptr == kAlternatePathSeparator) {
-        *dest_ptr = kPathSeparator;
-      }
-#endif
-      while (IsPathSeparator(*src))
-        src++;
-    }
-    dest_ptr++;
-  }
-  *dest_ptr = '\0';
-  pathname_ = dest;
-  delete[] dest;
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-internal-inl.h b/3rdparty/gtest/src/gtest-internal-inl.h
deleted file mode 100644
index 8ed70daa..00000000
--- a/3rdparty/gtest/src/gtest-internal-inl.h
+++ /dev/null
@@ -1,1211 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Utility functions and classes used by the Google C++ testing framework.//
-// This file contains purely Google Test's internal implementation.  Please
-// DO NOT #INCLUDE IT IN A USER PROGRAM.
-
-#ifndef GTEST_SRC_GTEST_INTERNAL_INL_H_
-#define GTEST_SRC_GTEST_INTERNAL_INL_H_
-
-#ifndef _WIN32_WCE
-# include <errno.h>
-#endif  // !_WIN32_WCE
-#include <stddef.h>
-#include <stdlib.h>  // For strtoll/_strtoul64/malloc/free.
-#include <string.h>  // For memmove.
-
-#include <algorithm>
-#include <memory>
-#include <string>
-#include <vector>
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_CAN_STREAM_RESULTS_
-# include <arpa/inet.h>  // NOLINT
-# include <netdb.h>  // NOLINT
-#endif
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>  // NOLINT
-#endif  // GTEST_OS_WINDOWS
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4251 \
-/* class A needs to have dll-interface to be used by clients of class B */)
-
-namespace testing {
-
-// Declares the flags.
-//
-// We don't want the users to modify this flag in the code, but want
-// Google Test's own unit tests to be able to access it. Therefore we
-// declare it here as opposed to in gtest.h.
-GTEST_DECLARE_bool_(death_test_use_fork);
-
-namespace internal {
-
-// The value of GetTestTypeId() as seen from within the Google Test
-// library.  This is solely for testing GetTestTypeId().
-GTEST_API_ extern const TypeId kTestTypeIdInGoogleTest;
-
-// Names of the flags (needed for parsing Google Test flags).
-const char kAlsoRunDisabledTestsFlag[] = "also_run_disabled_tests";
-const char kBreakOnFailureFlag[] = "break_on_failure";
-const char kCatchExceptionsFlag[] = "catch_exceptions";
-const char kColorFlag[] = "color";
-const char kFilterFlag[] = "filter";
-const char kListTestsFlag[] = "list_tests";
-const char kOutputFlag[] = "output";
-const char kPrintTimeFlag[] = "print_time";
-const char kPrintUTF8Flag[] = "print_utf8";
-const char kRandomSeedFlag[] = "random_seed";
-const char kRepeatFlag[] = "repeat";
-const char kShuffleFlag[] = "shuffle";
-const char kStackTraceDepthFlag[] = "stack_trace_depth";
-const char kStreamResultToFlag[] = "stream_result_to";
-const char kThrowOnFailureFlag[] = "throw_on_failure";
-const char kFlagfileFlag[] = "flagfile";
-
-// A valid random seed must be in [1, kMaxRandomSeed].
-const int kMaxRandomSeed = 99999;
-
-// g_help_flag is true if and only if the --help flag or an equivalent form
-// is specified on the command line.
-GTEST_API_ extern bool g_help_flag;
-
-// Returns the current time in milliseconds.
-GTEST_API_ TimeInMillis GetTimeInMillis();
-
-// Returns true if and only if Google Test should use colors in the output.
-GTEST_API_ bool ShouldUseColor(bool stdout_is_tty);
-
-// Formats the given time in milliseconds as seconds.
-GTEST_API_ std::string FormatTimeInMillisAsSeconds(TimeInMillis ms);
-
-// Converts the given time in milliseconds to a date string in the ISO 8601
-// format, without the timezone information.  N.B.: due to the use the
-// non-reentrant localtime() function, this function is not thread safe.  Do
-// not use it in any code that can be called from multiple threads.
-GTEST_API_ std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms);
-
-// Parses a string for an Int32 flag, in the form of "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-GTEST_API_ bool ParseInt32Flag(
-    const char* str, const char* flag, Int32* value);
-
-// Returns a random seed in range [1, kMaxRandomSeed] based on the
-// given --gtest_random_seed flag value.
-inline int GetRandomSeedFromFlag(Int32 random_seed_flag) {
-  const unsigned int raw_seed = (random_seed_flag == 0) ?
-      static_cast<unsigned int>(GetTimeInMillis()) :
-      static_cast<unsigned int>(random_seed_flag);
-
-  // Normalizes the actual seed to range [1, kMaxRandomSeed] such that
-  // it's easy to type.
-  const int normalized_seed =
-      static_cast<int>((raw_seed - 1U) %
-                       static_cast<unsigned int>(kMaxRandomSeed)) + 1;
-  return normalized_seed;
-}
-
-// Returns the first valid random seed after 'seed'.  The behavior is
-// undefined if 'seed' is invalid.  The seed after kMaxRandomSeed is
-// considered to be 1.
-inline int GetNextRandomSeed(int seed) {
-  GTEST_CHECK_(1 <= seed && seed <= kMaxRandomSeed)
-      << "Invalid random seed " << seed << " - must be in [1, "
-      << kMaxRandomSeed << "].";
-  const int next_seed = seed + 1;
-  return (next_seed > kMaxRandomSeed) ? 1 : next_seed;
-}
-
-// This class saves the values of all Google Test flags in its c'tor, and
-// restores them in its d'tor.
-class GTestFlagSaver {
- public:
-  // The c'tor.
-  GTestFlagSaver() {
-    also_run_disabled_tests_ = GTEST_FLAG(also_run_disabled_tests);
-    break_on_failure_ = GTEST_FLAG(break_on_failure);
-    catch_exceptions_ = GTEST_FLAG(catch_exceptions);
-    color_ = GTEST_FLAG(color);
-    death_test_style_ = GTEST_FLAG(death_test_style);
-    death_test_use_fork_ = GTEST_FLAG(death_test_use_fork);
-    filter_ = GTEST_FLAG(filter);
-    internal_run_death_test_ = GTEST_FLAG(internal_run_death_test);
-    list_tests_ = GTEST_FLAG(list_tests);
-    output_ = GTEST_FLAG(output);
-    print_time_ = GTEST_FLAG(print_time);
-    print_utf8_ = GTEST_FLAG(print_utf8);
-    random_seed_ = GTEST_FLAG(random_seed);
-    repeat_ = GTEST_FLAG(repeat);
-    shuffle_ = GTEST_FLAG(shuffle);
-    stack_trace_depth_ = GTEST_FLAG(stack_trace_depth);
-    stream_result_to_ = GTEST_FLAG(stream_result_to);
-    throw_on_failure_ = GTEST_FLAG(throw_on_failure);
-  }
-
-  // The d'tor is not virtual.  DO NOT INHERIT FROM THIS CLASS.
-  ~GTestFlagSaver() {
-    GTEST_FLAG(also_run_disabled_tests) = also_run_disabled_tests_;
-    GTEST_FLAG(break_on_failure) = break_on_failure_;
-    GTEST_FLAG(catch_exceptions) = catch_exceptions_;
-    GTEST_FLAG(color) = color_;
-    GTEST_FLAG(death_test_style) = death_test_style_;
-    GTEST_FLAG(death_test_use_fork) = death_test_use_fork_;
-    GTEST_FLAG(filter) = filter_;
-    GTEST_FLAG(internal_run_death_test) = internal_run_death_test_;
-    GTEST_FLAG(list_tests) = list_tests_;
-    GTEST_FLAG(output) = output_;
-    GTEST_FLAG(print_time) = print_time_;
-    GTEST_FLAG(print_utf8) = print_utf8_;
-    GTEST_FLAG(random_seed) = random_seed_;
-    GTEST_FLAG(repeat) = repeat_;
-    GTEST_FLAG(shuffle) = shuffle_;
-    GTEST_FLAG(stack_trace_depth) = stack_trace_depth_;
-    GTEST_FLAG(stream_result_to) = stream_result_to_;
-    GTEST_FLAG(throw_on_failure) = throw_on_failure_;
-  }
-
- private:
-  // Fields for saving the original values of flags.
-  bool also_run_disabled_tests_;
-  bool break_on_failure_;
-  bool catch_exceptions_;
-  std::string color_;
-  std::string death_test_style_;
-  bool death_test_use_fork_;
-  std::string filter_;
-  std::string internal_run_death_test_;
-  bool list_tests_;
-  std::string output_;
-  bool print_time_;
-  bool print_utf8_;
-  internal::Int32 random_seed_;
-  internal::Int32 repeat_;
-  bool shuffle_;
-  internal::Int32 stack_trace_depth_;
-  std::string stream_result_to_;
-  bool throw_on_failure_;
-} GTEST_ATTRIBUTE_UNUSED_;
-
-// Converts a Unicode code point to a narrow string in UTF-8 encoding.
-// code_point parameter is of type UInt32 because wchar_t may not be
-// wide enough to contain a code point.
-// If the code_point is not a valid Unicode code point
-// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
-// to "(Invalid Unicode 0xXXXXXXXX)".
-GTEST_API_ std::string CodePointToUtf8(UInt32 code_point);
-
-// Converts a wide string to a narrow string in UTF-8 encoding.
-// The wide string is assumed to have the following encoding:
-//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
-//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
-// Parameter str points to a null-terminated wide string.
-// Parameter num_chars may additionally limit the number
-// of wchar_t characters processed. -1 is used when the entire string
-// should be processed.
-// If the string contains code points that are not valid Unicode code points
-// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
-// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
-// and contains invalid UTF-16 surrogate pairs, values in those pairs
-// will be encoded as individual Unicode characters from Basic Normal Plane.
-GTEST_API_ std::string WideStringToUtf8(const wchar_t* str, int num_chars);
-
-// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
-// if the variable is present. If a file already exists at this location, this
-// function will write over it. If the variable is present, but the file cannot
-// be created, prints an error and exits.
-void WriteToShardStatusFileIfNeeded();
-
-// Checks whether sharding is enabled by examining the relevant
-// environment variable values. If the variables are present,
-// but inconsistent (e.g., shard_index >= total_shards), prints
-// an error and exits. If in_subprocess_for_death_test, sharding is
-// disabled because it must only be applied to the original test
-// process. Otherwise, we could filter out death tests we intended to execute.
-GTEST_API_ bool ShouldShard(const char* total_shards_str,
-                            const char* shard_index_str,
-                            bool in_subprocess_for_death_test);
-
-// Parses the environment variable var as an Int32. If it is unset,
-// returns default_val. If it is not an Int32, prints an error and
-// and aborts.
-GTEST_API_ Int32 Int32FromEnvOrDie(const char* env_var, Int32 default_val);
-
-// Given the total number of shards, the shard index, and the test id,
-// returns true if and only if the test should be run on this shard. The test id
-// is some arbitrary but unique non-negative integer assigned to each test
-// method. Assumes that 0 <= shard_index < total_shards.
-GTEST_API_ bool ShouldRunTestOnShard(
-    int total_shards, int shard_index, int test_id);
-
-// STL container utilities.
-
-// Returns the number of elements in the given container that satisfy
-// the given predicate.
-template <class Container, typename Predicate>
-inline int CountIf(const Container& c, Predicate predicate) {
-  // Implemented as an explicit loop since std::count_if() in libCstd on
-  // Solaris has a non-standard signature.
-  int count = 0;
-  for (typename Container::const_iterator it = c.begin(); it != c.end(); ++it) {
-    if (predicate(*it))
-      ++count;
-  }
-  return count;
-}
-
-// Applies a function/functor to each element in the container.
-template <class Container, typename Functor>
-void ForEach(const Container& c, Functor functor) {
-  std::for_each(c.begin(), c.end(), functor);
-}
-
-// Returns the i-th element of the vector, or default_value if i is not
-// in range [0, v.size()).
-template <typename E>
-inline E GetElementOr(const std::vector<E>& v, int i, E default_value) {
-  return (i < 0 || i >= static_cast<int>(v.size())) ? default_value
-                                                    : v[static_cast<size_t>(i)];
-}
-
-// Performs an in-place shuffle of a range of the vector's elements.
-// 'begin' and 'end' are element indices as an STL-style range;
-// i.e. [begin, end) are shuffled, where 'end' == size() means to
-// shuffle to the end of the vector.
-template <typename E>
-void ShuffleRange(internal::Random* random, int begin, int end,
-                  std::vector<E>* v) {
-  const int size = static_cast<int>(v->size());
-  GTEST_CHECK_(0 <= begin && begin <= size)
-      << "Invalid shuffle range start " << begin << ": must be in range [0, "
-      << size << "].";
-  GTEST_CHECK_(begin <= end && end <= size)
-      << "Invalid shuffle range finish " << end << ": must be in range ["
-      << begin << ", " << size << "].";
-
-  // Fisher-Yates shuffle, from
-  // http://en.wikipedia.org/wiki/Fisher-Yates_shuffle
-  for (int range_width = end - begin; range_width >= 2; range_width--) {
-    const int last_in_range = begin + range_width - 1;
-    const int selected =
-        begin +
-        static_cast<int>(random->Generate(static_cast<UInt32>(range_width)));
-    std::swap((*v)[static_cast<size_t>(selected)],
-              (*v)[static_cast<size_t>(last_in_range)]);
-  }
-}
-
-// Performs an in-place shuffle of the vector's elements.
-template <typename E>
-inline void Shuffle(internal::Random* random, std::vector<E>* v) {
-  ShuffleRange(random, 0, static_cast<int>(v->size()), v);
-}
-
-// A function for deleting an object.  Handy for being used as a
-// functor.
-template <typename T>
-static void Delete(T* x) {
-  delete x;
-}
-
-// A predicate that checks the key of a TestProperty against a known key.
-//
-// TestPropertyKeyIs is copyable.
-class TestPropertyKeyIs {
- public:
-  // Constructor.
-  //
-  // TestPropertyKeyIs has NO default constructor.
-  explicit TestPropertyKeyIs(const std::string& key) : key_(key) {}
-
-  // Returns true if and only if the test name of test property matches on key_.
-  bool operator()(const TestProperty& test_property) const {
-    return test_property.key() == key_;
-  }
-
- private:
-  std::string key_;
-};
-
-// Class UnitTestOptions.
-//
-// This class contains functions for processing options the user
-// specifies when running the tests.  It has only static members.
-//
-// In most cases, the user can specify an option using either an
-// environment variable or a command line flag.  E.g. you can set the
-// test filter using either GTEST_FILTER or --gtest_filter.  If both
-// the variable and the flag are present, the latter overrides the
-// former.
-class GTEST_API_ UnitTestOptions {
- public:
-  // Functions for processing the gtest_output flag.
-
-  // Returns the output format, or "" for normal printed output.
-  static std::string GetOutputFormat();
-
-  // Returns the absolute path of the requested output file, or the
-  // default (test_detail.xml in the original working directory) if
-  // none was explicitly specified.
-  static std::string GetAbsolutePathToOutputFile();
-
-  // Functions for processing the gtest_filter flag.
-
-  // Returns true if and only if the wildcard pattern matches the string.
-  // The first ':' or '\0' character in pattern marks the end of it.
-  //
-  // This recursive algorithm isn't very efficient, but is clear and
-  // works well enough for matching test names, which are short.
-  static bool PatternMatchesString(const char *pattern, const char *str);
-
-  // Returns true if and only if the user-specified filter matches the test
-  // suite name and the test name.
-  static bool FilterMatchesTest(const std::string& test_suite_name,
-                                const std::string& test_name);
-
-#if GTEST_OS_WINDOWS
-  // Function for supporting the gtest_catch_exception flag.
-
-  // Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
-  // given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
-  // This function is useful as an __except condition.
-  static int GTestShouldProcessSEH(DWORD exception_code);
-#endif  // GTEST_OS_WINDOWS
-
-  // Returns true if "name" matches the ':' separated list of glob-style
-  // filters in "filter".
-  static bool MatchesFilter(const std::string& name, const char* filter);
-};
-
-// Returns the current application's name, removing directory path if that
-// is present.  Used by UnitTestOptions::GetOutputFile.
-GTEST_API_ FilePath GetCurrentExecutableName();
-
-// The role interface for getting the OS stack trace as a string.
-class OsStackTraceGetterInterface {
- public:
-  OsStackTraceGetterInterface() {}
-  virtual ~OsStackTraceGetterInterface() {}
-
-  // Returns the current OS stack trace as an std::string.  Parameters:
-  //
-  //   max_depth  - the maximum number of stack frames to be included
-  //                in the trace.
-  //   skip_count - the number of top frames to be skipped; doesn't count
-  //                against max_depth.
-  virtual std::string CurrentStackTrace(int max_depth, int skip_count) = 0;
-
-  // UponLeavingGTest() should be called immediately before Google Test calls
-  // user code. It saves some information about the current stack that
-  // CurrentStackTrace() will use to find and hide Google Test stack frames.
-  virtual void UponLeavingGTest() = 0;
-
-  // This string is inserted in place of stack frames that are part of
-  // Google Test's implementation.
-  static const char* const kElidedFramesMarker;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetterInterface);
-};
-
-// A working implementation of the OsStackTraceGetterInterface interface.
-class OsStackTraceGetter : public OsStackTraceGetterInterface {
- public:
-  OsStackTraceGetter() {}
-
-  std::string CurrentStackTrace(int max_depth, int skip_count) override;
-  void UponLeavingGTest() override;
-
- private:
-#if GTEST_HAS_ABSL
-  Mutex mutex_;  // Protects all internal state.
-
-  // We save the stack frame below the frame that calls user code.
-  // We do this because the address of the frame immediately below
-  // the user code changes between the call to UponLeavingGTest()
-  // and any calls to the stack trace code from within the user code.
-  void* caller_frame_ = nullptr;
-#endif  // GTEST_HAS_ABSL
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(OsStackTraceGetter);
-};
-
-// Information about a Google Test trace point.
-struct TraceInfo {
-  const char* file;
-  int line;
-  std::string message;
-};
-
-// This is the default global test part result reporter used in UnitTestImpl.
-// This class should only be used by UnitTestImpl.
-class DefaultGlobalTestPartResultReporter
-  : public TestPartResultReporterInterface {
- public:
-  explicit DefaultGlobalTestPartResultReporter(UnitTestImpl* unit_test);
-  // Implements the TestPartResultReporterInterface. Reports the test part
-  // result in the current test.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  UnitTestImpl* const unit_test_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultGlobalTestPartResultReporter);
-};
-
-// This is the default per thread test part result reporter used in
-// UnitTestImpl. This class should only be used by UnitTestImpl.
-class DefaultPerThreadTestPartResultReporter
-    : public TestPartResultReporterInterface {
- public:
-  explicit DefaultPerThreadTestPartResultReporter(UnitTestImpl* unit_test);
-  // Implements the TestPartResultReporterInterface. The implementation just
-  // delegates to the current global test part result reporter of *unit_test_.
-  void ReportTestPartResult(const TestPartResult& result) override;
-
- private:
-  UnitTestImpl* const unit_test_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultPerThreadTestPartResultReporter);
-};
-
-// The private implementation of the UnitTest class.  We don't protect
-// the methods under a mutex, as this class is not accessible by a
-// user and the UnitTest class that delegates work to this class does
-// proper locking.
-class GTEST_API_ UnitTestImpl {
- public:
-  explicit UnitTestImpl(UnitTest* parent);
-  virtual ~UnitTestImpl();
-
-  // There are two different ways to register your own TestPartResultReporter.
-  // You can register your own repoter to listen either only for test results
-  // from the current thread or for results from all threads.
-  // By default, each per-thread test result repoter just passes a new
-  // TestPartResult to the global test result reporter, which registers the
-  // test part result for the currently running test.
-
-  // Returns the global test part result reporter.
-  TestPartResultReporterInterface* GetGlobalTestPartResultReporter();
-
-  // Sets the global test part result reporter.
-  void SetGlobalTestPartResultReporter(
-      TestPartResultReporterInterface* reporter);
-
-  // Returns the test part result reporter for the current thread.
-  TestPartResultReporterInterface* GetTestPartResultReporterForCurrentThread();
-
-  // Sets the test part result reporter for the current thread.
-  void SetTestPartResultReporterForCurrentThread(
-      TestPartResultReporterInterface* reporter);
-
-  // Gets the number of successful test suites.
-  int successful_test_suite_count() const;
-
-  // Gets the number of failed test suites.
-  int failed_test_suite_count() const;
-
-  // Gets the number of all test suites.
-  int total_test_suite_count() const;
-
-  // Gets the number of all test suites that contain at least one test
-  // that should run.
-  int test_suite_to_run_count() const;
-
-  // Gets the number of successful tests.
-  int successful_test_count() const;
-
-  // Gets the number of skipped tests.
-  int skipped_test_count() const;
-
-  // Gets the number of failed tests.
-  int failed_test_count() const;
-
-  // Gets the number of disabled tests that will be reported in the XML report.
-  int reportable_disabled_test_count() const;
-
-  // Gets the number of disabled tests.
-  int disabled_test_count() const;
-
-  // Gets the number of tests to be printed in the XML report.
-  int reportable_test_count() const;
-
-  // Gets the number of all tests.
-  int total_test_count() const;
-
-  // Gets the number of tests that should run.
-  int test_to_run_count() const;
-
-  // Gets the time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp() const { return start_timestamp_; }
-
-  // Gets the elapsed time, in milliseconds.
-  TimeInMillis elapsed_time() const { return elapsed_time_; }
-
-  // Returns true if and only if the unit test passed (i.e. all test suites
-  // passed).
-  bool Passed() const { return !Failed(); }
-
-  // Returns true if and only if the unit test failed (i.e. some test suite
-  // failed or something outside of all tests failed).
-  bool Failed() const {
-    return failed_test_suite_count() > 0 || ad_hoc_test_result()->Failed();
-  }
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  const TestSuite* GetTestSuite(int i) const {
-    const int index = GetElementOr(test_suite_indices_, i, -1);
-    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(i)];
-  }
-
-  //  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  const TestCase* GetTestCase(int i) const { return GetTestSuite(i); }
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Gets the i-th test suite among all the test suites. i can range from 0 to
-  // total_test_suite_count() - 1. If i is not in that range, returns NULL.
-  TestSuite* GetMutableSuiteCase(int i) {
-    const int index = GetElementOr(test_suite_indices_, i, -1);
-    return index < 0 ? nullptr : test_suites_[static_cast<size_t>(index)];
-  }
-
-  // Provides access to the event listener list.
-  TestEventListeners* listeners() { return &listeners_; }
-
-  // Returns the TestResult for the test that's currently running, or
-  // the TestResult for the ad hoc test if no test is running.
-  TestResult* current_test_result();
-
-  // Returns the TestResult for the ad hoc test.
-  const TestResult* ad_hoc_test_result() const { return &ad_hoc_test_result_; }
-
-  // Sets the OS stack trace getter.
-  //
-  // Does nothing if the input and the current OS stack trace getter
-  // are the same; otherwise, deletes the old getter and makes the
-  // input the current getter.
-  void set_os_stack_trace_getter(OsStackTraceGetterInterface* getter);
-
-  // Returns the current OS stack trace getter if it is not NULL;
-  // otherwise, creates an OsStackTraceGetter, makes it the current
-  // getter, and returns it.
-  OsStackTraceGetterInterface* os_stack_trace_getter();
-
-  // Returns the current OS stack trace as an std::string.
-  //
-  // The maximum number of stack frames to be included is specified by
-  // the gtest_stack_trace_depth flag.  The skip_count parameter
-  // specifies the number of top frames to be skipped, which doesn't
-  // count against the number of frames to be included.
-  //
-  // For example, if Foo() calls Bar(), which in turn calls
-  // CurrentOsStackTraceExceptTop(1), Foo() will be included in the
-  // trace but Bar() and CurrentOsStackTraceExceptTop() won't.
-  std::string CurrentOsStackTraceExceptTop(int skip_count) GTEST_NO_INLINE_;
-
-  // Finds and returns a TestSuite with the given name.  If one doesn't
-  // exist, creates one and returns it.
-  //
-  // Arguments:
-  //
-  //   test_suite_name: name of the test suite
-  //   type_param:     the name of the test's type parameter, or NULL if
-  //                   this is not a typed or a type-parameterized test.
-  //   set_up_tc:      pointer to the function that sets up the test suite
-  //   tear_down_tc:   pointer to the function that tears down the test suite
-  TestSuite* GetTestSuite(const char* test_suite_name, const char* type_param,
-                          internal::SetUpTestSuiteFunc set_up_tc,
-                          internal::TearDownTestSuiteFunc tear_down_tc);
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  TestCase* GetTestCase(const char* test_case_name, const char* type_param,
-                        internal::SetUpTestSuiteFunc set_up_tc,
-                        internal::TearDownTestSuiteFunc tear_down_tc) {
-    return GetTestSuite(test_case_name, type_param, set_up_tc, tear_down_tc);
-  }
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // Adds a TestInfo to the unit test.
-  //
-  // Arguments:
-  //
-  //   set_up_tc:    pointer to the function that sets up the test suite
-  //   tear_down_tc: pointer to the function that tears down the test suite
-  //   test_info:    the TestInfo object
-  void AddTestInfo(internal::SetUpTestSuiteFunc set_up_tc,
-                   internal::TearDownTestSuiteFunc tear_down_tc,
-                   TestInfo* test_info) {
-    // In order to support thread-safe death tests, we need to
-    // remember the original working directory when the test program
-    // was first invoked.  We cannot do this in RUN_ALL_TESTS(), as
-    // the user may have changed the current directory before calling
-    // RUN_ALL_TESTS().  Therefore we capture the current directory in
-    // AddTestInfo(), which is called to register a TEST or TEST_F
-    // before main() is reached.
-    if (original_working_dir_.IsEmpty()) {
-      original_working_dir_.Set(FilePath::GetCurrentDir());
-      GTEST_CHECK_(!original_working_dir_.IsEmpty())
-          << "Failed to get the current working directory.";
-    }
-
-    GetTestSuite(test_info->test_suite_name(), test_info->type_param(),
-                 set_up_tc, tear_down_tc)
-        ->AddTestInfo(test_info);
-  }
-
-  // Returns ParameterizedTestSuiteRegistry object used to keep track of
-  // value-parameterized tests and instantiate and register them.
-  internal::ParameterizedTestSuiteRegistry& parameterized_test_registry() {
-    return parameterized_test_registry_;
-  }
-
-  // Sets the TestSuite object for the test that's currently running.
-  void set_current_test_suite(TestSuite* a_current_test_suite) {
-    current_test_suite_ = a_current_test_suite;
-  }
-
-  // Sets the TestInfo object for the test that's currently running.  If
-  // current_test_info is NULL, the assertion results will be stored in
-  // ad_hoc_test_result_.
-  void set_current_test_info(TestInfo* a_current_test_info) {
-    current_test_info_ = a_current_test_info;
-  }
-
-  // Registers all parameterized tests defined using TEST_P and
-  // INSTANTIATE_TEST_SUITE_P, creating regular tests for each test/parameter
-  // combination. This method can be called more then once; it has guards
-  // protecting from registering the tests more then once.  If
-  // value-parameterized tests are disabled, RegisterParameterizedTests is
-  // present but does nothing.
-  void RegisterParameterizedTests();
-
-  // Runs all tests in this UnitTest object, prints the result, and
-  // returns true if all tests are successful.  If any exception is
-  // thrown during a test, this test is considered to be failed, but
-  // the rest of the tests will still be run.
-  bool RunAllTests();
-
-  // Clears the results of all tests, except the ad hoc tests.
-  void ClearNonAdHocTestResult() {
-    ForEach(test_suites_, TestSuite::ClearTestSuiteResult);
-  }
-
-  // Clears the results of ad-hoc test assertions.
-  void ClearAdHocTestResult() {
-    ad_hoc_test_result_.Clear();
-  }
-
-  // Adds a TestProperty to the current TestResult object when invoked in a
-  // context of a test or a test suite, or to the global property set. If the
-  // result already contains a property with the same key, the value will be
-  // updated.
-  void RecordProperty(const TestProperty& test_property);
-
-  enum ReactionToSharding {
-    HONOR_SHARDING_PROTOCOL,
-    IGNORE_SHARDING_PROTOCOL
-  };
-
-  // Matches the full name of each test against the user-specified
-  // filter to decide whether the test should run, then records the
-  // result in each TestSuite and TestInfo object.
-  // If shard_tests == HONOR_SHARDING_PROTOCOL, further filters tests
-  // based on sharding variables in the environment.
-  // Returns the number of tests that should run.
-  int FilterTests(ReactionToSharding shard_tests);
-
-  // Prints the names of the tests matching the user-specified filter flag.
-  void ListTestsMatchingFilter();
-
-  const TestSuite* current_test_suite() const { return current_test_suite_; }
-  TestInfo* current_test_info() { return current_test_info_; }
-  const TestInfo* current_test_info() const { return current_test_info_; }
-
-  // Returns the vector of environments that need to be set-up/torn-down
-  // before/after the tests are run.
-  std::vector<Environment*>& environments() { return environments_; }
-
-  // Getters for the per-thread Google Test trace stack.
-  std::vector<TraceInfo>& gtest_trace_stack() {
-    return *(gtest_trace_stack_.pointer());
-  }
-  const std::vector<TraceInfo>& gtest_trace_stack() const {
-    return gtest_trace_stack_.get();
-  }
-
-#if GTEST_HAS_DEATH_TEST
-  void InitDeathTestSubprocessControlInfo() {
-    internal_run_death_test_flag_.reset(ParseInternalRunDeathTestFlag());
-  }
-  // Returns a pointer to the parsed --gtest_internal_run_death_test
-  // flag, or NULL if that flag was not specified.
-  // This information is useful only in a death test child process.
-  // Must not be called before a call to InitGoogleTest.
-  const InternalRunDeathTestFlag* internal_run_death_test_flag() const {
-    return internal_run_death_test_flag_.get();
-  }
-
-  // Returns a pointer to the current death test factory.
-  internal::DeathTestFactory* death_test_factory() {
-    return death_test_factory_.get();
-  }
-
-  void SuppressTestEventsIfInSubprocess();
-
-  friend class ReplaceDeathTestFactory;
-#endif  // GTEST_HAS_DEATH_TEST
-
-  // Initializes the event listener performing XML output as specified by
-  // UnitTestOptions. Must not be called before InitGoogleTest.
-  void ConfigureXmlOutput();
-
-#if GTEST_CAN_STREAM_RESULTS_
-  // Initializes the event listener for streaming test results to a socket.
-  // Must not be called before InitGoogleTest.
-  void ConfigureStreamingOutput();
-#endif
-
-  // Performs initialization dependent upon flag values obtained in
-  // ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
-  // ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
-  // this function is also called from RunAllTests.  Since this function can be
-  // called more than once, it has to be idempotent.
-  void PostFlagParsingInit();
-
-  // Gets the random seed used at the start of the current test iteration.
-  int random_seed() const { return random_seed_; }
-
-  // Gets the random number generator.
-  internal::Random* random() { return &random_; }
-
-  // Shuffles all test suites, and the tests within each test suite,
-  // making sure that death tests are still run first.
-  void ShuffleTests();
-
-  // Restores the test suites and tests to their order before the first shuffle.
-  void UnshuffleTests();
-
-  // Returns the value of GTEST_FLAG(catch_exceptions) at the moment
-  // UnitTest::Run() starts.
-  bool catch_exceptions() const { return catch_exceptions_; }
-
- private:
-  friend class ::testing::UnitTest;
-
-  // Used by UnitTest::Run() to capture the state of
-  // GTEST_FLAG(catch_exceptions) at the moment it starts.
-  void set_catch_exceptions(bool value) { catch_exceptions_ = value; }
-
-  // The UnitTest object that owns this implementation object.
-  UnitTest* const parent_;
-
-  // The working directory when the first TEST() or TEST_F() was
-  // executed.
-  internal::FilePath original_working_dir_;
-
-  // The default test part result reporters.
-  DefaultGlobalTestPartResultReporter default_global_test_part_result_reporter_;
-  DefaultPerThreadTestPartResultReporter
-      default_per_thread_test_part_result_reporter_;
-
-  // Points to (but doesn't own) the global test part result reporter.
-  TestPartResultReporterInterface* global_test_part_result_repoter_;
-
-  // Protects read and write access to global_test_part_result_reporter_.
-  internal::Mutex global_test_part_result_reporter_mutex_;
-
-  // Points to (but doesn't own) the per-thread test part result reporter.
-  internal::ThreadLocal<TestPartResultReporterInterface*>
-      per_thread_test_part_result_reporter_;
-
-  // The vector of environments that need to be set-up/torn-down
-  // before/after the tests are run.
-  std::vector<Environment*> environments_;
-
-  // The vector of TestSuites in their original order.  It owns the
-  // elements in the vector.
-  std::vector<TestSuite*> test_suites_;
-
-  // Provides a level of indirection for the test suite list to allow
-  // easy shuffling and restoring the test suite order.  The i-th
-  // element of this vector is the index of the i-th test suite in the
-  // shuffled order.
-  std::vector<int> test_suite_indices_;
-
-  // ParameterizedTestRegistry object used to register value-parameterized
-  // tests.
-  internal::ParameterizedTestSuiteRegistry parameterized_test_registry_;
-
-  // Indicates whether RegisterParameterizedTests() has been called already.
-  bool parameterized_tests_registered_;
-
-  // Index of the last death test suite registered.  Initially -1.
-  int last_death_test_suite_;
-
-  // This points to the TestSuite for the currently running test.  It
-  // changes as Google Test goes through one test suite after another.
-  // When no test is running, this is set to NULL and Google Test
-  // stores assertion results in ad_hoc_test_result_.  Initially NULL.
-  TestSuite* current_test_suite_;
-
-  // This points to the TestInfo for the currently running test.  It
-  // changes as Google Test goes through one test after another.  When
-  // no test is running, this is set to NULL and Google Test stores
-  // assertion results in ad_hoc_test_result_.  Initially NULL.
-  TestInfo* current_test_info_;
-
-  // Normally, a user only writes assertions inside a TEST or TEST_F,
-  // or inside a function called by a TEST or TEST_F.  Since Google
-  // Test keeps track of which test is current running, it can
-  // associate such an assertion with the test it belongs to.
-  //
-  // If an assertion is encountered when no TEST or TEST_F is running,
-  // Google Test attributes the assertion result to an imaginary "ad hoc"
-  // test, and records the result in ad_hoc_test_result_.
-  TestResult ad_hoc_test_result_;
-
-  // The list of event listeners that can be used to track events inside
-  // Google Test.
-  TestEventListeners listeners_;
-
-  // The OS stack trace getter.  Will be deleted when the UnitTest
-  // object is destructed.  By default, an OsStackTraceGetter is used,
-  // but the user can set this field to use a custom getter if that is
-  // desired.
-  OsStackTraceGetterInterface* os_stack_trace_getter_;
-
-  // True if and only if PostFlagParsingInit() has been called.
-  bool post_flag_parse_init_performed_;
-
-  // The random number seed used at the beginning of the test run.
-  int random_seed_;
-
-  // Our random number generator.
-  internal::Random random_;
-
-  // The time of the test program start, in ms from the start of the
-  // UNIX epoch.
-  TimeInMillis start_timestamp_;
-
-  // How long the test took to run, in milliseconds.
-  TimeInMillis elapsed_time_;
-
-#if GTEST_HAS_DEATH_TEST
-  // The decomposed components of the gtest_internal_run_death_test flag,
-  // parsed when RUN_ALL_TESTS is called.
-  std::unique_ptr<InternalRunDeathTestFlag> internal_run_death_test_flag_;
-  std::unique_ptr<internal::DeathTestFactory> death_test_factory_;
-#endif  // GTEST_HAS_DEATH_TEST
-
-  // A per-thread stack of traces created by the SCOPED_TRACE() macro.
-  internal::ThreadLocal<std::vector<TraceInfo> > gtest_trace_stack_;
-
-  // The value of GTEST_FLAG(catch_exceptions) at the moment RunAllTests()
-  // starts.
-  bool catch_exceptions_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTestImpl);
-};  // class UnitTestImpl
-
-// Convenience function for accessing the global UnitTest
-// implementation object.
-inline UnitTestImpl* GetUnitTestImpl() {
-  return UnitTest::GetInstance()->impl();
-}
-
-#if GTEST_USES_SIMPLE_RE
-
-// Internal helper functions for implementing the simple regular
-// expression matcher.
-GTEST_API_ bool IsInSet(char ch, const char* str);
-GTEST_API_ bool IsAsciiDigit(char ch);
-GTEST_API_ bool IsAsciiPunct(char ch);
-GTEST_API_ bool IsRepeat(char ch);
-GTEST_API_ bool IsAsciiWhiteSpace(char ch);
-GTEST_API_ bool IsAsciiWordChar(char ch);
-GTEST_API_ bool IsValidEscape(char ch);
-GTEST_API_ bool AtomMatchesChar(bool escaped, char pattern, char ch);
-GTEST_API_ bool ValidateRegex(const char* regex);
-GTEST_API_ bool MatchRegexAtHead(const char* regex, const char* str);
-GTEST_API_ bool MatchRepetitionAndRegexAtHead(
-    bool escaped, char ch, char repeat, const char* regex, const char* str);
-GTEST_API_ bool MatchRegexAnywhere(const char* regex, const char* str);
-
-#endif  // GTEST_USES_SIMPLE_RE
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.
-GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, char** argv);
-GTEST_API_ void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv);
-
-#if GTEST_HAS_DEATH_TEST
-
-// Returns the message describing the last system error, regardless of the
-// platform.
-GTEST_API_ std::string GetLastErrnoDescription();
-
-// Attempts to parse a string into a positive integer pointed to by the
-// number parameter.  Returns true if that is possible.
-// GTEST_HAS_DEATH_TEST implies that we have ::std::string, so we can use
-// it here.
-template <typename Integer>
-bool ParseNaturalNumber(const ::std::string& str, Integer* number) {
-  // Fail fast if the given string does not begin with a digit;
-  // this bypasses strtoXXX's "optional leading whitespace and plus
-  // or minus sign" semantics, which are undesirable here.
-  if (str.empty() || !IsDigit(str[0])) {
-    return false;
-  }
-  errno = 0;
-
-  char* end;
-  // BiggestConvertible is the largest integer type that system-provided
-  // string-to-number conversion routines can return.
-
-# if GTEST_OS_WINDOWS && !defined(__GNUC__)
-
-  // MSVC and C++ Builder define __int64 instead of the standard long long.
-  typedef unsigned __int64 BiggestConvertible;
-  const BiggestConvertible parsed = _strtoui64(str.c_str(), &end, 10);
-
-# else
-
-  typedef unsigned long long BiggestConvertible;  // NOLINT
-  const BiggestConvertible parsed = strtoull(str.c_str(), &end, 10);
-
-# endif  // GTEST_OS_WINDOWS && !defined(__GNUC__)
-
-  const bool parse_success = *end == '\0' && errno == 0;
-
-  GTEST_CHECK_(sizeof(Integer) <= sizeof(parsed));
-
-  const Integer result = static_cast<Integer>(parsed);
-  if (parse_success && static_cast<BiggestConvertible>(result) == parsed) {
-    *number = result;
-    return true;
-  }
-  return false;
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-// TestResult contains some private methods that should be hidden from
-// Google Test user but are required for testing. This class allow our tests
-// to access them.
-//
-// This class is supplied only for the purpose of testing Google Test's own
-// constructs. Do not use it in user tests, either directly or indirectly.
-class TestResultAccessor {
- public:
-  static void RecordProperty(TestResult* test_result,
-                             const std::string& xml_element,
-                             const TestProperty& property) {
-    test_result->RecordProperty(xml_element, property);
-  }
-
-  static void ClearTestPartResults(TestResult* test_result) {
-    test_result->ClearTestPartResults();
-  }
-
-  static const std::vector<testing::TestPartResult>& test_part_results(
-      const TestResult& test_result) {
-    return test_result.test_part_results();
-  }
-};
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-// Streams test results to the given port on the given host machine.
-class StreamingListener : public EmptyTestEventListener {
- public:
-  // Abstract base class for writing strings to a socket.
-  class AbstractSocketWriter {
-   public:
-    virtual ~AbstractSocketWriter() {}
-
-    // Sends a string to the socket.
-    virtual void Send(const std::string& message) = 0;
-
-    // Closes the socket.
-    virtual void CloseConnection() {}
-
-    // Sends a string and a newline to the socket.
-    void SendLn(const std::string& message) { Send(message + "\n"); }
-  };
-
-  // Concrete class for actually writing strings to a socket.
-  class SocketWriter : public AbstractSocketWriter {
-   public:
-    SocketWriter(const std::string& host, const std::string& port)
-        : sockfd_(-1), host_name_(host), port_num_(port) {
-      MakeConnection();
-    }
-
-    ~SocketWriter() override {
-      if (sockfd_ != -1)
-        CloseConnection();
-    }
-
-    // Sends a string to the socket.
-    void Send(const std::string& message) override {
-      GTEST_CHECK_(sockfd_ != -1)
-          << "Send() can be called only when there is a connection.";
-
-      const auto len = static_cast<size_t>(message.length());
-      if (write(sockfd_, message.c_str(), len) != static_cast<ssize_t>(len)) {
-        GTEST_LOG_(WARNING)
-            << "stream_result_to: failed to stream to "
-            << host_name_ << ":" << port_num_;
-      }
-    }
-
-   private:
-    // Creates a client socket and connects to the server.
-    void MakeConnection();
-
-    // Closes the socket.
-    void CloseConnection() override {
-      GTEST_CHECK_(sockfd_ != -1)
-          << "CloseConnection() can be called only when there is a connection.";
-
-      close(sockfd_);
-      sockfd_ = -1;
-    }
-
-    int sockfd_;  // socket file descriptor
-    const std::string host_name_;
-    const std::string port_num_;
-
-    GTEST_DISALLOW_COPY_AND_ASSIGN_(SocketWriter);
-  };  // class SocketWriter
-
-  // Escapes '=', '&', '%', and '\n' characters in str as "%xx".
-  static std::string UrlEncode(const char* str);
-
-  StreamingListener(const std::string& host, const std::string& port)
-      : socket_writer_(new SocketWriter(host, port)) {
-    Start();
-  }
-
-  explicit StreamingListener(AbstractSocketWriter* socket_writer)
-      : socket_writer_(socket_writer) { Start(); }
-
-  void OnTestProgramStart(const UnitTest& /* unit_test */) override {
-    SendLn("event=TestProgramStart");
-  }
-
-  void OnTestProgramEnd(const UnitTest& unit_test) override {
-    // Note that Google Test current only report elapsed time for each
-    // test iteration, not for the entire test program.
-    SendLn("event=TestProgramEnd&passed=" + FormatBool(unit_test.Passed()));
-
-    // Notify the streaming server to stop.
-    socket_writer_->CloseConnection();
-  }
-
-  void OnTestIterationStart(const UnitTest& /* unit_test */,
-                            int iteration) override {
-    SendLn("event=TestIterationStart&iteration=" +
-           StreamableToString(iteration));
-  }
-
-  void OnTestIterationEnd(const UnitTest& unit_test,
-                          int /* iteration */) override {
-    SendLn("event=TestIterationEnd&passed=" +
-           FormatBool(unit_test.Passed()) + "&elapsed_time=" +
-           StreamableToString(unit_test.elapsed_time()) + "ms");
-  }
-
-  // Note that "event=TestCaseStart" is a wire format and has to remain
-  // "case" for compatibilty
-  void OnTestCaseStart(const TestCase& test_case) override {
-    SendLn(std::string("event=TestCaseStart&name=") + test_case.name());
-  }
-
-  // Note that "event=TestCaseEnd" is a wire format and has to remain
-  // "case" for compatibilty
-  void OnTestCaseEnd(const TestCase& test_case) override {
-    SendLn("event=TestCaseEnd&passed=" + FormatBool(test_case.Passed()) +
-           "&elapsed_time=" + StreamableToString(test_case.elapsed_time()) +
-           "ms");
-  }
-
-  void OnTestStart(const TestInfo& test_info) override {
-    SendLn(std::string("event=TestStart&name=") + test_info.name());
-  }
-
-  void OnTestEnd(const TestInfo& test_info) override {
-    SendLn("event=TestEnd&passed=" +
-           FormatBool((test_info.result())->Passed()) +
-           "&elapsed_time=" +
-           StreamableToString((test_info.result())->elapsed_time()) + "ms");
-  }
-
-  void OnTestPartResult(const TestPartResult& test_part_result) override {
-    const char* file_name = test_part_result.file_name();
-    if (file_name == nullptr) file_name = "";
-    SendLn("event=TestPartResult&file=" + UrlEncode(file_name) +
-           "&line=" + StreamableToString(test_part_result.line_number()) +
-           "&message=" + UrlEncode(test_part_result.message()));
-  }
-
- private:
-  // Sends the given message and a newline to the socket.
-  void SendLn(const std::string& message) { socket_writer_->SendLn(message); }
-
-  // Called at the start of streaming to notify the receiver what
-  // protocol we are using.
-  void Start() { SendLn("gtest_streaming_protocol_version=1.0"); }
-
-  std::string FormatBool(bool value) { return value ? "1" : "0"; }
-
-  const std::unique_ptr<AbstractSocketWriter> socket_writer_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(StreamingListener);
-};  // class StreamingListener
-
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-}  // namespace internal
-}  // namespace testing
-
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4251
-
-#endif  // GTEST_SRC_GTEST_INTERNAL_INL_H_
diff --git a/3rdparty/gtest/src/gtest-matchers.cc b/3rdparty/gtest/src/gtest-matchers.cc
deleted file mode 100644
index 7d2fb685..00000000
--- a/3rdparty/gtest/src/gtest-matchers.cc
+++ /dev/null
@@ -1,97 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file implements just enough of the matcher interface to allow
-// EXPECT_DEATH and friends to accept a matcher argument.
-
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-port.h"
-#include "gtest/gtest-matchers.h"
-
-#include <string>
-
-namespace testing {
-
-// Constructs a matcher that matches a const std::string& whose value is
-// equal to s.
-Matcher<const std::string&>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a const std::string& whose value is
-// equal to s.
-Matcher<const std::string&>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a std::string whose value is equal to
-// s.
-Matcher<std::string>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a std::string whose value is equal to
-// s.
-Matcher<std::string>::Matcher(const char* s) { *this = Eq(std::string(s)); }
-
-#if GTEST_HAS_ABSL
-// Constructs a matcher that matches a const absl::string_view& whose value is
-// equal to s.
-Matcher<const absl::string_view&>::Matcher(const std::string& s) {
-  *this = Eq(s);
-}
-
-// Constructs a matcher that matches a const absl::string_view& whose value is
-// equal to s.
-Matcher<const absl::string_view&>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a const absl::string_view& whose value is
-// equal to s.
-Matcher<const absl::string_view&>::Matcher(absl::string_view s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a absl::string_view whose value is equal to
-// s.
-Matcher<absl::string_view>::Matcher(const std::string& s) { *this = Eq(s); }
-
-// Constructs a matcher that matches a absl::string_view whose value is equal to
-// s.
-Matcher<absl::string_view>::Matcher(const char* s) {
-  *this = Eq(std::string(s));
-}
-
-// Constructs a matcher that matches a absl::string_view whose value is equal to
-// s.
-Matcher<absl::string_view>::Matcher(absl::string_view s) {
-  *this = Eq(std::string(s));
-}
-#endif  // GTEST_HAS_ABSL
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-port.cc b/3rdparty/gtest/src/gtest-port.cc
deleted file mode 100644
index fc5ba6be..00000000
--- a/3rdparty/gtest/src/gtest-port.cc
+++ /dev/null
@@ -1,1399 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/internal/gtest-port.h"
-
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <fstream>
-#include <memory>
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>
-# include <io.h>
-# include <sys/stat.h>
-# include <map>  // Used in ThreadLocal.
-# ifdef _MSC_VER
-#  include <crtdbg.h>
-# endif  // _MSC_VER
-#else
-# include <unistd.h>
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_MAC
-# include <mach/mach_init.h>
-# include <mach/task.h>
-# include <mach/vm_map.h>
-#endif  // GTEST_OS_MAC
-
-#if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-    GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-# include <sys/sysctl.h>
-# if GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
-#  include <sys/user.h>
-# endif
-#endif
-
-#if GTEST_OS_QNX
-# include <devctl.h>
-# include <fcntl.h>
-# include <sys/procfs.h>
-#endif  // GTEST_OS_QNX
-
-#if GTEST_OS_AIX
-# include <procinfo.h>
-# include <sys/types.h>
-#endif  // GTEST_OS_AIX
-
-#if GTEST_OS_FUCHSIA
-# include <zircon/process.h>
-# include <zircon/syscalls.h>
-#endif  // GTEST_OS_FUCHSIA
-
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest-message.h"
-#include "gtest/internal/gtest-internal.h"
-#include "gtest/internal/gtest-string.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-
-#if defined(_MSC_VER) || defined(__BORLANDC__)
-// MSVC and C++Builder do not provide a definition of STDERR_FILENO.
-const int kStdOutFileno = 1;
-const int kStdErrFileno = 2;
-#else
-const int kStdOutFileno = STDOUT_FILENO;
-const int kStdErrFileno = STDERR_FILENO;
-#endif  // _MSC_VER
-
-#if GTEST_OS_LINUX
-
-namespace {
-template <typename T>
-T ReadProcFileField(const std::string& filename, int field) {
-  std::string dummy;
-  std::ifstream file(filename.c_str());
-  while (field-- > 0) {
-    file >> dummy;
-  }
-  T output = 0;
-  file >> output;
-  return output;
-}
-}  // namespace
-
-// Returns the number of active threads, or 0 when there is an error.
-size_t GetThreadCount() {
-  const std::string filename =
-      (Message() << "/proc/" << getpid() << "/stat").GetString();
-  return ReadProcFileField<size_t>(filename, 19);
-}
-
-#elif GTEST_OS_MAC
-
-size_t GetThreadCount() {
-  const task_t task = mach_task_self();
-  mach_msg_type_number_t thread_count;
-  thread_act_array_t thread_list;
-  const kern_return_t status = task_threads(task, &thread_list, &thread_count);
-  if (status == KERN_SUCCESS) {
-    // task_threads allocates resources in thread_list and we need to free them
-    // to avoid leaks.
-    vm_deallocate(task,
-                  reinterpret_cast<vm_address_t>(thread_list),
-                  sizeof(thread_t) * thread_count);
-    return static_cast<size_t>(thread_count);
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-      GTEST_OS_NETBSD
-
-#if GTEST_OS_NETBSD
-#undef KERN_PROC
-#define KERN_PROC KERN_PROC2
-#define kinfo_proc kinfo_proc2
-#endif
-
-#if GTEST_OS_DRAGONFLY
-#define KP_NLWP(kp) (kp.kp_nthreads)
-#elif GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD
-#define KP_NLWP(kp) (kp.ki_numthreads)
-#elif GTEST_OS_NETBSD
-#define KP_NLWP(kp) (kp.p_nlwps)
-#endif
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  int mib[] = {
-    CTL_KERN,
-    KERN_PROC,
-    KERN_PROC_PID,
-    getpid(),
-#if GTEST_OS_NETBSD
-    sizeof(struct kinfo_proc),
-    1,
-#endif
-  };
-  u_int miblen = sizeof(mib) / sizeof(mib[0]);
-  struct kinfo_proc info;
-  size_t size = sizeof(info);
-  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
-    return 0;
-  }
-  return static_cast<size_t>(KP_NLWP(info));
-}
-#elif GTEST_OS_OPENBSD
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  int mib[] = {
-    CTL_KERN,
-    KERN_PROC,
-    KERN_PROC_PID | KERN_PROC_SHOW_THREADS,
-    getpid(),
-    sizeof(struct kinfo_proc),
-    0,
-  };
-  u_int miblen = sizeof(mib) / sizeof(mib[0]);
-
-  // get number of structs
-  size_t size;
-  if (sysctl(mib, miblen, NULL, &size, NULL, 0)) {
-    return 0;
-  }
-  mib[5] = size / mib[4];
-
-  // populate array of structs
-  struct kinfo_proc info[mib[5]];
-  if (sysctl(mib, miblen, &info, &size, NULL, 0)) {
-    return 0;
-  }
-
-  // exclude empty members
-  int nthreads = 0;
-  for (int i = 0; i < size / mib[4]; i++) {
-    if (info[i].p_tid != -1)
-      nthreads++;
-  }
-  return nthreads;
-}
-
-#elif GTEST_OS_QNX
-
-// Returns the number of threads running in the process, or 0 to indicate that
-// we cannot detect it.
-size_t GetThreadCount() {
-  const int fd = open("/proc/self/as", O_RDONLY);
-  if (fd < 0) {
-    return 0;
-  }
-  procfs_info process_info;
-  const int status =
-      devctl(fd, DCMD_PROC_INFO, &process_info, sizeof(process_info), nullptr);
-  close(fd);
-  if (status == EOK) {
-    return static_cast<size_t>(process_info.num_threads);
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_AIX
-
-size_t GetThreadCount() {
-  struct procentry64 entry;
-  pid_t pid = getpid();
-  int status = getprocs64(&entry, sizeof(entry), nullptr, 0, &pid, 1);
-  if (status == 1) {
-    return entry.pi_thcount;
-  } else {
-    return 0;
-  }
-}
-
-#elif GTEST_OS_FUCHSIA
-
-size_t GetThreadCount() {
-  int dummy_buffer;
-  size_t avail;
-  zx_status_t status = zx_object_get_info(
-      zx_process_self(),
-      ZX_INFO_PROCESS_THREADS,
-      &dummy_buffer,
-      0,
-      nullptr,
-      &avail);
-  if (status == ZX_OK) {
-    return avail;
-  } else {
-    return 0;
-  }
-}
-
-#else
-
-size_t GetThreadCount() {
-  // There's no portable way to detect the number of threads, so we just
-  // return 0 to indicate that we cannot detect it.
-  return 0;
-}
-
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
-
-void SleepMilliseconds(int n) {
-  ::Sleep(static_cast<DWORD>(n));
-}
-
-AutoHandle::AutoHandle()
-    : handle_(INVALID_HANDLE_VALUE) {}
-
-AutoHandle::AutoHandle(Handle handle)
-    : handle_(handle) {}
-
-AutoHandle::~AutoHandle() {
-  Reset();
-}
-
-AutoHandle::Handle AutoHandle::Get() const {
-  return handle_;
-}
-
-void AutoHandle::Reset() {
-  Reset(INVALID_HANDLE_VALUE);
-}
-
-void AutoHandle::Reset(HANDLE handle) {
-  // Resetting with the same handle we already own is invalid.
-  if (handle_ != handle) {
-    if (IsCloseable()) {
-      ::CloseHandle(handle_);
-    }
-    handle_ = handle;
-  } else {
-    GTEST_CHECK_(!IsCloseable())
-        << "Resetting a valid handle to itself is likely a programmer error "
-            "and thus not allowed.";
-  }
-}
-
-bool AutoHandle::IsCloseable() const {
-  // Different Windows APIs may use either of these values to represent an
-  // invalid handle.
-  return handle_ != nullptr && handle_ != INVALID_HANDLE_VALUE;
-}
-
-Notification::Notification()
-    : event_(::CreateEvent(nullptr,     // Default security attributes.
-                           TRUE,        // Do not reset automatically.
-                           FALSE,       // Initially unset.
-                           nullptr)) {  // Anonymous event.
-  GTEST_CHECK_(event_.Get() != nullptr);
-}
-
-void Notification::Notify() {
-  GTEST_CHECK_(::SetEvent(event_.Get()) != FALSE);
-}
-
-void Notification::WaitForNotification() {
-  GTEST_CHECK_(
-      ::WaitForSingleObject(event_.Get(), INFINITE) == WAIT_OBJECT_0);
-}
-
-Mutex::Mutex()
-    : owner_thread_id_(0),
-      type_(kDynamic),
-      critical_section_init_phase_(0),
-      critical_section_(new CRITICAL_SECTION) {
-  ::InitializeCriticalSection(critical_section_);
-}
-
-Mutex::~Mutex() {
-  // Static mutexes are leaked intentionally. It is not thread-safe to try
-  // to clean them up.
-  if (type_ == kDynamic) {
-    ::DeleteCriticalSection(critical_section_);
-    delete critical_section_;
-    critical_section_ = nullptr;
-  }
-}
-
-void Mutex::Lock() {
-  ThreadSafeLazyInit();
-  ::EnterCriticalSection(critical_section_);
-  owner_thread_id_ = ::GetCurrentThreadId();
-}
-
-void Mutex::Unlock() {
-  ThreadSafeLazyInit();
-  // We don't protect writing to owner_thread_id_ here, as it's the
-  // caller's responsibility to ensure that the current thread holds the
-  // mutex when this is called.
-  owner_thread_id_ = 0;
-  ::LeaveCriticalSection(critical_section_);
-}
-
-// Does nothing if the current thread holds the mutex. Otherwise, crashes
-// with high probability.
-void Mutex::AssertHeld() {
-  ThreadSafeLazyInit();
-  GTEST_CHECK_(owner_thread_id_ == ::GetCurrentThreadId())
-      << "The current thread is not holding the mutex @" << this;
-}
-
-namespace {
-
-#ifdef _MSC_VER
-// Use the RAII idiom to flag mem allocs that are intentionally never
-// deallocated. The motivation is to silence the false positive mem leaks
-// that are reported by the debug version of MS's CRT which can only detect
-// if an alloc is missing a matching deallocation.
-// Example:
-//    MemoryIsNotDeallocated memory_is_not_deallocated;
-//    critical_section_ = new CRITICAL_SECTION;
-//
-class MemoryIsNotDeallocated
-{
- public:
-  MemoryIsNotDeallocated() : old_crtdbg_flag_(0) {
-    old_crtdbg_flag_ = _CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
-    // Set heap allocation block type to _IGNORE_BLOCK so that MS debug CRT
-    // doesn't report mem leak if there's no matching deallocation.
-    _CrtSetDbgFlag(old_crtdbg_flag_ & ~_CRTDBG_ALLOC_MEM_DF);
-  }
-
-  ~MemoryIsNotDeallocated() {
-    // Restore the original _CRTDBG_ALLOC_MEM_DF flag
-    _CrtSetDbgFlag(old_crtdbg_flag_);
-  }
-
- private:
-  int old_crtdbg_flag_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(MemoryIsNotDeallocated);
-};
-#endif  // _MSC_VER
-
-}  // namespace
-
-// Initializes owner_thread_id_ and critical_section_ in static mutexes.
-void Mutex::ThreadSafeLazyInit() {
-  // Dynamic mutexes are initialized in the constructor.
-  if (type_ == kStatic) {
-    switch (
-        ::InterlockedCompareExchange(&critical_section_init_phase_, 1L, 0L)) {
-      case 0:
-        // If critical_section_init_phase_ was 0 before the exchange, we
-        // are the first to test it and need to perform the initialization.
-        owner_thread_id_ = 0;
-        {
-          // Use RAII to flag that following mem alloc is never deallocated.
-#ifdef _MSC_VER
-          MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-          critical_section_ = new CRITICAL_SECTION;
-        }
-        ::InitializeCriticalSection(critical_section_);
-        // Updates the critical_section_init_phase_ to 2 to signal
-        // initialization complete.
-        GTEST_CHECK_(::InterlockedCompareExchange(
-                          &critical_section_init_phase_, 2L, 1L) ==
-                      1L);
-        break;
-      case 1:
-        // Somebody else is already initializing the mutex; spin until they
-        // are done.
-        while (::InterlockedCompareExchange(&critical_section_init_phase_,
-                                            2L,
-                                            2L) != 2L) {
-          // Possibly yields the rest of the thread's time slice to other
-          // threads.
-          ::Sleep(0);
-        }
-        break;
-
-      case 2:
-        break;  // The mutex is already initialized and ready for use.
-
-      default:
-        GTEST_CHECK_(false)
-            << "Unexpected value of critical_section_init_phase_ "
-            << "while initializing a static mutex.";
-    }
-  }
-}
-
-namespace {
-
-class ThreadWithParamSupport : public ThreadWithParamBase {
- public:
-  static HANDLE CreateThread(Runnable* runnable,
-                             Notification* thread_can_start) {
-    ThreadMainParam* param = new ThreadMainParam(runnable, thread_can_start);
-    DWORD thread_id;
-    HANDLE thread_handle = ::CreateThread(
-        nullptr,  // Default security.
-        0,        // Default stack size.
-        &ThreadWithParamSupport::ThreadMain,
-        param,        // Parameter to ThreadMainStatic
-        0x0,          // Default creation flags.
-        &thread_id);  // Need a valid pointer for the call to work under Win98.
-    GTEST_CHECK_(thread_handle != nullptr)
-        << "CreateThread failed with error " << ::GetLastError() << ".";
-    if (thread_handle == nullptr) {
-      delete param;
-    }
-    return thread_handle;
-  }
-
- private:
-  struct ThreadMainParam {
-    ThreadMainParam(Runnable* runnable, Notification* thread_can_start)
-        : runnable_(runnable),
-          thread_can_start_(thread_can_start) {
-    }
-    std::unique_ptr<Runnable> runnable_;
-    // Does not own.
-    Notification* thread_can_start_;
-  };
-
-  static DWORD WINAPI ThreadMain(void* ptr) {
-    // Transfers ownership.
-    std::unique_ptr<ThreadMainParam> param(static_cast<ThreadMainParam*>(ptr));
-    if (param->thread_can_start_ != nullptr)
-      param->thread_can_start_->WaitForNotification();
-    param->runnable_->Run();
-    return 0;
-  }
-
-  // Prohibit instantiation.
-  ThreadWithParamSupport();
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParamSupport);
-};
-
-}  // namespace
-
-ThreadWithParamBase::ThreadWithParamBase(Runnable *runnable,
-                                         Notification* thread_can_start)
-      : thread_(ThreadWithParamSupport::CreateThread(runnable,
-                                                     thread_can_start)) {
-}
-
-ThreadWithParamBase::~ThreadWithParamBase() {
-  Join();
-}
-
-void ThreadWithParamBase::Join() {
-  GTEST_CHECK_(::WaitForSingleObject(thread_.Get(), INFINITE) == WAIT_OBJECT_0)
-      << "Failed to join the thread with error " << ::GetLastError() << ".";
-}
-
-// Maps a thread to a set of ThreadIdToThreadLocals that have values
-// instantiated on that thread and notifies them when the thread exits.  A
-// ThreadLocal instance is expected to persist until all threads it has
-// values on have terminated.
-class ThreadLocalRegistryImpl {
- public:
-  // Registers thread_local_instance as having value on the current thread.
-  // Returns a value that can be used to identify the thread from other threads.
-  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance) {
-    DWORD current_thread = ::GetCurrentThreadId();
-    MutexLock lock(&mutex_);
-    ThreadIdToThreadLocals* const thread_to_thread_locals =
-        GetThreadLocalsMapLocked();
-    ThreadIdToThreadLocals::iterator thread_local_pos =
-        thread_to_thread_locals->find(current_thread);
-    if (thread_local_pos == thread_to_thread_locals->end()) {
-      thread_local_pos = thread_to_thread_locals->insert(
-          std::make_pair(current_thread, ThreadLocalValues())).first;
-      StartWatcherThreadFor(current_thread);
-    }
-    ThreadLocalValues& thread_local_values = thread_local_pos->second;
-    ThreadLocalValues::iterator value_pos =
-        thread_local_values.find(thread_local_instance);
-    if (value_pos == thread_local_values.end()) {
-      value_pos =
-          thread_local_values
-              .insert(std::make_pair(
-                  thread_local_instance,
-                  std::shared_ptr<ThreadLocalValueHolderBase>(
-                      thread_local_instance->NewValueForCurrentThread())))
-              .first;
-    }
-    return value_pos->second.get();
-  }
-
-  static void OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance) {
-    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
-    // Clean up the ThreadLocalValues data structure while holding the lock, but
-    // defer the destruction of the ThreadLocalValueHolderBases.
-    {
-      MutexLock lock(&mutex_);
-      ThreadIdToThreadLocals* const thread_to_thread_locals =
-          GetThreadLocalsMapLocked();
-      for (ThreadIdToThreadLocals::iterator it =
-          thread_to_thread_locals->begin();
-          it != thread_to_thread_locals->end();
-          ++it) {
-        ThreadLocalValues& thread_local_values = it->second;
-        ThreadLocalValues::iterator value_pos =
-            thread_local_values.find(thread_local_instance);
-        if (value_pos != thread_local_values.end()) {
-          value_holders.push_back(value_pos->second);
-          thread_local_values.erase(value_pos);
-          // This 'if' can only be successful at most once, so theoretically we
-          // could break out of the loop here, but we don't bother doing so.
-        }
-      }
-    }
-    // Outside the lock, let the destructor for 'value_holders' deallocate the
-    // ThreadLocalValueHolderBases.
-  }
-
-  static void OnThreadExit(DWORD thread_id) {
-    GTEST_CHECK_(thread_id != 0) << ::GetLastError();
-    std::vector<std::shared_ptr<ThreadLocalValueHolderBase> > value_holders;
-    // Clean up the ThreadIdToThreadLocals data structure while holding the
-    // lock, but defer the destruction of the ThreadLocalValueHolderBases.
-    {
-      MutexLock lock(&mutex_);
-      ThreadIdToThreadLocals* const thread_to_thread_locals =
-          GetThreadLocalsMapLocked();
-      ThreadIdToThreadLocals::iterator thread_local_pos =
-          thread_to_thread_locals->find(thread_id);
-      if (thread_local_pos != thread_to_thread_locals->end()) {
-        ThreadLocalValues& thread_local_values = thread_local_pos->second;
-        for (ThreadLocalValues::iterator value_pos =
-            thread_local_values.begin();
-            value_pos != thread_local_values.end();
-            ++value_pos) {
-          value_holders.push_back(value_pos->second);
-        }
-        thread_to_thread_locals->erase(thread_local_pos);
-      }
-    }
-    // Outside the lock, let the destructor for 'value_holders' deallocate the
-    // ThreadLocalValueHolderBases.
-  }
-
- private:
-  // In a particular thread, maps a ThreadLocal object to its value.
-  typedef std::map<const ThreadLocalBase*,
-                   std::shared_ptr<ThreadLocalValueHolderBase> >
-      ThreadLocalValues;
-  // Stores all ThreadIdToThreadLocals having values in a thread, indexed by
-  // thread's ID.
-  typedef std::map<DWORD, ThreadLocalValues> ThreadIdToThreadLocals;
-
-  // Holds the thread id and thread handle that we pass from
-  // StartWatcherThreadFor to WatcherThreadFunc.
-  typedef std::pair<DWORD, HANDLE> ThreadIdAndHandle;
-
-  static void StartWatcherThreadFor(DWORD thread_id) {
-    // The returned handle will be kept in thread_map and closed by
-    // watcher_thread in WatcherThreadFunc.
-    HANDLE thread = ::OpenThread(SYNCHRONIZE | THREAD_QUERY_INFORMATION,
-                                 FALSE,
-                                 thread_id);
-    GTEST_CHECK_(thread != nullptr);
-    // We need to pass a valid thread ID pointer into CreateThread for it
-    // to work correctly under Win98.
-    DWORD watcher_thread_id;
-    HANDLE watcher_thread = ::CreateThread(
-        nullptr,  // Default security.
-        0,        // Default stack size
-        &ThreadLocalRegistryImpl::WatcherThreadFunc,
-        reinterpret_cast<LPVOID>(new ThreadIdAndHandle(thread_id, thread)),
-        CREATE_SUSPENDED, &watcher_thread_id);
-    GTEST_CHECK_(watcher_thread != nullptr);
-    // Give the watcher thread the same priority as ours to avoid being
-    // blocked by it.
-    ::SetThreadPriority(watcher_thread,
-                        ::GetThreadPriority(::GetCurrentThread()));
-    ::ResumeThread(watcher_thread);
-    ::CloseHandle(watcher_thread);
-  }
-
-  // Monitors exit from a given thread and notifies those
-  // ThreadIdToThreadLocals about thread termination.
-  static DWORD WINAPI WatcherThreadFunc(LPVOID param) {
-    const ThreadIdAndHandle* tah =
-        reinterpret_cast<const ThreadIdAndHandle*>(param);
-    GTEST_CHECK_(
-        ::WaitForSingleObject(tah->second, INFINITE) == WAIT_OBJECT_0);
-    OnThreadExit(tah->first);
-    ::CloseHandle(tah->second);
-    delete tah;
-    return 0;
-  }
-
-  // Returns map of thread local instances.
-  static ThreadIdToThreadLocals* GetThreadLocalsMapLocked() {
-    mutex_.AssertHeld();
-#ifdef _MSC_VER
-    MemoryIsNotDeallocated memory_is_not_deallocated;
-#endif  // _MSC_VER
-    static ThreadIdToThreadLocals* map = new ThreadIdToThreadLocals();
-    return map;
-  }
-
-  // Protects access to GetThreadLocalsMapLocked() and its return value.
-  static Mutex mutex_;
-  // Protects access to GetThreadMapLocked() and its return value.
-  static Mutex thread_map_mutex_;
-};
-
-Mutex ThreadLocalRegistryImpl::mutex_(Mutex::kStaticMutex);
-Mutex ThreadLocalRegistryImpl::thread_map_mutex_(Mutex::kStaticMutex);
-
-ThreadLocalValueHolderBase* ThreadLocalRegistry::GetValueOnCurrentThread(
-      const ThreadLocalBase* thread_local_instance) {
-  return ThreadLocalRegistryImpl::GetValueOnCurrentThread(
-      thread_local_instance);
-}
-
-void ThreadLocalRegistry::OnThreadLocalDestroyed(
-      const ThreadLocalBase* thread_local_instance) {
-  ThreadLocalRegistryImpl::OnThreadLocalDestroyed(thread_local_instance);
-}
-
-#endif  // GTEST_IS_THREADSAFE && GTEST_OS_WINDOWS
-
-#if GTEST_USES_POSIX_RE
-
-// Implements RE.  Currently only needed for death tests.
-
-RE::~RE() {
-  if (is_valid_) {
-    // regfree'ing an invalid regex might crash because the content
-    // of the regex is undefined. Since the regex's are essentially
-    // the same, one cannot be valid (or invalid) without the other
-    // being so too.
-    regfree(&partial_regex_);
-    regfree(&full_regex_);
-  }
-  free(const_cast<char*>(pattern_));
-}
-
-// Returns true if and only if regular expression re matches the entire str.
-bool RE::FullMatch(const char* str, const RE& re) {
-  if (!re.is_valid_) return false;
-
-  regmatch_t match;
-  return regexec(&re.full_regex_, str, 1, &match, 0) == 0;
-}
-
-// Returns true if and only if regular expression re matches a substring of
-// str (including str itself).
-bool RE::PartialMatch(const char* str, const RE& re) {
-  if (!re.is_valid_) return false;
-
-  regmatch_t match;
-  return regexec(&re.partial_regex_, str, 1, &match, 0) == 0;
-}
-
-// Initializes an RE from its string representation.
-void RE::Init(const char* regex) {
-  pattern_ = posix::StrDup(regex);
-
-  // Reserves enough bytes to hold the regular expression used for a
-  // full match.
-  const size_t full_regex_len = strlen(regex) + 10;
-  char* const full_pattern = new char[full_regex_len];
-
-  snprintf(full_pattern, full_regex_len, "^(%s)$", regex);
-  is_valid_ = regcomp(&full_regex_, full_pattern, REG_EXTENDED) == 0;
-  // We want to call regcomp(&partial_regex_, ...) even if the
-  // previous expression returns false.  Otherwise partial_regex_ may
-  // not be properly initialized can may cause trouble when it's
-  // freed.
-  //
-  // Some implementation of POSIX regex (e.g. on at least some
-  // versions of Cygwin) doesn't accept the empty string as a valid
-  // regex.  We change it to an equivalent form "()" to be safe.
-  if (is_valid_) {
-    const char* const partial_regex = (*regex == '\0') ? "()" : regex;
-    is_valid_ = regcomp(&partial_regex_, partial_regex, REG_EXTENDED) == 0;
-  }
-  EXPECT_TRUE(is_valid_)
-      << "Regular expression \"" << regex
-      << "\" is not a valid POSIX Extended regular expression.";
-
-  delete[] full_pattern;
-}
-
-#elif GTEST_USES_SIMPLE_RE
-
-// Returns true if and only if ch appears anywhere in str (excluding the
-// terminating '\0' character).
-bool IsInSet(char ch, const char* str) {
-  return ch != '\0' && strchr(str, ch) != nullptr;
-}
-
-// Returns true if and only if ch belongs to the given classification.
-// Unlike similar functions in <ctype.h>, these aren't affected by the
-// current locale.
-bool IsAsciiDigit(char ch) { return '0' <= ch && ch <= '9'; }
-bool IsAsciiPunct(char ch) {
-  return IsInSet(ch, "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~");
-}
-bool IsRepeat(char ch) { return IsInSet(ch, "?*+"); }
-bool IsAsciiWhiteSpace(char ch) { return IsInSet(ch, " \f\n\r\t\v"); }
-bool IsAsciiWordChar(char ch) {
-  return ('a' <= ch && ch <= 'z') || ('A' <= ch && ch <= 'Z') ||
-      ('0' <= ch && ch <= '9') || ch == '_';
-}
-
-// Returns true if and only if "\\c" is a supported escape sequence.
-bool IsValidEscape(char c) {
-  return (IsAsciiPunct(c) || IsInSet(c, "dDfnrsStvwW"));
-}
-
-// Returns true if and only if the given atom (specified by escaped and
-// pattern) matches ch.  The result is undefined if the atom is invalid.
-bool AtomMatchesChar(bool escaped, char pattern_char, char ch) {
-  if (escaped) {  // "\\p" where p is pattern_char.
-    switch (pattern_char) {
-      case 'd': return IsAsciiDigit(ch);
-      case 'D': return !IsAsciiDigit(ch);
-      case 'f': return ch == '\f';
-      case 'n': return ch == '\n';
-      case 'r': return ch == '\r';
-      case 's': return IsAsciiWhiteSpace(ch);
-      case 'S': return !IsAsciiWhiteSpace(ch);
-      case 't': return ch == '\t';
-      case 'v': return ch == '\v';
-      case 'w': return IsAsciiWordChar(ch);
-      case 'W': return !IsAsciiWordChar(ch);
-    }
-    return IsAsciiPunct(pattern_char) && pattern_char == ch;
-  }
-
-  return (pattern_char == '.' && ch != '\n') || pattern_char == ch;
-}
-
-// Helper function used by ValidateRegex() to format error messages.
-static std::string FormatRegexSyntaxError(const char* regex, int index) {
-  return (Message() << "Syntax error at index " << index
-          << " in simple regular expression \"" << regex << "\": ").GetString();
-}
-
-// Generates non-fatal failures and returns false if regex is invalid;
-// otherwise returns true.
-bool ValidateRegex(const char* regex) {
-  if (regex == nullptr) {
-    ADD_FAILURE() << "NULL is not a valid simple regular expression.";
-    return false;
-  }
-
-  bool is_valid = true;
-
-  // True if and only if ?, *, or + can follow the previous atom.
-  bool prev_repeatable = false;
-  for (int i = 0; regex[i]; i++) {
-    if (regex[i] == '\\') {  // An escape sequence
-      i++;
-      if (regex[i] == '\0') {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
-                      << "'\\' cannot appear at the end.";
-        return false;
-      }
-
-      if (!IsValidEscape(regex[i])) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i - 1)
-                      << "invalid escape sequence \"\\" << regex[i] << "\".";
-        is_valid = false;
-      }
-      prev_repeatable = true;
-    } else {  // Not an escape sequence.
-      const char ch = regex[i];
-
-      if (ch == '^' && i > 0) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'^' can only appear at the beginning.";
-        is_valid = false;
-      } else if (ch == '$' && regex[i + 1] != '\0') {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'$' can only appear at the end.";
-        is_valid = false;
-      } else if (IsInSet(ch, "()[]{}|")) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'" << ch << "' is unsupported.";
-        is_valid = false;
-      } else if (IsRepeat(ch) && !prev_repeatable) {
-        ADD_FAILURE() << FormatRegexSyntaxError(regex, i)
-                      << "'" << ch << "' can only follow a repeatable token.";
-        is_valid = false;
-      }
-
-      prev_repeatable = !IsInSet(ch, "^$?*+");
-    }
-  }
-
-  return is_valid;
-}
-
-// Matches a repeated regex atom followed by a valid simple regular
-// expression.  The regex atom is defined as c if escaped is false,
-// or \c otherwise.  repeat is the repetition meta character (?, *,
-// or +).  The behavior is undefined if str contains too many
-// characters to be indexable by size_t, in which case the test will
-// probably time out anyway.  We are fine with this limitation as
-// std::string has it too.
-bool MatchRepetitionAndRegexAtHead(
-    bool escaped, char c, char repeat, const char* regex,
-    const char* str) {
-  const size_t min_count = (repeat == '+') ? 1 : 0;
-  const size_t max_count = (repeat == '?') ? 1 :
-      static_cast<size_t>(-1) - 1;
-  // We cannot call numeric_limits::max() as it conflicts with the
-  // max() macro on Windows.
-
-  for (size_t i = 0; i <= max_count; ++i) {
-    // We know that the atom matches each of the first i characters in str.
-    if (i >= min_count && MatchRegexAtHead(regex, str + i)) {
-      // We have enough matches at the head, and the tail matches too.
-      // Since we only care about *whether* the pattern matches str
-      // (as opposed to *how* it matches), there is no need to find a
-      // greedy match.
-      return true;
-    }
-    if (str[i] == '\0' || !AtomMatchesChar(escaped, c, str[i]))
-      return false;
-  }
-  return false;
-}
-
-// Returns true if and only if regex matches a prefix of str. regex must
-// be a valid simple regular expression and not start with "^", or the
-// result is undefined.
-bool MatchRegexAtHead(const char* regex, const char* str) {
-  if (*regex == '\0')  // An empty regex matches a prefix of anything.
-    return true;
-
-  // "$" only matches the end of a string.  Note that regex being
-  // valid guarantees that there's nothing after "$" in it.
-  if (*regex == '$')
-    return *str == '\0';
-
-  // Is the first thing in regex an escape sequence?
-  const bool escaped = *regex == '\\';
-  if (escaped)
-    ++regex;
-  if (IsRepeat(regex[1])) {
-    // MatchRepetitionAndRegexAtHead() calls MatchRegexAtHead(), so
-    // here's an indirect recursion.  It terminates as the regex gets
-    // shorter in each recursion.
-    return MatchRepetitionAndRegexAtHead(
-        escaped, regex[0], regex[1], regex + 2, str);
-  } else {
-    // regex isn't empty, isn't "$", and doesn't start with a
-    // repetition.  We match the first atom of regex with the first
-    // character of str and recurse.
-    return (*str != '\0') && AtomMatchesChar(escaped, *regex, *str) &&
-        MatchRegexAtHead(regex + 1, str + 1);
-  }
-}
-
-// Returns true if and only if regex matches any substring of str.  regex must
-// be a valid simple regular expression, or the result is undefined.
-//
-// The algorithm is recursive, but the recursion depth doesn't exceed
-// the regex length, so we won't need to worry about running out of
-// stack space normally.  In rare cases the time complexity can be
-// exponential with respect to the regex length + the string length,
-// but usually it's must faster (often close to linear).
-bool MatchRegexAnywhere(const char* regex, const char* str) {
-  if (regex == nullptr || str == nullptr) return false;
-
-  if (*regex == '^')
-    return MatchRegexAtHead(regex + 1, str);
-
-  // A successful match can be anywhere in str.
-  do {
-    if (MatchRegexAtHead(regex, str))
-      return true;
-  } while (*str++ != '\0');
-  return false;
-}
-
-// Implements the RE class.
-
-RE::~RE() {
-  free(const_cast<char*>(pattern_));
-  free(const_cast<char*>(full_pattern_));
-}
-
-// Returns true if and only if regular expression re matches the entire str.
-bool RE::FullMatch(const char* str, const RE& re) {
-  return re.is_valid_ && MatchRegexAnywhere(re.full_pattern_, str);
-}
-
-// Returns true if and only if regular expression re matches a substring of
-// str (including str itself).
-bool RE::PartialMatch(const char* str, const RE& re) {
-  return re.is_valid_ && MatchRegexAnywhere(re.pattern_, str);
-}
-
-// Initializes an RE from its string representation.
-void RE::Init(const char* regex) {
-  pattern_ = full_pattern_ = nullptr;
-  if (regex != nullptr) {
-    pattern_ = posix::StrDup(regex);
-  }
-
-  is_valid_ = ValidateRegex(regex);
-  if (!is_valid_) {
-    // No need to calculate the full pattern when the regex is invalid.
-    return;
-  }
-
-  const size_t len = strlen(regex);
-  // Reserves enough bytes to hold the regular expression used for a
-  // full match: we need space to prepend a '^', append a '$', and
-  // terminate the string with '\0'.
-  char* buffer = static_cast<char*>(malloc(len + 3));
-  full_pattern_ = buffer;
-
-  if (*regex != '^')
-    *buffer++ = '^';  // Makes sure full_pattern_ starts with '^'.
-
-  // We don't use snprintf or strncpy, as they trigger a warning when
-  // compiled with VC++ 8.0.
-  memcpy(buffer, regex, len);
-  buffer += len;
-
-  if (len == 0 || regex[len - 1] != '$')
-    *buffer++ = '$';  // Makes sure full_pattern_ ends with '$'.
-
-  *buffer = '\0';
-}
-
-#endif  // GTEST_USES_POSIX_RE
-
-const char kUnknownFile[] = "unknown file";
-
-// Formats a source file path and a line number as they would appear
-// in an error message from the compiler used to compile this code.
-GTEST_API_ ::std::string FormatFileLocation(const char* file, int line) {
-  const std::string file_name(file == nullptr ? kUnknownFile : file);
-
-  if (line < 0) {
-    return file_name + ":";
-  }
-#ifdef _MSC_VER
-  return file_name + "(" + StreamableToString(line) + "):";
-#else
-  return file_name + ":" + StreamableToString(line) + ":";
-#endif  // _MSC_VER
-}
-
-// Formats a file location for compiler-independent XML output.
-// Although this function is not platform dependent, we put it next to
-// FormatFileLocation in order to contrast the two functions.
-// Note that FormatCompilerIndependentFileLocation() does NOT append colon
-// to the file location it produces, unlike FormatFileLocation().
-GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(
-    const char* file, int line) {
-  const std::string file_name(file == nullptr ? kUnknownFile : file);
-
-  if (line < 0)
-    return file_name;
-  else
-    return file_name + ":" + StreamableToString(line);
-}
-
-GTestLog::GTestLog(GTestLogSeverity severity, const char* file, int line)
-    : severity_(severity) {
-  const char* const marker =
-      severity == GTEST_INFO ?    "[  INFO ]" :
-      severity == GTEST_WARNING ? "[WARNING]" :
-      severity == GTEST_ERROR ?   "[ ERROR ]" : "[ FATAL ]";
-  GetStream() << ::std::endl << marker << " "
-              << FormatFileLocation(file, line).c_str() << ": ";
-}
-
-// Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
-GTestLog::~GTestLog() {
-  GetStream() << ::std::endl;
-  if (severity_ == GTEST_FATAL) {
-    fflush(stderr);
-    posix::Abort();
-  }
-}
-
-// Disable Microsoft deprecation warnings for POSIX functions called from
-// this class (creat, dup, dup2, and close)
-GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-
-#if GTEST_HAS_STREAM_REDIRECTION
-
-// Object that captures an output stream (stdout/stderr).
-class CapturedStream {
- public:
-  // The ctor redirects the stream to a temporary file.
-  explicit CapturedStream(int fd) : fd_(fd), uncaptured_fd_(dup(fd)) {
-# if GTEST_OS_WINDOWS
-    char temp_dir_path[MAX_PATH + 1] = { '\0' };  // NOLINT
-    char temp_file_path[MAX_PATH + 1] = { '\0' };  // NOLINT
-
-    ::GetTempPathA(sizeof(temp_dir_path), temp_dir_path);
-    const UINT success = ::GetTempFileNameA(temp_dir_path,
-                                            "gtest_redir",
-                                            0,  // Generate unique file name.
-                                            temp_file_path);
-    GTEST_CHECK_(success != 0)
-        << "Unable to create a temporary file in " << temp_dir_path;
-    const int captured_fd = creat(temp_file_path, _S_IREAD | _S_IWRITE);
-    GTEST_CHECK_(captured_fd != -1) << "Unable to open temporary file "
-                                    << temp_file_path;
-    filename_ = temp_file_path;
-# else
-    // There's no guarantee that a test has write access to the current
-    // directory, so we create the temporary file in the /tmp directory
-    // instead. We use /tmp on most systems, and /sdcard on Android.
-    // That's because Android doesn't have /tmp.
-#  if GTEST_OS_LINUX_ANDROID
-    // Note: Android applications are expected to call the framework's
-    // Context.getExternalStorageDirectory() method through JNI to get
-    // the location of the world-writable SD Card directory. However,
-    // this requires a Context handle, which cannot be retrieved
-    // globally from native code. Doing so also precludes running the
-    // code as part of a regular standalone executable, which doesn't
-    // run in a Dalvik process (e.g. when running it through 'adb shell').
-    //
-    // The location /data/local/tmp is directly accessible from native code.
-    // '/sdcard' and other variants cannot be relied on, as they are not
-    // guaranteed to be mounted, or may have a delay in mounting.
-    char name_template[] = "/data/local/tmp/gtest_captured_stream.XXXXXX";
-#  else
-    char name_template[] = "/tmp/captured_stream.XXXXXX";
-#  endif  // GTEST_OS_LINUX_ANDROID
-    const int captured_fd = mkstemp(name_template);
-    if (captured_fd == -1) {
-      GTEST_LOG_(WARNING)
-          << "Failed to create tmp file " << name_template
-          << " for test; does the test have access to the /tmp directory?";
-    }
-    filename_ = name_template;
-# endif  // GTEST_OS_WINDOWS
-    fflush(nullptr);
-    dup2(captured_fd, fd_);
-    close(captured_fd);
-  }
-
-  ~CapturedStream() {
-    remove(filename_.c_str());
-  }
-
-  std::string GetCapturedString() {
-    if (uncaptured_fd_ != -1) {
-      // Restores the original stream.
-      fflush(nullptr);
-      dup2(uncaptured_fd_, fd_);
-      close(uncaptured_fd_);
-      uncaptured_fd_ = -1;
-    }
-
-    FILE* const file = posix::FOpen(filename_.c_str(), "r");
-    if (file == nullptr) {
-      GTEST_LOG_(FATAL) << "Failed to open tmp file " << filename_
-                        << " for capturing stream.";
-    }
-    const std::string content = ReadEntireFile(file);
-    posix::FClose(file);
-    return content;
-  }
-
- private:
-  const int fd_;  // A stream to capture.
-  int uncaptured_fd_;
-  // Name of the temporary file holding the stderr output.
-  ::std::string filename_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(CapturedStream);
-};
-
-GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-static CapturedStream* g_captured_stderr = nullptr;
-static CapturedStream* g_captured_stdout = nullptr;
-
-// Starts capturing an output stream (stdout/stderr).
-static void CaptureStream(int fd, const char* stream_name,
-                          CapturedStream** stream) {
-  if (*stream != nullptr) {
-    GTEST_LOG_(FATAL) << "Only one " << stream_name
-                      << " capturer can exist at a time.";
-  }
-  *stream = new CapturedStream(fd);
-}
-
-// Stops capturing the output stream and returns the captured string.
-static std::string GetCapturedStream(CapturedStream** captured_stream) {
-  const std::string content = (*captured_stream)->GetCapturedString();
-
-  delete *captured_stream;
-  *captured_stream = nullptr;
-
-  return content;
-}
-
-// Starts capturing stdout.
-void CaptureStdout() {
-  CaptureStream(kStdOutFileno, "stdout", &g_captured_stdout);
-}
-
-// Starts capturing stderr.
-void CaptureStderr() {
-  CaptureStream(kStdErrFileno, "stderr", &g_captured_stderr);
-}
-
-// Stops capturing stdout and returns the captured string.
-std::string GetCapturedStdout() {
-  return GetCapturedStream(&g_captured_stdout);
-}
-
-// Stops capturing stderr and returns the captured string.
-std::string GetCapturedStderr() {
-  return GetCapturedStream(&g_captured_stderr);
-}
-
-#endif  // GTEST_HAS_STREAM_REDIRECTION
-
-
-
-
-
-size_t GetFileSize(FILE* file) {
-  fseek(file, 0, SEEK_END);
-  return static_cast<size_t>(ftell(file));
-}
-
-std::string ReadEntireFile(FILE* file) {
-  const size_t file_size = GetFileSize(file);
-  char* const buffer = new char[file_size];
-
-  size_t bytes_last_read = 0;  // # of bytes read in the last fread()
-  size_t bytes_read = 0;       // # of bytes read so far
-
-  fseek(file, 0, SEEK_SET);
-
-  // Keeps reading the file until we cannot read further or the
-  // pre-determined file size is reached.
-  do {
-    bytes_last_read = fread(buffer+bytes_read, 1, file_size-bytes_read, file);
-    bytes_read += bytes_last_read;
-  } while (bytes_last_read > 0 && bytes_read < file_size);
-
-  const std::string content(buffer, bytes_read);
-  delete[] buffer;
-
-  return content;
-}
-
-#if GTEST_HAS_DEATH_TEST
-static const std::vector<std::string>* g_injected_test_argvs =
-    nullptr;  // Owned.
-
-std::vector<std::string> GetInjectableArgvs() {
-  if (g_injected_test_argvs != nullptr) {
-    return *g_injected_test_argvs;
-  }
-  return GetArgvs();
-}
-
-void SetInjectableArgvs(const std::vector<std::string>* new_argvs) {
-  if (g_injected_test_argvs != new_argvs) delete g_injected_test_argvs;
-  g_injected_test_argvs = new_argvs;
-}
-
-void SetInjectableArgvs(const std::vector<std::string>& new_argvs) {
-  SetInjectableArgvs(
-      new std::vector<std::string>(new_argvs.begin(), new_argvs.end()));
-}
-
-void ClearInjectableArgvs() {
-  delete g_injected_test_argvs;
-  g_injected_test_argvs = nullptr;
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-#if GTEST_OS_WINDOWS_MOBILE
-namespace posix {
-void Abort() {
-  DebugBreak();
-  TerminateProcess(GetCurrentProcess(), 1);
-}
-}  // namespace posix
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-// Returns the name of the environment variable corresponding to the
-// given flag.  For example, FlagToEnvVar("foo") will return
-// "GTEST_FOO" in the open-source version.
-static std::string FlagToEnvVar(const char* flag) {
-  const std::string full_flag =
-      (Message() << GTEST_FLAG_PREFIX_ << flag).GetString();
-
-  Message env_var;
-  for (size_t i = 0; i != full_flag.length(); i++) {
-    env_var << ToUpper(full_flag.c_str()[i]);
-  }
-
-  return env_var.GetString();
-}
-
-// Parses 'str' for a 32-bit signed integer.  If successful, writes
-// the result to *value and returns true; otherwise leaves *value
-// unchanged and returns false.
-bool ParseInt32(const Message& src_text, const char* str, Int32* value) {
-  // Parses the environment variable as a decimal integer.
-  char* end = nullptr;
-  const long long_value = strtol(str, &end, 10);  // NOLINT
-
-  // Has strtol() consumed all characters in the string?
-  if (*end != '\0') {
-    // No - an invalid character was encountered.
-    Message msg;
-    msg << "WARNING: " << src_text
-        << " is expected to be a 32-bit integer, but actually"
-        << " has value \"" << str << "\".\n";
-    printf("%s", msg.GetString().c_str());
-    fflush(stdout);
-    return false;
-  }
-
-  // Is the parsed value in the range of an Int32?
-  const Int32 result = static_cast<Int32>(long_value);
-  if (long_value == LONG_MAX || long_value == LONG_MIN ||
-      // The parsed value overflows as a long.  (strtol() returns
-      // LONG_MAX or LONG_MIN when the input overflows.)
-      result != long_value
-      // The parsed value overflows as an Int32.
-      ) {
-    Message msg;
-    msg << "WARNING: " << src_text
-        << " is expected to be a 32-bit integer, but actually"
-        << " has value " << str << ", which overflows.\n";
-    printf("%s", msg.GetString().c_str());
-    fflush(stdout);
-    return false;
-  }
-
-  *value = result;
-  return true;
-}
-
-// Reads and returns the Boolean environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-//
-// The value is considered true if and only if it's not "0".
-bool BoolFromGTestEnv(const char* flag, bool default_value) {
-#if defined(GTEST_GET_BOOL_FROM_ENV_)
-  return GTEST_GET_BOOL_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = posix::GetEnv(env_var.c_str());
-  return string_value == nullptr ? default_value
-                                 : strcmp(string_value, "0") != 0;
-#endif  // defined(GTEST_GET_BOOL_FROM_ENV_)
-}
-
-// Reads and returns a 32-bit integer stored in the environment
-// variable corresponding to the given flag; if it isn't set or
-// doesn't represent a valid 32-bit integer, returns default_value.
-Int32 Int32FromGTestEnv(const char* flag, Int32 default_value) {
-#if defined(GTEST_GET_INT32_FROM_ENV_)
-  return GTEST_GET_INT32_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const string_value = posix::GetEnv(env_var.c_str());
-  if (string_value == nullptr) {
-    // The environment variable is not set.
-    return default_value;
-  }
-
-  Int32 result = default_value;
-  if (!ParseInt32(Message() << "Environment variable " << env_var,
-                  string_value, &result)) {
-    printf("The default value %s is used.\n",
-           (Message() << default_value).GetString().c_str());
-    fflush(stdout);
-    return default_value;
-  }
-
-  return result;
-#endif  // defined(GTEST_GET_INT32_FROM_ENV_)
-}
-
-// As a special case for the 'output' flag, if GTEST_OUTPUT is not
-// set, we look for XML_OUTPUT_FILE, which is set by the Bazel build
-// system.  The value of XML_OUTPUT_FILE is a filename without the
-// "xml:" prefix of GTEST_OUTPUT.
-// Note that this is meant to be called at the call site so it does
-// not check that the flag is 'output'
-// In essence this checks an env variable called XML_OUTPUT_FILE
-// and if it is set we prepend "xml:" to its value, if it not set we return ""
-std::string OutputFlagAlsoCheckEnvVar(){
-  std::string default_value_for_output_flag = "";
-  const char* xml_output_file_env = posix::GetEnv("XML_OUTPUT_FILE");
-  if (nullptr != xml_output_file_env) {
-    default_value_for_output_flag = std::string("xml:") + xml_output_file_env;
-  }
-  return default_value_for_output_flag;
-}
-
-// Reads and returns the string environment variable corresponding to
-// the given flag; if it's not set, returns default_value.
-const char* StringFromGTestEnv(const char* flag, const char* default_value) {
-#if defined(GTEST_GET_STRING_FROM_ENV_)
-  return GTEST_GET_STRING_FROM_ENV_(flag, default_value);
-#else
-  const std::string env_var = FlagToEnvVar(flag);
-  const char* const value = posix::GetEnv(env_var.c_str());
-  return value == nullptr ? default_value : value;
-#endif  // defined(GTEST_GET_STRING_FROM_ENV_)
-}
-
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-printers.cc b/3rdparty/gtest/src/gtest-printers.cc
deleted file mode 100644
index 3337be31..00000000
--- a/3rdparty/gtest/src/gtest-printers.cc
+++ /dev/null
@@ -1,442 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file implements a universal value printer that can print a
-// value of any type T:
-//
-//   void ::testing::internal::UniversalPrinter<T>::Print(value, ostream_ptr);
-//
-// It uses the << operator when possible, and prints the bytes in the
-// object otherwise.  A user can override its behavior for a class
-// type Foo by defining either operator<<(::std::ostream&, const Foo&)
-// or void PrintTo(const Foo&, ::std::ostream*) in the namespace that
-// defines Foo.
-
-#include "gtest/gtest-printers.h"
-#include <stdio.h>
-#include <cctype>
-#include <cwchar>
-#include <ostream>  // NOLINT
-#include <string>
-#include "gtest/internal/gtest-port.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-namespace {
-
-using ::std::ostream;
-
-// Prints a segment of bytes in the given object.
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-void PrintByteSegmentInObjectTo(const unsigned char* obj_bytes, size_t start,
-                                size_t count, ostream* os) {
-  char text[5] = "";
-  for (size_t i = 0; i != count; i++) {
-    const size_t j = start + i;
-    if (i != 0) {
-      // Organizes the bytes into groups of 2 for easy parsing by
-      // human.
-      if ((j % 2) == 0)
-        *os << ' ';
-      else
-        *os << '-';
-    }
-    GTEST_SNPRINTF_(text, sizeof(text), "%02X", obj_bytes[j]);
-    *os << text;
-  }
-}
-
-// Prints the bytes in the given value to the given ostream.
-void PrintBytesInObjectToImpl(const unsigned char* obj_bytes, size_t count,
-                              ostream* os) {
-  // Tells the user how big the object is.
-  *os << count << "-byte object <";
-
-  const size_t kThreshold = 132;
-  const size_t kChunkSize = 64;
-  // If the object size is bigger than kThreshold, we'll have to omit
-  // some details by printing only the first and the last kChunkSize
-  // bytes.
-  if (count < kThreshold) {
-    PrintByteSegmentInObjectTo(obj_bytes, 0, count, os);
-  } else {
-    PrintByteSegmentInObjectTo(obj_bytes, 0, kChunkSize, os);
-    *os << " ... ";
-    // Rounds up to 2-byte boundary.
-    const size_t resume_pos = (count - kChunkSize + 1)/2*2;
-    PrintByteSegmentInObjectTo(obj_bytes, resume_pos, count - resume_pos, os);
-  }
-  *os << ">";
-}
-
-}  // namespace
-
-namespace internal2 {
-
-// Delegates to PrintBytesInObjectToImpl() to print the bytes in the
-// given object.  The delegation simplifies the implementation, which
-// uses the << operator and thus is easier done outside of the
-// ::testing::internal namespace, which contains a << operator that
-// sometimes conflicts with the one in STL.
-void PrintBytesInObjectTo(const unsigned char* obj_bytes, size_t count,
-                          ostream* os) {
-  PrintBytesInObjectToImpl(obj_bytes, count, os);
-}
-
-}  // namespace internal2
-
-namespace internal {
-
-// Depending on the value of a char (or wchar_t), we print it in one
-// of three formats:
-//   - as is if it's a printable ASCII (e.g. 'a', '2', ' '),
-//   - as a hexadecimal escape sequence (e.g. '\x7F'), or
-//   - as a special escape sequence (e.g. '\r', '\n').
-enum CharFormat {
-  kAsIs,
-  kHexEscape,
-  kSpecialEscape
-};
-
-// Returns true if c is a printable ASCII character.  We test the
-// value of c directly instead of calling isprint(), which is buggy on
-// Windows Mobile.
-inline bool IsPrintableAscii(wchar_t c) {
-  return 0x20 <= c && c <= 0x7E;
-}
-
-// Prints a wide or narrow char c as a character literal without the
-// quotes, escaping it when necessary; returns how c was formatted.
-// The template argument UnsignedChar is the unsigned version of Char,
-// which is the type of c.
-template <typename UnsignedChar, typename Char>
-static CharFormat PrintAsCharLiteralTo(Char c, ostream* os) {
-  wchar_t w_c = static_cast<wchar_t>(c);
-  switch (w_c) {
-    case L'\0':
-      *os << "\\0";
-      break;
-    case L'\'':
-      *os << "\\'";
-      break;
-    case L'\\':
-      *os << "\\\\";
-      break;
-    case L'\a':
-      *os << "\\a";
-      break;
-    case L'\b':
-      *os << "\\b";
-      break;
-    case L'\f':
-      *os << "\\f";
-      break;
-    case L'\n':
-      *os << "\\n";
-      break;
-    case L'\r':
-      *os << "\\r";
-      break;
-    case L'\t':
-      *os << "\\t";
-      break;
-    case L'\v':
-      *os << "\\v";
-      break;
-    default:
-      if (IsPrintableAscii(w_c)) {
-        *os << static_cast<char>(c);
-        return kAsIs;
-      } else {
-        ostream::fmtflags flags = os->flags();
-        *os << "\\x" << std::hex << std::uppercase
-            << static_cast<int>(static_cast<UnsignedChar>(c));
-        os->flags(flags);
-        return kHexEscape;
-      }
-  }
-  return kSpecialEscape;
-}
-
-// Prints a wchar_t c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(wchar_t c, ostream* os) {
-  switch (c) {
-    case L'\'':
-      *os << "'";
-      return kAsIs;
-    case L'"':
-      *os << "\\\"";
-      return kSpecialEscape;
-    default:
-      return PrintAsCharLiteralTo<wchar_t>(c, os);
-  }
-}
-
-// Prints a char c as if it's part of a string literal, escaping it when
-// necessary; returns how c was formatted.
-static CharFormat PrintAsStringLiteralTo(char c, ostream* os) {
-  return PrintAsStringLiteralTo(
-      static_cast<wchar_t>(static_cast<unsigned char>(c)), os);
-}
-
-// Prints a wide or narrow character c and its code.  '\0' is printed
-// as "'\\0'", other unprintable characters are also properly escaped
-// using the standard C++ escape sequence.  The template argument
-// UnsignedChar is the unsigned version of Char, which is the type of c.
-template <typename UnsignedChar, typename Char>
-void PrintCharAndCodeTo(Char c, ostream* os) {
-  // First, print c as a literal in the most readable form we can find.
-  *os << ((sizeof(c) > 1) ? "L'" : "'");
-  const CharFormat format = PrintAsCharLiteralTo<UnsignedChar>(c, os);
-  *os << "'";
-
-  // To aid user debugging, we also print c's code in decimal, unless
-  // it's 0 (in which case c was printed as '\\0', making the code
-  // obvious).
-  if (c == 0)
-    return;
-  *os << " (" << static_cast<int>(c);
-
-  // For more convenience, we print c's code again in hexadecimal,
-  // unless c was already printed in the form '\x##' or the code is in
-  // [1, 9].
-  if (format == kHexEscape || (1 <= c && c <= 9)) {
-    // Do nothing.
-  } else {
-    *os << ", 0x" << String::FormatHexInt(static_cast<int>(c));
-  }
-  *os << ")";
-}
-
-void PrintTo(unsigned char c, ::std::ostream* os) {
-  PrintCharAndCodeTo<unsigned char>(c, os);
-}
-void PrintTo(signed char c, ::std::ostream* os) {
-  PrintCharAndCodeTo<unsigned char>(c, os);
-}
-
-// Prints a wchar_t as a symbol if it is printable or as its internal
-// code otherwise and also as its code.  L'\0' is printed as "L'\\0'".
-void PrintTo(wchar_t wc, ostream* os) {
-  PrintCharAndCodeTo<wchar_t>(wc, os);
-}
-
-// Prints the given array of characters to the ostream.  CharType must be either
-// char or wchar_t.
-// The array starts at begin, the length is len, it may include '\0' characters
-// and may not be NUL-terminated.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static CharFormat PrintCharsAsStringTo(
-    const CharType* begin, size_t len, ostream* os) {
-  const char* const kQuoteBegin = sizeof(CharType) == 1 ? "\"" : "L\"";
-  *os << kQuoteBegin;
-  bool is_previous_hex = false;
-  CharFormat print_format = kAsIs;
-  for (size_t index = 0; index < len; ++index) {
-    const CharType cur = begin[index];
-    if (is_previous_hex && IsXDigit(cur)) {
-      // Previous character is of '\x..' form and this character can be
-      // interpreted as another hexadecimal digit in its number. Break string to
-      // disambiguate.
-      *os << "\" " << kQuoteBegin;
-    }
-    is_previous_hex = PrintAsStringLiteralTo(cur, os) == kHexEscape;
-    // Remember if any characters required hex escaping.
-    if (is_previous_hex) {
-      print_format = kHexEscape;
-    }
-  }
-  *os << "\"";
-  return print_format;
-}
-
-// Prints a (const) char/wchar_t array of 'len' elements, starting at address
-// 'begin'.  CharType must be either char or wchar_t.
-template <typename CharType>
-GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
-GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_HWADDRESS_
-GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
-static void UniversalPrintCharArray(
-    const CharType* begin, size_t len, ostream* os) {
-  // The code
-  //   const char kFoo[] = "foo";
-  // generates an array of 4, not 3, elements, with the last one being '\0'.
-  //
-  // Therefore when printing a char array, we don't print the last element if
-  // it's '\0', such that the output matches the string literal as it's
-  // written in the source code.
-  if (len > 0 && begin[len - 1] == '\0') {
-    PrintCharsAsStringTo(begin, len - 1, os);
-    return;
-  }
-
-  // If, however, the last element in the array is not '\0', e.g.
-  //    const char kFoo[] = { 'f', 'o', 'o' };
-  // we must print the entire array.  We also print a message to indicate
-  // that the array is not NUL-terminated.
-  PrintCharsAsStringTo(begin, len, os);
-  *os << " (no terminating NUL)";
-}
-
-// Prints a (const) char array of 'len' elements, starting at address 'begin'.
-void UniversalPrintArray(const char* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints a (const) wchar_t array of 'len' elements, starting at address
-// 'begin'.
-void UniversalPrintArray(const wchar_t* begin, size_t len, ostream* os) {
-  UniversalPrintCharArray(begin, len, os);
-}
-
-// Prints the given C string to the ostream.
-void PrintTo(const char* s, ostream* os) {
-  if (s == nullptr) {
-    *os << "NULL";
-  } else {
-    *os << ImplicitCast_<const void*>(s) << " pointing to ";
-    PrintCharsAsStringTo(s, strlen(s), os);
-  }
-}
-
-// MSVC compiler can be configured to define whar_t as a typedef
-// of unsigned short. Defining an overload for const wchar_t* in that case
-// would cause pointers to unsigned shorts be printed as wide strings,
-// possibly accessing more memory than intended and causing invalid
-// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
-// wchar_t is implemented as a native type.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-// Prints the given wide C string to the ostream.
-void PrintTo(const wchar_t* s, ostream* os) {
-  if (s == nullptr) {
-    *os << "NULL";
-  } else {
-    *os << ImplicitCast_<const void*>(s) << " pointing to ";
-    PrintCharsAsStringTo(s, wcslen(s), os);
-  }
-}
-#endif  // wchar_t is native
-
-namespace {
-
-bool ContainsUnprintableControlCodes(const char* str, size_t length) {
-  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
-
-  for (size_t i = 0; i < length; i++) {
-    unsigned char ch = *s++;
-    if (std::iscntrl(ch)) {
-        switch (ch) {
-        case '\t':
-        case '\n':
-        case '\r':
-          break;
-        default:
-          return true;
-        }
-      }
-  }
-  return false;
-}
-
-bool IsUTF8TrailByte(unsigned char t) { return 0x80 <= t && t<= 0xbf; }
-
-bool IsValidUTF8(const char* str, size_t length) {
-  const unsigned char *s = reinterpret_cast<const unsigned char *>(str);
-
-  for (size_t i = 0; i < length;) {
-    unsigned char lead = s[i++];
-
-    if (lead <= 0x7f) {
-      continue;  // single-byte character (ASCII) 0..7F
-    }
-    if (lead < 0xc2) {
-      return false;  // trail byte or non-shortest form
-    } else if (lead <= 0xdf && (i + 1) <= length && IsUTF8TrailByte(s[i])) {
-      ++i;  // 2-byte character
-    } else if (0xe0 <= lead && lead <= 0xef && (i + 2) <= length &&
-               IsUTF8TrailByte(s[i]) &&
-               IsUTF8TrailByte(s[i + 1]) &&
-               // check for non-shortest form and surrogate
-               (lead != 0xe0 || s[i] >= 0xa0) &&
-               (lead != 0xed || s[i] < 0xa0)) {
-      i += 2;  // 3-byte character
-    } else if (0xf0 <= lead && lead <= 0xf4 && (i + 3) <= length &&
-               IsUTF8TrailByte(s[i]) &&
-               IsUTF8TrailByte(s[i + 1]) &&
-               IsUTF8TrailByte(s[i + 2]) &&
-               // check for non-shortest form
-               (lead != 0xf0 || s[i] >= 0x90) &&
-               (lead != 0xf4 || s[i] < 0x90)) {
-      i += 3;  // 4-byte character
-    } else {
-      return false;
-    }
-  }
-  return true;
-}
-
-void ConditionalPrintAsText(const char* str, size_t length, ostream* os) {
-  if (!ContainsUnprintableControlCodes(str, length) &&
-      IsValidUTF8(str, length)) {
-    *os << "\n    As Text: \"" << str << "\"";
-  }
-}
-
-}  // anonymous namespace
-
-void PrintStringTo(const ::std::string& s, ostream* os) {
-  if (PrintCharsAsStringTo(s.data(), s.size(), os) == kHexEscape) {
-    if (GTEST_FLAG(print_utf8)) {
-      ConditionalPrintAsText(s.data(), s.size(), os);
-    }
-  }
-}
-
-#if GTEST_HAS_STD_WSTRING
-void PrintWideStringTo(const ::std::wstring& s, ostream* os) {
-  PrintCharsAsStringTo(s.data(), s.size(), os);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-}  // namespace internal
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-test-part.cc b/3rdparty/gtest/src/gtest-test-part.cc
deleted file mode 100644
index 178317a6..00000000
--- a/3rdparty/gtest/src/gtest-test-part.cc
+++ /dev/null
@@ -1,104 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-
-#include "gtest/gtest-test-part.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-using internal::GetUnitTestImpl;
-
-// Gets the summary of the failure message by omitting the stack trace
-// in it.
-std::string TestPartResult::ExtractSummary(const char* message) {
-  const char* const stack_trace = strstr(message, internal::kStackTraceMarker);
-  return stack_trace == nullptr ? message : std::string(message, stack_trace);
-}
-
-// Prints a TestPartResult object.
-std::ostream& operator<<(std::ostream& os, const TestPartResult& result) {
-  return os << result.file_name() << ":" << result.line_number() << ": "
-            << (result.type() == TestPartResult::kSuccess
-                    ? "Success"
-                    : result.type() == TestPartResult::kSkip
-                          ? "Skipped"
-                          : result.type() == TestPartResult::kFatalFailure
-                                ? "Fatal failure"
-                                : "Non-fatal failure")
-            << ":\n"
-            << result.message() << std::endl;
-}
-
-// Appends a TestPartResult to the array.
-void TestPartResultArray::Append(const TestPartResult& result) {
-  array_.push_back(result);
-}
-
-// Returns the TestPartResult at the given index (0-based).
-const TestPartResult& TestPartResultArray::GetTestPartResult(int index) const {
-  if (index < 0 || index >= size()) {
-    printf("\nInvalid index (%d) into TestPartResultArray.\n", index);
-    internal::posix::Abort();
-  }
-
-  return array_[static_cast<size_t>(index)];
-}
-
-// Returns the number of TestPartResult objects in the array.
-int TestPartResultArray::size() const {
-  return static_cast<int>(array_.size());
-}
-
-namespace internal {
-
-HasNewFatalFailureHelper::HasNewFatalFailureHelper()
-    : has_new_fatal_failure_(false),
-      original_reporter_(GetUnitTestImpl()->
-                         GetTestPartResultReporterForCurrentThread()) {
-  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(this);
-}
-
-HasNewFatalFailureHelper::~HasNewFatalFailureHelper() {
-  GetUnitTestImpl()->SetTestPartResultReporterForCurrentThread(
-      original_reporter_);
-}
-
-void HasNewFatalFailureHelper::ReportTestPartResult(
-    const TestPartResult& result) {
-  if (result.fatally_failed())
-    has_new_fatal_failure_ = true;
-  original_reporter_->ReportTestPartResult(result);
-}
-
-}  // namespace internal
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest-typed-test.cc b/3rdparty/gtest/src/gtest-typed-test.cc
deleted file mode 100644
index 8677caf7..00000000
--- a/3rdparty/gtest/src/gtest-typed-test.cc
+++ /dev/null
@@ -1,118 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest-typed-test.h"
-
-#include "gtest/gtest.h"
-
-namespace testing {
-namespace internal {
-
-#if GTEST_HAS_TYPED_TEST_P
-
-// Skips to the first non-space char in str. Returns an empty string if str
-// contains only whitespace characters.
-static const char* SkipSpaces(const char* str) {
-  while (IsSpace(*str))
-    str++;
-  return str;
-}
-
-static std::vector<std::string> SplitIntoTestNames(const char* src) {
-  std::vector<std::string> name_vec;
-  src = SkipSpaces(src);
-  for (; src != nullptr; src = SkipComma(src)) {
-    name_vec.push_back(StripTrailingSpaces(GetPrefixUntilComma(src)));
-  }
-  return name_vec;
-}
-
-// Verifies that registered_tests match the test names in
-// registered_tests_; returns registered_tests if successful, or
-// aborts the program otherwise.
-const char* TypedTestSuitePState::VerifyRegisteredTestNames(
-    const char* file, int line, const char* registered_tests) {
-  typedef RegisteredTestsMap::const_iterator RegisteredTestIter;
-  registered_ = true;
-
-  std::vector<std::string> name_vec = SplitIntoTestNames(registered_tests);
-
-  Message errors;
-
-  std::set<std::string> tests;
-  for (std::vector<std::string>::const_iterator name_it = name_vec.begin();
-       name_it != name_vec.end(); ++name_it) {
-    const std::string& name = *name_it;
-    if (tests.count(name) != 0) {
-      errors << "Test " << name << " is listed more than once.\n";
-      continue;
-    }
-
-    bool found = false;
-    for (RegisteredTestIter it = registered_tests_.begin();
-         it != registered_tests_.end();
-         ++it) {
-      if (name == it->first) {
-        found = true;
-        break;
-      }
-    }
-
-    if (found) {
-      tests.insert(name);
-    } else {
-      errors << "No test named " << name
-             << " can be found in this test suite.\n";
-    }
-  }
-
-  for (RegisteredTestIter it = registered_tests_.begin();
-       it != registered_tests_.end();
-       ++it) {
-    if (tests.count(it->first) == 0) {
-      errors << "You forgot to list test " << it->first << ".\n";
-    }
-  }
-
-  const std::string& errors_str = errors.GetString();
-  if (errors_str != "") {
-    fprintf(stderr, "%s %s", FormatFileLocation(file, line).c_str(),
-            errors_str.c_str());
-    fflush(stderr);
-    posix::Abort();
-  }
-
-  return registered_tests;
-}
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest.cc b/3rdparty/gtest/src/gtest.cc
deleted file mode 100644
index a5b4e5ac..00000000
--- a/3rdparty/gtest/src/gtest.cc
+++ /dev/null
@@ -1,6177 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-
-#include "gtest/gtest.h"
-#include "gtest/internal/custom/gtest.h"
-#include "gtest/gtest-spi.h"
-
-#include <ctype.h>
-#include <math.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-#include <wchar.h>
-#include <wctype.h>
-
-#include <algorithm>
-#include <iomanip>
-#include <limits>
-#include <list>
-#include <map>
-#include <ostream>  // NOLINT
-#include <sstream>
-#include <vector>
-
-#if GTEST_OS_LINUX
-
-# define GTEST_HAS_GETTIMEOFDAY_ 1
-
-# include <fcntl.h>  // NOLINT
-# include <limits.h>  // NOLINT
-# include <sched.h>  // NOLINT
-// Declares vsnprintf().  This header is not available on Windows.
-# include <strings.h>  // NOLINT
-# include <sys/mman.h>  // NOLINT
-# include <sys/time.h>  // NOLINT
-# include <unistd.h>  // NOLINT
-# include <string>
-
-#elif GTEST_OS_ZOS
-# define GTEST_HAS_GETTIMEOFDAY_ 1
-# include <sys/time.h>  // NOLINT
-
-// On z/OS we additionally need strings.h for strcasecmp.
-# include <strings.h>  // NOLINT
-
-#elif GTEST_OS_WINDOWS_MOBILE  // We are on Windows CE.
-
-# include <windows.h>  // NOLINT
-# undef min
-
-#elif GTEST_OS_WINDOWS  // We are on Windows proper.
-
-# include <windows.h>  // NOLINT
-# undef min
-
-# include <crtdbg.h>  // NOLINT
-# include <debugapi.h>  // NOLINT
-# include <io.h>  // NOLINT
-# include <sys/timeb.h>  // NOLINT
-# include <sys/types.h>  // NOLINT
-# include <sys/stat.h>  // NOLINT
-
-# if GTEST_OS_WINDOWS_MINGW
-// MinGW has gettimeofday() but not _ftime64().
-#  define GTEST_HAS_GETTIMEOFDAY_ 1
-#  include <sys/time.h>  // NOLINT
-# endif  // GTEST_OS_WINDOWS_MINGW
-
-#else
-
-// Assume other platforms have gettimeofday().
-# define GTEST_HAS_GETTIMEOFDAY_ 1
-
-// cpplint thinks that the header is already included, so we want to
-// silence it.
-# include <sys/time.h>  // NOLINT
-# include <unistd.h>  // NOLINT
-
-#endif  // GTEST_OS_LINUX
-
-#if GTEST_HAS_EXCEPTIONS
-# include <stdexcept>
-#endif
-
-#if GTEST_CAN_STREAM_RESULTS_
-# include <arpa/inet.h>  // NOLINT
-# include <netdb.h>  // NOLINT
-# include <sys/socket.h>  // NOLINT
-# include <sys/types.h>  // NOLINT
-#endif
-
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_OS_WINDOWS
-# define vsnprintf _vsnprintf
-#endif  // GTEST_OS_WINDOWS
-
-#if GTEST_OS_MAC
-#ifndef GTEST_OS_IOS
-#include <crt_externs.h>
-#endif
-#endif
-
-#if GTEST_HAS_ABSL
-#include "absl/debugging/failure_signal_handler.h"
-#include "absl/debugging/stacktrace.h"
-#include "absl/debugging/symbolize.h"
-#include "absl/strings/str_cat.h"
-#endif  // GTEST_HAS_ABSL
-
-namespace testing {
-
-using internal::CountIf;
-using internal::ForEach;
-using internal::GetElementOr;
-using internal::Shuffle;
-
-// Constants.
-
-// A test whose test suite name or test name matches this filter is
-// disabled and not run.
-static const char kDisableTestFilter[] = "DISABLED_*:*/DISABLED_*";
-
-// A test suite whose name matches this filter is considered a death
-// test suite and will be run before test suites whose name doesn't
-// match this filter.
-static const char kDeathTestSuiteFilter[] = "*DeathTest:*DeathTest/*";
-
-// A test filter that matches everything.
-static const char kUniversalFilter[] = "*";
-
-// The default output format.
-static const char kDefaultOutputFormat[] = "xml";
-// The default output file.
-static const char kDefaultOutputFile[] = "test_detail";
-
-// The environment variable name for the test shard index.
-static const char kTestShardIndex[] = "GTEST_SHARD_INDEX";
-// The environment variable name for the total number of test shards.
-static const char kTestTotalShards[] = "GTEST_TOTAL_SHARDS";
-// The environment variable name for the test shard status file.
-static const char kTestShardStatusFile[] = "GTEST_SHARD_STATUS_FILE";
-
-namespace internal {
-
-// The text used in failure messages to indicate the start of the
-// stack trace.
-const char kStackTraceMarker[] = "\nStack trace:\n";
-
-// g_help_flag is true if and only if the --help flag or an equivalent form
-// is specified on the command line.
-bool g_help_flag = false;
-
-// Utilty function to Open File for Writing
-static FILE* OpenFileForWriting(const std::string& output_file) {
-  FILE* fileout = nullptr;
-  FilePath output_file_path(output_file);
-  FilePath output_dir(output_file_path.RemoveFileName());
-
-  if (output_dir.CreateDirectoriesRecursively()) {
-    fileout = posix::FOpen(output_file.c_str(), "w");
-  }
-  if (fileout == nullptr) {
-    GTEST_LOG_(FATAL) << "Unable to open file \"" << output_file << "\"";
-  }
-  return fileout;
-}
-
-}  // namespace internal
-
-// Bazel passes in the argument to '--test_filter' via the TESTBRIDGE_TEST_ONLY
-// environment variable.
-static const char* GetDefaultFilter() {
-  const char* const testbridge_test_only =
-      internal::posix::GetEnv("TESTBRIDGE_TEST_ONLY");
-  if (testbridge_test_only != nullptr) {
-    return testbridge_test_only;
-  }
-  return kUniversalFilter;
-}
-
-GTEST_DEFINE_bool_(
-    also_run_disabled_tests,
-    internal::BoolFromGTestEnv("also_run_disabled_tests", false),
-    "Run disabled tests too, in addition to the tests normally being run.");
-
-GTEST_DEFINE_bool_(
-    break_on_failure, internal::BoolFromGTestEnv("break_on_failure", false),
-    "True if and only if a failed assertion should be a debugger "
-    "break-point.");
-
-GTEST_DEFINE_bool_(catch_exceptions,
-                   internal::BoolFromGTestEnv("catch_exceptions", true),
-                   "True if and only if " GTEST_NAME_
-                   " should catch exceptions and treat them as test failures.");
-
-GTEST_DEFINE_string_(
-    color,
-    internal::StringFromGTestEnv("color", "auto"),
-    "Whether to use colors in the output.  Valid values: yes, no, "
-    "and auto.  'auto' means to use colors if the output is "
-    "being sent to a terminal and the TERM environment variable "
-    "is set to a terminal type that supports colors.");
-
-GTEST_DEFINE_string_(
-    filter,
-    internal::StringFromGTestEnv("filter", GetDefaultFilter()),
-    "A colon-separated list of glob (not regex) patterns "
-    "for filtering the tests to run, optionally followed by a "
-    "'-' and a : separated list of negative patterns (tests to "
-    "exclude).  A test is run if it matches one of the positive "
-    "patterns and does not match any of the negative patterns.");
-
-GTEST_DEFINE_bool_(
-    install_failure_signal_handler,
-    internal::BoolFromGTestEnv("install_failure_signal_handler", false),
-    "If true and supported on the current platform, " GTEST_NAME_ " should "
-    "install a signal handler that dumps debugging information when fatal "
-    "signals are raised.");
-
-GTEST_DEFINE_bool_(list_tests, false,
-                   "List all tests without running them.");
-
-// The net priority order after flag processing is thus:
-//   --gtest_output command line flag
-//   GTEST_OUTPUT environment variable
-//   XML_OUTPUT_FILE environment variable
-//   ''
-GTEST_DEFINE_string_(
-    output,
-    internal::StringFromGTestEnv("output",
-      internal::OutputFlagAlsoCheckEnvVar().c_str()),
-    "A format (defaults to \"xml\" but can be specified to be \"json\"), "
-    "optionally followed by a colon and an output file name or directory. "
-    "A directory is indicated by a trailing pathname separator. "
-    "Examples: \"xml:filename.xml\", \"xml::directoryname/\". "
-    "If a directory is specified, output files will be created "
-    "within that directory, with file-names based on the test "
-    "executable's name and, if necessary, made unique by adding "
-    "digits.");
-
-GTEST_DEFINE_bool_(print_time, internal::BoolFromGTestEnv("print_time", true),
-                   "True if and only if " GTEST_NAME_
-                   " should display elapsed time in text output.");
-
-GTEST_DEFINE_bool_(print_utf8, internal::BoolFromGTestEnv("print_utf8", true),
-                   "True if and only if " GTEST_NAME_
-                   " prints UTF8 characters as text.");
-
-GTEST_DEFINE_int32_(
-    random_seed,
-    internal::Int32FromGTestEnv("random_seed", 0),
-    "Random number seed to use when shuffling test orders.  Must be in range "
-    "[1, 99999], or 0 to use a seed based on the current time.");
-
-GTEST_DEFINE_int32_(
-    repeat,
-    internal::Int32FromGTestEnv("repeat", 1),
-    "How many times to repeat each test.  Specify a negative number "
-    "for repeating forever.  Useful for shaking out flaky tests.");
-
-GTEST_DEFINE_bool_(show_internal_stack_frames, false,
-                   "True if and only if " GTEST_NAME_
-                   " should include internal stack frames when "
-                   "printing test failure stack traces.");
-
-GTEST_DEFINE_bool_(shuffle, internal::BoolFromGTestEnv("shuffle", false),
-                   "True if and only if " GTEST_NAME_
-                   " should randomize tests' order on every run.");
-
-GTEST_DEFINE_int32_(
-    stack_trace_depth,
-    internal::Int32FromGTestEnv("stack_trace_depth", kMaxStackTraceDepth),
-    "The maximum number of stack frames to print when an "
-    "assertion fails.  The valid range is 0 through 100, inclusive.");
-
-GTEST_DEFINE_string_(
-    stream_result_to,
-    internal::StringFromGTestEnv("stream_result_to", ""),
-    "This flag specifies the host name and the port number on which to stream "
-    "test results. Example: \"localhost:555\". The flag is effective only on "
-    "Linux.");
-
-GTEST_DEFINE_bool_(
-    throw_on_failure,
-    internal::BoolFromGTestEnv("throw_on_failure", false),
-    "When this flag is specified, a failed assertion will throw an exception "
-    "if exceptions are enabled or exit the program with a non-zero code "
-    "otherwise. For use with an external test framework.");
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-GTEST_DEFINE_string_(
-    flagfile,
-    internal::StringFromGTestEnv("flagfile", ""),
-    "This flag specifies the flagfile to read command-line flags from.");
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-namespace internal {
-
-// Generates a random number from [0, range), using a Linear
-// Congruential Generator (LCG).  Crashes if 'range' is 0 or greater
-// than kMaxRange.
-UInt32 Random::Generate(UInt32 range) {
-  // These constants are the same as are used in glibc's rand(3).
-  // Use wider types than necessary to prevent unsigned overflow diagnostics.
-  state_ = static_cast<UInt32>(1103515245ULL*state_ + 12345U) % kMaxRange;
-
-  GTEST_CHECK_(range > 0)
-      << "Cannot generate a number in the range [0, 0).";
-  GTEST_CHECK_(range <= kMaxRange)
-      << "Generation of a number in [0, " << range << ") was requested, "
-      << "but this can only generate numbers in [0, " << kMaxRange << ").";
-
-  // Converting via modulus introduces a bit of downward bias, but
-  // it's simple, and a linear congruential generator isn't too good
-  // to begin with.
-  return state_ % range;
-}
-
-// GTestIsInitialized() returns true if and only if the user has initialized
-// Google Test.  Useful for catching the user mistake of not initializing
-// Google Test before calling RUN_ALL_TESTS().
-static bool GTestIsInitialized() { return GetArgvs().size() > 0; }
-
-// Iterates over a vector of TestSuites, keeping a running sum of the
-// results of calling a given int-returning method on each.
-// Returns the sum.
-static int SumOverTestSuiteList(const std::vector<TestSuite*>& case_list,
-                                int (TestSuite::*method)() const) {
-  int sum = 0;
-  for (size_t i = 0; i < case_list.size(); i++) {
-    sum += (case_list[i]->*method)();
-  }
-  return sum;
-}
-
-// Returns true if and only if the test suite passed.
-static bool TestSuitePassed(const TestSuite* test_suite) {
-  return test_suite->should_run() && test_suite->Passed();
-}
-
-// Returns true if and only if the test suite failed.
-static bool TestSuiteFailed(const TestSuite* test_suite) {
-  return test_suite->should_run() && test_suite->Failed();
-}
-
-// Returns true if and only if test_suite contains at least one test that
-// should run.
-static bool ShouldRunTestSuite(const TestSuite* test_suite) {
-  return test_suite->should_run();
-}
-
-// AssertHelper constructor.
-AssertHelper::AssertHelper(TestPartResult::Type type,
-                           const char* file,
-                           int line,
-                           const char* message)
-    : data_(new AssertHelperData(type, file, line, message)) {
-}
-
-AssertHelper::~AssertHelper() {
-  delete data_;
-}
-
-// Message assignment, for assertion streaming support.
-void AssertHelper::operator=(const Message& message) const {
-  UnitTest::GetInstance()->
-    AddTestPartResult(data_->type, data_->file, data_->line,
-                      AppendUserMessage(data_->message, message),
-                      UnitTest::GetInstance()->impl()
-                      ->CurrentOsStackTraceExceptTop(1)
-                      // Skips the stack frame for this function itself.
-                      );  // NOLINT
-}
-
-// A copy of all command line arguments.  Set by InitGoogleTest().
-static ::std::vector<std::string> g_argvs;
-
-::std::vector<std::string> GetArgvs() {
-#if defined(GTEST_CUSTOM_GET_ARGVS_)
-  // GTEST_CUSTOM_GET_ARGVS_() may return a container of std::string or
-  // ::string. This code converts it to the appropriate type.
-  const auto& custom = GTEST_CUSTOM_GET_ARGVS_();
-  return ::std::vector<std::string>(custom.begin(), custom.end());
-#else   // defined(GTEST_CUSTOM_GET_ARGVS_)
-  return g_argvs;
-#endif  // defined(GTEST_CUSTOM_GET_ARGVS_)
-}
-
-// Returns the current application's name, removing directory path if that
-// is present.
-FilePath GetCurrentExecutableName() {
-  FilePath result;
-
-#if GTEST_OS_WINDOWS || GTEST_OS_OS2
-  result.Set(FilePath(GetArgvs()[0]).RemoveExtension("exe"));
-#else
-  result.Set(FilePath(GetArgvs()[0]));
-#endif  // GTEST_OS_WINDOWS
-
-  return result.RemoveDirectoryName();
-}
-
-// Functions for processing the gtest_output flag.
-
-// Returns the output format, or "" for normal printed output.
-std::string UnitTestOptions::GetOutputFormat() {
-  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
-  const char* const colon = strchr(gtest_output_flag, ':');
-  return (colon == nullptr)
-             ? std::string(gtest_output_flag)
-             : std::string(gtest_output_flag,
-                           static_cast<size_t>(colon - gtest_output_flag));
-}
-
-// Returns the name of the requested output file, or the default if none
-// was explicitly specified.
-std::string UnitTestOptions::GetAbsolutePathToOutputFile() {
-  const char* const gtest_output_flag = GTEST_FLAG(output).c_str();
-
-  std::string format = GetOutputFormat();
-  if (format.empty())
-    format = std::string(kDefaultOutputFormat);
-
-  const char* const colon = strchr(gtest_output_flag, ':');
-  if (colon == nullptr)
-    return internal::FilePath::MakeFileName(
-        internal::FilePath(
-            UnitTest::GetInstance()->original_working_dir()),
-        internal::FilePath(kDefaultOutputFile), 0,
-        format.c_str()).string();
-
-  internal::FilePath output_name(colon + 1);
-  if (!output_name.IsAbsolutePath())
-    output_name = internal::FilePath::ConcatPaths(
-        internal::FilePath(UnitTest::GetInstance()->original_working_dir()),
-        internal::FilePath(colon + 1));
-
-  if (!output_name.IsDirectory())
-    return output_name.string();
-
-  internal::FilePath result(internal::FilePath::GenerateUniqueFileName(
-      output_name, internal::GetCurrentExecutableName(),
-      GetOutputFormat().c_str()));
-  return result.string();
-}
-
-// Returns true if and only if the wildcard pattern matches the string.
-// The first ':' or '\0' character in pattern marks the end of it.
-//
-// This recursive algorithm isn't very efficient, but is clear and
-// works well enough for matching test names, which are short.
-bool UnitTestOptions::PatternMatchesString(const char *pattern,
-                                           const char *str) {
-  switch (*pattern) {
-    case '\0':
-    case ':':  // Either ':' or '\0' marks the end of the pattern.
-      return *str == '\0';
-    case '?':  // Matches any single character.
-      return *str != '\0' && PatternMatchesString(pattern + 1, str + 1);
-    case '*':  // Matches any string (possibly empty) of characters.
-      return (*str != '\0' && PatternMatchesString(pattern, str + 1)) ||
-          PatternMatchesString(pattern + 1, str);
-    default:  // Non-special character.  Matches itself.
-      return *pattern == *str &&
-          PatternMatchesString(pattern + 1, str + 1);
-  }
-}
-
-bool UnitTestOptions::MatchesFilter(
-    const std::string& name, const char* filter) {
-  const char *cur_pattern = filter;
-  for (;;) {
-    if (PatternMatchesString(cur_pattern, name.c_str())) {
-      return true;
-    }
-
-    // Finds the next pattern in the filter.
-    cur_pattern = strchr(cur_pattern, ':');
-
-    // Returns if no more pattern can be found.
-    if (cur_pattern == nullptr) {
-      return false;
-    }
-
-    // Skips the pattern separater (the ':' character).
-    cur_pattern++;
-  }
-}
-
-// Returns true if and only if the user-specified filter matches the test
-// suite name and the test name.
-bool UnitTestOptions::FilterMatchesTest(const std::string& test_suite_name,
-                                        const std::string& test_name) {
-  const std::string& full_name = test_suite_name + "." + test_name.c_str();
-
-  // Split --gtest_filter at '-', if there is one, to separate into
-  // positive filter and negative filter portions
-  const char* const p = GTEST_FLAG(filter).c_str();
-  const char* const dash = strchr(p, '-');
-  std::string positive;
-  std::string negative;
-  if (dash == nullptr) {
-    positive = GTEST_FLAG(filter).c_str();  // Whole string is a positive filter
-    negative = "";
-  } else {
-    positive = std::string(p, dash);   // Everything up to the dash
-    negative = std::string(dash + 1);  // Everything after the dash
-    if (positive.empty()) {
-      // Treat '-test1' as the same as '*-test1'
-      positive = kUniversalFilter;
-    }
-  }
-
-  // A filter is a colon-separated list of patterns.  It matches a
-  // test if any pattern in it matches the test.
-  return (MatchesFilter(full_name, positive.c_str()) &&
-          !MatchesFilter(full_name, negative.c_str()));
-}
-
-#if GTEST_HAS_SEH
-// Returns EXCEPTION_EXECUTE_HANDLER if Google Test should handle the
-// given SEH exception, or EXCEPTION_CONTINUE_SEARCH otherwise.
-// This function is useful as an __except condition.
-int UnitTestOptions::GTestShouldProcessSEH(DWORD exception_code) {
-  // Google Test should handle a SEH exception if:
-  //   1. the user wants it to, AND
-  //   2. this is not a breakpoint exception, AND
-  //   3. this is not a C++ exception (VC++ implements them via SEH,
-  //      apparently).
-  //
-  // SEH exception code for C++ exceptions.
-  // (see http://support.microsoft.com/kb/185294 for more information).
-  const DWORD kCxxExceptionCode = 0xe06d7363;
-
-  bool should_handle = true;
-
-  if (!GTEST_FLAG(catch_exceptions))
-    should_handle = false;
-  else if (exception_code == EXCEPTION_BREAKPOINT)
-    should_handle = false;
-  else if (exception_code == kCxxExceptionCode)
-    should_handle = false;
-
-  return should_handle ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
-}
-#endif  // GTEST_HAS_SEH
-
-}  // namespace internal
-
-// The c'tor sets this object as the test part result reporter used by
-// Google Test.  The 'result' parameter specifies where to report the
-// results. Intercepts only failures from the current thread.
-ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
-    TestPartResultArray* result)
-    : intercept_mode_(INTERCEPT_ONLY_CURRENT_THREAD),
-      result_(result) {
-  Init();
-}
-
-// The c'tor sets this object as the test part result reporter used by
-// Google Test.  The 'result' parameter specifies where to report the
-// results.
-ScopedFakeTestPartResultReporter::ScopedFakeTestPartResultReporter(
-    InterceptMode intercept_mode, TestPartResultArray* result)
-    : intercept_mode_(intercept_mode),
-      result_(result) {
-  Init();
-}
-
-void ScopedFakeTestPartResultReporter::Init() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
-    old_reporter_ = impl->GetGlobalTestPartResultReporter();
-    impl->SetGlobalTestPartResultReporter(this);
-  } else {
-    old_reporter_ = impl->GetTestPartResultReporterForCurrentThread();
-    impl->SetTestPartResultReporterForCurrentThread(this);
-  }
-}
-
-// The d'tor restores the test part result reporter used by Google Test
-// before.
-ScopedFakeTestPartResultReporter::~ScopedFakeTestPartResultReporter() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  if (intercept_mode_ == INTERCEPT_ALL_THREADS) {
-    impl->SetGlobalTestPartResultReporter(old_reporter_);
-  } else {
-    impl->SetTestPartResultReporterForCurrentThread(old_reporter_);
-  }
-}
-
-// Increments the test part result count and remembers the result.
-// This method is from the TestPartResultReporterInterface interface.
-void ScopedFakeTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  result_->Append(result);
-}
-
-namespace internal {
-
-// Returns the type ID of ::testing::Test.  We should always call this
-// instead of GetTypeId< ::testing::Test>() to get the type ID of
-// testing::Test.  This is to work around a suspected linker bug when
-// using Google Test as a framework on Mac OS X.  The bug causes
-// GetTypeId< ::testing::Test>() to return different values depending
-// on whether the call is from the Google Test framework itself or
-// from user test code.  GetTestTypeId() is guaranteed to always
-// return the same value, as it always calls GetTypeId<>() from the
-// gtest.cc, which is within the Google Test framework.
-TypeId GetTestTypeId() {
-  return GetTypeId<Test>();
-}
-
-// The value of GetTestTypeId() as seen from within the Google Test
-// library.  This is solely for testing GetTestTypeId().
-extern const TypeId kTestTypeIdInGoogleTest = GetTestTypeId();
-
-// This predicate-formatter checks that 'results' contains a test part
-// failure of the given type and that the failure message contains the
-// given substring.
-static AssertionResult HasOneFailure(const char* /* results_expr */,
-                                     const char* /* type_expr */,
-                                     const char* /* substr_expr */,
-                                     const TestPartResultArray& results,
-                                     TestPartResult::Type type,
-                                     const std::string& substr) {
-  const std::string expected(type == TestPartResult::kFatalFailure ?
-                        "1 fatal failure" :
-                        "1 non-fatal failure");
-  Message msg;
-  if (results.size() != 1) {
-    msg << "Expected: " << expected << "\n"
-        << "  Actual: " << results.size() << " failures";
-    for (int i = 0; i < results.size(); i++) {
-      msg << "\n" << results.GetTestPartResult(i);
-    }
-    return AssertionFailure() << msg;
-  }
-
-  const TestPartResult& r = results.GetTestPartResult(0);
-  if (r.type() != type) {
-    return AssertionFailure() << "Expected: " << expected << "\n"
-                              << "  Actual:\n"
-                              << r;
-  }
-
-  if (strstr(r.message(), substr.c_str()) == nullptr) {
-    return AssertionFailure() << "Expected: " << expected << " containing \""
-                              << substr << "\"\n"
-                              << "  Actual:\n"
-                              << r;
-  }
-
-  return AssertionSuccess();
-}
-
-// The constructor of SingleFailureChecker remembers where to look up
-// test part results, what type of failure we expect, and what
-// substring the failure message should contain.
-SingleFailureChecker::SingleFailureChecker(const TestPartResultArray* results,
-                                           TestPartResult::Type type,
-                                           const std::string& substr)
-    : results_(results), type_(type), substr_(substr) {}
-
-// The destructor of SingleFailureChecker verifies that the given
-// TestPartResultArray contains exactly one failure that has the given
-// type and contains the given substring.  If that's not the case, a
-// non-fatal failure will be generated.
-SingleFailureChecker::~SingleFailureChecker() {
-  EXPECT_PRED_FORMAT3(HasOneFailure, *results_, type_, substr_);
-}
-
-DefaultGlobalTestPartResultReporter::DefaultGlobalTestPartResultReporter(
-    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
-
-void DefaultGlobalTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  unit_test_->current_test_result()->AddTestPartResult(result);
-  unit_test_->listeners()->repeater()->OnTestPartResult(result);
-}
-
-DefaultPerThreadTestPartResultReporter::DefaultPerThreadTestPartResultReporter(
-    UnitTestImpl* unit_test) : unit_test_(unit_test) {}
-
-void DefaultPerThreadTestPartResultReporter::ReportTestPartResult(
-    const TestPartResult& result) {
-  unit_test_->GetGlobalTestPartResultReporter()->ReportTestPartResult(result);
-}
-
-// Returns the global test part result reporter.
-TestPartResultReporterInterface*
-UnitTestImpl::GetGlobalTestPartResultReporter() {
-  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
-  return global_test_part_result_repoter_;
-}
-
-// Sets the global test part result reporter.
-void UnitTestImpl::SetGlobalTestPartResultReporter(
-    TestPartResultReporterInterface* reporter) {
-  internal::MutexLock lock(&global_test_part_result_reporter_mutex_);
-  global_test_part_result_repoter_ = reporter;
-}
-
-// Returns the test part result reporter for the current thread.
-TestPartResultReporterInterface*
-UnitTestImpl::GetTestPartResultReporterForCurrentThread() {
-  return per_thread_test_part_result_reporter_.get();
-}
-
-// Sets the test part result reporter for the current thread.
-void UnitTestImpl::SetTestPartResultReporterForCurrentThread(
-    TestPartResultReporterInterface* reporter) {
-  per_thread_test_part_result_reporter_.set(reporter);
-}
-
-// Gets the number of successful test suites.
-int UnitTestImpl::successful_test_suite_count() const {
-  return CountIf(test_suites_, TestSuitePassed);
-}
-
-// Gets the number of failed test suites.
-int UnitTestImpl::failed_test_suite_count() const {
-  return CountIf(test_suites_, TestSuiteFailed);
-}
-
-// Gets the number of all test suites.
-int UnitTestImpl::total_test_suite_count() const {
-  return static_cast<int>(test_suites_.size());
-}
-
-// Gets the number of all test suites that contain at least one test
-// that should run.
-int UnitTestImpl::test_suite_to_run_count() const {
-  return CountIf(test_suites_, ShouldRunTestSuite);
-}
-
-// Gets the number of successful tests.
-int UnitTestImpl::successful_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::successful_test_count);
-}
-
-// Gets the number of skipped tests.
-int UnitTestImpl::skipped_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::skipped_test_count);
-}
-
-// Gets the number of failed tests.
-int UnitTestImpl::failed_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::failed_test_count);
-}
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int UnitTestImpl::reportable_disabled_test_count() const {
-  return SumOverTestSuiteList(test_suites_,
-                              &TestSuite::reportable_disabled_test_count);
-}
-
-// Gets the number of disabled tests.
-int UnitTestImpl::disabled_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::disabled_test_count);
-}
-
-// Gets the number of tests to be printed in the XML report.
-int UnitTestImpl::reportable_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::reportable_test_count);
-}
-
-// Gets the number of all tests.
-int UnitTestImpl::total_test_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::total_test_count);
-}
-
-// Gets the number of tests that should run.
-int UnitTestImpl::test_to_run_count() const {
-  return SumOverTestSuiteList(test_suites_, &TestSuite::test_to_run_count);
-}
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// CurrentOsStackTraceExceptTop(1), Foo() will be included in the
-// trace but Bar() and CurrentOsStackTraceExceptTop() won't.
-std::string UnitTestImpl::CurrentOsStackTraceExceptTop(int skip_count) {
-  return os_stack_trace_getter()->CurrentStackTrace(
-      static_cast<int>(GTEST_FLAG(stack_trace_depth)),
-      skip_count + 1
-      // Skips the user-specified number of frames plus this function
-      // itself.
-      );  // NOLINT
-}
-
-// Returns the current time in milliseconds.
-TimeInMillis GetTimeInMillis() {
-#if GTEST_OS_WINDOWS_MOBILE || defined(__BORLANDC__)
-  // Difference between 1970-01-01 and 1601-01-01 in milliseconds.
-  // http://analogous.blogspot.com/2005/04/epoch.html
-  const TimeInMillis kJavaEpochToWinFileTimeDelta =
-    static_cast<TimeInMillis>(116444736UL) * 100000UL;
-  const DWORD kTenthMicrosInMilliSecond = 10000;
-
-  SYSTEMTIME now_systime;
-  FILETIME now_filetime;
-  ULARGE_INTEGER now_int64;
-  GetSystemTime(&now_systime);
-  if (SystemTimeToFileTime(&now_systime, &now_filetime)) {
-    now_int64.LowPart = now_filetime.dwLowDateTime;
-    now_int64.HighPart = now_filetime.dwHighDateTime;
-    now_int64.QuadPart = (now_int64.QuadPart / kTenthMicrosInMilliSecond) -
-      kJavaEpochToWinFileTimeDelta;
-    return now_int64.QuadPart;
-  }
-  return 0;
-#elif GTEST_OS_WINDOWS && !GTEST_HAS_GETTIMEOFDAY_
-  __timeb64 now;
-
-  // MSVC 8 deprecates _ftime64(), so we want to suppress warning 4996
-  // (deprecated function) there.
-  GTEST_DISABLE_MSC_DEPRECATED_PUSH_()
-  _ftime64(&now);
-  GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-  return static_cast<TimeInMillis>(now.time) * 1000 + now.millitm;
-#elif GTEST_HAS_GETTIMEOFDAY_
-  struct timeval now;
-  gettimeofday(&now, nullptr);
-  return static_cast<TimeInMillis>(now.tv_sec) * 1000 + now.tv_usec / 1000;
-#else
-# error "Don't know how to get the current time on your system."
-#endif
-}
-
-// Utilities
-
-// class String.
-
-#if GTEST_OS_WINDOWS_MOBILE
-// Creates a UTF-16 wide string from the given ANSI string, allocating
-// memory using new. The caller is responsible for deleting the return
-// value using delete[]. Returns the wide string, or NULL if the
-// input is NULL.
-LPCWSTR String::AnsiToUtf16(const char* ansi) {
-  if (!ansi) return nullptr;
-  const int length = strlen(ansi);
-  const int unicode_length =
-      MultiByteToWideChar(CP_ACP, 0, ansi, length, nullptr, 0);
-  WCHAR* unicode = new WCHAR[unicode_length + 1];
-  MultiByteToWideChar(CP_ACP, 0, ansi, length,
-                      unicode, unicode_length);
-  unicode[unicode_length] = 0;
-  return unicode;
-}
-
-// Creates an ANSI string from the given wide string, allocating
-// memory using new. The caller is responsible for deleting the return
-// value using delete[]. Returns the ANSI string, or NULL if the
-// input is NULL.
-const char* String::Utf16ToAnsi(LPCWSTR utf16_str)  {
-  if (!utf16_str) return nullptr;
-  const int ansi_length = WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, nullptr,
-                                              0, nullptr, nullptr);
-  char* ansi = new char[ansi_length + 1];
-  WideCharToMultiByte(CP_ACP, 0, utf16_str, -1, ansi, ansi_length, nullptr,
-                      nullptr);
-  ansi[ansi_length] = 0;
-  return ansi;
-}
-
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-// Compares two C strings.  Returns true if and only if they have the same
-// content.
-//
-// Unlike strcmp(), this function can handle NULL argument(s).  A NULL
-// C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::CStringEquals(const char * lhs, const char * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-  return strcmp(lhs, rhs) == 0;
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Converts an array of wide chars to a narrow string using the UTF-8
-// encoding, and streams the result to the given Message object.
-static void StreamWideCharsToMessage(const wchar_t* wstr, size_t length,
-                                     Message* msg) {
-  for (size_t i = 0; i != length; ) {  // NOLINT
-    if (wstr[i] != L'\0') {
-      *msg << WideStringToUtf8(wstr + i, static_cast<int>(length - i));
-      while (i != length && wstr[i] != L'\0')
-        i++;
-    } else {
-      *msg << '\0';
-      i++;
-    }
-  }
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-void SplitString(const ::std::string& str, char delimiter,
-                 ::std::vector< ::std::string>* dest) {
-  ::std::vector< ::std::string> parsed;
-  ::std::string::size_type pos = 0;
-  while (::testing::internal::AlwaysTrue()) {
-    const ::std::string::size_type colon = str.find(delimiter, pos);
-    if (colon == ::std::string::npos) {
-      parsed.push_back(str.substr(pos));
-      break;
-    } else {
-      parsed.push_back(str.substr(pos, colon - pos));
-      pos = colon + 1;
-    }
-  }
-  dest->swap(parsed);
-}
-
-}  // namespace internal
-
-// Constructs an empty Message.
-// We allocate the stringstream separately because otherwise each use of
-// ASSERT/EXPECT in a procedure adds over 200 bytes to the procedure's
-// stack frame leading to huge stack frames in some cases; gcc does not reuse
-// the stack space.
-Message::Message() : ss_(new ::std::stringstream) {
-  // By default, we want there to be enough precision when printing
-  // a double to a Message.
-  *ss_ << std::setprecision(std::numeric_limits<double>::digits10 + 2);
-}
-
-// These two overloads allow streaming a wide C string to a Message
-// using the UTF-8 encoding.
-Message& Message::operator <<(const wchar_t* wide_c_str) {
-  return *this << internal::String::ShowWideCString(wide_c_str);
-}
-Message& Message::operator <<(wchar_t* wide_c_str) {
-  return *this << internal::String::ShowWideCString(wide_c_str);
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Converts the given wide string to a narrow string using the UTF-8
-// encoding, and streams the result to this Message object.
-Message& Message::operator <<(const ::std::wstring& wstr) {
-  internal::StreamWideCharsToMessage(wstr.c_str(), wstr.length(), this);
-  return *this;
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Gets the text streamed to this object so far as an std::string.
-// Each '\0' character in the buffer is replaced with "\\0".
-std::string Message::GetString() const {
-  return internal::StringStreamToString(ss_.get());
-}
-
-// AssertionResult constructors.
-// Used in EXPECT_TRUE/FALSE(assertion_result).
-AssertionResult::AssertionResult(const AssertionResult& other)
-    : success_(other.success_),
-      message_(other.message_.get() != nullptr
-                   ? new ::std::string(*other.message_)
-                   : static_cast< ::std::string*>(nullptr)) {}
-
-// Swaps two AssertionResults.
-void AssertionResult::swap(AssertionResult& other) {
-  using std::swap;
-  swap(success_, other.success_);
-  swap(message_, other.message_);
-}
-
-// Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
-AssertionResult AssertionResult::operator!() const {
-  AssertionResult negation(!success_);
-  if (message_.get() != nullptr) negation << *message_;
-  return negation;
-}
-
-// Makes a successful assertion result.
-AssertionResult AssertionSuccess() {
-  return AssertionResult(true);
-}
-
-// Makes a failed assertion result.
-AssertionResult AssertionFailure() {
-  return AssertionResult(false);
-}
-
-// Makes a failed assertion result with the given failure message.
-// Deprecated; use AssertionFailure() << message.
-AssertionResult AssertionFailure(const Message& message) {
-  return AssertionFailure() << message;
-}
-
-namespace internal {
-
-namespace edit_distance {
-std::vector<EditType> CalculateOptimalEdits(const std::vector<size_t>& left,
-                                            const std::vector<size_t>& right) {
-  std::vector<std::vector<double> > costs(
-      left.size() + 1, std::vector<double>(right.size() + 1));
-  std::vector<std::vector<EditType> > best_move(
-      left.size() + 1, std::vector<EditType>(right.size() + 1));
-
-  // Populate for empty right.
-  for (size_t l_i = 0; l_i < costs.size(); ++l_i) {
-    costs[l_i][0] = static_cast<double>(l_i);
-    best_move[l_i][0] = kRemove;
-  }
-  // Populate for empty left.
-  for (size_t r_i = 1; r_i < costs[0].size(); ++r_i) {
-    costs[0][r_i] = static_cast<double>(r_i);
-    best_move[0][r_i] = kAdd;
-  }
-
-  for (size_t l_i = 0; l_i < left.size(); ++l_i) {
-    for (size_t r_i = 0; r_i < right.size(); ++r_i) {
-      if (left[l_i] == right[r_i]) {
-        // Found a match. Consume it.
-        costs[l_i + 1][r_i + 1] = costs[l_i][r_i];
-        best_move[l_i + 1][r_i + 1] = kMatch;
-        continue;
-      }
-
-      const double add = costs[l_i + 1][r_i];
-      const double remove = costs[l_i][r_i + 1];
-      const double replace = costs[l_i][r_i];
-      if (add < remove && add < replace) {
-        costs[l_i + 1][r_i + 1] = add + 1;
-        best_move[l_i + 1][r_i + 1] = kAdd;
-      } else if (remove < add && remove < replace) {
-        costs[l_i + 1][r_i + 1] = remove + 1;
-        best_move[l_i + 1][r_i + 1] = kRemove;
-      } else {
-        // We make replace a little more expensive than add/remove to lower
-        // their priority.
-        costs[l_i + 1][r_i + 1] = replace + 1.00001;
-        best_move[l_i + 1][r_i + 1] = kReplace;
-      }
-    }
-  }
-
-  // Reconstruct the best path. We do it in reverse order.
-  std::vector<EditType> best_path;
-  for (size_t l_i = left.size(), r_i = right.size(); l_i > 0 || r_i > 0;) {
-    EditType move = best_move[l_i][r_i];
-    best_path.push_back(move);
-    l_i -= move != kAdd;
-    r_i -= move != kRemove;
-  }
-  std::reverse(best_path.begin(), best_path.end());
-  return best_path;
-}
-
-namespace {
-
-// Helper class to convert string into ids with deduplication.
-class InternalStrings {
- public:
-  size_t GetId(const std::string& str) {
-    IdMap::iterator it = ids_.find(str);
-    if (it != ids_.end()) return it->second;
-    size_t id = ids_.size();
-    return ids_[str] = id;
-  }
-
- private:
-  typedef std::map<std::string, size_t> IdMap;
-  IdMap ids_;
-};
-
-}  // namespace
-
-std::vector<EditType> CalculateOptimalEdits(
-    const std::vector<std::string>& left,
-    const std::vector<std::string>& right) {
-  std::vector<size_t> left_ids, right_ids;
-  {
-    InternalStrings intern_table;
-    for (size_t i = 0; i < left.size(); ++i) {
-      left_ids.push_back(intern_table.GetId(left[i]));
-    }
-    for (size_t i = 0; i < right.size(); ++i) {
-      right_ids.push_back(intern_table.GetId(right[i]));
-    }
-  }
-  return CalculateOptimalEdits(left_ids, right_ids);
-}
-
-namespace {
-
-// Helper class that holds the state for one hunk and prints it out to the
-// stream.
-// It reorders adds/removes when possible to group all removes before all
-// adds. It also adds the hunk header before printint into the stream.
-class Hunk {
- public:
-  Hunk(size_t left_start, size_t right_start)
-      : left_start_(left_start),
-        right_start_(right_start),
-        adds_(),
-        removes_(),
-        common_() {}
-
-  void PushLine(char edit, const char* line) {
-    switch (edit) {
-      case ' ':
-        ++common_;
-        FlushEdits();
-        hunk_.push_back(std::make_pair(' ', line));
-        break;
-      case '-':
-        ++removes_;
-        hunk_removes_.push_back(std::make_pair('-', line));
-        break;
-      case '+':
-        ++adds_;
-        hunk_adds_.push_back(std::make_pair('+', line));
-        break;
-    }
-  }
-
-  void PrintTo(std::ostream* os) {
-    PrintHeader(os);
-    FlushEdits();
-    for (std::list<std::pair<char, const char*> >::const_iterator it =
-             hunk_.begin();
-         it != hunk_.end(); ++it) {
-      *os << it->first << it->second << "\n";
-    }
-  }
-
-  bool has_edits() const { return adds_ || removes_; }
-
- private:
-  void FlushEdits() {
-    hunk_.splice(hunk_.end(), hunk_removes_);
-    hunk_.splice(hunk_.end(), hunk_adds_);
-  }
-
-  // Print a unified diff header for one hunk.
-  // The format is
-  //   "@@ -<left_start>,<left_length> +<right_start>,<right_length> @@"
-  // where the left/right parts are omitted if unnecessary.
-  void PrintHeader(std::ostream* ss) const {
-    *ss << "@@ ";
-    if (removes_) {
-      *ss << "-" << left_start_ << "," << (removes_ + common_);
-    }
-    if (removes_ && adds_) {
-      *ss << " ";
-    }
-    if (adds_) {
-      *ss << "+" << right_start_ << "," << (adds_ + common_);
-    }
-    *ss << " @@\n";
-  }
-
-  size_t left_start_, right_start_;
-  size_t adds_, removes_, common_;
-  std::list<std::pair<char, const char*> > hunk_, hunk_adds_, hunk_removes_;
-};
-
-}  // namespace
-
-// Create a list of diff hunks in Unified diff format.
-// Each hunk has a header generated by PrintHeader above plus a body with
-// lines prefixed with ' ' for no change, '-' for deletion and '+' for
-// addition.
-// 'context' represents the desired unchanged prefix/suffix around the diff.
-// If two hunks are close enough that their contexts overlap, then they are
-// joined into one hunk.
-std::string CreateUnifiedDiff(const std::vector<std::string>& left,
-                              const std::vector<std::string>& right,
-                              size_t context) {
-  const std::vector<EditType> edits = CalculateOptimalEdits(left, right);
-
-  size_t l_i = 0, r_i = 0, edit_i = 0;
-  std::stringstream ss;
-  while (edit_i < edits.size()) {
-    // Find first edit.
-    while (edit_i < edits.size() && edits[edit_i] == kMatch) {
-      ++l_i;
-      ++r_i;
-      ++edit_i;
-    }
-
-    // Find the first line to include in the hunk.
-    const size_t prefix_context = std::min(l_i, context);
-    Hunk hunk(l_i - prefix_context + 1, r_i - prefix_context + 1);
-    for (size_t i = prefix_context; i > 0; --i) {
-      hunk.PushLine(' ', left[l_i - i].c_str());
-    }
-
-    // Iterate the edits until we found enough suffix for the hunk or the input
-    // is over.
-    size_t n_suffix = 0;
-    for (; edit_i < edits.size(); ++edit_i) {
-      if (n_suffix >= context) {
-        // Continue only if the next hunk is very close.
-        auto it = edits.begin() + static_cast<int>(edit_i);
-        while (it != edits.end() && *it == kMatch) ++it;
-        if (it == edits.end() ||
-            static_cast<size_t>(it - edits.begin()) - edit_i >= context) {
-          // There is no next edit or it is too far away.
-          break;
-        }
-      }
-
-      EditType edit = edits[edit_i];
-      // Reset count when a non match is found.
-      n_suffix = edit == kMatch ? n_suffix + 1 : 0;
-
-      if (edit == kMatch || edit == kRemove || edit == kReplace) {
-        hunk.PushLine(edit == kMatch ? ' ' : '-', left[l_i].c_str());
-      }
-      if (edit == kAdd || edit == kReplace) {
-        hunk.PushLine('+', right[r_i].c_str());
-      }
-
-      // Advance indices, depending on edit type.
-      l_i += edit != kAdd;
-      r_i += edit != kRemove;
-    }
-
-    if (!hunk.has_edits()) {
-      // We are done. We don't want this hunk.
-      break;
-    }
-
-    hunk.PrintTo(&ss);
-  }
-  return ss.str();
-}
-
-}  // namespace edit_distance
-
-namespace {
-
-// The string representation of the values received in EqFailure() are already
-// escaped. Split them on escaped '\n' boundaries. Leave all other escaped
-// characters the same.
-std::vector<std::string> SplitEscapedString(const std::string& str) {
-  std::vector<std::string> lines;
-  size_t start = 0, end = str.size();
-  if (end > 2 && str[0] == '"' && str[end - 1] == '"') {
-    ++start;
-    --end;
-  }
-  bool escaped = false;
-  for (size_t i = start; i + 1 < end; ++i) {
-    if (escaped) {
-      escaped = false;
-      if (str[i] == 'n') {
-        lines.push_back(str.substr(start, i - start - 1));
-        start = i + 1;
-      }
-    } else {
-      escaped = str[i] == '\\';
-    }
-  }
-  lines.push_back(str.substr(start, end - start));
-  return lines;
-}
-
-}  // namespace
-
-// Constructs and returns the message for an equality assertion
-// (e.g. ASSERT_EQ, EXPECT_STREQ, etc) failure.
-//
-// The first four parameters are the expressions used in the assertion
-// and their values, as strings.  For example, for ASSERT_EQ(foo, bar)
-// where foo is 5 and bar is 6, we have:
-//
-//   lhs_expression: "foo"
-//   rhs_expression: "bar"
-//   lhs_value:      "5"
-//   rhs_value:      "6"
-//
-// The ignoring_case parameter is true if and only if the assertion is a
-// *_STRCASEEQ*.  When it's true, the string "Ignoring case" will
-// be inserted into the message.
-AssertionResult EqFailure(const char* lhs_expression,
-                          const char* rhs_expression,
-                          const std::string& lhs_value,
-                          const std::string& rhs_value,
-                          bool ignoring_case) {
-  Message msg;
-  msg << "Expected equality of these values:";
-  msg << "\n  " << lhs_expression;
-  if (lhs_value != lhs_expression) {
-    msg << "\n    Which is: " << lhs_value;
-  }
-  msg << "\n  " << rhs_expression;
-  if (rhs_value != rhs_expression) {
-    msg << "\n    Which is: " << rhs_value;
-  }
-
-  if (ignoring_case) {
-    msg << "\nIgnoring case";
-  }
-
-  if (!lhs_value.empty() && !rhs_value.empty()) {
-    const std::vector<std::string> lhs_lines =
-        SplitEscapedString(lhs_value);
-    const std::vector<std::string> rhs_lines =
-        SplitEscapedString(rhs_value);
-    if (lhs_lines.size() > 1 || rhs_lines.size() > 1) {
-      msg << "\nWith diff:\n"
-          << edit_distance::CreateUnifiedDiff(lhs_lines, rhs_lines);
-    }
-  }
-
-  return AssertionFailure() << msg;
-}
-
-// Constructs a failure message for Boolean assertions such as EXPECT_TRUE.
-std::string GetBoolAssertionFailureMessage(
-    const AssertionResult& assertion_result,
-    const char* expression_text,
-    const char* actual_predicate_value,
-    const char* expected_predicate_value) {
-  const char* actual_message = assertion_result.message();
-  Message msg;
-  msg << "Value of: " << expression_text
-      << "\n  Actual: " << actual_predicate_value;
-  if (actual_message[0] != '\0')
-    msg << " (" << actual_message << ")";
-  msg << "\nExpected: " << expected_predicate_value;
-  return msg.GetString();
-}
-
-// Helper function for implementing ASSERT_NEAR.
-AssertionResult DoubleNearPredFormat(const char* expr1,
-                                     const char* expr2,
-                                     const char* abs_error_expr,
-                                     double val1,
-                                     double val2,
-                                     double abs_error) {
-  const double diff = fabs(val1 - val2);
-  if (diff <= abs_error) return AssertionSuccess();
-
-  return AssertionFailure()
-      << "The difference between " << expr1 << " and " << expr2
-      << " is " << diff << ", which exceeds " << abs_error_expr << ", where\n"
-      << expr1 << " evaluates to " << val1 << ",\n"
-      << expr2 << " evaluates to " << val2 << ", and\n"
-      << abs_error_expr << " evaluates to " << abs_error << ".";
-}
-
-
-// Helper template for implementing FloatLE() and DoubleLE().
-template <typename RawType>
-AssertionResult FloatingPointLE(const char* expr1,
-                                const char* expr2,
-                                RawType val1,
-                                RawType val2) {
-  // Returns success if val1 is less than val2,
-  if (val1 < val2) {
-    return AssertionSuccess();
-  }
-
-  // or if val1 is almost equal to val2.
-  const FloatingPoint<RawType> lhs(val1), rhs(val2);
-  if (lhs.AlmostEquals(rhs)) {
-    return AssertionSuccess();
-  }
-
-  // Note that the above two checks will both fail if either val1 or
-  // val2 is NaN, as the IEEE floating-point standard requires that
-  // any predicate involving a NaN must return false.
-
-  ::std::stringstream val1_ss;
-  val1_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-          << val1;
-
-  ::std::stringstream val2_ss;
-  val2_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
-          << val2;
-
-  return AssertionFailure()
-      << "Expected: (" << expr1 << ") <= (" << expr2 << ")\n"
-      << "  Actual: " << StringStreamToString(&val1_ss) << " vs "
-      << StringStreamToString(&val2_ss);
-}
-
-}  // namespace internal
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-AssertionResult FloatLE(const char* expr1, const char* expr2,
-                        float val1, float val2) {
-  return internal::FloatingPointLE<float>(expr1, expr2, val1, val2);
-}
-
-// Asserts that val1 is less than, or almost equal to, val2.  Fails
-// otherwise.  In particular, it fails if either val1 or val2 is NaN.
-AssertionResult DoubleLE(const char* expr1, const char* expr2,
-                         double val1, double val2) {
-  return internal::FloatingPointLE<double>(expr1, expr2, val1, val2);
-}
-
-namespace internal {
-
-// The helper function for {ASSERT|EXPECT}_EQ with int or enum
-// arguments.
-AssertionResult CmpHelperEQ(const char* lhs_expression,
-                            const char* rhs_expression,
-                            BiggestInt lhs,
-                            BiggestInt rhs) {
-  if (lhs == rhs) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   FormatForComparisonFailureMessage(lhs, rhs),
-                   FormatForComparisonFailureMessage(rhs, lhs),
-                   false);
-}
-
-// A macro for implementing the helper functions needed to implement
-// ASSERT_?? and EXPECT_?? with integer or enum arguments.  It is here
-// just to avoid copy-and-paste of similar code.
-#define GTEST_IMPL_CMP_HELPER_(op_name, op)\
-AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
-                                   BiggestInt val1, BiggestInt val2) {\
-  if (val1 op val2) {\
-    return AssertionSuccess();\
-  } else {\
-    return AssertionFailure() \
-        << "Expected: (" << expr1 << ") " #op " (" << expr2\
-        << "), actual: " << FormatForComparisonFailureMessage(val1, val2)\
-        << " vs " << FormatForComparisonFailureMessage(val2, val1);\
-  }\
-}
-
-// Implements the helper function for {ASSERT|EXPECT}_NE with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(NE, !=)
-// Implements the helper function for {ASSERT|EXPECT}_LE with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(LE, <=)
-// Implements the helper function for {ASSERT|EXPECT}_LT with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(LT, < )
-// Implements the helper function for {ASSERT|EXPECT}_GE with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(GE, >=)
-// Implements the helper function for {ASSERT|EXPECT}_GT with int or
-// enum arguments.
-GTEST_IMPL_CMP_HELPER_(GT, > )
-
-#undef GTEST_IMPL_CMP_HELPER_
-
-// The helper function for {ASSERT|EXPECT}_STREQ.
-AssertionResult CmpHelperSTREQ(const char* lhs_expression,
-                               const char* rhs_expression,
-                               const char* lhs,
-                               const char* rhs) {
-  if (String::CStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   false);
-}
-
-// The helper function for {ASSERT|EXPECT}_STRCASEEQ.
-AssertionResult CmpHelperSTRCASEEQ(const char* lhs_expression,
-                                   const char* rhs_expression,
-                                   const char* lhs,
-                                   const char* rhs) {
-  if (String::CaseInsensitiveCStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   true);
-}
-
-// The helper function for {ASSERT|EXPECT}_STRNE.
-AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                               const char* s2_expression,
-                               const char* s1,
-                               const char* s2) {
-  if (!String::CStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  } else {
-    return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
-                              << s2_expression << "), actual: \""
-                              << s1 << "\" vs \"" << s2 << "\"";
-  }
-}
-
-// The helper function for {ASSERT|EXPECT}_STRCASENE.
-AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
-                                   const char* s2_expression,
-                                   const char* s1,
-                                   const char* s2) {
-  if (!String::CaseInsensitiveCStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  } else {
-    return AssertionFailure()
-        << "Expected: (" << s1_expression << ") != ("
-        << s2_expression << ") (ignoring case), actual: \""
-        << s1 << "\" vs \"" << s2 << "\"";
-  }
-}
-
-}  // namespace internal
-
-namespace {
-
-// Helper functions for implementing IsSubString() and IsNotSubstring().
-
-// This group of overloaded functions return true if and only if needle
-// is a substring of haystack.  NULL is considered a substring of
-// itself only.
-
-bool IsSubstringPred(const char* needle, const char* haystack) {
-  if (needle == nullptr || haystack == nullptr) return needle == haystack;
-
-  return strstr(haystack, needle) != nullptr;
-}
-
-bool IsSubstringPred(const wchar_t* needle, const wchar_t* haystack) {
-  if (needle == nullptr || haystack == nullptr) return needle == haystack;
-
-  return wcsstr(haystack, needle) != nullptr;
-}
-
-// StringType here can be either ::std::string or ::std::wstring.
-template <typename StringType>
-bool IsSubstringPred(const StringType& needle,
-                     const StringType& haystack) {
-  return haystack.find(needle) != StringType::npos;
-}
-
-// This function implements either IsSubstring() or IsNotSubstring(),
-// depending on the value of the expected_to_be_substring parameter.
-// StringType here can be const char*, const wchar_t*, ::std::string,
-// or ::std::wstring.
-template <typename StringType>
-AssertionResult IsSubstringImpl(
-    bool expected_to_be_substring,
-    const char* needle_expr, const char* haystack_expr,
-    const StringType& needle, const StringType& haystack) {
-  if (IsSubstringPred(needle, haystack) == expected_to_be_substring)
-    return AssertionSuccess();
-
-  const bool is_wide_string = sizeof(needle[0]) > 1;
-  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
-  return AssertionFailure()
-      << "Value of: " << needle_expr << "\n"
-      << "  Actual: " << begin_string_quote << needle << "\"\n"
-      << "Expected: " << (expected_to_be_substring ? "" : "not ")
-      << "a substring of " << haystack_expr << "\n"
-      << "Which is: " << begin_string_quote << haystack << "\"";
-}
-
-}  // namespace
-
-// IsSubstring() and IsNotSubstring() check whether needle is a
-// substring of haystack (NULL is considered a substring of itself
-// only), and return an appropriate error message when they fail.
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const char* needle, const char* haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const wchar_t* needle, const wchar_t* haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::string& needle, const ::std::string& haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-
-#if GTEST_HAS_STD_WSTRING
-AssertionResult IsSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack) {
-  return IsSubstringImpl(true, needle_expr, haystack_expr, needle, haystack);
-}
-
-AssertionResult IsNotSubstring(
-    const char* needle_expr, const char* haystack_expr,
-    const ::std::wstring& needle, const ::std::wstring& haystack) {
-  return IsSubstringImpl(false, needle_expr, haystack_expr, needle, haystack);
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-namespace internal {
-
-#if GTEST_OS_WINDOWS
-
-namespace {
-
-// Helper function for IsHRESULT{SuccessFailure} predicates
-AssertionResult HRESULTFailureHelper(const char* expr,
-                                     const char* expected,
-                                     long hr) {  // NOLINT
-# if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_TV_TITLE
-
-  // Windows CE doesn't support FormatMessage.
-  const char error_text[] = "";
-
-# else
-
-  // Looks up the human-readable system message for the HRESULT code
-  // and since we're not passing any params to FormatMessage, we don't
-  // want inserts expanded.
-  const DWORD kFlags = FORMAT_MESSAGE_FROM_SYSTEM |
-                       FORMAT_MESSAGE_IGNORE_INSERTS;
-  const DWORD kBufSize = 4096;
-  // Gets the system's human readable message string for this HRESULT.
-  char error_text[kBufSize] = { '\0' };
-  DWORD message_length = ::FormatMessageA(kFlags,
-                                          0,   // no source, we're asking system
-                                          static_cast<DWORD>(hr),  // the error
-                                          0,   // no line width restrictions
-                                          error_text,  // output buffer
-                                          kBufSize,    // buf size
-                                          nullptr);  // no arguments for inserts
-  // Trims tailing white space (FormatMessage leaves a trailing CR-LF)
-  for (; message_length && IsSpace(error_text[message_length - 1]);
-          --message_length) {
-    error_text[message_length - 1] = '\0';
-  }
-
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-  const std::string error_hex("0x" + String::FormatHexInt(hr));
-  return ::testing::AssertionFailure()
-      << "Expected: " << expr << " " << expected << ".\n"
-      << "  Actual: " << error_hex << " " << error_text << "\n";
-}
-
-}  // namespace
-
-AssertionResult IsHRESULTSuccess(const char* expr, long hr) {  // NOLINT
-  if (SUCCEEDED(hr)) {
-    return AssertionSuccess();
-  }
-  return HRESULTFailureHelper(expr, "succeeds", hr);
-}
-
-AssertionResult IsHRESULTFailure(const char* expr, long hr) {  // NOLINT
-  if (FAILED(hr)) {
-    return AssertionSuccess();
-  }
-  return HRESULTFailureHelper(expr, "fails", hr);
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-// Utility functions for encoding Unicode text (wide strings) in
-// UTF-8.
-
-// A Unicode code-point can have up to 21 bits, and is encoded in UTF-8
-// like this:
-//
-// Code-point length   Encoding
-//   0 -  7 bits       0xxxxxxx
-//   8 - 11 bits       110xxxxx 10xxxxxx
-//  12 - 16 bits       1110xxxx 10xxxxxx 10xxxxxx
-//  17 - 21 bits       11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
-
-// The maximum code-point a one-byte UTF-8 sequence can represent.
-const UInt32 kMaxCodePoint1 = (static_cast<UInt32>(1) <<  7) - 1;
-
-// The maximum code-point a two-byte UTF-8 sequence can represent.
-const UInt32 kMaxCodePoint2 = (static_cast<UInt32>(1) << (5 + 6)) - 1;
-
-// The maximum code-point a three-byte UTF-8 sequence can represent.
-const UInt32 kMaxCodePoint3 = (static_cast<UInt32>(1) << (4 + 2*6)) - 1;
-
-// The maximum code-point a four-byte UTF-8 sequence can represent.
-const UInt32 kMaxCodePoint4 = (static_cast<UInt32>(1) << (3 + 3*6)) - 1;
-
-// Chops off the n lowest bits from a bit pattern.  Returns the n
-// lowest bits.  As a side effect, the original bit pattern will be
-// shifted to the right by n bits.
-inline UInt32 ChopLowBits(UInt32* bits, int n) {
-  const UInt32 low_bits = *bits & ((static_cast<UInt32>(1) << n) - 1);
-  *bits >>= n;
-  return low_bits;
-}
-
-// Converts a Unicode code point to a narrow string in UTF-8 encoding.
-// code_point parameter is of type UInt32 because wchar_t may not be
-// wide enough to contain a code point.
-// If the code_point is not a valid Unicode code point
-// (i.e. outside of Unicode range U+0 to U+10FFFF) it will be converted
-// to "(Invalid Unicode 0xXXXXXXXX)".
-std::string CodePointToUtf8(UInt32 code_point) {
-  if (code_point > kMaxCodePoint4) {
-    return "(Invalid Unicode 0x" + String::FormatHexUInt32(code_point) + ")";
-  }
-
-  char str[5];  // Big enough for the largest valid code point.
-  if (code_point <= kMaxCodePoint1) {
-    str[1] = '\0';
-    str[0] = static_cast<char>(code_point);                          // 0xxxxxxx
-  } else if (code_point <= kMaxCodePoint2) {
-    str[2] = '\0';
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xC0 | code_point);                   // 110xxxxx
-  } else if (code_point <= kMaxCodePoint3) {
-    str[3] = '\0';
-    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xE0 | code_point);                   // 1110xxxx
-  } else {  // code_point <= kMaxCodePoint4
-    str[4] = '\0';
-    str[3] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[2] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[1] = static_cast<char>(0x80 | ChopLowBits(&code_point, 6));  // 10xxxxxx
-    str[0] = static_cast<char>(0xF0 | code_point);                   // 11110xxx
-  }
-  return str;
-}
-
-// The following two functions only make sense if the system
-// uses UTF-16 for wide string encoding. All supported systems
-// with 16 bit wchar_t (Windows, Cygwin) do use UTF-16.
-
-// Determines if the arguments constitute UTF-16 surrogate pair
-// and thus should be combined into a single Unicode code point
-// using CreateCodePointFromUtf16SurrogatePair.
-inline bool IsUtf16SurrogatePair(wchar_t first, wchar_t second) {
-  return sizeof(wchar_t) == 2 &&
-      (first & 0xFC00) == 0xD800 && (second & 0xFC00) == 0xDC00;
-}
-
-// Creates a Unicode code point from UTF16 surrogate pair.
-inline UInt32 CreateCodePointFromUtf16SurrogatePair(wchar_t first,
-                                                    wchar_t second) {
-  const auto first_u = static_cast<UInt32>(first);
-  const auto second_u = static_cast<UInt32>(second);
-  const UInt32 mask = (1 << 10) - 1;
-  return (sizeof(wchar_t) == 2)
-             ? (((first_u & mask) << 10) | (second_u & mask)) + 0x10000
-             :
-             // This function should not be called when the condition is
-             // false, but we provide a sensible default in case it is.
-             first_u;
-}
-
-// Converts a wide string to a narrow string in UTF-8 encoding.
-// The wide string is assumed to have the following encoding:
-//   UTF-16 if sizeof(wchar_t) == 2 (on Windows, Cygwin)
-//   UTF-32 if sizeof(wchar_t) == 4 (on Linux)
-// Parameter str points to a null-terminated wide string.
-// Parameter num_chars may additionally limit the number
-// of wchar_t characters processed. -1 is used when the entire string
-// should be processed.
-// If the string contains code points that are not valid Unicode code points
-// (i.e. outside of Unicode range U+0 to U+10FFFF) they will be output
-// as '(Invalid Unicode 0xXXXXXXXX)'. If the string is in UTF16 encoding
-// and contains invalid UTF-16 surrogate pairs, values in those pairs
-// will be encoded as individual Unicode characters from Basic Normal Plane.
-std::string WideStringToUtf8(const wchar_t* str, int num_chars) {
-  if (num_chars == -1)
-    num_chars = static_cast<int>(wcslen(str));
-
-  ::std::stringstream stream;
-  for (int i = 0; i < num_chars; ++i) {
-    UInt32 unicode_code_point;
-
-    if (str[i] == L'\0') {
-      break;
-    } else if (i + 1 < num_chars && IsUtf16SurrogatePair(str[i], str[i + 1])) {
-      unicode_code_point = CreateCodePointFromUtf16SurrogatePair(str[i],
-                                                                 str[i + 1]);
-      i++;
-    } else {
-      unicode_code_point = static_cast<UInt32>(str[i]);
-    }
-
-    stream << CodePointToUtf8(unicode_code_point);
-  }
-  return StringStreamToString(&stream);
-}
-
-// Converts a wide C string to an std::string using the UTF-8 encoding.
-// NULL will be converted to "(null)".
-std::string String::ShowWideCString(const wchar_t * wide_c_str) {
-  if (wide_c_str == nullptr) return "(null)";
-
-  return internal::WideStringToUtf8(wide_c_str, -1);
-}
-
-// Compares two wide C strings.  Returns true if and only if they have the
-// same content.
-//
-// Unlike wcscmp(), this function can handle NULL argument(s).  A NULL
-// C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::WideCStringEquals(const wchar_t * lhs, const wchar_t * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-  return wcscmp(lhs, rhs) == 0;
-}
-
-// Helper function for *_STREQ on wide strings.
-AssertionResult CmpHelperSTREQ(const char* lhs_expression,
-                               const char* rhs_expression,
-                               const wchar_t* lhs,
-                               const wchar_t* rhs) {
-  if (String::WideCStringEquals(lhs, rhs)) {
-    return AssertionSuccess();
-  }
-
-  return EqFailure(lhs_expression,
-                   rhs_expression,
-                   PrintToString(lhs),
-                   PrintToString(rhs),
-                   false);
-}
-
-// Helper function for *_STRNE on wide strings.
-AssertionResult CmpHelperSTRNE(const char* s1_expression,
-                               const char* s2_expression,
-                               const wchar_t* s1,
-                               const wchar_t* s2) {
-  if (!String::WideCStringEquals(s1, s2)) {
-    return AssertionSuccess();
-  }
-
-  return AssertionFailure() << "Expected: (" << s1_expression << ") != ("
-                            << s2_expression << "), actual: "
-                            << PrintToString(s1)
-                            << " vs " << PrintToString(s2);
-}
-
-// Compares two C strings, ignoring case.  Returns true if and only if they have
-// the same content.
-//
-// Unlike strcasecmp(), this function can handle NULL argument(s).  A
-// NULL C string is considered different to any non-NULL C string,
-// including the empty string.
-bool String::CaseInsensitiveCStringEquals(const char * lhs, const char * rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-  if (rhs == nullptr) return false;
-  return posix::StrCaseCmp(lhs, rhs) == 0;
-}
-
-// Compares two wide C strings, ignoring case.  Returns true if and only if they
-// have the same content.
-//
-// Unlike wcscasecmp(), this function can handle NULL argument(s).
-// A NULL C string is considered different to any non-NULL wide C string,
-// including the empty string.
-// NB: The implementations on different platforms slightly differ.
-// On windows, this method uses _wcsicmp which compares according to LC_CTYPE
-// environment variable. On GNU platform this method uses wcscasecmp
-// which compares according to LC_CTYPE category of the current locale.
-// On MacOS X, it uses towlower, which also uses LC_CTYPE category of the
-// current locale.
-bool String::CaseInsensitiveWideCStringEquals(const wchar_t* lhs,
-                                              const wchar_t* rhs) {
-  if (lhs == nullptr) return rhs == nullptr;
-
-  if (rhs == nullptr) return false;
-
-#if GTEST_OS_WINDOWS
-  return _wcsicmp(lhs, rhs) == 0;
-#elif GTEST_OS_LINUX && !GTEST_OS_LINUX_ANDROID
-  return wcscasecmp(lhs, rhs) == 0;
-#else
-  // Android, Mac OS X and Cygwin don't define wcscasecmp.
-  // Other unknown OSes may not define it either.
-  wint_t left, right;
-  do {
-    left = towlower(static_cast<wint_t>(*lhs++));
-    right = towlower(static_cast<wint_t>(*rhs++));
-  } while (left && left == right);
-  return left == right;
-#endif  // OS selector
-}
-
-// Returns true if and only if str ends with the given suffix, ignoring case.
-// Any string is considered to end with an empty suffix.
-bool String::EndsWithCaseInsensitive(
-    const std::string& str, const std::string& suffix) {
-  const size_t str_len = str.length();
-  const size_t suffix_len = suffix.length();
-  return (str_len >= suffix_len) &&
-         CaseInsensitiveCStringEquals(str.c_str() + str_len - suffix_len,
-                                      suffix.c_str());
-}
-
-// Formats an int value as "%02d".
-std::string String::FormatIntWidth2(int value) {
-  std::stringstream ss;
-  ss << std::setfill('0') << std::setw(2) << value;
-  return ss.str();
-}
-
-// Formats an int value as "%X".
-std::string String::FormatHexUInt32(UInt32 value) {
-  std::stringstream ss;
-  ss << std::hex << std::uppercase << value;
-  return ss.str();
-}
-
-// Formats an int value as "%X".
-std::string String::FormatHexInt(int value) {
-  return FormatHexUInt32(static_cast<UInt32>(value));
-}
-
-// Formats a byte as "%02X".
-std::string String::FormatByte(unsigned char value) {
-  std::stringstream ss;
-  ss << std::setfill('0') << std::setw(2) << std::hex << std::uppercase
-     << static_cast<unsigned int>(value);
-  return ss.str();
-}
-
-// Converts the buffer in a stringstream to an std::string, converting NUL
-// bytes to "\\0" along the way.
-std::string StringStreamToString(::std::stringstream* ss) {
-  const ::std::string& str = ss->str();
-  const char* const start = str.c_str();
-  const char* const end = start + str.length();
-
-  std::string result;
-  result.reserve(static_cast<size_t>(2 * (end - start)));
-  for (const char* ch = start; ch != end; ++ch) {
-    if (*ch == '\0') {
-      result += "\\0";  // Replaces NUL with "\\0";
-    } else {
-      result += *ch;
-    }
-  }
-
-  return result;
-}
-
-// Appends the user-supplied message to the Google-Test-generated message.
-std::string AppendUserMessage(const std::string& gtest_msg,
-                              const Message& user_msg) {
-  // Appends the user message if it's non-empty.
-  const std::string user_msg_string = user_msg.GetString();
-  if (user_msg_string.empty()) {
-    return gtest_msg;
-  }
-
-  return gtest_msg + "\n" + user_msg_string;
-}
-
-}  // namespace internal
-
-// class TestResult
-
-// Creates an empty TestResult.
-TestResult::TestResult()
-    : death_test_count_(0), start_timestamp_(0), elapsed_time_(0) {}
-
-// D'tor.
-TestResult::~TestResult() {
-}
-
-// Returns the i-th test part result among all the results. i can
-// range from 0 to total_part_count() - 1. If i is not in that range,
-// aborts the program.
-const TestPartResult& TestResult::GetTestPartResult(int i) const {
-  if (i < 0 || i >= total_part_count())
-    internal::posix::Abort();
-  return test_part_results_.at(static_cast<size_t>(i));
-}
-
-// Returns the i-th test property. i can range from 0 to
-// test_property_count() - 1. If i is not in that range, aborts the
-// program.
-const TestProperty& TestResult::GetTestProperty(int i) const {
-  if (i < 0 || i >= test_property_count())
-    internal::posix::Abort();
-  return test_properties_.at(static_cast<size_t>(i));
-}
-
-// Clears the test part results.
-void TestResult::ClearTestPartResults() {
-  test_part_results_.clear();
-}
-
-// Adds a test part result to the list.
-void TestResult::AddTestPartResult(const TestPartResult& test_part_result) {
-  test_part_results_.push_back(test_part_result);
-}
-
-// Adds a test property to the list. If a property with the same key as the
-// supplied property is already represented, the value of this test_property
-// replaces the old value for that key.
-void TestResult::RecordProperty(const std::string& xml_element,
-                                const TestProperty& test_property) {
-  if (!ValidateTestProperty(xml_element, test_property)) {
-    return;
-  }
-  internal::MutexLock lock(&test_properites_mutex_);
-  const std::vector<TestProperty>::iterator property_with_matching_key =
-      std::find_if(test_properties_.begin(), test_properties_.end(),
-                   internal::TestPropertyKeyIs(test_property.key()));
-  if (property_with_matching_key == test_properties_.end()) {
-    test_properties_.push_back(test_property);
-    return;
-  }
-  property_with_matching_key->SetValue(test_property.value());
-}
-
-// The list of reserved attributes used in the <testsuites> element of XML
-// output.
-static const char* const kReservedTestSuitesAttributes[] = {
-  "disabled",
-  "errors",
-  "failures",
-  "name",
-  "random_seed",
-  "tests",
-  "time",
-  "timestamp"
-};
-
-// The list of reserved attributes used in the <testsuite> element of XML
-// output.
-static const char* const kReservedTestSuiteAttributes[] = {
-    "disabled", "errors", "failures", "name", "tests", "time", "timestamp"};
-
-// The list of reserved attributes used in the <testcase> element of XML output.
-static const char* const kReservedTestCaseAttributes[] = {
-    "classname",   "name", "status", "time",  "type_param",
-    "value_param", "file", "line"};
-
-// Use a slightly different set for allowed output to ensure existing tests can
-// still RecordProperty("result") or "RecordProperty(timestamp")
-static const char* const kReservedOutputTestCaseAttributes[] = {
-    "classname",   "name", "status", "time",   "type_param",
-    "value_param", "file", "line",   "result", "timestamp"};
-
-template <int kSize>
-std::vector<std::string> ArrayAsVector(const char* const (&array)[kSize]) {
-  return std::vector<std::string>(array, array + kSize);
-}
-
-static std::vector<std::string> GetReservedAttributesForElement(
-    const std::string& xml_element) {
-  if (xml_element == "testsuites") {
-    return ArrayAsVector(kReservedTestSuitesAttributes);
-  } else if (xml_element == "testsuite") {
-    return ArrayAsVector(kReservedTestSuiteAttributes);
-  } else if (xml_element == "testcase") {
-    return ArrayAsVector(kReservedTestCaseAttributes);
-  } else {
-    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
-  }
-  // This code is unreachable but some compilers may not realizes that.
-  return std::vector<std::string>();
-}
-
-// TODO(jdesprez): Merge the two getReserved attributes once skip is improved
-static std::vector<std::string> GetReservedOutputAttributesForElement(
-    const std::string& xml_element) {
-  if (xml_element == "testsuites") {
-    return ArrayAsVector(kReservedTestSuitesAttributes);
-  } else if (xml_element == "testsuite") {
-    return ArrayAsVector(kReservedTestSuiteAttributes);
-  } else if (xml_element == "testcase") {
-    return ArrayAsVector(kReservedOutputTestCaseAttributes);
-  } else {
-    GTEST_CHECK_(false) << "Unrecognized xml_element provided: " << xml_element;
-  }
-  // This code is unreachable but some compilers may not realizes that.
-  return std::vector<std::string>();
-}
-
-static std::string FormatWordList(const std::vector<std::string>& words) {
-  Message word_list;
-  for (size_t i = 0; i < words.size(); ++i) {
-    if (i > 0 && words.size() > 2) {
-      word_list << ", ";
-    }
-    if (i == words.size() - 1) {
-      word_list << "and ";
-    }
-    word_list << "'" << words[i] << "'";
-  }
-  return word_list.GetString();
-}
-
-static bool ValidateTestPropertyName(
-    const std::string& property_name,
-    const std::vector<std::string>& reserved_names) {
-  if (std::find(reserved_names.begin(), reserved_names.end(), property_name) !=
-          reserved_names.end()) {
-    ADD_FAILURE() << "Reserved key used in RecordProperty(): " << property_name
-                  << " (" << FormatWordList(reserved_names)
-                  << " are reserved by " << GTEST_NAME_ << ")";
-    return false;
-  }
-  return true;
-}
-
-// Adds a failure if the key is a reserved attribute of the element named
-// xml_element.  Returns true if the property is valid.
-bool TestResult::ValidateTestProperty(const std::string& xml_element,
-                                      const TestProperty& test_property) {
-  return ValidateTestPropertyName(test_property.key(),
-                                  GetReservedAttributesForElement(xml_element));
-}
-
-// Clears the object.
-void TestResult::Clear() {
-  test_part_results_.clear();
-  test_properties_.clear();
-  death_test_count_ = 0;
-  elapsed_time_ = 0;
-}
-
-// Returns true off the test part was skipped.
-static bool TestPartSkipped(const TestPartResult& result) {
-  return result.skipped();
-}
-
-// Returns true if and only if the test was skipped.
-bool TestResult::Skipped() const {
-  return !Failed() && CountIf(test_part_results_, TestPartSkipped) > 0;
-}
-
-// Returns true if and only if the test failed.
-bool TestResult::Failed() const {
-  for (int i = 0; i < total_part_count(); ++i) {
-    if (GetTestPartResult(i).failed())
-      return true;
-  }
-  return false;
-}
-
-// Returns true if and only if the test part fatally failed.
-static bool TestPartFatallyFailed(const TestPartResult& result) {
-  return result.fatally_failed();
-}
-
-// Returns true if and only if the test fatally failed.
-bool TestResult::HasFatalFailure() const {
-  return CountIf(test_part_results_, TestPartFatallyFailed) > 0;
-}
-
-// Returns true if and only if the test part non-fatally failed.
-static bool TestPartNonfatallyFailed(const TestPartResult& result) {
-  return result.nonfatally_failed();
-}
-
-// Returns true if and only if the test has a non-fatal failure.
-bool TestResult::HasNonfatalFailure() const {
-  return CountIf(test_part_results_, TestPartNonfatallyFailed) > 0;
-}
-
-// Gets the number of all test parts.  This is the sum of the number
-// of successful test parts and the number of failed test parts.
-int TestResult::total_part_count() const {
-  return static_cast<int>(test_part_results_.size());
-}
-
-// Returns the number of the test properties.
-int TestResult::test_property_count() const {
-  return static_cast<int>(test_properties_.size());
-}
-
-// class Test
-
-// Creates a Test object.
-
-// The c'tor saves the states of all flags.
-Test::Test()
-    : gtest_flag_saver_(new GTEST_FLAG_SAVER_) {
-}
-
-// The d'tor restores the states of all flags.  The actual work is
-// done by the d'tor of the gtest_flag_saver_ field, and thus not
-// visible here.
-Test::~Test() {
-}
-
-// Sets up the test fixture.
-//
-// A sub-class may override this.
-void Test::SetUp() {
-}
-
-// Tears down the test fixture.
-//
-// A sub-class may override this.
-void Test::TearDown() {
-}
-
-// Allows user supplied key value pairs to be recorded for later output.
-void Test::RecordProperty(const std::string& key, const std::string& value) {
-  UnitTest::GetInstance()->RecordProperty(key, value);
-}
-
-// Allows user supplied key value pairs to be recorded for later output.
-void Test::RecordProperty(const std::string& key, int value) {
-  Message value_message;
-  value_message << value;
-  RecordProperty(key, value_message.GetString().c_str());
-}
-
-namespace internal {
-
-void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
-                                    const std::string& message) {
-  // This function is a friend of UnitTest and as such has access to
-  // AddTestPartResult.
-  UnitTest::GetInstance()->AddTestPartResult(
-      result_type,
-      nullptr,  // No info about the source file where the exception occurred.
-      -1,       // We have no info on which line caused the exception.
-      message,
-      "");  // No stack trace, either.
-}
-
-}  // namespace internal
-
-// Google Test requires all tests in the same test suite to use the same test
-// fixture class.  This function checks if the current test has the
-// same fixture class as the first test in the current test suite.  If
-// yes, it returns true; otherwise it generates a Google Test failure and
-// returns false.
-bool Test::HasSameFixtureClass() {
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  const TestSuite* const test_suite = impl->current_test_suite();
-
-  // Info about the first test in the current test suite.
-  const TestInfo* const first_test_info = test_suite->test_info_list()[0];
-  const internal::TypeId first_fixture_id = first_test_info->fixture_class_id_;
-  const char* const first_test_name = first_test_info->name();
-
-  // Info about the current test.
-  const TestInfo* const this_test_info = impl->current_test_info();
-  const internal::TypeId this_fixture_id = this_test_info->fixture_class_id_;
-  const char* const this_test_name = this_test_info->name();
-
-  if (this_fixture_id != first_fixture_id) {
-    // Is the first test defined using TEST?
-    const bool first_is_TEST = first_fixture_id == internal::GetTestTypeId();
-    // Is this test defined using TEST?
-    const bool this_is_TEST = this_fixture_id == internal::GetTestTypeId();
-
-    if (first_is_TEST || this_is_TEST) {
-      // Both TEST and TEST_F appear in same test suite, which is incorrect.
-      // Tell the user how to fix this.
-
-      // Gets the name of the TEST and the name of the TEST_F.  Note
-      // that first_is_TEST and this_is_TEST cannot both be true, as
-      // the fixture IDs are different for the two tests.
-      const char* const TEST_name =
-          first_is_TEST ? first_test_name : this_test_name;
-      const char* const TEST_F_name =
-          first_is_TEST ? this_test_name : first_test_name;
-
-      ADD_FAILURE()
-          << "All tests in the same test suite must use the same test fixture\n"
-          << "class, so mixing TEST_F and TEST in the same test suite is\n"
-          << "illegal.  In test suite " << this_test_info->test_suite_name()
-          << ",\n"
-          << "test " << TEST_F_name << " is defined using TEST_F but\n"
-          << "test " << TEST_name << " is defined using TEST.  You probably\n"
-          << "want to change the TEST to TEST_F or move it to another test\n"
-          << "case.";
-    } else {
-      // Two fixture classes with the same name appear in two different
-      // namespaces, which is not allowed. Tell the user how to fix this.
-      ADD_FAILURE()
-          << "All tests in the same test suite must use the same test fixture\n"
-          << "class.  However, in test suite "
-          << this_test_info->test_suite_name() << ",\n"
-          << "you defined test " << first_test_name << " and test "
-          << this_test_name << "\n"
-          << "using two different test fixture classes.  This can happen if\n"
-          << "the two classes are from different namespaces or translation\n"
-          << "units and have the same name.  You should probably rename one\n"
-          << "of the classes to put the tests into different test suites.";
-    }
-    return false;
-  }
-
-  return true;
-}
-
-#if GTEST_HAS_SEH
-
-// Adds an "exception thrown" fatal failure to the current test.  This
-// function returns its result via an output parameter pointer because VC++
-// prohibits creation of objects with destructors on stack in functions
-// using __try (see error C2712).
-static std::string* FormatSehExceptionMessage(DWORD exception_code,
-                                              const char* location) {
-  Message message;
-  message << "SEH exception with code 0x" << std::setbase(16) <<
-    exception_code << std::setbase(10) << " thrown in " << location << ".";
-
-  return new std::string(message.GetString());
-}
-
-#endif  // GTEST_HAS_SEH
-
-namespace internal {
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Adds an "exception thrown" fatal failure to the current test.
-static std::string FormatCxxExceptionMessage(const char* description,
-                                             const char* location) {
-  Message message;
-  if (description != nullptr) {
-    message << "C++ exception with description \"" << description << "\"";
-  } else {
-    message << "Unknown C++ exception";
-  }
-  message << " thrown in " << location << ".";
-
-  return message.GetString();
-}
-
-static std::string PrintTestPartResultToString(
-    const TestPartResult& test_part_result);
-
-GoogleTestFailureException::GoogleTestFailureException(
-    const TestPartResult& failure)
-    : ::std::runtime_error(PrintTestPartResultToString(failure).c_str()) {}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// We put these helper functions in the internal namespace as IBM's xlC
-// compiler rejects the code if they were declared static.
-
-// Runs the given method and handles SEH exceptions it throws, when
-// SEH is supported; returns the 0-value for type Result in case of an
-// SEH exception.  (Microsoft compilers cannot handle SEH and C++
-// exceptions in the same function.  Therefore, we provide a separate
-// wrapper function for handling SEH exceptions.)
-template <class T, typename Result>
-Result HandleSehExceptionsInMethodIfSupported(
-    T* object, Result (T::*method)(), const char* location) {
-#if GTEST_HAS_SEH
-  __try {
-    return (object->*method)();
-  } __except (internal::UnitTestOptions::GTestShouldProcessSEH(  // NOLINT
-      GetExceptionCode())) {
-    // We create the exception message on the heap because VC++ prohibits
-    // creation of objects with destructors on stack in functions using __try
-    // (see error C2712).
-    std::string* exception_message = FormatSehExceptionMessage(
-        GetExceptionCode(), location);
-    internal::ReportFailureInUnknownLocation(TestPartResult::kFatalFailure,
-                                             *exception_message);
-    delete exception_message;
-    return static_cast<Result>(0);
-  }
-#else
-  (void)location;
-  return (object->*method)();
-#endif  // GTEST_HAS_SEH
-}
-
-// Runs the given method and catches and reports C++ and/or SEH-style
-// exceptions, if they are supported; returns the 0-value for type
-// Result in case of an SEH exception.
-template <class T, typename Result>
-Result HandleExceptionsInMethodIfSupported(
-    T* object, Result (T::*method)(), const char* location) {
-  // NOTE: The user code can affect the way in which Google Test handles
-  // exceptions by setting GTEST_FLAG(catch_exceptions), but only before
-  // RUN_ALL_TESTS() starts. It is technically possible to check the flag
-  // after the exception is caught and either report or re-throw the
-  // exception based on the flag's value:
-  //
-  // try {
-  //   // Perform the test method.
-  // } catch (...) {
-  //   if (GTEST_FLAG(catch_exceptions))
-  //     // Report the exception as failure.
-  //   else
-  //     throw;  // Re-throws the original exception.
-  // }
-  //
-  // However, the purpose of this flag is to allow the program to drop into
-  // the debugger when the exception is thrown. On most platforms, once the
-  // control enters the catch block, the exception origin information is
-  // lost and the debugger will stop the program at the point of the
-  // re-throw in this function -- instead of at the point of the original
-  // throw statement in the code under test.  For this reason, we perform
-  // the check early, sacrificing the ability to affect Google Test's
-  // exception handling in the method where the exception is thrown.
-  if (internal::GetUnitTestImpl()->catch_exceptions()) {
-#if GTEST_HAS_EXCEPTIONS
-    try {
-      return HandleSehExceptionsInMethodIfSupported(object, method, location);
-    } catch (const AssertionException&) {  // NOLINT
-      // This failure was reported already.
-    } catch (const internal::GoogleTestFailureException&) {  // NOLINT
-      // This exception type can only be thrown by a failed Google
-      // Test assertion with the intention of letting another testing
-      // framework catch it.  Therefore we just re-throw it.
-      throw;
-    } catch (const std::exception& e) {  // NOLINT
-      internal::ReportFailureInUnknownLocation(
-          TestPartResult::kFatalFailure,
-          FormatCxxExceptionMessage(e.what(), location));
-    } catch (...) {  // NOLINT
-      internal::ReportFailureInUnknownLocation(
-          TestPartResult::kFatalFailure,
-          FormatCxxExceptionMessage(nullptr, location));
-    }
-    return static_cast<Result>(0);
-#else
-    return HandleSehExceptionsInMethodIfSupported(object, method, location);
-#endif  // GTEST_HAS_EXCEPTIONS
-  } else {
-    return (object->*method)();
-  }
-}
-
-}  // namespace internal
-
-// Runs the test and updates the test result.
-void Test::Run() {
-  if (!HasSameFixtureClass()) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(this, &Test::SetUp, "SetUp()");
-  // We will run the test only if SetUp() was successful and didn't call
-  // GTEST_SKIP().
-  if (!HasFatalFailure() && !IsSkipped()) {
-    impl->os_stack_trace_getter()->UponLeavingGTest();
-    internal::HandleExceptionsInMethodIfSupported(
-        this, &Test::TestBody, "the test body");
-  }
-
-  // However, we want to clean up as much as possible.  Hence we will
-  // always call TearDown(), even if SetUp() or the test body has
-  // failed.
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &Test::TearDown, "TearDown()");
-}
-
-// Returns true if and only if the current test has a fatal failure.
-bool Test::HasFatalFailure() {
-  return internal::GetUnitTestImpl()->current_test_result()->HasFatalFailure();
-}
-
-// Returns true if and only if the current test has a non-fatal failure.
-bool Test::HasNonfatalFailure() {
-  return internal::GetUnitTestImpl()->current_test_result()->
-      HasNonfatalFailure();
-}
-
-// Returns true if and only if the current test was skipped.
-bool Test::IsSkipped() {
-  return internal::GetUnitTestImpl()->current_test_result()->Skipped();
-}
-
-// class TestInfo
-
-// Constructs a TestInfo object. It assumes ownership of the test factory
-// object.
-TestInfo::TestInfo(const std::string& a_test_suite_name,
-                   const std::string& a_name, const char* a_type_param,
-                   const char* a_value_param,
-                   internal::CodeLocation a_code_location,
-                   internal::TypeId fixture_class_id,
-                   internal::TestFactoryBase* factory)
-    : test_suite_name_(a_test_suite_name),
-      name_(a_name),
-      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
-      value_param_(a_value_param ? new std::string(a_value_param) : nullptr),
-      location_(a_code_location),
-      fixture_class_id_(fixture_class_id),
-      should_run_(false),
-      is_disabled_(false),
-      matches_filter_(false),
-      factory_(factory),
-      result_() {}
-
-// Destructs a TestInfo object.
-TestInfo::~TestInfo() { delete factory_; }
-
-namespace internal {
-
-// Creates a new TestInfo object and registers it with Google Test;
-// returns the created object.
-//
-// Arguments:
-//
-//   test_suite_name:   name of the test suite
-//   name:             name of the test
-//   type_param:       the name of the test's type parameter, or NULL if
-//                     this is not a typed or a type-parameterized test.
-//   value_param:      text representation of the test's value parameter,
-//                     or NULL if this is not a value-parameterized test.
-//   code_location:    code location where the test is defined
-//   fixture_class_id: ID of the test fixture class
-//   set_up_tc:        pointer to the function that sets up the test suite
-//   tear_down_tc:     pointer to the function that tears down the test suite
-//   factory:          pointer to the factory that creates a test object.
-//                     The newly created TestInfo instance will assume
-//                     ownership of the factory object.
-TestInfo* MakeAndRegisterTestInfo(
-    const char* test_suite_name, const char* name, const char* type_param,
-    const char* value_param, CodeLocation code_location,
-    TypeId fixture_class_id, SetUpTestSuiteFunc set_up_tc,
-    TearDownTestSuiteFunc tear_down_tc, TestFactoryBase* factory) {
-  TestInfo* const test_info =
-      new TestInfo(test_suite_name, name, type_param, value_param,
-                   code_location, fixture_class_id, factory);
-  GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
-  return test_info;
-}
-
-void ReportInvalidTestSuiteType(const char* test_suite_name,
-                                CodeLocation code_location) {
-  Message errors;
-  errors
-      << "Attempted redefinition of test suite " << test_suite_name << ".\n"
-      << "All tests in the same test suite must use the same test fixture\n"
-      << "class.  However, in test suite " << test_suite_name << ", you tried\n"
-      << "to define a test using a fixture class different from the one\n"
-      << "used earlier. This can happen if the two fixture classes are\n"
-      << "from different namespaces and have the same name. You should\n"
-      << "probably rename one of the classes to put the tests into different\n"
-      << "test suites.";
-
-  GTEST_LOG_(ERROR) << FormatFileLocation(code_location.file.c_str(),
-                                          code_location.line)
-                    << " " << errors.GetString();
-}
-}  // namespace internal
-
-namespace {
-
-// A predicate that checks the test name of a TestInfo against a known
-// value.
-//
-// This is used for implementation of the TestSuite class only.  We put
-// it in the anonymous namespace to prevent polluting the outer
-// namespace.
-//
-// TestNameIs is copyable.
-class TestNameIs {
- public:
-  // Constructor.
-  //
-  // TestNameIs has NO default constructor.
-  explicit TestNameIs(const char* name)
-      : name_(name) {}
-
-  // Returns true if and only if the test name of test_info matches name_.
-  bool operator()(const TestInfo * test_info) const {
-    return test_info && test_info->name() == name_;
-  }
-
- private:
-  std::string name_;
-};
-
-}  // namespace
-
-namespace internal {
-
-// This method expands all parameterized tests registered with macros TEST_P
-// and INSTANTIATE_TEST_SUITE_P into regular tests and registers those.
-// This will be done just once during the program runtime.
-void UnitTestImpl::RegisterParameterizedTests() {
-  if (!parameterized_tests_registered_) {
-    parameterized_test_registry_.RegisterTests();
-    parameterized_tests_registered_ = true;
-  }
-}
-
-}  // namespace internal
-
-// Creates the test object, runs it, records its result, and then
-// deletes it.
-void TestInfo::Run() {
-  if (!should_run_) return;
-
-  // Tells UnitTest where to store test result.
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_info(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Notifies the unit test event listeners that a test is about to start.
-  repeater->OnTestStart(*this);
-
-  const TimeInMillis start = internal::GetTimeInMillis();
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-
-  // Creates the test object.
-  Test* const test = internal::HandleExceptionsInMethodIfSupported(
-      factory_, &internal::TestFactoryBase::CreateTest,
-      "the test fixture's constructor");
-
-  // Runs the test if the constructor didn't generate a fatal failure or invoke
-  // GTEST_SKIP().
-  // Note that the object will not be null
-  if (!Test::HasFatalFailure() && !Test::IsSkipped()) {
-    // This doesn't throw as all user code that can throw are wrapped into
-    // exception handling code.
-    test->Run();
-  }
-
-  if (test != nullptr) {
-    // Deletes the test object.
-    impl->os_stack_trace_getter()->UponLeavingGTest();
-    internal::HandleExceptionsInMethodIfSupported(
-        test, &Test::DeleteSelf_, "the test fixture's destructor");
-  }
-
-  result_.set_start_timestamp(start);
-  result_.set_elapsed_time(internal::GetTimeInMillis() - start);
-
-  // Notifies the unit test event listener that a test has just finished.
-  repeater->OnTestEnd(*this);
-
-  // Tells UnitTest to stop associating assertion results to this
-  // test.
-  impl->set_current_test_info(nullptr);
-}
-
-// class TestSuite
-
-// Gets the number of successful tests in this test suite.
-int TestSuite::successful_test_count() const {
-  return CountIf(test_info_list_, TestPassed);
-}
-
-// Gets the number of successful tests in this test suite.
-int TestSuite::skipped_test_count() const {
-  return CountIf(test_info_list_, TestSkipped);
-}
-
-// Gets the number of failed tests in this test suite.
-int TestSuite::failed_test_count() const {
-  return CountIf(test_info_list_, TestFailed);
-}
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int TestSuite::reportable_disabled_test_count() const {
-  return CountIf(test_info_list_, TestReportableDisabled);
-}
-
-// Gets the number of disabled tests in this test suite.
-int TestSuite::disabled_test_count() const {
-  return CountIf(test_info_list_, TestDisabled);
-}
-
-// Gets the number of tests to be printed in the XML report.
-int TestSuite::reportable_test_count() const {
-  return CountIf(test_info_list_, TestReportable);
-}
-
-// Get the number of tests in this test suite that should run.
-int TestSuite::test_to_run_count() const {
-  return CountIf(test_info_list_, ShouldRunTest);
-}
-
-// Gets the number of all tests.
-int TestSuite::total_test_count() const {
-  return static_cast<int>(test_info_list_.size());
-}
-
-// Creates a TestSuite with the given name.
-//
-// Arguments:
-//
-//   name:         name of the test suite
-//   a_type_param: the name of the test suite's type parameter, or NULL if
-//                 this is not a typed or a type-parameterized test suite.
-//   set_up_tc:    pointer to the function that sets up the test suite
-//   tear_down_tc: pointer to the function that tears down the test suite
-TestSuite::TestSuite(const char* a_name, const char* a_type_param,
-                     internal::SetUpTestSuiteFunc set_up_tc,
-                     internal::TearDownTestSuiteFunc tear_down_tc)
-    : name_(a_name),
-      type_param_(a_type_param ? new std::string(a_type_param) : nullptr),
-      set_up_tc_(set_up_tc),
-      tear_down_tc_(tear_down_tc),
-      should_run_(false),
-      start_timestamp_(0),
-      elapsed_time_(0) {}
-
-// Destructor of TestSuite.
-TestSuite::~TestSuite() {
-  // Deletes every Test in the collection.
-  ForEach(test_info_list_, internal::Delete<TestInfo>);
-}
-
-// Returns the i-th test among all the tests. i can range from 0 to
-// total_test_count() - 1. If i is not in that range, returns NULL.
-const TestInfo* TestSuite::GetTestInfo(int i) const {
-  const int index = GetElementOr(test_indices_, i, -1);
-  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
-}
-
-// Returns the i-th test among all the tests. i can range from 0 to
-// total_test_count() - 1. If i is not in that range, returns NULL.
-TestInfo* TestSuite::GetMutableTestInfo(int i) {
-  const int index = GetElementOr(test_indices_, i, -1);
-  return index < 0 ? nullptr : test_info_list_[static_cast<size_t>(index)];
-}
-
-// Adds a test to this test suite.  Will delete the test upon
-// destruction of the TestSuite object.
-void TestSuite::AddTestInfo(TestInfo* test_info) {
-  test_info_list_.push_back(test_info);
-  test_indices_.push_back(static_cast<int>(test_indices_.size()));
-}
-
-// Runs every test in this TestSuite.
-void TestSuite::Run() {
-  if (!should_run_) return;
-
-  internal::UnitTestImpl* const impl = internal::GetUnitTestImpl();
-  impl->set_current_test_suite(this);
-
-  TestEventListener* repeater = UnitTest::GetInstance()->listeners().repeater();
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteStart(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI
-  repeater->OnTestCaseStart(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &TestSuite::RunSetUpTestSuite, "SetUpTestSuite()");
-
-  start_timestamp_ = internal::GetTimeInMillis();
-  for (int i = 0; i < total_test_count(); i++) {
-    GetMutableTestInfo(i)->Run();
-  }
-  elapsed_time_ = internal::GetTimeInMillis() - start_timestamp_;
-
-  impl->os_stack_trace_getter()->UponLeavingGTest();
-  internal::HandleExceptionsInMethodIfSupported(
-      this, &TestSuite::RunTearDownTestSuite, "TearDownTestSuite()");
-
-  // Call both legacy and the new API
-  repeater->OnTestSuiteEnd(*this);
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI
-  repeater->OnTestCaseEnd(*this);
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI
-
-  impl->set_current_test_suite(nullptr);
-}
-
-// Clears the results of all tests in this test suite.
-void TestSuite::ClearResult() {
-  ad_hoc_test_result_.Clear();
-  ForEach(test_info_list_, TestInfo::ClearTestResult);
-}
-
-// Shuffles the tests in this test suite.
-void TestSuite::ShuffleTests(internal::Random* random) {
-  Shuffle(random, &test_indices_);
-}
-
-// Restores the test order to before the first shuffle.
-void TestSuite::UnshuffleTests() {
-  for (size_t i = 0; i < test_indices_.size(); i++) {
-    test_indices_[i] = static_cast<int>(i);
-  }
-}
-
-// Formats a countable noun.  Depending on its quantity, either the
-// singular form or the plural form is used. e.g.
-//
-// FormatCountableNoun(1, "formula", "formuli") returns "1 formula".
-// FormatCountableNoun(5, "book", "books") returns "5 books".
-static std::string FormatCountableNoun(int count,
-                                       const char * singular_form,
-                                       const char * plural_form) {
-  return internal::StreamableToString(count) + " " +
-      (count == 1 ? singular_form : plural_form);
-}
-
-// Formats the count of tests.
-static std::string FormatTestCount(int test_count) {
-  return FormatCountableNoun(test_count, "test", "tests");
-}
-
-// Formats the count of test suites.
-static std::string FormatTestSuiteCount(int test_suite_count) {
-  return FormatCountableNoun(test_suite_count, "test suite", "test suites");
-}
-
-// Converts a TestPartResult::Type enum to human-friendly string
-// representation.  Both kNonFatalFailure and kFatalFailure are translated
-// to "Failure", as the user usually doesn't care about the difference
-// between the two when viewing the test result.
-static const char * TestPartResultTypeToString(TestPartResult::Type type) {
-  switch (type) {
-    case TestPartResult::kSkip:
-      return "Skipped";
-    case TestPartResult::kSuccess:
-      return "Success";
-
-    case TestPartResult::kNonFatalFailure:
-    case TestPartResult::kFatalFailure:
-#ifdef _MSC_VER
-      return "error: ";
-#else
-      return "Failure\n";
-#endif
-    default:
-      return "Unknown result type";
-  }
-}
-
-namespace internal {
-
-// Prints a TestPartResult to an std::string.
-static std::string PrintTestPartResultToString(
-    const TestPartResult& test_part_result) {
-  return (Message()
-          << internal::FormatFileLocation(test_part_result.file_name(),
-                                          test_part_result.line_number())
-          << " " << TestPartResultTypeToString(test_part_result.type())
-          << test_part_result.message()).GetString();
-}
-
-// Prints a TestPartResult.
-static void PrintTestPartResult(const TestPartResult& test_part_result) {
-  const std::string& result =
-      PrintTestPartResultToString(test_part_result);
-  printf("%s\n", result.c_str());
-  fflush(stdout);
-  // If the test program runs in Visual Studio or a debugger, the
-  // following statements add the test part result message to the Output
-  // window such that the user can double-click on it to jump to the
-  // corresponding source code location; otherwise they do nothing.
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-  // We don't call OutputDebugString*() on Windows Mobile, as printing
-  // to stdout is done by OutputDebugString() there already - we don't
-  // want the same message printed twice.
-  ::OutputDebugStringA(result.c_str());
-  ::OutputDebugStringA("\n");
-#endif
-}
-
-// class PrettyUnitTestResultPrinter
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
-    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
-
-// Returns the character attribute for the given color.
-static WORD GetColorAttribute(GTestColor color) {
-  switch (color) {
-    case COLOR_RED:    return FOREGROUND_RED;
-    case COLOR_GREEN:  return FOREGROUND_GREEN;
-    case COLOR_YELLOW: return FOREGROUND_RED | FOREGROUND_GREEN;
-    default:           return 0;
-  }
-}
-
-static int GetBitOffset(WORD color_mask) {
-  if (color_mask == 0) return 0;
-
-  int bitOffset = 0;
-  while ((color_mask & 1) == 0) {
-    color_mask >>= 1;
-    ++bitOffset;
-  }
-  return bitOffset;
-}
-
-static WORD GetNewColor(GTestColor color, WORD old_color_attrs) {
-  // Let's reuse the BG
-  static const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
-                                      BACKGROUND_RED | BACKGROUND_INTENSITY;
-  static const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
-                                      FOREGROUND_RED | FOREGROUND_INTENSITY;
-  const WORD existing_bg = old_color_attrs & background_mask;
-
-  WORD new_color =
-      GetColorAttribute(color) | existing_bg | FOREGROUND_INTENSITY;
-  static const int bg_bitOffset = GetBitOffset(background_mask);
-  static const int fg_bitOffset = GetBitOffset(foreground_mask);
-
-  if (((new_color & background_mask) >> bg_bitOffset) ==
-      ((new_color & foreground_mask) >> fg_bitOffset)) {
-    new_color ^= FOREGROUND_INTENSITY;  // invert intensity
-  }
-  return new_color;
-}
-
-#else
-
-// Returns the ANSI color code for the given color.  COLOR_DEFAULT is
-// an invalid input.
-static const char* GetAnsiColorCode(GTestColor color) {
-  switch (color) {
-    case COLOR_RED:     return "1";
-    case COLOR_GREEN:   return "2";
-    case COLOR_YELLOW:  return "3";
-    default:
-      return nullptr;
-  }
-}
-
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-
-// Returns true if and only if Google Test should use colors in the output.
-bool ShouldUseColor(bool stdout_is_tty) {
-  const char* const gtest_color = GTEST_FLAG(color).c_str();
-
-  if (String::CaseInsensitiveCStringEquals(gtest_color, "auto")) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-    // On Windows the TERM variable is usually not set, but the
-    // console there does support colors.
-    return stdout_is_tty;
-#else
-    // On non-Windows platforms, we rely on the TERM variable.
-    const char* const term = posix::GetEnv("TERM");
-    const bool term_supports_color =
-        String::CStringEquals(term, "xterm") ||
-        String::CStringEquals(term, "xterm-color") ||
-        String::CStringEquals(term, "xterm-256color") ||
-        String::CStringEquals(term, "screen") ||
-        String::CStringEquals(term, "screen-256color") ||
-        String::CStringEquals(term, "tmux") ||
-        String::CStringEquals(term, "tmux-256color") ||
-        String::CStringEquals(term, "rxvt-unicode") ||
-        String::CStringEquals(term, "rxvt-unicode-256color") ||
-        String::CStringEquals(term, "linux") ||
-        String::CStringEquals(term, "cygwin");
-    return stdout_is_tty && term_supports_color;
-#endif  // GTEST_OS_WINDOWS
-  }
-
-  return String::CaseInsensitiveCStringEquals(gtest_color, "yes") ||
-      String::CaseInsensitiveCStringEquals(gtest_color, "true") ||
-      String::CaseInsensitiveCStringEquals(gtest_color, "t") ||
-      String::CStringEquals(gtest_color, "1");
-  // We take "yes", "true", "t", and "1" as meaning "yes".  If the
-  // value is neither one of these nor "auto", we treat it as "no" to
-  // be conservative.
-}
-
-// Helpers for printing colored strings to stdout. Note that on Windows, we
-// cannot simply emit special characters and have the terminal change colors.
-// This routine must actually emit the characters rather than return a string
-// that would be colored when printed, as can be done on Linux.
-void ColoredPrintf(GTestColor color, const char* fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-
-#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS || GTEST_OS_IOS || \
-    GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT || defined(ESP_PLATFORM)
-  const bool use_color = AlwaysFalse();
-#else
-  static const bool in_color_mode =
-      ShouldUseColor(posix::IsATTY(posix::FileNo(stdout)) != 0);
-  const bool use_color = in_color_mode && (color != COLOR_DEFAULT);
-#endif  // GTEST_OS_WINDOWS_MOBILE || GTEST_OS_ZOS
-
-  if (!use_color) {
-    vprintf(fmt, args);
-    va_end(args);
-    return;
-  }
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE && \
-    !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT && !GTEST_OS_WINDOWS_MINGW
-  const HANDLE stdout_handle = GetStdHandle(STD_OUTPUT_HANDLE);
-
-  // Gets the current text color.
-  CONSOLE_SCREEN_BUFFER_INFO buffer_info;
-  GetConsoleScreenBufferInfo(stdout_handle, &buffer_info);
-  const WORD old_color_attrs = buffer_info.wAttributes;
-  const WORD new_color = GetNewColor(color, old_color_attrs);
-
-  // We need to flush the stream buffers into the console before each
-  // SetConsoleTextAttribute call lest it affect the text that is already
-  // printed but has not yet reached the console.
-  fflush(stdout);
-  SetConsoleTextAttribute(stdout_handle, new_color);
-
-  vprintf(fmt, args);
-
-  fflush(stdout);
-  // Restores the text color.
-  SetConsoleTextAttribute(stdout_handle, old_color_attrs);
-#else
-  printf("\033[0;3%sm", GetAnsiColorCode(color));
-  vprintf(fmt, args);
-  printf("\033[m");  // Resets the terminal to default.
-#endif  // GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MOBILE
-  va_end(args);
-}
-
-// Text printed in Google Test's text output and --gtest_list_tests
-// output to label the type parameter and value parameter for a test.
-static const char kTypeParamLabel[] = "TypeParam";
-static const char kValueParamLabel[] = "GetParam()";
-
-static void PrintFullTestCommentIfPresent(const TestInfo& test_info) {
-  const char* const type_param = test_info.type_param();
-  const char* const value_param = test_info.value_param();
-
-  if (type_param != nullptr || value_param != nullptr) {
-    printf(", where ");
-    if (type_param != nullptr) {
-      printf("%s = %s", kTypeParamLabel, type_param);
-      if (value_param != nullptr) printf(" and ");
-    }
-    if (value_param != nullptr) {
-      printf("%s = %s", kValueParamLabel, value_param);
-    }
-  }
-}
-
-// This class implements the TestEventListener interface.
-//
-// Class PrettyUnitTestResultPrinter is copyable.
-class PrettyUnitTestResultPrinter : public TestEventListener {
- public:
-  PrettyUnitTestResultPrinter() {}
-  static void PrintTestName(const char* test_suite, const char* test) {
-    printf("%s.%s", test_suite, test);
-  }
-
-  // The following methods override what's in the TestEventListener class.
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
-  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {}
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& test_case) override;
-#else
-  void OnTestSuiteStart(const TestSuite& test_suite) override;
-#endif  // OnTestCaseStart
-
-  void OnTestStart(const TestInfo& test_info) override;
-
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& test_case) override;
-#else
-  void OnTestSuiteEnd(const TestSuite& test_suite) override;
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {}
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {}
-
- private:
-  static void PrintFailedTests(const UnitTest& unit_test);
-  static void PrintSkippedTests(const UnitTest& unit_test);
-};
-
-  // Fired before each iteration of tests starts.
-void PrettyUnitTestResultPrinter::OnTestIterationStart(
-    const UnitTest& unit_test, int iteration) {
-  if (GTEST_FLAG(repeat) != 1)
-    printf("\nRepeating all tests (iteration %d) . . .\n\n", iteration + 1);
-
-  const char* const filter = GTEST_FLAG(filter).c_str();
-
-  // Prints the filter if it's not *.  This reminds the user that some
-  // tests may be skipped.
-  if (!String::CStringEquals(filter, kUniversalFilter)) {
-    ColoredPrintf(COLOR_YELLOW,
-                  "Note: %s filter = %s\n", GTEST_NAME_, filter);
-  }
-
-  if (internal::ShouldShard(kTestTotalShards, kTestShardIndex, false)) {
-    const Int32 shard_index = Int32FromEnvOrDie(kTestShardIndex, -1);
-    ColoredPrintf(COLOR_YELLOW,
-                  "Note: This is test shard %d of %s.\n",
-                  static_cast<int>(shard_index) + 1,
-                  internal::posix::GetEnv(kTestTotalShards));
-  }
-
-  if (GTEST_FLAG(shuffle)) {
-    ColoredPrintf(COLOR_YELLOW,
-                  "Note: Randomizing tests' orders with a seed of %d .\n",
-                  unit_test.random_seed());
-  }
-
-  ColoredPrintf(COLOR_GREEN,  "[==========] ");
-  printf("Running %s from %s.\n",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  fflush(stdout);
-}
-
-void PrettyUnitTestResultPrinter::OnEnvironmentsSetUpStart(
-    const UnitTest& /*unit_test*/) {
-  ColoredPrintf(COLOR_GREEN,  "[----------] ");
-  printf("Global test environment set-up.\n");
-  fflush(stdout);
-}
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-void PrettyUnitTestResultPrinter::OnTestCaseStart(const TestCase& test_case) {
-  const std::string counts =
-      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
-  ColoredPrintf(COLOR_GREEN, "[----------] ");
-  printf("%s from %s", counts.c_str(), test_case.name());
-  if (test_case.type_param() == nullptr) {
-    printf("\n");
-  } else {
-    printf(", where %s = %s\n", kTypeParamLabel, test_case.type_param());
-  }
-  fflush(stdout);
-}
-#else
-void PrettyUnitTestResultPrinter::OnTestSuiteStart(
-    const TestSuite& test_suite) {
-  const std::string counts =
-      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
-  ColoredPrintf(COLOR_GREEN, "[----------] ");
-  printf("%s from %s", counts.c_str(), test_suite.name());
-  if (test_suite.type_param() == nullptr) {
-    printf("\n");
-  } else {
-    printf(", where %s = %s\n", kTypeParamLabel, test_suite.type_param());
-  }
-  fflush(stdout);
-}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-void PrettyUnitTestResultPrinter::OnTestStart(const TestInfo& test_info) {
-  ColoredPrintf(COLOR_GREEN,  "[ RUN      ] ");
-  PrintTestName(test_info.test_suite_name(), test_info.name());
-  printf("\n");
-  fflush(stdout);
-}
-
-// Called after an assertion failure.
-void PrettyUnitTestResultPrinter::OnTestPartResult(
-    const TestPartResult& result) {
-  switch (result.type()) {
-    // If the test part succeeded, or was skipped,
-    // we don't need to do anything.
-    case TestPartResult::kSkip:
-    case TestPartResult::kSuccess:
-      return;
-    default:
-      // Print failure message from the assertion
-      // (e.g. expected this and got that).
-      PrintTestPartResult(result);
-      fflush(stdout);
-  }
-}
-
-void PrettyUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
-  if (test_info.result()->Passed()) {
-    ColoredPrintf(COLOR_GREEN, "[       OK ] ");
-  } else if (test_info.result()->Skipped()) {
-    ColoredPrintf(COLOR_GREEN, "[  SKIPPED ] ");
-  } else {
-    ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
-  }
-  PrintTestName(test_info.test_suite_name(), test_info.name());
-  if (test_info.result()->Failed())
-    PrintFullTestCommentIfPresent(test_info);
-
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms)\n", internal::StreamableToString(
-           test_info.result()->elapsed_time()).c_str());
-  } else {
-    printf("\n");
-  }
-  fflush(stdout);
-}
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-void PrettyUnitTestResultPrinter::OnTestCaseEnd(const TestCase& test_case) {
-  if (!GTEST_FLAG(print_time)) return;
-
-  const std::string counts =
-      FormatCountableNoun(test_case.test_to_run_count(), "test", "tests");
-  ColoredPrintf(COLOR_GREEN, "[----------] ");
-  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_case.name(),
-         internal::StreamableToString(test_case.elapsed_time()).c_str());
-  fflush(stdout);
-}
-#else
-void PrettyUnitTestResultPrinter::OnTestSuiteEnd(const TestSuite& test_suite) {
-  if (!GTEST_FLAG(print_time)) return;
-
-  const std::string counts =
-      FormatCountableNoun(test_suite.test_to_run_count(), "test", "tests");
-  ColoredPrintf(COLOR_GREEN, "[----------] ");
-  printf("%s from %s (%s ms total)\n\n", counts.c_str(), test_suite.name(),
-         internal::StreamableToString(test_suite.elapsed_time()).c_str());
-  fflush(stdout);
-}
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-void PrettyUnitTestResultPrinter::OnEnvironmentsTearDownStart(
-    const UnitTest& /*unit_test*/) {
-  ColoredPrintf(COLOR_GREEN,  "[----------] ");
-  printf("Global test environment tear-down\n");
-  fflush(stdout);
-}
-
-// Internal helper for printing the list of failed tests.
-void PrettyUnitTestResultPrinter::PrintFailedTests(const UnitTest& unit_test) {
-  const int failed_test_count = unit_test.failed_test_count();
-  if (failed_test_count == 0) {
-    return;
-  }
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run() || (test_suite.failed_test_count() == 0)) {
-      continue;
-    }
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      if (!test_info.should_run() || !test_info.result()->Failed()) {
-        continue;
-      }
-      ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
-      printf("%s.%s", test_suite.name(), test_info.name());
-      PrintFullTestCommentIfPresent(test_info);
-      printf("\n");
-    }
-  }
-}
-
-// Internal helper for printing the list of skipped tests.
-void PrettyUnitTestResultPrinter::PrintSkippedTests(const UnitTest& unit_test) {
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count == 0) {
-    return;
-  }
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    const TestSuite& test_suite = *unit_test.GetTestSuite(i);
-    if (!test_suite.should_run() || (test_suite.skipped_test_count() == 0)) {
-      continue;
-    }
-    for (int j = 0; j < test_suite.total_test_count(); ++j) {
-      const TestInfo& test_info = *test_suite.GetTestInfo(j);
-      if (!test_info.should_run() || !test_info.result()->Skipped()) {
-        continue;
-      }
-      ColoredPrintf(COLOR_GREEN, "[  SKIPPED ] ");
-      printf("%s.%s", test_suite.name(), test_info.name());
-      printf("\n");
-    }
-  }
-}
-
-void PrettyUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                     int /*iteration*/) {
-  ColoredPrintf(COLOR_GREEN,  "[==========] ");
-  printf("%s from %s ran.",
-         FormatTestCount(unit_test.test_to_run_count()).c_str(),
-         FormatTestSuiteCount(unit_test.test_suite_to_run_count()).c_str());
-  if (GTEST_FLAG(print_time)) {
-    printf(" (%s ms total)",
-           internal::StreamableToString(unit_test.elapsed_time()).c_str());
-  }
-  printf("\n");
-  ColoredPrintf(COLOR_GREEN,  "[  PASSED  ] ");
-  printf("%s.\n", FormatTestCount(unit_test.successful_test_count()).c_str());
-
-  const int skipped_test_count = unit_test.skipped_test_count();
-  if (skipped_test_count > 0) {
-    ColoredPrintf(COLOR_GREEN, "[  SKIPPED ] ");
-    printf("%s, listed below:\n", FormatTestCount(skipped_test_count).c_str());
-    PrintSkippedTests(unit_test);
-  }
-
-  int num_failures = unit_test.failed_test_count();
-  if (!unit_test.Passed()) {
-    const int failed_test_count = unit_test.failed_test_count();
-    ColoredPrintf(COLOR_RED,  "[  FAILED  ] ");
-    printf("%s, listed below:\n", FormatTestCount(failed_test_count).c_str());
-    PrintFailedTests(unit_test);
-    printf("\n%2d FAILED %s\n", num_failures,
-                        num_failures == 1 ? "TEST" : "TESTS");
-  }
-
-  int num_disabled = unit_test.reportable_disabled_test_count();
-  if (num_disabled && !GTEST_FLAG(also_run_disabled_tests)) {
-    if (!num_failures) {
-      printf("\n");  // Add a spacer if no FAILURE banner is displayed.
-    }
-    ColoredPrintf(COLOR_YELLOW,
-                  "  YOU HAVE %d DISABLED %s\n\n",
-                  num_disabled,
-                  num_disabled == 1 ? "TEST" : "TESTS");
-  }
-  // Ensure that Google Test output is printed before, e.g., heapchecker output.
-  fflush(stdout);
-}
-
-// End PrettyUnitTestResultPrinter
-
-// class TestEventRepeater
-//
-// This class forwards events to other event listeners.
-class TestEventRepeater : public TestEventListener {
- public:
-  TestEventRepeater() : forwarding_enabled_(true) {}
-  ~TestEventRepeater() override;
-  void Append(TestEventListener *listener);
-  TestEventListener* Release(TestEventListener* listener);
-
-  // Controls whether events will be forwarded to listeners_. Set to false
-  // in death test child processes.
-  bool forwarding_enabled() const { return forwarding_enabled_; }
-  void set_forwarding_enabled(bool enable) { forwarding_enabled_ = enable; }
-
-  void OnTestProgramStart(const UnitTest& unit_test) override;
-  void OnTestIterationStart(const UnitTest& unit_test, int iteration) override;
-  void OnEnvironmentsSetUpStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) override;
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestSuite& parameter) override;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestSuiteStart(const TestSuite& parameter) override;
-  void OnTestStart(const TestInfo& test_info) override;
-  void OnTestPartResult(const TestPartResult& result) override;
-  void OnTestEnd(const TestInfo& test_info) override;
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& parameter) override;
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestSuiteEnd(const TestSuite& parameter) override;
-  void OnEnvironmentsTearDownStart(const UnitTest& unit_test) override;
-  void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) override;
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void OnTestProgramEnd(const UnitTest& unit_test) override;
-
- private:
-  // Controls whether events will be forwarded to listeners_. Set to false
-  // in death test child processes.
-  bool forwarding_enabled_;
-  // The list of listeners that receive events.
-  std::vector<TestEventListener*> listeners_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventRepeater);
-};
-
-TestEventRepeater::~TestEventRepeater() {
-  ForEach(listeners_, Delete<TestEventListener>);
-}
-
-void TestEventRepeater::Append(TestEventListener *listener) {
-  listeners_.push_back(listener);
-}
-
-TestEventListener* TestEventRepeater::Release(TestEventListener *listener) {
-  for (size_t i = 0; i < listeners_.size(); ++i) {
-    if (listeners_[i] == listener) {
-      listeners_.erase(listeners_.begin() + static_cast<int>(i));
-      return listener;
-    }
-  }
-
-  return nullptr;
-}
-
-// Since most methods are very similar, use macros to reduce boilerplate.
-// This defines a member that forwards the call to all listeners.
-#define GTEST_REPEATER_METHOD_(Name, Type) \
-void TestEventRepeater::Name(const Type& parameter) { \
-  if (forwarding_enabled_) { \
-    for (size_t i = 0; i < listeners_.size(); i++) { \
-      listeners_[i]->Name(parameter); \
-    } \
-  } \
-}
-// This defines a member that forwards the call to all listeners in reverse
-// order.
-#define GTEST_REVERSE_REPEATER_METHOD_(Name, Type)      \
-  void TestEventRepeater::Name(const Type& parameter) { \
-    if (forwarding_enabled_) {                          \
-      for (size_t i = listeners_.size(); i != 0; i--) { \
-        listeners_[i - 1]->Name(parameter);             \
-      }                                                 \
-    }                                                   \
-  }
-
-GTEST_REPEATER_METHOD_(OnTestProgramStart, UnitTest)
-GTEST_REPEATER_METHOD_(OnEnvironmentsSetUpStart, UnitTest)
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REPEATER_METHOD_(OnTestCaseStart, TestSuite)
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REPEATER_METHOD_(OnTestSuiteStart, TestSuite)
-GTEST_REPEATER_METHOD_(OnTestStart, TestInfo)
-GTEST_REPEATER_METHOD_(OnTestPartResult, TestPartResult)
-GTEST_REPEATER_METHOD_(OnEnvironmentsTearDownStart, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsSetUpEnd, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnEnvironmentsTearDownEnd, UnitTest)
-GTEST_REVERSE_REPEATER_METHOD_(OnTestEnd, TestInfo)
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REVERSE_REPEATER_METHOD_(OnTestCaseEnd, TestSuite)
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-GTEST_REVERSE_REPEATER_METHOD_(OnTestSuiteEnd, TestSuite)
-GTEST_REVERSE_REPEATER_METHOD_(OnTestProgramEnd, UnitTest)
-
-#undef GTEST_REPEATER_METHOD_
-#undef GTEST_REVERSE_REPEATER_METHOD_
-
-void TestEventRepeater::OnTestIterationStart(const UnitTest& unit_test,
-                                             int iteration) {
-  if (forwarding_enabled_) {
-    for (size_t i = 0; i < listeners_.size(); i++) {
-      listeners_[i]->OnTestIterationStart(unit_test, iteration);
-    }
-  }
-}
-
-void TestEventRepeater::OnTestIterationEnd(const UnitTest& unit_test,
-                                           int iteration) {
-  if (forwarding_enabled_) {
-    for (size_t i = listeners_.size(); i > 0; i--) {
-      listeners_[i - 1]->OnTestIterationEnd(unit_test, iteration);
-    }
-  }
-}
-
-// End TestEventRepeater
-
-// This class generates an XML output file.
-class XmlUnitTestResultPrinter : public EmptyTestEventListener {
- public:
-  explicit XmlUnitTestResultPrinter(const char* output_file);
-
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-  void ListTestsMatchingFilter(const std::vector<TestSuite*>& test_suites);
-
-  // Prints an XML summary of all unit tests.
-  static void PrintXmlTestsList(std::ostream* stream,
-                                const std::vector<TestSuite*>& test_suites);
-
- private:
-  // Is c a whitespace character that is normalized to a space character
-  // when it appears in an XML attribute value?
-  static bool IsNormalizableWhitespace(char c) {
-    return c == 0x9 || c == 0xA || c == 0xD;
-  }
-
-  // May c appear in a well-formed XML document?
-  static bool IsValidXmlCharacter(char c) {
-    return IsNormalizableWhitespace(c) || c >= 0x20;
-  }
-
-  // Returns an XML-escaped copy of the input string str.  If
-  // is_attribute is true, the text is meant to appear as an attribute
-  // value, and normalizable whitespace is preserved by replacing it
-  // with character references.
-  static std::string EscapeXml(const std::string& str, bool is_attribute);
-
-  // Returns the given string with all characters invalid in XML removed.
-  static std::string RemoveInvalidXmlCharacters(const std::string& str);
-
-  // Convenience wrapper around EscapeXml when str is an attribute value.
-  static std::string EscapeXmlAttribute(const std::string& str) {
-    return EscapeXml(str, true);
-  }
-
-  // Convenience wrapper around EscapeXml when str is not an attribute value.
-  static std::string EscapeXmlText(const char* str) {
-    return EscapeXml(str, false);
-  }
-
-  // Verifies that the given attribute belongs to the given element and
-  // streams the attribute as XML.
-  static void OutputXmlAttribute(std::ostream* stream,
-                                 const std::string& element_name,
-                                 const std::string& name,
-                                 const std::string& value);
-
-  // Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
-  static void OutputXmlCDataSection(::std::ostream* stream, const char* data);
-
-  // Streams an XML representation of a TestInfo object.
-  static void OutputXmlTestInfo(::std::ostream* stream,
-                                const char* test_suite_name,
-                                const TestInfo& test_info);
-
-  // Prints an XML representation of a TestSuite object
-  static void PrintXmlTestSuite(::std::ostream* stream,
-                                const TestSuite& test_suite);
-
-  // Prints an XML summary of unit_test to output stream out.
-  static void PrintXmlUnitTest(::std::ostream* stream,
-                               const UnitTest& unit_test);
-
-  // Produces a string representing the test properties in a result as space
-  // delimited XML attributes based on the property key="value" pairs.
-  // When the std::string is not empty, it includes a space at the beginning,
-  // to delimit this attribute from prior attributes.
-  static std::string TestPropertiesAsXmlAttributes(const TestResult& result);
-
-  // Streams an XML representation of the test properties of a TestResult
-  // object.
-  static void OutputXmlTestProperties(std::ostream* stream,
-                                      const TestResult& result);
-
-  // The output file.
-  const std::string output_file_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(XmlUnitTestResultPrinter);
-};
-
-// Creates a new XmlUnitTestResultPrinter.
-XmlUnitTestResultPrinter::XmlUnitTestResultPrinter(const char* output_file)
-    : output_file_(output_file) {
-  if (output_file_.empty()) {
-    GTEST_LOG_(FATAL) << "XML output file may not be null";
-  }
-}
-
-// Called after the unit test ends.
-void XmlUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                  int /*iteration*/) {
-  FILE* xmlout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintXmlUnitTest(&stream, unit_test);
-  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
-  fclose(xmlout);
-}
-
-void XmlUnitTestResultPrinter::ListTestsMatchingFilter(
-    const std::vector<TestSuite*>& test_suites) {
-  FILE* xmlout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintXmlTestsList(&stream, test_suites);
-  fprintf(xmlout, "%s", StringStreamToString(&stream).c_str());
-  fclose(xmlout);
-}
-
-// Returns an XML-escaped copy of the input string str.  If is_attribute
-// is true, the text is meant to appear as an attribute value, and
-// normalizable whitespace is preserved by replacing it with character
-// references.
-//
-// Invalid XML characters in str, if any, are stripped from the output.
-// It is expected that most, if not all, of the text processed by this
-// module will consist of ordinary English text.
-// If this module is ever modified to produce version 1.1 XML output,
-// most invalid characters can be retained using character references.
-std::string XmlUnitTestResultPrinter::EscapeXml(
-    const std::string& str, bool is_attribute) {
-  Message m;
-
-  for (size_t i = 0; i < str.size(); ++i) {
-    const char ch = str[i];
-    switch (ch) {
-      case '<':
-        m << "&lt;";
-        break;
-      case '>':
-        m << "&gt;";
-        break;
-      case '&':
-        m << "&amp;";
-        break;
-      case '\'':
-        if (is_attribute)
-          m << "&apos;";
-        else
-          m << '\'';
-        break;
-      case '"':
-        if (is_attribute)
-          m << "&quot;";
-        else
-          m << '"';
-        break;
-      default:
-        if (IsValidXmlCharacter(ch)) {
-          if (is_attribute && IsNormalizableWhitespace(ch))
-            m << "&#x" << String::FormatByte(static_cast<unsigned char>(ch))
-              << ";";
-          else
-            m << ch;
-        }
-        break;
-    }
-  }
-
-  return m.GetString();
-}
-
-// Returns the given string with all characters invalid in XML removed.
-// Currently invalid characters are dropped from the string. An
-// alternative is to replace them with certain characters such as . or ?.
-std::string XmlUnitTestResultPrinter::RemoveInvalidXmlCharacters(
-    const std::string& str) {
-  std::string output;
-  output.reserve(str.size());
-  for (std::string::const_iterator it = str.begin(); it != str.end(); ++it)
-    if (IsValidXmlCharacter(*it))
-      output.push_back(*it);
-
-  return output;
-}
-
-// The following routines generate an XML representation of a UnitTest
-// object.
-// GOOGLETEST_CM0009 DO NOT DELETE
-//
-// This is how Google Test concepts map to the DTD:
-//
-// <testsuites name="AllTests">        <-- corresponds to a UnitTest object
-//   <testsuite name="testcase-name">  <-- corresponds to a TestSuite object
-//     <testcase name="test-name">     <-- corresponds to a TestInfo object
-//       <failure message="...">...</failure>
-//       <failure message="...">...</failure>
-//       <failure message="...">...</failure>
-//                                     <-- individual assertion failures
-//     </testcase>
-//   </testsuite>
-// </testsuites>
-
-// Formats the given time in milliseconds as seconds.
-std::string FormatTimeInMillisAsSeconds(TimeInMillis ms) {
-  ::std::stringstream ss;
-  ss << (static_cast<double>(ms) * 1e-3);
-  return ss.str();
-}
-
-static bool PortableLocaltime(time_t seconds, struct tm* out) {
-#if defined(_MSC_VER)
-  return localtime_s(out, &seconds) == 0;
-#elif defined(__MINGW32__) || defined(__MINGW64__)
-  // MINGW <time.h> provides neither localtime_r nor localtime_s, but uses
-  // Windows' localtime(), which has a thread-local tm buffer.
-  struct tm* tm_ptr = localtime(&seconds);  // NOLINT
-  if (tm_ptr == nullptr) return false;
-  *out = *tm_ptr;
-  return true;
-#else
-  return localtime_r(&seconds, out) != nullptr;
-#endif
-}
-
-// Converts the given epoch time in milliseconds to a date string in the ISO
-// 8601 format, without the timezone information.
-std::string FormatEpochTimeInMillisAsIso8601(TimeInMillis ms) {
-  struct tm time_struct;
-  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
-    return "";
-  // YYYY-MM-DDThh:mm:ss
-  return StreamableToString(time_struct.tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct.tm_min) + ":" +
-      String::FormatIntWidth2(time_struct.tm_sec);
-}
-
-// Streams an XML CDATA section, escaping invalid CDATA sequences as needed.
-void XmlUnitTestResultPrinter::OutputXmlCDataSection(::std::ostream* stream,
-                                                     const char* data) {
-  const char* segment = data;
-  *stream << "<![CDATA[";
-  for (;;) {
-    const char* const next_segment = strstr(segment, "]]>");
-    if (next_segment != nullptr) {
-      stream->write(
-          segment, static_cast<std::streamsize>(next_segment - segment));
-      *stream << "]]>]]&gt;<![CDATA[";
-      segment = next_segment + strlen("]]>");
-    } else {
-      *stream << segment;
-      break;
-    }
-  }
-  *stream << "]]>";
-}
-
-void XmlUnitTestResultPrinter::OutputXmlAttribute(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    const std::string& value) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Attribute " << name << " is not allowed for element <" << element_name
-      << ">.";
-
-  *stream << " " << name << "=\"" << EscapeXmlAttribute(value) << "\"";
-}
-
-// Prints an XML representation of a TestInfo object.
-void XmlUnitTestResultPrinter::OutputXmlTestInfo(::std::ostream* stream,
-                                                 const char* test_suite_name,
-                                                 const TestInfo& test_info) {
-  const TestResult& result = *test_info.result();
-  const std::string kTestsuite = "testcase";
-
-  if (test_info.is_in_another_shard()) {
-    return;
-  }
-
-  *stream << "    <testcase";
-  OutputXmlAttribute(stream, kTestsuite, "name", test_info.name());
-
-  if (test_info.value_param() != nullptr) {
-    OutputXmlAttribute(stream, kTestsuite, "value_param",
-                       test_info.value_param());
-  }
-  if (test_info.type_param() != nullptr) {
-    OutputXmlAttribute(stream, kTestsuite, "type_param",
-                       test_info.type_param());
-  }
-  if (GTEST_FLAG(list_tests)) {
-    OutputXmlAttribute(stream, kTestsuite, "file", test_info.file());
-    OutputXmlAttribute(stream, kTestsuite, "line",
-                       StreamableToString(test_info.line()));
-    *stream << " />\n";
-    return;
-  }
-
-  OutputXmlAttribute(stream, kTestsuite, "status",
-                     test_info.should_run() ? "run" : "notrun");
-  OutputXmlAttribute(stream, kTestsuite, "result",
-                     test_info.should_run()
-                         ? (result.Skipped() ? "skipped" : "completed")
-                         : "suppressed");
-  OutputXmlAttribute(stream, kTestsuite, "time",
-                     FormatTimeInMillisAsSeconds(result.elapsed_time()));
-  OutputXmlAttribute(
-      stream, kTestsuite, "timestamp",
-      FormatEpochTimeInMillisAsIso8601(result.start_timestamp()));
-  OutputXmlAttribute(stream, kTestsuite, "classname", test_suite_name);
-
-  int failures = 0;
-  for (int i = 0; i < result.total_part_count(); ++i) {
-    const TestPartResult& part = result.GetTestPartResult(i);
-    if (part.failed()) {
-      if (++failures == 1) {
-        *stream << ">\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string summary = location + "\n" + part.summary();
-      *stream << "      <failure message=\""
-              << EscapeXmlAttribute(summary.c_str())
-              << "\" type=\"\">";
-      const std::string detail = location + "\n" + part.message();
-      OutputXmlCDataSection(stream, RemoveInvalidXmlCharacters(detail).c_str());
-      *stream << "</failure>\n";
-    }
-  }
-
-  if (failures == 0 && result.test_property_count() == 0) {
-    *stream << " />\n";
-  } else {
-    if (failures == 0) {
-      *stream << ">\n";
-    }
-    OutputXmlTestProperties(stream, result);
-    *stream << "    </testcase>\n";
-  }
-}
-
-// Prints an XML representation of a TestSuite object
-void XmlUnitTestResultPrinter::PrintXmlTestSuite(std::ostream* stream,
-                                                 const TestSuite& test_suite) {
-  const std::string kTestsuite = "testsuite";
-  *stream << "  <" << kTestsuite;
-  OutputXmlAttribute(stream, kTestsuite, "name", test_suite.name());
-  OutputXmlAttribute(stream, kTestsuite, "tests",
-                     StreamableToString(test_suite.reportable_test_count()));
-  if (!GTEST_FLAG(list_tests)) {
-    OutputXmlAttribute(stream, kTestsuite, "failures",
-                       StreamableToString(test_suite.failed_test_count()));
-    OutputXmlAttribute(
-        stream, kTestsuite, "disabled",
-        StreamableToString(test_suite.reportable_disabled_test_count()));
-    OutputXmlAttribute(stream, kTestsuite, "errors", "0");
-    OutputXmlAttribute(stream, kTestsuite, "time",
-                       FormatTimeInMillisAsSeconds(test_suite.elapsed_time()));
-    OutputXmlAttribute(
-        stream, kTestsuite, "timestamp",
-        FormatEpochTimeInMillisAsIso8601(test_suite.start_timestamp()));
-    *stream << TestPropertiesAsXmlAttributes(test_suite.ad_hoc_test_result());
-  }
-  *stream << ">\n";
-  for (int i = 0; i < test_suite.total_test_count(); ++i) {
-    if (test_suite.GetTestInfo(i)->is_reportable())
-      OutputXmlTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
-  }
-  *stream << "  </" << kTestsuite << ">\n";
-}
-
-// Prints an XML summary of unit_test to output stream out.
-void XmlUnitTestResultPrinter::PrintXmlUnitTest(std::ostream* stream,
-                                                const UnitTest& unit_test) {
-  const std::string kTestsuites = "testsuites";
-
-  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  *stream << "<" << kTestsuites;
-
-  OutputXmlAttribute(stream, kTestsuites, "tests",
-                     StreamableToString(unit_test.reportable_test_count()));
-  OutputXmlAttribute(stream, kTestsuites, "failures",
-                     StreamableToString(unit_test.failed_test_count()));
-  OutputXmlAttribute(
-      stream, kTestsuites, "disabled",
-      StreamableToString(unit_test.reportable_disabled_test_count()));
-  OutputXmlAttribute(stream, kTestsuites, "errors", "0");
-  OutputXmlAttribute(stream, kTestsuites, "time",
-                     FormatTimeInMillisAsSeconds(unit_test.elapsed_time()));
-  OutputXmlAttribute(
-      stream, kTestsuites, "timestamp",
-      FormatEpochTimeInMillisAsIso8601(unit_test.start_timestamp()));
-
-  if (GTEST_FLAG(shuffle)) {
-    OutputXmlAttribute(stream, kTestsuites, "random_seed",
-                       StreamableToString(unit_test.random_seed()));
-  }
-  *stream << TestPropertiesAsXmlAttributes(unit_test.ad_hoc_test_result());
-
-  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
-  *stream << ">\n";
-
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0)
-      PrintXmlTestSuite(stream, *unit_test.GetTestSuite(i));
-  }
-  *stream << "</" << kTestsuites << ">\n";
-}
-
-void XmlUnitTestResultPrinter::PrintXmlTestsList(
-    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
-  const std::string kTestsuites = "testsuites";
-
-  *stream << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  *stream << "<" << kTestsuites;
-
-  int total_tests = 0;
-  for (auto test_suite : test_suites) {
-    total_tests += test_suite->total_test_count();
-  }
-  OutputXmlAttribute(stream, kTestsuites, "tests",
-                     StreamableToString(total_tests));
-  OutputXmlAttribute(stream, kTestsuites, "name", "AllTests");
-  *stream << ">\n";
-
-  for (auto test_suite : test_suites) {
-    PrintXmlTestSuite(stream, *test_suite);
-  }
-  *stream << "</" << kTestsuites << ">\n";
-}
-
-// Produces a string representing the test properties in a result as space
-// delimited XML attributes based on the property key="value" pairs.
-std::string XmlUnitTestResultPrinter::TestPropertiesAsXmlAttributes(
-    const TestResult& result) {
-  Message attributes;
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    attributes << " " << property.key() << "="
-        << "\"" << EscapeXmlAttribute(property.value()) << "\"";
-  }
-  return attributes.GetString();
-}
-
-void XmlUnitTestResultPrinter::OutputXmlTestProperties(
-    std::ostream* stream, const TestResult& result) {
-  const std::string kProperties = "properties";
-  const std::string kProperty = "property";
-
-  if (result.test_property_count() <= 0) {
-    return;
-  }
-
-  *stream << "<" << kProperties << ">\n";
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    *stream << "<" << kProperty;
-    *stream << " name=\"" << EscapeXmlAttribute(property.key()) << "\"";
-    *stream << " value=\"" << EscapeXmlAttribute(property.value()) << "\"";
-    *stream << "/>\n";
-  }
-  *stream << "</" << kProperties << ">\n";
-}
-
-// End XmlUnitTestResultPrinter
-
-// This class generates an JSON output file.
-class JsonUnitTestResultPrinter : public EmptyTestEventListener {
- public:
-  explicit JsonUnitTestResultPrinter(const char* output_file);
-
-  void OnTestIterationEnd(const UnitTest& unit_test, int iteration) override;
-
-  // Prints an JSON summary of all unit tests.
-  static void PrintJsonTestList(::std::ostream* stream,
-                                const std::vector<TestSuite*>& test_suites);
-
- private:
-  // Returns an JSON-escaped copy of the input string str.
-  static std::string EscapeJson(const std::string& str);
-
-  //// Verifies that the given attribute belongs to the given element and
-  //// streams the attribute as JSON.
-  static void OutputJsonKey(std::ostream* stream,
-                            const std::string& element_name,
-                            const std::string& name,
-                            const std::string& value,
-                            const std::string& indent,
-                            bool comma = true);
-  static void OutputJsonKey(std::ostream* stream,
-                            const std::string& element_name,
-                            const std::string& name,
-                            int value,
-                            const std::string& indent,
-                            bool comma = true);
-
-  // Streams a JSON representation of a TestInfo object.
-  static void OutputJsonTestInfo(::std::ostream* stream,
-                                 const char* test_suite_name,
-                                 const TestInfo& test_info);
-
-  // Prints a JSON representation of a TestSuite object
-  static void PrintJsonTestSuite(::std::ostream* stream,
-                                 const TestSuite& test_suite);
-
-  // Prints a JSON summary of unit_test to output stream out.
-  static void PrintJsonUnitTest(::std::ostream* stream,
-                                const UnitTest& unit_test);
-
-  // Produces a string representing the test properties in a result as
-  // a JSON dictionary.
-  static std::string TestPropertiesAsJson(const TestResult& result,
-                                          const std::string& indent);
-
-  // The output file.
-  const std::string output_file_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(JsonUnitTestResultPrinter);
-};
-
-// Creates a new JsonUnitTestResultPrinter.
-JsonUnitTestResultPrinter::JsonUnitTestResultPrinter(const char* output_file)
-    : output_file_(output_file) {
-  if (output_file_.empty()) {
-    GTEST_LOG_(FATAL) << "JSON output file may not be null";
-  }
-}
-
-void JsonUnitTestResultPrinter::OnTestIterationEnd(const UnitTest& unit_test,
-                                                  int /*iteration*/) {
-  FILE* jsonout = OpenFileForWriting(output_file_);
-  std::stringstream stream;
-  PrintJsonUnitTest(&stream, unit_test);
-  fprintf(jsonout, "%s", StringStreamToString(&stream).c_str());
-  fclose(jsonout);
-}
-
-// Returns an JSON-escaped copy of the input string str.
-std::string JsonUnitTestResultPrinter::EscapeJson(const std::string& str) {
-  Message m;
-
-  for (size_t i = 0; i < str.size(); ++i) {
-    const char ch = str[i];
-    switch (ch) {
-      case '\\':
-      case '"':
-      case '/':
-        m << '\\' << ch;
-        break;
-      case '\b':
-        m << "\\b";
-        break;
-      case '\t':
-        m << "\\t";
-        break;
-      case '\n':
-        m << "\\n";
-        break;
-      case '\f':
-        m << "\\f";
-        break;
-      case '\r':
-        m << "\\r";
-        break;
-      default:
-        if (ch < ' ') {
-          m << "\\u00" << String::FormatByte(static_cast<unsigned char>(ch));
-        } else {
-          m << ch;
-        }
-        break;
-    }
-  }
-
-  return m.GetString();
-}
-
-// The following routines generate an JSON representation of a UnitTest
-// object.
-
-// Formats the given time in milliseconds as seconds.
-static std::string FormatTimeInMillisAsDuration(TimeInMillis ms) {
-  ::std::stringstream ss;
-  ss << (static_cast<double>(ms) * 1e-3) << "s";
-  return ss.str();
-}
-
-// Converts the given epoch time in milliseconds to a date string in the
-// RFC3339 format, without the timezone information.
-static std::string FormatEpochTimeInMillisAsRFC3339(TimeInMillis ms) {
-  struct tm time_struct;
-  if (!PortableLocaltime(static_cast<time_t>(ms / 1000), &time_struct))
-    return "";
-  // YYYY-MM-DDThh:mm:ss
-  return StreamableToString(time_struct.tm_year + 1900) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mon + 1) + "-" +
-      String::FormatIntWidth2(time_struct.tm_mday) + "T" +
-      String::FormatIntWidth2(time_struct.tm_hour) + ":" +
-      String::FormatIntWidth2(time_struct.tm_min) + ":" +
-      String::FormatIntWidth2(time_struct.tm_sec) + "Z";
-}
-
-static inline std::string Indent(size_t width) {
-  return std::string(width, ' ');
-}
-
-void JsonUnitTestResultPrinter::OutputJsonKey(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    const std::string& value,
-    const std::string& indent,
-    bool comma) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Key \"" << name << "\" is not allowed for value \"" << element_name
-      << "\".";
-
-  *stream << indent << "\"" << name << "\": \"" << EscapeJson(value) << "\"";
-  if (comma)
-    *stream << ",\n";
-}
-
-void JsonUnitTestResultPrinter::OutputJsonKey(
-    std::ostream* stream,
-    const std::string& element_name,
-    const std::string& name,
-    int value,
-    const std::string& indent,
-    bool comma) {
-  const std::vector<std::string>& allowed_names =
-      GetReservedOutputAttributesForElement(element_name);
-
-  GTEST_CHECK_(std::find(allowed_names.begin(), allowed_names.end(), name) !=
-                   allowed_names.end())
-      << "Key \"" << name << "\" is not allowed for value \"" << element_name
-      << "\".";
-
-  *stream << indent << "\"" << name << "\": " << StreamableToString(value);
-  if (comma)
-    *stream << ",\n";
-}
-
-// Prints a JSON representation of a TestInfo object.
-void JsonUnitTestResultPrinter::OutputJsonTestInfo(::std::ostream* stream,
-                                                   const char* test_suite_name,
-                                                   const TestInfo& test_info) {
-  const TestResult& result = *test_info.result();
-  const std::string kTestsuite = "testcase";
-  const std::string kIndent = Indent(10);
-
-  *stream << Indent(8) << "{\n";
-  OutputJsonKey(stream, kTestsuite, "name", test_info.name(), kIndent);
-
-  if (test_info.value_param() != nullptr) {
-    OutputJsonKey(stream, kTestsuite, "value_param", test_info.value_param(),
-                  kIndent);
-  }
-  if (test_info.type_param() != nullptr) {
-    OutputJsonKey(stream, kTestsuite, "type_param", test_info.type_param(),
-                  kIndent);
-  }
-  if (GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, kTestsuite, "file", test_info.file(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "line", test_info.line(), kIndent, false);
-    *stream << "\n" << Indent(8) << "}";
-    return;
-  }
-
-  OutputJsonKey(stream, kTestsuite, "status",
-                test_info.should_run() ? "RUN" : "NOTRUN", kIndent);
-  OutputJsonKey(stream, kTestsuite, "result",
-                test_info.should_run()
-                    ? (result.Skipped() ? "SKIPPED" : "COMPLETED")
-                    : "SUPPRESSED",
-                kIndent);
-  OutputJsonKey(stream, kTestsuite, "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(result.start_timestamp()),
-                kIndent);
-  OutputJsonKey(stream, kTestsuite, "time",
-                FormatTimeInMillisAsDuration(result.elapsed_time()), kIndent);
-  OutputJsonKey(stream, kTestsuite, "classname", test_suite_name, kIndent,
-                false);
-  *stream << TestPropertiesAsJson(result, kIndent);
-
-  int failures = 0;
-  for (int i = 0; i < result.total_part_count(); ++i) {
-    const TestPartResult& part = result.GetTestPartResult(i);
-    if (part.failed()) {
-      *stream << ",\n";
-      if (++failures == 1) {
-        *stream << kIndent << "\"" << "failures" << "\": [\n";
-      }
-      const std::string location =
-          internal::FormatCompilerIndependentFileLocation(part.file_name(),
-                                                          part.line_number());
-      const std::string message = EscapeJson(location + "\n" + part.message());
-      *stream << kIndent << "  {\n"
-              << kIndent << "    \"failure\": \"" << message << "\",\n"
-              << kIndent << "    \"type\": \"\"\n"
-              << kIndent << "  }";
-    }
-  }
-
-  if (failures > 0)
-    *stream << "\n" << kIndent << "]";
-  *stream << "\n" << Indent(8) << "}";
-}
-
-// Prints an JSON representation of a TestSuite object
-void JsonUnitTestResultPrinter::PrintJsonTestSuite(
-    std::ostream* stream, const TestSuite& test_suite) {
-  const std::string kTestsuite = "testsuite";
-  const std::string kIndent = Indent(6);
-
-  *stream << Indent(4) << "{\n";
-  OutputJsonKey(stream, kTestsuite, "name", test_suite.name(), kIndent);
-  OutputJsonKey(stream, kTestsuite, "tests", test_suite.reportable_test_count(),
-                kIndent);
-  if (!GTEST_FLAG(list_tests)) {
-    OutputJsonKey(stream, kTestsuite, "failures",
-                  test_suite.failed_test_count(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "disabled",
-                  test_suite.reportable_disabled_test_count(), kIndent);
-    OutputJsonKey(stream, kTestsuite, "errors", 0, kIndent);
-    OutputJsonKey(
-        stream, kTestsuite, "timestamp",
-        FormatEpochTimeInMillisAsRFC3339(test_suite.start_timestamp()),
-        kIndent);
-    OutputJsonKey(stream, kTestsuite, "time",
-                  FormatTimeInMillisAsDuration(test_suite.elapsed_time()),
-                  kIndent, false);
-    *stream << TestPropertiesAsJson(test_suite.ad_hoc_test_result(), kIndent)
-            << ",\n";
-  }
-
-  *stream << kIndent << "\"" << kTestsuite << "\": [\n";
-
-  bool comma = false;
-  for (int i = 0; i < test_suite.total_test_count(); ++i) {
-    if (test_suite.GetTestInfo(i)->is_reportable()) {
-      if (comma) {
-        *stream << ",\n";
-      } else {
-        comma = true;
-      }
-      OutputJsonTestInfo(stream, test_suite.name(), *test_suite.GetTestInfo(i));
-    }
-  }
-  *stream << "\n" << kIndent << "]\n" << Indent(4) << "}";
-}
-
-// Prints a JSON summary of unit_test to output stream out.
-void JsonUnitTestResultPrinter::PrintJsonUnitTest(std::ostream* stream,
-                                                  const UnitTest& unit_test) {
-  const std::string kTestsuites = "testsuites";
-  const std::string kIndent = Indent(2);
-  *stream << "{\n";
-
-  OutputJsonKey(stream, kTestsuites, "tests", unit_test.reportable_test_count(),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "failures", unit_test.failed_test_count(),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "disabled",
-                unit_test.reportable_disabled_test_count(), kIndent);
-  OutputJsonKey(stream, kTestsuites, "errors", 0, kIndent);
-  if (GTEST_FLAG(shuffle)) {
-    OutputJsonKey(stream, kTestsuites, "random_seed", unit_test.random_seed(),
-                  kIndent);
-  }
-  OutputJsonKey(stream, kTestsuites, "timestamp",
-                FormatEpochTimeInMillisAsRFC3339(unit_test.start_timestamp()),
-                kIndent);
-  OutputJsonKey(stream, kTestsuites, "time",
-                FormatTimeInMillisAsDuration(unit_test.elapsed_time()), kIndent,
-                false);
-
-  *stream << TestPropertiesAsJson(unit_test.ad_hoc_test_result(), kIndent)
-          << ",\n";
-
-  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
-  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
-
-  bool comma = false;
-  for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-    if (unit_test.GetTestSuite(i)->reportable_test_count() > 0) {
-      if (comma) {
-        *stream << ",\n";
-      } else {
-        comma = true;
-      }
-      PrintJsonTestSuite(stream, *unit_test.GetTestSuite(i));
-    }
-  }
-
-  *stream << "\n" << kIndent << "]\n" << "}\n";
-}
-
-void JsonUnitTestResultPrinter::PrintJsonTestList(
-    std::ostream* stream, const std::vector<TestSuite*>& test_suites) {
-  const std::string kTestsuites = "testsuites";
-  const std::string kIndent = Indent(2);
-  *stream << "{\n";
-  int total_tests = 0;
-  for (auto test_suite : test_suites) {
-    total_tests += test_suite->total_test_count();
-  }
-  OutputJsonKey(stream, kTestsuites, "tests", total_tests, kIndent);
-
-  OutputJsonKey(stream, kTestsuites, "name", "AllTests", kIndent);
-  *stream << kIndent << "\"" << kTestsuites << "\": [\n";
-
-  for (size_t i = 0; i < test_suites.size(); ++i) {
-    if (i != 0) {
-      *stream << ",\n";
-    }
-    PrintJsonTestSuite(stream, *test_suites[i]);
-  }
-
-  *stream << "\n"
-          << kIndent << "]\n"
-          << "}\n";
-}
-// Produces a string representing the test properties in a result as
-// a JSON dictionary.
-std::string JsonUnitTestResultPrinter::TestPropertiesAsJson(
-    const TestResult& result, const std::string& indent) {
-  Message attributes;
-  for (int i = 0; i < result.test_property_count(); ++i) {
-    const TestProperty& property = result.GetTestProperty(i);
-    attributes << ",\n" << indent << "\"" << property.key() << "\": "
-               << "\"" << EscapeJson(property.value()) << "\"";
-  }
-  return attributes.GetString();
-}
-
-// End JsonUnitTestResultPrinter
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-// Checks if str contains '=', '&', '%' or '\n' characters. If yes,
-// replaces them by "%xx" where xx is their hexadecimal value. For
-// example, replaces "=" with "%3D".  This algorithm is O(strlen(str))
-// in both time and space -- important as the input str may contain an
-// arbitrarily long test failure message and stack trace.
-std::string StreamingListener::UrlEncode(const char* str) {
-  std::string result;
-  result.reserve(strlen(str) + 1);
-  for (char ch = *str; ch != '\0'; ch = *++str) {
-    switch (ch) {
-      case '%':
-      case '=':
-      case '&':
-      case '\n':
-        result.append("%" + String::FormatByte(static_cast<unsigned char>(ch)));
-        break;
-      default:
-        result.push_back(ch);
-        break;
-    }
-  }
-  return result;
-}
-
-void StreamingListener::SocketWriter::MakeConnection() {
-  GTEST_CHECK_(sockfd_ == -1)
-      << "MakeConnection() can't be called when there is already a connection.";
-
-  addrinfo hints;
-  memset(&hints, 0, sizeof(hints));
-  hints.ai_family = AF_UNSPEC;    // To allow both IPv4 and IPv6 addresses.
-  hints.ai_socktype = SOCK_STREAM;
-  addrinfo* servinfo = nullptr;
-
-  // Use the getaddrinfo() to get a linked list of IP addresses for
-  // the given host name.
-  const int error_num = getaddrinfo(
-      host_name_.c_str(), port_num_.c_str(), &hints, &servinfo);
-  if (error_num != 0) {
-    GTEST_LOG_(WARNING) << "stream_result_to: getaddrinfo() failed: "
-                        << gai_strerror(error_num);
-  }
-
-  // Loop through all the results and connect to the first we can.
-  for (addrinfo* cur_addr = servinfo; sockfd_ == -1 && cur_addr != nullptr;
-       cur_addr = cur_addr->ai_next) {
-    sockfd_ = socket(
-        cur_addr->ai_family, cur_addr->ai_socktype, cur_addr->ai_protocol);
-    if (sockfd_ != -1) {
-      // Connect the client socket to the server socket.
-      if (connect(sockfd_, cur_addr->ai_addr, cur_addr->ai_addrlen) == -1) {
-        close(sockfd_);
-        sockfd_ = -1;
-      }
-    }
-  }
-
-  freeaddrinfo(servinfo);  // all done with this structure
-
-  if (sockfd_ == -1) {
-    GTEST_LOG_(WARNING) << "stream_result_to: failed to connect to "
-                        << host_name_ << ":" << port_num_;
-  }
-}
-
-// End of class Streaming Listener
-#endif  // GTEST_CAN_STREAM_RESULTS__
-
-// class OsStackTraceGetter
-
-const char* const OsStackTraceGetterInterface::kElidedFramesMarker =
-    "... " GTEST_NAME_ " internal frames ...";
-
-std::string OsStackTraceGetter::CurrentStackTrace(int max_depth, int skip_count)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-#if GTEST_HAS_ABSL
-  std::string result;
-
-  if (max_depth <= 0) {
-    return result;
-  }
-
-  max_depth = std::min(max_depth, kMaxStackTraceDepth);
-
-  std::vector<void*> raw_stack(max_depth);
-  // Skips the frames requested by the caller, plus this function.
-  const int raw_stack_size =
-      absl::GetStackTrace(&raw_stack[0], max_depth, skip_count + 1);
-
-  void* caller_frame = nullptr;
-  {
-    MutexLock lock(&mutex_);
-    caller_frame = caller_frame_;
-  }
-
-  for (int i = 0; i < raw_stack_size; ++i) {
-    if (raw_stack[i] == caller_frame &&
-        !GTEST_FLAG(show_internal_stack_frames)) {
-      // Add a marker to the trace and stop adding frames.
-      absl::StrAppend(&result, kElidedFramesMarker, "\n");
-      break;
-    }
-
-    char tmp[1024];
-    const char* symbol = "(unknown)";
-    if (absl::Symbolize(raw_stack[i], tmp, sizeof(tmp))) {
-      symbol = tmp;
-    }
-
-    char line[1024];
-    snprintf(line, sizeof(line), "  %p: %s\n", raw_stack[i], symbol);
-    result += line;
-  }
-
-  return result;
-
-#else  // !GTEST_HAS_ABSL
-  static_cast<void>(max_depth);
-  static_cast<void>(skip_count);
-  return "";
-#endif  // GTEST_HAS_ABSL
-}
-
-void OsStackTraceGetter::UponLeavingGTest() GTEST_LOCK_EXCLUDED_(mutex_) {
-#if GTEST_HAS_ABSL
-  void* caller_frame = nullptr;
-  if (absl::GetStackTrace(&caller_frame, 1, 3) <= 0) {
-    caller_frame = nullptr;
-  }
-
-  MutexLock lock(&mutex_);
-  caller_frame_ = caller_frame;
-#endif  // GTEST_HAS_ABSL
-}
-
-// A helper class that creates the premature-exit file in its
-// constructor and deletes the file in its destructor.
-class ScopedPrematureExitFile {
- public:
-  explicit ScopedPrematureExitFile(const char* premature_exit_filepath)
-      : premature_exit_filepath_(premature_exit_filepath ?
-                                 premature_exit_filepath : "") {
-    // If a path to the premature-exit file is specified...
-    if (!premature_exit_filepath_.empty()) {
-      // create the file with a single "0" character in it.  I/O
-      // errors are ignored as there's nothing better we can do and we
-      // don't want to fail the test because of this.
-      FILE* pfile = posix::FOpen(premature_exit_filepath, "w");
-      fwrite("0", 1, 1, pfile);
-      fclose(pfile);
-    }
-  }
-
-  ~ScopedPrematureExitFile() {
-    if (!premature_exit_filepath_.empty()) {
-      int retval = remove(premature_exit_filepath_.c_str());
-      if (retval) {
-        GTEST_LOG_(ERROR) << "Failed to remove premature exit filepath \""
-                          << premature_exit_filepath_ << "\" with error "
-                          << retval;
-      }
-    }
-  }
-
- private:
-  const std::string premature_exit_filepath_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(ScopedPrematureExitFile);
-};
-
-}  // namespace internal
-
-// class TestEventListeners
-
-TestEventListeners::TestEventListeners()
-    : repeater_(new internal::TestEventRepeater()),
-      default_result_printer_(nullptr),
-      default_xml_generator_(nullptr) {}
-
-TestEventListeners::~TestEventListeners() { delete repeater_; }
-
-// Returns the standard listener responsible for the default console
-// output.  Can be removed from the listeners list to shut down default
-// console output.  Note that removing this object from the listener list
-// with Release transfers its ownership to the user.
-void TestEventListeners::Append(TestEventListener* listener) {
-  repeater_->Append(listener);
-}
-
-// Removes the given event listener from the list and returns it.  It then
-// becomes the caller's responsibility to delete the listener. Returns
-// NULL if the listener is not found in the list.
-TestEventListener* TestEventListeners::Release(TestEventListener* listener) {
-  if (listener == default_result_printer_)
-    default_result_printer_ = nullptr;
-  else if (listener == default_xml_generator_)
-    default_xml_generator_ = nullptr;
-  return repeater_->Release(listener);
-}
-
-// Returns repeater that broadcasts the TestEventListener events to all
-// subscribers.
-TestEventListener* TestEventListeners::repeater() { return repeater_; }
-
-// Sets the default_result_printer attribute to the provided listener.
-// The listener is also added to the listener list and previous
-// default_result_printer is removed from it and deleted. The listener can
-// also be NULL in which case it will not be added to the list. Does
-// nothing if the previous and the current listener objects are the same.
-void TestEventListeners::SetDefaultResultPrinter(TestEventListener* listener) {
-  if (default_result_printer_ != listener) {
-    // It is an error to pass this method a listener that is already in the
-    // list.
-    delete Release(default_result_printer_);
-    default_result_printer_ = listener;
-    if (listener != nullptr) Append(listener);
-  }
-}
-
-// Sets the default_xml_generator attribute to the provided listener.  The
-// listener is also added to the listener list and previous
-// default_xml_generator is removed from it and deleted. The listener can
-// also be NULL in which case it will not be added to the list. Does
-// nothing if the previous and the current listener objects are the same.
-void TestEventListeners::SetDefaultXmlGenerator(TestEventListener* listener) {
-  if (default_xml_generator_ != listener) {
-    // It is an error to pass this method a listener that is already in the
-    // list.
-    delete Release(default_xml_generator_);
-    default_xml_generator_ = listener;
-    if (listener != nullptr) Append(listener);
-  }
-}
-
-// Controls whether events will be forwarded by the repeater to the
-// listeners in the list.
-bool TestEventListeners::EventForwardingEnabled() const {
-  return repeater_->forwarding_enabled();
-}
-
-void TestEventListeners::SuppressEventForwarding() {
-  repeater_->set_forwarding_enabled(false);
-}
-
-// class UnitTest
-
-// Gets the singleton UnitTest object.  The first time this method is
-// called, a UnitTest object is constructed and returned.  Consecutive
-// calls will return the same object.
-//
-// We don't protect this under mutex_ as a user is not supposed to
-// call this before main() starts, from which point on the return
-// value will never change.
-UnitTest* UnitTest::GetInstance() {
-  // CodeGear C++Builder insists on a public destructor for the
-  // default implementation.  Use this implementation to keep good OO
-  // design with private destructor.
-
-#if defined(__BORLANDC__)
-  static UnitTest* const instance = new UnitTest;
-  return instance;
-#else
-  static UnitTest instance;
-  return &instance;
-#endif  // defined(__BORLANDC__)
-}
-
-// Gets the number of successful test suites.
-int UnitTest::successful_test_suite_count() const {
-  return impl()->successful_test_suite_count();
-}
-
-// Gets the number of failed test suites.
-int UnitTest::failed_test_suite_count() const {
-  return impl()->failed_test_suite_count();
-}
-
-// Gets the number of all test suites.
-int UnitTest::total_test_suite_count() const {
-  return impl()->total_test_suite_count();
-}
-
-// Gets the number of all test suites that contain at least one test
-// that should run.
-int UnitTest::test_suite_to_run_count() const {
-  return impl()->test_suite_to_run_count();
-}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-int UnitTest::successful_test_case_count() const {
-  return impl()->successful_test_suite_count();
-}
-int UnitTest::failed_test_case_count() const {
-  return impl()->failed_test_suite_count();
-}
-int UnitTest::total_test_case_count() const {
-  return impl()->total_test_suite_count();
-}
-int UnitTest::test_case_to_run_count() const {
-  return impl()->test_suite_to_run_count();
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Gets the number of successful tests.
-int UnitTest::successful_test_count() const {
-  return impl()->successful_test_count();
-}
-
-// Gets the number of skipped tests.
-int UnitTest::skipped_test_count() const {
-  return impl()->skipped_test_count();
-}
-
-// Gets the number of failed tests.
-int UnitTest::failed_test_count() const { return impl()->failed_test_count(); }
-
-// Gets the number of disabled tests that will be reported in the XML report.
-int UnitTest::reportable_disabled_test_count() const {
-  return impl()->reportable_disabled_test_count();
-}
-
-// Gets the number of disabled tests.
-int UnitTest::disabled_test_count() const {
-  return impl()->disabled_test_count();
-}
-
-// Gets the number of tests to be printed in the XML report.
-int UnitTest::reportable_test_count() const {
-  return impl()->reportable_test_count();
-}
-
-// Gets the number of all tests.
-int UnitTest::total_test_count() const { return impl()->total_test_count(); }
-
-// Gets the number of tests that should run.
-int UnitTest::test_to_run_count() const { return impl()->test_to_run_count(); }
-
-// Gets the time of the test program start, in ms from the start of the
-// UNIX epoch.
-internal::TimeInMillis UnitTest::start_timestamp() const {
-    return impl()->start_timestamp();
-}
-
-// Gets the elapsed time, in milliseconds.
-internal::TimeInMillis UnitTest::elapsed_time() const {
-  return impl()->elapsed_time();
-}
-
-// Returns true if and only if the unit test passed (i.e. all test suites
-// passed).
-bool UnitTest::Passed() const { return impl()->Passed(); }
-
-// Returns true if and only if the unit test failed (i.e. some test suite
-// failed or something outside of all tests failed).
-bool UnitTest::Failed() const { return impl()->Failed(); }
-
-// Gets the i-th test suite among all the test suites. i can range from 0 to
-// total_test_suite_count() - 1. If i is not in that range, returns NULL.
-const TestSuite* UnitTest::GetTestSuite(int i) const {
-  return impl()->GetTestSuite(i);
-}
-
-//  Legacy API is deprecated but still available
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-const TestCase* UnitTest::GetTestCase(int i) const {
-  return impl()->GetTestCase(i);
-}
-#endif  //  GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-// Returns the TestResult containing information on test failures and
-// properties logged outside of individual test suites.
-const TestResult& UnitTest::ad_hoc_test_result() const {
-  return *impl()->ad_hoc_test_result();
-}
-
-// Gets the i-th test suite among all the test suites. i can range from 0 to
-// total_test_suite_count() - 1. If i is not in that range, returns NULL.
-TestSuite* UnitTest::GetMutableTestSuite(int i) {
-  return impl()->GetMutableSuiteCase(i);
-}
-
-// Returns the list of event listeners that can be used to track events
-// inside Google Test.
-TestEventListeners& UnitTest::listeners() {
-  return *impl()->listeners();
-}
-
-// Registers and returns a global test environment.  When a test
-// program is run, all global test environments will be set-up in the
-// order they were registered.  After all tests in the program have
-// finished, all global test environments will be torn-down in the
-// *reverse* order they were registered.
-//
-// The UnitTest object takes ownership of the given environment.
-//
-// We don't protect this under mutex_, as we only support calling it
-// from the main thread.
-Environment* UnitTest::AddEnvironment(Environment* env) {
-  if (env == nullptr) {
-    return nullptr;
-  }
-
-  impl_->environments().push_back(env);
-  return env;
-}
-
-// Adds a TestPartResult to the current TestResult object.  All Google Test
-// assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc) eventually call
-// this to report their results.  The user code should use the
-// assertion macros instead of calling this directly.
-void UnitTest::AddTestPartResult(
-    TestPartResult::Type result_type,
-    const char* file_name,
-    int line_number,
-    const std::string& message,
-    const std::string& os_stack_trace) GTEST_LOCK_EXCLUDED_(mutex_) {
-  Message msg;
-  msg << message;
-
-  internal::MutexLock lock(&mutex_);
-  if (impl_->gtest_trace_stack().size() > 0) {
-    msg << "\n" << GTEST_NAME_ << " trace:";
-
-    for (size_t i = impl_->gtest_trace_stack().size(); i > 0; --i) {
-      const internal::TraceInfo& trace = impl_->gtest_trace_stack()[i - 1];
-      msg << "\n" << internal::FormatFileLocation(trace.file, trace.line)
-          << " " << trace.message;
-    }
-  }
-
-  if (os_stack_trace.c_str() != nullptr && !os_stack_trace.empty()) {
-    msg << internal::kStackTraceMarker << os_stack_trace;
-  }
-
-  const TestPartResult result = TestPartResult(
-      result_type, file_name, line_number, msg.GetString().c_str());
-  impl_->GetTestPartResultReporterForCurrentThread()->
-      ReportTestPartResult(result);
-
-  if (result_type != TestPartResult::kSuccess &&
-      result_type != TestPartResult::kSkip) {
-    // gtest_break_on_failure takes precedence over
-    // gtest_throw_on_failure.  This allows a user to set the latter
-    // in the code (perhaps in order to use Google Test assertions
-    // with another testing framework) and specify the former on the
-    // command line for debugging.
-    if (GTEST_FLAG(break_on_failure)) {
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-      // Using DebugBreak on Windows allows gtest to still break into a debugger
-      // when a failure happens and both the --gtest_break_on_failure and
-      // the --gtest_catch_exceptions flags are specified.
-      DebugBreak();
-#elif (!defined(__native_client__)) &&            \
-    ((defined(__clang__) || defined(__GNUC__)) && \
-     (defined(__x86_64__) || defined(__i386__)))
-      // with clang/gcc we can achieve the same effect on x86 by invoking int3
-      asm("int3");
-#else
-      // Dereference nullptr through a volatile pointer to prevent the compiler
-      // from removing. We use this rather than abort() or __builtin_trap() for
-      // portability: some debuggers don't correctly trap abort().
-      *static_cast<volatile int*>(nullptr) = 1;
-#endif  // GTEST_OS_WINDOWS
-    } else if (GTEST_FLAG(throw_on_failure)) {
-#if GTEST_HAS_EXCEPTIONS
-      throw internal::GoogleTestFailureException(result);
-#else
-      // We cannot call abort() as it generates a pop-up in debug mode
-      // that cannot be suppressed in VC 7.1 or below.
-      exit(1);
-#endif
-    }
-  }
-}
-
-// Adds a TestProperty to the current TestResult object when invoked from
-// inside a test, to current TestSuite's ad_hoc_test_result_ when invoked
-// from SetUpTestSuite or TearDownTestSuite, or to the global property set
-// when invoked elsewhere.  If the result already contains a property with
-// the same key, the value will be updated.
-void UnitTest::RecordProperty(const std::string& key,
-                              const std::string& value) {
-  impl_->RecordProperty(TestProperty(key, value));
-}
-
-// Runs all tests in this UnitTest object and prints the result.
-// Returns 0 if successful, or 1 otherwise.
-//
-// We don't protect this under mutex_, as we only support calling it
-// from the main thread.
-int UnitTest::Run() {
-  const bool in_death_test_child_process =
-      internal::GTEST_FLAG(internal_run_death_test).length() > 0;
-
-  // Google Test implements this protocol for catching that a test
-  // program exits before returning control to Google Test:
-  //
-  //   1. Upon start, Google Test creates a file whose absolute path
-  //      is specified by the environment variable
-  //      TEST_PREMATURE_EXIT_FILE.
-  //   2. When Google Test has finished its work, it deletes the file.
-  //
-  // This allows a test runner to set TEST_PREMATURE_EXIT_FILE before
-  // running a Google-Test-based test program and check the existence
-  // of the file at the end of the test execution to see if it has
-  // exited prematurely.
-
-  // If we are in the child process of a death test, don't
-  // create/delete the premature exit file, as doing so is unnecessary
-  // and will confuse the parent process.  Otherwise, create/delete
-  // the file upon entering/leaving this function.  If the program
-  // somehow exits before this function has a chance to return, the
-  // premature-exit file will be left undeleted, causing a test runner
-  // that understands the premature-exit-file protocol to report the
-  // test as having failed.
-  const internal::ScopedPrematureExitFile premature_exit_file(
-      in_death_test_child_process
-          ? nullptr
-          : internal::posix::GetEnv("TEST_PREMATURE_EXIT_FILE"));
-
-  // Captures the value of GTEST_FLAG(catch_exceptions).  This value will be
-  // used for the duration of the program.
-  impl()->set_catch_exceptions(GTEST_FLAG(catch_exceptions));
-
-#if GTEST_OS_WINDOWS
-  // Either the user wants Google Test to catch exceptions thrown by the
-  // tests or this is executing in the context of death test child
-  // process. In either case the user does not want to see pop-up dialogs
-  // about crashes - they are expected.
-  if (impl()->catch_exceptions() || in_death_test_child_process) {
-# if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
-    // SetErrorMode doesn't exist on CE.
-    SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOALIGNMENTFAULTEXCEPT |
-                 SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX);
-# endif  // !GTEST_OS_WINDOWS_MOBILE
-
-# if (defined(_MSC_VER) || GTEST_OS_WINDOWS_MINGW) && !GTEST_OS_WINDOWS_MOBILE
-    // Death test children can be terminated with _abort().  On Windows,
-    // _abort() can show a dialog with a warning message.  This forces the
-    // abort message to go to stderr instead.
-    _set_error_mode(_OUT_TO_STDERR);
-# endif
-
-# if defined(_MSC_VER) && !GTEST_OS_WINDOWS_MOBILE
-    // In the debug version, Visual Studio pops up a separate dialog
-    // offering a choice to debug the aborted program. We need to suppress
-    // this dialog or it will pop up for every EXPECT/ASSERT_DEATH statement
-    // executed. Google Test will notify the user of any unexpected
-    // failure via stderr.
-    if (!GTEST_FLAG(break_on_failure))
-      _set_abort_behavior(
-          0x0,                                    // Clear the following flags:
-          _WRITE_ABORT_MSG | _CALL_REPORTFAULT);  // pop-up window, core dump.
-# endif
-
-    // In debug mode, the Windows CRT can crash with an assertion over invalid
-    // input (e.g. passing an invalid file descriptor).  The default handling
-    // for these assertions is to pop up a dialog and wait for user input.
-    // Instead ask the CRT to dump such assertions to stderr non-interactively.
-    if (!IsDebuggerPresent()) {
-      (void)_CrtSetReportMode(_CRT_ASSERT,
-                              _CRTDBG_MODE_FILE | _CRTDBG_MODE_DEBUG);
-      (void)_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
-    }
-  }
-#endif  // GTEST_OS_WINDOWS
-
-  return internal::HandleExceptionsInMethodIfSupported(
-      impl(),
-      &internal::UnitTestImpl::RunAllTests,
-      "auxiliary test code (environments or event listeners)") ? 0 : 1;
-}
-
-// Returns the working directory when the first TEST() or TEST_F() was
-// executed.
-const char* UnitTest::original_working_dir() const {
-  return impl_->original_working_dir_.c_str();
-}
-
-// Returns the TestSuite object for the test that's currently running,
-// or NULL if no test is running.
-const TestSuite* UnitTest::current_test_suite() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_suite();
-}
-
-// Legacy API is still available but deprecated
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-const TestCase* UnitTest::current_test_case() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_suite();
-}
-#endif
-
-// Returns the TestInfo object for the test that's currently running,
-// or NULL if no test is running.
-const TestInfo* UnitTest::current_test_info() const
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  return impl_->current_test_info();
-}
-
-// Returns the random seed used at the start of the current test run.
-int UnitTest::random_seed() const { return impl_->random_seed(); }
-
-// Returns ParameterizedTestSuiteRegistry object used to keep track of
-// value-parameterized tests and instantiate and register them.
-internal::ParameterizedTestSuiteRegistry&
-UnitTest::parameterized_test_registry() GTEST_LOCK_EXCLUDED_(mutex_) {
-  return impl_->parameterized_test_registry();
-}
-
-// Creates an empty UnitTest.
-UnitTest::UnitTest() {
-  impl_ = new internal::UnitTestImpl(this);
-}
-
-// Destructor of UnitTest.
-UnitTest::~UnitTest() {
-  delete impl_;
-}
-
-// Pushes a trace defined by SCOPED_TRACE() on to the per-thread
-// Google Test trace stack.
-void UnitTest::PushGTestTrace(const internal::TraceInfo& trace)
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  impl_->gtest_trace_stack().push_back(trace);
-}
-
-// Pops a trace from the per-thread Google Test trace stack.
-void UnitTest::PopGTestTrace()
-    GTEST_LOCK_EXCLUDED_(mutex_) {
-  internal::MutexLock lock(&mutex_);
-  impl_->gtest_trace_stack().pop_back();
-}
-
-namespace internal {
-
-UnitTestImpl::UnitTestImpl(UnitTest* parent)
-    : parent_(parent),
-      GTEST_DISABLE_MSC_WARNINGS_PUSH_(4355 /* using this in initializer */)
-          default_global_test_part_result_reporter_(this),
-      default_per_thread_test_part_result_reporter_(this),
-      GTEST_DISABLE_MSC_WARNINGS_POP_() global_test_part_result_repoter_(
-          &default_global_test_part_result_reporter_),
-      per_thread_test_part_result_reporter_(
-          &default_per_thread_test_part_result_reporter_),
-      parameterized_test_registry_(),
-      parameterized_tests_registered_(false),
-      last_death_test_suite_(-1),
-      current_test_suite_(nullptr),
-      current_test_info_(nullptr),
-      ad_hoc_test_result_(),
-      os_stack_trace_getter_(nullptr),
-      post_flag_parse_init_performed_(false),
-      random_seed_(0),  // Will be overridden by the flag before first use.
-      random_(0),       // Will be reseeded before first use.
-      start_timestamp_(0),
-      elapsed_time_(0),
-#if GTEST_HAS_DEATH_TEST
-      death_test_factory_(new DefaultDeathTestFactory),
-#endif
-      // Will be overridden by the flag before first use.
-      catch_exceptions_(false) {
-  listeners()->SetDefaultResultPrinter(new PrettyUnitTestResultPrinter);
-}
-
-UnitTestImpl::~UnitTestImpl() {
-  // Deletes every TestSuite.
-  ForEach(test_suites_, internal::Delete<TestSuite>);
-
-  // Deletes every Environment.
-  ForEach(environments_, internal::Delete<Environment>);
-
-  delete os_stack_trace_getter_;
-}
-
-// Adds a TestProperty to the current TestResult object when invoked in a
-// context of a test, to current test suite's ad_hoc_test_result when invoke
-// from SetUpTestSuite/TearDownTestSuite, or to the global property set
-// otherwise.  If the result already contains a property with the same key,
-// the value will be updated.
-void UnitTestImpl::RecordProperty(const TestProperty& test_property) {
-  std::string xml_element;
-  TestResult* test_result;  // TestResult appropriate for property recording.
-
-  if (current_test_info_ != nullptr) {
-    xml_element = "testcase";
-    test_result = &(current_test_info_->result_);
-  } else if (current_test_suite_ != nullptr) {
-    xml_element = "testsuite";
-    test_result = &(current_test_suite_->ad_hoc_test_result_);
-  } else {
-    xml_element = "testsuites";
-    test_result = &ad_hoc_test_result_;
-  }
-  test_result->RecordProperty(xml_element, test_property);
-}
-
-#if GTEST_HAS_DEATH_TEST
-// Disables event forwarding if the control is currently in a death test
-// subprocess. Must not be called before InitGoogleTest.
-void UnitTestImpl::SuppressTestEventsIfInSubprocess() {
-  if (internal_run_death_test_flag_.get() != nullptr)
-    listeners()->SuppressEventForwarding();
-}
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Initializes event listeners performing XML output as specified by
-// UnitTestOptions. Must not be called before InitGoogleTest.
-void UnitTestImpl::ConfigureXmlOutput() {
-  const std::string& output_format = UnitTestOptions::GetOutputFormat();
-  if (output_format == "xml") {
-    listeners()->SetDefaultXmlGenerator(new XmlUnitTestResultPrinter(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
-  } else if (output_format == "json") {
-    listeners()->SetDefaultXmlGenerator(new JsonUnitTestResultPrinter(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str()));
-  } else if (output_format != "") {
-    GTEST_LOG_(WARNING) << "WARNING: unrecognized output format \""
-                        << output_format << "\" ignored.";
-  }
-}
-
-#if GTEST_CAN_STREAM_RESULTS_
-// Initializes event listeners for streaming test results in string form.
-// Must not be called before InitGoogleTest.
-void UnitTestImpl::ConfigureStreamingOutput() {
-  const std::string& target = GTEST_FLAG(stream_result_to);
-  if (!target.empty()) {
-    const size_t pos = target.find(':');
-    if (pos != std::string::npos) {
-      listeners()->Append(new StreamingListener(target.substr(0, pos),
-                                                target.substr(pos+1)));
-    } else {
-      GTEST_LOG_(WARNING) << "unrecognized streaming target \"" << target
-                          << "\" ignored.";
-    }
-  }
-}
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-// Performs initialization dependent upon flag values obtained in
-// ParseGoogleTestFlagsOnly.  Is called from InitGoogleTest after the call to
-// ParseGoogleTestFlagsOnly.  In case a user neglects to call InitGoogleTest
-// this function is also called from RunAllTests.  Since this function can be
-// called more than once, it has to be idempotent.
-void UnitTestImpl::PostFlagParsingInit() {
-  // Ensures that this function does not execute more than once.
-  if (!post_flag_parse_init_performed_) {
-    post_flag_parse_init_performed_ = true;
-
-#if defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
-    // Register to send notifications about key process state changes.
-    listeners()->Append(new GTEST_CUSTOM_TEST_EVENT_LISTENER_());
-#endif  // defined(GTEST_CUSTOM_TEST_EVENT_LISTENER_)
-
-#if GTEST_HAS_DEATH_TEST
-    InitDeathTestSubprocessControlInfo();
-    SuppressTestEventsIfInSubprocess();
-#endif  // GTEST_HAS_DEATH_TEST
-
-    // Registers parameterized tests. This makes parameterized tests
-    // available to the UnitTest reflection API without running
-    // RUN_ALL_TESTS.
-    RegisterParameterizedTests();
-
-    // Configures listeners for XML output. This makes it possible for users
-    // to shut down the default XML output before invoking RUN_ALL_TESTS.
-    ConfigureXmlOutput();
-
-#if GTEST_CAN_STREAM_RESULTS_
-    // Configures listeners for streaming test results to the specified server.
-    ConfigureStreamingOutput();
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-#if GTEST_HAS_ABSL
-    if (GTEST_FLAG(install_failure_signal_handler)) {
-      absl::FailureSignalHandlerOptions options;
-      absl::InstallFailureSignalHandler(options);
-    }
-#endif  // GTEST_HAS_ABSL
-  }
-}
-
-// A predicate that checks the name of a TestSuite against a known
-// value.
-//
-// This is used for implementation of the UnitTest class only.  We put
-// it in the anonymous namespace to prevent polluting the outer
-// namespace.
-//
-// TestSuiteNameIs is copyable.
-class TestSuiteNameIs {
- public:
-  // Constructor.
-  explicit TestSuiteNameIs(const std::string& name) : name_(name) {}
-
-  // Returns true if and only if the name of test_suite matches name_.
-  bool operator()(const TestSuite* test_suite) const {
-    return test_suite != nullptr &&
-           strcmp(test_suite->name(), name_.c_str()) == 0;
-  }
-
- private:
-  std::string name_;
-};
-
-// Finds and returns a TestSuite with the given name.  If one doesn't
-// exist, creates one and returns it.  It's the CALLER'S
-// RESPONSIBILITY to ensure that this function is only called WHEN THE
-// TESTS ARE NOT SHUFFLED.
-//
-// Arguments:
-//
-//   test_suite_name: name of the test suite
-//   type_param:     the name of the test suite's type parameter, or NULL if
-//                   this is not a typed or a type-parameterized test suite.
-//   set_up_tc:      pointer to the function that sets up the test suite
-//   tear_down_tc:   pointer to the function that tears down the test suite
-TestSuite* UnitTestImpl::GetTestSuite(
-    const char* test_suite_name, const char* type_param,
-    internal::SetUpTestSuiteFunc set_up_tc,
-    internal::TearDownTestSuiteFunc tear_down_tc) {
-  // Can we find a TestSuite with the given name?
-  const auto test_suite =
-      std::find_if(test_suites_.rbegin(), test_suites_.rend(),
-                   TestSuiteNameIs(test_suite_name));
-
-  if (test_suite != test_suites_.rend()) return *test_suite;
-
-  // No.  Let's create one.
-  auto* const new_test_suite =
-      new TestSuite(test_suite_name, type_param, set_up_tc, tear_down_tc);
-
-  // Is this a death test suite?
-  if (internal::UnitTestOptions::MatchesFilter(test_suite_name,
-                                               kDeathTestSuiteFilter)) {
-    // Yes.  Inserts the test suite after the last death test suite
-    // defined so far.  This only works when the test suites haven't
-    // been shuffled.  Otherwise we may end up running a death test
-    // after a non-death test.
-    ++last_death_test_suite_;
-    test_suites_.insert(test_suites_.begin() + last_death_test_suite_,
-                        new_test_suite);
-  } else {
-    // No.  Appends to the end of the list.
-    test_suites_.push_back(new_test_suite);
-  }
-
-  test_suite_indices_.push_back(static_cast<int>(test_suite_indices_.size()));
-  return new_test_suite;
-}
-
-// Helpers for setting up / tearing down the given environment.  They
-// are for use in the ForEach() function.
-static void SetUpEnvironment(Environment* env) { env->SetUp(); }
-static void TearDownEnvironment(Environment* env) { env->TearDown(); }
-
-// Runs all tests in this UnitTest object, prints the result, and
-// returns true if all tests are successful.  If any exception is
-// thrown during a test, the test is considered to be failed, but the
-// rest of the tests will still be run.
-//
-// When parameterized tests are enabled, it expands and registers
-// parameterized tests first in RegisterParameterizedTests().
-// All other functions called from RunAllTests() may safely assume that
-// parameterized tests are ready to be counted and run.
-bool UnitTestImpl::RunAllTests() {
-  // True if and only if Google Test is initialized before RUN_ALL_TESTS() is
-  // called.
-  const bool gtest_is_initialized_before_run_all_tests = GTestIsInitialized();
-
-  // Do not run any test if the --help flag was specified.
-  if (g_help_flag)
-    return true;
-
-  // Repeats the call to the post-flag parsing initialization in case the
-  // user didn't call InitGoogleTest.
-  PostFlagParsingInit();
-
-  // Even if sharding is not on, test runners may want to use the
-  // GTEST_SHARD_STATUS_FILE to query whether the test supports the sharding
-  // protocol.
-  internal::WriteToShardStatusFileIfNeeded();
-
-  // True if and only if we are in a subprocess for running a thread-safe-style
-  // death test.
-  bool in_subprocess_for_death_test = false;
-
-#if GTEST_HAS_DEATH_TEST
-  in_subprocess_for_death_test =
-      (internal_run_death_test_flag_.get() != nullptr);
-# if defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
-  if (in_subprocess_for_death_test) {
-    GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_();
-  }
-# endif  // defined(GTEST_EXTRA_DEATH_TEST_CHILD_SETUP_)
-#endif  // GTEST_HAS_DEATH_TEST
-
-  const bool should_shard = ShouldShard(kTestTotalShards, kTestShardIndex,
-                                        in_subprocess_for_death_test);
-
-  // Compares the full test names with the filter to decide which
-  // tests to run.
-  const bool has_tests_to_run = FilterTests(should_shard
-                                              ? HONOR_SHARDING_PROTOCOL
-                                              : IGNORE_SHARDING_PROTOCOL) > 0;
-
-  // Lists the tests and exits if the --gtest_list_tests flag was specified.
-  if (GTEST_FLAG(list_tests)) {
-    // This must be called *after* FilterTests() has been called.
-    ListTestsMatchingFilter();
-    return true;
-  }
-
-  random_seed_ = GTEST_FLAG(shuffle) ?
-      GetRandomSeedFromFlag(GTEST_FLAG(random_seed)) : 0;
-
-  // True if and only if at least one test has failed.
-  bool failed = false;
-
-  TestEventListener* repeater = listeners()->repeater();
-
-  start_timestamp_ = GetTimeInMillis();
-  repeater->OnTestProgramStart(*parent_);
-
-  // How many times to repeat the tests?  We don't want to repeat them
-  // when we are inside the subprocess of a death test.
-  const int repeat = in_subprocess_for_death_test ? 1 : GTEST_FLAG(repeat);
-  // Repeats forever if the repeat count is negative.
-  const bool gtest_repeat_forever = repeat < 0;
-  for (int i = 0; gtest_repeat_forever || i != repeat; i++) {
-    // We want to preserve failures generated by ad-hoc test
-    // assertions executed before RUN_ALL_TESTS().
-    ClearNonAdHocTestResult();
-
-    const TimeInMillis start = GetTimeInMillis();
-
-    // Shuffles test suites and tests if requested.
-    if (has_tests_to_run && GTEST_FLAG(shuffle)) {
-      random()->Reseed(static_cast<UInt32>(random_seed_));
-      // This should be done before calling OnTestIterationStart(),
-      // such that a test event listener can see the actual test order
-      // in the event.
-      ShuffleTests();
-    }
-
-    // Tells the unit test event listeners that the tests are about to start.
-    repeater->OnTestIterationStart(*parent_, i);
-
-    // Runs each test suite if there is at least one test to run.
-    if (has_tests_to_run) {
-      // Sets up all environments beforehand.
-      repeater->OnEnvironmentsSetUpStart(*parent_);
-      ForEach(environments_, SetUpEnvironment);
-      repeater->OnEnvironmentsSetUpEnd(*parent_);
-
-      // Runs the tests only if there was no fatal failure or skip triggered
-      // during global set-up.
-      if (Test::IsSkipped()) {
-        // Emit diagnostics when global set-up calls skip, as it will not be
-        // emitted by default.
-        TestResult& test_result =
-            *internal::GetUnitTestImpl()->current_test_result();
-        for (int j = 0; j < test_result.total_part_count(); ++j) {
-          const TestPartResult& test_part_result =
-              test_result.GetTestPartResult(j);
-          if (test_part_result.type() == TestPartResult::kSkip) {
-            const std::string& result = test_part_result.message();
-            printf("%s\n", result.c_str());
-          }
-        }
-        fflush(stdout);
-      } else if (!Test::HasFatalFailure()) {
-        for (int test_index = 0; test_index < total_test_suite_count();
-             test_index++) {
-          GetMutableSuiteCase(test_index)->Run();
-        }
-      }
-
-      // Tears down all environments in reverse order afterwards.
-      repeater->OnEnvironmentsTearDownStart(*parent_);
-      std::for_each(environments_.rbegin(), environments_.rend(),
-                    TearDownEnvironment);
-      repeater->OnEnvironmentsTearDownEnd(*parent_);
-    }
-
-    elapsed_time_ = GetTimeInMillis() - start;
-
-    // Tells the unit test event listener that the tests have just finished.
-    repeater->OnTestIterationEnd(*parent_, i);
-
-    // Gets the result and clears it.
-    if (!Passed()) {
-      failed = true;
-    }
-
-    // Restores the original test order after the iteration.  This
-    // allows the user to quickly repro a failure that happens in the
-    // N-th iteration without repeating the first (N - 1) iterations.
-    // This is not enclosed in "if (GTEST_FLAG(shuffle)) { ... }", in
-    // case the user somehow changes the value of the flag somewhere
-    // (it's always safe to unshuffle the tests).
-    UnshuffleTests();
-
-    if (GTEST_FLAG(shuffle)) {
-      // Picks a new random seed for each iteration.
-      random_seed_ = GetNextRandomSeed(random_seed_);
-    }
-  }
-
-  repeater->OnTestProgramEnd(*parent_);
-
-  if (!gtest_is_initialized_before_run_all_tests) {
-    ColoredPrintf(
-        COLOR_RED,
-        "\nIMPORTANT NOTICE - DO NOT IGNORE:\n"
-        "This test program did NOT call " GTEST_INIT_GOOGLE_TEST_NAME_
-        "() before calling RUN_ALL_TESTS(). This is INVALID. Soon " GTEST_NAME_
-        " will start to enforce the valid usage. "
-        "Please fix it ASAP, or IT WILL START TO FAIL.\n");  // NOLINT
-#if GTEST_FOR_GOOGLE_
-    ColoredPrintf(COLOR_RED,
-                  "For more details, see http://wiki/Main/ValidGUnitMain.\n");
-#endif  // GTEST_FOR_GOOGLE_
-  }
-
-  return !failed;
-}
-
-// Reads the GTEST_SHARD_STATUS_FILE environment variable, and creates the file
-// if the variable is present. If a file already exists at this location, this
-// function will write over it. If the variable is present, but the file cannot
-// be created, prints an error and exits.
-void WriteToShardStatusFileIfNeeded() {
-  const char* const test_shard_file = posix::GetEnv(kTestShardStatusFile);
-  if (test_shard_file != nullptr) {
-    FILE* const file = posix::FOpen(test_shard_file, "w");
-    if (file == nullptr) {
-      ColoredPrintf(COLOR_RED,
-                    "Could not write to the test shard status file \"%s\" "
-                    "specified by the %s environment variable.\n",
-                    test_shard_file, kTestShardStatusFile);
-      fflush(stdout);
-      exit(EXIT_FAILURE);
-    }
-    fclose(file);
-  }
-}
-
-// Checks whether sharding is enabled by examining the relevant
-// environment variable values. If the variables are present,
-// but inconsistent (i.e., shard_index >= total_shards), prints
-// an error and exits. If in_subprocess_for_death_test, sharding is
-// disabled because it must only be applied to the original test
-// process. Otherwise, we could filter out death tests we intended to execute.
-bool ShouldShard(const char* total_shards_env,
-                 const char* shard_index_env,
-                 bool in_subprocess_for_death_test) {
-  if (in_subprocess_for_death_test) {
-    return false;
-  }
-
-  const Int32 total_shards = Int32FromEnvOrDie(total_shards_env, -1);
-  const Int32 shard_index = Int32FromEnvOrDie(shard_index_env, -1);
-
-  if (total_shards == -1 && shard_index == -1) {
-    return false;
-  } else if (total_shards == -1 && shard_index != -1) {
-    const Message msg = Message()
-      << "Invalid environment variables: you have "
-      << kTestShardIndex << " = " << shard_index
-      << ", but have left " << kTestTotalShards << " unset.\n";
-    ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  } else if (total_shards != -1 && shard_index == -1) {
-    const Message msg = Message()
-      << "Invalid environment variables: you have "
-      << kTestTotalShards << " = " << total_shards
-      << ", but have left " << kTestShardIndex << " unset.\n";
-    ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  } else if (shard_index < 0 || shard_index >= total_shards) {
-    const Message msg = Message()
-      << "Invalid environment variables: we require 0 <= "
-      << kTestShardIndex << " < " << kTestTotalShards
-      << ", but you have " << kTestShardIndex << "=" << shard_index
-      << ", " << kTestTotalShards << "=" << total_shards << ".\n";
-    ColoredPrintf(COLOR_RED, "%s", msg.GetString().c_str());
-    fflush(stdout);
-    exit(EXIT_FAILURE);
-  }
-
-  return total_shards > 1;
-}
-
-// Parses the environment variable var as an Int32. If it is unset,
-// returns default_val. If it is not an Int32, prints an error
-// and aborts.
-Int32 Int32FromEnvOrDie(const char* var, Int32 default_val) {
-  const char* str_val = posix::GetEnv(var);
-  if (str_val == nullptr) {
-    return default_val;
-  }
-
-  Int32 result;
-  if (!ParseInt32(Message() << "The value of environment variable " << var,
-                  str_val, &result)) {
-    exit(EXIT_FAILURE);
-  }
-  return result;
-}
-
-// Given the total number of shards, the shard index, and the test id,
-// returns true if and only if the test should be run on this shard. The test id
-// is some arbitrary but unique non-negative integer assigned to each test
-// method. Assumes that 0 <= shard_index < total_shards.
-bool ShouldRunTestOnShard(int total_shards, int shard_index, int test_id) {
-  return (test_id % total_shards) == shard_index;
-}
-
-// Compares the name of each test with the user-specified filter to
-// decide whether the test should be run, then records the result in
-// each TestSuite and TestInfo object.
-// If shard_tests == true, further filters tests based on sharding
-// variables in the environment - see
-// https://github.com/google/googletest/blob/master/googletest/docs/advanced.md
-// . Returns the number of tests that should run.
-int UnitTestImpl::FilterTests(ReactionToSharding shard_tests) {
-  const Int32 total_shards = shard_tests == HONOR_SHARDING_PROTOCOL ?
-      Int32FromEnvOrDie(kTestTotalShards, -1) : -1;
-  const Int32 shard_index = shard_tests == HONOR_SHARDING_PROTOCOL ?
-      Int32FromEnvOrDie(kTestShardIndex, -1) : -1;
-
-  // num_runnable_tests are the number of tests that will
-  // run across all shards (i.e., match filter and are not disabled).
-  // num_selected_tests are the number of tests to be run on
-  // this shard.
-  int num_runnable_tests = 0;
-  int num_selected_tests = 0;
-  for (auto* test_suite : test_suites_) {
-    const std::string& test_suite_name = test_suite->name();
-    test_suite->set_should_run(false);
-
-    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
-      TestInfo* const test_info = test_suite->test_info_list()[j];
-      const std::string test_name(test_info->name());
-      // A test is disabled if test suite name or test name matches
-      // kDisableTestFilter.
-      const bool is_disabled = internal::UnitTestOptions::MatchesFilter(
-                                   test_suite_name, kDisableTestFilter) ||
-                               internal::UnitTestOptions::MatchesFilter(
-                                   test_name, kDisableTestFilter);
-      test_info->is_disabled_ = is_disabled;
-
-      const bool matches_filter = internal::UnitTestOptions::FilterMatchesTest(
-          test_suite_name, test_name);
-      test_info->matches_filter_ = matches_filter;
-
-      const bool is_runnable =
-          (GTEST_FLAG(also_run_disabled_tests) || !is_disabled) &&
-          matches_filter;
-
-      const bool is_in_another_shard =
-          shard_tests != IGNORE_SHARDING_PROTOCOL &&
-          !ShouldRunTestOnShard(total_shards, shard_index, num_runnable_tests);
-      test_info->is_in_another_shard_ = is_in_another_shard;
-      const bool is_selected = is_runnable && !is_in_another_shard;
-
-      num_runnable_tests += is_runnable;
-      num_selected_tests += is_selected;
-
-      test_info->should_run_ = is_selected;
-      test_suite->set_should_run(test_suite->should_run() || is_selected);
-    }
-  }
-  return num_selected_tests;
-}
-
-// Prints the given C-string on a single line by replacing all '\n'
-// characters with string "\\n".  If the output takes more than
-// max_length characters, only prints the first max_length characters
-// and "...".
-static void PrintOnOneLine(const char* str, int max_length) {
-  if (str != nullptr) {
-    for (int i = 0; *str != '\0'; ++str) {
-      if (i >= max_length) {
-        printf("...");
-        break;
-      }
-      if (*str == '\n') {
-        printf("\\n");
-        i += 2;
-      } else {
-        printf("%c", *str);
-        ++i;
-      }
-    }
-  }
-}
-
-// Prints the names of the tests matching the user-specified filter flag.
-void UnitTestImpl::ListTestsMatchingFilter() {
-  // Print at most this many characters for each type/value parameter.
-  const int kMaxParamLength = 250;
-
-  for (auto* test_suite : test_suites_) {
-    bool printed_test_suite_name = false;
-
-    for (size_t j = 0; j < test_suite->test_info_list().size(); j++) {
-      const TestInfo* const test_info = test_suite->test_info_list()[j];
-      if (test_info->matches_filter_) {
-        if (!printed_test_suite_name) {
-          printed_test_suite_name = true;
-          printf("%s.", test_suite->name());
-          if (test_suite->type_param() != nullptr) {
-            printf("  # %s = ", kTypeParamLabel);
-            // We print the type parameter on a single line to make
-            // the output easy to parse by a program.
-            PrintOnOneLine(test_suite->type_param(), kMaxParamLength);
-          }
-          printf("\n");
-        }
-        printf("  %s", test_info->name());
-        if (test_info->value_param() != nullptr) {
-          printf("  # %s = ", kValueParamLabel);
-          // We print the value parameter on a single line to make the
-          // output easy to parse by a program.
-          PrintOnOneLine(test_info->value_param(), kMaxParamLength);
-        }
-        printf("\n");
-      }
-    }
-  }
-  fflush(stdout);
-  const std::string& output_format = UnitTestOptions::GetOutputFormat();
-  if (output_format == "xml" || output_format == "json") {
-    FILE* fileout = OpenFileForWriting(
-        UnitTestOptions::GetAbsolutePathToOutputFile().c_str());
-    std::stringstream stream;
-    if (output_format == "xml") {
-      XmlUnitTestResultPrinter(
-          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
-          .PrintXmlTestsList(&stream, test_suites_);
-    } else if (output_format == "json") {
-      JsonUnitTestResultPrinter(
-          UnitTestOptions::GetAbsolutePathToOutputFile().c_str())
-          .PrintJsonTestList(&stream, test_suites_);
-    }
-    fprintf(fileout, "%s", StringStreamToString(&stream).c_str());
-    fclose(fileout);
-  }
-}
-
-// Sets the OS stack trace getter.
-//
-// Does nothing if the input and the current OS stack trace getter are
-// the same; otherwise, deletes the old getter and makes the input the
-// current getter.
-void UnitTestImpl::set_os_stack_trace_getter(
-    OsStackTraceGetterInterface* getter) {
-  if (os_stack_trace_getter_ != getter) {
-    delete os_stack_trace_getter_;
-    os_stack_trace_getter_ = getter;
-  }
-}
-
-// Returns the current OS stack trace getter if it is not NULL;
-// otherwise, creates an OsStackTraceGetter, makes it the current
-// getter, and returns it.
-OsStackTraceGetterInterface* UnitTestImpl::os_stack_trace_getter() {
-  if (os_stack_trace_getter_ == nullptr) {
-#ifdef GTEST_OS_STACK_TRACE_GETTER_
-    os_stack_trace_getter_ = new GTEST_OS_STACK_TRACE_GETTER_;
-#else
-    os_stack_trace_getter_ = new OsStackTraceGetter;
-#endif  // GTEST_OS_STACK_TRACE_GETTER_
-  }
-
-  return os_stack_trace_getter_;
-}
-
-// Returns the most specific TestResult currently running.
-TestResult* UnitTestImpl::current_test_result() {
-  if (current_test_info_ != nullptr) {
-    return &current_test_info_->result_;
-  }
-  if (current_test_suite_ != nullptr) {
-    return &current_test_suite_->ad_hoc_test_result_;
-  }
-  return &ad_hoc_test_result_;
-}
-
-// Shuffles all test suites, and the tests within each test suite,
-// making sure that death tests are still run first.
-void UnitTestImpl::ShuffleTests() {
-  // Shuffles the death test suites.
-  ShuffleRange(random(), 0, last_death_test_suite_ + 1, &test_suite_indices_);
-
-  // Shuffles the non-death test suites.
-  ShuffleRange(random(), last_death_test_suite_ + 1,
-               static_cast<int>(test_suites_.size()), &test_suite_indices_);
-
-  // Shuffles the tests inside each test suite.
-  for (auto& test_suite : test_suites_) {
-    test_suite->ShuffleTests(random());
-  }
-}
-
-// Restores the test suites and tests to their order before the first shuffle.
-void UnitTestImpl::UnshuffleTests() {
-  for (size_t i = 0; i < test_suites_.size(); i++) {
-    // Unshuffles the tests in each test suite.
-    test_suites_[i]->UnshuffleTests();
-    // Resets the index of each test suite.
-    test_suite_indices_[i] = static_cast<int>(i);
-  }
-}
-
-// Returns the current OS stack trace as an std::string.
-//
-// The maximum number of stack frames to be included is specified by
-// the gtest_stack_trace_depth flag.  The skip_count parameter
-// specifies the number of top frames to be skipped, which doesn't
-// count against the number of frames to be included.
-//
-// For example, if Foo() calls Bar(), which in turn calls
-// GetCurrentOsStackTraceExceptTop(..., 1), Foo() will be included in
-// the trace but Bar() and GetCurrentOsStackTraceExceptTop() won't.
-std::string GetCurrentOsStackTraceExceptTop(UnitTest* /*unit_test*/,
-                                            int skip_count) {
-  // We pass skip_count + 1 to skip this wrapper function in addition
-  // to what the user really wants to skip.
-  return GetUnitTestImpl()->CurrentOsStackTraceExceptTop(skip_count + 1);
-}
-
-// Used by the GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_ macro to
-// suppress unreachable code warnings.
-namespace {
-class ClassUniqueToAlwaysTrue {};
-}
-
-bool IsTrue(bool condition) { return condition; }
-
-bool AlwaysTrue() {
-#if GTEST_HAS_EXCEPTIONS
-  // This condition is always false so AlwaysTrue() never actually throws,
-  // but it makes the compiler think that it may throw.
-  if (IsTrue(false))
-    throw ClassUniqueToAlwaysTrue();
-#endif  // GTEST_HAS_EXCEPTIONS
-  return true;
-}
-
-// If *pstr starts with the given prefix, modifies *pstr to be right
-// past the prefix and returns true; otherwise leaves *pstr unchanged
-// and returns false.  None of pstr, *pstr, and prefix can be NULL.
-bool SkipPrefix(const char* prefix, const char** pstr) {
-  const size_t prefix_len = strlen(prefix);
-  if (strncmp(*pstr, prefix, prefix_len) == 0) {
-    *pstr += prefix_len;
-    return true;
-  }
-  return false;
-}
-
-// Parses a string as a command line flag.  The string should have
-// the format "--flag=value".  When def_optional is true, the "=value"
-// part can be omitted.
-//
-// Returns the value of the flag, or NULL if the parsing failed.
-static const char* ParseFlagValue(const char* str, const char* flag,
-                                  bool def_optional) {
-  // str and flag must not be NULL.
-  if (str == nullptr || flag == nullptr) return nullptr;
-
-  // The flag must start with "--" followed by GTEST_FLAG_PREFIX_.
-  const std::string flag_str = std::string("--") + GTEST_FLAG_PREFIX_ + flag;
-  const size_t flag_len = flag_str.length();
-  if (strncmp(str, flag_str.c_str(), flag_len) != 0) return nullptr;
-
-  // Skips the flag name.
-  const char* flag_end = str + flag_len;
-
-  // When def_optional is true, it's OK to not have a "=value" part.
-  if (def_optional && (flag_end[0] == '\0')) {
-    return flag_end;
-  }
-
-  // If def_optional is true and there are more characters after the
-  // flag name, or if def_optional is false, there must be a '=' after
-  // the flag name.
-  if (flag_end[0] != '=') return nullptr;
-
-  // Returns the string after "=".
-  return flag_end + 1;
-}
-
-// Parses a string for a bool flag, in the form of either
-// "--flag=value" or "--flag".
-//
-// In the former case, the value is taken as true as long as it does
-// not start with '0', 'f', or 'F'.
-//
-// In the latter case, the value is taken as true.
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-static bool ParseBoolFlag(const char* str, const char* flag, bool* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, true);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Converts the string value to a bool.
-  *value = !(*value_str == '0' || *value_str == 'f' || *value_str == 'F');
-  return true;
-}
-
-// Parses a string for an Int32 flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-bool ParseInt32Flag(const char* str, const char* flag, Int32* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  return ParseInt32(Message() << "The value of flag --" << flag,
-                    value_str, value);
-}
-
-// Parses a string for a string flag, in the form of
-// "--flag=value".
-//
-// On success, stores the value of the flag in *value, and returns
-// true.  On failure, returns false without changing *value.
-template <typename String>
-static bool ParseStringFlag(const char* str, const char* flag, String* value) {
-  // Gets the value of the flag as a string.
-  const char* const value_str = ParseFlagValue(str, flag, false);
-
-  // Aborts if the parsing failed.
-  if (value_str == nullptr) return false;
-
-  // Sets *value to the value of the flag.
-  *value = value_str;
-  return true;
-}
-
-// Determines whether a string has a prefix that Google Test uses for its
-// flags, i.e., starts with GTEST_FLAG_PREFIX_ or GTEST_FLAG_PREFIX_DASH_.
-// If Google Test detects that a command line flag has its prefix but is not
-// recognized, it will print its help message. Flags starting with
-// GTEST_INTERNAL_PREFIX_ followed by "internal_" are considered Google Test
-// internal flags and do not trigger the help message.
-static bool HasGoogleTestFlagPrefix(const char* str) {
-  return (SkipPrefix("--", &str) ||
-          SkipPrefix("-", &str) ||
-          SkipPrefix("/", &str)) &&
-         !SkipPrefix(GTEST_FLAG_PREFIX_ "internal_", &str) &&
-         (SkipPrefix(GTEST_FLAG_PREFIX_, &str) ||
-          SkipPrefix(GTEST_FLAG_PREFIX_DASH_, &str));
-}
-
-// Prints a string containing code-encoded text.  The following escape
-// sequences can be used in the string to control the text color:
-//
-//   @@    prints a single '@' character.
-//   @R    changes the color to red.
-//   @G    changes the color to green.
-//   @Y    changes the color to yellow.
-//   @D    changes to the default terminal text color.
-//
-static void PrintColorEncoded(const char* str) {
-  GTestColor color = COLOR_DEFAULT;  // The current color.
-
-  // Conceptually, we split the string into segments divided by escape
-  // sequences.  Then we print one segment at a time.  At the end of
-  // each iteration, the str pointer advances to the beginning of the
-  // next segment.
-  for (;;) {
-    const char* p = strchr(str, '@');
-    if (p == nullptr) {
-      ColoredPrintf(color, "%s", str);
-      return;
-    }
-
-    ColoredPrintf(color, "%s", std::string(str, p).c_str());
-
-    const char ch = p[1];
-    str = p + 2;
-    if (ch == '@') {
-      ColoredPrintf(color, "@");
-    } else if (ch == 'D') {
-      color = COLOR_DEFAULT;
-    } else if (ch == 'R') {
-      color = COLOR_RED;
-    } else if (ch == 'G') {
-      color = COLOR_GREEN;
-    } else if (ch == 'Y') {
-      color = COLOR_YELLOW;
-    } else {
-      --str;
-    }
-  }
-}
-
-static const char kColorEncodedHelpMessage[] =
-"This program contains tests written using " GTEST_NAME_ ". You can use the\n"
-"following command line flags to control its behavior:\n"
-"\n"
-"Test Selection:\n"
-"  @G--" GTEST_FLAG_PREFIX_ "list_tests@D\n"
-"      List the names of all tests instead of running them. The name of\n"
-"      TEST(Foo, Bar) is \"Foo.Bar\".\n"
-"  @G--" GTEST_FLAG_PREFIX_ "filter=@YPOSTIVE_PATTERNS"
-    "[@G-@YNEGATIVE_PATTERNS]@D\n"
-"      Run only the tests whose name matches one of the positive patterns but\n"
-"      none of the negative patterns. '?' matches any single character; '*'\n"
-"      matches any substring; ':' separates two patterns.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "also_run_disabled_tests@D\n"
-"      Run all disabled tests too.\n"
-"\n"
-"Test Execution:\n"
-"  @G--" GTEST_FLAG_PREFIX_ "repeat=@Y[COUNT]@D\n"
-"      Run the tests repeatedly; use a negative count to repeat forever.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "shuffle@D\n"
-"      Randomize tests' orders on every iteration.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "random_seed=@Y[NUMBER]@D\n"
-"      Random number seed to use for shuffling test orders (between 1 and\n"
-"      99999, or 0 to use a seed based on the current time).\n"
-"\n"
-"Test Output:\n"
-"  @G--" GTEST_FLAG_PREFIX_ "color=@Y(@Gyes@Y|@Gno@Y|@Gauto@Y)@D\n"
-"      Enable/disable colored output. The default is @Gauto@D.\n"
-"  -@G-" GTEST_FLAG_PREFIX_ "print_time=0@D\n"
-"      Don't print the elapsed time of each test.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "output=@Y(@Gjson@Y|@Gxml@Y)[@G:@YDIRECTORY_PATH@G"
-    GTEST_PATH_SEP_ "@Y|@G:@YFILE_PATH]@D\n"
-"      Generate a JSON or XML report in the given directory or with the given\n"
-"      file name. @YFILE_PATH@D defaults to @Gtest_detail.xml@D.\n"
-# if GTEST_CAN_STREAM_RESULTS_
-"  @G--" GTEST_FLAG_PREFIX_ "stream_result_to=@YHOST@G:@YPORT@D\n"
-"      Stream test results to the given server.\n"
-# endif  // GTEST_CAN_STREAM_RESULTS_
-"\n"
-"Assertion Behavior:\n"
-# if GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
-"  @G--" GTEST_FLAG_PREFIX_ "death_test_style=@Y(@Gfast@Y|@Gthreadsafe@Y)@D\n"
-"      Set the default death test style.\n"
-# endif  // GTEST_HAS_DEATH_TEST && !GTEST_OS_WINDOWS
-"  @G--" GTEST_FLAG_PREFIX_ "break_on_failure@D\n"
-"      Turn assertion failures into debugger break-points.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "throw_on_failure@D\n"
-"      Turn assertion failures into C++ exceptions for use by an external\n"
-"      test framework.\n"
-"  @G--" GTEST_FLAG_PREFIX_ "catch_exceptions=0@D\n"
-"      Do not report exceptions as test failures. Instead, allow them\n"
-"      to crash the program or throw a pop-up (on Windows).\n"
-"\n"
-"Except for @G--" GTEST_FLAG_PREFIX_ "list_tests@D, you can alternatively set "
-    "the corresponding\n"
-"environment variable of a flag (all letters in upper-case). For example, to\n"
-"disable colored text output, you can either specify @G--" GTEST_FLAG_PREFIX_
-    "color=no@D or set\n"
-"the @G" GTEST_FLAG_PREFIX_UPPER_ "COLOR@D environment variable to @Gno@D.\n"
-"\n"
-"For more information, please read the " GTEST_NAME_ " documentation at\n"
-"@G" GTEST_PROJECT_URL_ "@D. If you find a bug in " GTEST_NAME_ "\n"
-"(not one in your own code or tests), please report it to\n"
-"@G<" GTEST_DEV_EMAIL_ ">@D.\n";
-
-static bool ParseGoogleTestFlag(const char* const arg) {
-  return ParseBoolFlag(arg, kAlsoRunDisabledTestsFlag,
-                       &GTEST_FLAG(also_run_disabled_tests)) ||
-      ParseBoolFlag(arg, kBreakOnFailureFlag,
-                    &GTEST_FLAG(break_on_failure)) ||
-      ParseBoolFlag(arg, kCatchExceptionsFlag,
-                    &GTEST_FLAG(catch_exceptions)) ||
-      ParseStringFlag(arg, kColorFlag, &GTEST_FLAG(color)) ||
-      ParseStringFlag(arg, kDeathTestStyleFlag,
-                      &GTEST_FLAG(death_test_style)) ||
-      ParseBoolFlag(arg, kDeathTestUseFork,
-                    &GTEST_FLAG(death_test_use_fork)) ||
-      ParseStringFlag(arg, kFilterFlag, &GTEST_FLAG(filter)) ||
-      ParseStringFlag(arg, kInternalRunDeathTestFlag,
-                      &GTEST_FLAG(internal_run_death_test)) ||
-      ParseBoolFlag(arg, kListTestsFlag, &GTEST_FLAG(list_tests)) ||
-      ParseStringFlag(arg, kOutputFlag, &GTEST_FLAG(output)) ||
-      ParseBoolFlag(arg, kPrintTimeFlag, &GTEST_FLAG(print_time)) ||
-      ParseBoolFlag(arg, kPrintUTF8Flag, &GTEST_FLAG(print_utf8)) ||
-      ParseInt32Flag(arg, kRandomSeedFlag, &GTEST_FLAG(random_seed)) ||
-      ParseInt32Flag(arg, kRepeatFlag, &GTEST_FLAG(repeat)) ||
-      ParseBoolFlag(arg, kShuffleFlag, &GTEST_FLAG(shuffle)) ||
-      ParseInt32Flag(arg, kStackTraceDepthFlag,
-                     &GTEST_FLAG(stack_trace_depth)) ||
-      ParseStringFlag(arg, kStreamResultToFlag,
-                      &GTEST_FLAG(stream_result_to)) ||
-      ParseBoolFlag(arg, kThrowOnFailureFlag,
-                    &GTEST_FLAG(throw_on_failure));
-}
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-static void LoadFlagsFromFile(const std::string& path) {
-  FILE* flagfile = posix::FOpen(path.c_str(), "r");
-  if (!flagfile) {
-    GTEST_LOG_(FATAL) << "Unable to open file \"" << GTEST_FLAG(flagfile)
-                      << "\"";
-  }
-  std::string contents(ReadEntireFile(flagfile));
-  posix::FClose(flagfile);
-  std::vector<std::string> lines;
-  SplitString(contents, '\n', &lines);
-  for (size_t i = 0; i < lines.size(); ++i) {
-    if (lines[i].empty())
-      continue;
-    if (!ParseGoogleTestFlag(lines[i].c_str()))
-      g_help_flag = true;
-  }
-}
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.  The type parameter CharType can be
-// instantiated to either char or wchar_t.
-template <typename CharType>
-void ParseGoogleTestFlagsOnlyImpl(int* argc, CharType** argv) {
-  for (int i = 1; i < *argc; i++) {
-    const std::string arg_string = StreamableToString(argv[i]);
-    const char* const arg = arg_string.c_str();
-
-    using internal::ParseBoolFlag;
-    using internal::ParseInt32Flag;
-    using internal::ParseStringFlag;
-
-    bool remove_flag = false;
-    if (ParseGoogleTestFlag(arg)) {
-      remove_flag = true;
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-    } else if (ParseStringFlag(arg, kFlagfileFlag, &GTEST_FLAG(flagfile))) {
-      LoadFlagsFromFile(GTEST_FLAG(flagfile));
-      remove_flag = true;
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-    } else if (arg_string == "--help" || arg_string == "-h" ||
-               arg_string == "-?" || arg_string == "/?" ||
-               HasGoogleTestFlagPrefix(arg)) {
-      // Both help flag and unrecognized Google Test flags (excluding
-      // internal ones) trigger help display.
-      g_help_flag = true;
-    }
-
-    if (remove_flag) {
-      // Shift the remainder of the argv list left by one.  Note
-      // that argv has (*argc + 1) elements, the last one always being
-      // NULL.  The following loop moves the trailing NULL element as
-      // well.
-      for (int j = i; j != *argc; j++) {
-        argv[j] = argv[j + 1];
-      }
-
-      // Decrements the argument count.
-      (*argc)--;
-
-      // We also need to decrement the iterator as we just removed
-      // an element.
-      i--;
-    }
-  }
-
-  if (g_help_flag) {
-    // We print the help here instead of in RUN_ALL_TESTS(), as the
-    // latter may not be called at all if the user is using Google
-    // Test with another testing framework.
-    PrintColorEncoded(kColorEncodedHelpMessage);
-  }
-}
-
-// Parses the command line for Google Test flags, without initializing
-// other parts of Google Test.
-void ParseGoogleTestFlagsOnly(int* argc, char** argv) {
-  ParseGoogleTestFlagsOnlyImpl(argc, argv);
-
-  // Fix the value of *_NSGetArgc() on macOS, but if and only if
-  // *_NSGetArgv() == argv
-  // Only applicable to char** version of argv
-#if GTEST_OS_MAC
-#ifndef GTEST_OS_IOS
-  if (*_NSGetArgv() == argv) {
-    *_NSGetArgc() = *argc;
-  }
-#endif
-#endif
-}
-void ParseGoogleTestFlagsOnly(int* argc, wchar_t** argv) {
-  ParseGoogleTestFlagsOnlyImpl(argc, argv);
-}
-
-// The internal implementation of InitGoogleTest().
-//
-// The type parameter CharType can be instantiated to either char or
-// wchar_t.
-template <typename CharType>
-void InitGoogleTestImpl(int* argc, CharType** argv) {
-  // We don't want to run the initialization code twice.
-  if (GTestIsInitialized()) return;
-
-  if (*argc <= 0) return;
-
-  g_argvs.clear();
-  for (int i = 0; i != *argc; i++) {
-    g_argvs.push_back(StreamableToString(argv[i]));
-  }
-
-#if GTEST_HAS_ABSL
-  absl::InitializeSymbolizer(g_argvs[0].c_str());
-#endif  // GTEST_HAS_ABSL
-
-  ParseGoogleTestFlagsOnly(argc, argv);
-  GetUnitTestImpl()->PostFlagParsingInit();
-}
-
-}  // namespace internal
-
-// Initializes Google Test.  This must be called before calling
-// RUN_ALL_TESTS().  In particular, it parses a command line for the
-// flags that Google Test recognizes.  Whenever a Google Test flag is
-// seen, it is removed from argv, and *argc is decremented.
-//
-// No value is returned.  Instead, the Google Test flag variables are
-// updated.
-//
-// Calling the function for the second time has no user-visible effect.
-void InitGoogleTest(int* argc, char** argv) {
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-// This overloaded version can be used in Windows programs compiled in
-// UNICODE mode.
-void InitGoogleTest(int* argc, wchar_t** argv) {
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-// This overloaded version can be used on Arduino/embedded platforms where
-// there is no argc/argv.
-void InitGoogleTest() {
-  // Since Arduino doesn't have a command line, fake out the argc/argv arguments
-  int argc = 1;
-  const auto arg0 = "dummy";
-  char* argv0 = const_cast<char*>(arg0);
-  char** argv = &argv0;
-
-#if defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_(&argc, argv);
-#else  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-  internal::InitGoogleTestImpl(&argc, argv);
-#endif  // defined(GTEST_CUSTOM_INIT_GOOGLE_TEST_FUNCTION_)
-}
-
-std::string TempDir() {
-#if defined(GTEST_CUSTOM_TEMPDIR_FUNCTION_)
-  return GTEST_CUSTOM_TEMPDIR_FUNCTION_();
-#endif
-
-#if GTEST_OS_WINDOWS_MOBILE
-  return "\\temp\\";
-#elif GTEST_OS_WINDOWS
-  const char* temp_dir = internal::posix::GetEnv("TEMP");
-  if (temp_dir == nullptr || temp_dir[0] == '\0')
-    return "\\temp\\";
-  else if (temp_dir[strlen(temp_dir) - 1] == '\\')
-    return temp_dir;
-  else
-    return std::string(temp_dir) + "\\";
-#elif GTEST_OS_LINUX_ANDROID
-  return "/sdcard/";
-#else
-  return "/tmp/";
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-// Class ScopedTrace
-
-// Pushes the given source file location and message onto a per-thread
-// trace stack maintained by Google Test.
-void ScopedTrace::PushTrace(const char* file, int line, std::string message) {
-  internal::TraceInfo trace;
-  trace.file = file;
-  trace.line = line;
-  trace.message.swap(message);
-
-  UnitTest::GetInstance()->PushGTestTrace(trace);
-}
-
-// Pops the info pushed by the c'tor.
-ScopedTrace::~ScopedTrace()
-    GTEST_LOCK_EXCLUDED_(&UnitTest::mutex_) {
-  UnitTest::GetInstance()->PopGTestTrace();
-}
-
-}  // namespace testing
diff --git a/3rdparty/gtest/src/gtest_main.cc b/3rdparty/gtest/src/gtest_main.cc
deleted file mode 100644
index f6e1dd96..00000000
--- a/3rdparty/gtest/src/gtest_main.cc
+++ /dev/null
@@ -1,47 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include <cstdio>
-#include "gtest/gtest.h"
-
-#ifdef ARDUINO
-void setup() {
-  testing::InitGoogleTest();
-}
-
-void loop() { RUN_ALL_TESTS(); }
-
-#else
-
-GTEST_API_ int main(int argc, char **argv) {
-  printf("Running main() from %s\n", __FILE__);
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-#endif
diff --git a/3rdparty/gtest/test/BUILD.bazel b/3rdparty/gtest/test/BUILD.bazel
deleted file mode 100644
index 156d5d4b..00000000
--- a/3rdparty/gtest/test/BUILD.bazel
+++ /dev/null
@@ -1,521 +0,0 @@
-# Copyright 2017 Google Inc.
-# All Rights Reserved.
-#
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-#
-# Author: misterg@google.com (Gennadiy Civil)
-#
-# Bazel BUILD for The Google C++ Testing Framework (Google Test)
-
-load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_test")
-load("@rules_python//python:defs.bzl", "py_library", "py_test")
-
-licenses(["notice"])
-
-#on windows exclude gtest-tuple.h
-cc_test(
-    name = "gtest_all_test",
-    size = "small",
-    srcs = glob(
-        include = [
-            "gtest-*.cc",
-            "googletest-*.cc",
-            "*.h",
-            "googletest/include/gtest/**/*.h",
-        ],
-        exclude = [
-            "gtest-unittest-api_test.cc",
-            "googletest/src/gtest-all.cc",
-            "gtest_all_test.cc",
-            "gtest-death-test_ex_test.cc",
-            "gtest-listener_test.cc",
-            "gtest-unittest-api_test.cc",
-            "googletest-param-test-test.cc",
-            "googletest-catch-exceptions-test_.cc",
-            "googletest-color-test_.cc",
-            "googletest-env-var-test_.cc",
-            "googletest-filter-unittest_.cc",
-            "googletest-break-on-failure-unittest_.cc",
-            "googletest-listener-test.cc",
-            "googletest-output-test_.cc",
-            "googletest-list-tests-unittest_.cc",
-            "googletest-shuffle-test_.cc",
-            "googletest-uninitialized-test_.cc",
-            "googletest-death-test_ex_test.cc",
-            "googletest-param-test-test",
-            "googletest-throw-on-failure-test_.cc",
-            "googletest-param-test-invalid-name1-test_.cc",
-            "googletest-param-test-invalid-name2-test_.cc",
-        ],
-    ) + select({
-        "//:windows": [],
-        "//conditions:default": [],
-    }),
-    copts = select({
-        "//:windows": ["-DGTEST_USE_OWN_TR1_TUPLE=0"],
-        "//conditions:default": ["-DGTEST_USE_OWN_TR1_TUPLE=1"],
-    }),
-    includes = [
-        "googletest",
-        "googletest/include",
-        "googletest/include/internal",
-        "googletest/test",
-    ],
-    linkopts = select({
-        "//:windows": [],
-        "//conditions:default": ["-pthread"],
-    }),
-    deps = ["//:gtest_main"],
-)
-
-# Tests death tests.
-cc_test(
-    name = "googletest-death-test-test",
-    size = "medium",
-    srcs = ["googletest-death-test-test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest_test_macro_stack_footprint_test",
-    size = "small",
-    srcs = ["gtest_test_macro_stack_footprint_test.cc"],
-    deps = ["//:gtest"],
-)
-
-#These googletest tests have their own main()
-cc_test(
-    name = "googletest-listener-test",
-    size = "small",
-    srcs = ["googletest-listener-test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest-unittest-api_test",
-    size = "small",
-    srcs = [
-        "gtest-unittest-api_test.cc",
-    ],
-    deps = [
-        "//:gtest",
-    ],
-)
-
-cc_test(
-    name = "googletest-param-test-test",
-    size = "small",
-    srcs = [
-        "googletest-param-test-test.cc",
-        "googletest-param-test-test.h",
-        "googletest-param-test2-test.cc",
-    ],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_unittest",
-    size = "small",
-    srcs = ["gtest_unittest.cc"],
-    args = ["--heap_check=strict"],
-    shard_count = 2,
-    deps = ["//:gtest_main"],
-)
-
-#  Py tests
-
-py_library(
-    name = "gtest_test_utils",
-    testonly = 1,
-    srcs = ["gtest_test_utils.py"],
-)
-
-cc_binary(
-    name = "gtest_help_test_",
-    testonly = 1,
-    srcs = ["gtest_help_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_help_test",
-    size = "small",
-    srcs = ["gtest_help_test.py"],
-    data = [":gtest_help_test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-output-test_",
-    testonly = 1,
-    srcs = ["googletest-output-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-output-test",
-    size = "small",
-    srcs = ["googletest-output-test.py"],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        "googletest-output-test-golden-lin.txt",
-        ":googletest-output-test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-color-test_",
-    testonly = 1,
-    srcs = ["googletest-color-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-color-test",
-    size = "small",
-    srcs = ["googletest-color-test.py"],
-    data = [":googletest-color-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-env-var-test_",
-    testonly = 1,
-    srcs = ["googletest-env-var-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-env-var-test",
-    size = "medium",
-    srcs = ["googletest-env-var-test.py"],
-    data = [":googletest-env-var-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-filter-unittest_",
-    testonly = 1,
-    srcs = ["googletest-filter-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-filter-unittest",
-    size = "medium",
-    srcs = ["googletest-filter-unittest.py"],
-    data = [":googletest-filter-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-break-on-failure-unittest_",
-    testonly = 1,
-    srcs = ["googletest-break-on-failure-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-break-on-failure-unittest",
-    size = "small",
-    srcs = ["googletest-break-on-failure-unittest.py"],
-    data = [":googletest-break-on-failure-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_test(
-    name = "gtest_assert_by_exception_test",
-    size = "small",
-    srcs = ["gtest_assert_by_exception_test.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-throw-on-failure-test_",
-    testonly = 1,
-    srcs = ["googletest-throw-on-failure-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-throw-on-failure-test",
-    size = "small",
-    srcs = ["googletest-throw-on-failure-test.py"],
-    data = [":googletest-throw-on-failure-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-list-tests-unittest_",
-    testonly = 1,
-    srcs = ["googletest-list-tests-unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_skip_test",
-    size = "small",
-    srcs = ["gtest_skip_test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_test(
-    name = "gtest_skip_in_environment_setup_test",
-    size = "small",
-    srcs = ["gtest_skip_in_environment_setup_test.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_skip_environment_check_output_test",
-    size = "small",
-    srcs = ["gtest_skip_environment_check_output_test.py"],
-    data = [
-        ":gtest_skip_in_environment_setup_test",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-list-tests-unittest",
-    size = "small",
-    srcs = ["googletest-list-tests-unittest.py"],
-    data = [":googletest-list-tests-unittest_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-shuffle-test_",
-    srcs = ["googletest-shuffle-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-shuffle-test",
-    size = "small",
-    srcs = ["googletest-shuffle-test.py"],
-    data = [":googletest-shuffle-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-catch-exceptions-no-ex-test_",
-    testonly = 1,
-    srcs = ["googletest-catch-exceptions-test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_binary(
-    name = "googletest-catch-exceptions-ex-test_",
-    testonly = 1,
-    srcs = ["googletest-catch-exceptions-test_.cc"],
-    copts = ["-fexceptions"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "googletest-catch-exceptions-test",
-    size = "small",
-    srcs = ["googletest-catch-exceptions-test.py"],
-    data = [
-        ":googletest-catch-exceptions-ex-test_",
-        ":googletest-catch-exceptions-no-ex-test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_xml_output_unittest_",
-    testonly = 1,
-    srcs = ["gtest_xml_output_unittest_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_test(
-    name = "gtest_no_test_unittest",
-    size = "small",
-    srcs = ["gtest_no_test_unittest.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "gtest_xml_output_unittest",
-    size = "small",
-    srcs = [
-        "gtest_xml_output_unittest.py",
-        "gtest_xml_test_utils.py",
-    ],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        # We invoke gtest_no_test_unittest to verify the XML output
-        # when the test program contains no test definition.
-        ":gtest_no_test_unittest",
-        ":gtest_xml_output_unittest_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_xml_outfile1_test_",
-    testonly = 1,
-    srcs = ["gtest_xml_outfile1_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-cc_binary(
-    name = "gtest_xml_outfile2_test_",
-    testonly = 1,
-    srcs = ["gtest_xml_outfile2_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-py_test(
-    name = "gtest_xml_outfiles_test",
-    size = "small",
-    srcs = [
-        "gtest_xml_outfiles_test.py",
-        "gtest_xml_test_utils.py",
-    ],
-    data = [
-        ":gtest_xml_outfile1_test_",
-        ":gtest_xml_outfile2_test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "googletest-uninitialized-test_",
-    testonly = 1,
-    srcs = ["googletest-uninitialized-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-uninitialized-test",
-    size = "medium",
-    srcs = ["googletest-uninitialized-test.py"],
-    data = ["googletest-uninitialized-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-cc_binary(
-    name = "gtest_testbridge_test_",
-    testonly = 1,
-    srcs = ["gtest_testbridge_test_.cc"],
-    deps = ["//:gtest_main"],
-)
-
-# Tests that filtering via testbridge works
-py_test(
-    name = "gtest_testbridge_test",
-    size = "small",
-    srcs = ["gtest_testbridge_test.py"],
-    data = [":gtest_testbridge_test_"],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-json-outfiles-test",
-    size = "small",
-    srcs = [
-        "googletest-json-outfiles-test.py",
-        "gtest_json_test_utils.py",
-    ],
-    data = [
-        ":gtest_xml_outfile1_test_",
-        ":gtest_xml_outfile2_test_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-json-output-unittest",
-    size = "medium",
-    srcs = [
-        "googletest-json-output-unittest.py",
-        "gtest_json_test_utils.py",
-    ],
-    args = select({
-        "//:has_absl": [],
-        "//conditions:default": ["--no_stacktrace_support"],
-    }),
-    data = [
-        # We invoke gtest_no_test_unittest to verify the JSON output
-        # when the test program contains no test definition.
-        ":gtest_no_test_unittest",
-        ":gtest_xml_output_unittest_",
-    ],
-    deps = [":gtest_test_utils"],
-)
-
-# Verifies interaction of death tests and exceptions.
-cc_test(
-    name = "googletest-death-test_ex_catch_test",
-    size = "medium",
-    srcs = ["googletest-death-test_ex_test.cc"],
-    copts = ["-fexceptions"],
-    defines = ["GTEST_ENABLE_CATCH_EXCEPTIONS_=1"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-param-test-invalid-name1-test_",
-    testonly = 1,
-    srcs = ["googletest-param-test-invalid-name1-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-cc_binary(
-    name = "googletest-param-test-invalid-name2-test_",
-    testonly = 1,
-    srcs = ["googletest-param-test-invalid-name2-test_.cc"],
-    deps = ["//:gtest"],
-)
-
-py_test(
-    name = "googletest-param-test-invalid-name1-test",
-    size = "small",
-    srcs = ["googletest-param-test-invalid-name1-test.py"],
-    data = [":googletest-param-test-invalid-name1-test_"],
-    deps = [":gtest_test_utils"],
-)
-
-py_test(
-    name = "googletest-param-test-invalid-name2-test",
-    size = "small",
-    srcs = ["googletest-param-test-invalid-name2-test.py"],
-    data = [":googletest-param-test-invalid-name2-test_"],
-    deps = [":gtest_test_utils"],
-)
diff --git a/3rdparty/gtest/test/googletest-break-on-failure-unittest.py b/3rdparty/gtest/test/googletest-break-on-failure-unittest.py
deleted file mode 100644
index a5dfbc69..00000000
--- a/3rdparty/gtest/test/googletest-break-on-failure-unittest.py
+++ /dev/null
@@ -1,208 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test's break-on-failure mode.
-
-A user can ask Google Test to seg-fault when an assertion fails, using
-either the GTEST_BREAK_ON_FAILURE environment variable or the
---gtest_break_on_failure flag.  This script tests such functionality
-by invoking googletest-break-on-failure-unittest_ (a program written with
-Google Test) with different environments and command line flags.
-"""
-
-import os
-import gtest_test_utils
-
-# Constants.
-
-IS_WINDOWS = os.name == 'nt'
-
-# The environment variable for enabling/disabling the break-on-failure mode.
-BREAK_ON_FAILURE_ENV_VAR = 'GTEST_BREAK_ON_FAILURE'
-
-# The command line flag for enabling/disabling the break-on-failure mode.
-BREAK_ON_FAILURE_FLAG = 'gtest_break_on_failure'
-
-# The environment variable for enabling/disabling the throw-on-failure mode.
-THROW_ON_FAILURE_ENV_VAR = 'GTEST_THROW_ON_FAILURE'
-
-# The environment variable for enabling/disabling the catch-exceptions mode.
-CATCH_EXCEPTIONS_ENV_VAR = 'GTEST_CATCH_EXCEPTIONS'
-
-# Path to the googletest-break-on-failure-unittest_ program.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-break-on-failure-unittest_')
-
-
-environ = gtest_test_utils.environ
-SetEnvVar = gtest_test_utils.SetEnvVar
-
-# Tests in this file run a Google-Test-based test program and expect it
-# to terminate prematurely.  Therefore they are incompatible with
-# the premature-exit-file protocol by design.  Unset the
-# premature-exit filepath to prevent Google Test from creating
-# the file.
-SetEnvVar(gtest_test_utils.PREMATURE_EXIT_FILE_ENV_VAR, None)
-
-
-def Run(command):
-  """Runs a command; returns 1 if it was killed by a signal, or 0 otherwise."""
-
-  p = gtest_test_utils.Subprocess(command, env=environ)
-  if p.terminated_by_signal:
-    return 1
-  else:
-    return 0
-
-
-# The tests.
-
-
-class GTestBreakOnFailureUnitTest(gtest_test_utils.TestCase):
-  """Tests using the GTEST_BREAK_ON_FAILURE environment variable or
-  the --gtest_break_on_failure flag to turn assertion failures into
-  segmentation faults.
-  """
-
-  def RunAndVerify(self, env_var_value, flag_value, expect_seg_fault):
-    """Runs googletest-break-on-failure-unittest_ and verifies that it does
-    (or does not) have a seg-fault.
-
-    Args:
-      env_var_value:    value of the GTEST_BREAK_ON_FAILURE environment
-                        variable; None if the variable should be unset.
-      flag_value:       value of the --gtest_break_on_failure flag;
-                        None if the flag should not be present.
-      expect_seg_fault: 1 if the program is expected to generate a seg-fault;
-                        0 otherwise.
-    """
-
-    SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, env_var_value)
-
-    if env_var_value is None:
-      env_var_value_msg = ' is not set'
-    else:
-      env_var_value_msg = '=' + env_var_value
-
-    if flag_value is None:
-      flag = ''
-    elif flag_value == '0':
-      flag = '--%s=0' % BREAK_ON_FAILURE_FLAG
-    else:
-      flag = '--%s' % BREAK_ON_FAILURE_FLAG
-
-    command = [EXE_PATH]
-    if flag:
-      command.append(flag)
-
-    if expect_seg_fault:
-      should_or_not = 'should'
-    else:
-      should_or_not = 'should not'
-
-    has_seg_fault = Run(command)
-
-    SetEnvVar(BREAK_ON_FAILURE_ENV_VAR, None)
-
-    msg = ('when %s%s, an assertion failure in "%s" %s cause a seg-fault.' %
-           (BREAK_ON_FAILURE_ENV_VAR, env_var_value_msg, ' '.join(command),
-            should_or_not))
-    self.assert_(has_seg_fault == expect_seg_fault, msg)
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value=None,
-                      expect_seg_fault=0)
-
-  def testEnvVar(self):
-    """Tests using the GTEST_BREAK_ON_FAILURE environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value=None,
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value=None,
-                      expect_seg_fault=1)
-
-  def testFlag(self):
-    """Tests using the --gtest_break_on_failure flag."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='1',
-                      expect_seg_fault=1)
-
-  def testFlagOverridesEnvVar(self):
-    """Tests that the flag overrides the environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='1',
-                      expect_seg_fault=1)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='0',
-                      expect_seg_fault=0)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='1',
-                      expect_seg_fault=1)
-
-  def testBreakOnFailureOverridesThrowOnFailure(self):
-    """Tests that gtest_break_on_failure overrides gtest_throw_on_failure."""
-
-    SetEnvVar(THROW_ON_FAILURE_ENV_VAR, '1')
-    try:
-      self.RunAndVerify(env_var_value=None,
-                        flag_value='1',
-                        expect_seg_fault=1)
-    finally:
-      SetEnvVar(THROW_ON_FAILURE_ENV_VAR, None)
-
-  if IS_WINDOWS:
-    def testCatchExceptionsDoesNotInterfere(self):
-      """Tests that gtest_catch_exceptions doesn't interfere."""
-
-      SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, '1')
-      try:
-        self.RunAndVerify(env_var_value='1',
-                          flag_value='1',
-                          expect_seg_fault=1)
-      finally:
-        SetEnvVar(CATCH_EXCEPTIONS_ENV_VAR, None)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-break-on-failure-unittest_.cc b/3rdparty/gtest/test/googletest-break-on-failure-unittest_.cc
deleted file mode 100644
index f84957a2..00000000
--- a/3rdparty/gtest/test/googletest-break-on-failure-unittest_.cc
+++ /dev/null
@@ -1,86 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test's break-on-failure mode.
-//
-// A user can ask Google Test to seg-fault when an assertion fails, using
-// either the GTEST_BREAK_ON_FAILURE environment variable or the
-// --gtest_break_on_failure flag.  This file is used for testing such
-// functionality.
-//
-// This program will be invoked from a Python unit test.  It is
-// expected to fail.  Don't run it directly.
-
-#include "gtest/gtest.h"
-
-#if GTEST_OS_WINDOWS
-# include <windows.h>
-# include <stdlib.h>
-#endif
-
-namespace {
-
-// A test that's expected to fail.
-TEST(Foo, Bar) {
-  EXPECT_EQ(2, 3);
-}
-
-#if GTEST_HAS_SEH && !GTEST_OS_WINDOWS_MOBILE
-// On Windows Mobile global exception handlers are not supported.
-LONG WINAPI ExitWithExceptionCode(
-    struct _EXCEPTION_POINTERS* exception_pointers) {
-  exit(exception_pointers->ExceptionRecord->ExceptionCode);
-}
-#endif
-
-}  // namespace
-
-int main(int argc, char **argv) {
-#if GTEST_OS_WINDOWS
-  // Suppresses display of the Windows error dialog upon encountering
-  // a general protection fault (segment violation).
-  SetErrorMode(SEM_NOGPFAULTERRORBOX | SEM_FAILCRITICALERRORS);
-
-# if GTEST_HAS_SEH && !GTEST_OS_WINDOWS_MOBILE
-
-  // The default unhandled exception filter does not always exit
-  // with the exception code as exit code - for example it exits with
-  // 0 for EXCEPTION_ACCESS_VIOLATION and 1 for EXCEPTION_BREAKPOINT
-  // if the application is compiled in debug mode. Thus we use our own
-  // filter which always exits with the exception code for unhandled
-  // exceptions.
-  SetUnhandledExceptionFilter(ExitWithExceptionCode);
-
-# endif
-#endif  // GTEST_OS_WINDOWS
-  testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-catch-exceptions-test.py b/3rdparty/gtest/test/googletest-catch-exceptions-test.py
deleted file mode 100644
index 94a5b33f..00000000
--- a/3rdparty/gtest/test/googletest-catch-exceptions-test.py
+++ /dev/null
@@ -1,236 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2010 Google Inc.  All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests Google Test's exception catching behavior.
-
-This script invokes googletest-catch-exceptions-test_ and
-googletest-catch-exceptions-ex-test_ (programs written with
-Google Test) and verifies their output.
-"""
-
-import gtest_test_utils
-
-# Constants.
-FLAG_PREFIX = '--gtest_'
-LIST_TESTS_FLAG = FLAG_PREFIX + 'list_tests'
-NO_CATCH_EXCEPTIONS_FLAG = FLAG_PREFIX + 'catch_exceptions=0'
-FILTER_FLAG = FLAG_PREFIX + 'filter'
-
-# Path to the googletest-catch-exceptions-ex-test_ binary, compiled with
-# exceptions enabled.
-EX_EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-catch-exceptions-ex-test_')
-
-# Path to the googletest-catch-exceptions-test_ binary, compiled with
-# exceptions disabled.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-catch-exceptions-no-ex-test_')
-
-environ = gtest_test_utils.environ
-SetEnvVar = gtest_test_utils.SetEnvVar
-
-# Tests in this file run a Google-Test-based test program and expect it
-# to terminate prematurely.  Therefore they are incompatible with
-# the premature-exit-file protocol by design.  Unset the
-# premature-exit filepath to prevent Google Test from creating
-# the file.
-SetEnvVar(gtest_test_utils.PREMATURE_EXIT_FILE_ENV_VAR, None)
-
-TEST_LIST = gtest_test_utils.Subprocess(
-    [EXE_PATH, LIST_TESTS_FLAG], env=environ).output
-
-SUPPORTS_SEH_EXCEPTIONS = 'ThrowsSehException' in TEST_LIST
-
-if SUPPORTS_SEH_EXCEPTIONS:
-  BINARY_OUTPUT = gtest_test_utils.Subprocess([EXE_PATH], env=environ).output
-
-EX_BINARY_OUTPUT = gtest_test_utils.Subprocess(
-    [EX_EXE_PATH], env=environ).output
-
-
-# The tests.
-if SUPPORTS_SEH_EXCEPTIONS:
-  # pylint:disable-msg=C6302
-  class CatchSehExceptionsTest(gtest_test_utils.TestCase):
-    """Tests exception-catching behavior."""
-
-
-    def TestSehExceptions(self, test_output):
-      self.assert_('SEH exception with code 0x2a thrown '
-                   'in the test fixture\'s constructor'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown '
-                   'in the test fixture\'s destructor'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in SetUpTestSuite()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in TearDownTestSuite()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in SetUp()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in TearDown()'
-                   in test_output)
-      self.assert_('SEH exception with code 0x2a thrown in the test body'
-                   in test_output)
-
-    def testCatchesSehExceptionsWithCxxExceptionsEnabled(self):
-      self.TestSehExceptions(EX_BINARY_OUTPUT)
-
-    def testCatchesSehExceptionsWithCxxExceptionsDisabled(self):
-      self.TestSehExceptions(BINARY_OUTPUT)
-
-
-class CatchCxxExceptionsTest(gtest_test_utils.TestCase):
-  """Tests C++ exception-catching behavior.
-
-     Tests in this test case verify that:
-     * C++ exceptions are caught and logged as C++ (not SEH) exceptions
-     * Exception thrown affect the remainder of the test work flow in the
-       expected manner.
-  """
-
-  def testCatchesCxxExceptionsInFixtureConstructor(self):
-    self.assertTrue(
-        'C++ exception with description '
-        '"Standard C++ exception" thrown '
-        'in the test fixture\'s constructor' in EX_BINARY_OUTPUT,
-        EX_BINARY_OUTPUT)
-    self.assert_('unexpected' not in EX_BINARY_OUTPUT,
-                 'This failure belongs in this test only if '
-                 '"CxxExceptionInConstructorTest" (no quotes) '
-                 'appears on the same line as words "called unexpectedly"')
-
-  if ('CxxExceptionInDestructorTest.ThrowsExceptionInDestructor' in
-      EX_BINARY_OUTPUT):
-
-    def testCatchesCxxExceptionsInFixtureDestructor(self):
-      self.assertTrue(
-          'C++ exception with description '
-          '"Standard C++ exception" thrown '
-          'in the test fixture\'s destructor' in EX_BINARY_OUTPUT,
-          EX_BINARY_OUTPUT)
-      self.assertTrue(
-          'CxxExceptionInDestructorTest::TearDownTestSuite() '
-          'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInSetUpTestCase(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in SetUpTestSuite()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInConstructorTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest constructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest::SetUp() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTestSuiteTest test body '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInTearDownTestCase(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in TearDownTestSuite()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInSetUp(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in SetUp()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInSetUpTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assert_('unexpected' not in EX_BINARY_OUTPUT,
-                 'This failure belongs in this test only if '
-                 '"CxxExceptionInSetUpTest" (no quotes) '
-                 'appears on the same line as words "called unexpectedly"')
-
-  def testCatchesCxxExceptionsInTearDown(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in TearDown()' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTearDownTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTearDownTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesCxxExceptionsInTestBody(self):
-    self.assertTrue(
-        'C++ exception with description "Standard C++ exception"'
-        ' thrown in the test body' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest::TearDownTestSuite() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest destructor '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-    self.assertTrue(
-        'CxxExceptionInTestBodyTest::TearDown() '
-        'called as expected.' in EX_BINARY_OUTPUT, EX_BINARY_OUTPUT)
-
-  def testCatchesNonStdCxxExceptions(self):
-    self.assertTrue(
-        'Unknown C++ exception thrown in the test body' in EX_BINARY_OUTPUT,
-        EX_BINARY_OUTPUT)
-
-  def testUnhandledCxxExceptionsAbortTheProgram(self):
-    # Filters out SEH exception tests on Windows. Unhandled SEH exceptions
-    # cause tests to show pop-up windows there.
-    FITLER_OUT_SEH_TESTS_FLAG = FILTER_FLAG + '=-*Seh*'
-    # By default, Google Test doesn't catch the exceptions.
-    uncaught_exceptions_ex_binary_output = gtest_test_utils.Subprocess(
-        [EX_EXE_PATH,
-         NO_CATCH_EXCEPTIONS_FLAG,
-         FITLER_OUT_SEH_TESTS_FLAG],
-        env=environ).output
-
-    self.assert_('Unhandled C++ exception terminating the program'
-                 in uncaught_exceptions_ex_binary_output)
-    self.assert_('unexpected' not in uncaught_exceptions_ex_binary_output)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-catch-exceptions-test_.cc b/3rdparty/gtest/test/googletest-catch-exceptions-test_.cc
deleted file mode 100644
index 8c127d40..00000000
--- a/3rdparty/gtest/test/googletest-catch-exceptions-test_.cc
+++ /dev/null
@@ -1,293 +0,0 @@
-// Copyright 2010, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself. Tests in this file throw C++ or SEH
-// exceptions, and the output is verified by
-// googletest-catch-exceptions-test.py.
-
-#include <stdio.h>  // NOLINT
-#include <stdlib.h>  // For exit().
-
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_SEH
-# include <windows.h>
-#endif
-
-#if GTEST_HAS_EXCEPTIONS
-# include <exception>  // For set_terminate().
-# include <stdexcept>
-#endif
-
-using testing::Test;
-
-#if GTEST_HAS_SEH
-
-class SehExceptionInConstructorTest : public Test {
- public:
-  SehExceptionInConstructorTest() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInConstructorTest, ThrowsExceptionInConstructor) {}
-
-class SehExceptionInDestructorTest : public Test {
- public:
-  ~SehExceptionInDestructorTest() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInDestructorTest, ThrowsExceptionInDestructor) {}
-
-class SehExceptionInSetUpTestSuiteTest : public Test {
- public:
-  static void SetUpTestSuite() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInSetUpTestSuiteTest, ThrowsExceptionInSetUpTestSuite) {}
-
-class SehExceptionInTearDownTestSuiteTest : public Test {
- public:
-  static void TearDownTestSuite() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInTearDownTestSuiteTest,
-       ThrowsExceptionInTearDownTestSuite) {}
-
-class SehExceptionInSetUpTest : public Test {
- protected:
-  virtual void SetUp() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInSetUpTest, ThrowsExceptionInSetUp) {}
-
-class SehExceptionInTearDownTest : public Test {
- protected:
-  virtual void TearDown() { RaiseException(42, 0, 0, NULL); }
-};
-
-TEST_F(SehExceptionInTearDownTest, ThrowsExceptionInTearDown) {}
-
-TEST(SehExceptionTest, ThrowsSehException) {
-  RaiseException(42, 0, 0, NULL);
-}
-
-#endif  // GTEST_HAS_SEH
-
-#if GTEST_HAS_EXCEPTIONS
-
-class CxxExceptionInConstructorTest : public Test {
- public:
-  CxxExceptionInConstructorTest() {
-    // Without this macro VC++ complains about unreachable code at the end of
-    // the constructor.
-    GTEST_SUPPRESS_UNREACHABLE_CODE_WARNING_BELOW_(
-        throw std::runtime_error("Standard C++ exception"));
-  }
-
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInConstructorTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInConstructorTest() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest destructor "
-                  << "called unexpectedly.";
-  }
-
-  void SetUp() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest::SetUp() "
-                  << "called unexpectedly.";
-  }
-
-  void TearDown() override {
-    ADD_FAILURE() << "CxxExceptionInConstructorTest::TearDown() "
-                  << "called unexpectedly.";
-  }
-};
-
-TEST_F(CxxExceptionInConstructorTest, ThrowsExceptionInConstructor) {
-  ADD_FAILURE() << "CxxExceptionInConstructorTest test body "
-                << "called unexpectedly.";
-}
-
-class CxxExceptionInSetUpTestSuiteTest : public Test {
- public:
-  CxxExceptionInSetUpTestSuiteTest() {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest constructor "
-           "called as expected.\n");
-  }
-
-  static void SetUpTestSuite() {
-    throw std::runtime_error("Standard C++ exception");
-  }
-
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInSetUpTestSuiteTest() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest destructor "
-           "called as expected.\n");
-  }
-
-  void SetUp() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::SetUp() "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInSetUpTestSuiteTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInSetUpTestSuiteTest, ThrowsExceptionInSetUpTestSuite) {
-  printf("%s",
-         "CxxExceptionInSetUpTestSuiteTest test body "
-         "called as expected.\n");
-}
-
-class CxxExceptionInTearDownTestSuiteTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    throw std::runtime_error("Standard C++ exception");
-  }
-};
-
-TEST_F(CxxExceptionInTearDownTestSuiteTest,
-       ThrowsExceptionInTearDownTestSuite) {}
-
-class CxxExceptionInSetUpTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInSetUpTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInSetUpTest() override {
-    printf("%s",
-           "CxxExceptionInSetUpTest destructor "
-           "called as expected.\n");
-  }
-
-  void SetUp() override { throw std::runtime_error("Standard C++ exception"); }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInSetUpTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInSetUpTest, ThrowsExceptionInSetUp) {
-  ADD_FAILURE() << "CxxExceptionInSetUpTest test body "
-                << "called unexpectedly.";
-}
-
-class CxxExceptionInTearDownTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInTearDownTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInTearDownTest() override {
-    printf("%s",
-           "CxxExceptionInTearDownTest destructor "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    throw std::runtime_error("Standard C++ exception");
-  }
-};
-
-TEST_F(CxxExceptionInTearDownTest, ThrowsExceptionInTearDown) {}
-
-class CxxExceptionInTestBodyTest : public Test {
- public:
-  static void TearDownTestSuite() {
-    printf("%s",
-           "CxxExceptionInTestBodyTest::TearDownTestSuite() "
-           "called as expected.\n");
-  }
-
- protected:
-  ~CxxExceptionInTestBodyTest() override {
-    printf("%s",
-           "CxxExceptionInTestBodyTest destructor "
-           "called as expected.\n");
-  }
-
-  void TearDown() override {
-    printf("%s",
-           "CxxExceptionInTestBodyTest::TearDown() "
-           "called as expected.\n");
-  }
-};
-
-TEST_F(CxxExceptionInTestBodyTest, ThrowsStdCxxException) {
-  throw std::runtime_error("Standard C++ exception");
-}
-
-TEST(CxxExceptionTest, ThrowsNonStdCxxException) {
-  throw "C-string";
-}
-
-// This terminate handler aborts the program using exit() rather than abort().
-// This avoids showing pop-ups on Windows systems and core dumps on Unix-like
-// ones.
-void TerminateHandler() {
-  fprintf(stderr, "%s\n", "Unhandled C++ exception terminating the program.");
-  fflush(nullptr);
-  exit(3);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-int main(int argc, char** argv) {
-#if GTEST_HAS_EXCEPTIONS
-  std::set_terminate(&TerminateHandler);
-#endif
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-color-test.py b/3rdparty/gtest/test/googletest-color-test.py
deleted file mode 100644
index f3b7c999..00000000
--- a/3rdparty/gtest/test/googletest-color-test.py
+++ /dev/null
@@ -1,127 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test correctly determines whether to use colors."""
-
-import os
-import gtest_test_utils
-
-IS_WINDOWS = os.name == 'nt'
-
-COLOR_ENV_VAR = 'GTEST_COLOR'
-COLOR_FLAG = 'gtest_color'
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-color-test_')
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    os.environ[env_var] = value
-  elif env_var in os.environ:
-    del os.environ[env_var]
-
-
-def UsesColor(term, color_env_var, color_flag):
-  """Runs googletest-color-test_ and returns its exit code."""
-
-  SetEnvVar('TERM', term)
-  SetEnvVar(COLOR_ENV_VAR, color_env_var)
-
-  if color_flag is None:
-    args = []
-  else:
-    args = ['--%s=%s' % (COLOR_FLAG, color_flag)]
-  p = gtest_test_utils.Subprocess([COMMAND] + args)
-  return not p.exited or p.exit_code
-
-
-class GTestColorTest(gtest_test_utils.TestCase):
-  def testNoEnvVarNoFlag(self):
-    """Tests the case when there's neither GTEST_COLOR nor --gtest_color."""
-
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('dumb', None, None))
-      self.assert_(not UsesColor('emacs', None, None))
-      self.assert_(not UsesColor('xterm-mono', None, None))
-      self.assert_(not UsesColor('unknown', None, None))
-      self.assert_(not UsesColor(None, None, None))
-    self.assert_(UsesColor('linux', None, None))
-    self.assert_(UsesColor('cygwin', None, None))
-    self.assert_(UsesColor('xterm', None, None))
-    self.assert_(UsesColor('xterm-color', None, None))
-    self.assert_(UsesColor('xterm-256color', None, None))
-
-  def testFlagOnly(self):
-    """Tests the case when there's --gtest_color but not GTEST_COLOR."""
-
-    self.assert_(not UsesColor('dumb', None, 'no'))
-    self.assert_(not UsesColor('xterm-color', None, 'no'))
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('emacs', None, 'auto'))
-    self.assert_(UsesColor('xterm', None, 'auto'))
-    self.assert_(UsesColor('dumb', None, 'yes'))
-    self.assert_(UsesColor('xterm', None, 'yes'))
-
-  def testEnvVarOnly(self):
-    """Tests the case when there's GTEST_COLOR but not --gtest_color."""
-
-    self.assert_(not UsesColor('dumb', 'no', None))
-    self.assert_(not UsesColor('xterm-color', 'no', None))
-    if not IS_WINDOWS:
-      self.assert_(not UsesColor('dumb', 'auto', None))
-    self.assert_(UsesColor('xterm-color', 'auto', None))
-    self.assert_(UsesColor('dumb', 'yes', None))
-    self.assert_(UsesColor('xterm-color', 'yes', None))
-
-  def testEnvVarAndFlag(self):
-    """Tests the case when there are both GTEST_COLOR and --gtest_color."""
-
-    self.assert_(not UsesColor('xterm-color', 'no', 'no'))
-    self.assert_(UsesColor('dumb', 'no', 'yes'))
-    self.assert_(UsesColor('xterm-color', 'no', 'auto'))
-
-  def testAliasesOfYesAndNo(self):
-    """Tests using aliases in specifying --gtest_color."""
-
-    self.assert_(UsesColor('dumb', None, 'true'))
-    self.assert_(UsesColor('dumb', None, 'YES'))
-    self.assert_(UsesColor('dumb', None, 'T'))
-    self.assert_(UsesColor('dumb', None, '1'))
-
-    self.assert_(not UsesColor('xterm', None, 'f'))
-    self.assert_(not UsesColor('xterm', None, 'false'))
-    self.assert_(not UsesColor('xterm', None, '0'))
-    self.assert_(not UsesColor('xterm', None, 'unknown'))
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-color-test_.cc b/3rdparty/gtest/test/googletest-color-test_.cc
deleted file mode 100644
index 220a3a00..00000000
--- a/3rdparty/gtest/test/googletest-color-test_.cc
+++ /dev/null
@@ -1,62 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// A helper program for testing how Google Test determines whether to use
-// colors in the output.  It prints "YES" and returns 1 if Google Test
-// decides to use colors, and prints "NO" and returns 0 otherwise.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-using testing::internal::ShouldUseColor;
-
-// The purpose of this is to ensure that the UnitTest singleton is
-// created before main() is entered, and thus that ShouldUseColor()
-// works the same way as in a real Google-Test-based test.  We don't actual
-// run the TEST itself.
-TEST(GTestColorTest, Dummy) {
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  if (ShouldUseColor(true)) {
-    // Google Test decides to use colors in the output (assuming it
-    // goes to a TTY).
-    printf("YES\n");
-    return 1;
-  } else {
-    // Google Test decides not to use colors in the output.
-    printf("NO\n");
-    return 0;
-  }
-}
diff --git a/3rdparty/gtest/test/googletest-death-test-test.cc b/3rdparty/gtest/test/googletest-death-test-test.cc
deleted file mode 100644
index cba906cc..00000000
--- a/3rdparty/gtest/test/googletest-death-test-test.cc
+++ /dev/null
@@ -1,1516 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for death tests.
-
-#include "gtest/gtest-death-test.h"
-
-#include "gtest/gtest.h"
-#include "gtest/internal/gtest-filepath.h"
-
-using testing::internal::AlwaysFalse;
-using testing::internal::AlwaysTrue;
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_OS_WINDOWS
-#  include <fcntl.h>           // For O_BINARY
-#  include <direct.h>          // For chdir().
-#  include <io.h>
-# else
-#  include <unistd.h>
-#  include <sys/wait.h>        // For waitpid.
-# endif  // GTEST_OS_WINDOWS
-
-# include <limits.h>
-# include <signal.h>
-# include <stdio.h>
-
-# if GTEST_OS_LINUX
-#  include <sys/time.h>
-# endif  // GTEST_OS_LINUX
-
-# include "gtest/gtest-spi.h"
-# include "src/gtest-internal-inl.h"
-
-namespace posix = ::testing::internal::posix;
-
-using testing::ContainsRegex;
-using testing::Matcher;
-using testing::Message;
-using testing::internal::DeathTest;
-using testing::internal::DeathTestFactory;
-using testing::internal::FilePath;
-using testing::internal::GetLastErrnoDescription;
-using testing::internal::GetUnitTestImpl;
-using testing::internal::InDeathTestChild;
-using testing::internal::ParseNaturalNumber;
-
-namespace testing {
-namespace internal {
-
-// A helper class whose objects replace the death test factory for a
-// single UnitTest object during their lifetimes.
-class ReplaceDeathTestFactory {
- public:
-  explicit ReplaceDeathTestFactory(DeathTestFactory* new_factory)
-      : unit_test_impl_(GetUnitTestImpl()) {
-    old_factory_ = unit_test_impl_->death_test_factory_.release();
-    unit_test_impl_->death_test_factory_.reset(new_factory);
-  }
-
-  ~ReplaceDeathTestFactory() {
-    unit_test_impl_->death_test_factory_.release();
-    unit_test_impl_->death_test_factory_.reset(old_factory_);
-  }
- private:
-  // Prevents copying ReplaceDeathTestFactory objects.
-  ReplaceDeathTestFactory(const ReplaceDeathTestFactory&);
-  void operator=(const ReplaceDeathTestFactory&);
-
-  UnitTestImpl* unit_test_impl_;
-  DeathTestFactory* old_factory_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-namespace {
-
-void DieWithMessage(const ::std::string& message) {
-  fprintf(stderr, "%s", message.c_str());
-  fflush(stderr);  // Make sure the text is printed before the process exits.
-
-  // We call _exit() instead of exit(), as the former is a direct
-  // system call and thus safer in the presence of threads.  exit()
-  // will invoke user-defined exit-hooks, which may do dangerous
-  // things that conflict with death tests.
-  //
-  // Some compilers can recognize that _exit() never returns and issue the
-  // 'unreachable code' warning for code following this function, unless
-  // fooled by a fake condition.
-  if (AlwaysTrue())
-    _exit(1);
-}
-
-void DieInside(const ::std::string& function) {
-  DieWithMessage("death inside " + function + "().");
-}
-
-// Tests that death tests work.
-
-class TestForDeathTest : public testing::Test {
- protected:
-  TestForDeathTest() : original_dir_(FilePath::GetCurrentDir()) {}
-
-  ~TestForDeathTest() override { posix::ChDir(original_dir_.c_str()); }
-
-  // A static member function that's expected to die.
-  static void StaticMemberFunction() { DieInside("StaticMemberFunction"); }
-
-  // A method of the test fixture that may die.
-  void MemberFunction() {
-    if (should_die_)
-      DieInside("MemberFunction");
-  }
-
-  // True if and only if MemberFunction() should die.
-  bool should_die_;
-  const FilePath original_dir_;
-};
-
-// A class with a member function that may die.
-class MayDie {
- public:
-  explicit MayDie(bool should_die) : should_die_(should_die) {}
-
-  // A member function that may die.
-  void MemberFunction() const {
-    if (should_die_)
-      DieInside("MayDie::MemberFunction");
-  }
-
- private:
-  // True if and only if MemberFunction() should die.
-  bool should_die_;
-};
-
-// A global function that's expected to die.
-void GlobalFunction() { DieInside("GlobalFunction"); }
-
-// A non-void function that's expected to die.
-int NonVoidFunction() {
-  DieInside("NonVoidFunction");
-  return 1;
-}
-
-// A unary function that may die.
-void DieIf(bool should_die) {
-  if (should_die)
-    DieInside("DieIf");
-}
-
-// A binary function that may die.
-bool DieIfLessThan(int x, int y) {
-  if (x < y) {
-    DieInside("DieIfLessThan");
-  }
-  return true;
-}
-
-// Tests that ASSERT_DEATH can be used outside a TEST, TEST_F, or test fixture.
-void DeathTestSubroutine() {
-  EXPECT_DEATH(GlobalFunction(), "death.*GlobalFunction");
-  ASSERT_DEATH(GlobalFunction(), "death.*GlobalFunction");
-}
-
-// Death in dbg, not opt.
-int DieInDebugElse12(int* sideeffect) {
-  if (sideeffect) *sideeffect = 12;
-
-# ifndef NDEBUG
-
-  DieInside("DieInDebugElse12");
-
-# endif  // NDEBUG
-
-  return 12;
-}
-
-# if GTEST_OS_WINDOWS
-
-// Death in dbg due to Windows CRT assertion failure, not opt.
-int DieInCRTDebugElse12(int* sideeffect) {
-  if (sideeffect) *sideeffect = 12;
-
-  // Create an invalid fd by closing a valid one
-  int fdpipe[2];
-  EXPECT_EQ(_pipe(fdpipe, 256, O_BINARY), 0);
-  EXPECT_EQ(_close(fdpipe[0]), 0);
-  EXPECT_EQ(_close(fdpipe[1]), 0);
-
-  // _dup() should crash in debug mode
-  EXPECT_EQ(_dup(fdpipe[0]), -1);
-
-  return 12;
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-// Tests the ExitedWithCode predicate.
-TEST(ExitStatusPredicateTest, ExitedWithCode) {
-  // On Windows, the process's exit code is the same as its exit status,
-  // so the predicate just compares the its input with its parameter.
-  EXPECT_TRUE(testing::ExitedWithCode(0)(0));
-  EXPECT_TRUE(testing::ExitedWithCode(1)(1));
-  EXPECT_TRUE(testing::ExitedWithCode(42)(42));
-  EXPECT_FALSE(testing::ExitedWithCode(0)(1));
-  EXPECT_FALSE(testing::ExitedWithCode(1)(0));
-}
-
-# else
-
-// Returns the exit status of a process that calls _exit(2) with a
-// given exit code.  This is a helper function for the
-// ExitStatusPredicateTest test suite.
-static int NormalExitStatus(int exit_code) {
-  pid_t child_pid = fork();
-  if (child_pid == 0) {
-    _exit(exit_code);
-  }
-  int status;
-  waitpid(child_pid, &status, 0);
-  return status;
-}
-
-// Returns the exit status of a process that raises a given signal.
-// If the signal does not cause the process to die, then it returns
-// instead the exit status of a process that exits normally with exit
-// code 1.  This is a helper function for the ExitStatusPredicateTest
-// test suite.
-static int KilledExitStatus(int signum) {
-  pid_t child_pid = fork();
-  if (child_pid == 0) {
-    raise(signum);
-    _exit(1);
-  }
-  int status;
-  waitpid(child_pid, &status, 0);
-  return status;
-}
-
-// Tests the ExitedWithCode predicate.
-TEST(ExitStatusPredicateTest, ExitedWithCode) {
-  const int status0  = NormalExitStatus(0);
-  const int status1  = NormalExitStatus(1);
-  const int status42 = NormalExitStatus(42);
-  const testing::ExitedWithCode pred0(0);
-  const testing::ExitedWithCode pred1(1);
-  const testing::ExitedWithCode pred42(42);
-  EXPECT_PRED1(pred0,  status0);
-  EXPECT_PRED1(pred1,  status1);
-  EXPECT_PRED1(pred42, status42);
-  EXPECT_FALSE(pred0(status1));
-  EXPECT_FALSE(pred42(status0));
-  EXPECT_FALSE(pred1(status42));
-}
-
-// Tests the KilledBySignal predicate.
-TEST(ExitStatusPredicateTest, KilledBySignal) {
-  const int status_segv = KilledExitStatus(SIGSEGV);
-  const int status_kill = KilledExitStatus(SIGKILL);
-  const testing::KilledBySignal pred_segv(SIGSEGV);
-  const testing::KilledBySignal pred_kill(SIGKILL);
-  EXPECT_PRED1(pred_segv, status_segv);
-  EXPECT_PRED1(pred_kill, status_kill);
-  EXPECT_FALSE(pred_segv(status_kill));
-  EXPECT_FALSE(pred_kill(status_segv));
-}
-
-# endif  // GTEST_OS_WINDOWS || GTEST_OS_FUCHSIA
-
-// Tests that the death test macros expand to code which may or may not
-// be followed by operator<<, and that in either case the complete text
-// comprises only a single C++ statement.
-TEST_F(TestForDeathTest, SingleStatement) {
-  if (AlwaysFalse())
-    // This would fail if executed; this is a compilation test only
-    ASSERT_DEATH(return, "");
-
-  if (AlwaysTrue())
-    EXPECT_DEATH(_exit(1), "");
-  else
-    // This empty "else" branch is meant to ensure that EXPECT_DEATH
-    // doesn't expand into an "if" statement without an "else"
-    ;
-
-  if (AlwaysFalse())
-    ASSERT_DEATH(return, "") << "did not die";
-
-  if (AlwaysFalse())
-    ;
-  else
-    EXPECT_DEATH(_exit(1), "") << 1 << 2 << 3;
-}
-
-# if GTEST_USES_PCRE
-
-void DieWithEmbeddedNul() {
-  fprintf(stderr, "Hello%cmy null world.\n", '\0');
-  fflush(stderr);
-  _exit(1);
-}
-
-// Tests that EXPECT_DEATH and ASSERT_DEATH work when the error
-// message has a NUL character in it.
-TEST_F(TestForDeathTest, EmbeddedNulInMessage) {
-  EXPECT_DEATH(DieWithEmbeddedNul(), "my null world");
-  ASSERT_DEATH(DieWithEmbeddedNul(), "my null world");
-}
-
-# endif  // GTEST_USES_PCRE
-
-// Tests that death test macros expand to code which interacts well with switch
-// statements.
-TEST_F(TestForDeathTest, SwitchStatement) {
-  // Microsoft compiler usually complains about switch statements without
-  // case labels. We suppress that warning for this test.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4065)
-
-  switch (0)
-    default:
-      ASSERT_DEATH(_exit(1), "") << "exit in default switch handler";
-
-  switch (0)
-    case 0:
-      EXPECT_DEATH(_exit(1), "") << "exit in switch case";
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-}
-
-// Tests that a static member function can be used in a "fast" style
-// death test.
-TEST_F(TestForDeathTest, StaticMemberFunctionFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  ASSERT_DEATH(StaticMemberFunction(), "death.*StaticMember");
-}
-
-// Tests that a method of the test fixture can be used in a "fast"
-// style death test.
-TEST_F(TestForDeathTest, MemberFunctionFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  should_die_ = true;
-  EXPECT_DEATH(MemberFunction(), "inside.*MemberFunction");
-}
-
-void ChangeToRootDir() { posix::ChDir(GTEST_PATH_SEP_); }
-
-// Tests that death tests work even if the current directory has been
-// changed.
-TEST_F(TestForDeathTest, FastDeathTestInChangedDir) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-
-  ChangeToRootDir();
-  EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
-
-  ChangeToRootDir();
-  ASSERT_DEATH(_exit(1), "");
-}
-
-# if GTEST_OS_LINUX
-void SigprofAction(int, siginfo_t*, void*) { /* no op */ }
-
-// Sets SIGPROF action and ITIMER_PROF timer (interval: 1ms).
-void SetSigprofActionAndTimer() {
-  struct itimerval timer;
-  timer.it_interval.tv_sec = 0;
-  timer.it_interval.tv_usec = 1;
-  timer.it_value = timer.it_interval;
-  ASSERT_EQ(0, setitimer(ITIMER_PROF, &timer, nullptr));
-  struct sigaction signal_action;
-  memset(&signal_action, 0, sizeof(signal_action));
-  sigemptyset(&signal_action.sa_mask);
-  signal_action.sa_sigaction = SigprofAction;
-  signal_action.sa_flags = SA_RESTART | SA_SIGINFO;
-  ASSERT_EQ(0, sigaction(SIGPROF, &signal_action, nullptr));
-}
-
-// Disables ITIMER_PROF timer and ignores SIGPROF signal.
-void DisableSigprofActionAndTimer(struct sigaction* old_signal_action) {
-  struct itimerval timer;
-  timer.it_interval.tv_sec = 0;
-  timer.it_interval.tv_usec = 0;
-  timer.it_value = timer.it_interval;
-  ASSERT_EQ(0, setitimer(ITIMER_PROF, &timer, nullptr));
-  struct sigaction signal_action;
-  memset(&signal_action, 0, sizeof(signal_action));
-  sigemptyset(&signal_action.sa_mask);
-  signal_action.sa_handler = SIG_IGN;
-  ASSERT_EQ(0, sigaction(SIGPROF, &signal_action, old_signal_action));
-}
-
-// Tests that death tests work when SIGPROF handler and timer are set.
-TEST_F(TestForDeathTest, FastSigprofActionSet) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  SetSigprofActionAndTimer();
-  EXPECT_DEATH(_exit(1), "");
-  struct sigaction old_signal_action;
-  DisableSigprofActionAndTimer(&old_signal_action);
-  EXPECT_TRUE(old_signal_action.sa_sigaction == SigprofAction);
-}
-
-TEST_F(TestForDeathTest, ThreadSafeSigprofActionSet) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  SetSigprofActionAndTimer();
-  EXPECT_DEATH(_exit(1), "");
-  struct sigaction old_signal_action;
-  DisableSigprofActionAndTimer(&old_signal_action);
-  EXPECT_TRUE(old_signal_action.sa_sigaction == SigprofAction);
-}
-# endif  // GTEST_OS_LINUX
-
-// Repeats a representative sample of death tests in the "threadsafe" style:
-
-TEST_F(TestForDeathTest, StaticMemberFunctionThreadsafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  ASSERT_DEATH(StaticMemberFunction(), "death.*StaticMember");
-}
-
-TEST_F(TestForDeathTest, MemberFunctionThreadsafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  should_die_ = true;
-  EXPECT_DEATH(MemberFunction(), "inside.*MemberFunction");
-}
-
-TEST_F(TestForDeathTest, ThreadsafeDeathTestInLoop) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-
-  for (int i = 0; i < 3; ++i)
-    EXPECT_EXIT(_exit(i), testing::ExitedWithCode(i), "") << ": i = " << i;
-}
-
-TEST_F(TestForDeathTest, ThreadsafeDeathTestInChangedDir) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-
-  ChangeToRootDir();
-  EXPECT_EXIT(_exit(1), testing::ExitedWithCode(1), "");
-
-  ChangeToRootDir();
-  ASSERT_DEATH(_exit(1), "");
-}
-
-TEST_F(TestForDeathTest, MixedStyles) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_DEATH(_exit(1), "");
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH(_exit(1), "");
-}
-
-# if GTEST_HAS_CLONE && GTEST_HAS_PTHREAD
-
-bool pthread_flag;
-
-void SetPthreadFlag() {
-  pthread_flag = true;
-}
-
-TEST_F(TestForDeathTest, DoesNotExecuteAtforkHooks) {
-  if (!testing::GTEST_FLAG(death_test_use_fork)) {
-    testing::GTEST_FLAG(death_test_style) = "threadsafe";
-    pthread_flag = false;
-    ASSERT_EQ(0, pthread_atfork(&SetPthreadFlag, nullptr, nullptr));
-    ASSERT_DEATH(_exit(1), "");
-    ASSERT_FALSE(pthread_flag);
-  }
-}
-
-# endif  // GTEST_HAS_CLONE && GTEST_HAS_PTHREAD
-
-// Tests that a method of another class can be used in a death test.
-TEST_F(TestForDeathTest, MethodOfAnotherClass) {
-  const MayDie x(true);
-  ASSERT_DEATH(x.MemberFunction(), "MayDie\\:\\:MemberFunction");
-}
-
-// Tests that a global function can be used in a death test.
-TEST_F(TestForDeathTest, GlobalFunction) {
-  EXPECT_DEATH(GlobalFunction(), "GlobalFunction");
-}
-
-// Tests that any value convertible to an RE works as a second
-// argument to EXPECT_DEATH.
-TEST_F(TestForDeathTest, AcceptsAnythingConvertibleToRE) {
-  static const char regex_c_str[] = "GlobalFunction";
-  EXPECT_DEATH(GlobalFunction(), regex_c_str);
-
-  const testing::internal::RE regex(regex_c_str);
-  EXPECT_DEATH(GlobalFunction(), regex);
-
-# if !GTEST_USES_PCRE
-
-  const ::std::string regex_std_str(regex_c_str);
-  EXPECT_DEATH(GlobalFunction(), regex_std_str);
-
-  // This one is tricky; a temporary pointer into another temporary.  Reference
-  // lifetime extension of the pointer is not sufficient.
-  EXPECT_DEATH(GlobalFunction(), ::std::string(regex_c_str).c_str());
-
-# endif  // !GTEST_USES_PCRE
-}
-
-// Tests that a non-void function can be used in a death test.
-TEST_F(TestForDeathTest, NonVoidFunction) {
-  ASSERT_DEATH(NonVoidFunction(), "NonVoidFunction");
-}
-
-// Tests that functions that take parameter(s) can be used in a death test.
-TEST_F(TestForDeathTest, FunctionWithParameter) {
-  EXPECT_DEATH(DieIf(true), "DieIf\\(\\)");
-  EXPECT_DEATH(DieIfLessThan(2, 3), "DieIfLessThan");
-}
-
-// Tests that ASSERT_DEATH can be used outside a TEST, TEST_F, or test fixture.
-TEST_F(TestForDeathTest, OutsideFixture) {
-  DeathTestSubroutine();
-}
-
-// Tests that death tests can be done inside a loop.
-TEST_F(TestForDeathTest, InsideLoop) {
-  for (int i = 0; i < 5; i++) {
-    EXPECT_DEATH(DieIfLessThan(-1, i), "DieIfLessThan") << "where i == " << i;
-  }
-}
-
-// Tests that a compound statement can be used in a death test.
-TEST_F(TestForDeathTest, CompoundStatement) {
-  EXPECT_DEATH({  // NOLINT
-    const int x = 2;
-    const int y = x + 1;
-    DieIfLessThan(x, y);
-  },
-  "DieIfLessThan");
-}
-
-// Tests that code that doesn't die causes a death test to fail.
-TEST_F(TestForDeathTest, DoesNotDie) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(DieIf(false), "DieIf"),
-                          "failed to die");
-}
-
-// Tests that a death test fails when the error message isn't expected.
-TEST_F(TestForDeathTest, ErrorMessageMismatch) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(DieIf(true), "DieIfLessThan") << "End of death test message.";
-  }, "died but not with expected error");
-}
-
-// On exit, *aborted will be true if and only if the EXPECT_DEATH()
-// statement aborted the function.
-void ExpectDeathTestHelper(bool* aborted) {
-  *aborted = true;
-  EXPECT_DEATH(DieIf(false), "DieIf");  // This assertion should fail.
-  *aborted = false;
-}
-
-// Tests that EXPECT_DEATH doesn't abort the test on failure.
-TEST_F(TestForDeathTest, EXPECT_DEATH) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(ExpectDeathTestHelper(&aborted),
-                          "failed to die");
-  EXPECT_FALSE(aborted);
-}
-
-// Tests that ASSERT_DEATH does abort the test on failure.
-TEST_F(TestForDeathTest, ASSERT_DEATH) {
-  static bool aborted;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    aborted = true;
-    ASSERT_DEATH(DieIf(false), "DieIf");  // This assertion should fail.
-    aborted = false;
-  }, "failed to die");
-  EXPECT_TRUE(aborted);
-}
-
-// Tests that EXPECT_DEATH evaluates the arguments exactly once.
-TEST_F(TestForDeathTest, SingleEvaluation) {
-  int x = 3;
-  EXPECT_DEATH(DieIf((++x) == 4), "DieIf");
-
-  const char* regex = "DieIf";
-  const char* regex_save = regex;
-  EXPECT_DEATH(DieIfLessThan(3, 4), regex++);
-  EXPECT_EQ(regex_save + 1, regex);
-}
-
-// Tests that run-away death tests are reported as failures.
-TEST_F(TestForDeathTest, RunawayIsFailure) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(static_cast<void>(0), "Foo"),
-                          "failed to die.");
-}
-
-// Tests that death tests report executing 'return' in the statement as
-// failure.
-TEST_F(TestForDeathTest, ReturnIsFailure) {
-  EXPECT_FATAL_FAILURE(ASSERT_DEATH(return, "Bar"),
-                       "illegal return in test statement.");
-}
-
-// Tests that EXPECT_DEBUG_DEATH works as expected, that is, you can stream a
-// message to it, and in debug mode it:
-// 1. Asserts on death.
-// 2. Has no side effect.
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, TestExpectDebugDeath) {
-  int sideeffect = 0;
-
-  // Put the regex in a local variable to make sure we don't get an "unused"
-  // warning in opt mode.
-  const char* regex = "death.*DieInDebugElse12";
-
-  EXPECT_DEBUG_DEATH(DieInDebugElse12(&sideeffect), regex)
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# if GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEBUG_DEATH works as expected when in debug mode
-// the Windows CRT crashes the process with an assertion failure.
-// 1. Asserts on death.
-// 2. Has no side effect (doesn't pop up a window or wait for user input).
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, CRTDebugDeath) {
-  int sideeffect = 0;
-
-  // Put the regex in a local variable to make sure we don't get an "unused"
-  // warning in opt mode.
-  const char* regex = "dup.* : Assertion failed";
-
-  EXPECT_DEBUG_DEATH(DieInCRTDebugElse12(&sideeffect), regex)
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# endif  // GTEST_OS_WINDOWS
-
-// Tests that ASSERT_DEBUG_DEATH works as expected, that is, you can stream a
-// message to it, and in debug mode it:
-// 1. Asserts on death.
-// 2. Has no side effect.
-//
-// And in opt mode, it:
-// 1.  Has side effects but does not assert.
-TEST_F(TestForDeathTest, TestAssertDebugDeath) {
-  int sideeffect = 0;
-
-  ASSERT_DEBUG_DEATH(DieInDebugElse12(&sideeffect), "death.*DieInDebugElse12")
-      << "Must accept a streamed message";
-
-# ifdef NDEBUG
-
-  // Checks that the assignment occurs in opt mode (sideeffect).
-  EXPECT_EQ(12, sideeffect);
-
-# else
-
-  // Checks that the assignment does not occur in dbg mode (no sideeffect).
-  EXPECT_EQ(0, sideeffect);
-
-# endif
-}
-
-# ifndef NDEBUG
-
-void ExpectDebugDeathHelper(bool* aborted) {
-  *aborted = true;
-  EXPECT_DEBUG_DEATH(return, "") << "This is expected to fail.";
-  *aborted = false;
-}
-
-#  if GTEST_OS_WINDOWS
-TEST(PopUpDeathTest, DoesNotShowPopUpOnAbort) {
-  printf("This test should be considered failing if it shows "
-         "any pop-up dialogs.\n");
-  fflush(stdout);
-
-  EXPECT_DEATH({
-    testing::GTEST_FLAG(catch_exceptions) = false;
-    abort();
-  }, "");
-}
-#  endif  // GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEBUG_DEATH in debug mode does not abort
-// the function.
-TEST_F(TestForDeathTest, ExpectDebugDeathDoesNotAbort) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(ExpectDebugDeathHelper(&aborted), "");
-  EXPECT_FALSE(aborted);
-}
-
-void AssertDebugDeathHelper(bool* aborted) {
-  *aborted = true;
-  GTEST_LOG_(INFO) << "Before ASSERT_DEBUG_DEATH";
-  ASSERT_DEBUG_DEATH(GTEST_LOG_(INFO) << "In ASSERT_DEBUG_DEATH"; return, "")
-      << "This is expected to fail.";
-  GTEST_LOG_(INFO) << "After ASSERT_DEBUG_DEATH";
-  *aborted = false;
-}
-
-// Tests that ASSERT_DEBUG_DEATH in debug mode aborts the function on
-// failure.
-TEST_F(TestForDeathTest, AssertDebugDeathAborts) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts2) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts3) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts4) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts5) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts6) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts7) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts8) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts9) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-TEST_F(TestForDeathTest, AssertDebugDeathAborts10) {
-  static bool aborted;
-  aborted = false;
-  EXPECT_FATAL_FAILURE(AssertDebugDeathHelper(&aborted), "");
-  EXPECT_TRUE(aborted);
-}
-
-# endif  // _NDEBUG
-
-// Tests the *_EXIT family of macros, using a variety of predicates.
-static void TestExitMacros() {
-  EXPECT_EXIT(_exit(1),  testing::ExitedWithCode(1),  "");
-  ASSERT_EXIT(_exit(42), testing::ExitedWithCode(42), "");
-
-# if GTEST_OS_WINDOWS
-
-  // Of all signals effects on the process exit code, only those of SIGABRT
-  // are documented on Windows.
-  // See https://msdn.microsoft.com/en-us/query-bi/m/dwwzkt4c.
-  EXPECT_EXIT(raise(SIGABRT), testing::ExitedWithCode(3), "") << "b_ar";
-
-# elif !GTEST_OS_FUCHSIA
-
-  // Fuchsia has no unix signals.
-  EXPECT_EXIT(raise(SIGKILL), testing::KilledBySignal(SIGKILL), "") << "foo";
-  ASSERT_EXIT(raise(SIGUSR2), testing::KilledBySignal(SIGUSR2), "") << "bar";
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EXIT(_exit(0), testing::KilledBySignal(SIGSEGV), "")
-      << "This failure is expected, too.";
-  }, "This failure is expected, too.");
-
-# endif  // GTEST_OS_WINDOWS
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_EXIT(raise(SIGSEGV), testing::ExitedWithCode(0), "")
-      << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-TEST_F(TestForDeathTest, ExitMacros) {
-  TestExitMacros();
-}
-
-TEST_F(TestForDeathTest, ExitMacrosUsingFork) {
-  testing::GTEST_FLAG(death_test_use_fork) = true;
-  TestExitMacros();
-}
-
-TEST_F(TestForDeathTest, InvalidStyle) {
-  testing::GTEST_FLAG(death_test_style) = "rococo";
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(_exit(0), "") << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-TEST_F(TestForDeathTest, DeathTestFailedOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("death\n"),
-                   "expected message"),
-      "Actual msg:\n"
-      "[  DEATH   ] death\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestUnexpectedReturnOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH({
-          fprintf(stderr, "returning\n");
-          fflush(stderr);
-          return;
-        }, ""),
-      "    Result: illegal return in test statement.\n"
-      " Error msg:\n"
-      "[  DEATH   ] returning\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestBadExitCodeOutput) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_EXIT(DieWithMessage("exiting with rc 1\n"),
-                  testing::ExitedWithCode(3),
-                  "expected message"),
-      "    Result: died but not with expected exit code:\n"
-      "            Exited with exit status 1\n"
-      "Actual msg:\n"
-      "[  DEATH   ] exiting with rc 1\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestMultiLineMatchFail) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("line 1\nline 2\nline 3\n"),
-                   "line 1\nxyz\nline 3\n"),
-      "Actual msg:\n"
-      "[  DEATH   ] line 1\n"
-      "[  DEATH   ] line 2\n"
-      "[  DEATH   ] line 3\n");
-}
-
-TEST_F(TestForDeathTest, DeathTestMultiLineMatchPass) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH(DieWithMessage("line 1\nline 2\nline 3\n"),
-               "line 1\nline 2\nline 3\n");
-}
-
-// A DeathTestFactory that returns MockDeathTests.
-class MockDeathTestFactory : public DeathTestFactory {
- public:
-  MockDeathTestFactory();
-  bool Create(const char* statement,
-              testing::Matcher<const std::string&> matcher, const char* file,
-              int line, DeathTest** test) override;
-
-  // Sets the parameters for subsequent calls to Create.
-  void SetParameters(bool create, DeathTest::TestRole role,
-                     int status, bool passed);
-
-  // Accessors.
-  int AssumeRoleCalls() const { return assume_role_calls_; }
-  int WaitCalls() const { return wait_calls_; }
-  size_t PassedCalls() const { return passed_args_.size(); }
-  bool PassedArgument(int n) const {
-    return passed_args_[static_cast<size_t>(n)];
-  }
-  size_t AbortCalls() const { return abort_args_.size(); }
-  DeathTest::AbortReason AbortArgument(int n) const {
-    return abort_args_[static_cast<size_t>(n)];
-  }
-  bool TestDeleted() const { return test_deleted_; }
-
- private:
-  friend class MockDeathTest;
-  // If true, Create will return a MockDeathTest; otherwise it returns
-  // NULL.
-  bool create_;
-  // The value a MockDeathTest will return from its AssumeRole method.
-  DeathTest::TestRole role_;
-  // The value a MockDeathTest will return from its Wait method.
-  int status_;
-  // The value a MockDeathTest will return from its Passed method.
-  bool passed_;
-
-  // Number of times AssumeRole was called.
-  int assume_role_calls_;
-  // Number of times Wait was called.
-  int wait_calls_;
-  // The arguments to the calls to Passed since the last call to
-  // SetParameters.
-  std::vector<bool> passed_args_;
-  // The arguments to the calls to Abort since the last call to
-  // SetParameters.
-  std::vector<DeathTest::AbortReason> abort_args_;
-  // True if the last MockDeathTest returned by Create has been
-  // deleted.
-  bool test_deleted_;
-};
-
-
-// A DeathTest implementation useful in testing.  It returns values set
-// at its creation from its various inherited DeathTest methods, and
-// reports calls to those methods to its parent MockDeathTestFactory
-// object.
-class MockDeathTest : public DeathTest {
- public:
-  MockDeathTest(MockDeathTestFactory *parent,
-                TestRole role, int status, bool passed) :
-      parent_(parent), role_(role), status_(status), passed_(passed) {
-  }
-  ~MockDeathTest() override { parent_->test_deleted_ = true; }
-  TestRole AssumeRole() override {
-    ++parent_->assume_role_calls_;
-    return role_;
-  }
-  int Wait() override {
-    ++parent_->wait_calls_;
-    return status_;
-  }
-  bool Passed(bool exit_status_ok) override {
-    parent_->passed_args_.push_back(exit_status_ok);
-    return passed_;
-  }
-  void Abort(AbortReason reason) override {
-    parent_->abort_args_.push_back(reason);
-  }
-
- private:
-  MockDeathTestFactory* const parent_;
-  const TestRole role_;
-  const int status_;
-  const bool passed_;
-};
-
-
-// MockDeathTestFactory constructor.
-MockDeathTestFactory::MockDeathTestFactory()
-    : create_(true),
-      role_(DeathTest::OVERSEE_TEST),
-      status_(0),
-      passed_(true),
-      assume_role_calls_(0),
-      wait_calls_(0),
-      passed_args_(),
-      abort_args_() {
-}
-
-
-// Sets the parameters for subsequent calls to Create.
-void MockDeathTestFactory::SetParameters(bool create,
-                                         DeathTest::TestRole role,
-                                         int status, bool passed) {
-  create_ = create;
-  role_ = role;
-  status_ = status;
-  passed_ = passed;
-
-  assume_role_calls_ = 0;
-  wait_calls_ = 0;
-  passed_args_.clear();
-  abort_args_.clear();
-}
-
-
-// Sets test to NULL (if create_ is false) or to the address of a new
-// MockDeathTest object with parameters taken from the last call
-// to SetParameters (if create_ is true).  Always returns true.
-bool MockDeathTestFactory::Create(
-    const char* /*statement*/, testing::Matcher<const std::string&> /*matcher*/,
-    const char* /*file*/, int /*line*/, DeathTest** test) {
-  test_deleted_ = false;
-  if (create_) {
-    *test = new MockDeathTest(this, role_, status_, passed_);
-  } else {
-    *test = nullptr;
-  }
-  return true;
-}
-
-// A test fixture for testing the logic of the GTEST_DEATH_TEST_ macro.
-// It installs a MockDeathTestFactory that is used for the duration
-// of the test case.
-class MacroLogicDeathTest : public testing::Test {
- protected:
-  static testing::internal::ReplaceDeathTestFactory* replacer_;
-  static MockDeathTestFactory* factory_;
-
-  static void SetUpTestSuite() {
-    factory_ = new MockDeathTestFactory;
-    replacer_ = new testing::internal::ReplaceDeathTestFactory(factory_);
-  }
-
-  static void TearDownTestSuite() {
-    delete replacer_;
-    replacer_ = nullptr;
-    delete factory_;
-    factory_ = nullptr;
-  }
-
-  // Runs a death test that breaks the rules by returning.  Such a death
-  // test cannot be run directly from a test routine that uses a
-  // MockDeathTest, or the remainder of the routine will not be executed.
-  static void RunReturningDeathTest(bool* flag) {
-    ASSERT_DEATH({  // NOLINT
-      *flag = true;
-      return;
-    }, "");
-  }
-};
-
-testing::internal::ReplaceDeathTestFactory* MacroLogicDeathTest::replacer_ =
-    nullptr;
-MockDeathTestFactory* MacroLogicDeathTest::factory_ = nullptr;
-
-// Test that nothing happens when the factory doesn't return a DeathTest:
-TEST_F(MacroLogicDeathTest, NothingHappens) {
-  bool flag = false;
-  factory_->SetParameters(false, DeathTest::OVERSEE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(0, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_FALSE(factory_->TestDeleted());
-}
-
-// Test that the parent process doesn't run the death test code,
-// and that the Passed method returns false when the (simulated)
-// child process exits with status 0:
-TEST_F(MacroLogicDeathTest, ChildExitsSuccessfully) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::OVERSEE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(1, factory_->WaitCalls());
-  ASSERT_EQ(1U, factory_->PassedCalls());
-  EXPECT_FALSE(factory_->PassedArgument(0));
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the Passed method was given the argument "true" when
-// the (simulated) child process exits with status 1:
-TEST_F(MacroLogicDeathTest, ChildExitsUnsuccessfully) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::OVERSEE_TEST, 1, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_FALSE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(1, factory_->WaitCalls());
-  ASSERT_EQ(1U, factory_->PassedCalls());
-  EXPECT_TRUE(factory_->PassedArgument(0));
-  EXPECT_EQ(0U, factory_->AbortCalls());
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the (simulated) child process executes the death test
-// code, and is aborted with the correct AbortReason if it
-// executes a return statement.
-TEST_F(MacroLogicDeathTest, ChildPerformsReturn) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::EXECUTE_TEST, 0, true);
-  RunReturningDeathTest(&flag);
-  EXPECT_TRUE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  EXPECT_EQ(1U, factory_->AbortCalls());
-  EXPECT_EQ(DeathTest::TEST_ENCOUNTERED_RETURN_STATEMENT,
-            factory_->AbortArgument(0));
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that the (simulated) child process is aborted with the
-// correct AbortReason if it does not die.
-TEST_F(MacroLogicDeathTest, ChildDoesNotDie) {
-  bool flag = false;
-  factory_->SetParameters(true, DeathTest::EXECUTE_TEST, 0, true);
-  EXPECT_DEATH(flag = true, "");
-  EXPECT_TRUE(flag);
-  EXPECT_EQ(1, factory_->AssumeRoleCalls());
-  EXPECT_EQ(0, factory_->WaitCalls());
-  EXPECT_EQ(0U, factory_->PassedCalls());
-  // This time there are two calls to Abort: one since the test didn't
-  // die, and another from the ReturnSentinel when it's destroyed.  The
-  // sentinel normally isn't destroyed if a test doesn't die, since
-  // _exit(2) is called in that case by ForkingDeathTest, but not by
-  // our MockDeathTest.
-  ASSERT_EQ(2U, factory_->AbortCalls());
-  EXPECT_EQ(DeathTest::TEST_DID_NOT_DIE,
-            factory_->AbortArgument(0));
-  EXPECT_EQ(DeathTest::TEST_ENCOUNTERED_RETURN_STATEMENT,
-            factory_->AbortArgument(1));
-  EXPECT_TRUE(factory_->TestDeleted());
-}
-
-// Tests that a successful death test does not register a successful
-// test part.
-TEST(SuccessRegistrationDeathTest, NoSuccessPart) {
-  EXPECT_DEATH(_exit(1), "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-TEST(StreamingAssertionsDeathTest, DeathTest) {
-  EXPECT_DEATH(_exit(1), "") << "unexpected failure";
-  ASSERT_DEATH(_exit(1), "") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_DEATH(_exit(0), "") << "expected failure";
-  }, "expected failure");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_DEATH(_exit(0), "") << "expected failure";
-  }, "expected failure");
-}
-
-// Tests that GetLastErrnoDescription returns an empty string when the
-// last error is 0 and non-empty string when it is non-zero.
-TEST(GetLastErrnoDescription, GetLastErrnoDescriptionWorks) {
-  errno = ENOENT;
-  EXPECT_STRNE("", GetLastErrnoDescription().c_str());
-  errno = 0;
-  EXPECT_STREQ("", GetLastErrnoDescription().c_str());
-}
-
-# if GTEST_OS_WINDOWS
-TEST(AutoHandleTest, AutoHandleWorks) {
-  HANDLE handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
-  ASSERT_NE(INVALID_HANDLE_VALUE, handle);
-
-  // Tests that the AutoHandle is correctly initialized with a handle.
-  testing::internal::AutoHandle auto_handle(handle);
-  EXPECT_EQ(handle, auto_handle.Get());
-
-  // Tests that Reset assigns INVALID_HANDLE_VALUE.
-  // Note that this cannot verify whether the original handle is closed.
-  auto_handle.Reset();
-  EXPECT_EQ(INVALID_HANDLE_VALUE, auto_handle.Get());
-
-  // Tests that Reset assigns the new handle.
-  // Note that this cannot verify whether the original handle is closed.
-  handle = ::CreateEvent(NULL, FALSE, FALSE, NULL);
-  ASSERT_NE(INVALID_HANDLE_VALUE, handle);
-  auto_handle.Reset(handle);
-  EXPECT_EQ(handle, auto_handle.Get());
-
-  // Tests that AutoHandle contains INVALID_HANDLE_VALUE by default.
-  testing::internal::AutoHandle auto_handle2;
-  EXPECT_EQ(INVALID_HANDLE_VALUE, auto_handle2.Get());
-}
-# endif  // GTEST_OS_WINDOWS
-
-# if GTEST_OS_WINDOWS
-typedef unsigned __int64 BiggestParsable;
-typedef signed __int64 BiggestSignedParsable;
-# else
-typedef unsigned long long BiggestParsable;
-typedef signed long long BiggestSignedParsable;
-# endif  // GTEST_OS_WINDOWS
-
-// We cannot use std::numeric_limits<T>::max() as it clashes with the
-// max() macro defined by <windows.h>.
-const BiggestParsable kBiggestParsableMax = ULLONG_MAX;
-const BiggestSignedParsable kBiggestSignedParsableMax = LLONG_MAX;
-
-TEST(ParseNaturalNumberTest, RejectsInvalidFormat) {
-  BiggestParsable result = 0;
-
-  // Rejects non-numbers.
-  EXPECT_FALSE(ParseNaturalNumber("non-number string", &result));
-
-  // Rejects numbers with whitespace prefix.
-  EXPECT_FALSE(ParseNaturalNumber(" 123", &result));
-
-  // Rejects negative numbers.
-  EXPECT_FALSE(ParseNaturalNumber("-123", &result));
-
-  // Rejects numbers starting with a plus sign.
-  EXPECT_FALSE(ParseNaturalNumber("+123", &result));
-  errno = 0;
-}
-
-TEST(ParseNaturalNumberTest, RejectsOverflownNumbers) {
-  BiggestParsable result = 0;
-
-  EXPECT_FALSE(ParseNaturalNumber("99999999999999999999999", &result));
-
-  signed char char_result = 0;
-  EXPECT_FALSE(ParseNaturalNumber("200", &char_result));
-  errno = 0;
-}
-
-TEST(ParseNaturalNumberTest, AcceptsValidNumbers) {
-  BiggestParsable result = 0;
-
-  result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &result));
-  EXPECT_EQ(123U, result);
-
-  // Check 0 as an edge case.
-  result = 1;
-  ASSERT_TRUE(ParseNaturalNumber("0", &result));
-  EXPECT_EQ(0U, result);
-
-  result = 1;
-  ASSERT_TRUE(ParseNaturalNumber("00000", &result));
-  EXPECT_EQ(0U, result);
-}
-
-TEST(ParseNaturalNumberTest, AcceptsTypeLimits) {
-  Message msg;
-  msg << kBiggestParsableMax;
-
-  BiggestParsable result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg.GetString(), &result));
-  EXPECT_EQ(kBiggestParsableMax, result);
-
-  Message msg2;
-  msg2 << kBiggestSignedParsableMax;
-
-  BiggestSignedParsable signed_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg2.GetString(), &signed_result));
-  EXPECT_EQ(kBiggestSignedParsableMax, signed_result);
-
-  Message msg3;
-  msg3 << INT_MAX;
-
-  int int_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg3.GetString(), &int_result));
-  EXPECT_EQ(INT_MAX, int_result);
-
-  Message msg4;
-  msg4 << UINT_MAX;
-
-  unsigned int uint_result = 0;
-  EXPECT_TRUE(ParseNaturalNumber(msg4.GetString(), &uint_result));
-  EXPECT_EQ(UINT_MAX, uint_result);
-}
-
-TEST(ParseNaturalNumberTest, WorksForShorterIntegers) {
-  short short_result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &short_result));
-  EXPECT_EQ(123, short_result);
-
-  signed char char_result = 0;
-  ASSERT_TRUE(ParseNaturalNumber("123", &char_result));
-  EXPECT_EQ(123, char_result);
-}
-
-# if GTEST_OS_WINDOWS
-TEST(EnvironmentTest, HandleFitsIntoSizeT) {
-  ASSERT_TRUE(sizeof(HANDLE) <= sizeof(size_t));
-}
-# endif  // GTEST_OS_WINDOWS
-
-// Tests that EXPECT_DEATH_IF_SUPPORTED/ASSERT_DEATH_IF_SUPPORTED trigger
-// failures when death tests are available on the system.
-TEST(ConditionalDeathMacrosDeathTest, ExpectsDeathWhenDeathTestsAvailable) {
-  EXPECT_DEATH_IF_SUPPORTED(DieInside("CondDeathTestExpectMacro"),
-                            "death inside CondDeathTestExpectMacro");
-  ASSERT_DEATH_IF_SUPPORTED(DieInside("CondDeathTestAssertMacro"),
-                            "death inside CondDeathTestAssertMacro");
-
-  // Empty statement will not crash, which must trigger a failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH_IF_SUPPORTED(;, ""), "");
-  EXPECT_FATAL_FAILURE(ASSERT_DEATH_IF_SUPPORTED(;, ""), "");
-}
-
-TEST(InDeathTestChildDeathTest, ReportsDeathTestCorrectlyInFastStyle) {
-  testing::GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_FALSE(InDeathTestChild());
-  EXPECT_DEATH({
-    fprintf(stderr, InDeathTestChild() ? "Inside" : "Outside");
-    fflush(stderr);
-    _exit(1);
-  }, "Inside");
-}
-
-TEST(InDeathTestChildDeathTest, ReportsDeathTestCorrectlyInThreadSafeStyle) {
-  testing::GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_FALSE(InDeathTestChild());
-  EXPECT_DEATH({
-    fprintf(stderr, InDeathTestChild() ? "Inside" : "Outside");
-    fflush(stderr);
-    _exit(1);
-  }, "Inside");
-}
-
-void DieWithMessage(const char* message) {
-  fputs(message, stderr);
-  fflush(stderr);  // Make sure the text is printed before the process exits.
-  _exit(1);
-}
-
-TEST(MatcherDeathTest, DoesNotBreakBareRegexMatching) {
-  // googletest tests this, of course; here we ensure that including googlemock
-  // has not broken it.
-  EXPECT_DEATH(DieWithMessage("O, I die, Horatio."), "I d[aeiou]e");
-}
-
-TEST(MatcherDeathTest, MonomorphicMatcherMatches) {
-  EXPECT_DEATH(DieWithMessage("Behind O, I am slain!"),
-               Matcher<const std::string&>(ContainsRegex("I am slain")));
-}
-
-TEST(MatcherDeathTest, MonomorphicMatcherDoesNotMatch) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(
-          DieWithMessage("Behind O, I am slain!"),
-          Matcher<const std::string&>(ContainsRegex("Ow, I am slain"))),
-      "Expected: contains regular expression \"Ow, I am slain\"");
-}
-
-TEST(MatcherDeathTest, PolymorphicMatcherMatches) {
-  EXPECT_DEATH(DieWithMessage("The rest is silence."),
-               ContainsRegex("rest is silence"));
-}
-
-TEST(MatcherDeathTest, PolymorphicMatcherDoesNotMatch) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_DEATH(DieWithMessage("The rest is silence."),
-                   ContainsRegex("rest is science")),
-      "Expected: contains regular expression \"rest is science\"");
-}
-
-}  // namespace
-
-#else  // !GTEST_HAS_DEATH_TEST follows
-
-namespace {
-
-using testing::internal::CaptureStderr;
-using testing::internal::GetCapturedStderr;
-
-// Tests that EXPECT_DEATH_IF_SUPPORTED/ASSERT_DEATH_IF_SUPPORTED are still
-// defined but do not trigger failures when death tests are not available on
-// the system.
-TEST(ConditionalDeathMacrosTest, WarnsWhenDeathTestsNotAvailable) {
-  // Empty statement will not crash, but that should not trigger a failure
-  // when death tests are not supported.
-  CaptureStderr();
-  EXPECT_DEATH_IF_SUPPORTED(;, "");
-  std::string output = GetCapturedStderr();
-  ASSERT_TRUE(NULL != strstr(output.c_str(),
-                             "Death tests are not supported on this platform"));
-  ASSERT_TRUE(NULL != strstr(output.c_str(), ";"));
-
-  // The streamed message should not be printed as there is no test failure.
-  CaptureStderr();
-  EXPECT_DEATH_IF_SUPPORTED(;, "") << "streamed message";
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL == strstr(output.c_str(), "streamed message"));
-
-  CaptureStderr();
-  ASSERT_DEATH_IF_SUPPORTED(;, "");  // NOLINT
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL != strstr(output.c_str(),
-                             "Death tests are not supported on this platform"));
-  ASSERT_TRUE(NULL != strstr(output.c_str(), ";"));
-
-  CaptureStderr();
-  ASSERT_DEATH_IF_SUPPORTED(;, "") << "streamed message";  // NOLINT
-  output = GetCapturedStderr();
-  ASSERT_TRUE(NULL == strstr(output.c_str(), "streamed message"));
-}
-
-void FuncWithAssert(int* n) {
-  ASSERT_DEATH_IF_SUPPORTED(return;, "");
-  (*n)++;
-}
-
-// Tests that ASSERT_DEATH_IF_SUPPORTED does not return from the current
-// function (as ASSERT_DEATH does) if death tests are not supported.
-TEST(ConditionalDeathMacrosTest, AssertDeatDoesNotReturnhIfUnsupported) {
-  int n = 0;
-  FuncWithAssert(&n);
-  EXPECT_EQ(1, n);
-}
-
-}  // namespace
-
-#endif  // !GTEST_HAS_DEATH_TEST
-
-namespace {
-
-// Tests that the death test macros expand to code which may or may not
-// be followed by operator<<, and that in either case the complete text
-// comprises only a single C++ statement.
-//
-// The syntax should work whether death tests are available or not.
-TEST(ConditionalDeathMacrosSyntaxDeathTest, SingleStatement) {
-  if (AlwaysFalse())
-    // This would fail if executed; this is a compilation test only
-    ASSERT_DEATH_IF_SUPPORTED(return, "");
-
-  if (AlwaysTrue())
-    EXPECT_DEATH_IF_SUPPORTED(_exit(1), "");
-  else
-    // This empty "else" branch is meant to ensure that EXPECT_DEATH
-    // doesn't expand into an "if" statement without an "else"
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_DEATH_IF_SUPPORTED(return, "") << "did not die";
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    EXPECT_DEATH_IF_SUPPORTED(_exit(1), "") << 1 << 2 << 3;
-}
-
-// Tests that conditional death test macros expand to code which interacts
-// well with switch statements.
-TEST(ConditionalDeathMacrosSyntaxDeathTest, SwitchStatement) {
-  // Microsoft compiler usually complains about switch statements without
-  // case labels. We suppress that warning for this test.
-  GTEST_DISABLE_MSC_WARNINGS_PUSH_(4065)
-
-  switch (0)
-    default:
-      ASSERT_DEATH_IF_SUPPORTED(_exit(1), "")
-          << "exit in default switch handler";
-
-  switch (0)
-    case 0:
-      EXPECT_DEATH_IF_SUPPORTED(_exit(1), "") << "exit in switch case";
-
-  GTEST_DISABLE_MSC_WARNINGS_POP_()
-}
-
-// Tests that a test case whose name ends with "DeathTest" works fine
-// on Windows.
-TEST(NotADeathTest, Test) {
-  SUCCEED();
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/test/googletest-death-test_ex_test.cc b/3rdparty/gtest/test/googletest-death-test_ex_test.cc
deleted file mode 100644
index 7ea5b946..00000000
--- a/3rdparty/gtest/test/googletest-death-test_ex_test.cc
+++ /dev/null
@@ -1,92 +0,0 @@
-// Copyright 2010, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests that verify interaction of exceptions and death tests.
-
-#include "gtest/gtest-death-test.h"
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_DEATH_TEST
-
-# if GTEST_HAS_SEH
-#  include <windows.h>          // For RaiseException().
-# endif
-
-# include "gtest/gtest-spi.h"
-
-# if GTEST_HAS_EXCEPTIONS
-
-#  include <exception>  // For std::exception.
-
-// Tests that death tests report thrown exceptions as failures and that the
-// exceptions do not escape death test macros.
-TEST(CxxExceptionDeathTest, ExceptionIsFailure) {
-  try {
-    EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw 1, ""), "threw an exception");
-  } catch (...) {  // NOLINT
-    FAIL() << "An exception escaped a death test macro invocation "
-           << "with catch_exceptions "
-           << (testing::GTEST_FLAG(catch_exceptions) ? "enabled" : "disabled");
-  }
-}
-
-class TestException : public std::exception {
- public:
-  const char* what() const throw() override { return "exceptional message"; }
-};
-
-TEST(CxxExceptionDeathTest, PrintsMessageForStdExceptions) {
-  // Verifies that the exception message is quoted in the failure text.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw TestException(), ""),
-                          "exceptional message");
-  // Verifies that the location is mentioned in the failure text.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DEATH(throw TestException(), ""),
-                          __FILE__);
-}
-# endif  // GTEST_HAS_EXCEPTIONS
-
-# if GTEST_HAS_SEH
-// Tests that enabling interception of SEH exceptions with the
-// catch_exceptions flag does not interfere with SEH exceptions being
-// treated as death by death tests.
-TEST(SehExceptionDeasTest, CatchExceptionsDoesNotInterfere) {
-  EXPECT_DEATH(RaiseException(42, 0x0, 0, NULL), "")
-      << "with catch_exceptions "
-      << (testing::GTEST_FLAG(catch_exceptions) ? "enabled" : "disabled");
-}
-# endif
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  testing::GTEST_FLAG(catch_exceptions) = GTEST_ENABLE_CATCH_EXCEPTIONS_ != 0;
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-env-var-test.py b/3rdparty/gtest/test/googletest-env-var-test.py
deleted file mode 100644
index 2f0e406a..00000000
--- a/3rdparty/gtest/test/googletest-env-var-test.py
+++ /dev/null
@@ -1,117 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test correctly parses environment variables."""
-
-import os
-import gtest_test_utils
-
-
-IS_WINDOWS = os.name == 'nt'
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-env-var-test_')
-
-environ = os.environ.copy()
-
-
-def AssertEq(expected, actual):
-  if expected != actual:
-    print('Expected: %s' % (expected,))
-    print('  Actual: %s' % (actual,))
-    raise AssertionError
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-def GetFlag(flag):
-  """Runs googletest-env-var-test_ and returns its output."""
-
-  args = [COMMAND]
-  if flag is not None:
-    args += [flag]
-  return gtest_test_utils.Subprocess(args, env=environ).output
-
-
-def TestFlag(flag, test_val, default_val):
-  """Verifies that the given flag is affected by the corresponding env var."""
-
-  env_var = 'GTEST_' + flag.upper()
-  SetEnvVar(env_var, test_val)
-  AssertEq(test_val, GetFlag(flag))
-  SetEnvVar(env_var, None)
-  AssertEq(default_val, GetFlag(flag))
-
-
-class GTestEnvVarTest(gtest_test_utils.TestCase):
-
-  def testEnvVarAffectsFlag(self):
-    """Tests that environment variable should affect the corresponding flag."""
-
-    TestFlag('break_on_failure', '1', '0')
-    TestFlag('color', 'yes', 'auto')
-    TestFlag('filter', 'FooTest.Bar', '*')
-    SetEnvVar('XML_OUTPUT_FILE', None)  # For 'output' test
-    TestFlag('output', 'xml:tmp/foo.xml', '')
-    TestFlag('print_time', '0', '1')
-    TestFlag('repeat', '999', '1')
-    TestFlag('throw_on_failure', '1', '0')
-    TestFlag('death_test_style', 'threadsafe', 'fast')
-    TestFlag('catch_exceptions', '0', '1')
-
-    if IS_LINUX:
-      TestFlag('death_test_use_fork', '1', '0')
-      TestFlag('stack_trace_depth', '0', '100')
-
-
-  def testXmlOutputFile(self):
-    """Tests that $XML_OUTPUT_FILE affects the output flag."""
-
-    SetEnvVar('GTEST_OUTPUT', None)
-    SetEnvVar('XML_OUTPUT_FILE', 'tmp/bar.xml')
-    AssertEq('xml:tmp/bar.xml', GetFlag('output'))
-
-  def testXmlOutputFileOverride(self):
-    """Tests that $XML_OUTPUT_FILE is overridden by $GTEST_OUTPUT."""
-
-    SetEnvVar('GTEST_OUTPUT', 'xml:tmp/foo.xml')
-    SetEnvVar('XML_OUTPUT_FILE', 'tmp/bar.xml')
-    AssertEq('xml:tmp/foo.xml', GetFlag('output'))
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-env-var-test_.cc b/3rdparty/gtest/test/googletest-env-var-test_.cc
deleted file mode 100644
index fd2aa82f..00000000
--- a/3rdparty/gtest/test/googletest-env-var-test_.cc
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// A helper program for testing that Google Test parses the environment
-// variables correctly.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-using ::std::cout;
-
-namespace testing {
-
-// The purpose of this is to make the test more realistic by ensuring
-// that the UnitTest singleton is created before main() is entered.
-// We don't actual run the TEST itself.
-TEST(GTestEnvVarTest, Dummy) {
-}
-
-void PrintFlag(const char* flag) {
-  if (strcmp(flag, "break_on_failure") == 0) {
-    cout << GTEST_FLAG(break_on_failure);
-    return;
-  }
-
-  if (strcmp(flag, "catch_exceptions") == 0) {
-    cout << GTEST_FLAG(catch_exceptions);
-    return;
-  }
-
-  if (strcmp(flag, "color") == 0) {
-    cout << GTEST_FLAG(color);
-    return;
-  }
-
-  if (strcmp(flag, "death_test_style") == 0) {
-    cout << GTEST_FLAG(death_test_style);
-    return;
-  }
-
-  if (strcmp(flag, "death_test_use_fork") == 0) {
-    cout << GTEST_FLAG(death_test_use_fork);
-    return;
-  }
-
-  if (strcmp(flag, "filter") == 0) {
-    cout << GTEST_FLAG(filter);
-    return;
-  }
-
-  if (strcmp(flag, "output") == 0) {
-    cout << GTEST_FLAG(output);
-    return;
-  }
-
-  if (strcmp(flag, "print_time") == 0) {
-    cout << GTEST_FLAG(print_time);
-    return;
-  }
-
-  if (strcmp(flag, "repeat") == 0) {
-    cout << GTEST_FLAG(repeat);
-    return;
-  }
-
-  if (strcmp(flag, "stack_trace_depth") == 0) {
-    cout << GTEST_FLAG(stack_trace_depth);
-    return;
-  }
-
-  if (strcmp(flag, "throw_on_failure") == 0) {
-    cout << GTEST_FLAG(throw_on_failure);
-    return;
-  }
-
-  cout << "Invalid flag name " << flag
-       << ".  Valid names are break_on_failure, color, filter, etc.\n";
-  exit(1);
-}
-
-}  // namespace testing
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  if (argc != 2) {
-    cout << "Usage: googletest-env-var-test_ NAME_OF_FLAG\n";
-    return 1;
-  }
-
-  testing::PrintFlag(argv[1]);
-  return 0;
-}
diff --git a/3rdparty/gtest/test/googletest-filepath-test.cc b/3rdparty/gtest/test/googletest-filepath-test.cc
deleted file mode 100644
index aafad36f..00000000
--- a/3rdparty/gtest/test/googletest-filepath-test.cc
+++ /dev/null
@@ -1,649 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test filepath utilities
-//
-// This file tests classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included from gtest-internal.h.
-// Do not #include this file anywhere else!
-
-#include "gtest/internal/gtest-filepath.h"
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>  // NOLINT
-#elif GTEST_OS_WINDOWS
-# include <direct.h>  // NOLINT
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-namespace testing {
-namespace internal {
-namespace {
-
-#if GTEST_OS_WINDOWS_MOBILE
-
-// Windows CE doesn't have the remove C function.
-int remove(const char* path) {
-  LPCWSTR wpath = String::AnsiToUtf16(path);
-  int ret = DeleteFile(wpath) ? 0 : -1;
-  delete [] wpath;
-  return ret;
-}
-// Windows CE doesn't have the _rmdir C function.
-int _rmdir(const char* path) {
-  FilePath filepath(path);
-  LPCWSTR wpath = String::AnsiToUtf16(
-      filepath.RemoveTrailingPathSeparator().c_str());
-  int ret = RemoveDirectory(wpath) ? 0 : -1;
-  delete [] wpath;
-  return ret;
-}
-
-#else
-
-TEST(GetCurrentDirTest, ReturnsCurrentDir) {
-  const FilePath original_dir = FilePath::GetCurrentDir();
-  EXPECT_FALSE(original_dir.IsEmpty());
-
-  posix::ChDir(GTEST_PATH_SEP_);
-  const FilePath cwd = FilePath::GetCurrentDir();
-  posix::ChDir(original_dir.c_str());
-
-# if GTEST_OS_WINDOWS || GTEST_OS_OS2
-
-  // Skips the ":".
-  const char* const cwd_without_drive = strchr(cwd.c_str(), ':');
-  ASSERT_TRUE(cwd_without_drive != NULL);
-  EXPECT_STREQ(GTEST_PATH_SEP_, cwd_without_drive + 1);
-
-# else
-
-  EXPECT_EQ(GTEST_PATH_SEP_, cwd.string());
-
-# endif
-}
-
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-TEST(IsEmptyTest, ReturnsTrueForEmptyPath) {
-  EXPECT_TRUE(FilePath("").IsEmpty());
-}
-
-TEST(IsEmptyTest, ReturnsFalseForNonEmptyPath) {
-  EXPECT_FALSE(FilePath("a").IsEmpty());
-  EXPECT_FALSE(FilePath(".").IsEmpty());
-  EXPECT_FALSE(FilePath("a/b").IsEmpty());
-  EXPECT_FALSE(FilePath("a\\b\\").IsEmpty());
-}
-
-// RemoveDirectoryName "" -> ""
-TEST(RemoveDirectoryNameTest, WhenEmptyName) {
-  EXPECT_EQ("", FilePath("").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ButNoDirectory) {
-  EXPECT_EQ("afile",
-      FilePath("afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, RootFileShouldGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath(GTEST_PATH_SEP_ "afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/" -> ""
-TEST(RemoveDirectoryNameTest, WhereThereIsNoFileName) {
-  EXPECT_EQ("",
-      FilePath("adir" GTEST_PATH_SEP_).RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath("adir" GTEST_PATH_SEP_ "afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName "adir/subdir/afile" -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldAlsoGiveFileName) {
-  EXPECT_EQ("afile",
-      FilePath("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_ "afile")
-      .RemoveDirectoryName().string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that RemoveDirectoryName() works with the alternate separator
-// on Windows.
-
-// RemoveDirectoryName("/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, RootFileShouldGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile", FilePath("/afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/") -> ""
-TEST(RemoveDirectoryNameTest, WhereThereIsNoFileNameForAlternateSeparator) {
-  EXPECT_EQ("", FilePath("adir/").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile", FilePath("adir/afile").RemoveDirectoryName().string());
-}
-
-// RemoveDirectoryName("adir/subdir/afile") -> "afile"
-TEST(RemoveDirectoryNameTest, ShouldAlsoGiveFileNameForAlternateSeparator) {
-  EXPECT_EQ("afile",
-            FilePath("adir/subdir/afile").RemoveDirectoryName().string());
-}
-
-#endif
-
-// RemoveFileName "" -> "./"
-TEST(RemoveFileNameTest, EmptyName) {
-#if GTEST_OS_WINDOWS_MOBILE
-  // On Windows CE, we use the root as the current directory.
-  EXPECT_EQ(GTEST_PATH_SEP_, FilePath("").RemoveFileName().string());
-#else
-  EXPECT_EQ("." GTEST_PATH_SEP_, FilePath("").RemoveFileName().string());
-#endif
-}
-
-// RemoveFileName "adir/" -> "adir/"
-TEST(RemoveFileNameTest, ButNoFile) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-      FilePath("adir" GTEST_PATH_SEP_).RemoveFileName().string());
-}
-
-// RemoveFileName "adir/afile" -> "adir/"
-TEST(RemoveFileNameTest, GivesDirName) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir" GTEST_PATH_SEP_ "afile").RemoveFileName().string());
-}
-
-// RemoveFileName "adir/subdir/afile" -> "adir/subdir/"
-TEST(RemoveFileNameTest, GivesDirAndSubDirName) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_,
-      FilePath("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_ "afile")
-      .RemoveFileName().string());
-}
-
-// RemoveFileName "/afile" -> "/"
-TEST(RemoveFileNameTest, GivesRootDir) {
-  EXPECT_EQ(GTEST_PATH_SEP_,
-      FilePath(GTEST_PATH_SEP_ "afile").RemoveFileName().string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that RemoveFileName() works with the alternate separator on
-// Windows.
-
-// RemoveFileName("adir/") -> "adir/"
-TEST(RemoveFileNameTest, ButNoFileForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir/").RemoveFileName().string());
-}
-
-// RemoveFileName("adir/afile") -> "adir/"
-TEST(RemoveFileNameTest, GivesDirNameForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_,
-            FilePath("adir/afile").RemoveFileName().string());
-}
-
-// RemoveFileName("adir/subdir/afile") -> "adir/subdir/"
-TEST(RemoveFileNameTest, GivesDirAndSubDirNameForAlternateSeparator) {
-  EXPECT_EQ("adir" GTEST_PATH_SEP_ "subdir" GTEST_PATH_SEP_,
-            FilePath("adir/subdir/afile").RemoveFileName().string());
-}
-
-// RemoveFileName("/afile") -> "\"
-TEST(RemoveFileNameTest, GivesRootDirForAlternateSeparator) {
-  EXPECT_EQ(GTEST_PATH_SEP_, FilePath("/afile").RemoveFileName().string());
-}
-
-#endif
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo"), FilePath("bar"),
-      0, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameNumberGtZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo"), FilePath("bar"),
-      12, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar_12.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameWithSlashNumberIsZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar"), 0, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateFileNameWithSlashNumberGtZero) {
-  FilePath actual = FilePath::MakeFileName(FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar"), 12, "xml");
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar_12.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsZeroAndDirIsEmpty) {
-  FilePath actual = FilePath::MakeFileName(FilePath(""), FilePath("bar"),
-      0, "xml");
-  EXPECT_EQ("bar.xml", actual.string());
-}
-
-TEST(MakeFileNameTest, GenerateWhenNumberIsNotZeroAndDirIsEmpty) {
-  FilePath actual = FilePath::MakeFileName(FilePath(""), FilePath("bar"),
-      14, "xml");
-  EXPECT_EQ("bar_14.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, WorksWhenDirDoesNotEndWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, WorksWhenPath1EndsWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo" GTEST_PATH_SEP_),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, Path1BeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath(""),
-                                          FilePath("bar.xml"));
-  EXPECT_EQ("bar.xml", actual.string());
-}
-
-TEST(ConcatPathsTest, Path2BeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"), FilePath(""));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_, actual.string());
-}
-
-TEST(ConcatPathsTest, BothPathBeingEmpty) {
-  FilePath actual = FilePath::ConcatPaths(FilePath(""),
-                                          FilePath(""));
-  EXPECT_EQ("", actual.string());
-}
-
-TEST(ConcatPathsTest, Path1ContainsPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo" GTEST_PATH_SEP_ "bar"),
-                                          FilePath("foobar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_ "foobar.xml",
-            actual.string());
-}
-
-TEST(ConcatPathsTest, Path2ContainsPathSep) {
-  FilePath actual = FilePath::ConcatPaths(
-      FilePath("foo" GTEST_PATH_SEP_),
-      FilePath("bar" GTEST_PATH_SEP_ "bar.xml"));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_ "bar.xml",
-            actual.string());
-}
-
-TEST(ConcatPathsTest, Path2EndsWithPathSep) {
-  FilePath actual = FilePath::ConcatPaths(FilePath("foo"),
-                                          FilePath("bar" GTEST_PATH_SEP_));
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_, actual.string());
-}
-
-// RemoveTrailingPathSeparator "" -> ""
-TEST(RemoveTrailingPathSeparatorTest, EmptyString) {
-  EXPECT_EQ("", FilePath("").RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo" -> "foo"
-TEST(RemoveTrailingPathSeparatorTest, FileNoSlashString) {
-  EXPECT_EQ("foo", FilePath("foo").RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo/" -> "foo"
-TEST(RemoveTrailingPathSeparatorTest, ShouldRemoveTrailingSeparator) {
-  EXPECT_EQ("foo",
-      FilePath("foo" GTEST_PATH_SEP_).RemoveTrailingPathSeparator().string());
-#if GTEST_HAS_ALT_PATH_SEP_
-  EXPECT_EQ("foo", FilePath("foo/").RemoveTrailingPathSeparator().string());
-#endif
-}
-
-// RemoveTrailingPathSeparator "foo/bar/" -> "foo/bar/"
-TEST(RemoveTrailingPathSeparatorTest, ShouldRemoveLastSeparator) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar" GTEST_PATH_SEP_)
-                .RemoveTrailingPathSeparator().string());
-}
-
-// RemoveTrailingPathSeparator "foo/bar" -> "foo/bar"
-TEST(RemoveTrailingPathSeparatorTest, ShouldReturnUnmodified) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar")
-                .RemoveTrailingPathSeparator().string());
-}
-
-TEST(DirectoryTest, RootDirectoryExists) {
-#if GTEST_OS_WINDOWS  // We are on Windows.
-  char current_drive[_MAX_PATH];  // NOLINT
-  current_drive[0] = static_cast<char>(_getdrive() + 'A' - 1);
-  current_drive[1] = ':';
-  current_drive[2] = '\\';
-  current_drive[3] = '\0';
-  EXPECT_TRUE(FilePath(current_drive).DirectoryExists());
-#else
-  EXPECT_TRUE(FilePath("/").DirectoryExists());
-#endif  // GTEST_OS_WINDOWS
-}
-
-#if GTEST_OS_WINDOWS
-TEST(DirectoryTest, RootOfWrongDriveDoesNotExists) {
-  const int saved_drive_ = _getdrive();
-  // Find a drive that doesn't exist. Start with 'Z' to avoid common ones.
-  for (char drive = 'Z'; drive >= 'A'; drive--)
-    if (_chdrive(drive - 'A' + 1) == -1) {
-      char non_drive[_MAX_PATH];  // NOLINT
-      non_drive[0] = drive;
-      non_drive[1] = ':';
-      non_drive[2] = '\\';
-      non_drive[3] = '\0';
-      EXPECT_FALSE(FilePath(non_drive).DirectoryExists());
-      break;
-    }
-  _chdrive(saved_drive_);
-}
-#endif  // GTEST_OS_WINDOWS
-
-#if !GTEST_OS_WINDOWS_MOBILE
-// Windows CE _does_ consider an empty directory to exist.
-TEST(DirectoryTest, EmptyPathDirectoryDoesNotExist) {
-  EXPECT_FALSE(FilePath("").DirectoryExists());
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-TEST(DirectoryTest, CurrentDirectoryExists) {
-#if GTEST_OS_WINDOWS  // We are on Windows.
-# ifndef _WIN32_CE  // Windows CE doesn't have a current directory.
-
-  EXPECT_TRUE(FilePath(".").DirectoryExists());
-  EXPECT_TRUE(FilePath(".\\").DirectoryExists());
-
-# endif  // _WIN32_CE
-#else
-  EXPECT_TRUE(FilePath(".").DirectoryExists());
-  EXPECT_TRUE(FilePath("./").DirectoryExists());
-#endif  // GTEST_OS_WINDOWS
-}
-
-// "foo/bar" == foo//bar" == "foo///bar"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsInMidstring) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_ "bar",
-            FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_
-                     GTEST_PATH_SEP_ "bar").string());
-}
-
-// "/bar" == //bar" == "///bar"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsAtStringStart) {
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-  EXPECT_EQ(GTEST_PATH_SEP_ "bar",
-    FilePath(GTEST_PATH_SEP_ GTEST_PATH_SEP_ GTEST_PATH_SEP_ "bar").string());
-}
-
-// "foo/" == foo//" == "foo///"
-TEST(NormalizeTest, MultipleConsecutiveSepaparatorsAtStringEnd) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_).string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_).string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-    FilePath("foo" GTEST_PATH_SEP_ GTEST_PATH_SEP_ GTEST_PATH_SEP_).string());
-}
-
-#if GTEST_HAS_ALT_PATH_SEP_
-
-// Tests that separators at the end of the string are normalized
-// regardless of their combination (e.g. "foo\" =="foo/\" ==
-// "foo\\/").
-TEST(NormalizeTest, MixAlternateSeparatorAtStringEnd) {
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo/").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo" GTEST_PATH_SEP_ "/").string());
-  EXPECT_EQ("foo" GTEST_PATH_SEP_,
-            FilePath("foo//" GTEST_PATH_SEP_).string());
-}
-
-#endif
-
-TEST(AssignmentOperatorTest, DefaultAssignedToNonDefault) {
-  FilePath default_path;
-  FilePath non_default_path("path");
-  non_default_path = default_path;
-  EXPECT_EQ("", non_default_path.string());
-  EXPECT_EQ("", default_path.string());  // RHS var is unchanged.
-}
-
-TEST(AssignmentOperatorTest, NonDefaultAssignedToDefault) {
-  FilePath non_default_path("path");
-  FilePath default_path;
-  default_path = non_default_path;
-  EXPECT_EQ("path", default_path.string());
-  EXPECT_EQ("path", non_default_path.string());  // RHS var is unchanged.
-}
-
-TEST(AssignmentOperatorTest, ConstAssignedToNonConst) {
-  const FilePath const_default_path("const_path");
-  FilePath non_default_path("path");
-  non_default_path = const_default_path;
-  EXPECT_EQ("const_path", non_default_path.string());
-}
-
-class DirectoryCreationTest : public Test {
- protected:
-  void SetUp() override {
-    testdata_path_.Set(FilePath(
-        TempDir() + GetCurrentExecutableName().string() +
-        "_directory_creation" GTEST_PATH_SEP_ "test" GTEST_PATH_SEP_));
-    testdata_file_.Set(testdata_path_.RemoveTrailingPathSeparator());
-
-    unique_file0_.Set(FilePath::MakeFileName(testdata_path_, FilePath("unique"),
-        0, "txt"));
-    unique_file1_.Set(FilePath::MakeFileName(testdata_path_, FilePath("unique"),
-        1, "txt"));
-
-    remove(testdata_file_.c_str());
-    remove(unique_file0_.c_str());
-    remove(unique_file1_.c_str());
-    posix::RmDir(testdata_path_.c_str());
-  }
-
-  void TearDown() override {
-    remove(testdata_file_.c_str());
-    remove(unique_file0_.c_str());
-    remove(unique_file1_.c_str());
-    posix::RmDir(testdata_path_.c_str());
-  }
-
-  void CreateTextFile(const char* filename) {
-    FILE* f = posix::FOpen(filename, "w");
-    fprintf(f, "text\n");
-    fclose(f);
-  }
-
-  // Strings representing a directory and a file, with identical paths
-  // except for the trailing separator character that distinquishes
-  // a directory named 'test' from a file named 'test'. Example names:
-  FilePath testdata_path_;  // "/tmp/directory_creation/test/"
-  FilePath testdata_file_;  // "/tmp/directory_creation/test"
-  FilePath unique_file0_;  // "/tmp/directory_creation/test/unique.txt"
-  FilePath unique_file1_;  // "/tmp/directory_creation/test/unique_1.txt"
-};
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesRecursively) {
-  EXPECT_FALSE(testdata_path_.DirectoryExists()) << testdata_path_.string();
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-  EXPECT_TRUE(testdata_path_.DirectoryExists());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesForAlreadyExistingPath) {
-  EXPECT_FALSE(testdata_path_.DirectoryExists()) << testdata_path_.string();
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-  // Call 'create' again... should still succeed.
-  EXPECT_TRUE(testdata_path_.CreateDirectoriesRecursively());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesAndUniqueFilename) {
-  FilePath file_path(FilePath::GenerateUniqueFileName(testdata_path_,
-      FilePath("unique"), "txt"));
-  EXPECT_EQ(unique_file0_.string(), file_path.string());
-  EXPECT_FALSE(file_path.FileOrDirectoryExists());  // file not there
-
-  testdata_path_.CreateDirectoriesRecursively();
-  EXPECT_FALSE(file_path.FileOrDirectoryExists());  // file still not there
-  CreateTextFile(file_path.c_str());
-  EXPECT_TRUE(file_path.FileOrDirectoryExists());
-
-  FilePath file_path2(FilePath::GenerateUniqueFileName(testdata_path_,
-      FilePath("unique"), "txt"));
-  EXPECT_EQ(unique_file1_.string(), file_path2.string());
-  EXPECT_FALSE(file_path2.FileOrDirectoryExists());  // file not there
-  CreateTextFile(file_path2.c_str());
-  EXPECT_TRUE(file_path2.FileOrDirectoryExists());
-}
-
-TEST_F(DirectoryCreationTest, CreateDirectoriesFail) {
-  // force a failure by putting a file where we will try to create a directory.
-  CreateTextFile(testdata_file_.c_str());
-  EXPECT_TRUE(testdata_file_.FileOrDirectoryExists());
-  EXPECT_FALSE(testdata_file_.DirectoryExists());
-  EXPECT_FALSE(testdata_file_.CreateDirectoriesRecursively());
-}
-
-TEST(NoDirectoryCreationTest, CreateNoDirectoriesForDefaultXmlFile) {
-  const FilePath test_detail_xml("test_detail.xml");
-  EXPECT_FALSE(test_detail_xml.CreateDirectoriesRecursively());
-}
-
-TEST(FilePathTest, DefaultConstructor) {
-  FilePath fp;
-  EXPECT_EQ("", fp.string());
-}
-
-TEST(FilePathTest, CharAndCopyConstructors) {
-  const FilePath fp("spicy");
-  EXPECT_EQ("spicy", fp.string());
-
-  const FilePath fp_copy(fp);
-  EXPECT_EQ("spicy", fp_copy.string());
-}
-
-TEST(FilePathTest, StringConstructor) {
-  const FilePath fp(std::string("cider"));
-  EXPECT_EQ("cider", fp.string());
-}
-
-TEST(FilePathTest, Set) {
-  const FilePath apple("apple");
-  FilePath mac("mac");
-  mac.Set(apple);  // Implement Set() since overloading operator= is forbidden.
-  EXPECT_EQ("apple", mac.string());
-  EXPECT_EQ("apple", apple.string());
-}
-
-TEST(FilePathTest, ToString) {
-  const FilePath file("drink");
-  EXPECT_EQ("drink", file.string());
-}
-
-TEST(FilePathTest, RemoveExtension) {
-  EXPECT_EQ("app", FilePath("app.cc").RemoveExtension("cc").string());
-  EXPECT_EQ("app", FilePath("app.exe").RemoveExtension("exe").string());
-  EXPECT_EQ("APP", FilePath("APP.EXE").RemoveExtension("exe").string());
-}
-
-TEST(FilePathTest, RemoveExtensionWhenThereIsNoExtension) {
-  EXPECT_EQ("app", FilePath("app").RemoveExtension("exe").string());
-}
-
-TEST(FilePathTest, IsDirectory) {
-  EXPECT_FALSE(FilePath("cola").IsDirectory());
-  EXPECT_TRUE(FilePath("koala" GTEST_PATH_SEP_).IsDirectory());
-#if GTEST_HAS_ALT_PATH_SEP_
-  EXPECT_TRUE(FilePath("koala/").IsDirectory());
-#endif
-}
-
-TEST(FilePathTest, IsAbsolutePath) {
-  EXPECT_FALSE(FilePath("is" GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-  EXPECT_FALSE(FilePath("").IsAbsolutePath());
-#if GTEST_OS_WINDOWS
-  EXPECT_TRUE(FilePath("c:\\" GTEST_PATH_SEP_ "is_not"
-                       GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-  EXPECT_FALSE(FilePath("c:foo" GTEST_PATH_SEP_ "bar").IsAbsolutePath());
-  EXPECT_TRUE(FilePath("c:/" GTEST_PATH_SEP_ "is_not"
-                       GTEST_PATH_SEP_ "relative").IsAbsolutePath());
-#else
-  EXPECT_TRUE(FilePath(GTEST_PATH_SEP_ "is_not" GTEST_PATH_SEP_ "relative")
-              .IsAbsolutePath());
-#endif  // GTEST_OS_WINDOWS
-}
-
-TEST(FilePathTest, IsRootDirectory) {
-#if GTEST_OS_WINDOWS
-  EXPECT_TRUE(FilePath("a:\\").IsRootDirectory());
-  EXPECT_TRUE(FilePath("Z:/").IsRootDirectory());
-  EXPECT_TRUE(FilePath("e://").IsRootDirectory());
-  EXPECT_FALSE(FilePath("").IsRootDirectory());
-  EXPECT_FALSE(FilePath("b:").IsRootDirectory());
-  EXPECT_FALSE(FilePath("b:a").IsRootDirectory());
-  EXPECT_FALSE(FilePath("8:/").IsRootDirectory());
-  EXPECT_FALSE(FilePath("c|/").IsRootDirectory());
-#else
-  EXPECT_TRUE(FilePath("/").IsRootDirectory());
-  EXPECT_TRUE(FilePath("//").IsRootDirectory());
-  EXPECT_FALSE(FilePath("").IsRootDirectory());
-  EXPECT_FALSE(FilePath("\\").IsRootDirectory());
-  EXPECT_FALSE(FilePath("/x").IsRootDirectory());
-#endif
-}
-
-}  // namespace
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/test/googletest-filter-unittest.py b/3rdparty/gtest/test/googletest-filter-unittest.py
deleted file mode 100644
index 6b32f2d2..00000000
--- a/3rdparty/gtest/test/googletest-filter-unittest.py
+++ /dev/null
@@ -1,639 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2005 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test test filters.
-
-A user can specify which test(s) in a Google Test program to run via either
-the GTEST_FILTER environment variable or the --gtest_filter flag.
-This script tests such functionality by invoking
-googletest-filter-unittest_ (a program written with Google Test) with different
-environments and command line flags.
-
-Note that test sharding may also influence which tests are filtered. Therefore,
-we test that here also.
-"""
-
-import os
-import re
-try:
-  from sets import Set as set  # For Python 2.3 compatibility
-except ImportError:
-  pass
-import sys
-import gtest_test_utils
-
-# Constants.
-
-# Checks if this platform can pass empty environment variables to child
-# processes.  We set an env variable to an empty string and invoke a python
-# script in a subprocess to print whether the variable is STILL in
-# os.environ.  We then use 'eval' to parse the child's output so that an
-# exception is thrown if the input is anything other than 'True' nor 'False'.
-CAN_PASS_EMPTY_ENV = False
-if sys.executable:
-  os.environ['EMPTY_VAR'] = ''
-  child = gtest_test_utils.Subprocess(
-      [sys.executable, '-c', 'import os; print(\'EMPTY_VAR\' in os.environ)'])
-  CAN_PASS_EMPTY_ENV = eval(child.output)
-
-
-# Check if this platform can unset environment variables in child processes.
-# We set an env variable to a non-empty string, unset it, and invoke
-# a python script in a subprocess to print whether the variable
-# is NO LONGER in os.environ.
-# We use 'eval' to parse the child's output so that an exception
-# is thrown if the input is neither 'True' nor 'False'.
-CAN_UNSET_ENV = False
-if sys.executable:
-  os.environ['UNSET_VAR'] = 'X'
-  del os.environ['UNSET_VAR']
-  child = gtest_test_utils.Subprocess(
-      [sys.executable, '-c', 'import os; print(\'UNSET_VAR\' not in os.environ)'
-      ])
-  CAN_UNSET_ENV = eval(child.output)
-
-
-# Checks if we should test with an empty filter. This doesn't
-# make sense on platforms that cannot pass empty env variables (Win32)
-# and on platforms that cannot unset variables (since we cannot tell
-# the difference between "" and NULL -- Borland and Solaris < 5.10)
-CAN_TEST_EMPTY_FILTER = (CAN_PASS_EMPTY_ENV and CAN_UNSET_ENV)
-
-
-# The environment variable for specifying the test filters.
-FILTER_ENV_VAR = 'GTEST_FILTER'
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-SHARD_STATUS_FILE_ENV_VAR = 'GTEST_SHARD_STATUS_FILE'
-
-# The command line flag for specifying the test filters.
-FILTER_FLAG = 'gtest_filter'
-
-# The command line flag for including disabled tests.
-ALSO_RUN_DISABLED_TESTS_FLAG = 'gtest_also_run_disabled_tests'
-
-# Command to run the googletest-filter-unittest_ program.
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-filter-unittest_')
-
-# Regex for determining whether parameterized tests are enabled in the binary.
-PARAM_TEST_REGEX = re.compile(r'/ParamTest')
-
-# Regex for parsing test case names from Google Test's output.
-TEST_CASE_REGEX = re.compile(r'^\[\-+\] \d+ tests? from (\w+(/\w+)?)')
-
-# Regex for parsing test names from Google Test's output.
-TEST_REGEX = re.compile(r'^\[\s*RUN\s*\].*\.(\w+(/\w+)?)')
-
-# The command line flag to tell Google Test to output the list of tests it
-# will run.
-LIST_TESTS_FLAG = '--gtest_list_tests'
-
-# Indicates whether Google Test supports death tests.
-SUPPORTS_DEATH_TESTS = 'HasDeathTest' in gtest_test_utils.Subprocess(
-    [COMMAND, LIST_TESTS_FLAG]).output
-
-# Full names of all tests in googletest-filter-unittests_.
-PARAM_TESTS = [
-    'SeqP/ParamTest.TestX/0',
-    'SeqP/ParamTest.TestX/1',
-    'SeqP/ParamTest.TestY/0',
-    'SeqP/ParamTest.TestY/1',
-    'SeqQ/ParamTest.TestX/0',
-    'SeqQ/ParamTest.TestX/1',
-    'SeqQ/ParamTest.TestY/0',
-    'SeqQ/ParamTest.TestY/1',
-    ]
-
-DISABLED_TESTS = [
-    'BarTest.DISABLED_TestFour',
-    'BarTest.DISABLED_TestFive',
-    'BazTest.DISABLED_TestC',
-    'DISABLED_FoobarTest.Test1',
-    'DISABLED_FoobarTest.DISABLED_Test2',
-    'DISABLED_FoobarbazTest.TestA',
-    ]
-
-if SUPPORTS_DEATH_TESTS:
-  DEATH_TESTS = [
-    'HasDeathTest.Test1',
-    'HasDeathTest.Test2',
-    ]
-else:
-  DEATH_TESTS = []
-
-# All the non-disabled tests.
-ACTIVE_TESTS = [
-    'FooTest.Abc',
-    'FooTest.Xyz',
-
-    'BarTest.TestOne',
-    'BarTest.TestTwo',
-    'BarTest.TestThree',
-
-    'BazTest.TestOne',
-    'BazTest.TestA',
-    'BazTest.TestB',
-    ] + DEATH_TESTS + PARAM_TESTS
-
-param_tests_present = None
-
-# Utilities.
-
-environ = os.environ.copy()
-
-
-def SetEnvVar(env_var, value):
-  """Sets the env variable to 'value'; unsets it when 'value' is None."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-def RunAndReturnOutput(args = None):
-  """Runs the test program and returns its output."""
-
-  return gtest_test_utils.Subprocess([COMMAND] + (args or []),
-                                     env=environ).output
-
-
-def RunAndExtractTestList(args = None):
-  """Runs the test program and returns its exit code and a list of tests run."""
-
-  p = gtest_test_utils.Subprocess([COMMAND] + (args or []), env=environ)
-  tests_run = []
-  test_case = ''
-  test = ''
-  for line in p.output.split('\n'):
-    match = TEST_CASE_REGEX.match(line)
-    if match is not None:
-      test_case = match.group(1)
-    else:
-      match = TEST_REGEX.match(line)
-      if match is not None:
-        test = match.group(1)
-        tests_run.append(test_case + '.' + test)
-  return (tests_run, p.exit_code)
-
-
-def InvokeWithModifiedEnv(extra_env, function, *args, **kwargs):
-  """Runs the given function and arguments in a modified environment."""
-  try:
-    original_env = environ.copy()
-    environ.update(extra_env)
-    return function(*args, **kwargs)
-  finally:
-    environ.clear()
-    environ.update(original_env)
-
-
-def RunWithSharding(total_shards, shard_index, command):
-  """Runs a test program shard and returns exit code and a list of tests run."""
-
-  extra_env = {SHARD_INDEX_ENV_VAR: str(shard_index),
-               TOTAL_SHARDS_ENV_VAR: str(total_shards)}
-  return InvokeWithModifiedEnv(extra_env, RunAndExtractTestList, command)
-
-# The unit test.
-
-
-class GTestFilterUnitTest(gtest_test_utils.TestCase):
-  """Tests the env variable or the command line flag to filter tests."""
-
-  # Utilities.
-
-  def AssertSetEqual(self, lhs, rhs):
-    """Asserts that two sets are equal."""
-
-    for elem in lhs:
-      self.assert_(elem in rhs, '%s in %s' % (elem, rhs))
-
-    for elem in rhs:
-      self.assert_(elem in lhs, '%s in %s' % (elem, lhs))
-
-  def AssertPartitionIsValid(self, set_var, list_of_sets):
-    """Asserts that list_of_sets is a valid partition of set_var."""
-
-    full_partition = []
-    for slice_var in list_of_sets:
-      full_partition.extend(slice_var)
-    self.assertEqual(len(set_var), len(full_partition))
-    self.assertEqual(set(set_var), set(full_partition))
-
-  def AdjustForParameterizedTests(self, tests_to_run):
-    """Adjust tests_to_run in case value parameterized tests are disabled."""
-
-    global param_tests_present
-    if not param_tests_present:
-      return list(set(tests_to_run) - set(PARAM_TESTS))
-    else:
-      return tests_to_run
-
-  def RunAndVerify(self, gtest_filter, tests_to_run):
-    """Checks that the binary runs correct set of tests for a given filter."""
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # First, tests using the environment variable.
-
-    # Windows removes empty variables from the environment when passing it
-    # to a new process.  This means it is impossible to pass an empty filter
-    # into a process using the environment variable.  However, we can still
-    # test the case when the variable is not supplied (i.e., gtest_filter is
-    # None).
-    # pylint: disable-msg=C6403
-    if CAN_TEST_EMPTY_FILTER or gtest_filter != '':
-      SetEnvVar(FILTER_ENV_VAR, gtest_filter)
-      tests_run = RunAndExtractTestList()[0]
-      SetEnvVar(FILTER_ENV_VAR, None)
-      self.AssertSetEqual(tests_run, tests_to_run)
-    # pylint: enable-msg=C6403
-
-    # Next, tests using the command line flag.
-
-    if gtest_filter is None:
-      args = []
-    else:
-      args = ['--%s=%s' % (FILTER_FLAG, gtest_filter)]
-
-    tests_run = RunAndExtractTestList(args)[0]
-    self.AssertSetEqual(tests_run, tests_to_run)
-
-  def RunAndVerifyWithSharding(self, gtest_filter, total_shards, tests_to_run,
-                               args=None, check_exit_0=False):
-    """Checks that binary runs correct tests for the given filter and shard.
-
-    Runs all shards of googletest-filter-unittest_ with the given filter, and
-    verifies that the right set of tests were run. The union of tests run
-    on each shard should be identical to tests_to_run, without duplicates.
-    If check_exit_0, .
-
-    Args:
-      gtest_filter: A filter to apply to the tests.
-      total_shards: A total number of shards to split test run into.
-      tests_to_run: A set of tests expected to run.
-      args   :      Arguments to pass to the to the test binary.
-      check_exit_0: When set to a true value, make sure that all shards
-                    return 0.
-    """
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # Windows removes empty variables from the environment when passing it
-    # to a new process.  This means it is impossible to pass an empty filter
-    # into a process using the environment variable.  However, we can still
-    # test the case when the variable is not supplied (i.e., gtest_filter is
-    # None).
-    # pylint: disable-msg=C6403
-    if CAN_TEST_EMPTY_FILTER or gtest_filter != '':
-      SetEnvVar(FILTER_ENV_VAR, gtest_filter)
-      partition = []
-      for i in range(0, total_shards):
-        (tests_run, exit_code) = RunWithSharding(total_shards, i, args)
-        if check_exit_0:
-          self.assertEqual(0, exit_code)
-        partition.append(tests_run)
-
-      self.AssertPartitionIsValid(tests_to_run, partition)
-      SetEnvVar(FILTER_ENV_VAR, None)
-    # pylint: enable-msg=C6403
-
-  def RunAndVerifyAllowingDisabled(self, gtest_filter, tests_to_run):
-    """Checks that the binary runs correct set of tests for the given filter.
-
-    Runs googletest-filter-unittest_ with the given filter, and enables
-    disabled tests. Verifies that the right set of tests were run.
-
-    Args:
-      gtest_filter: A filter to apply to the tests.
-      tests_to_run: A set of tests expected to run.
-    """
-
-    tests_to_run = self.AdjustForParameterizedTests(tests_to_run)
-
-    # Construct the command line.
-    args = ['--%s' % ALSO_RUN_DISABLED_TESTS_FLAG]
-    if gtest_filter is not None:
-      args.append('--%s=%s' % (FILTER_FLAG, gtest_filter))
-
-    tests_run = RunAndExtractTestList(args)[0]
-    self.AssertSetEqual(tests_run, tests_to_run)
-
-  def setUp(self):
-    """Sets up test case.
-
-    Determines whether value-parameterized tests are enabled in the binary and
-    sets the flags accordingly.
-    """
-
-    global param_tests_present
-    if param_tests_present is None:
-      param_tests_present = PARAM_TEST_REGEX.search(
-          RunAndReturnOutput()) is not None
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of not specifying the filter."""
-
-    self.RunAndVerify(None, ACTIVE_TESTS)
-
-  def testDefaultBehaviorWithShards(self):
-    """Tests the behavior without the filter, with sharding enabled."""
-
-    self.RunAndVerifyWithSharding(None, 1, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, 2, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS) - 1, ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS), ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding(None, len(ACTIVE_TESTS) + 1, ACTIVE_TESTS)
-
-  def testEmptyFilter(self):
-    """Tests an empty filter."""
-
-    self.RunAndVerify('', [])
-    self.RunAndVerifyWithSharding('', 1, [])
-    self.RunAndVerifyWithSharding('', 2, [])
-
-  def testBadFilter(self):
-    """Tests a filter that matches nothing."""
-
-    self.RunAndVerify('BadFilter', [])
-    self.RunAndVerifyAllowingDisabled('BadFilter', [])
-
-  def testFullName(self):
-    """Tests filtering by full name."""
-
-    self.RunAndVerify('FooTest.Xyz', ['FooTest.Xyz'])
-    self.RunAndVerifyAllowingDisabled('FooTest.Xyz', ['FooTest.Xyz'])
-    self.RunAndVerifyWithSharding('FooTest.Xyz', 5, ['FooTest.Xyz'])
-
-  def testUniversalFilters(self):
-    """Tests filters that match everything."""
-
-    self.RunAndVerify('*', ACTIVE_TESTS)
-    self.RunAndVerify('*.*', ACTIVE_TESTS)
-    self.RunAndVerifyWithSharding('*.*', len(ACTIVE_TESTS) - 3, ACTIVE_TESTS)
-    self.RunAndVerifyAllowingDisabled('*', ACTIVE_TESTS + DISABLED_TESTS)
-    self.RunAndVerifyAllowingDisabled('*.*', ACTIVE_TESTS + DISABLED_TESTS)
-
-  def testFilterByTestCase(self):
-    """Tests filtering by test case name."""
-
-    self.RunAndVerify('FooTest.*', ['FooTest.Abc', 'FooTest.Xyz'])
-
-    BAZ_TESTS = ['BazTest.TestOne', 'BazTest.TestA', 'BazTest.TestB']
-    self.RunAndVerify('BazTest.*', BAZ_TESTS)
-    self.RunAndVerifyAllowingDisabled('BazTest.*',
-                                      BAZ_TESTS + ['BazTest.DISABLED_TestC'])
-
-  def testFilterByTest(self):
-    """Tests filtering by test name."""
-
-    self.RunAndVerify('*.TestOne', ['BarTest.TestOne', 'BazTest.TestOne'])
-
-  def testFilterDisabledTests(self):
-    """Select only the disabled tests to run."""
-
-    self.RunAndVerify('DISABLED_FoobarTest.Test1', [])
-    self.RunAndVerifyAllowingDisabled('DISABLED_FoobarTest.Test1',
-                                      ['DISABLED_FoobarTest.Test1'])
-
-    self.RunAndVerify('*DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('*DISABLED_*', DISABLED_TESTS)
-
-    self.RunAndVerify('*.DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('*.DISABLED_*', [
-        'BarTest.DISABLED_TestFour',
-        'BarTest.DISABLED_TestFive',
-        'BazTest.DISABLED_TestC',
-        'DISABLED_FoobarTest.DISABLED_Test2',
-        ])
-
-    self.RunAndVerify('DISABLED_*', [])
-    self.RunAndVerifyAllowingDisabled('DISABLED_*', [
-        'DISABLED_FoobarTest.Test1',
-        'DISABLED_FoobarTest.DISABLED_Test2',
-        'DISABLED_FoobarbazTest.TestA',
-        ])
-
-  def testWildcardInTestCaseName(self):
-    """Tests using wildcard in the test case name."""
-
-    self.RunAndVerify('*a*.*', [
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        'BazTest.TestB', ] + DEATH_TESTS + PARAM_TESTS)
-
-  def testWildcardInTestName(self):
-    """Tests using wildcard in the test name."""
-
-    self.RunAndVerify('*.*A*', ['FooTest.Abc', 'BazTest.TestA'])
-
-  def testFilterWithoutDot(self):
-    """Tests a filter that has no '.' in it."""
-
-    self.RunAndVerify('*z*', [
-        'FooTest.Xyz',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        'BazTest.TestB',
-        ])
-
-  def testTwoPatterns(self):
-    """Tests filters that consist of two patterns."""
-
-    self.RunAndVerify('Foo*.*:*A*', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BazTest.TestA',
-        ])
-
-    # An empty pattern + a non-empty one
-    self.RunAndVerify(':*A*', ['FooTest.Abc', 'BazTest.TestA'])
-
-  def testThreePatterns(self):
-    """Tests filters that consist of three patterns."""
-
-    self.RunAndVerify('*oo*:*A*:*One', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-
-        'BazTest.TestOne',
-        'BazTest.TestA',
-        ])
-
-    # The 2nd pattern is empty.
-    self.RunAndVerify('*oo*::*One', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-
-        'BazTest.TestOne',
-        ])
-
-    # The last 2 patterns are empty.
-    self.RunAndVerify('*oo*::', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-        ])
-
-  def testNegativeFilters(self):
-    self.RunAndVerify('*-BazTest.TestOne', [
-        'FooTest.Abc',
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-
-        'BazTest.TestA',
-        'BazTest.TestB',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    self.RunAndVerify('*-FooTest.Abc:BazTest.*', [
-        'FooTest.Xyz',
-
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    self.RunAndVerify('BarTest.*-BarTest.TestOne', [
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ])
-
-    # Tests without leading '*'.
-    self.RunAndVerify('-FooTest.Abc:FooTest.Xyz:BazTest.*', [
-        'BarTest.TestOne',
-        'BarTest.TestTwo',
-        'BarTest.TestThree',
-        ] + DEATH_TESTS + PARAM_TESTS)
-
-    # Value parameterized tests.
-    self.RunAndVerify('*/*', PARAM_TESTS)
-
-    # Value parameterized tests filtering by the sequence name.
-    self.RunAndVerify('SeqP/*', [
-        'SeqP/ParamTest.TestX/0',
-        'SeqP/ParamTest.TestX/1',
-        'SeqP/ParamTest.TestY/0',
-        'SeqP/ParamTest.TestY/1',
-        ])
-
-    # Value parameterized tests filtering by the test name.
-    self.RunAndVerify('*/0', [
-        'SeqP/ParamTest.TestX/0',
-        'SeqP/ParamTest.TestY/0',
-        'SeqQ/ParamTest.TestX/0',
-        'SeqQ/ParamTest.TestY/0',
-        ])
-
-  def testFlagOverridesEnvVar(self):
-    """Tests that the filter flag overrides the filtering env. variable."""
-
-    SetEnvVar(FILTER_ENV_VAR, 'Foo*')
-    args = ['--%s=%s' % (FILTER_FLAG, '*One')]
-    tests_run = RunAndExtractTestList(args)[0]
-    SetEnvVar(FILTER_ENV_VAR, None)
-
-    self.AssertSetEqual(tests_run, ['BarTest.TestOne', 'BazTest.TestOne'])
-
-  def testShardStatusFileIsCreated(self):
-    """Tests that the shard file is created if specified in the environment."""
-
-    shard_status_file = os.path.join(gtest_test_utils.GetTempDir(),
-                                     'shard_status_file')
-    self.assert_(not os.path.exists(shard_status_file))
-
-    extra_env = {SHARD_STATUS_FILE_ENV_VAR: shard_status_file}
-    try:
-      InvokeWithModifiedEnv(extra_env, RunAndReturnOutput)
-    finally:
-      self.assert_(os.path.exists(shard_status_file))
-      os.remove(shard_status_file)
-
-  def testShardStatusFileIsCreatedWithListTests(self):
-    """Tests that the shard file is created with the "list_tests" flag."""
-
-    shard_status_file = os.path.join(gtest_test_utils.GetTempDir(),
-                                     'shard_status_file2')
-    self.assert_(not os.path.exists(shard_status_file))
-
-    extra_env = {SHARD_STATUS_FILE_ENV_VAR: shard_status_file}
-    try:
-      output = InvokeWithModifiedEnv(extra_env,
-                                     RunAndReturnOutput,
-                                     [LIST_TESTS_FLAG])
-    finally:
-      # This assertion ensures that Google Test enumerated the tests as
-      # opposed to running them.
-      self.assert_('[==========]' not in output,
-                   'Unexpected output during test enumeration.\n'
-                   'Please ensure that LIST_TESTS_FLAG is assigned the\n'
-                   'correct flag value for listing Google Test tests.')
-
-      self.assert_(os.path.exists(shard_status_file))
-      os.remove(shard_status_file)
-
-  if SUPPORTS_DEATH_TESTS:
-    def testShardingWorksWithDeathTests(self):
-      """Tests integration with death tests and sharding."""
-
-      gtest_filter = 'HasDeathTest.*:SeqP/*'
-      expected_tests = [
-          'HasDeathTest.Test1',
-          'HasDeathTest.Test2',
-
-          'SeqP/ParamTest.TestX/0',
-          'SeqP/ParamTest.TestX/1',
-          'SeqP/ParamTest.TestY/0',
-          'SeqP/ParamTest.TestY/1',
-          ]
-
-      for flag in ['--gtest_death_test_style=threadsafe',
-                   '--gtest_death_test_style=fast']:
-        self.RunAndVerifyWithSharding(gtest_filter, 3, expected_tests,
-                                      check_exit_0=True, args=[flag])
-        self.RunAndVerifyWithSharding(gtest_filter, 5, expected_tests,
-                                      check_exit_0=True, args=[flag])
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-filter-unittest_.cc b/3rdparty/gtest/test/googletest-filter-unittest_.cc
deleted file mode 100644
index d30ec9c7..00000000
--- a/3rdparty/gtest/test/googletest-filter-unittest_.cc
+++ /dev/null
@@ -1,137 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test test filters.
-//
-// A user can specify which test(s) in a Google Test program to run via
-// either the GTEST_FILTER environment variable or the --gtest_filter
-// flag.  This is used for testing such functionality.
-//
-// The program will be invoked from a Python unit test.  Don't run it
-// directly.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-// Test case FooTest.
-
-class FooTest : public testing::Test {
-};
-
-TEST_F(FooTest, Abc) {
-}
-
-TEST_F(FooTest, Xyz) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case BarTest.
-
-TEST(BarTest, TestOne) {
-}
-
-TEST(BarTest, TestTwo) {
-}
-
-TEST(BarTest, TestThree) {
-}
-
-TEST(BarTest, DISABLED_TestFour) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(BarTest, DISABLED_TestFive) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case BazTest.
-
-TEST(BazTest, TestOne) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(BazTest, TestA) {
-}
-
-TEST(BazTest, TestB) {
-}
-
-TEST(BazTest, DISABLED_TestC) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case HasDeathTest
-
-TEST(HasDeathTest, Test1) {
-  EXPECT_DEATH_IF_SUPPORTED(exit(1), ".*");
-}
-
-// We need at least two death tests to make sure that the all death tests
-// aren't on the first shard.
-TEST(HasDeathTest, Test2) {
-  EXPECT_DEATH_IF_SUPPORTED(exit(1), ".*");
-}
-
-// Test case FoobarTest
-
-TEST(DISABLED_FoobarTest, Test1) {
-  FAIL() << "Expected failure.";
-}
-
-TEST(DISABLED_FoobarTest, DISABLED_Test2) {
-  FAIL() << "Expected failure.";
-}
-
-// Test case FoobarbazTest
-
-TEST(DISABLED_FoobarbazTest, TestA) {
-  FAIL() << "Expected failure.";
-}
-
-class ParamTest : public testing::TestWithParam<int> {
-};
-
-TEST_P(ParamTest, TestX) {
-}
-
-TEST_P(ParamTest, TestY) {
-}
-
-INSTANTIATE_TEST_SUITE_P(SeqP, ParamTest, testing::Values(1, 2));
-INSTANTIATE_TEST_SUITE_P(SeqQ, ParamTest, testing::Values(5, 6));
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-json-outfiles-test.py b/3rdparty/gtest/test/googletest-json-outfiles-test.py
deleted file mode 100644
index 8ef47b8f..00000000
--- a/3rdparty/gtest/test/googletest-json-outfiles-test.py
+++ /dev/null
@@ -1,191 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_json_output module."""
-
-import json
-import os
-import gtest_json_test_utils
-import gtest_test_utils
-
-GTEST_OUTPUT_SUBDIR = 'json_outfiles'
-GTEST_OUTPUT_1_TEST = 'gtest_xml_outfile1_test_'
-GTEST_OUTPUT_2_TEST = 'gtest_xml_outfile2_test_'
-
-EXPECTED_1 = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'PropertyOne',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'TestSomeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyOne',
-            u'SetUpProp': u'1',
-            u'TestSomeProperty': u'1',
-            u'TearDownProp': u'1',
-        }],
-    }],
-}
-
-EXPECTED_2 = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'PropertyTwo',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'TestSomeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'timestamp': u'*',
-            u'time': u'*',
-            u'classname': u'PropertyTwo',
-            u'SetUpProp': u'2',
-            u'TestSomeProperty': u'2',
-            u'TearDownProp': u'2',
-        }],
-    }],
-}
-
-
-class GTestJsonOutFilesTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's JSON output functionality."""
-
-  def setUp(self):
-    # We want the trailing '/' that the last "" provides in os.path.join, for
-    # telling Google Test to create an output directory instead of a single file
-    # for xml output.
-    self.output_dir_ = os.path.join(gtest_test_utils.GetTempDir(),
-                                    GTEST_OUTPUT_SUBDIR, '')
-    self.DeleteFilesAndDir()
-
-  def tearDown(self):
-    self.DeleteFilesAndDir()
-
-  def DeleteFilesAndDir(self):
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_1_TEST + '.json'))
-    except os.error:
-      pass
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_2_TEST + '.json'))
-    except os.error:
-      pass
-    try:
-      os.rmdir(self.output_dir_)
-    except os.error:
-      pass
-
-  def testOutfile1(self):
-    self._TestOutFile(GTEST_OUTPUT_1_TEST, EXPECTED_1)
-
-  def testOutfile2(self):
-    self._TestOutFile(GTEST_OUTPUT_2_TEST, EXPECTED_2)
-
-  def _TestOutFile(self, test_name, expected):
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(test_name)
-    command = [gtest_prog_path, '--gtest_output=json:%s' % self.output_dir_]
-    p = gtest_test_utils.Subprocess(command,
-                                    working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-
-    output_file_name1 = test_name + '.json'
-    output_file1 = os.path.join(self.output_dir_, output_file_name1)
-    output_file_name2 = 'lt-' + output_file_name1
-    output_file2 = os.path.join(self.output_dir_, output_file_name2)
-    self.assert_(os.path.isfile(output_file1) or os.path.isfile(output_file2),
-                 output_file1)
-
-    if os.path.isfile(output_file1):
-      with open(output_file1) as f:
-        actual = json.load(f)
-    else:
-      with open(output_file2) as f:
-        actual = json.load(f)
-    self.assertEqual(expected, gtest_json_test_utils.normalize(actual))
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '0'
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-json-output-unittest.py b/3rdparty/gtest/test/googletest-json-output-unittest.py
deleted file mode 100644
index 15861f75..00000000
--- a/3rdparty/gtest/test/googletest-json-output-unittest.py
+++ /dev/null
@@ -1,778 +0,0 @@
-#!/usr/bin/env python
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_json_output module."""
-
-import datetime
-import errno
-import json
-import os
-import re
-import sys
-
-import gtest_json_test_utils
-import gtest_test_utils
-
-GTEST_FILTER_FLAG = '--gtest_filter'
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.json'
-GTEST_PROGRAM_NAME = 'gtest_xml_output_unittest_'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-if SUPPORTS_STACK_TRACES:
-  STACK_TRACE_TEMPLATE = '\nStack trace:\n*'
-else:
-  STACK_TRACE_TEMPLATE = ''
-
-EXPECTED_NON_EMPTY = {
-    u'tests':
-        24,
-    u'failures':
-        4,
-    u'disabled':
-        2,
-    u'errors':
-        0,
-    u'timestamp':
-        u'*',
-    u'time':
-        u'*',
-    u'ad_hoc_property':
-        u'42',
-    u'name':
-        u'AllTests',
-    u'testsuites': [{
-        u'name':
-            u'SuccessfulTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SuccessfulTest'
-        }]
-    }, {
-        u'name':
-            u'FailedTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'Fails',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'FailedTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  1\n  2' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'DisabledTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            1,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'DISABLED_test_not_run',
-            u'status': u'NOTRUN',
-            u'result': u'SUPPRESSED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'DisabledTest'
-        }]
-    }, {
-        u'name':
-            u'SkippedTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Skipped',
-            u'status': u'RUN',
-            u'result': u'SKIPPED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SkippedTest'
-        }]
-    }, {
-        u'name':
-            u'MixedResultTest',
-        u'tests':
-            3,
-        u'failures':
-            1,
-        u'disabled':
-            1,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'MixedResultTest'
-        }, {
-            u'name':
-                u'Fails',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'MixedResultTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  1\n  2' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }, {
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Expected equality of these values:\n'
-                            u'  2\n  3' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }, {
-            u'name': u'DISABLED_test',
-            u'status': u'NOTRUN',
-            u'result': u'SUPPRESSED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'MixedResultTest'
-        }]
-    }, {
-        u'name':
-            u'XmlQuotingTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'OutputsCData',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'XmlQuotingTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Failed\nXML output: <?xml encoding="utf-8">'
-                            u'<top><![CDATA[cdata text]]></top>' +
-                            STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'InvalidCharactersTest',
-        u'tests':
-            1,
-        u'failures':
-            1,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name':
-                u'InvalidCharactersInMessage',
-            u'status':
-                u'RUN',
-            u'result':
-                u'COMPLETED',
-            u'time':
-                u'*',
-            u'timestamp':
-                u'*',
-            u'classname':
-                u'InvalidCharactersTest',
-            u'failures': [{
-                u'failure': u'gtest_xml_output_unittest_.cc:*\n'
-                            u'Failed\nInvalid characters in brackets'
-                            u' [\x01\x02]' + STACK_TRACE_TEMPLATE,
-                u'type': u''
-            }]
-        }]
-    }, {
-        u'name':
-            u'PropertyRecordingTest',
-        u'tests':
-            4,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'SetUpTestSuite':
-            u'yes',
-        u'TearDownTestSuite':
-            u'aye',
-        u'testsuite': [{
-            u'name': u'OneProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'1'
-        }, {
-            u'name': u'IntValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_int': u'1'
-        }, {
-            u'name': u'ThreeProperties',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'1',
-            u'key_2': u'2',
-            u'key_3': u'3'
-        }, {
-            u'name': u'TwoValuesForOneKeyUsesLastValue',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'PropertyRecordingTest',
-            u'key_1': u'2'
-        }]
-    }, {
-        u'name':
-            u'NoFixtureTest',
-        u'tests':
-            3,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'RecordProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key': u'1'
-        }, {
-            u'name': u'ExternalUtilityThatCallsRecordIntValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key_for_utility_int': u'1'
-        }, {
-            u'name': u'ExternalUtilityThatCallsRecordStringValuedProperty',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'NoFixtureTest',
-            u'key_for_utility_string': u'1'
-        }]
-    }, {
-        u'name':
-            u'TypedTest/0',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'int',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'TypedTest/0'
-        }]
-    }, {
-        u'name':
-            u'TypedTest/1',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'long',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'TypedTest/1'
-        }]
-    }, {
-        u'name':
-            u'Single/TypeParameterizedTestSuite/0',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'int',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/TypeParameterizedTestSuite/0'
-        }]
-    }, {
-        u'name':
-            u'Single/TypeParameterizedTestSuite/1',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasTypeParamAttribute',
-            u'type_param': u'long',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/TypeParameterizedTestSuite/1'
-        }]
-    }, {
-        u'name':
-            u'Single/ValueParamTest',
-        u'tests':
-            4,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'HasValueParamAttribute/0',
-            u'value_param': u'33',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'HasValueParamAttribute/1',
-            u'value_param': u'42',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'AnotherTestThatHasValueParamAttribute/0',
-            u'value_param': u'33',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }, {
-            u'name': u'AnotherTestThatHasValueParamAttribute/1',
-            u'value_param': u'42',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'Single/ValueParamTest'
-        }]
-    }]
-}
-
-EXPECTED_FILTERED = {
-    u'tests':
-        1,
-    u'failures':
-        0,
-    u'disabled':
-        0,
-    u'errors':
-        0,
-    u'time':
-        u'*',
-    u'timestamp':
-        u'*',
-    u'name':
-        u'AllTests',
-    u'ad_hoc_property':
-        u'42',
-    u'testsuites': [{
-        u'name':
-            u'SuccessfulTest',
-        u'tests':
-            1,
-        u'failures':
-            0,
-        u'disabled':
-            0,
-        u'errors':
-            0,
-        u'time':
-            u'*',
-        u'timestamp':
-            u'*',
-        u'testsuite': [{
-            u'name': u'Succeeds',
-            u'status': u'RUN',
-            u'result': u'COMPLETED',
-            u'time': u'*',
-            u'timestamp': u'*',
-            u'classname': u'SuccessfulTest',
-        }]
-    }],
-}
-
-EXPECTED_EMPTY = {
-    u'tests': 0,
-    u'failures': 0,
-    u'disabled': 0,
-    u'errors': 0,
-    u'time': u'*',
-    u'timestamp': u'*',
-    u'name': u'AllTests',
-    u'testsuites': [],
-}
-
-GTEST_PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath(GTEST_PROGRAM_NAME)
-
-SUPPORTS_TYPED_TESTS = 'TypedTest' in gtest_test_utils.Subprocess(
-    [GTEST_PROGRAM_PATH, GTEST_LIST_TESTS_FLAG], capture_stderr=False).output
-
-
-class GTestJsonOutputUnitTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's JSON output functionality.
-  """
-
-  # This test currently breaks on platforms that do not support typed and
-  # type-parameterized tests, so we don't run it under them.
-  if SUPPORTS_TYPED_TESTS:
-
-    def testNonEmptyJsonOutput(self):
-      """Verifies JSON output for a Google Test binary with non-empty output.
-
-      Runs a test program that generates a non-empty JSON output, and
-      tests that the JSON output is expected.
-      """
-      self._TestJsonOutput(GTEST_PROGRAM_NAME, EXPECTED_NON_EMPTY, 1)
-
-  def testEmptyJsonOutput(self):
-    """Verifies JSON output for a Google Test binary without actual tests.
-
-    Runs a test program that generates an empty JSON output, and
-    tests that the JSON output is expected.
-    """
-
-    self._TestJsonOutput('gtest_no_test_unittest', EXPECTED_EMPTY, 0)
-
-  def testTimestampValue(self):
-    """Checks whether the timestamp attribute in the JSON output is valid.
-
-    Runs a test program that generates an empty JSON output, and checks if
-    the timestamp attribute in the testsuites tag is valid.
-    """
-    actual = self._GetJsonOutput('gtest_no_test_unittest', [], 0)
-    date_time_str = actual['timestamp']
-    # datetime.strptime() is only available in Python 2.5+ so we have to
-    # parse the expected datetime manually.
-    match = re.match(r'(\d+)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)', date_time_str)
-    self.assertTrue(
-        re.match,
-        'JSON datettime string %s has incorrect format' % date_time_str)
-    date_time_from_json = datetime.datetime(
-        year=int(match.group(1)), month=int(match.group(2)),
-        day=int(match.group(3)), hour=int(match.group(4)),
-        minute=int(match.group(5)), second=int(match.group(6)))
-
-    time_delta = abs(datetime.datetime.now() - date_time_from_json)
-    # timestamp value should be near the current local time
-    self.assertTrue(time_delta < datetime.timedelta(seconds=600),
-                    'time_delta is %s' % time_delta)
-
-  def testDefaultOutputFile(self):
-    """Verifies the default output file name.
-
-    Confirms that Google Test produces an JSON output file with the expected
-    default name if no name is explicitly specified.
-    """
-    output_file = os.path.join(gtest_test_utils.GetTempDir(),
-                               GTEST_DEFAULT_OUTPUT_FILE)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_no_test_unittest')
-    try:
-      os.remove(output_file)
-    except OSError:
-      e = sys.exc_info()[1]
-      if e.errno != errno.ENOENT:
-        raise
-
-    p = gtest_test_utils.Subprocess(
-        [gtest_prog_path, '%s=json' % GTEST_OUTPUT_FLAG],
-        working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-    self.assert_(os.path.isfile(output_file))
-
-  def testSuppressedJsonOutput(self):
-    """Verifies that no JSON output is generated.
-
-    Tests that no JSON file is generated if the default JSON listener is
-    shut down before RUN_ALL_TESTS is invoked.
-    """
-
-    json_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             GTEST_PROGRAM_NAME + 'out.json')
-    if os.path.isfile(json_path):
-      os.remove(json_path)
-
-    command = [GTEST_PROGRAM_PATH,
-               '%s=json:%s' % (GTEST_OUTPUT_FLAG, json_path),
-               '--shut_down_xml']
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      # p.signal is available only if p.terminated_by_signal is True.
-      self.assertFalse(
-          p.terminated_by_signal,
-          '%s was killed by signal %d' % (GTEST_PROGRAM_NAME, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(1, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, 1))
-
-    self.assert_(not os.path.isfile(json_path))
-
-  def testFilteredTestJsonOutput(self):
-    """Verifies JSON output when a filter is applied.
-
-    Runs a test program that executes only some tests and verifies that
-    non-selected tests do not show up in the JSON output.
-    """
-
-    self._TestJsonOutput(GTEST_PROGRAM_NAME, EXPECTED_FILTERED, 0,
-                         extra_args=['%s=SuccessfulTest.*' % GTEST_FILTER_FLAG])
-
-  def _GetJsonOutput(self, gtest_prog_name, extra_args, expected_exit_code):
-    """Returns the JSON output generated by running the program gtest_prog_name.
-
-    Furthermore, the program's exit code must be expected_exit_code.
-
-    Args:
-      gtest_prog_name: Google Test binary name.
-      extra_args: extra arguments to binary invocation.
-      expected_exit_code: program's exit code.
-    """
-    json_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             gtest_prog_name + 'out.json')
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(gtest_prog_name)
-
-    command = (
-        [gtest_prog_path, '%s=json:%s' % (GTEST_OUTPUT_FLAG, json_path)] +
-        extra_args
-    )
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      self.assert_(False,
-                   '%s was killed by signal %d' % (gtest_prog_name, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(expected_exit_code, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, expected_exit_code))
-    with open(json_path) as f:
-      actual = json.load(f)
-    return actual
-
-  def _TestJsonOutput(self, gtest_prog_name, expected,
-                      expected_exit_code, extra_args=None):
-    """Checks the JSON output generated by the Google Test binary.
-
-    Asserts that the JSON document generated by running the program
-    gtest_prog_name matches expected_json, a string containing another
-    JSON document.  Furthermore, the program's exit code must be
-    expected_exit_code.
-
-    Args:
-      gtest_prog_name: Google Test binary name.
-      expected: expected output.
-      expected_exit_code: program's exit code.
-      extra_args: extra arguments to binary invocation.
-    """
-
-    actual = self._GetJsonOutput(gtest_prog_name, extra_args or [],
-                                 expected_exit_code)
-    self.assertEqual(expected, gtest_json_test_utils.normalize(actual))
-
-
-if __name__ == '__main__':
-  if NO_STACKTRACE_SUPPORT_FLAG in sys.argv:
-    # unittest.main() can't handle unknown flags
-    sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-list-tests-unittest.py b/3rdparty/gtest/test/googletest-list-tests-unittest.py
deleted file mode 100644
index 81423a33..00000000
--- a/3rdparty/gtest/test/googletest-list-tests-unittest.py
+++ /dev/null
@@ -1,205 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for Google Test's --gtest_list_tests flag.
-
-A user can ask Google Test to list all tests by specifying the
---gtest_list_tests flag.  This script tests such functionality
-by invoking googletest-list-tests-unittest_ (a program written with
-Google Test) the command line flags.
-"""
-
-import re
-import gtest_test_utils
-
-# Constants.
-
-# The command line flag for enabling/disabling listing all tests.
-LIST_TESTS_FLAG = 'gtest_list_tests'
-
-# Path to the googletest-list-tests-unittest_ program.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath('googletest-list-tests-unittest_')
-
-# The expected output when running googletest-list-tests-unittest_ with
-# --gtest_list_tests
-EXPECTED_OUTPUT_NO_FILTER_RE = re.compile(r"""FooDeathTest\.
-  Test1
-Foo\.
-  Bar1
-  Bar2
-  DISABLED_Bar3
-Abc\.
-  Xyz
-  Def
-FooBar\.
-  Baz
-FooTest\.
-  Test1
-  DISABLED_Test2
-  Test3
-TypedTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
-  TestA
-  TestB
-TypedTest/1\.  # TypeParam = int\s*\*( __ptr64)?
-  TestA
-  TestB
-TypedTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
-  TestA
-  TestB
-My/TypeParamTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
-  TestA
-  TestB
-My/TypeParamTest/1\.  # TypeParam = int\s*\*( __ptr64)?
-  TestA
-  TestB
-My/TypeParamTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
-  TestA
-  TestB
-MyInstantiation/ValueParamTest\.
-  TestA/0  # GetParam\(\) = one line
-  TestA/1  # GetParam\(\) = two\\nlines
-  TestA/2  # GetParam\(\) = a very\\nlo{241}\.\.\.
-  TestB/0  # GetParam\(\) = one line
-  TestB/1  # GetParam\(\) = two\\nlines
-  TestB/2  # GetParam\(\) = a very\\nlo{241}\.\.\.
-""")
-
-# The expected output when running googletest-list-tests-unittest_ with
-# --gtest_list_tests and --gtest_filter=Foo*.
-EXPECTED_OUTPUT_FILTER_FOO_RE = re.compile(r"""FooDeathTest\.
-  Test1
-Foo\.
-  Bar1
-  Bar2
-  DISABLED_Bar3
-FooBar\.
-  Baz
-FooTest\.
-  Test1
-  DISABLED_Test2
-  Test3
-""")
-
-# Utilities.
-
-
-def Run(args):
-  """Runs googletest-list-tests-unittest_ and returns the list of tests printed."""
-
-  return gtest_test_utils.Subprocess([EXE_PATH] + args,
-                                     capture_stderr=False).output
-
-
-# The unit test.
-
-
-class GTestListTestsUnitTest(gtest_test_utils.TestCase):
-  """Tests using the --gtest_list_tests flag to list all tests."""
-
-  def RunAndVerify(self, flag_value, expected_output_re, other_flag):
-    """Runs googletest-list-tests-unittest_ and verifies that it prints
-    the correct tests.
-
-    Args:
-      flag_value:         value of the --gtest_list_tests flag;
-                          None if the flag should not be present.
-      expected_output_re: regular expression that matches the expected
-                          output after running command;
-      other_flag:         a different flag to be passed to command
-                          along with gtest_list_tests;
-                          None if the flag should not be present.
-    """
-
-    if flag_value is None:
-      flag = ''
-      flag_expression = 'not set'
-    elif flag_value == '0':
-      flag = '--%s=0' % LIST_TESTS_FLAG
-      flag_expression = '0'
-    else:
-      flag = '--%s' % LIST_TESTS_FLAG
-      flag_expression = '1'
-
-    args = [flag]
-
-    if other_flag is not None:
-      args += [other_flag]
-
-    output = Run(args)
-
-    if expected_output_re:
-      self.assert_(
-          expected_output_re.match(output),
-          ('when %s is %s, the output of "%s" is "%s",\n'
-           'which does not match regex "%s"' %
-           (LIST_TESTS_FLAG, flag_expression, ' '.join(args), output,
-            expected_output_re.pattern)))
-    else:
-      self.assert_(
-          not EXPECTED_OUTPUT_NO_FILTER_RE.match(output),
-          ('when %s is %s, the output of "%s" is "%s"'%
-           (LIST_TESTS_FLAG, flag_expression, ' '.join(args), output)))
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(flag_value=None,
-                      expected_output_re=None,
-                      other_flag=None)
-
-  def testFlag(self):
-    """Tests using the --gtest_list_tests flag."""
-
-    self.RunAndVerify(flag_value='0',
-                      expected_output_re=None,
-                      other_flag=None)
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_NO_FILTER_RE,
-                      other_flag=None)
-
-  def testOverrideNonFilterFlags(self):
-    """Tests that --gtest_list_tests overrides the non-filter flags."""
-
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_NO_FILTER_RE,
-                      other_flag='--gtest_break_on_failure')
-
-  def testWithFilterFlags(self):
-    """Tests that --gtest_list_tests takes into account the
-    --gtest_filter flag."""
-
-    self.RunAndVerify(flag_value='1',
-                      expected_output_re=EXPECTED_OUTPUT_FILTER_FOO_RE,
-                      other_flag='--gtest_filter=Foo*')
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-list-tests-unittest_.cc b/3rdparty/gtest/test/googletest-list-tests-unittest_.cc
deleted file mode 100644
index 493c6f00..00000000
--- a/3rdparty/gtest/test/googletest-list-tests-unittest_.cc
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Unit test for Google Test's --gtest_list_tests flag.
-//
-// A user can ask Google Test to list all tests that will run
-// so that when using a filter, a user will know what
-// tests to look for. The tests will not be run after listing.
-//
-// This program will be invoked from a Python unit test.
-// Don't run it directly.
-
-#include "gtest/gtest.h"
-
-// Several different test cases and tests that will be listed.
-TEST(Foo, Bar1) {
-}
-
-TEST(Foo, Bar2) {
-}
-
-TEST(Foo, DISABLED_Bar3) {
-}
-
-TEST(Abc, Xyz) {
-}
-
-TEST(Abc, Def) {
-}
-
-TEST(FooBar, Baz) {
-}
-
-class FooTest : public testing::Test {
-};
-
-TEST_F(FooTest, Test1) {
-}
-
-TEST_F(FooTest, DISABLED_Test2) {
-}
-
-TEST_F(FooTest, Test3) {
-}
-
-TEST(FooDeathTest, Test1) {
-}
-
-// A group of value-parameterized tests.
-
-class MyType {
- public:
-  explicit MyType(const std::string& a_value) : value_(a_value) {}
-
-  const std::string& value() const { return value_; }
-
- private:
-  std::string value_;
-};
-
-// Teaches Google Test how to print a MyType.
-void PrintTo(const MyType& x, std::ostream* os) {
-  *os << x.value();
-}
-
-class ValueParamTest : public testing::TestWithParam<MyType> {
-};
-
-TEST_P(ValueParamTest, TestA) {
-}
-
-TEST_P(ValueParamTest, TestB) {
-}
-
-INSTANTIATE_TEST_SUITE_P(
-    MyInstantiation, ValueParamTest,
-    testing::Values(MyType("one line"),
-                    MyType("two\nlines"),
-                    MyType("a very\nloooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong line")));  // NOLINT
-
-// A group of typed tests.
-
-// A deliberately long type name for testing the line-truncating
-// behavior when printing a type parameter.
-class VeryLoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogName {  // NOLINT
-};
-
-template <typename T>
-class TypedTest : public testing::Test {
-};
-
-template <typename T, int kSize>
-class MyArray {
-};
-
-typedef testing::Types<VeryLoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooogName,  // NOLINT
-                       int*, MyArray<bool, 42> > MyTypes;
-
-TYPED_TEST_SUITE(TypedTest, MyTypes);
-
-TYPED_TEST(TypedTest, TestA) {
-}
-
-TYPED_TEST(TypedTest, TestB) {
-}
-
-// A group of type-parameterized tests.
-
-template <typename T>
-class TypeParamTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(TypeParamTest);
-
-TYPED_TEST_P(TypeParamTest, TestA) {
-}
-
-TYPED_TEST_P(TypeParamTest, TestB) {
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypeParamTest, TestA, TestB);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TypeParamTest, MyTypes);
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-listener-test.cc b/3rdparty/gtest/test/googletest-listener-test.cc
deleted file mode 100644
index 10457afe..00000000
--- a/3rdparty/gtest/test/googletest-listener-test.cc
+++ /dev/null
@@ -1,518 +0,0 @@
-// Copyright 2009 Google Inc. All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file verifies Google Test event listeners receive events at the
-// right times.
-
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "gtest/internal/custom/gtest.h"
-
-using ::testing::AddGlobalTestEnvironment;
-using ::testing::Environment;
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::TestSuite;
-using ::testing::TestEventListener;
-using ::testing::TestInfo;
-using ::testing::TestPartResult;
-using ::testing::UnitTest;
-
-// Used by tests to register their events.
-std::vector<std::string>* g_events = nullptr;
-
-namespace testing {
-namespace internal {
-
-class EventRecordingListener : public TestEventListener {
- public:
-  explicit EventRecordingListener(const char* name) : name_(name) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramStart"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationStart")
-            << "(" << iteration << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpStart"));
-  }
-
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpEnd"));
-  }
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseStart(const TestCase& /*test_case*/) override {
-    g_events->push_back(GetFullMethodName("OnTestCaseStart"));
-  }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestStart"));
-  }
-
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {
-    g_events->push_back(GetFullMethodName("OnTestPartResult"));
-  }
-
-  void OnTestEnd(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestEnd"));
-  }
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-  void OnTestCaseEnd(const TestCase& /*test_case*/) override {
-    g_events->push_back(GetFullMethodName("OnTestCaseEnd"));
-  }
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownStart"));
-  }
-
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownEnd"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationEnd")
-            << "("  << iteration << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramEnd"));
-  }
-
- private:
-  std::string GetFullMethodName(const char* name) {
-    return name_ + "." + name;
-  }
-
-  std::string name_;
-};
-
-// This listener is using OnTestSuiteStart, OnTestSuiteEnd API
-class EventRecordingListener2 : public TestEventListener {
- public:
-  explicit EventRecordingListener2(const char* name) : name_(name) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramStart"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationStart") << "(" << iteration
-            << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpStart"));
-  }
-
-  void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsSetUpEnd"));
-  }
-
-  void OnTestSuiteStart(const TestSuite& /*test_suite*/) override {
-    g_events->push_back(GetFullMethodName("OnTestSuiteStart"));
-  }
-
-  void OnTestStart(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestStart"));
-  }
-
-  void OnTestPartResult(const TestPartResult& /*test_part_result*/) override {
-    g_events->push_back(GetFullMethodName("OnTestPartResult"));
-  }
-
-  void OnTestEnd(const TestInfo& /*test_info*/) override {
-    g_events->push_back(GetFullMethodName("OnTestEnd"));
-  }
-
-  void OnTestSuiteEnd(const TestSuite& /*test_suite*/) override {
-    g_events->push_back(GetFullMethodName("OnTestSuiteEnd"));
-  }
-
-  void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownStart"));
-  }
-
-  void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnEnvironmentsTearDownEnd"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int iteration) override {
-    Message message;
-    message << GetFullMethodName("OnTestIterationEnd") << "(" << iteration
-            << ")";
-    g_events->push_back(message.GetString());
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    g_events->push_back(GetFullMethodName("OnTestProgramEnd"));
-  }
-
- private:
-  std::string GetFullMethodName(const char* name) { return name_ + "." + name; }
-
-  std::string name_;
-};
-
-class EnvironmentInvocationCatcher : public Environment {
- protected:
-  void SetUp() override { g_events->push_back("Environment::SetUp"); }
-
-  void TearDown() override { g_events->push_back("Environment::TearDown"); }
-};
-
-class ListenerTest : public Test {
- protected:
-  static void SetUpTestSuite() {
-    g_events->push_back("ListenerTest::SetUpTestSuite");
-  }
-
-  static void TearDownTestSuite() {
-    g_events->push_back("ListenerTest::TearDownTestSuite");
-  }
-
-  void SetUp() override { g_events->push_back("ListenerTest::SetUp"); }
-
-  void TearDown() override { g_events->push_back("ListenerTest::TearDown"); }
-};
-
-TEST_F(ListenerTest, DoesFoo) {
-  // Test execution order within a test case is not guaranteed so we are not
-  // recording the test name.
-  g_events->push_back("ListenerTest::* Test Body");
-  SUCCEED();  // Triggers OnTestPartResult.
-}
-
-TEST_F(ListenerTest, DoesBar) {
-  g_events->push_back("ListenerTest::* Test Body");
-  SUCCEED();  // Triggers OnTestPartResult.
-}
-
-}  // namespace internal
-
-}  // namespace testing
-
-using ::testing::internal::EnvironmentInvocationCatcher;
-using ::testing::internal::EventRecordingListener;
-using ::testing::internal::EventRecordingListener2;
-
-void VerifyResults(const std::vector<std::string>& data,
-                   const char* const* expected_data,
-                   size_t expected_data_size) {
-  const size_t actual_size = data.size();
-  // If the following assertion fails, a new entry will be appended to
-  // data.  Hence we save data.size() first.
-  EXPECT_EQ(expected_data_size, actual_size);
-
-  // Compares the common prefix.
-  const size_t shorter_size = expected_data_size <= actual_size ?
-      expected_data_size : actual_size;
-  size_t i = 0;
-  for (; i < shorter_size; ++i) {
-    ASSERT_STREQ(expected_data[i], data[i].c_str())
-        << "at position " << i;
-  }
-
-  // Prints extra elements in the actual data.
-  for (; i < actual_size; ++i) {
-    printf("  Actual event #%lu: %s\n",
-        static_cast<unsigned long>(i), data[i].c_str());
-  }
-}
-
-int main(int argc, char **argv) {
-  std::vector<std::string> events;
-  g_events = &events;
-  InitGoogleTest(&argc, argv);
-
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener("1st"));
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener("2nd"));
-  UnitTest::GetInstance()->listeners().Append(
-      new EventRecordingListener2("3rd"));
-
-  AddGlobalTestEnvironment(new EnvironmentInvocationCatcher);
-
-  GTEST_CHECK_(events.size() == 0)
-      << "AddGlobalTestEnvironment should not generate any events itself.";
-
-  ::testing::GTEST_FLAG(repeat) = 2;
-  int ret_val = RUN_ALL_TESTS();
-
-#ifndef GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  // The deprecated OnTestSuiteStart/OnTestCaseStart events are included
-  const char* const expected_events[] = {"1st.OnTestProgramStart",
-                                         "2nd.OnTestProgramStart",
-                                         "3rd.OnTestProgramStart",
-                                         "1st.OnTestIterationStart(0)",
-                                         "2nd.OnTestIterationStart(0)",
-                                         "3rd.OnTestIterationStart(0)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "1st.OnTestCaseStart",
-                                         "2nd.OnTestCaseStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "2nd.OnTestCaseEnd",
-                                         "1st.OnTestCaseEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(0)",
-                                         "2nd.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationStart(1)",
-                                         "2nd.OnTestIterationStart(1)",
-                                         "3rd.OnTestIterationStart(1)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "1st.OnTestCaseStart",
-                                         "2nd.OnTestCaseStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "2nd.OnTestCaseEnd",
-                                         "1st.OnTestCaseEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(1)",
-                                         "2nd.OnTestIterationEnd(1)",
-                                         "1st.OnTestIterationEnd(1)",
-                                         "3rd.OnTestProgramEnd",
-                                         "2nd.OnTestProgramEnd",
-                                         "1st.OnTestProgramEnd"};
-#else
-  const char* const expected_events[] = {"1st.OnTestProgramStart",
-                                         "2nd.OnTestProgramStart",
-                                         "3rd.OnTestProgramStart",
-                                         "1st.OnTestIterationStart(0)",
-                                         "2nd.OnTestIterationStart(0)",
-                                         "3rd.OnTestIterationStart(0)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(0)",
-                                         "2nd.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationEnd(0)",
-                                         "1st.OnTestIterationStart(1)",
-                                         "2nd.OnTestIterationStart(1)",
-                                         "3rd.OnTestIterationStart(1)",
-                                         "1st.OnEnvironmentsSetUpStart",
-                                         "2nd.OnEnvironmentsSetUpStart",
-                                         "3rd.OnEnvironmentsSetUpStart",
-                                         "Environment::SetUp",
-                                         "3rd.OnEnvironmentsSetUpEnd",
-                                         "2nd.OnEnvironmentsSetUpEnd",
-                                         "1st.OnEnvironmentsSetUpEnd",
-                                         "3rd.OnTestSuiteStart",
-                                         "ListenerTest::SetUpTestSuite",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "1st.OnTestStart",
-                                         "2nd.OnTestStart",
-                                         "3rd.OnTestStart",
-                                         "ListenerTest::SetUp",
-                                         "ListenerTest::* Test Body",
-                                         "1st.OnTestPartResult",
-                                         "2nd.OnTestPartResult",
-                                         "3rd.OnTestPartResult",
-                                         "ListenerTest::TearDown",
-                                         "3rd.OnTestEnd",
-                                         "2nd.OnTestEnd",
-                                         "1st.OnTestEnd",
-                                         "ListenerTest::TearDownTestSuite",
-                                         "3rd.OnTestSuiteEnd",
-                                         "1st.OnEnvironmentsTearDownStart",
-                                         "2nd.OnEnvironmentsTearDownStart",
-                                         "3rd.OnEnvironmentsTearDownStart",
-                                         "Environment::TearDown",
-                                         "3rd.OnEnvironmentsTearDownEnd",
-                                         "2nd.OnEnvironmentsTearDownEnd",
-                                         "1st.OnEnvironmentsTearDownEnd",
-                                         "3rd.OnTestIterationEnd(1)",
-                                         "2nd.OnTestIterationEnd(1)",
-                                         "1st.OnTestIterationEnd(1)",
-                                         "3rd.OnTestProgramEnd",
-                                         "2nd.OnTestProgramEnd",
-                                         "1st.OnTestProgramEnd"};
-#endif  // GTEST_REMOVE_LEGACY_TEST_CASEAPI_
-
-  VerifyResults(events,
-                expected_events,
-                sizeof(expected_events)/sizeof(expected_events[0]));
-
-  // We need to check manually for ad hoc test failures that happen after
-  // RUN_ALL_TESTS finishes.
-  if (UnitTest::GetInstance()->Failed())
-    ret_val = 1;
-
-  return ret_val;
-}
diff --git a/3rdparty/gtest/test/googletest-message-test.cc b/3rdparty/gtest/test/googletest-message-test.cc
deleted file mode 100644
index 962d5191..00000000
--- a/3rdparty/gtest/test/googletest-message-test.cc
+++ /dev/null
@@ -1,158 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for the Message class.
-
-#include "gtest/gtest-message.h"
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::Message;
-
-// Tests the testing::Message class
-
-// Tests the default constructor.
-TEST(MessageTest, DefaultConstructor) {
-  const Message msg;
-  EXPECT_EQ("", msg.GetString());
-}
-
-// Tests the copy constructor.
-TEST(MessageTest, CopyConstructor) {
-  const Message msg1("Hello");
-  const Message msg2(msg1);
-  EXPECT_EQ("Hello", msg2.GetString());
-}
-
-// Tests constructing a Message from a C-string.
-TEST(MessageTest, ConstructsFromCString) {
-  Message msg("Hello");
-  EXPECT_EQ("Hello", msg.GetString());
-}
-
-// Tests streaming a float.
-TEST(MessageTest, StreamsFloat) {
-  const std::string s = (Message() << 1.23456F << " " << 2.34567F).GetString();
-  // Both numbers should be printed with enough precision.
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "1.234560", s.c_str());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, " 2.345669", s.c_str());
-}
-
-// Tests streaming a double.
-TEST(MessageTest, StreamsDouble) {
-  const std::string s = (Message() << 1260570880.4555497 << " "
-                                  << 1260572265.1954534).GetString();
-  // Both numbers should be printed with enough precision.
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "1260570880.45", s.c_str());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, " 1260572265.19", s.c_str());
-}
-
-// Tests streaming a non-char pointer.
-TEST(MessageTest, StreamsPointer) {
-  int n = 0;
-  int* p = &n;
-  EXPECT_NE("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming a NULL non-char pointer.
-TEST(MessageTest, StreamsNullPointer) {
-  int* p = nullptr;
-  EXPECT_EQ("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming a C string.
-TEST(MessageTest, StreamsCString) {
-  EXPECT_EQ("Foo", (Message() << "Foo").GetString());
-}
-
-// Tests streaming a NULL C string.
-TEST(MessageTest, StreamsNullCString) {
-  char* p = nullptr;
-  EXPECT_EQ("(null)", (Message() << p).GetString());
-}
-
-// Tests streaming std::string.
-TEST(MessageTest, StreamsString) {
-  const ::std::string str("Hello");
-  EXPECT_EQ("Hello", (Message() << str).GetString());
-}
-
-// Tests that we can output strings containing embedded NULs.
-TEST(MessageTest, StreamsStringWithEmbeddedNUL) {
-  const char char_array_with_nul[] =
-      "Here's a NUL\0 and some more string";
-  const ::std::string string_with_nul(char_array_with_nul,
-                                      sizeof(char_array_with_nul) - 1);
-  EXPECT_EQ("Here's a NUL\\0 and some more string",
-            (Message() << string_with_nul).GetString());
-}
-
-// Tests streaming a NUL char.
-TEST(MessageTest, StreamsNULChar) {
-  EXPECT_EQ("\\0", (Message() << '\0').GetString());
-}
-
-// Tests streaming int.
-TEST(MessageTest, StreamsInt) {
-  EXPECT_EQ("123", (Message() << 123).GetString());
-}
-
-// Tests that basic IO manipulators (endl, ends, and flush) can be
-// streamed to Message.
-TEST(MessageTest, StreamsBasicIoManip) {
-  EXPECT_EQ("Line 1.\nA NUL char \\0 in line 2.",
-               (Message() << "Line 1." << std::endl
-                         << "A NUL char " << std::ends << std::flush
-                         << " in line 2.").GetString());
-}
-
-// Tests Message::GetString()
-TEST(MessageTest, GetString) {
-  Message msg;
-  msg << 1 << " lamb";
-  EXPECT_EQ("1 lamb", msg.GetString());
-}
-
-// Tests streaming a Message object to an ostream.
-TEST(MessageTest, StreamsToOStream) {
-  Message msg("Hello");
-  ::std::stringstream ss;
-  ss << msg;
-  EXPECT_EQ("Hello", testing::internal::StringStreamToString(&ss));
-}
-
-// Tests that a Message object doesn't take up too much stack space.
-TEST(MessageTest, DoesNotTakeUpMuchStackSpace) {
-  EXPECT_LE(sizeof(Message), 16U);
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/test/googletest-options-test.cc b/3rdparty/gtest/test/googletest-options-test.cc
deleted file mode 100644
index f07b316d..00000000
--- a/3rdparty/gtest/test/googletest-options-test.cc
+++ /dev/null
@@ -1,216 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Google Test UnitTestOptions tests
-//
-// This file tests classes and functions used internally by
-// Google Test.  They are subject to change without notice.
-//
-// This file is #included from gtest.cc, to avoid changing build or
-// make-files on Windows and other platforms. Do not #include this file
-// anywhere else!
-
-#include "gtest/gtest.h"
-
-#if GTEST_OS_WINDOWS_MOBILE
-# include <windows.h>
-#elif GTEST_OS_WINDOWS
-# include <direct.h>
-#endif  // GTEST_OS_WINDOWS_MOBILE
-
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-namespace {
-
-// Turns the given relative path into an absolute path.
-FilePath GetAbsolutePathOf(const FilePath& relative_path) {
-  return FilePath::ConcatPaths(FilePath::GetCurrentDir(), relative_path);
-}
-
-// Testing UnitTestOptions::GetOutputFormat/GetOutputFile.
-
-TEST(XmlOutputTest, GetOutputFormatDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_STREQ("", UnitTestOptions::GetOutputFormat().c_str());
-}
-
-TEST(XmlOutputTest, GetOutputFormat) {
-  GTEST_FLAG(output) = "xml:filename";
-  EXPECT_STREQ("xml", UnitTestOptions::GetOutputFormat().c_str());
-}
-
-TEST(XmlOutputTest, GetOutputFileDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_EQ(GetAbsolutePathOf(FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST(XmlOutputTest, GetOutputFileSingleFile) {
-  GTEST_FLAG(output) = "xml:filename.abc";
-  EXPECT_EQ(GetAbsolutePathOf(FilePath("filename.abc")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST(XmlOutputTest, GetOutputFileFromDirectoryPath) {
-  GTEST_FLAG(output) = "xml:path" GTEST_PATH_SEP_;
-  const std::string expected_output_file =
-      GetAbsolutePathOf(
-          FilePath(std::string("path") + GTEST_PATH_SEP_ +
-                   GetCurrentExecutableName().string() + ".xml")).string();
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-TEST(OutputFileHelpersTest, GetCurrentExecutableName) {
-  const std::string exe_str = GetCurrentExecutableName().string();
-#if GTEST_OS_WINDOWS
-  const bool success =
-      _strcmpi("googletest-options-test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest-options-ex_test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest_all_test", exe_str.c_str()) == 0 ||
-      _strcmpi("gtest_dll_test", exe_str.c_str()) == 0;
-#elif GTEST_OS_OS2
-  const bool success =
-      strcasecmp("googletest-options-test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest-options-ex_test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest_all_test", exe_str.c_str()) == 0 ||
-      strcasecmp("gtest_dll_test", exe_str.c_str()) == 0;
-#elif GTEST_OS_FUCHSIA
-  const bool success = exe_str == "app";
-#else
-  const bool success =
-      exe_str == "googletest-options-test" ||
-      exe_str == "gtest_all_test" ||
-      exe_str == "lt-gtest_all_test" ||
-      exe_str == "gtest_dll_test";
-#endif  // GTEST_OS_WINDOWS
-  if (!success)
-    FAIL() << "GetCurrentExecutableName() returns " << exe_str;
-}
-
-#if !GTEST_OS_FUCHSIA
-
-class XmlOutputChangeDirTest : public Test {
- protected:
-  void SetUp() override {
-    original_working_dir_ = FilePath::GetCurrentDir();
-    posix::ChDir("..");
-    // This will make the test fail if run from the root directory.
-    EXPECT_NE(original_working_dir_.string(),
-              FilePath::GetCurrentDir().string());
-  }
-
-  void TearDown() override {
-    posix::ChDir(original_working_dir_.string().c_str());
-  }
-
-  FilePath original_working_dir_;
-};
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithDefault) {
-  GTEST_FLAG(output) = "";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithDefaultXML) {
-  GTEST_FLAG(output) = "xml";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("test_detail.xml")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithRelativeFile) {
-  GTEST_FLAG(output) = "xml:filename.abc";
-  EXPECT_EQ(FilePath::ConcatPaths(original_working_dir_,
-                                  FilePath("filename.abc")).string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithRelativePath) {
-  GTEST_FLAG(output) = "xml:path" GTEST_PATH_SEP_;
-  const std::string expected_output_file =
-      FilePath::ConcatPaths(
-          original_working_dir_,
-          FilePath(std::string("path") + GTEST_PATH_SEP_ +
-                   GetCurrentExecutableName().string() + ".xml")).string();
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithAbsoluteFile) {
-#if GTEST_OS_WINDOWS
-  GTEST_FLAG(output) = "xml:c:\\tmp\\filename.abc";
-  EXPECT_EQ(FilePath("c:\\tmp\\filename.abc").string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-#else
-  GTEST_FLAG(output) ="xml:/tmp/filename.abc";
-  EXPECT_EQ(FilePath("/tmp/filename.abc").string(),
-            UnitTestOptions::GetAbsolutePathToOutputFile());
-#endif
-}
-
-TEST_F(XmlOutputChangeDirTest, PreserveOriginalWorkingDirWithAbsolutePath) {
-#if GTEST_OS_WINDOWS
-  const std::string path = "c:\\tmp\\";
-#else
-  const std::string path = "/tmp/";
-#endif
-
-  GTEST_FLAG(output) = "xml:" + path;
-  const std::string expected_output_file =
-      path + GetCurrentExecutableName().string() + ".xml";
-  const std::string& output_file =
-      UnitTestOptions::GetAbsolutePathToOutputFile();
-
-#if GTEST_OS_WINDOWS
-  EXPECT_STRCASEEQ(expected_output_file.c_str(), output_file.c_str());
-#else
-  EXPECT_EQ(expected_output_file, output_file.c_str());
-#endif
-}
-
-#endif  // !GTEST_OS_FUCHSIA
-
-}  // namespace
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/test/googletest-output-test-golden-lin.txt b/3rdparty/gtest/test/googletest-output-test-golden-lin.txt
deleted file mode 100644
index 038de921..00000000
--- a/3rdparty/gtest/test/googletest-output-test-golden-lin.txt
+++ /dev/null
@@ -1,1140 +0,0 @@
-The non-test part of the code is expected to have 2 failures.
-
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  3
-Stack trace: (omitted)
-
-[==========] Running 85 tests from 40 test suites.
-[----------] Global test environment set-up.
-FooEnvironment::SetUp() called.
-BarEnvironment::SetUp() called.
-[----------] 1 test from ADeathTest
-[ RUN      ] ADeathTest.ShouldRunFirst
-[       OK ] ADeathTest.ShouldRunFirst
-[----------] 1 test from ATypedDeathTest/0, where TypeParam = int
-[ RUN      ] ATypedDeathTest/0.ShouldRunFirst
-[       OK ] ATypedDeathTest/0.ShouldRunFirst
-[----------] 1 test from ATypedDeathTest/1, where TypeParam = double
-[ RUN      ] ATypedDeathTest/1.ShouldRunFirst
-[       OK ] ATypedDeathTest/1.ShouldRunFirst
-[----------] 1 test from My/ATypeParamDeathTest/0, where TypeParam = int
-[ RUN      ] My/ATypeParamDeathTest/0.ShouldRunFirst
-[       OK ] My/ATypeParamDeathTest/0.ShouldRunFirst
-[----------] 1 test from My/ATypeParamDeathTest/1, where TypeParam = double
-[ RUN      ] My/ATypeParamDeathTest/1.ShouldRunFirst
-[       OK ] My/ATypeParamDeathTest/1.ShouldRunFirst
-[----------] 2 tests from PassingTest
-[ RUN      ] PassingTest.PassingTest1
-[       OK ] PassingTest.PassingTest1
-[ RUN      ] PassingTest.PassingTest2
-[       OK ] PassingTest.PassingTest2
-[----------] 2 tests from NonfatalFailureTest
-[ RUN      ] NonfatalFailureTest.EscapesStringOperands
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  kGoldenString
-    Which is: "\"Line"
-  actual
-    Which is: "actual \"string\""
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  golden
-    Which is: "\"Line"
-  actual
-    Which is: "actual \"string\""
-Stack trace: (omitted)
-
-[  FAILED  ] NonfatalFailureTest.EscapesStringOperands
-[ RUN      ] NonfatalFailureTest.DiffForLongStrings
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  golden_str
-    Which is: "\"Line\0 1\"\nLine 2"
-  "Line 2"
-With diff:
-@@ -1,2 @@
--\"Line\0 1\"
- Line 2
-
-Stack trace: (omitted)
-
-[  FAILED  ] NonfatalFailureTest.DiffForLongStrings
-[----------] 3 tests from FatalFailureTest
-[ RUN      ] FatalFailureTest.FatalFailureInSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
-[ RUN      ] FatalFailureTest.FatalFailureInNestedSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
-[ RUN      ] FatalFailureTest.NonfatalFailureInSubroutine
-(expecting a failure on false)
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
-[----------] 1 test from LoggingTest
-[ RUN      ] LoggingTest.InterleavingLoggingAndAssertions
-(expecting 2 failures on (3) >= (a[i]))
-i == 0
-i == 1
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 9
-Stack trace: (omitted)
-
-i == 2
-i == 3
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 6
-Stack trace: (omitted)
-
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions
-[----------] 7 tests from SCOPED_TRACETest
-[ RUN      ] SCOPED_TRACETest.AcceptedValues
-googletest-output-test_.cc:#: Failure
-Failed
-Just checking that all these values work fine.
-Google Test trace:
-googletest-output-test_.cc:#: (null)
-googletest-output-test_.cc:#: 1337
-googletest-output-test_.cc:#: std::string
-googletest-output-test_.cc:#: literal string
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.AcceptedValues
-[ RUN      ] SCOPED_TRACETest.ObeysScopes
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and shouldn't have a trace.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should have a trace.
-Google Test trace:
-googletest-output-test_.cc:#: Expected trace
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and shouldn't have a trace.
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.ObeysScopes
-[ RUN      ] SCOPED_TRACETest.WorksInLoop
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  n
-    Which is: 1
-Google Test trace:
-googletest-output-test_.cc:#: i = 1
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: i = 2
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.WorksInLoop
-[ RUN      ] SCOPED_TRACETest.WorksInSubroutine
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  2
-  n
-    Which is: 1
-Google Test trace:
-googletest-output-test_.cc:#: n = 1
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: n = 2
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.WorksInSubroutine
-[ RUN      ] SCOPED_TRACETest.CanBeNested
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  n
-    Which is: 2
-Google Test trace:
-googletest-output-test_.cc:#: n = 2
-googletest-output-test_.cc:#: 
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.CanBeNested
-[ RUN      ] SCOPED_TRACETest.CanBeRepeated
-(expected to fail)
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A.
-Google Test trace:
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A and B.
-Google Test trace:
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A, B, and C.
-Google Test trace:
-googletest-output-test_.cc:#: C
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-This failure is expected, and should contain trace point A, B, and D.
-Google Test trace:
-googletest-output-test_.cc:#: D
-googletest-output-test_.cc:#: B
-googletest-output-test_.cc:#: A
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.CanBeRepeated
-[ RUN      ] SCOPED_TRACETest.WorksConcurrently
-(expecting 6 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1 (in thread B, only trace B alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace B
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2 (in thread A, trace A & B both alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3 (in thread B, trace A & B both alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace B
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4 (in thread B, only trace A alive).
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #5 (in thread A, only trace A alive).
-Google Test trace:
-googletest-output-test_.cc:#: Trace A
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #6 (in thread A, no trace alive).
-Stack trace: (omitted)
-
-[  FAILED  ] SCOPED_TRACETest.WorksConcurrently
-[----------] 1 test from ScopedTraceTest
-[ RUN      ] ScopedTraceTest.WithExplicitFileAndLine
-googletest-output-test_.cc:#: Failure
-Failed
-Check that the trace is attached to a particular location.
-Google Test trace:
-explicit_file.cc:123: expected trace message
-Stack trace: (omitted)
-
-[  FAILED  ] ScopedTraceTest.WithExplicitFileAndLine
-[----------] 1 test from NonFatalFailureInFixtureConstructorTest
-[ RUN      ] NonFatalFailureInFixtureConstructorTest.FailureInConstructor
-(expecting 5 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in the test fixture c'tor.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in the test body.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4, in TearDown.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #5, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[  FAILED  ] NonFatalFailureInFixtureConstructorTest.FailureInConstructor
-[----------] 1 test from FatalFailureInFixtureConstructorTest
-[ RUN      ] FatalFailureInFixtureConstructorTest.FailureInConstructor
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in the test fixture c'tor.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureInFixtureConstructorTest.FailureInConstructor
-[----------] 1 test from NonFatalFailureInSetUpTest
-[ RUN      ] NonFatalFailureInSetUpTest.FailureInSetUp
-(expecting 4 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in the test function.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in TearDown().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #4, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[  FAILED  ] NonFatalFailureInSetUpTest.FailureInSetUp
-[----------] 1 test from FatalFailureInSetUpTest
-[ RUN      ] FatalFailureInSetUpTest.FailureInSetUp
-(expecting 3 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #1, in SetUp().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #2, in TearDown().
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected failure #3, in the test fixture d'tor.
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureInSetUpTest.FailureInSetUp
-[----------] 1 test from AddFailureAtTest
-[ RUN      ] AddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-foo.cc:42: Failure
-Failed
-Expected nonfatal failure in foo.cc
-Stack trace: (omitted)
-
-[  FAILED  ] AddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-[----------] 1 test from GtestFailAtTest
-[ RUN      ] GtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-foo.cc:42: Failure
-Failed
-Expected fatal failure in foo.cc
-Stack trace: (omitted)
-
-[  FAILED  ] GtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-[----------] 4 tests from MixedUpTestSuiteTest
-[ RUN      ] MixedUpTestSuiteTest.FirstTestFromNamespaceFoo
-[       OK ] MixedUpTestSuiteTest.FirstTestFromNamespaceFoo
-[ RUN      ] MixedUpTestSuiteTest.SecondTestFromNamespaceFoo
-[       OK ] MixedUpTestSuiteTest.SecondTestFromNamespaceFoo
-[ RUN      ] MixedUpTestSuiteTest.ThisShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteTest,
-you defined test FirstTestFromNamespaceFoo and test ThisShouldFail
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[  FAILED  ] MixedUpTestSuiteTest.ThisShouldFail
-[ RUN      ] MixedUpTestSuiteTest.ThisShouldFailToo
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteTest,
-you defined test FirstTestFromNamespaceFoo and test ThisShouldFailToo
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[  FAILED  ] MixedUpTestSuiteTest.ThisShouldFailToo
-[----------] 2 tests from MixedUpTestSuiteWithSameTestNameTest
-[ RUN      ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[       OK ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[ RUN      ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite MixedUpTestSuiteWithSameTestNameTest,
-you defined test TheSecondTestWithThisNameShouldFail and test TheSecondTestWithThisNameShouldFail
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-[  FAILED  ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[----------] 2 tests from TEST_F_before_TEST_in_same_test_case
-[ RUN      ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTEST_F
-[       OK ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTEST_F
-[ RUN      ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite TEST_F_before_TEST_in_same_test_case,
-test DefinedUsingTEST_F is defined using TEST_F but
-test DefinedUsingTESTAndShouldFail is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-[  FAILED  ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-[----------] 2 tests from TEST_before_TEST_F_in_same_test_case
-[ RUN      ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST
-[       OK ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST
-[ RUN      ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite TEST_before_TEST_F_in_same_test_case,
-test DefinedUsingTEST_FAndShouldFail is defined using TEST_F but
-test DefinedUsingTEST is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-[  FAILED  ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-[----------] 8 tests from ExpectNonfatalFailureTest
-[ RUN      ] ExpectNonfatalFailureTest.CanReferenceGlobalVariables
-[       OK ] ExpectNonfatalFailureTest.CanReferenceGlobalVariables
-[ RUN      ] ExpectNonfatalFailureTest.CanReferenceLocalVariables
-[       OK ] ExpectNonfatalFailureTest.CanReferenceLocalVariables
-[ RUN      ] ExpectNonfatalFailureTest.SucceedsWhenThereIsOneNonfatalFailure
-[       OK ] ExpectNonfatalFailureTest.SucceedsWhenThereIsOneNonfatalFailure
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 2 failures
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure 1.
-Stack trace: (omitted)
-
-
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure 2.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenStatementReturns
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenStatementReturns
-[ RUN      ] ExpectNonfatalFailureTest.FailsWhenStatementThrows
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenStatementThrows
-[----------] 8 tests from ExpectFatalFailureTest
-[ RUN      ] ExpectFatalFailureTest.CanReferenceGlobalVariables
-[       OK ] ExpectFatalFailureTest.CanReferenceGlobalVariables
-[ RUN      ] ExpectFatalFailureTest.CanReferenceLocalStaticVariables
-[       OK ] ExpectFatalFailureTest.CanReferenceLocalStaticVariables
-[ RUN      ] ExpectFatalFailureTest.SucceedsWhenThereIsOneFatalFailure
-[       OK ] ExpectFatalFailureTest.SucceedsWhenThereIsOneFatalFailure
-[ RUN      ] ExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-[ RUN      ] ExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 2 failures
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-[ RUN      ] ExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-[ RUN      ] ExpectFatalFailureTest.FailsWhenStatementReturns
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenStatementReturns
-[ RUN      ] ExpectFatalFailureTest.FailsWhenStatementThrows
-(expecting a failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenStatementThrows
-[----------] 2 tests from TypedTest/0, where TypeParam = int
-[ RUN      ] TypedTest/0.Success
-[       OK ] TypedTest/0.Success
-[ RUN      ] TypedTest/0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] TypedTest/0.Failure, where TypeParam = int
-[----------] 2 tests from TypedTestWithNames/char0, where TypeParam = char
-[ RUN      ] TypedTestWithNames/char0.Success
-[       OK ] TypedTestWithNames/char0.Success
-[ RUN      ] TypedTestWithNames/char0.Failure
-googletest-output-test_.cc:#: Failure
-Failed
-Stack trace: (omitted)
-
-[  FAILED  ] TypedTestWithNames/char0.Failure, where TypeParam = char
-[----------] 2 tests from TypedTestWithNames/int1, where TypeParam = int
-[ RUN      ] TypedTestWithNames/int1.Success
-[       OK ] TypedTestWithNames/int1.Success
-[ RUN      ] TypedTestWithNames/int1.Failure
-googletest-output-test_.cc:#: Failure
-Failed
-Stack trace: (omitted)
-
-[  FAILED  ] TypedTestWithNames/int1.Failure, where TypeParam = int
-[----------] 2 tests from Unsigned/TypedTestP/0, where TypeParam = unsigned char
-[ RUN      ] Unsigned/TypedTestP/0.Success
-[       OK ] Unsigned/TypedTestP/0.Success
-[ RUN      ] Unsigned/TypedTestP/0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: '\0'
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] Unsigned/TypedTestP/0.Failure, where TypeParam = unsigned char
-[----------] 2 tests from Unsigned/TypedTestP/1, where TypeParam = unsigned int
-[ RUN      ] Unsigned/TypedTestP/1.Success
-[       OK ] Unsigned/TypedTestP/1.Success
-[ RUN      ] Unsigned/TypedTestP/1.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] Unsigned/TypedTestP/1.Failure, where TypeParam = unsigned int
-[----------] 2 tests from UnsignedCustomName/TypedTestP/unsignedChar0, where TypeParam = unsigned char
-[ RUN      ] UnsignedCustomName/TypedTestP/unsignedChar0.Success
-[       OK ] UnsignedCustomName/TypedTestP/unsignedChar0.Success
-[ RUN      ] UnsignedCustomName/TypedTestP/unsignedChar0.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: '\0'
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] UnsignedCustomName/TypedTestP/unsignedChar0.Failure, where TypeParam = unsigned char
-[----------] 2 tests from UnsignedCustomName/TypedTestP/unsignedInt1, where TypeParam = unsigned int
-[ RUN      ] UnsignedCustomName/TypedTestP/unsignedInt1.Success
-[       OK ] UnsignedCustomName/TypedTestP/unsignedInt1.Success
-[ RUN      ] UnsignedCustomName/TypedTestP/unsignedInt1.Failure
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1U
-    Which is: 1
-  TypeParam()
-    Which is: 0
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] UnsignedCustomName/TypedTestP/unsignedInt1.Failure, where TypeParam = unsigned int
-[----------] 4 tests from ExpectFailureTest
-[ RUN      ] ExpectFailureTest.ExpectFatalFailure
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure containing "Some other fatal failure expected."
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureTest.ExpectFatalFailure
-[ RUN      ] ExpectFailureTest.ExpectNonFatalFailure
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure containing "Some other non-fatal failure."
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureTest.ExpectNonFatalFailure
-[ RUN      ] ExpectFailureTest.ExpectFatalFailureOnAllThreads
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 fatal failure containing "Some other fatal failure expected."
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureTest.ExpectFatalFailureOnAllThreads
-[ RUN      ] ExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Success:
-Succeeded
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual:
-googletest-output-test_.cc:#: Fatal failure:
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-(expecting 1 failure)
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure containing "Some other non-fatal failure."
-  Actual:
-googletest-output-test_.cc:#: Non-fatal failure:
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-[----------] 2 tests from ExpectFailureWithThreadsTest
-[ RUN      ] ExpectFailureWithThreadsTest.ExpectFatalFailure
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-gtest.cc:#: Failure
-Expected: 1 fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureWithThreadsTest.ExpectFatalFailure
-[ RUN      ] ExpectFailureWithThreadsTest.ExpectNonFatalFailure
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-gtest.cc:#: Failure
-Expected: 1 non-fatal failure
-  Actual: 0 failures
-Stack trace: (omitted)
-
-[  FAILED  ] ExpectFailureWithThreadsTest.ExpectNonFatalFailure
-[----------] 1 test from ScopedFakeTestPartResultReporterTest
-[ RUN      ] ScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-(expecting 2 failures)
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-[  FAILED  ] ScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-[----------] 2 tests from DynamicFixture
-DynamicFixture::SetUpTestSuite
-[ RUN      ] DynamicFixture.DynamicTestPass
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[       OK ] DynamicFixture.DynamicTestPass
-[ RUN      ] DynamicFixture.DynamicTestFail
-DynamicFixture()
-DynamicFixture::SetUp
-googletest-output-test_.cc:#: Failure
-Value of: Pass
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-DynamicFixture::TearDown
-~DynamicFixture()
-[  FAILED  ] DynamicFixture.DynamicTestFail
-DynamicFixture::TearDownTestSuite
-[----------] 1 test from DynamicFixtureAnotherName
-DynamicFixture::SetUpTestSuite
-[ RUN      ] DynamicFixtureAnotherName.DynamicTestPass
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[       OK ] DynamicFixtureAnotherName.DynamicTestPass
-DynamicFixture::TearDownTestSuite
-[----------] 2 tests from BadDynamicFixture1
-DynamicFixture::SetUpTestSuite
-[ RUN      ] BadDynamicFixture1.FixtureBase
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[       OK ] BadDynamicFixture1.FixtureBase
-[ RUN      ] BadDynamicFixture1.TestBase
-DynamicFixture()
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class, so mixing TEST_F and TEST in the same test suite is
-illegal.  In test suite BadDynamicFixture1,
-test FixtureBase is defined using TEST_F but
-test TestBase is defined using TEST.  You probably
-want to change the TEST to TEST_F or move it to another test
-case.
-Stack trace: (omitted)
-
-~DynamicFixture()
-[  FAILED  ] BadDynamicFixture1.TestBase
-DynamicFixture::TearDownTestSuite
-[----------] 2 tests from BadDynamicFixture2
-DynamicFixture::SetUpTestSuite
-[ RUN      ] BadDynamicFixture2.FixtureBase
-DynamicFixture()
-DynamicFixture::SetUp
-DynamicFixture::TearDown
-~DynamicFixture()
-[       OK ] BadDynamicFixture2.FixtureBase
-[ RUN      ] BadDynamicFixture2.Derived
-DynamicFixture()
-gtest.cc:#: Failure
-Failed
-All tests in the same test suite must use the same test fixture
-class.  However, in test suite BadDynamicFixture2,
-you defined test FixtureBase and test Derived
-using two different test fixture classes.  This can happen if
-the two classes are from different namespaces or translation
-units and have the same name.  You should probably rename one
-of the classes to put the tests into different test suites.
-Stack trace: (omitted)
-
-~DynamicFixture()
-[  FAILED  ] BadDynamicFixture2.Derived
-DynamicFixture::TearDownTestSuite
-[----------] 1 test from PrintingFailingParams/FailingParamTest
-[ RUN      ] PrintingFailingParams/FailingParamTest.Fails/0
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  GetParam()
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] PrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
-[----------] 1 test from EmptyBasenameParamInst
-[ RUN      ] EmptyBasenameParamInst.Passes/0
-[       OK ] EmptyBasenameParamInst.Passes/0
-[----------] 2 tests from PrintingStrings/ParamTest
-[ RUN      ] PrintingStrings/ParamTest.Success/a
-[       OK ] PrintingStrings/ParamTest.Success/a
-[ RUN      ] PrintingStrings/ParamTest.Failure/a
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  "b"
-  GetParam()
-    Which is: "a"
-Expected failure
-Stack trace: (omitted)
-
-[  FAILED  ] PrintingStrings/ParamTest.Failure/a, where GetParam() = "a"
-[----------] Global test environment tear-down
-BarEnvironment::TearDown() called.
-googletest-output-test_.cc:#: Failure
-Failed
-Expected non-fatal failure.
-Stack trace: (omitted)
-
-FooEnvironment::TearDown() called.
-googletest-output-test_.cc:#: Failure
-Failed
-Expected fatal failure.
-Stack trace: (omitted)
-
-[==========] 85 tests from 40 test suites ran.
-[  PASSED  ] 31 tests.
-[  FAILED  ] 54 tests, listed below:
-[  FAILED  ] NonfatalFailureTest.EscapesStringOperands
-[  FAILED  ] NonfatalFailureTest.DiffForLongStrings
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions
-[  FAILED  ] SCOPED_TRACETest.AcceptedValues
-[  FAILED  ] SCOPED_TRACETest.ObeysScopes
-[  FAILED  ] SCOPED_TRACETest.WorksInLoop
-[  FAILED  ] SCOPED_TRACETest.WorksInSubroutine
-[  FAILED  ] SCOPED_TRACETest.CanBeNested
-[  FAILED  ] SCOPED_TRACETest.CanBeRepeated
-[  FAILED  ] SCOPED_TRACETest.WorksConcurrently
-[  FAILED  ] ScopedTraceTest.WithExplicitFileAndLine
-[  FAILED  ] NonFatalFailureInFixtureConstructorTest.FailureInConstructor
-[  FAILED  ] FatalFailureInFixtureConstructorTest.FailureInConstructor
-[  FAILED  ] NonFatalFailureInSetUpTest.FailureInSetUp
-[  FAILED  ] FatalFailureInSetUpTest.FailureInSetUp
-[  FAILED  ] AddFailureAtTest.MessageContainsSpecifiedFileAndLineNumber
-[  FAILED  ] GtestFailAtTest.MessageContainsSpecifiedFileAndLineNumber
-[  FAILED  ] MixedUpTestSuiteTest.ThisShouldFail
-[  FAILED  ] MixedUpTestSuiteTest.ThisShouldFailToo
-[  FAILED  ] MixedUpTestSuiteWithSameTestNameTest.TheSecondTestWithThisNameShouldFail
-[  FAILED  ] TEST_F_before_TEST_in_same_test_case.DefinedUsingTESTAndShouldFail
-[  FAILED  ] TEST_before_TEST_F_in_same_test_case.DefinedUsingTEST_FAndShouldFail
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereIsNoNonfatalFailure
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereAreTwoNonfatalFailures
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenThereIsOneFatalFailure
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenStatementReturns
-[  FAILED  ] ExpectNonfatalFailureTest.FailsWhenStatementThrows
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereIsNoFatalFailure
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereAreTwoFatalFailures
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenThereIsOneNonfatalFailure
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenStatementReturns
-[  FAILED  ] ExpectFatalFailureTest.FailsWhenStatementThrows
-[  FAILED  ] TypedTest/0.Failure, where TypeParam = int
-[  FAILED  ] TypedTestWithNames/char0.Failure, where TypeParam = char
-[  FAILED  ] TypedTestWithNames/int1.Failure, where TypeParam = int
-[  FAILED  ] Unsigned/TypedTestP/0.Failure, where TypeParam = unsigned char
-[  FAILED  ] Unsigned/TypedTestP/1.Failure, where TypeParam = unsigned int
-[  FAILED  ] UnsignedCustomName/TypedTestP/unsignedChar0.Failure, where TypeParam = unsigned char
-[  FAILED  ] UnsignedCustomName/TypedTestP/unsignedInt1.Failure, where TypeParam = unsigned int
-[  FAILED  ] ExpectFailureTest.ExpectFatalFailure
-[  FAILED  ] ExpectFailureTest.ExpectNonFatalFailure
-[  FAILED  ] ExpectFailureTest.ExpectFatalFailureOnAllThreads
-[  FAILED  ] ExpectFailureTest.ExpectNonFatalFailureOnAllThreads
-[  FAILED  ] ExpectFailureWithThreadsTest.ExpectFatalFailure
-[  FAILED  ] ExpectFailureWithThreadsTest.ExpectNonFatalFailure
-[  FAILED  ] ScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
-[  FAILED  ] DynamicFixture.DynamicTestFail
-[  FAILED  ] BadDynamicFixture1.TestBase
-[  FAILED  ] BadDynamicFixture2.Derived
-[  FAILED  ] PrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
-[  FAILED  ] PrintingStrings/ParamTest.Failure/a, where GetParam() = "a"
-
-54 FAILED TESTS
-  YOU HAVE 1 DISABLED TEST
-
-Note: Google Test filter = FatalFailureTest.*:LoggingTest.*
-[==========] Running 4 tests from 2 test suites.
-[----------] Global test environment set-up.
-[----------] 3 tests from FatalFailureTest
-[ RUN      ] FatalFailureTest.FatalFailureInSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine (? ms)
-[ RUN      ] FatalFailureTest.FatalFailureInNestedSubroutine
-(expecting a failure that x should be 1)
-googletest-output-test_.cc:#: Failure
-Expected equality of these values:
-  1
-  x
-    Which is: 2
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine (? ms)
-[ RUN      ] FatalFailureTest.NonfatalFailureInSubroutine
-(expecting a failure on false)
-googletest-output-test_.cc:#: Failure
-Value of: false
-  Actual: false
-Expected: true
-Stack trace: (omitted)
-
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine (? ms)
-[----------] 3 tests from FatalFailureTest (? ms total)
-
-[----------] 1 test from LoggingTest
-[ RUN      ] LoggingTest.InterleavingLoggingAndAssertions
-(expecting 2 failures on (3) >= (a[i]))
-i == 0
-i == 1
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 9
-Stack trace: (omitted)
-
-i == 2
-i == 3
-googletest-output-test_.cc:#: Failure
-Expected: (3) >= (a[i]), actual: 3 vs 6
-Stack trace: (omitted)
-
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions (? ms)
-[----------] 1 test from LoggingTest (? ms total)
-
-[----------] Global test environment tear-down
-[==========] 4 tests from 2 test suites ran. (? ms total)
-[  PASSED  ] 0 tests.
-[  FAILED  ] 4 tests, listed below:
-[  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
-[  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
-[  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
-[  FAILED  ] LoggingTest.InterleavingLoggingAndAssertions
-
- 4 FAILED TESTS
-Note: Google Test filter = *DISABLED_*
-[==========] Running 1 test from 1 test suite.
-[----------] Global test environment set-up.
-[----------] 1 test from DisabledTestsWarningTest
-[ RUN      ] DisabledTestsWarningTest.DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning
-[       OK ] DisabledTestsWarningTest.DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning
-[----------] Global test environment tear-down
-[==========] 1 test from 1 test suite ran.
-[  PASSED  ] 1 test.
-Note: Google Test filter = PassingTest.*
-Note: This is test shard 2 of 2.
-[==========] Running 1 test from 1 test suite.
-[----------] Global test environment set-up.
-[----------] 1 test from PassingTest
-[ RUN      ] PassingTest.PassingTest2
-[       OK ] PassingTest.PassingTest2
-[----------] Global test environment tear-down
-[==========] 1 test from 1 test suite ran.
-[  PASSED  ] 1 test.
diff --git a/3rdparty/gtest/test/googletest-output-test.py b/3rdparty/gtest/test/googletest-output-test.py
deleted file mode 100644
index c727f17a..00000000
--- a/3rdparty/gtest/test/googletest-output-test.py
+++ /dev/null
@@ -1,346 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests the text output of Google C++ Testing and Mocking Framework.
-
-To update the golden file:
-googletest_output_test.py --build_dir=BUILD/DIR --gengolden
-where BUILD/DIR contains the built googletest-output-test_ file.
-googletest_output_test.py --gengolden
-googletest_output_test.py
-"""
-
-import difflib
-import os
-import re
-import sys
-import gtest_test_utils
-
-
-# The flag for generating the golden file
-GENGOLDEN_FLAG = '--gengolden'
-CATCH_EXCEPTIONS_ENV_VAR_NAME = 'GTEST_CATCH_EXCEPTIONS'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-IS_WINDOWS = os.name == 'nt'
-
-GOLDEN_NAME = 'googletest-output-test-golden-lin.txt'
-
-PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('googletest-output-test_')
-
-# At least one command we exercise must not have the
-# 'internal_skip_environment_and_ad_hoc_tests' argument.
-COMMAND_LIST_TESTS = ({}, [PROGRAM_PATH, '--gtest_list_tests'])
-COMMAND_WITH_COLOR = ({}, [PROGRAM_PATH, '--gtest_color=yes'])
-COMMAND_WITH_TIME = ({}, [PROGRAM_PATH,
-                          '--gtest_print_time',
-                          'internal_skip_environment_and_ad_hoc_tests',
-                          '--gtest_filter=FatalFailureTest.*:LoggingTest.*'])
-COMMAND_WITH_DISABLED = (
-    {}, [PROGRAM_PATH,
-         '--gtest_also_run_disabled_tests',
-         'internal_skip_environment_and_ad_hoc_tests',
-         '--gtest_filter=*DISABLED_*'])
-COMMAND_WITH_SHARDING = (
-    {'GTEST_SHARD_INDEX': '1', 'GTEST_TOTAL_SHARDS': '2'},
-    [PROGRAM_PATH,
-     'internal_skip_environment_and_ad_hoc_tests',
-     '--gtest_filter=PassingTest.*'])
-
-GOLDEN_PATH = os.path.join(gtest_test_utils.GetSourceDir(), GOLDEN_NAME)
-
-
-def ToUnixLineEnding(s):
-  """Changes all Windows/Mac line endings in s to UNIX line endings."""
-
-  return s.replace('\r\n', '\n').replace('\r', '\n')
-
-
-def RemoveLocations(test_output):
-  """Removes all file location info from a Google Test program's output.
-
-  Args:
-       test_output:  the output of a Google Test program.
-
-  Returns:
-       output with all file location info (in the form of
-       'DIRECTORY/FILE_NAME:LINE_NUMBER: 'or
-       'DIRECTORY\\FILE_NAME(LINE_NUMBER): ') replaced by
-       'FILE_NAME:#: '.
-  """
-
-  return re.sub(r'.*[/\\]((googletest-output-test_|gtest).cc)(\:\d+|\(\d+\))\: ',
-                r'\1:#: ', test_output)
-
-
-def RemoveStackTraceDetails(output):
-  """Removes all stack traces from a Google Test program's output."""
-
-  # *? means "find the shortest string that matches".
-  return re.sub(r'Stack trace:(.|\n)*?\n\n',
-                'Stack trace: (omitted)\n\n', output)
-
-
-def RemoveStackTraces(output):
-  """Removes all traces of stack traces from a Google Test program's output."""
-
-  # *? means "find the shortest string that matches".
-  return re.sub(r'Stack trace:(.|\n)*?\n\n', '', output)
-
-
-def RemoveTime(output):
-  """Removes all time information from a Google Test program's output."""
-
-  return re.sub(r'\(\d+ ms', '(? ms', output)
-
-
-def RemoveTypeInfoDetails(test_output):
-  """Removes compiler-specific type info from Google Test program's output.
-
-  Args:
-       test_output:  the output of a Google Test program.
-
-  Returns:
-       output with type information normalized to canonical form.
-  """
-
-  # some compilers output the name of type 'unsigned int' as 'unsigned'
-  return re.sub(r'unsigned int', 'unsigned', test_output)
-
-
-def NormalizeToCurrentPlatform(test_output):
-  """Normalizes platform specific output details for easier comparison."""
-
-  if IS_WINDOWS:
-    # Removes the color information that is not present on Windows.
-    test_output = re.sub('\x1b\\[(0;3\d)?m', '', test_output)
-    # Changes failure message headers into the Windows format.
-    test_output = re.sub(r': Failure\n', r': error: ', test_output)
-    # Changes file(line_number) to file:line_number.
-    test_output = re.sub(r'((\w|\.)+)\((\d+)\):', r'\1:\3:', test_output)
-
-  return test_output
-
-
-def RemoveTestCounts(output):
-  """Removes test counts from a Google Test program's output."""
-
-  output = re.sub(r'\d+ tests?, listed below',
-                  '? tests, listed below', output)
-  output = re.sub(r'\d+ FAILED TESTS',
-                  '? FAILED TESTS', output)
-  output = re.sub(r'\d+ tests? from \d+ test cases?',
-                  '? tests from ? test cases', output)
-  output = re.sub(r'\d+ tests? from ([a-zA-Z_])',
-                  r'? tests from \1', output)
-  return re.sub(r'\d+ tests?\.', '? tests.', output)
-
-
-def RemoveMatchingTests(test_output, pattern):
-  """Removes output of specified tests from a Google Test program's output.
-
-  This function strips not only the beginning and the end of a test but also
-  all output in between.
-
-  Args:
-    test_output:       A string containing the test output.
-    pattern:           A regex string that matches names of test cases or
-                       tests to remove.
-
-  Returns:
-    Contents of test_output with tests whose names match pattern removed.
-  """
-
-  test_output = re.sub(
-      r'.*\[ RUN      \] .*%s(.|\n)*?\[(  FAILED  |       OK )\] .*%s.*\n' % (
-          pattern, pattern),
-      '',
-      test_output)
-  return re.sub(r'.*%s.*\n' % pattern, '', test_output)
-
-
-def NormalizeOutput(output):
-  """Normalizes output (the output of googletest-output-test_.exe)."""
-
-  output = ToUnixLineEnding(output)
-  output = RemoveLocations(output)
-  output = RemoveStackTraceDetails(output)
-  output = RemoveTime(output)
-  return output
-
-
-def GetShellCommandOutput(env_cmd):
-  """Runs a command in a sub-process, and returns its output in a string.
-
-  Args:
-    env_cmd: The shell command. A 2-tuple where element 0 is a dict of extra
-             environment variables to set, and element 1 is a string with
-             the command and any flags.
-
-  Returns:
-    A string with the command's combined standard and diagnostic output.
-  """
-
-  # Spawns cmd in a sub-process, and gets its standard I/O file objects.
-  # Set and save the environment properly.
-  environ = os.environ.copy()
-  environ.update(env_cmd[0])
-  p = gtest_test_utils.Subprocess(env_cmd[1], env=environ)
-
-  return p.output
-
-
-def GetCommandOutput(env_cmd):
-  """Runs a command and returns its output with all file location
-  info stripped off.
-
-  Args:
-    env_cmd:  The shell command. A 2-tuple where element 0 is a dict of extra
-              environment variables to set, and element 1 is a string with
-              the command and any flags.
-  """
-
-  # Disables exception pop-ups on Windows.
-  environ, cmdline = env_cmd
-  environ = dict(environ)  # Ensures we are modifying a copy.
-  environ[CATCH_EXCEPTIONS_ENV_VAR_NAME] = '1'
-  return NormalizeOutput(GetShellCommandOutput((environ, cmdline)))
-
-
-def GetOutputOfAllCommands():
-  """Returns concatenated output from several representative commands."""
-
-  return (GetCommandOutput(COMMAND_WITH_COLOR) +
-          GetCommandOutput(COMMAND_WITH_TIME) +
-          GetCommandOutput(COMMAND_WITH_DISABLED) +
-          GetCommandOutput(COMMAND_WITH_SHARDING))
-
-
-test_list = GetShellCommandOutput(COMMAND_LIST_TESTS)
-SUPPORTS_DEATH_TESTS = 'DeathTest' in test_list
-SUPPORTS_TYPED_TESTS = 'TypedTest' in test_list
-SUPPORTS_THREADS = 'ExpectFailureWithThreadsTest' in test_list
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-CAN_GENERATE_GOLDEN_FILE = (SUPPORTS_DEATH_TESTS and
-                            SUPPORTS_TYPED_TESTS and
-                            SUPPORTS_THREADS and
-                            SUPPORTS_STACK_TRACES)
-
-class GTestOutputTest(gtest_test_utils.TestCase):
-  def RemoveUnsupportedTests(self, test_output):
-    if not SUPPORTS_DEATH_TESTS:
-      test_output = RemoveMatchingTests(test_output, 'DeathTest')
-    if not SUPPORTS_TYPED_TESTS:
-      test_output = RemoveMatchingTests(test_output, 'TypedTest')
-      test_output = RemoveMatchingTests(test_output, 'TypedDeathTest')
-      test_output = RemoveMatchingTests(test_output, 'TypeParamDeathTest')
-    if not SUPPORTS_THREADS:
-      test_output = RemoveMatchingTests(test_output,
-                                        'ExpectFailureWithThreadsTest')
-      test_output = RemoveMatchingTests(test_output,
-                                        'ScopedFakeTestPartResultReporterTest')
-      test_output = RemoveMatchingTests(test_output,
-                                        'WorksConcurrently')
-    if not SUPPORTS_STACK_TRACES:
-      test_output = RemoveStackTraces(test_output)
-
-    return test_output
-
-  def testOutput(self):
-    output = GetOutputOfAllCommands()
-
-    golden_file = open(GOLDEN_PATH, 'rb')
-    # A mis-configured source control system can cause \r appear in EOL
-    # sequences when we read the golden file irrespective of an operating
-    # system used. Therefore, we need to strip those \r's from newlines
-    # unconditionally.
-    golden = ToUnixLineEnding(golden_file.read().decode())
-    golden_file.close()
-
-    # We want the test to pass regardless of certain features being
-    # supported or not.
-
-    # We still have to remove type name specifics in all cases.
-    normalized_actual = RemoveTypeInfoDetails(output)
-    normalized_golden = RemoveTypeInfoDetails(golden)
-
-    if CAN_GENERATE_GOLDEN_FILE:
-      self.assertEqual(normalized_golden, normalized_actual,
-                       '\n'.join(difflib.unified_diff(
-                           normalized_golden.split('\n'),
-                           normalized_actual.split('\n'),
-                           'golden', 'actual')))
-    else:
-      normalized_actual = NormalizeToCurrentPlatform(
-          RemoveTestCounts(normalized_actual))
-      normalized_golden = NormalizeToCurrentPlatform(
-          RemoveTestCounts(self.RemoveUnsupportedTests(normalized_golden)))
-
-      # This code is very handy when debugging golden file differences:
-      if os.getenv('DEBUG_GTEST_OUTPUT_TEST'):
-        open(os.path.join(
-            gtest_test_utils.GetSourceDir(),
-            '_googletest-output-test_normalized_actual.txt'), 'wb').write(
-                normalized_actual)
-        open(os.path.join(
-            gtest_test_utils.GetSourceDir(),
-            '_googletest-output-test_normalized_golden.txt'), 'wb').write(
-                normalized_golden)
-
-      self.assertEqual(normalized_golden, normalized_actual)
-
-
-if __name__ == '__main__':
-  if NO_STACKTRACE_SUPPORT_FLAG in sys.argv:
-    # unittest.main() can't handle unknown flags
-    sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-  if GENGOLDEN_FLAG in sys.argv:
-    if CAN_GENERATE_GOLDEN_FILE:
-      output = GetOutputOfAllCommands()
-      golden_file = open(GOLDEN_PATH, 'wb')
-      golden_file.write(output)
-      golden_file.close()
-    else:
-      message = (
-          """Unable to write a golden file when compiled in an environment
-that does not support all the required features (death tests,
-typed tests, stack traces, and multiple threads).
-Please build this test and generate the golden file using Blaze on Linux.""")
-
-      sys.stderr.write(message)
-      sys.exit(1)
-  else:
-    gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-output-test_.cc b/3rdparty/gtest/test/googletest-output-test_.cc
deleted file mode 100644
index 4f716d84..00000000
--- a/3rdparty/gtest/test/googletest-output-test_.cc
+++ /dev/null
@@ -1,1157 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The purpose of this file is to generate Google Test output under
-// various conditions.  The output will then be verified by
-// googletest-output-test.py to ensure that Google Test generates the
-// desired messages.  Therefore, most tests in this file are MEANT TO
-// FAIL.
-
-#include "gtest/gtest-spi.h"
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-#include <stdlib.h>
-
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127 /* conditional expression is constant */)
-#endif  //  _MSC_VER
-
-#if GTEST_IS_THREADSAFE
-using testing::ScopedFakeTestPartResultReporter;
-using testing::TestPartResultArray;
-
-using testing::internal::Notification;
-using testing::internal::ThreadWithParam;
-#endif
-
-namespace posix = ::testing::internal::posix;
-
-// Tests catching fatal failures.
-
-// A subroutine used by the following test.
-void TestEq1(int x) {
-  ASSERT_EQ(1, x);
-}
-
-// This function calls a test subroutine, catches the fatal failure it
-// generates, and then returns early.
-void TryTestSubroutine() {
-  // Calls a subrountine that yields a fatal failure.
-  TestEq1(2);
-
-  // Catches the fatal failure and aborts the test.
-  //
-  // The testing::Test:: prefix is necessary when calling
-  // HasFatalFailure() outside of a TEST, TEST_F, or test fixture.
-  if (testing::Test::HasFatalFailure()) return;
-
-  // If we get here, something is wrong.
-  FAIL() << "This should never be reached.";
-}
-
-TEST(PassingTest, PassingTest1) {
-}
-
-TEST(PassingTest, PassingTest2) {
-}
-
-// Tests that parameters of failing parameterized tests are printed in the
-// failing test summary.
-class FailingParamTest : public testing::TestWithParam<int> {};
-
-TEST_P(FailingParamTest, Fails) {
-  EXPECT_EQ(1, GetParam());
-}
-
-// This generates a test which will fail. Google Test is expected to print
-// its parameter when it outputs the list of all failed tests.
-INSTANTIATE_TEST_SUITE_P(PrintingFailingParams,
-                         FailingParamTest,
-                         testing::Values(2));
-
-// Tests that an empty value for the test suite basename yields just
-// the test name without any prior /
-class EmptyBasenameParamInst : public testing::TestWithParam<int> {};
-
-TEST_P(EmptyBasenameParamInst, Passes) { EXPECT_EQ(1, GetParam()); }
-
-INSTANTIATE_TEST_SUITE_P(, EmptyBasenameParamInst, testing::Values(1));
-
-static const char kGoldenString[] = "\"Line\0 1\"\nLine 2";
-
-TEST(NonfatalFailureTest, EscapesStringOperands) {
-  std::string actual = "actual \"string\"";
-  EXPECT_EQ(kGoldenString, actual);
-
-  const char* golden = kGoldenString;
-  EXPECT_EQ(golden, actual);
-}
-
-TEST(NonfatalFailureTest, DiffForLongStrings) {
-  std::string golden_str(kGoldenString, sizeof(kGoldenString) - 1);
-  EXPECT_EQ(golden_str, "Line 2");
-}
-
-// Tests catching a fatal failure in a subroutine.
-TEST(FatalFailureTest, FatalFailureInSubroutine) {
-  printf("(expecting a failure that x should be 1)\n");
-
-  TryTestSubroutine();
-}
-
-// Tests catching a fatal failure in a nested subroutine.
-TEST(FatalFailureTest, FatalFailureInNestedSubroutine) {
-  printf("(expecting a failure that x should be 1)\n");
-
-  // Calls a subrountine that yields a fatal failure.
-  TryTestSubroutine();
-
-  // Catches the fatal failure and aborts the test.
-  //
-  // When calling HasFatalFailure() inside a TEST, TEST_F, or test
-  // fixture, the testing::Test:: prefix is not needed.
-  if (HasFatalFailure()) return;
-
-  // If we get here, something is wrong.
-  FAIL() << "This should never be reached.";
-}
-
-// Tests HasFatalFailure() after a failed EXPECT check.
-TEST(FatalFailureTest, NonfatalFailureInSubroutine) {
-  printf("(expecting a failure on false)\n");
-  EXPECT_TRUE(false);  // Generates a nonfatal failure
-  ASSERT_FALSE(HasFatalFailure());  // This should succeed.
-}
-
-// Tests interleaving user logging and Google Test assertions.
-TEST(LoggingTest, InterleavingLoggingAndAssertions) {
-  static const int a[4] = {
-    3, 9, 2, 6
-  };
-
-  printf("(expecting 2 failures on (3) >= (a[i]))\n");
-  for (int i = 0; i < static_cast<int>(sizeof(a)/sizeof(*a)); i++) {
-    printf("i == %d\n", i);
-    EXPECT_GE(3, a[i]);
-  }
-}
-
-// Tests the SCOPED_TRACE macro.
-
-// A helper function for testing SCOPED_TRACE.
-void SubWithoutTrace(int n) {
-  EXPECT_EQ(1, n);
-  ASSERT_EQ(2, n);
-}
-
-// Another helper function for testing SCOPED_TRACE.
-void SubWithTrace(int n) {
-  SCOPED_TRACE(testing::Message() << "n = " << n);
-
-  SubWithoutTrace(n);
-}
-
-TEST(SCOPED_TRACETest, AcceptedValues) {
-  SCOPED_TRACE("literal string");
-  SCOPED_TRACE(std::string("std::string"));
-  SCOPED_TRACE(1337);  // streamable type
-  const char* null_value = nullptr;
-  SCOPED_TRACE(null_value);
-
-  ADD_FAILURE() << "Just checking that all these values work fine.";
-}
-
-// Tests that SCOPED_TRACE() obeys lexical scopes.
-TEST(SCOPED_TRACETest, ObeysScopes) {
-  printf("(expected to fail)\n");
-
-  // There should be no trace before SCOPED_TRACE() is invoked.
-  ADD_FAILURE() << "This failure is expected, and shouldn't have a trace.";
-
-  {
-    SCOPED_TRACE("Expected trace");
-    // After SCOPED_TRACE(), a failure in the current scope should contain
-    // the trace.
-    ADD_FAILURE() << "This failure is expected, and should have a trace.";
-  }
-
-  // Once the control leaves the scope of the SCOPED_TRACE(), there
-  // should be no trace again.
-  ADD_FAILURE() << "This failure is expected, and shouldn't have a trace.";
-}
-
-// Tests that SCOPED_TRACE works inside a loop.
-TEST(SCOPED_TRACETest, WorksInLoop) {
-  printf("(expected to fail)\n");
-
-  for (int i = 1; i <= 2; i++) {
-    SCOPED_TRACE(testing::Message() << "i = " << i);
-
-    SubWithoutTrace(i);
-  }
-}
-
-// Tests that SCOPED_TRACE works in a subroutine.
-TEST(SCOPED_TRACETest, WorksInSubroutine) {
-  printf("(expected to fail)\n");
-
-  SubWithTrace(1);
-  SubWithTrace(2);
-}
-
-// Tests that SCOPED_TRACE can be nested.
-TEST(SCOPED_TRACETest, CanBeNested) {
-  printf("(expected to fail)\n");
-
-  SCOPED_TRACE("");  // A trace without a message.
-
-  SubWithTrace(2);
-}
-
-// Tests that multiple SCOPED_TRACEs can be used in the same scope.
-TEST(SCOPED_TRACETest, CanBeRepeated) {
-  printf("(expected to fail)\n");
-
-  SCOPED_TRACE("A");
-  ADD_FAILURE()
-      << "This failure is expected, and should contain trace point A.";
-
-  SCOPED_TRACE("B");
-  ADD_FAILURE()
-      << "This failure is expected, and should contain trace point A and B.";
-
-  {
-    SCOPED_TRACE("C");
-    ADD_FAILURE() << "This failure is expected, and should "
-                  << "contain trace point A, B, and C.";
-  }
-
-  SCOPED_TRACE("D");
-  ADD_FAILURE() << "This failure is expected, and should "
-                << "contain trace point A, B, and D.";
-}
-
-#if GTEST_IS_THREADSAFE
-// Tests that SCOPED_TRACE()s can be used concurrently from multiple
-// threads.  Namely, an assertion should be affected by
-// SCOPED_TRACE()s in its own thread only.
-
-// Here's the sequence of actions that happen in the test:
-//
-//   Thread A (main)                | Thread B (spawned)
-//   ===============================|================================
-//   spawns thread B                |
-//   -------------------------------+--------------------------------
-//   waits for n1                   | SCOPED_TRACE("Trace B");
-//                                  | generates failure #1
-//                                  | notifies n1
-//   -------------------------------+--------------------------------
-//   SCOPED_TRACE("Trace A");       | waits for n2
-//   generates failure #2           |
-//   notifies n2                    |
-//   -------------------------------|--------------------------------
-//   waits for n3                   | generates failure #3
-//                                  | trace B dies
-//                                  | generates failure #4
-//                                  | notifies n3
-//   -------------------------------|--------------------------------
-//   generates failure #5           | finishes
-//   trace A dies                   |
-//   generates failure #6           |
-//   -------------------------------|--------------------------------
-//   waits for thread B to finish   |
-
-struct CheckPoints {
-  Notification n1;
-  Notification n2;
-  Notification n3;
-};
-
-static void ThreadWithScopedTrace(CheckPoints* check_points) {
-  {
-    SCOPED_TRACE("Trace B");
-    ADD_FAILURE()
-        << "Expected failure #1 (in thread B, only trace B alive).";
-    check_points->n1.Notify();
-    check_points->n2.WaitForNotification();
-
-    ADD_FAILURE()
-        << "Expected failure #3 (in thread B, trace A & B both alive).";
-  }  // Trace B dies here.
-  ADD_FAILURE()
-      << "Expected failure #4 (in thread B, only trace A alive).";
-  check_points->n3.Notify();
-}
-
-TEST(SCOPED_TRACETest, WorksConcurrently) {
-  printf("(expecting 6 failures)\n");
-
-  CheckPoints check_points;
-  ThreadWithParam<CheckPoints*> thread(&ThreadWithScopedTrace, &check_points,
-                                       nullptr);
-  check_points.n1.WaitForNotification();
-
-  {
-    SCOPED_TRACE("Trace A");
-    ADD_FAILURE()
-        << "Expected failure #2 (in thread A, trace A & B both alive).";
-    check_points.n2.Notify();
-    check_points.n3.WaitForNotification();
-
-    ADD_FAILURE()
-        << "Expected failure #5 (in thread A, only trace A alive).";
-  }  // Trace A dies here.
-  ADD_FAILURE()
-      << "Expected failure #6 (in thread A, no trace alive).";
-  thread.Join();
-}
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests basic functionality of the ScopedTrace utility (most of its features
-// are already tested in SCOPED_TRACETest).
-TEST(ScopedTraceTest, WithExplicitFileAndLine) {
-  testing::ScopedTrace trace("explicit_file.cc", 123, "expected trace message");
-  ADD_FAILURE() << "Check that the trace is attached to a particular location.";
-}
-
-TEST(DisabledTestsWarningTest,
-     DISABLED_AlsoRunDisabledTestsFlagSuppressesWarning) {
-  // This test body is intentionally empty.  Its sole purpose is for
-  // verifying that the --gtest_also_run_disabled_tests flag
-  // suppresses the "YOU HAVE 12 DISABLED TESTS" warning at the end of
-  // the test output.
-}
-
-// Tests using assertions outside of TEST and TEST_F.
-//
-// This function creates two failures intentionally.
-void AdHocTest() {
-  printf("The non-test part of the code is expected to have 2 failures.\n\n");
-  EXPECT_TRUE(false);
-  EXPECT_EQ(2, 3);
-}
-
-// Runs all TESTs, all TEST_Fs, and the ad hoc test.
-int RunAllTests() {
-  AdHocTest();
-  return RUN_ALL_TESTS();
-}
-
-// Tests non-fatal failures in the fixture constructor.
-class NonFatalFailureInFixtureConstructorTest : public testing::Test {
- protected:
-  NonFatalFailureInFixtureConstructorTest() {
-    printf("(expecting 5 failures)\n");
-    ADD_FAILURE() << "Expected failure #1, in the test fixture c'tor.";
-  }
-
-  ~NonFatalFailureInFixtureConstructorTest() override {
-    ADD_FAILURE() << "Expected failure #5, in the test fixture d'tor.";
-  }
-
-  void SetUp() override { ADD_FAILURE() << "Expected failure #2, in SetUp()."; }
-
-  void TearDown() override {
-    ADD_FAILURE() << "Expected failure #4, in TearDown.";
-  }
-};
-
-TEST_F(NonFatalFailureInFixtureConstructorTest, FailureInConstructor) {
-  ADD_FAILURE() << "Expected failure #3, in the test body.";
-}
-
-// Tests fatal failures in the fixture constructor.
-class FatalFailureInFixtureConstructorTest : public testing::Test {
- protected:
-  FatalFailureInFixtureConstructorTest() {
-    printf("(expecting 2 failures)\n");
-    Init();
-  }
-
-  ~FatalFailureInFixtureConstructorTest() override {
-    ADD_FAILURE() << "Expected failure #2, in the test fixture d'tor.";
-  }
-
-  void SetUp() override {
-    ADD_FAILURE() << "UNEXPECTED failure in SetUp().  "
-                  << "We should never get here, as the test fixture c'tor "
-                  << "had a fatal failure.";
-  }
-
-  void TearDown() override {
-    ADD_FAILURE() << "UNEXPECTED failure in TearDown().  "
-                  << "We should never get here, as the test fixture c'tor "
-                  << "had a fatal failure.";
-  }
-
- private:
-  void Init() {
-    FAIL() << "Expected failure #1, in the test fixture c'tor.";
-  }
-};
-
-TEST_F(FatalFailureInFixtureConstructorTest, FailureInConstructor) {
-  ADD_FAILURE() << "UNEXPECTED failure in the test body.  "
-                << "We should never get here, as the test fixture c'tor "
-                << "had a fatal failure.";
-}
-
-// Tests non-fatal failures in SetUp().
-class NonFatalFailureInSetUpTest : public testing::Test {
- protected:
-  ~NonFatalFailureInSetUpTest() override { Deinit(); }
-
-  void SetUp() override {
-    printf("(expecting 4 failures)\n");
-    ADD_FAILURE() << "Expected failure #1, in SetUp().";
-  }
-
-  void TearDown() override { FAIL() << "Expected failure #3, in TearDown()."; }
-
- private:
-  void Deinit() {
-    FAIL() << "Expected failure #4, in the test fixture d'tor.";
-  }
-};
-
-TEST_F(NonFatalFailureInSetUpTest, FailureInSetUp) {
-  FAIL() << "Expected failure #2, in the test function.";
-}
-
-// Tests fatal failures in SetUp().
-class FatalFailureInSetUpTest : public testing::Test {
- protected:
-  ~FatalFailureInSetUpTest() override { Deinit(); }
-
-  void SetUp() override {
-    printf("(expecting 3 failures)\n");
-    FAIL() << "Expected failure #1, in SetUp().";
-  }
-
-  void TearDown() override { FAIL() << "Expected failure #2, in TearDown()."; }
-
- private:
-  void Deinit() {
-    FAIL() << "Expected failure #3, in the test fixture d'tor.";
-  }
-};
-
-TEST_F(FatalFailureInSetUpTest, FailureInSetUp) {
-  FAIL() << "UNEXPECTED failure in the test function.  "
-         << "We should never get here, as SetUp() failed.";
-}
-
-TEST(AddFailureAtTest, MessageContainsSpecifiedFileAndLineNumber) {
-  ADD_FAILURE_AT("foo.cc", 42) << "Expected nonfatal failure in foo.cc";
-}
-
-TEST(GtestFailAtTest, MessageContainsSpecifiedFileAndLineNumber) {
-  GTEST_FAIL_AT("foo.cc", 42) << "Expected fatal failure in foo.cc";
-}
-
-#if GTEST_IS_THREADSAFE
-
-// A unary function that may die.
-void DieIf(bool should_die) {
-  GTEST_CHECK_(!should_die) << " - death inside DieIf().";
-}
-
-// Tests running death tests in a multi-threaded context.
-
-// Used for coordination between the main and the spawn thread.
-struct SpawnThreadNotifications {
-  SpawnThreadNotifications() {}
-
-  Notification spawn_thread_started;
-  Notification spawn_thread_ok_to_terminate;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SpawnThreadNotifications);
-};
-
-// The function to be executed in the thread spawn by the
-// MultipleThreads test (below).
-static void ThreadRoutine(SpawnThreadNotifications* notifications) {
-  // Signals the main thread that this thread has started.
-  notifications->spawn_thread_started.Notify();
-
-  // Waits for permission to finish from the main thread.
-  notifications->spawn_thread_ok_to_terminate.WaitForNotification();
-}
-
-// This is a death-test test, but it's not named with a DeathTest
-// suffix.  It starts threads which might interfere with later
-// death tests, so it must run after all other death tests.
-class DeathTestAndMultiThreadsTest : public testing::Test {
- protected:
-  // Starts a thread and waits for it to begin.
-  void SetUp() override {
-    thread_.reset(new ThreadWithParam<SpawnThreadNotifications*>(
-        &ThreadRoutine, &notifications_, nullptr));
-    notifications_.spawn_thread_started.WaitForNotification();
-  }
-  // Tells the thread to finish, and reaps it.
-  // Depending on the version of the thread library in use,
-  // a manager thread might still be left running that will interfere
-  // with later death tests.  This is unfortunate, but this class
-  // cleans up after itself as best it can.
-  void TearDown() override {
-    notifications_.spawn_thread_ok_to_terminate.Notify();
-  }
-
- private:
-  SpawnThreadNotifications notifications_;
-  std::unique_ptr<ThreadWithParam<SpawnThreadNotifications*> > thread_;
-};
-
-#endif  // GTEST_IS_THREADSAFE
-
-// The MixedUpTestSuiteTest test case verifies that Google Test will fail a
-// test if it uses a different fixture class than what other tests in
-// the same test case use.  It deliberately contains two fixture
-// classes with the same name but defined in different namespaces.
-
-// The MixedUpTestSuiteWithSameTestNameTest test case verifies that
-// when the user defines two tests with the same test case name AND
-// same test name (but in different namespaces), the second test will
-// fail.
-
-namespace foo {
-
-class MixedUpTestSuiteTest : public testing::Test {
-};
-
-TEST_F(MixedUpTestSuiteTest, FirstTestFromNamespaceFoo) {}
-TEST_F(MixedUpTestSuiteTest, SecondTestFromNamespaceFoo) {}
-
-class MixedUpTestSuiteWithSameTestNameTest : public testing::Test {
-};
-
-TEST_F(MixedUpTestSuiteWithSameTestNameTest,
-       TheSecondTestWithThisNameShouldFail) {}
-
-}  // namespace foo
-
-namespace bar {
-
-class MixedUpTestSuiteTest : public testing::Test {
-};
-
-// The following two tests are expected to fail.  We rely on the
-// golden file to check that Google Test generates the right error message.
-TEST_F(MixedUpTestSuiteTest, ThisShouldFail) {}
-TEST_F(MixedUpTestSuiteTest, ThisShouldFailToo) {}
-
-class MixedUpTestSuiteWithSameTestNameTest : public testing::Test {
-};
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST_F(MixedUpTestSuiteWithSameTestNameTest,
-       TheSecondTestWithThisNameShouldFail) {}
-
-}  // namespace bar
-
-// The following two test cases verify that Google Test catches the user
-// error of mixing TEST and TEST_F in the same test case.  The first
-// test case checks the scenario where TEST_F appears before TEST, and
-// the second one checks where TEST appears before TEST_F.
-
-class TEST_F_before_TEST_in_same_test_case : public testing::Test {
-};
-
-TEST_F(TEST_F_before_TEST_in_same_test_case, DefinedUsingTEST_F) {}
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST(TEST_F_before_TEST_in_same_test_case, DefinedUsingTESTAndShouldFail) {}
-
-class TEST_before_TEST_F_in_same_test_case : public testing::Test {
-};
-
-TEST(TEST_before_TEST_F_in_same_test_case, DefinedUsingTEST) {}
-
-// Expected to fail.  We rely on the golden file to check that Google Test
-// generates the right error message.
-TEST_F(TEST_before_TEST_F_in_same_test_case, DefinedUsingTEST_FAndShouldFail) {
-}
-
-// Used for testing EXPECT_NONFATAL_FAILURE() and EXPECT_FATAL_FAILURE().
-int global_integer = 0;
-
-// Tests that EXPECT_NONFATAL_FAILURE() can reference global variables.
-TEST(ExpectNonfatalFailureTest, CanReferenceGlobalVariables) {
-  global_integer = 0;
-  EXPECT_NONFATAL_FAILURE({
-    EXPECT_EQ(1, global_integer) << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() can reference local variables
-// (static or not).
-TEST(ExpectNonfatalFailureTest, CanReferenceLocalVariables) {
-  int m = 0;
-  static int n;
-  n = 1;
-  EXPECT_NONFATAL_FAILURE({
-    EXPECT_EQ(m, n) << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() succeeds when there is exactly
-// one non-fatal failure and no fatal failure.
-TEST(ExpectNonfatalFailureTest, SucceedsWhenThereIsOneNonfatalFailure) {
-  EXPECT_NONFATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }, "Expected non-fatal failure.");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there is no
-// non-fatal failure.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereIsNoNonfatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there are two
-// non-fatal failures.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereAreTwoNonfatalFailures) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure 1.";
-    ADD_FAILURE() << "Expected non-fatal failure 2.";
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when there is one fatal
-// failure.
-TEST(ExpectNonfatalFailureTest, FailsWhenThereIsOneFatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    FAIL() << "Expected fatal failure.";
-  }, "");
-}
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when the statement being
-// tested returns.
-TEST(ExpectNonfatalFailureTest, FailsWhenStatementReturns) {
-  printf("(expecting a failure)\n");
-  EXPECT_NONFATAL_FAILURE({
-    return;
-  }, "");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_NONFATAL_FAILURE() fails when the statement being
-// tested throws.
-TEST(ExpectNonfatalFailureTest, FailsWhenStatementThrows) {
-  printf("(expecting a failure)\n");
-  try {
-    EXPECT_NONFATAL_FAILURE({
-      throw 0;
-    }, "");
-  } catch(int) {  // NOLINT
-  }
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_FATAL_FAILURE() can reference global variables.
-TEST(ExpectFatalFailureTest, CanReferenceGlobalVariables) {
-  global_integer = 0;
-  EXPECT_FATAL_FAILURE({
-    ASSERT_EQ(1, global_integer) << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() can reference local static
-// variables.
-TEST(ExpectFatalFailureTest, CanReferenceLocalStaticVariables) {
-  static int n;
-  n = 1;
-  EXPECT_FATAL_FAILURE({
-    ASSERT_EQ(0, n) << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() succeeds when there is exactly
-// one fatal failure and no non-fatal failure.
-TEST(ExpectFatalFailureTest, SucceedsWhenThereIsOneFatalFailure) {
-  EXPECT_FATAL_FAILURE({
-    FAIL() << "Expected fatal failure.";
-  }, "Expected fatal failure.");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there is no fatal
-// failure.
-TEST(ExpectFatalFailureTest, FailsWhenThereIsNoFatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-  }, "");
-}
-
-// A helper for generating a fatal failure.
-void FatalFailure() {
-  FAIL() << "Expected fatal failure.";
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there are two
-// fatal failures.
-TEST(ExpectFatalFailureTest, FailsWhenThereAreTwoFatalFailures) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    FatalFailure();
-    FatalFailure();
-  }, "");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when there is one non-fatal
-// failure.
-TEST(ExpectFatalFailureTest, FailsWhenThereIsOneNonfatalFailure) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }, "");
-}
-
-// Tests that EXPECT_FATAL_FAILURE() fails when the statement being
-// tested returns.
-TEST(ExpectFatalFailureTest, FailsWhenStatementReturns) {
-  printf("(expecting a failure)\n");
-  EXPECT_FATAL_FAILURE({
-    return;
-  }, "");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests that EXPECT_FATAL_FAILURE() fails when the statement being
-// tested throws.
-TEST(ExpectFatalFailureTest, FailsWhenStatementThrows) {
-  printf("(expecting a failure)\n");
-  try {
-    EXPECT_FATAL_FAILURE({
-      throw 0;
-    }, "");
-  } catch(int) {  // NOLINT
-  }
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// This #ifdef block tests the output of value-parameterized tests.
-
-std::string ParamNameFunc(const testing::TestParamInfo<std::string>& info) {
-  return info.param;
-}
-
-class ParamTest : public testing::TestWithParam<std::string> {
-};
-
-TEST_P(ParamTest, Success) {
-  EXPECT_EQ("a", GetParam());
-}
-
-TEST_P(ParamTest, Failure) {
-  EXPECT_EQ("b", GetParam()) << "Expected failure";
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintingStrings,
-                         ParamTest,
-                         testing::Values(std::string("a")),
-                         ParamNameFunc);
-
-// This #ifdef block tests the output of typed tests.
-#if GTEST_HAS_TYPED_TEST
-
-template <typename T>
-class TypedTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE(TypedTest, testing::Types<int>);
-
-TYPED_TEST(TypedTest, Success) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-TYPED_TEST(TypedTest, Failure) {
-  EXPECT_EQ(1, TypeParam()) << "Expected failure";
-}
-
-typedef testing::Types<char, int> TypesForTestWithNames;
-
-template <typename T>
-class TypedTestWithNames : public testing::Test {};
-
-class TypedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value)
-      return std::string("char") + ::testing::PrintToString(i);
-    if (std::is_same<T, int>::value)
-      return std::string("int") + ::testing::PrintToString(i);
-  }
-};
-
-TYPED_TEST_SUITE(TypedTestWithNames, TypesForTestWithNames, TypedTestNames);
-
-TYPED_TEST(TypedTestWithNames, Success) {}
-
-TYPED_TEST(TypedTestWithNames, Failure) { FAIL(); }
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-// This #ifdef block tests the output of type-parameterized tests.
-#if GTEST_HAS_TYPED_TEST_P
-
-template <typename T>
-class TypedTestP : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP);
-
-TYPED_TEST_P(TypedTestP, Success) {
-  EXPECT_EQ(0U, TypeParam());
-}
-
-TYPED_TEST_P(TypedTestP, Failure) {
-  EXPECT_EQ(1U, TypeParam()) << "Expected failure";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP, Success, Failure);
-
-typedef testing::Types<unsigned char, unsigned int> UnsignedTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(Unsigned, TypedTestP, UnsignedTypes);
-
-class TypedTestPNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, unsigned char>::value) {
-      return std::string("unsignedChar") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, unsigned int>::value) {
-      return std::string("unsignedInt") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-INSTANTIATE_TYPED_TEST_SUITE_P(UnsignedCustomName, TypedTestP, UnsignedTypes,
-                              TypedTestPNames);
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-#if GTEST_HAS_DEATH_TEST
-
-// We rely on the golden file to verify that tests whose test case
-// name ends with DeathTest are run first.
-
-TEST(ADeathTest, ShouldRunFirst) {
-}
-
-# if GTEST_HAS_TYPED_TEST
-
-// We rely on the golden file to verify that typed tests whose test
-// case name ends with DeathTest are run first.
-
-template <typename T>
-class ATypedDeathTest : public testing::Test {
-};
-
-typedef testing::Types<int, double> NumericTypes;
-TYPED_TEST_SUITE(ATypedDeathTest, NumericTypes);
-
-TYPED_TEST(ATypedDeathTest, ShouldRunFirst) {
-}
-
-# endif  // GTEST_HAS_TYPED_TEST
-
-# if GTEST_HAS_TYPED_TEST_P
-
-
-// We rely on the golden file to verify that type-parameterized tests
-// whose test case name ends with DeathTest are run first.
-
-template <typename T>
-class ATypeParamDeathTest : public testing::Test {
-};
-
-TYPED_TEST_SUITE_P(ATypeParamDeathTest);
-
-TYPED_TEST_P(ATypeParamDeathTest, ShouldRunFirst) {
-}
-
-REGISTER_TYPED_TEST_SUITE_P(ATypeParamDeathTest, ShouldRunFirst);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, ATypeParamDeathTest, NumericTypes);
-
-# endif  // GTEST_HAS_TYPED_TEST_P
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Tests various failure conditions of
-// EXPECT_{,NON}FATAL_FAILURE{,_ON_ALL_THREADS}.
-class ExpectFailureTest : public testing::Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  enum FailureMode {
-    FATAL_FAILURE,
-    NONFATAL_FAILURE
-  };
-  static void AddFailure(FailureMode failure) {
-    if (failure == FATAL_FAILURE) {
-      FAIL() << "Expected fatal failure.";
-    } else {
-      ADD_FAILURE() << "Expected non-fatal failure.";
-    }
-  }
-};
-
-TEST_F(ExpectFailureTest, ExpectFatalFailure) {
-  // Expected fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(SUCCEED(), "Expected fatal failure.");
-  // Expected fatal failure, but got a non-fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(AddFailure(NONFATAL_FAILURE), "Expected non-fatal "
-                       "failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE(AddFailure(FATAL_FAILURE), "Some other fatal failure "
-                       "expected.");
-}
-
-TEST_F(ExpectFailureTest, ExpectNonFatalFailure) {
-  // Expected non-fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(SUCCEED(), "Expected non-fatal failure.");
-  // Expected non-fatal failure, but got a fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailure(FATAL_FAILURE), "Expected fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailure(NONFATAL_FAILURE), "Some other non-fatal "
-                          "failure.");
-}
-
-#if GTEST_IS_THREADSAFE
-
-class ExpectFailureWithThreadsTest : public ExpectFailureTest {
- protected:
-  static void AddFailureInOtherThread(FailureMode failure) {
-    ThreadWithParam<FailureMode> thread(&AddFailure, failure, nullptr);
-    thread.Join();
-  }
-};
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectFatalFailure) {
-  // We only intercept the current thread.
-  printf("(expecting 2 failures)\n");
-  EXPECT_FATAL_FAILURE(AddFailureInOtherThread(FATAL_FAILURE),
-                       "Expected fatal failure.");
-}
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectNonFatalFailure) {
-  // We only intercept the current thread.
-  printf("(expecting 2 failures)\n");
-  EXPECT_NONFATAL_FAILURE(AddFailureInOtherThread(NONFATAL_FAILURE),
-                          "Expected non-fatal failure.");
-}
-
-typedef ExpectFailureWithThreadsTest ScopedFakeTestPartResultReporterTest;
-
-// Tests that the ScopedFakeTestPartResultReporter only catches failures from
-// the current thread if it is instantiated with INTERCEPT_ONLY_CURRENT_THREAD.
-TEST_F(ScopedFakeTestPartResultReporterTest, InterceptOnlyCurrentThread) {
-  printf("(expecting 2 failures)\n");
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ONLY_CURRENT_THREAD,
-        &results);
-    AddFailureInOtherThread(FATAL_FAILURE);
-    AddFailureInOtherThread(NONFATAL_FAILURE);
-  }
-  // The two failures should not have been intercepted.
-  EXPECT_EQ(0, results.size()) << "This shouldn't fail.";
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-TEST_F(ExpectFailureTest, ExpectFatalFailureOnAllThreads) {
-  // Expected fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(SUCCEED(), "Expected fatal failure.");
-  // Expected fatal failure, but got a non-fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailure(NONFATAL_FAILURE),
-                                      "Expected non-fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailure(FATAL_FAILURE),
-                                      "Some other fatal failure expected.");
-}
-
-TEST_F(ExpectFailureTest, ExpectNonFatalFailureOnAllThreads) {
-  // Expected non-fatal failure, but succeeds.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(SUCCEED(), "Expected non-fatal "
-                                         "failure.");
-  // Expected non-fatal failure, but got a fatal failure.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddFailure(FATAL_FAILURE),
-                                         "Expected fatal failure.");
-  // Wrong message.
-  printf("(expecting 1 failure)\n");
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddFailure(NONFATAL_FAILURE),
-                                         "Some other non-fatal failure.");
-}
-
-class DynamicFixture : public testing::Test {
- protected:
-  DynamicFixture() { printf("DynamicFixture()\n"); }
-  ~DynamicFixture() override { printf("~DynamicFixture()\n"); }
-  void SetUp() override { printf("DynamicFixture::SetUp\n"); }
-  void TearDown() override { printf("DynamicFixture::TearDown\n"); }
-
-  static void SetUpTestSuite() { printf("DynamicFixture::SetUpTestSuite\n"); }
-  static void TearDownTestSuite() {
-    printf("DynamicFixture::TearDownTestSuite\n");
-  }
-};
-
-template <bool Pass>
-class DynamicTest : public DynamicFixture {
- public:
-  void TestBody() override { EXPECT_TRUE(Pass); }
-};
-
-auto dynamic_test = (
-    // Register two tests with the same fixture correctly.
-    testing::RegisterTest(
-        "DynamicFixture", "DynamicTestPass", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest(
-        "DynamicFixture", "DynamicTestFail", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<false>; }),
-
-    // Register the same fixture with another name. That's fine.
-    testing::RegisterTest(
-        "DynamicFixtureAnotherName", "DynamicTestPass", nullptr, nullptr,
-        __FILE__, __LINE__,
-        []() -> DynamicFixture* { return new DynamicTest<true>; }),
-
-    // Register two tests with the same fixture incorrectly.
-    testing::RegisterTest(
-        "BadDynamicFixture1", "FixtureBase", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest(
-        "BadDynamicFixture1", "TestBase", nullptr, nullptr, __FILE__, __LINE__,
-        []() -> testing::Test* { return new DynamicTest<true>; }),
-
-    // Register two tests with the same fixture incorrectly by ommiting the
-    // return type.
-    testing::RegisterTest(
-        "BadDynamicFixture2", "FixtureBase", nullptr, nullptr, __FILE__,
-        __LINE__, []() -> DynamicFixture* { return new DynamicTest<true>; }),
-    testing::RegisterTest("BadDynamicFixture2", "Derived", nullptr, nullptr,
-                          __FILE__, __LINE__,
-                          []() { return new DynamicTest<true>; }));
-
-// Two test environments for testing testing::AddGlobalTestEnvironment().
-
-class FooEnvironment : public testing::Environment {
- public:
-  void SetUp() override { printf("%s", "FooEnvironment::SetUp() called.\n"); }
-
-  void TearDown() override {
-    printf("%s", "FooEnvironment::TearDown() called.\n");
-    FAIL() << "Expected fatal failure.";
-  }
-};
-
-class BarEnvironment : public testing::Environment {
- public:
-  void SetUp() override { printf("%s", "BarEnvironment::SetUp() called.\n"); }
-
-  void TearDown() override {
-    printf("%s", "BarEnvironment::TearDown() called.\n");
-    ADD_FAILURE() << "Expected non-fatal failure.";
-  }
-};
-
-// The main function.
-//
-// The idea is to use Google Test to run all the tests we have defined (some
-// of them are intended to fail), and then compare the test results
-// with the "golden" file.
-int main(int argc, char **argv) {
-  testing::GTEST_FLAG(print_time) = false;
-
-  // We just run the tests, knowing some of them are intended to fail.
-  // We will use a separate Python script to compare the output of
-  // this program with the golden file.
-
-  // It's hard to test InitGoogleTest() directly, as it has many
-  // global side effects.  The following line serves as a sanity test
-  // for it.
-  testing::InitGoogleTest(&argc, argv);
-  bool internal_skip_environment_and_ad_hoc_tests =
-      std::count(argv, argv + argc,
-                 std::string("internal_skip_environment_and_ad_hoc_tests")) > 0;
-
-#if GTEST_HAS_DEATH_TEST
-  if (testing::internal::GTEST_FLAG(internal_run_death_test) != "") {
-    // Skip the usual output capturing if we're running as the child
-    // process of an threadsafe-style death test.
-# if GTEST_OS_WINDOWS
-    posix::FReopen("nul:", "w", stdout);
-# else
-    posix::FReopen("/dev/null", "w", stdout);
-# endif  // GTEST_OS_WINDOWS
-    return RUN_ALL_TESTS();
-  }
-#endif  // GTEST_HAS_DEATH_TEST
-
-  if (internal_skip_environment_and_ad_hoc_tests)
-    return RUN_ALL_TESTS();
-
-  // Registers two global test environments.
-  // The golden file verifies that they are set up in the order they
-  // are registered, and torn down in the reverse order.
-  testing::AddGlobalTestEnvironment(new FooEnvironment);
-  testing::AddGlobalTestEnvironment(new BarEnvironment);
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4127
-#endif  //  _MSC_VER
-  return RunAllTests();
-}
diff --git a/3rdparty/gtest/test/googletest-param-test-invalid-name1-test.py b/3rdparty/gtest/test/googletest-param-test-invalid-name1-test.py
deleted file mode 100644
index 2a08477a..00000000
--- a/3rdparty/gtest/test/googletest-param-test-invalid-name1-test.py
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2015 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-binary_name = 'googletest-param-test-invalid-name1-test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  err = ('Parameterized test name \'"InvalidWithQuotes"\' is invalid')
-
-  p = gtest_test_utils.Subprocess(command)
-  Assert(p.terminated_by_signal)
-
-  # Verify the output message contains appropriate output
-  Assert(err in p.output)
-
-
-class GTestParamTestInvalidName1Test(gtest_test_utils.TestCase):
-
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-param-test-invalid-name1-test_.cc b/3rdparty/gtest/test/googletest-param-test-invalid-name1-test_.cc
deleted file mode 100644
index 955d6999..00000000
--- a/3rdparty/gtest/test/googletest-param-test-invalid-name1-test_.cc
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-namespace {
-class DummyTest : public ::testing::TestWithParam<const char *> {};
-
-TEST_P(DummyTest, Dummy) {
-}
-
-INSTANTIATE_TEST_SUITE_P(InvalidTestName,
-                         DummyTest,
-                         ::testing::Values("InvalidWithQuotes"),
-                         ::testing::PrintToStringParamName());
-
-}  // namespace
-
-int main(int argc, char *argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-
diff --git a/3rdparty/gtest/test/googletest-param-test-invalid-name2-test.py b/3rdparty/gtest/test/googletest-param-test-invalid-name2-test.py
deleted file mode 100644
index ab838f46..00000000
--- a/3rdparty/gtest/test/googletest-param-test-invalid-name2-test.py
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2015 Google Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-binary_name = 'googletest-param-test-invalid-name2-test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  err = ('Duplicate parameterized test name \'a\'')
-
-  p = gtest_test_utils.Subprocess(command)
-  Assert(p.terminated_by_signal)
-
-  # Check for appropriate output
-  Assert(err in p.output)
-
-
-class GTestParamTestInvalidName2Test(gtest_test_utils.TestCase):
-
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-param-test-invalid-name2-test_.cc b/3rdparty/gtest/test/googletest-param-test-invalid-name2-test_.cc
deleted file mode 100644
index 76371df5..00000000
--- a/3rdparty/gtest/test/googletest-param-test-invalid-name2-test_.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2015, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-namespace {
-class DummyTest : public ::testing::TestWithParam<const char *> {};
-
-std::string StringParamTestSuffix(
-    const testing::TestParamInfo<const char*>& info) {
-  return std::string(info.param);
-}
-
-TEST_P(DummyTest, Dummy) {
-}
-
-INSTANTIATE_TEST_SUITE_P(DuplicateTestNames,
-                         DummyTest,
-                         ::testing::Values("a", "b", "a", "c"),
-                         StringParamTestSuffix);
-}  // namespace
-
-int main(int argc, char *argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-
-
diff --git a/3rdparty/gtest/test/googletest-param-test-test.cc b/3rdparty/gtest/test/googletest-param-test-test.cc
deleted file mode 100644
index 6c187dff..00000000
--- a/3rdparty/gtest/test/googletest-param-test-test.cc
+++ /dev/null
@@ -1,1055 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself. This file verifies that the parameter
-// generators objects produce correct parameter sequences and that
-// Google Test runtime instantiates correct tests from those sequences.
-
-#include "gtest/gtest.h"
-
-# include <algorithm>
-# include <iostream>
-# include <list>
-# include <sstream>
-# include <string>
-# include <vector>
-
-# include "src/gtest-internal-inl.h"  // for UnitTestOptions
-# include "test/googletest-param-test-test.h"
-
-using ::std::vector;
-using ::std::sort;
-
-using ::testing::AddGlobalTestEnvironment;
-using ::testing::Bool;
-using ::testing::Combine;
-using ::testing::Message;
-using ::testing::Range;
-using ::testing::TestWithParam;
-using ::testing::Values;
-using ::testing::ValuesIn;
-
-using ::testing::internal::ParamGenerator;
-using ::testing::internal::UnitTestOptions;
-
-// Prints a value to a string.
-//
-// FIXME: remove PrintValue() when we move matchers and
-// EXPECT_THAT() from Google Mock to Google Test.  At that time, we
-// can write EXPECT_THAT(x, Eq(y)) to compare two tuples x and y, as
-// EXPECT_THAT() and the matchers know how to print tuples.
-template <typename T>
-::std::string PrintValue(const T& value) {
-  return testing::PrintToString(value);
-}
-
-// Verifies that a sequence generated by the generator and accessed
-// via the iterator object matches the expected one using Google Test
-// assertions.
-template <typename T, size_t N>
-void VerifyGenerator(const ParamGenerator<T>& generator,
-                     const T (&expected_values)[N]) {
-  typename ParamGenerator<T>::iterator it = generator.begin();
-  for (size_t i = 0; i < N; ++i) {
-    ASSERT_FALSE(it == generator.end())
-        << "At element " << i << " when accessing via an iterator "
-        << "created with the copy constructor.\n";
-    // We cannot use EXPECT_EQ() here as the values may be tuples,
-    // which don't support <<.
-    EXPECT_TRUE(expected_values[i] == *it)
-        << "where i is " << i
-        << ", expected_values[i] is " << PrintValue(expected_values[i])
-        << ", *it is " << PrintValue(*it)
-        << ", and 'it' is an iterator created with the copy constructor.\n";
-    ++it;
-  }
-  EXPECT_TRUE(it == generator.end())
-        << "At the presumed end of sequence when accessing via an iterator "
-        << "created with the copy constructor.\n";
-
-  // Test the iterator assignment. The following lines verify that
-  // the sequence accessed via an iterator initialized via the
-  // assignment operator (as opposed to a copy constructor) matches
-  // just the same.
-  it = generator.begin();
-  for (size_t i = 0; i < N; ++i) {
-    ASSERT_FALSE(it == generator.end())
-        << "At element " << i << " when accessing via an iterator "
-        << "created with the assignment operator.\n";
-    EXPECT_TRUE(expected_values[i] == *it)
-        << "where i is " << i
-        << ", expected_values[i] is " << PrintValue(expected_values[i])
-        << ", *it is " << PrintValue(*it)
-        << ", and 'it' is an iterator created with the copy constructor.\n";
-    ++it;
-  }
-  EXPECT_TRUE(it == generator.end())
-        << "At the presumed end of sequence when accessing via an iterator "
-        << "created with the assignment operator.\n";
-}
-
-template <typename T>
-void VerifyGeneratorIsEmpty(const ParamGenerator<T>& generator) {
-  typename ParamGenerator<T>::iterator it = generator.begin();
-  EXPECT_TRUE(it == generator.end());
-
-  it = generator.begin();
-  EXPECT_TRUE(it == generator.end());
-}
-
-// Generator tests. They test that each of the provided generator functions
-// generates an expected sequence of values. The general test pattern
-// instantiates a generator using one of the generator functions,
-// checks the sequence produced by the generator using its iterator API,
-// and then resets the iterator back to the beginning of the sequence
-// and checks the sequence again.
-
-// Tests that iterators produced by generator functions conform to the
-// ForwardIterator concept.
-TEST(IteratorTest, ParamIteratorConformsToForwardIteratorConcept) {
-  const ParamGenerator<int> gen = Range(0, 10);
-  ParamGenerator<int>::iterator it = gen.begin();
-
-  // Verifies that iterator initialization works as expected.
-  ParamGenerator<int>::iterator it2 = it;
-  EXPECT_TRUE(*it == *it2) << "Initialized iterators must point to the "
-                           << "element same as its source points to";
-
-  // Verifies that iterator assignment works as expected.
-  ++it;
-  EXPECT_FALSE(*it == *it2);
-  it2 = it;
-  EXPECT_TRUE(*it == *it2) << "Assigned iterators must point to the "
-                           << "element same as its source points to";
-
-  // Verifies that prefix operator++() returns *this.
-  EXPECT_EQ(&it, &(++it)) << "Result of the prefix operator++ must be "
-                          << "refer to the original object";
-
-  // Verifies that the result of the postfix operator++ points to the value
-  // pointed to by the original iterator.
-  int original_value = *it;  // Have to compute it outside of macro call to be
-                             // unaffected by the parameter evaluation order.
-  EXPECT_EQ(original_value, *(it++));
-
-  // Verifies that prefix and postfix operator++() advance an iterator
-  // all the same.
-  it2 = it;
-  ++it;
-  ++it2;
-  EXPECT_TRUE(*it == *it2);
-}
-
-// Tests that Range() generates the expected sequence.
-TEST(RangeTest, IntRangeWithDefaultStep) {
-  const ParamGenerator<int> gen = Range(0, 3);
-  const int expected_values[] = {0, 1, 2};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that Range() generates the single element sequence
-// as expected when provided with range limits that are equal.
-TEST(RangeTest, IntRangeSingleValue) {
-  const ParamGenerator<int> gen = Range(0, 1);
-  const int expected_values[] = {0};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that Range() with generates empty sequence when
-// supplied with an empty range.
-TEST(RangeTest, IntRangeEmpty) {
-  const ParamGenerator<int> gen = Range(0, 0);
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that Range() with custom step (greater then one) generates
-// the expected sequence.
-TEST(RangeTest, IntRangeWithCustomStep) {
-  const ParamGenerator<int> gen = Range(0, 9, 3);
-  const int expected_values[] = {0, 3, 6};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Range() with custom step (greater then one) generates
-// the expected sequence when the last element does not fall on the
-// upper range limit. Sequences generated by Range() must not have
-// elements beyond the range limits.
-TEST(RangeTest, IntRangeWithCustomStepOverUpperBound) {
-  const ParamGenerator<int> gen = Range(0, 4, 3);
-  const int expected_values[] = {0, 3};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Verifies that Range works with user-defined types that define
-// copy constructor, operator=(), operator+(), and operator<().
-class DogAdder {
- public:
-  explicit DogAdder(const char* a_value) : value_(a_value) {}
-  DogAdder(const DogAdder& other) : value_(other.value_.c_str()) {}
-
-  DogAdder operator=(const DogAdder& other) {
-    if (this != &other)
-      value_ = other.value_;
-    return *this;
-  }
-  DogAdder operator+(const DogAdder& other) const {
-    Message msg;
-    msg << value_.c_str() << other.value_.c_str();
-    return DogAdder(msg.GetString().c_str());
-  }
-  bool operator<(const DogAdder& other) const {
-    return value_ < other.value_;
-  }
-  const std::string& value() const { return value_; }
-
- private:
-  std::string value_;
-};
-
-TEST(RangeTest, WorksWithACustomType) {
-  const ParamGenerator<DogAdder> gen =
-      Range(DogAdder("cat"), DogAdder("catdogdog"), DogAdder("dog"));
-  ParamGenerator<DogAdder>::iterator it = gen.begin();
-
-  ASSERT_FALSE(it == gen.end());
-  EXPECT_STREQ("cat", it->value().c_str());
-
-  ASSERT_FALSE(++it == gen.end());
-  EXPECT_STREQ("catdog", it->value().c_str());
-
-  EXPECT_TRUE(++it == gen.end());
-}
-
-class IntWrapper {
- public:
-  explicit IntWrapper(int a_value) : value_(a_value) {}
-  IntWrapper(const IntWrapper& other) : value_(other.value_) {}
-
-  IntWrapper operator=(const IntWrapper& other) {
-    value_ = other.value_;
-    return *this;
-  }
-  // operator+() adds a different type.
-  IntWrapper operator+(int other) const { return IntWrapper(value_ + other); }
-  bool operator<(const IntWrapper& other) const {
-    return value_ < other.value_;
-  }
-  int value() const { return value_; }
-
- private:
-  int value_;
-};
-
-TEST(RangeTest, WorksWithACustomTypeWithDifferentIncrementType) {
-  const ParamGenerator<IntWrapper> gen = Range(IntWrapper(0), IntWrapper(2));
-  ParamGenerator<IntWrapper>::iterator it = gen.begin();
-
-  ASSERT_FALSE(it == gen.end());
-  EXPECT_EQ(0, it->value());
-
-  ASSERT_FALSE(++it == gen.end());
-  EXPECT_EQ(1, it->value());
-
-  EXPECT_TRUE(++it == gen.end());
-}
-
-// Tests that ValuesIn() with an array parameter generates
-// the expected sequence.
-TEST(ValuesInTest, ValuesInArray) {
-  int array[] = {3, 5, 8};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Tests that ValuesIn() with a const array parameter generates
-// the expected sequence.
-TEST(ValuesInTest, ValuesInConstArray) {
-  const int array[] = {3, 5, 8};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Edge case. Tests that ValuesIn() with an array parameter containing a
-// single element generates the single element sequence.
-TEST(ValuesInTest, ValuesInSingleElementArray) {
-  int array[] = {42};
-  const ParamGenerator<int> gen = ValuesIn(array);
-  VerifyGenerator(gen, array);
-}
-
-// Tests that ValuesIn() generates the expected sequence for an STL
-// container (vector).
-TEST(ValuesInTest, ValuesInVector) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(3);
-  values.push_back(5);
-  values.push_back(8);
-  const ParamGenerator<int> gen = ValuesIn(values);
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that ValuesIn() generates the expected sequence.
-TEST(ValuesInTest, ValuesInIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(3);
-  values.push_back(5);
-  values.push_back(8);
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that ValuesIn() provided with an iterator range specifying a
-// single value generates a single-element sequence.
-TEST(ValuesInTest, ValuesInSingleElementIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  values.push_back(42);
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  const int expected_values[] = {42};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case. Tests that ValuesIn() provided with an empty iterator range
-// generates an empty sequence.
-TEST(ValuesInTest, ValuesInEmptyIteratorRange) {
-  typedef ::std::vector<int> ContainerType;
-  ContainerType values;
-  const ParamGenerator<int> gen = ValuesIn(values.begin(), values.end());
-
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that the Values() generates the expected sequence.
-TEST(ValuesTest, ValuesWorks) {
-  const ParamGenerator<int> gen = Values(3, 5, 8);
-
-  const int expected_values[] = {3, 5, 8};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Values() generates the expected sequences from elements of
-// different types convertible to ParamGenerator's parameter type.
-TEST(ValuesTest, ValuesWorksForValuesOfCompatibleTypes) {
-  const ParamGenerator<double> gen = Values(3, 5.0f, 8.0);
-
-  const double expected_values[] = {3.0, 5.0, 8.0};
-  VerifyGenerator(gen, expected_values);
-}
-
-TEST(ValuesTest, ValuesWorksForMaxLengthList) {
-  const ParamGenerator<int> gen = Values(
-      10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
-      110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
-      210, 220, 230, 240, 250, 260, 270, 280, 290, 300,
-      310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
-      410, 420, 430, 440, 450, 460, 470, 480, 490, 500);
-
-  const int expected_values[] = {
-      10, 20, 30, 40, 50, 60, 70, 80, 90, 100,
-      110, 120, 130, 140, 150, 160, 170, 180, 190, 200,
-      210, 220, 230, 240, 250, 260, 270, 280, 290, 300,
-      310, 320, 330, 340, 350, 360, 370, 380, 390, 400,
-      410, 420, 430, 440, 450, 460, 470, 480, 490, 500};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Edge case test. Tests that single-parameter Values() generates the sequence
-// with the single value.
-TEST(ValuesTest, ValuesWithSingleParameter) {
-  const ParamGenerator<int> gen = Values(42);
-
-  const int expected_values[] = {42};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Bool() generates sequence (false, true).
-TEST(BoolTest, BoolWorks) {
-  const ParamGenerator<bool> gen = Bool();
-
-  const bool expected_values[] = {false, true};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Combine() with two parameters generates the expected sequence.
-TEST(CombineTest, CombineWithTwoParameters) {
-  const char* foo = "foo";
-  const char* bar = "bar";
-  const ParamGenerator<std::tuple<const char*, int> > gen =
-      Combine(Values(foo, bar), Values(3, 4));
-
-  std::tuple<const char*, int> expected_values[] = {
-      std::make_tuple(foo, 3), std::make_tuple(foo, 4), std::make_tuple(bar, 3),
-      std::make_tuple(bar, 4)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that Combine() with three parameters generates the expected sequence.
-TEST(CombineTest, CombineWithThreeParameters) {
-  const ParamGenerator<std::tuple<int, int, int> > gen =
-      Combine(Values(0, 1), Values(3, 4), Values(5, 6));
-  std::tuple<int, int, int> expected_values[] = {
-      std::make_tuple(0, 3, 5), std::make_tuple(0, 3, 6),
-      std::make_tuple(0, 4, 5), std::make_tuple(0, 4, 6),
-      std::make_tuple(1, 3, 5), std::make_tuple(1, 3, 6),
-      std::make_tuple(1, 4, 5), std::make_tuple(1, 4, 6)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that the Combine() with the first parameter generating a single value
-// sequence generates a sequence with the number of elements equal to the
-// number of elements in the sequence generated by the second parameter.
-TEST(CombineTest, CombineWithFirstParameterSingleValue) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(42), Values(0, 1));
-
-  std::tuple<int, int> expected_values[] = {std::make_tuple(42, 0),
-                                            std::make_tuple(42, 1)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that the Combine() with the second parameter generating a single value
-// sequence generates a sequence with the number of elements equal to the
-// number of elements in the sequence generated by the first parameter.
-TEST(CombineTest, CombineWithSecondParameterSingleValue) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(0, 1), Values(42));
-
-  std::tuple<int, int> expected_values[] = {std::make_tuple(0, 42),
-                                            std::make_tuple(1, 42)};
-  VerifyGenerator(gen, expected_values);
-}
-
-// Tests that when the first parameter produces an empty sequence,
-// Combine() produces an empty sequence, too.
-TEST(CombineTest, CombineWithFirstParameterEmptyRange) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Range(0, 0), Values(0, 1));
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Tests that when the second parameter produces an empty sequence,
-// Combine() produces an empty sequence, too.
-TEST(CombineTest, CombineWithSecondParameterEmptyRange) {
-  const ParamGenerator<std::tuple<int, int> > gen =
-      Combine(Values(0, 1), Range(1, 1));
-  VerifyGeneratorIsEmpty(gen);
-}
-
-// Edge case. Tests that combine works with the maximum number
-// of parameters supported by Google Test (currently 10).
-TEST(CombineTest, CombineWithMaxNumberOfParameters) {
-  const char* foo = "foo";
-  const char* bar = "bar";
-  const ParamGenerator<
-      std::tuple<const char*, int, int, int, int, int, int, int, int, int> >
-      gen =
-          Combine(Values(foo, bar), Values(1), Values(2), Values(3), Values(4),
-                  Values(5), Values(6), Values(7), Values(8), Values(9));
-
-  std::tuple<const char*, int, int, int, int, int, int, int, int, int>
-      expected_values[] = {std::make_tuple(foo, 1, 2, 3, 4, 5, 6, 7, 8, 9),
-                           std::make_tuple(bar, 1, 2, 3, 4, 5, 6, 7, 8, 9)};
-  VerifyGenerator(gen, expected_values);
-}
-
-class NonDefaultConstructAssignString {
- public:
-  NonDefaultConstructAssignString(const std::string& s) : str_(s) {}
-
-  const std::string& str() const { return str_; }
-
- private:
-  std::string str_;
-
-  // Not default constructible
-  NonDefaultConstructAssignString();
-  // Not assignable
-  void operator=(const NonDefaultConstructAssignString&);
-};
-
-TEST(CombineTest, NonDefaultConstructAssign) {
-  const ParamGenerator<std::tuple<int, NonDefaultConstructAssignString> > gen =
-      Combine(Values(0, 1), Values(NonDefaultConstructAssignString("A"),
-                                   NonDefaultConstructAssignString("B")));
-
-  ParamGenerator<std::tuple<int, NonDefaultConstructAssignString> >::iterator
-      it = gen.begin();
-
-  EXPECT_EQ(0, std::get<0>(*it));
-  EXPECT_EQ("A", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(0, std::get<0>(*it));
-  EXPECT_EQ("B", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(1, std::get<0>(*it));
-  EXPECT_EQ("A", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_EQ(1, std::get<0>(*it));
-  EXPECT_EQ("B", std::get<1>(*it).str());
-  ++it;
-
-  EXPECT_TRUE(it == gen.end());
-}
-
-
-// Tests that an generator produces correct sequence after being
-// assigned from another generator.
-TEST(ParamGeneratorTest, AssignmentWorks) {
-  ParamGenerator<int> gen = Values(1, 2);
-  const ParamGenerator<int> gen2 = Values(3, 4);
-  gen = gen2;
-
-  const int expected_values[] = {3, 4};
-  VerifyGenerator(gen, expected_values);
-}
-
-// This test verifies that the tests are expanded and run as specified:
-// one test per element from the sequence produced by the generator
-// specified in INSTANTIATE_TEST_SUITE_P. It also verifies that the test's
-// fixture constructor, SetUp(), and TearDown() have run and have been
-// supplied with the correct parameters.
-
-// The use of environment object allows detection of the case where no test
-// case functionality is run at all. In this case TearDownTestSuite will not
-// be able to detect missing tests, naturally.
-template <int kExpectedCalls>
-class TestGenerationEnvironment : public ::testing::Environment {
- public:
-  static TestGenerationEnvironment* Instance() {
-    static TestGenerationEnvironment* instance = new TestGenerationEnvironment;
-    return instance;
-  }
-
-  void FixtureConstructorExecuted() { fixture_constructor_count_++; }
-  void SetUpExecuted() { set_up_count_++; }
-  void TearDownExecuted() { tear_down_count_++; }
-  void TestBodyExecuted() { test_body_count_++; }
-
-  void TearDown() override {
-    // If all MultipleTestGenerationTest tests have been de-selected
-    // by the filter flag, the following checks make no sense.
-    bool perform_check = false;
-
-    for (int i = 0; i < kExpectedCalls; ++i) {
-      Message msg;
-      msg << "TestsExpandedAndRun/" << i;
-      if (UnitTestOptions::FilterMatchesTest(
-             "TestExpansionModule/MultipleTestGenerationTest",
-              msg.GetString().c_str())) {
-        perform_check = true;
-      }
-    }
-    if (perform_check) {
-      EXPECT_EQ(kExpectedCalls, fixture_constructor_count_)
-          << "Fixture constructor of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, set_up_count_)
-          << "Fixture SetUp method of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, tear_down_count_)
-          << "Fixture TearDown method of ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-      EXPECT_EQ(kExpectedCalls, test_body_count_)
-          << "Test in ParamTestGenerationTest test case "
-          << "has not been run as expected.";
-    }
-  }
-
- private:
-  TestGenerationEnvironment() : fixture_constructor_count_(0), set_up_count_(0),
-                                tear_down_count_(0), test_body_count_(0) {}
-
-  int fixture_constructor_count_;
-  int set_up_count_;
-  int tear_down_count_;
-  int test_body_count_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestGenerationEnvironment);
-};
-
-const int test_generation_params[] = {36, 42, 72};
-
-class TestGenerationTest : public TestWithParam<int> {
- public:
-  enum {
-    PARAMETER_COUNT =
-        sizeof(test_generation_params)/sizeof(test_generation_params[0])
-  };
-
-  typedef TestGenerationEnvironment<PARAMETER_COUNT> Environment;
-
-  TestGenerationTest() {
-    Environment::Instance()->FixtureConstructorExecuted();
-    current_parameter_ = GetParam();
-  }
-  void SetUp() override {
-    Environment::Instance()->SetUpExecuted();
-    EXPECT_EQ(current_parameter_, GetParam());
-  }
-  void TearDown() override {
-    Environment::Instance()->TearDownExecuted();
-    EXPECT_EQ(current_parameter_, GetParam());
-  }
-
-  static void SetUpTestSuite() {
-    bool all_tests_in_test_case_selected = true;
-
-    for (int i = 0; i < PARAMETER_COUNT; ++i) {
-      Message test_name;
-      test_name << "TestsExpandedAndRun/" << i;
-      if ( !UnitTestOptions::FilterMatchesTest(
-                "TestExpansionModule/MultipleTestGenerationTest",
-                test_name.GetString())) {
-        all_tests_in_test_case_selected = false;
-      }
-    }
-    EXPECT_TRUE(all_tests_in_test_case_selected)
-        << "When running the TestGenerationTest test case all of its tests\n"
-        << "must be selected by the filter flag for the test case to pass.\n"
-        << "If not all of them are enabled, we can't reliably conclude\n"
-        << "that the correct number of tests have been generated.";
-
-    collected_parameters_.clear();
-  }
-
-  static void TearDownTestSuite() {
-    vector<int> expected_values(test_generation_params,
-                                test_generation_params + PARAMETER_COUNT);
-    // Test execution order is not guaranteed by Google Test,
-    // so the order of values in collected_parameters_ can be
-    // different and we have to sort to compare.
-    sort(expected_values.begin(), expected_values.end());
-    sort(collected_parameters_.begin(), collected_parameters_.end());
-
-    EXPECT_TRUE(collected_parameters_ == expected_values);
-  }
-
- protected:
-  int current_parameter_;
-  static vector<int> collected_parameters_;
-
- private:
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestGenerationTest);
-};
-vector<int> TestGenerationTest::collected_parameters_;
-
-TEST_P(TestGenerationTest, TestsExpandedAndRun) {
-  Environment::Instance()->TestBodyExecuted();
-  EXPECT_EQ(current_parameter_, GetParam());
-  collected_parameters_.push_back(GetParam());
-}
-INSTANTIATE_TEST_SUITE_P(TestExpansionModule, TestGenerationTest,
-                         ValuesIn(test_generation_params));
-
-// This test verifies that the element sequence (third parameter of
-// INSTANTIATE_TEST_SUITE_P) is evaluated in InitGoogleTest() and neither at
-// the call site of INSTANTIATE_TEST_SUITE_P nor in RUN_ALL_TESTS().  For
-// that, we declare param_value_ to be a static member of
-// GeneratorEvaluationTest and initialize it to 0.  We set it to 1 in
-// main(), just before invocation of InitGoogleTest().  After calling
-// InitGoogleTest(), we set the value to 2.  If the sequence is evaluated
-// before or after InitGoogleTest, INSTANTIATE_TEST_SUITE_P will create a
-// test with parameter other than 1, and the test body will fail the
-// assertion.
-class GeneratorEvaluationTest : public TestWithParam<int> {
- public:
-  static int param_value() { return param_value_; }
-  static void set_param_value(int param_value) { param_value_ = param_value; }
-
- private:
-  static int param_value_;
-};
-int GeneratorEvaluationTest::param_value_ = 0;
-
-TEST_P(GeneratorEvaluationTest, GeneratorsEvaluatedInMain) {
-  EXPECT_EQ(1, GetParam());
-}
-INSTANTIATE_TEST_SUITE_P(GenEvalModule, GeneratorEvaluationTest,
-                         Values(GeneratorEvaluationTest::param_value()));
-
-// Tests that generators defined in a different translation unit are
-// functional. Generator extern_gen is defined in gtest-param-test_test2.cc.
-extern ParamGenerator<int> extern_gen;
-class ExternalGeneratorTest : public TestWithParam<int> {};
-TEST_P(ExternalGeneratorTest, ExternalGenerator) {
-  // Sequence produced by extern_gen contains only a single value
-  // which we verify here.
-  EXPECT_EQ(GetParam(), 33);
-}
-INSTANTIATE_TEST_SUITE_P(ExternalGeneratorModule, ExternalGeneratorTest,
-                         extern_gen);
-
-// Tests that a parameterized test case can be defined in one translation
-// unit and instantiated in another. This test will be instantiated in
-// gtest-param-test_test2.cc. ExternalInstantiationTest fixture class is
-// defined in gtest-param-test_test.h.
-TEST_P(ExternalInstantiationTest, IsMultipleOf33) {
-  EXPECT_EQ(0, GetParam() % 33);
-}
-
-// Tests that a parameterized test case can be instantiated with multiple
-// generators.
-class MultipleInstantiationTest : public TestWithParam<int> {};
-TEST_P(MultipleInstantiationTest, AllowsMultipleInstances) {
-}
-INSTANTIATE_TEST_SUITE_P(Sequence1, MultipleInstantiationTest, Values(1, 2));
-INSTANTIATE_TEST_SUITE_P(Sequence2, MultipleInstantiationTest, Range(3, 5));
-
-// Tests that a parameterized test case can be instantiated
-// in multiple translation units. This test will be instantiated
-// here and in gtest-param-test_test2.cc.
-// InstantiationInMultipleTranslationUnitsTest fixture class
-// is defined in gtest-param-test_test.h.
-TEST_P(InstantiationInMultipleTranslationUnitsTest, IsMultipleOf42) {
-  EXPECT_EQ(0, GetParam() % 42);
-}
-INSTANTIATE_TEST_SUITE_P(Sequence1, InstantiationInMultipleTranslationUnitsTest,
-                         Values(42, 42 * 2));
-
-// Tests that each iteration of parameterized test runs in a separate test
-// object.
-class SeparateInstanceTest : public TestWithParam<int> {
- public:
-  SeparateInstanceTest() : count_(0) {}
-
-  static void TearDownTestSuite() {
-    EXPECT_GE(global_count_, 2)
-        << "If some (but not all) SeparateInstanceTest tests have been "
-        << "filtered out this test will fail. Make sure that all "
-        << "GeneratorEvaluationTest are selected or de-selected together "
-        << "by the test filter.";
-  }
-
- protected:
-  int count_;
-  static int global_count_;
-};
-int SeparateInstanceTest::global_count_ = 0;
-
-TEST_P(SeparateInstanceTest, TestsRunInSeparateInstances) {
-  EXPECT_EQ(0, count_++);
-  global_count_++;
-}
-INSTANTIATE_TEST_SUITE_P(FourElemSequence, SeparateInstanceTest, Range(1, 4));
-
-// Tests that all instantiations of a test have named appropriately. Test
-// defined with TEST_P(TestSuiteName, TestName) and instantiated with
-// INSTANTIATE_TEST_SUITE_P(SequenceName, TestSuiteName, generator) must be
-// named SequenceName/TestSuiteName.TestName/i, where i is the 0-based index of
-// the sequence element used to instantiate the test.
-class NamingTest : public TestWithParam<int> {};
-
-TEST_P(NamingTest, TestsReportCorrectNamesAndParameters) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("ZeroToFiveSequence/NamingTest", test_info->test_suite_name());
-
-  Message index_stream;
-  index_stream << "TestsReportCorrectNamesAndParameters/" << GetParam();
-  EXPECT_STREQ(index_stream.GetString().c_str(), test_info->name());
-
-  EXPECT_EQ(::testing::PrintToString(GetParam()), test_info->value_param());
-}
-
-INSTANTIATE_TEST_SUITE_P(ZeroToFiveSequence, NamingTest, Range(0, 5));
-
-// Tests that macros in test names are expanded correctly.
-class MacroNamingTest : public TestWithParam<int> {};
-
-#define PREFIX_WITH_FOO(test_name) Foo##test_name
-#define PREFIX_WITH_MACRO(test_name) Macro##test_name
-
-TEST_P(PREFIX_WITH_MACRO(NamingTest), PREFIX_WITH_FOO(SomeTestName)) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("FortyTwo/MacroNamingTest", test_info->test_suite_name());
-  EXPECT_STREQ("FooSomeTestName", test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(FortyTwo, MacroNamingTest, Values(42));
-
-// Tests the same thing for non-parametrized tests.
-class MacroNamingTestNonParametrized : public ::testing::Test {};
-
-TEST_F(PREFIX_WITH_MACRO(NamingTestNonParametrized),
-       PREFIX_WITH_FOO(SomeTestName)) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_STREQ("MacroNamingTestNonParametrized", test_info->test_suite_name());
-  EXPECT_STREQ("FooSomeTestName", test_info->name());
-}
-
-// Tests that user supplied custom parameter names are working correctly.
-// Runs the test with a builtin helper method which uses PrintToString,
-// as well as a custom function and custom functor to ensure all possible
-// uses work correctly.
-class CustomFunctorNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomFunctorNamingTest, CustomTestNames) {}
-
-struct CustomParamNameFunctor {
-  std::string operator()(const ::testing::TestParamInfo<std::string>& inf) {
-    return inf.param;
-  }
-};
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunctor, CustomFunctorNamingTest,
-                         Values(std::string("FunctorName")),
-                         CustomParamNameFunctor());
-
-INSTANTIATE_TEST_SUITE_P(AllAllowedCharacters, CustomFunctorNamingTest,
-                         Values("abcdefghijklmnopqrstuvwxyz",
-                                "ABCDEFGHIJKLMNOPQRSTUVWXYZ", "01234567890_"),
-                         CustomParamNameFunctor());
-
-inline std::string CustomParamNameFunction(
-    const ::testing::TestParamInfo<std::string>& inf) {
-  return inf.param;
-}
-
-class CustomFunctionNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomFunctionNamingTest, CustomTestNames) {}
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunction, CustomFunctionNamingTest,
-                         Values(std::string("FunctionName")),
-                         CustomParamNameFunction);
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameFunctionP, CustomFunctionNamingTest,
-                         Values(std::string("FunctionNameP")),
-                         &CustomParamNameFunction);
-
-// Test custom naming with a lambda
-
-class CustomLambdaNamingTest : public TestWithParam<std::string> {};
-TEST_P(CustomLambdaNamingTest, CustomTestNames) {}
-
-INSTANTIATE_TEST_SUITE_P(CustomParamNameLambda, CustomLambdaNamingTest,
-                         Values(std::string("LambdaName")),
-                         [](const ::testing::TestParamInfo<std::string>& inf) {
-                           return inf.param;
-                         });
-
-TEST(CustomNamingTest, CheckNameRegistry) {
-  ::testing::UnitTest* unit_test = ::testing::UnitTest::GetInstance();
-  std::set<std::string> test_names;
-  for (int suite_num = 0; suite_num < unit_test->total_test_suite_count();
-       ++suite_num) {
-    const ::testing::TestSuite* test_suite = unit_test->GetTestSuite(suite_num);
-    for (int test_num = 0; test_num < test_suite->total_test_count();
-         ++test_num) {
-      const ::testing::TestInfo* test_info = test_suite->GetTestInfo(test_num);
-      test_names.insert(std::string(test_info->name()));
-    }
-  }
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctorName"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctionName"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/FunctionNameP"));
-  EXPECT_EQ(1u, test_names.count("CustomTestNames/LambdaName"));
-}
-
-// Test a numeric name to ensure PrintToStringParamName works correctly.
-
-class CustomIntegerNamingTest : public TestWithParam<int> {};
-
-TEST_P(CustomIntegerNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << GetParam();
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintToString, CustomIntegerNamingTest, Range(0, 5),
-                         ::testing::PrintToStringParamName());
-
-// Test a custom struct with PrintToString.
-
-struct CustomStruct {
-  explicit CustomStruct(int value) : x(value) {}
-  int x;
-};
-
-std::ostream& operator<<(std::ostream& stream, const CustomStruct& val) {
-  stream << val.x;
-  return stream;
-}
-
-class CustomStructNamingTest : public TestWithParam<CustomStruct> {};
-
-TEST_P(CustomStructNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << GetParam();
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(PrintToString, CustomStructNamingTest,
-                         Values(CustomStruct(0), CustomStruct(1)),
-                         ::testing::PrintToStringParamName());
-
-// Test that using a stateful parameter naming function works as expected.
-
-struct StatefulNamingFunctor {
-  StatefulNamingFunctor() : sum(0) {}
-  std::string operator()(const ::testing::TestParamInfo<int>& info) {
-    int value = info.param + sum;
-    sum += info.param;
-    return ::testing::PrintToString(value);
-  }
-  int sum;
-};
-
-class StatefulNamingTest : public ::testing::TestWithParam<int> {
- protected:
-  StatefulNamingTest() : sum_(0) {}
-  int sum_;
-};
-
-TEST_P(StatefulNamingTest, TestsReportCorrectNames) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-  sum_ += GetParam();
-  Message test_name_stream;
-  test_name_stream << "TestsReportCorrectNames/" << sum_;
-  EXPECT_STREQ(test_name_stream.GetString().c_str(), test_info->name());
-}
-
-INSTANTIATE_TEST_SUITE_P(StatefulNamingFunctor, StatefulNamingTest, Range(0, 5),
-                         StatefulNamingFunctor());
-
-// Class that cannot be streamed into an ostream.  It needs to be copyable
-// (and, in case of MSVC, also assignable) in order to be a test parameter
-// type.  Its default copy constructor and assignment operator do exactly
-// what we need.
-class Unstreamable {
- public:
-  explicit Unstreamable(int value) : value_(value) {}
-  // -Wunused-private-field: dummy accessor for `value_`.
-  const int& dummy_value() const { return value_; }
-
- private:
-  int value_;
-};
-
-class CommentTest : public TestWithParam<Unstreamable> {};
-
-TEST_P(CommentTest, TestsCorrectlyReportUnstreamableParams) {
-  const ::testing::TestInfo* const test_info =
-     ::testing::UnitTest::GetInstance()->current_test_info();
-
-  EXPECT_EQ(::testing::PrintToString(GetParam()), test_info->value_param());
-}
-
-INSTANTIATE_TEST_SUITE_P(InstantiationWithComments, CommentTest,
-                         Values(Unstreamable(1)));
-
-// Verify that we can create a hierarchy of test fixtures, where the base
-// class fixture is not parameterized and the derived class is. In this case
-// ParameterizedDerivedTest inherits from NonParameterizedBaseTest.  We
-// perform simple tests on both.
-class NonParameterizedBaseTest : public ::testing::Test {
- public:
-  NonParameterizedBaseTest() : n_(17) { }
- protected:
-  int n_;
-};
-
-class ParameterizedDerivedTest : public NonParameterizedBaseTest,
-                                 public ::testing::WithParamInterface<int> {
- protected:
-  ParameterizedDerivedTest() : count_(0) { }
-  int count_;
-  static int global_count_;
-};
-
-int ParameterizedDerivedTest::global_count_ = 0;
-
-TEST_F(NonParameterizedBaseTest, FixtureIsInitialized) {
-  EXPECT_EQ(17, n_);
-}
-
-TEST_P(ParameterizedDerivedTest, SeesSequence) {
-  EXPECT_EQ(17, n_);
-  EXPECT_EQ(0, count_++);
-  EXPECT_EQ(GetParam(), global_count_++);
-}
-
-class ParameterizedDeathTest : public ::testing::TestWithParam<int> { };
-
-TEST_F(ParameterizedDeathTest, GetParamDiesFromTestF) {
-  EXPECT_DEATH_IF_SUPPORTED(GetParam(),
-                            ".* value-parameterized test .*");
-}
-
-INSTANTIATE_TEST_SUITE_P(RangeZeroToFive, ParameterizedDerivedTest,
-                         Range(0, 5));
-
-// Tests param generator working with Enums
-enum MyEnums {
-  ENUM1 = 1,
-  ENUM2 = 3,
-  ENUM3 = 8,
-};
-
-class MyEnumTest : public testing::TestWithParam<MyEnums> {};
-
-TEST_P(MyEnumTest, ChecksParamMoreThanZero) { EXPECT_GE(10, GetParam()); }
-INSTANTIATE_TEST_SUITE_P(MyEnumTests, MyEnumTest,
-                         ::testing::Values(ENUM1, ENUM2, 0));
-
-int main(int argc, char **argv) {
-  // Used in TestGenerationTest test suite.
-  AddGlobalTestEnvironment(TestGenerationTest::Environment::Instance());
-  // Used in GeneratorEvaluationTest test suite. Tests that the updated value
-  // will be picked up for instantiating tests in GeneratorEvaluationTest.
-  GeneratorEvaluationTest::set_param_value(1);
-
-  ::testing::InitGoogleTest(&argc, argv);
-
-  // Used in GeneratorEvaluationTest test suite. Tests that value updated
-  // here will NOT be used for instantiating tests in
-  // GeneratorEvaluationTest.
-  GeneratorEvaluationTest::set_param_value(2);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-param-test-test.h b/3rdparty/gtest/test/googletest-param-test-test.h
deleted file mode 100644
index 64805701..00000000
--- a/3rdparty/gtest/test/googletest-param-test-test.h
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This header file provides classes and functions used internally
-// for testing Google Test itself.
-
-#ifndef GTEST_TEST_GTEST_PARAM_TEST_TEST_H_
-#define GTEST_TEST_GTEST_PARAM_TEST_TEST_H_
-
-#include "gtest/gtest.h"
-
-// Test fixture for testing definition and instantiation of a test
-// in separate translation units.
-class ExternalInstantiationTest : public ::testing::TestWithParam<int> {
-};
-
-// Test fixture for testing instantiation of a test in multiple
-// translation units.
-class InstantiationInMultipleTranslationUnitsTest
-    : public ::testing::TestWithParam<int> {
-};
-
-#endif  // GTEST_TEST_GTEST_PARAM_TEST_TEST_H_
diff --git a/3rdparty/gtest/test/googletest-param-test2-test.cc b/3rdparty/gtest/test/googletest-param-test2-test.cc
deleted file mode 100644
index 2a29fb1d..00000000
--- a/3rdparty/gtest/test/googletest-param-test2-test.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself.  This verifies that the basic constructs of
-// Google Test work.
-
-#include "gtest/gtest.h"
-#include "test/googletest-param-test-test.h"
-
-using ::testing::Values;
-using ::testing::internal::ParamGenerator;
-
-// Tests that generators defined in a different translation unit
-// are functional. The test using extern_gen is defined
-// in googletest-param-test-test.cc.
-ParamGenerator<int> extern_gen = Values(33);
-
-// Tests that a parameterized test case can be defined in one translation unit
-// and instantiated in another. The test is defined in
-// googletest-param-test-test.cc and ExternalInstantiationTest fixture class is
-// defined in gtest-param-test_test.h.
-INSTANTIATE_TEST_SUITE_P(MultiplesOf33,
-                         ExternalInstantiationTest,
-                         Values(33, 66));
-
-// Tests that a parameterized test case can be instantiated
-// in multiple translation units. Another instantiation is defined
-// in googletest-param-test-test.cc and
-// InstantiationInMultipleTranslationUnitsTest fixture is defined in
-// gtest-param-test_test.h
-INSTANTIATE_TEST_SUITE_P(Sequence2,
-                         InstantiationInMultipleTranslationUnitsTest,
-                         Values(42*3, 42*4, 42*5));
-
diff --git a/3rdparty/gtest/test/googletest-port-test.cc b/3rdparty/gtest/test/googletest-port-test.cc
deleted file mode 100644
index 60d637c3..00000000
--- a/3rdparty/gtest/test/googletest-port-test.cc
+++ /dev/null
@@ -1,1272 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This file tests the internal cross-platform support utilities.
-#include <stdio.h>
-
-#include "gtest/internal/gtest-port.h"
-
-#if GTEST_OS_MAC
-# include <time.h>
-#endif  // GTEST_OS_MAC
-
-#include <list>
-#include <memory>
-#include <utility>  // For std::pair and std::make_pair.
-#include <vector>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-#include "src/gtest-internal-inl.h"
-
-using std::make_pair;
-using std::pair;
-
-namespace testing {
-namespace internal {
-
-TEST(IsXDigitTest, WorksForNarrowAscii) {
-  EXPECT_TRUE(IsXDigit('0'));
-  EXPECT_TRUE(IsXDigit('9'));
-  EXPECT_TRUE(IsXDigit('A'));
-  EXPECT_TRUE(IsXDigit('F'));
-  EXPECT_TRUE(IsXDigit('a'));
-  EXPECT_TRUE(IsXDigit('f'));
-
-  EXPECT_FALSE(IsXDigit('-'));
-  EXPECT_FALSE(IsXDigit('g'));
-  EXPECT_FALSE(IsXDigit('G'));
-}
-
-TEST(IsXDigitTest, ReturnsFalseForNarrowNonAscii) {
-  EXPECT_FALSE(IsXDigit(static_cast<char>('\x80')));
-  EXPECT_FALSE(IsXDigit(static_cast<char>('0' | '\x80')));
-}
-
-TEST(IsXDigitTest, WorksForWideAscii) {
-  EXPECT_TRUE(IsXDigit(L'0'));
-  EXPECT_TRUE(IsXDigit(L'9'));
-  EXPECT_TRUE(IsXDigit(L'A'));
-  EXPECT_TRUE(IsXDigit(L'F'));
-  EXPECT_TRUE(IsXDigit(L'a'));
-  EXPECT_TRUE(IsXDigit(L'f'));
-
-  EXPECT_FALSE(IsXDigit(L'-'));
-  EXPECT_FALSE(IsXDigit(L'g'));
-  EXPECT_FALSE(IsXDigit(L'G'));
-}
-
-TEST(IsXDigitTest, ReturnsFalseForWideNonAscii) {
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(0x80)));
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(L'0' | 0x80)));
-  EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(L'0' | 0x100)));
-}
-
-class Base {
- public:
-  // Copy constructor and assignment operator do exactly what we need, so we
-  // use them.
-  Base() : member_(0) {}
-  explicit Base(int n) : member_(n) {}
-  virtual ~Base() {}
-  int member() { return member_; }
-
- private:
-  int member_;
-};
-
-class Derived : public Base {
- public:
-  explicit Derived(int n) : Base(n) {}
-};
-
-TEST(ImplicitCastTest, ConvertsPointers) {
-  Derived derived(0);
-  EXPECT_TRUE(&derived == ::testing::internal::ImplicitCast_<Base*>(&derived));
-}
-
-TEST(ImplicitCastTest, CanUseInheritance) {
-  Derived derived(1);
-  Base base = ::testing::internal::ImplicitCast_<Base>(derived);
-  EXPECT_EQ(derived.member(), base.member());
-}
-
-class Castable {
- public:
-  explicit Castable(bool* converted) : converted_(converted) {}
-  operator Base() {
-    *converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-};
-
-TEST(ImplicitCastTest, CanUseNonConstCastOperator) {
-  bool converted = false;
-  Castable castable(&converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(castable);
-  EXPECT_TRUE(converted);
-}
-
-class ConstCastable {
- public:
-  explicit ConstCastable(bool* converted) : converted_(converted) {}
-  operator Base() const {
-    *converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-};
-
-TEST(ImplicitCastTest, CanUseConstCastOperatorOnConstValues) {
-  bool converted = false;
-  const ConstCastable const_castable(&converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(const_castable);
-  EXPECT_TRUE(converted);
-}
-
-class ConstAndNonConstCastable {
- public:
-  ConstAndNonConstCastable(bool* converted, bool* const_converted)
-      : converted_(converted), const_converted_(const_converted) {}
-  operator Base() {
-    *converted_ = true;
-    return Base();
-  }
-  operator Base() const {
-    *const_converted_ = true;
-    return Base();
-  }
-
- private:
-  bool* converted_;
-  bool* const_converted_;
-};
-
-TEST(ImplicitCastTest, CanSelectBetweenConstAndNonConstCasrAppropriately) {
-  bool converted = false;
-  bool const_converted = false;
-  ConstAndNonConstCastable castable(&converted, &const_converted);
-  Base base = ::testing::internal::ImplicitCast_<Base>(castable);
-  EXPECT_TRUE(converted);
-  EXPECT_FALSE(const_converted);
-
-  converted = false;
-  const_converted = false;
-  const ConstAndNonConstCastable const_castable(&converted, &const_converted);
-  base = ::testing::internal::ImplicitCast_<Base>(const_castable);
-  EXPECT_FALSE(converted);
-  EXPECT_TRUE(const_converted);
-}
-
-class To {
- public:
-  To(bool* converted) { *converted = true; }  // NOLINT
-};
-
-TEST(ImplicitCastTest, CanUseImplicitConstructor) {
-  bool converted = false;
-  To to = ::testing::internal::ImplicitCast_<To>(&converted);
-  (void)to;
-  EXPECT_TRUE(converted);
-}
-
-TEST(GtestCheckSyntaxTest, BehavesLikeASingleStatement) {
-  if (AlwaysFalse())
-    GTEST_CHECK_(false) << "This should never be executed; "
-                           "It's a compilation test only.";
-
-  if (AlwaysTrue())
-    GTEST_CHECK_(true);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    GTEST_CHECK_(true) << "";
-}
-
-TEST(GtestCheckSyntaxTest, WorksWithSwitch) {
-  switch (0) {
-    case 1:
-      break;
-    default:
-      GTEST_CHECK_(true);
-  }
-
-  switch (0)
-    case 0:
-      GTEST_CHECK_(true) << "Check failed in switch case";
-}
-
-// Verifies behavior of FormatFileLocation.
-TEST(FormatFileLocationTest, FormatsFileLocation) {
-  EXPECT_PRED_FORMAT2(IsSubstring, "foo.cc", FormatFileLocation("foo.cc", 42));
-  EXPECT_PRED_FORMAT2(IsSubstring, "42", FormatFileLocation("foo.cc", 42));
-}
-
-TEST(FormatFileLocationTest, FormatsUnknownFile) {
-  EXPECT_PRED_FORMAT2(IsSubstring, "unknown file",
-                      FormatFileLocation(nullptr, 42));
-  EXPECT_PRED_FORMAT2(IsSubstring, "42", FormatFileLocation(nullptr, 42));
-}
-
-TEST(FormatFileLocationTest, FormatsUknownLine) {
-  EXPECT_EQ("foo.cc:", FormatFileLocation("foo.cc", -1));
-}
-
-TEST(FormatFileLocationTest, FormatsUknownFileAndLine) {
-  EXPECT_EQ("unknown file:", FormatFileLocation(nullptr, -1));
-}
-
-// Verifies behavior of FormatCompilerIndependentFileLocation.
-TEST(FormatCompilerIndependentFileLocationTest, FormatsFileLocation) {
-  EXPECT_EQ("foo.cc:42", FormatCompilerIndependentFileLocation("foo.cc", 42));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownFile) {
-  EXPECT_EQ("unknown file:42",
-            FormatCompilerIndependentFileLocation(nullptr, 42));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownLine) {
-  EXPECT_EQ("foo.cc", FormatCompilerIndependentFileLocation("foo.cc", -1));
-}
-
-TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownFileAndLine) {
-  EXPECT_EQ("unknown file", FormatCompilerIndependentFileLocation(nullptr, -1));
-}
-
-#if GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_QNX || GTEST_OS_FUCHSIA || \
-    GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
-    GTEST_OS_NETBSD || GTEST_OS_OPENBSD
-void* ThreadFunc(void* data) {
-  internal::Mutex* mutex = static_cast<internal::Mutex*>(data);
-  mutex->Lock();
-  mutex->Unlock();
-  return nullptr;
-}
-
-TEST(GetThreadCountTest, ReturnsCorrectValue) {
-  const size_t starting_count = GetThreadCount();
-  pthread_t       thread_id;
-
-  internal::Mutex mutex;
-  {
-    internal::MutexLock lock(&mutex);
-    pthread_attr_t  attr;
-    ASSERT_EQ(0, pthread_attr_init(&attr));
-    ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE));
-
-    const int status = pthread_create(&thread_id, &attr, &ThreadFunc, &mutex);
-    ASSERT_EQ(0, pthread_attr_destroy(&attr));
-    ASSERT_EQ(0, status);
-    EXPECT_EQ(starting_count + 1, GetThreadCount());
-  }
-
-  void* dummy;
-  ASSERT_EQ(0, pthread_join(thread_id, &dummy));
-
-  // The OS may not immediately report the updated thread count after
-  // joining a thread, causing flakiness in this test. To counter that, we
-  // wait for up to .5 seconds for the OS to report the correct value.
-  for (int i = 0; i < 5; ++i) {
-    if (GetThreadCount() == starting_count)
-      break;
-
-    SleepMilliseconds(100);
-  }
-
-  EXPECT_EQ(starting_count, GetThreadCount());
-}
-#else
-TEST(GetThreadCountTest, ReturnsZeroWhenUnableToCountThreads) {
-  EXPECT_EQ(0U, GetThreadCount());
-}
-#endif  // GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_QNX || GTEST_OS_FUCHSIA
-
-TEST(GtestCheckDeathTest, DiesWithCorrectOutputOnFailure) {
-  const bool a_false_condition = false;
-  const char regex[] =
-#ifdef _MSC_VER
-     "googletest-port-test\\.cc\\(\\d+\\):"
-#elif GTEST_USES_POSIX_RE
-     "googletest-port-test\\.cc:[0-9]+"
-#else
-     "googletest-port-test\\.cc:\\d+"
-#endif  // _MSC_VER
-     ".*a_false_condition.*Extra info.*";
-
-  EXPECT_DEATH_IF_SUPPORTED(GTEST_CHECK_(a_false_condition) << "Extra info",
-                            regex);
-}
-
-#if GTEST_HAS_DEATH_TEST
-
-TEST(GtestCheckDeathTest, LivesSilentlyOnSuccess) {
-  EXPECT_EXIT({
-      GTEST_CHECK_(true) << "Extra info";
-      ::std::cerr << "Success\n";
-      exit(0); },
-      ::testing::ExitedWithCode(0), "Success");
-}
-
-#endif  // GTEST_HAS_DEATH_TEST
-
-// Verifies that Google Test choose regular expression engine appropriate to
-// the platform. The test will produce compiler errors in case of failure.
-// For simplicity, we only cover the most important platforms here.
-TEST(RegexEngineSelectionTest, SelectsCorrectRegexEngine) {
-#if !GTEST_USES_PCRE
-# if GTEST_HAS_POSIX_RE
-
-  EXPECT_TRUE(GTEST_USES_POSIX_RE);
-
-# else
-
-  EXPECT_TRUE(GTEST_USES_SIMPLE_RE);
-
-# endif
-#endif  // !GTEST_USES_PCRE
-}
-
-#if GTEST_USES_POSIX_RE
-
-# if GTEST_HAS_TYPED_TEST
-
-template <typename Str>
-class RETest : public ::testing::Test {};
-
-// Defines StringTypes as the list of all string types that class RE
-// supports.
-typedef testing::Types< ::std::string, const char*> StringTypes;
-
-TYPED_TEST_SUITE(RETest, StringTypes);
-
-// Tests RE's implicit constructors.
-TYPED_TEST(RETest, ImplicitConstructorWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_STREQ("", empty.pattern());
-
-  const RE simple(TypeParam("hello"));
-  EXPECT_STREQ("hello", simple.pattern());
-
-  const RE normal(TypeParam(".*(\\w+)"));
-  EXPECT_STREQ(".*(\\w+)", normal.pattern());
-}
-
-// Tests that RE's constructors reject invalid regular expressions.
-TYPED_TEST(RETest, RejectsInvalidRegex) {
-  EXPECT_NONFATAL_FAILURE({
-    const RE invalid(TypeParam("?"));
-  }, "\"?\" is not a valid POSIX Extended regular expression.");
-}
-
-// Tests RE::FullMatch().
-TYPED_TEST(RETest, FullMatchWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_TRUE(RE::FullMatch(TypeParam(""), empty));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("a"), empty));
-
-  const RE re(TypeParam("a.*z"));
-  EXPECT_TRUE(RE::FullMatch(TypeParam("az"), re));
-  EXPECT_TRUE(RE::FullMatch(TypeParam("axyz"), re));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("baz"), re));
-  EXPECT_FALSE(RE::FullMatch(TypeParam("azy"), re));
-}
-
-// Tests RE::PartialMatch().
-TYPED_TEST(RETest, PartialMatchWorks) {
-  const RE empty(TypeParam(""));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam(""), empty));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("a"), empty));
-
-  const RE re(TypeParam("a.*z"));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("az"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("axyz"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("baz"), re));
-  EXPECT_TRUE(RE::PartialMatch(TypeParam("azy"), re));
-  EXPECT_FALSE(RE::PartialMatch(TypeParam("zza"), re));
-}
-
-# endif  // GTEST_HAS_TYPED_TEST
-
-#elif GTEST_USES_SIMPLE_RE
-
-TEST(IsInSetTest, NulCharIsNotInAnySet) {
-  EXPECT_FALSE(IsInSet('\0', ""));
-  EXPECT_FALSE(IsInSet('\0', "\0"));
-  EXPECT_FALSE(IsInSet('\0', "a"));
-}
-
-TEST(IsInSetTest, WorksForNonNulChars) {
-  EXPECT_FALSE(IsInSet('a', "Ab"));
-  EXPECT_FALSE(IsInSet('c', ""));
-
-  EXPECT_TRUE(IsInSet('b', "bcd"));
-  EXPECT_TRUE(IsInSet('b', "ab"));
-}
-
-TEST(IsAsciiDigitTest, IsFalseForNonDigit) {
-  EXPECT_FALSE(IsAsciiDigit('\0'));
-  EXPECT_FALSE(IsAsciiDigit(' '));
-  EXPECT_FALSE(IsAsciiDigit('+'));
-  EXPECT_FALSE(IsAsciiDigit('-'));
-  EXPECT_FALSE(IsAsciiDigit('.'));
-  EXPECT_FALSE(IsAsciiDigit('a'));
-}
-
-TEST(IsAsciiDigitTest, IsTrueForDigit) {
-  EXPECT_TRUE(IsAsciiDigit('0'));
-  EXPECT_TRUE(IsAsciiDigit('1'));
-  EXPECT_TRUE(IsAsciiDigit('5'));
-  EXPECT_TRUE(IsAsciiDigit('9'));
-}
-
-TEST(IsAsciiPunctTest, IsFalseForNonPunct) {
-  EXPECT_FALSE(IsAsciiPunct('\0'));
-  EXPECT_FALSE(IsAsciiPunct(' '));
-  EXPECT_FALSE(IsAsciiPunct('\n'));
-  EXPECT_FALSE(IsAsciiPunct('a'));
-  EXPECT_FALSE(IsAsciiPunct('0'));
-}
-
-TEST(IsAsciiPunctTest, IsTrueForPunct) {
-  for (const char* p = "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~"; *p; p++) {
-    EXPECT_PRED1(IsAsciiPunct, *p);
-  }
-}
-
-TEST(IsRepeatTest, IsFalseForNonRepeatChar) {
-  EXPECT_FALSE(IsRepeat('\0'));
-  EXPECT_FALSE(IsRepeat(' '));
-  EXPECT_FALSE(IsRepeat('a'));
-  EXPECT_FALSE(IsRepeat('1'));
-  EXPECT_FALSE(IsRepeat('-'));
-}
-
-TEST(IsRepeatTest, IsTrueForRepeatChar) {
-  EXPECT_TRUE(IsRepeat('?'));
-  EXPECT_TRUE(IsRepeat('*'));
-  EXPECT_TRUE(IsRepeat('+'));
-}
-
-TEST(IsAsciiWhiteSpaceTest, IsFalseForNonWhiteSpace) {
-  EXPECT_FALSE(IsAsciiWhiteSpace('\0'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('a'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('1'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('+'));
-  EXPECT_FALSE(IsAsciiWhiteSpace('_'));
-}
-
-TEST(IsAsciiWhiteSpaceTest, IsTrueForWhiteSpace) {
-  EXPECT_TRUE(IsAsciiWhiteSpace(' '));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\n'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\r'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\t'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\v'));
-  EXPECT_TRUE(IsAsciiWhiteSpace('\f'));
-}
-
-TEST(IsAsciiWordCharTest, IsFalseForNonWordChar) {
-  EXPECT_FALSE(IsAsciiWordChar('\0'));
-  EXPECT_FALSE(IsAsciiWordChar('+'));
-  EXPECT_FALSE(IsAsciiWordChar('.'));
-  EXPECT_FALSE(IsAsciiWordChar(' '));
-  EXPECT_FALSE(IsAsciiWordChar('\n'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForLetter) {
-  EXPECT_TRUE(IsAsciiWordChar('a'));
-  EXPECT_TRUE(IsAsciiWordChar('b'));
-  EXPECT_TRUE(IsAsciiWordChar('A'));
-  EXPECT_TRUE(IsAsciiWordChar('Z'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForDigit) {
-  EXPECT_TRUE(IsAsciiWordChar('0'));
-  EXPECT_TRUE(IsAsciiWordChar('1'));
-  EXPECT_TRUE(IsAsciiWordChar('7'));
-  EXPECT_TRUE(IsAsciiWordChar('9'));
-}
-
-TEST(IsAsciiWordCharTest, IsTrueForUnderscore) {
-  EXPECT_TRUE(IsAsciiWordChar('_'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForNonPrintable) {
-  EXPECT_FALSE(IsValidEscape('\0'));
-  EXPECT_FALSE(IsValidEscape('\007'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForDigit) {
-  EXPECT_FALSE(IsValidEscape('0'));
-  EXPECT_FALSE(IsValidEscape('9'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForWhiteSpace) {
-  EXPECT_FALSE(IsValidEscape(' '));
-  EXPECT_FALSE(IsValidEscape('\n'));
-}
-
-TEST(IsValidEscapeTest, IsFalseForSomeLetter) {
-  EXPECT_FALSE(IsValidEscape('a'));
-  EXPECT_FALSE(IsValidEscape('Z'));
-}
-
-TEST(IsValidEscapeTest, IsTrueForPunct) {
-  EXPECT_TRUE(IsValidEscape('.'));
-  EXPECT_TRUE(IsValidEscape('-'));
-  EXPECT_TRUE(IsValidEscape('^'));
-  EXPECT_TRUE(IsValidEscape('$'));
-  EXPECT_TRUE(IsValidEscape('('));
-  EXPECT_TRUE(IsValidEscape(']'));
-  EXPECT_TRUE(IsValidEscape('{'));
-  EXPECT_TRUE(IsValidEscape('|'));
-}
-
-TEST(IsValidEscapeTest, IsTrueForSomeLetter) {
-  EXPECT_TRUE(IsValidEscape('d'));
-  EXPECT_TRUE(IsValidEscape('D'));
-  EXPECT_TRUE(IsValidEscape('s'));
-  EXPECT_TRUE(IsValidEscape('S'));
-  EXPECT_TRUE(IsValidEscape('w'));
-  EXPECT_TRUE(IsValidEscape('W'));
-}
-
-TEST(AtomMatchesCharTest, EscapedPunct) {
-  EXPECT_FALSE(AtomMatchesChar(true, '\\', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, '\\', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, '_', '.'));
-  EXPECT_FALSE(AtomMatchesChar(true, '.', 'a'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, '\\', '\\'));
-  EXPECT_TRUE(AtomMatchesChar(true, '_', '_'));
-  EXPECT_TRUE(AtomMatchesChar(true, '+', '+'));
-  EXPECT_TRUE(AtomMatchesChar(true, '.', '.'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_d) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'd', '.'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'd', '0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'd', '9'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_D) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'D', '0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'D', '9'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'D', '-'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_s) {
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '.'));
-  EXPECT_FALSE(AtomMatchesChar(true, 's', '9'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 's', ' '));
-  EXPECT_TRUE(AtomMatchesChar(true, 's', '\n'));
-  EXPECT_TRUE(AtomMatchesChar(true, 's', '\t'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_S) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'S', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, 'S', '\r'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'S', '9'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_w) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '+'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', ' '));
-  EXPECT_FALSE(AtomMatchesChar(true, 'w', '\n'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', '0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', 'b'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', 'C'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'w', '_'));
-}
-
-TEST(AtomMatchesCharTest, Escaped_W) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', 'A'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', 'b'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', '9'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'W', '_'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '*'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'W', '\n'));
-}
-
-TEST(AtomMatchesCharTest, EscapedWhiteSpace) {
-  EXPECT_FALSE(AtomMatchesChar(true, 'f', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'f', '\n'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'n', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'n', '\r'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'r', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'r', 'a'));
-  EXPECT_FALSE(AtomMatchesChar(true, 't', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 't', 't'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'v', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(true, 'v', '\f'));
-
-  EXPECT_TRUE(AtomMatchesChar(true, 'f', '\f'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'n', '\n'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'r', '\r'));
-  EXPECT_TRUE(AtomMatchesChar(true, 't', '\t'));
-  EXPECT_TRUE(AtomMatchesChar(true, 'v', '\v'));
-}
-
-TEST(AtomMatchesCharTest, UnescapedDot) {
-  EXPECT_FALSE(AtomMatchesChar(false, '.', '\n'));
-
-  EXPECT_TRUE(AtomMatchesChar(false, '.', '\0'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', '.'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', 'a'));
-  EXPECT_TRUE(AtomMatchesChar(false, '.', ' '));
-}
-
-TEST(AtomMatchesCharTest, UnescapedChar) {
-  EXPECT_FALSE(AtomMatchesChar(false, 'a', '\0'));
-  EXPECT_FALSE(AtomMatchesChar(false, 'a', 'b'));
-  EXPECT_FALSE(AtomMatchesChar(false, '$', 'a'));
-
-  EXPECT_TRUE(AtomMatchesChar(false, '$', '$'));
-  EXPECT_TRUE(AtomMatchesChar(false, '5', '5'));
-  EXPECT_TRUE(AtomMatchesChar(false, 'Z', 'Z'));
-}
-
-TEST(ValidateRegexTest, GeneratesFailureAndReturnsFalseForInvalid) {
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex(NULL)),
-                          "NULL is not a valid simple regular expression");
-  EXPECT_NONFATAL_FAILURE(
-      ASSERT_FALSE(ValidateRegex("a\\")),
-      "Syntax error at index 1 in simple regular expression \"a\\\": ");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a\\")),
-                          "'\\' cannot appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("\\n\\")),
-                          "'\\' cannot appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("\\s\\hb")),
-                          "invalid escape sequence \"\\h\"");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^^")),
-                          "'^' can only appear at the beginning");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex(".*^b")),
-                          "'^' can only appear at the beginning");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("$$")),
-                          "'$' can only appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^$a")),
-                          "'$' can only appear at the end");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a(b")),
-                          "'(' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("ab)")),
-                          "')' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("[ab")),
-                          "'[' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a{2")),
-                          "'{' is unsupported");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("?")),
-                          "'?' can only follow a repeatable token");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^*")),
-                          "'*' can only follow a repeatable token");
-  EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("5*+")),
-                          "'+' can only follow a repeatable token");
-}
-
-TEST(ValidateRegexTest, ReturnsTrueForValid) {
-  EXPECT_TRUE(ValidateRegex(""));
-  EXPECT_TRUE(ValidateRegex("a"));
-  EXPECT_TRUE(ValidateRegex(".*"));
-  EXPECT_TRUE(ValidateRegex("^a_+"));
-  EXPECT_TRUE(ValidateRegex("^a\\t\\&?"));
-  EXPECT_TRUE(ValidateRegex("09*$"));
-  EXPECT_TRUE(ValidateRegex("^Z$"));
-  EXPECT_TRUE(ValidateRegex("a\\^Z\\$\\(\\)\\|\\[\\]\\{\\}"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForZeroOrOne) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "a", "ba"));
-  // Repeating more than once.
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "aab"));
-
-  // Repeating zero times.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "ba"));
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "ab"));
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '#', '?', ".", "##"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForZeroOrMany) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '*', "a$", "baab"));
-
-  // Repeating zero times.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '*', "b", "bc"));
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '*', "b", "abc"));
-  // Repeating more than once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(true, 'w', '*', "-", "ab_1-g"));
-}
-
-TEST(MatchRepetitionAndRegexAtHeadTest, WorksForOneOrMany) {
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '+', "a$", "baab"));
-  // Repeating zero times.
-  EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '+', "b", "bc"));
-
-  // Repeating once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '+', "b", "abc"));
-  // Repeating more than once.
-  EXPECT_TRUE(MatchRepetitionAndRegexAtHead(true, 'w', '+', "-", "ab_1-g"));
-}
-
-TEST(MatchRegexAtHeadTest, ReturnsTrueForEmptyRegex) {
-  EXPECT_TRUE(MatchRegexAtHead("", ""));
-  EXPECT_TRUE(MatchRegexAtHead("", "ab"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenDollarIsInRegex) {
-  EXPECT_FALSE(MatchRegexAtHead("$", "a"));
-
-  EXPECT_TRUE(MatchRegexAtHead("$", ""));
-  EXPECT_TRUE(MatchRegexAtHead("a$", "a"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenRegexStartsWithEscapeSequence) {
-  EXPECT_FALSE(MatchRegexAtHead("\\w", "+"));
-  EXPECT_FALSE(MatchRegexAtHead("\\W", "ab"));
-
-  EXPECT_TRUE(MatchRegexAtHead("\\sa", "\nab"));
-  EXPECT_TRUE(MatchRegexAtHead("\\d", "1a"));
-}
-
-TEST(MatchRegexAtHeadTest, WorksWhenRegexStartsWithRepetition) {
-  EXPECT_FALSE(MatchRegexAtHead(".+a", "abc"));
-  EXPECT_FALSE(MatchRegexAtHead("a?b", "aab"));
-
-  EXPECT_TRUE(MatchRegexAtHead(".*a", "bc12-ab"));
-  EXPECT_TRUE(MatchRegexAtHead("a?b", "b"));
-  EXPECT_TRUE(MatchRegexAtHead("a?b", "ab"));
-}
-
-TEST(MatchRegexAtHeadTest,
-     WorksWhenRegexStartsWithRepetionOfEscapeSequence) {
-  EXPECT_FALSE(MatchRegexAtHead("\\.+a", "abc"));
-  EXPECT_FALSE(MatchRegexAtHead("\\s?b", "  b"));
-
-  EXPECT_TRUE(MatchRegexAtHead("\\(*a", "((((ab"));
-  EXPECT_TRUE(MatchRegexAtHead("\\^?b", "^b"));
-  EXPECT_TRUE(MatchRegexAtHead("\\\\?b", "b"));
-  EXPECT_TRUE(MatchRegexAtHead("\\\\?b", "\\b"));
-}
-
-TEST(MatchRegexAtHeadTest, MatchesSequentially) {
-  EXPECT_FALSE(MatchRegexAtHead("ab.*c", "acabc"));
-
-  EXPECT_TRUE(MatchRegexAtHead("ab.*c", "ab-fsc"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsFalseWhenStringIsNull) {
-  EXPECT_FALSE(MatchRegexAnywhere("", NULL));
-}
-
-TEST(MatchRegexAnywhereTest, WorksWhenRegexStartsWithCaret) {
-  EXPECT_FALSE(MatchRegexAnywhere("^a", "ba"));
-  EXPECT_FALSE(MatchRegexAnywhere("^$", "a"));
-
-  EXPECT_TRUE(MatchRegexAnywhere("^a", "ab"));
-  EXPECT_TRUE(MatchRegexAnywhere("^", "ab"));
-  EXPECT_TRUE(MatchRegexAnywhere("^$", ""));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsFalseWhenNoMatch) {
-  EXPECT_FALSE(MatchRegexAnywhere("a", "bcde123"));
-  EXPECT_FALSE(MatchRegexAnywhere("a.+a", "--aa88888888"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsTrueWhenMatchingPrefix) {
-  EXPECT_TRUE(MatchRegexAnywhere("\\w+", "ab1_ - 5"));
-  EXPECT_TRUE(MatchRegexAnywhere(".*=", "="));
-  EXPECT_TRUE(MatchRegexAnywhere("x.*ab?.*bc", "xaaabc"));
-}
-
-TEST(MatchRegexAnywhereTest, ReturnsTrueWhenMatchingNonPrefix) {
-  EXPECT_TRUE(MatchRegexAnywhere("\\w+", "$$$ ab1_ - 5"));
-  EXPECT_TRUE(MatchRegexAnywhere("\\.+=", "=  ...="));
-}
-
-// Tests RE's implicit constructors.
-TEST(RETest, ImplicitConstructorWorks) {
-  const RE empty("");
-  EXPECT_STREQ("", empty.pattern());
-
-  const RE simple("hello");
-  EXPECT_STREQ("hello", simple.pattern());
-}
-
-// Tests that RE's constructors reject invalid regular expressions.
-TEST(RETest, RejectsInvalidRegex) {
-  EXPECT_NONFATAL_FAILURE({
-    const RE normal(NULL);
-  }, "NULL is not a valid simple regular expression");
-
-  EXPECT_NONFATAL_FAILURE({
-    const RE normal(".*(\\w+");
-  }, "'(' is unsupported");
-
-  EXPECT_NONFATAL_FAILURE({
-    const RE invalid("^?");
-  }, "'?' can only follow a repeatable token");
-}
-
-// Tests RE::FullMatch().
-TEST(RETest, FullMatchWorks) {
-  const RE empty("");
-  EXPECT_TRUE(RE::FullMatch("", empty));
-  EXPECT_FALSE(RE::FullMatch("a", empty));
-
-  const RE re1("a");
-  EXPECT_TRUE(RE::FullMatch("a", re1));
-
-  const RE re("a.*z");
-  EXPECT_TRUE(RE::FullMatch("az", re));
-  EXPECT_TRUE(RE::FullMatch("axyz", re));
-  EXPECT_FALSE(RE::FullMatch("baz", re));
-  EXPECT_FALSE(RE::FullMatch("azy", re));
-}
-
-// Tests RE::PartialMatch().
-TEST(RETest, PartialMatchWorks) {
-  const RE empty("");
-  EXPECT_TRUE(RE::PartialMatch("", empty));
-  EXPECT_TRUE(RE::PartialMatch("a", empty));
-
-  const RE re("a.*z");
-  EXPECT_TRUE(RE::PartialMatch("az", re));
-  EXPECT_TRUE(RE::PartialMatch("axyz", re));
-  EXPECT_TRUE(RE::PartialMatch("baz", re));
-  EXPECT_TRUE(RE::PartialMatch("azy", re));
-  EXPECT_FALSE(RE::PartialMatch("zza", re));
-}
-
-#endif  // GTEST_USES_POSIX_RE
-
-#if !GTEST_OS_WINDOWS_MOBILE
-
-TEST(CaptureTest, CapturesStdout) {
-  CaptureStdout();
-  fprintf(stdout, "abc");
-  EXPECT_STREQ("abc", GetCapturedStdout().c_str());
-
-  CaptureStdout();
-  fprintf(stdout, "def%cghi", '\0');
-  EXPECT_EQ(::std::string("def\0ghi", 7), ::std::string(GetCapturedStdout()));
-}
-
-TEST(CaptureTest, CapturesStderr) {
-  CaptureStderr();
-  fprintf(stderr, "jkl");
-  EXPECT_STREQ("jkl", GetCapturedStderr().c_str());
-
-  CaptureStderr();
-  fprintf(stderr, "jkl%cmno", '\0');
-  EXPECT_EQ(::std::string("jkl\0mno", 7), ::std::string(GetCapturedStderr()));
-}
-
-// Tests that stdout and stderr capture don't interfere with each other.
-TEST(CaptureTest, CapturesStdoutAndStderr) {
-  CaptureStdout();
-  CaptureStderr();
-  fprintf(stdout, "pqr");
-  fprintf(stderr, "stu");
-  EXPECT_STREQ("pqr", GetCapturedStdout().c_str());
-  EXPECT_STREQ("stu", GetCapturedStderr().c_str());
-}
-
-TEST(CaptureDeathTest, CannotReenterStdoutCapture) {
-  CaptureStdout();
-  EXPECT_DEATH_IF_SUPPORTED(CaptureStdout(),
-                            "Only one stdout capturer can exist at a time");
-  GetCapturedStdout();
-
-  // We cannot test stderr capturing using death tests as they use it
-  // themselves.
-}
-
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-TEST(ThreadLocalTest, DefaultConstructorInitializesToDefaultValues) {
-  ThreadLocal<int> t1;
-  EXPECT_EQ(0, t1.get());
-
-  ThreadLocal<void*> t2;
-  EXPECT_TRUE(t2.get() == nullptr);
-}
-
-TEST(ThreadLocalTest, SingleParamConstructorInitializesToParam) {
-  ThreadLocal<int> t1(123);
-  EXPECT_EQ(123, t1.get());
-
-  int i = 0;
-  ThreadLocal<int*> t2(&i);
-  EXPECT_EQ(&i, t2.get());
-}
-
-class NoDefaultContructor {
- public:
-  explicit NoDefaultContructor(const char*) {}
-  NoDefaultContructor(const NoDefaultContructor&) {}
-};
-
-TEST(ThreadLocalTest, ValueDefaultContructorIsNotRequiredForParamVersion) {
-  ThreadLocal<NoDefaultContructor> bar(NoDefaultContructor("foo"));
-  bar.pointer();
-}
-
-TEST(ThreadLocalTest, GetAndPointerReturnSameValue) {
-  ThreadLocal<std::string> thread_local_string;
-
-  EXPECT_EQ(thread_local_string.pointer(), &(thread_local_string.get()));
-
-  // Verifies the condition still holds after calling set.
-  thread_local_string.set("foo");
-  EXPECT_EQ(thread_local_string.pointer(), &(thread_local_string.get()));
-}
-
-TEST(ThreadLocalTest, PointerAndConstPointerReturnSameValue) {
-  ThreadLocal<std::string> thread_local_string;
-  const ThreadLocal<std::string>& const_thread_local_string =
-      thread_local_string;
-
-  EXPECT_EQ(thread_local_string.pointer(), const_thread_local_string.pointer());
-
-  thread_local_string.set("foo");
-  EXPECT_EQ(thread_local_string.pointer(), const_thread_local_string.pointer());
-}
-
-#if GTEST_IS_THREADSAFE
-
-void AddTwo(int* param) { *param += 2; }
-
-TEST(ThreadWithParamTest, ConstructorExecutesThreadFunc) {
-  int i = 40;
-  ThreadWithParam<int*> thread(&AddTwo, &i, nullptr);
-  thread.Join();
-  EXPECT_EQ(42, i);
-}
-
-TEST(MutexDeathTest, AssertHeldShouldAssertWhenNotLocked) {
-  // AssertHeld() is flaky only in the presence of multiple threads accessing
-  // the lock. In this case, the test is robust.
-  EXPECT_DEATH_IF_SUPPORTED({
-    Mutex m;
-    { MutexLock lock(&m); }
-    m.AssertHeld();
-  },
-  "thread .*hold");
-}
-
-TEST(MutexTest, AssertHeldShouldNotAssertWhenLocked) {
-  Mutex m;
-  MutexLock lock(&m);
-  m.AssertHeld();
-}
-
-class AtomicCounterWithMutex {
- public:
-  explicit AtomicCounterWithMutex(Mutex* mutex) :
-    value_(0), mutex_(mutex), random_(42) {}
-
-  void Increment() {
-    MutexLock lock(mutex_);
-    int temp = value_;
-    {
-      // We need to put up a memory barrier to prevent reads and writes to
-      // value_ rearranged with the call to SleepMilliseconds when observed
-      // from other threads.
-#if GTEST_HAS_PTHREAD
-      // On POSIX, locking a mutex puts up a memory barrier.  We cannot use
-      // Mutex and MutexLock here or rely on their memory barrier
-      // functionality as we are testing them here.
-      pthread_mutex_t memory_barrier_mutex;
-      GTEST_CHECK_POSIX_SUCCESS_(
-          pthread_mutex_init(&memory_barrier_mutex, nullptr));
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&memory_barrier_mutex));
-
-      SleepMilliseconds(static_cast<int>(random_.Generate(30)));
-
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&memory_barrier_mutex));
-      GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&memory_barrier_mutex));
-#elif GTEST_OS_WINDOWS
-      // On Windows, performing an interlocked access puts up a memory barrier.
-      volatile LONG dummy = 0;
-      ::InterlockedIncrement(&dummy);
-      SleepMilliseconds(static_cast<int>(random_.Generate(30)));
-      ::InterlockedIncrement(&dummy);
-#else
-# error "Memory barrier not implemented on this platform."
-#endif  // GTEST_HAS_PTHREAD
-    }
-    value_ = temp + 1;
-  }
-  int value() const { return value_; }
-
- private:
-  volatile int value_;
-  Mutex* const mutex_;  // Protects value_.
-  Random       random_;
-};
-
-void CountingThreadFunc(pair<AtomicCounterWithMutex*, int> param) {
-  for (int i = 0; i < param.second; ++i)
-      param.first->Increment();
-}
-
-// Tests that the mutex only lets one thread at a time to lock it.
-TEST(MutexTest, OnlyOneThreadCanLockAtATime) {
-  Mutex mutex;
-  AtomicCounterWithMutex locked_counter(&mutex);
-
-  typedef ThreadWithParam<pair<AtomicCounterWithMutex*, int> > ThreadType;
-  const int kCycleCount = 20;
-  const int kThreadCount = 7;
-  std::unique_ptr<ThreadType> counting_threads[kThreadCount];
-  Notification threads_can_start;
-  // Creates and runs kThreadCount threads that increment locked_counter
-  // kCycleCount times each.
-  for (int i = 0; i < kThreadCount; ++i) {
-    counting_threads[i].reset(new ThreadType(&CountingThreadFunc,
-                                             make_pair(&locked_counter,
-                                                       kCycleCount),
-                                             &threads_can_start));
-  }
-  threads_can_start.Notify();
-  for (int i = 0; i < kThreadCount; ++i)
-    counting_threads[i]->Join();
-
-  // If the mutex lets more than one thread to increment the counter at a
-  // time, they are likely to encounter a race condition and have some
-  // increments overwritten, resulting in the lower then expected counter
-  // value.
-  EXPECT_EQ(kCycleCount * kThreadCount, locked_counter.value());
-}
-
-template <typename T>
-void RunFromThread(void (func)(T), T param) {
-  ThreadWithParam<T> thread(func, param, nullptr);
-  thread.Join();
-}
-
-void RetrieveThreadLocalValue(
-    pair<ThreadLocal<std::string>*, std::string*> param) {
-  *param.second = param.first->get();
-}
-
-TEST(ThreadLocalTest, ParameterizedConstructorSetsDefault) {
-  ThreadLocal<std::string> thread_local_string("foo");
-  EXPECT_STREQ("foo", thread_local_string.get().c_str());
-
-  thread_local_string.set("bar");
-  EXPECT_STREQ("bar", thread_local_string.get().c_str());
-
-  std::string result;
-  RunFromThread(&RetrieveThreadLocalValue,
-                make_pair(&thread_local_string, &result));
-  EXPECT_STREQ("foo", result.c_str());
-}
-
-// Keeps track of whether of destructors being called on instances of
-// DestructorTracker.  On Windows, waits for the destructor call reports.
-class DestructorCall {
- public:
-  DestructorCall() {
-    invoked_ = false;
-#if GTEST_OS_WINDOWS
-    wait_event_.Reset(::CreateEvent(NULL, TRUE, FALSE, NULL));
-    GTEST_CHECK_(wait_event_.Get() != NULL);
-#endif
-  }
-
-  bool CheckDestroyed() const {
-#if GTEST_OS_WINDOWS
-    if (::WaitForSingleObject(wait_event_.Get(), 1000) != WAIT_OBJECT_0)
-      return false;
-#endif
-    return invoked_;
-  }
-
-  void ReportDestroyed() {
-    invoked_ = true;
-#if GTEST_OS_WINDOWS
-    ::SetEvent(wait_event_.Get());
-#endif
-  }
-
-  static std::vector<DestructorCall*>& List() { return *list_; }
-
-  static void ResetList() {
-    for (size_t i = 0; i < list_->size(); ++i) {
-      delete list_->at(i);
-    }
-    list_->clear();
-  }
-
- private:
-  bool invoked_;
-#if GTEST_OS_WINDOWS
-  AutoHandle wait_event_;
-#endif
-  static std::vector<DestructorCall*>* const list_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(DestructorCall);
-};
-
-std::vector<DestructorCall*>* const DestructorCall::list_ =
-    new std::vector<DestructorCall*>;
-
-// DestructorTracker keeps track of whether its instances have been
-// destroyed.
-class DestructorTracker {
- public:
-  DestructorTracker() : index_(GetNewIndex()) {}
-  DestructorTracker(const DestructorTracker& /* rhs */)
-      : index_(GetNewIndex()) {}
-  ~DestructorTracker() {
-    // We never access DestructorCall::List() concurrently, so we don't need
-    // to protect this access with a mutex.
-    DestructorCall::List()[index_]->ReportDestroyed();
-  }
-
- private:
-  static size_t GetNewIndex() {
-    DestructorCall::List().push_back(new DestructorCall);
-    return DestructorCall::List().size() - 1;
-  }
-  const size_t index_;
-
-  GTEST_DISALLOW_ASSIGN_(DestructorTracker);
-};
-
-typedef ThreadLocal<DestructorTracker>* ThreadParam;
-
-void CallThreadLocalGet(ThreadParam thread_local_param) {
-  thread_local_param->get();
-}
-
-// Tests that when a ThreadLocal object dies in a thread, it destroys
-// the managed object for that thread.
-TEST(ThreadLocalTest, DestroysManagedObjectForOwnThreadWhenDying) {
-  DestructorCall::ResetList();
-
-  {
-    ThreadLocal<DestructorTracker> thread_local_tracker;
-    ASSERT_EQ(0U, DestructorCall::List().size());
-
-    // This creates another DestructorTracker object for the main thread.
-    thread_local_tracker.get();
-    ASSERT_EQ(1U, DestructorCall::List().size());
-    ASSERT_FALSE(DestructorCall::List()[0]->CheckDestroyed());
-  }
-
-  // Now thread_local_tracker has died.
-  ASSERT_EQ(1U, DestructorCall::List().size());
-  EXPECT_TRUE(DestructorCall::List()[0]->CheckDestroyed());
-
-  DestructorCall::ResetList();
-}
-
-// Tests that when a thread exits, the thread-local object for that
-// thread is destroyed.
-TEST(ThreadLocalTest, DestroysManagedObjectAtThreadExit) {
-  DestructorCall::ResetList();
-
-  {
-    ThreadLocal<DestructorTracker> thread_local_tracker;
-    ASSERT_EQ(0U, DestructorCall::List().size());
-
-    // This creates another DestructorTracker object in the new thread.
-    ThreadWithParam<ThreadParam> thread(&CallThreadLocalGet,
-                                        &thread_local_tracker, nullptr);
-    thread.Join();
-
-    // The thread has exited, and we should have a DestroyedTracker
-    // instance created for it. But it may not have been destroyed yet.
-    ASSERT_EQ(1U, DestructorCall::List().size());
-  }
-
-  // The thread has exited and thread_local_tracker has died.
-  ASSERT_EQ(1U, DestructorCall::List().size());
-  EXPECT_TRUE(DestructorCall::List()[0]->CheckDestroyed());
-
-  DestructorCall::ResetList();
-}
-
-TEST(ThreadLocalTest, ThreadLocalMutationsAffectOnlyCurrentThread) {
-  ThreadLocal<std::string> thread_local_string;
-  thread_local_string.set("Foo");
-  EXPECT_STREQ("Foo", thread_local_string.get().c_str());
-
-  std::string result;
-  RunFromThread(&RetrieveThreadLocalValue,
-                make_pair(&thread_local_string, &result));
-  EXPECT_TRUE(result.empty());
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-#if GTEST_OS_WINDOWS
-TEST(WindowsTypesTest, HANDLEIsVoidStar) {
-  StaticAssertTypeEq<HANDLE, void*>();
-}
-
-#if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
-TEST(WindowsTypesTest, _CRITICAL_SECTIONIs_CRITICAL_SECTION) {
-  StaticAssertTypeEq<CRITICAL_SECTION, _CRITICAL_SECTION>();
-}
-#else
-TEST(WindowsTypesTest, CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION) {
-  StaticAssertTypeEq<CRITICAL_SECTION, _RTL_CRITICAL_SECTION>();
-}
-#endif
-
-#endif  // GTEST_OS_WINDOWS
-
-}  // namespace internal
-}  // namespace testing
diff --git a/3rdparty/gtest/test/googletest-printers-test.cc b/3rdparty/gtest/test/googletest-printers-test.cc
deleted file mode 100644
index 4bdc9add..00000000
--- a/3rdparty/gtest/test/googletest-printers-test.cc
+++ /dev/null
@@ -1,1620 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Google Test - The Google C++ Testing and Mocking Framework
-//
-// This file tests the universal value printer.
-
-#include <ctype.h>
-#include <limits.h>
-#include <string.h>
-#include <algorithm>
-#include <deque>
-#include <forward_list>
-#include <list>
-#include <map>
-#include <set>
-#include <sstream>
-#include <string>
-#include <unordered_map>
-#include <unordered_set>
-#include <utility>
-#include <vector>
-
-#include "gtest/gtest-printers.h"
-#include "gtest/gtest.h"
-
-// Some user-defined types for testing the universal value printer.
-
-// An anonymous enum type.
-enum AnonymousEnum {
-  kAE1 = -1,
-  kAE2 = 1
-};
-
-// An enum without a user-defined printer.
-enum EnumWithoutPrinter {
-  kEWP1 = -2,
-  kEWP2 = 42
-};
-
-// An enum with a << operator.
-enum EnumWithStreaming {
-  kEWS1 = 10
-};
-
-std::ostream& operator<<(std::ostream& os, EnumWithStreaming e) {
-  return os << (e == kEWS1 ? "kEWS1" : "invalid");
-}
-
-// An enum with a PrintTo() function.
-enum EnumWithPrintTo {
-  kEWPT1 = 1
-};
-
-void PrintTo(EnumWithPrintTo e, std::ostream* os) {
-  *os << (e == kEWPT1 ? "kEWPT1" : "invalid");
-}
-
-// A class implicitly convertible to BiggestInt.
-class BiggestIntConvertible {
- public:
-  operator ::testing::internal::BiggestInt() const { return 42; }
-};
-
-// A user-defined unprintable class template in the global namespace.
-template <typename T>
-class UnprintableTemplateInGlobal {
- public:
-  UnprintableTemplateInGlobal() : value_() {}
- private:
-  T value_;
-};
-
-// A user-defined streamable type in the global namespace.
-class StreamableInGlobal {
- public:
-  virtual ~StreamableInGlobal() {}
-};
-
-inline void operator<<(::std::ostream& os, const StreamableInGlobal& /* x */) {
-  os << "StreamableInGlobal";
-}
-
-void operator<<(::std::ostream& os, const StreamableInGlobal* /* x */) {
-  os << "StreamableInGlobal*";
-}
-
-namespace foo {
-
-// A user-defined unprintable type in a user namespace.
-class UnprintableInFoo {
- public:
-  UnprintableInFoo() : z_(0) { memcpy(xy_, "\xEF\x12\x0\x0\x34\xAB\x0\x0", 8); }
-  double z() const { return z_; }
- private:
-  char xy_[8];
-  double z_;
-};
-
-// A user-defined printable type in a user-chosen namespace.
-struct PrintableViaPrintTo {
-  PrintableViaPrintTo() : value() {}
-  int value;
-};
-
-void PrintTo(const PrintableViaPrintTo& x, ::std::ostream* os) {
-  *os << "PrintableViaPrintTo: " << x.value;
-}
-
-// A type with a user-defined << for printing its pointer.
-struct PointerPrintable {
-};
-
-::std::ostream& operator<<(::std::ostream& os,
-                           const PointerPrintable* /* x */) {
-  return os << "PointerPrintable*";
-}
-
-// A user-defined printable class template in a user-chosen namespace.
-template <typename T>
-class PrintableViaPrintToTemplate {
- public:
-  explicit PrintableViaPrintToTemplate(const T& a_value) : value_(a_value) {}
-
-  const T& value() const { return value_; }
- private:
-  T value_;
-};
-
-template <typename T>
-void PrintTo(const PrintableViaPrintToTemplate<T>& x, ::std::ostream* os) {
-  *os << "PrintableViaPrintToTemplate: " << x.value();
-}
-
-// A user-defined streamable class template in a user namespace.
-template <typename T>
-class StreamableTemplateInFoo {
- public:
-  StreamableTemplateInFoo() : value_() {}
-
-  const T& value() const { return value_; }
- private:
-  T value_;
-};
-
-template <typename T>
-inline ::std::ostream& operator<<(::std::ostream& os,
-                                  const StreamableTemplateInFoo<T>& x) {
-  return os << "StreamableTemplateInFoo: " << x.value();
-}
-
-// A user-defined streamable but recursivly-defined container type in
-// a user namespace, it mimics therefore std::filesystem::path or
-// boost::filesystem::path.
-class PathLike {
- public:
-  struct iterator {
-    typedef PathLike value_type;
-
-    iterator& operator++();
-    PathLike& operator*();
-  };
-
-  using value_type = char;
-  using const_iterator = iterator;
-
-  PathLike() {}
-
-  iterator begin() const { return iterator(); }
-  iterator end() const { return iterator(); }
-
-  friend ::std::ostream& operator<<(::std::ostream& os, const PathLike&) {
-    return os << "Streamable-PathLike";
-  }
-};
-
-}  // namespace foo
-
-namespace testing {
-namespace gtest_printers_test {
-
-using ::std::deque;
-using ::std::list;
-using ::std::make_pair;
-using ::std::map;
-using ::std::multimap;
-using ::std::multiset;
-using ::std::pair;
-using ::std::set;
-using ::std::vector;
-using ::testing::PrintToString;
-using ::testing::internal::FormatForComparisonFailureMessage;
-using ::testing::internal::ImplicitCast_;
-using ::testing::internal::NativeArray;
-using ::testing::internal::RE;
-using ::testing::internal::RelationToSourceReference;
-using ::testing::internal::Strings;
-using ::testing::internal::UniversalPrint;
-using ::testing::internal::UniversalPrinter;
-using ::testing::internal::UniversalTersePrint;
-using ::testing::internal::UniversalTersePrintTupleFieldsToStrings;
-
-// Prints a value to a string using the universal value printer.  This
-// is a helper for testing UniversalPrinter<T>::Print() for various types.
-template <typename T>
-std::string Print(const T& value) {
-  ::std::stringstream ss;
-  UniversalPrinter<T>::Print(value, &ss);
-  return ss.str();
-}
-
-// Prints a value passed by reference to a string, using the universal
-// value printer.  This is a helper for testing
-// UniversalPrinter<T&>::Print() for various types.
-template <typename T>
-std::string PrintByRef(const T& value) {
-  ::std::stringstream ss;
-  UniversalPrinter<T&>::Print(value, &ss);
-  return ss.str();
-}
-
-// Tests printing various enum types.
-
-TEST(PrintEnumTest, AnonymousEnum) {
-  EXPECT_EQ("-1", Print(kAE1));
-  EXPECT_EQ("1", Print(kAE2));
-}
-
-TEST(PrintEnumTest, EnumWithoutPrinter) {
-  EXPECT_EQ("-2", Print(kEWP1));
-  EXPECT_EQ("42", Print(kEWP2));
-}
-
-TEST(PrintEnumTest, EnumWithStreaming) {
-  EXPECT_EQ("kEWS1", Print(kEWS1));
-  EXPECT_EQ("invalid", Print(static_cast<EnumWithStreaming>(0)));
-}
-
-TEST(PrintEnumTest, EnumWithPrintTo) {
-  EXPECT_EQ("kEWPT1", Print(kEWPT1));
-  EXPECT_EQ("invalid", Print(static_cast<EnumWithPrintTo>(0)));
-}
-
-// Tests printing a class implicitly convertible to BiggestInt.
-
-TEST(PrintClassTest, BiggestIntConvertible) {
-  EXPECT_EQ("42", Print(BiggestIntConvertible()));
-}
-
-// Tests printing various char types.
-
-// char.
-TEST(PrintCharTest, PlainChar) {
-  EXPECT_EQ("'\\0'", Print('\0'));
-  EXPECT_EQ("'\\'' (39, 0x27)", Print('\''));
-  EXPECT_EQ("'\"' (34, 0x22)", Print('"'));
-  EXPECT_EQ("'?' (63, 0x3F)", Print('?'));
-  EXPECT_EQ("'\\\\' (92, 0x5C)", Print('\\'));
-  EXPECT_EQ("'\\a' (7)", Print('\a'));
-  EXPECT_EQ("'\\b' (8)", Print('\b'));
-  EXPECT_EQ("'\\f' (12, 0xC)", Print('\f'));
-  EXPECT_EQ("'\\n' (10, 0xA)", Print('\n'));
-  EXPECT_EQ("'\\r' (13, 0xD)", Print('\r'));
-  EXPECT_EQ("'\\t' (9)", Print('\t'));
-  EXPECT_EQ("'\\v' (11, 0xB)", Print('\v'));
-  EXPECT_EQ("'\\x7F' (127)", Print('\x7F'));
-  EXPECT_EQ("'\\xFF' (255)", Print('\xFF'));
-  EXPECT_EQ("' ' (32, 0x20)", Print(' '));
-  EXPECT_EQ("'a' (97, 0x61)", Print('a'));
-}
-
-// signed char.
-TEST(PrintCharTest, SignedChar) {
-  EXPECT_EQ("'\\0'", Print(static_cast<signed char>('\0')));
-  EXPECT_EQ("'\\xCE' (-50)",
-            Print(static_cast<signed char>(-50)));
-}
-
-// unsigned char.
-TEST(PrintCharTest, UnsignedChar) {
-  EXPECT_EQ("'\\0'", Print(static_cast<unsigned char>('\0')));
-  EXPECT_EQ("'b' (98, 0x62)",
-            Print(static_cast<unsigned char>('b')));
-}
-
-// Tests printing other simple, built-in types.
-
-// bool.
-TEST(PrintBuiltInTypeTest, Bool) {
-  EXPECT_EQ("false", Print(false));
-  EXPECT_EQ("true", Print(true));
-}
-
-// wchar_t.
-TEST(PrintBuiltInTypeTest, Wchar_t) {
-  EXPECT_EQ("L'\\0'", Print(L'\0'));
-  EXPECT_EQ("L'\\'' (39, 0x27)", Print(L'\''));
-  EXPECT_EQ("L'\"' (34, 0x22)", Print(L'"'));
-  EXPECT_EQ("L'?' (63, 0x3F)", Print(L'?'));
-  EXPECT_EQ("L'\\\\' (92, 0x5C)", Print(L'\\'));
-  EXPECT_EQ("L'\\a' (7)", Print(L'\a'));
-  EXPECT_EQ("L'\\b' (8)", Print(L'\b'));
-  EXPECT_EQ("L'\\f' (12, 0xC)", Print(L'\f'));
-  EXPECT_EQ("L'\\n' (10, 0xA)", Print(L'\n'));
-  EXPECT_EQ("L'\\r' (13, 0xD)", Print(L'\r'));
-  EXPECT_EQ("L'\\t' (9)", Print(L'\t'));
-  EXPECT_EQ("L'\\v' (11, 0xB)", Print(L'\v'));
-  EXPECT_EQ("L'\\x7F' (127)", Print(L'\x7F'));
-  EXPECT_EQ("L'\\xFF' (255)", Print(L'\xFF'));
-  EXPECT_EQ("L' ' (32, 0x20)", Print(L' '));
-  EXPECT_EQ("L'a' (97, 0x61)", Print(L'a'));
-  EXPECT_EQ("L'\\x576' (1398)", Print(static_cast<wchar_t>(0x576)));
-  EXPECT_EQ("L'\\xC74D' (51021)", Print(static_cast<wchar_t>(0xC74D)));
-}
-
-// Test that Int64 provides more storage than wchar_t.
-TEST(PrintTypeSizeTest, Wchar_t) {
-  EXPECT_LT(sizeof(wchar_t), sizeof(testing::internal::Int64));
-}
-
-// Various integer types.
-TEST(PrintBuiltInTypeTest, Integer) {
-  EXPECT_EQ("'\\xFF' (255)", Print(static_cast<unsigned char>(255)));  // uint8
-  EXPECT_EQ("'\\x80' (-128)", Print(static_cast<signed char>(-128)));  // int8
-  EXPECT_EQ("65535", Print(USHRT_MAX));  // uint16
-  EXPECT_EQ("-32768", Print(SHRT_MIN));  // int16
-  EXPECT_EQ("4294967295", Print(UINT_MAX));  // uint32
-  EXPECT_EQ("-2147483648", Print(INT_MIN));  // int32
-  EXPECT_EQ("18446744073709551615",
-            Print(static_cast<testing::internal::UInt64>(-1)));  // uint64
-  EXPECT_EQ("-9223372036854775808",
-            Print(static_cast<testing::internal::Int64>(1) << 63));  // int64
-}
-
-// Size types.
-TEST(PrintBuiltInTypeTest, Size_t) {
-  EXPECT_EQ("1", Print(sizeof('a')));  // size_t.
-#if !GTEST_OS_WINDOWS
-  // Windows has no ssize_t type.
-  EXPECT_EQ("-2", Print(static_cast<ssize_t>(-2)));  // ssize_t.
-#endif  // !GTEST_OS_WINDOWS
-}
-
-// Floating-points.
-TEST(PrintBuiltInTypeTest, FloatingPoints) {
-  EXPECT_EQ("1.5", Print(1.5f));   // float
-  EXPECT_EQ("-2.5", Print(-2.5));  // double
-}
-
-// Since ::std::stringstream::operator<<(const void *) formats the pointer
-// output differently with different compilers, we have to create the expected
-// output first and use it as our expectation.
-static std::string PrintPointer(const void* p) {
-  ::std::stringstream expected_result_stream;
-  expected_result_stream << p;
-  return expected_result_stream.str();
-}
-
-// Tests printing C strings.
-
-// const char*.
-TEST(PrintCStringTest, Const) {
-  const char* p = "World";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"World\"", Print(p));
-}
-
-// char*.
-TEST(PrintCStringTest, NonConst) {
-  char p[] = "Hi";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"Hi\"",
-            Print(static_cast<char*>(p)));
-}
-
-// NULL C string.
-TEST(PrintCStringTest, Null) {
-  const char* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that C strings are escaped properly.
-TEST(PrintCStringTest, EscapesProperly) {
-  const char* p = "'\"?\\\a\b\f\n\r\t\v\x7F\xFF a";
-  EXPECT_EQ(PrintPointer(p) + " pointing to \"'\\\"?\\\\\\a\\b\\f"
-            "\\n\\r\\t\\v\\x7F\\xFF a\"",
-            Print(p));
-}
-
-// MSVC compiler can be configured to define whar_t as a typedef
-// of unsigned short. Defining an overload for const wchar_t* in that case
-// would cause pointers to unsigned shorts be printed as wide strings,
-// possibly accessing more memory than intended and causing invalid
-// memory accesses. MSVC defines _NATIVE_WCHAR_T_DEFINED symbol when
-// wchar_t is implemented as a native type.
-#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
-
-// const wchar_t*.
-TEST(PrintWideCStringTest, Const) {
-  const wchar_t* p = L"World";
-  EXPECT_EQ(PrintPointer(p) + " pointing to L\"World\"", Print(p));
-}
-
-// wchar_t*.
-TEST(PrintWideCStringTest, NonConst) {
-  wchar_t p[] = L"Hi";
-  EXPECT_EQ(PrintPointer(p) + " pointing to L\"Hi\"",
-            Print(static_cast<wchar_t*>(p)));
-}
-
-// NULL wide C string.
-TEST(PrintWideCStringTest, Null) {
-  const wchar_t* p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests that wide C strings are escaped properly.
-TEST(PrintWideCStringTest, EscapesProperly) {
-  const wchar_t s[] = {'\'', '"', '?', '\\', '\a', '\b', '\f', '\n', '\r',
-                       '\t', '\v', 0xD3, 0x576, 0x8D3, 0xC74D, ' ', 'a', '\0'};
-  EXPECT_EQ(PrintPointer(s) + " pointing to L\"'\\\"?\\\\\\a\\b\\f"
-            "\\n\\r\\t\\v\\xD3\\x576\\x8D3\\xC74D a\"",
-            Print(static_cast<const wchar_t*>(s)));
-}
-#endif  // native wchar_t
-
-// Tests printing pointers to other char types.
-
-// signed char*.
-TEST(PrintCharPointerTest, SignedChar) {
-  signed char* p = reinterpret_cast<signed char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const signed char*.
-TEST(PrintCharPointerTest, ConstSignedChar) {
-  signed char* p = reinterpret_cast<signed char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// unsigned char*.
-TEST(PrintCharPointerTest, UnsignedChar) {
-  unsigned char* p = reinterpret_cast<unsigned char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const unsigned char*.
-TEST(PrintCharPointerTest, ConstUnsignedChar) {
-  const unsigned char* p = reinterpret_cast<const unsigned char*>(0x1234);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing pointers to simple, built-in types.
-
-// bool*.
-TEST(PrintPointerToBuiltInTypeTest, Bool) {
-  bool* p = reinterpret_cast<bool*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// void*.
-TEST(PrintPointerToBuiltInTypeTest, Void) {
-  void* p = reinterpret_cast<void*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// const void*.
-TEST(PrintPointerToBuiltInTypeTest, ConstVoid) {
-  const void* p = reinterpret_cast<const void*>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing pointers to pointers.
-TEST(PrintPointerToPointerTest, IntPointerPointer) {
-  int** p = reinterpret_cast<int**>(0xABCD);
-  EXPECT_EQ(PrintPointer(p), Print(p));
-  p = nullptr;
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// Tests printing (non-member) function pointers.
-
-void MyFunction(int /* n */) {}
-
-TEST(PrintPointerTest, NonMemberFunctionPointer) {
-  // We cannot directly cast &MyFunction to const void* because the
-  // standard disallows casting between pointers to functions and
-  // pointers to objects, and some compilers (e.g. GCC 3.4) enforce
-  // this limitation.
-  EXPECT_EQ(
-      PrintPointer(reinterpret_cast<const void*>(
-          reinterpret_cast<internal::BiggestInt>(&MyFunction))),
-      Print(&MyFunction));
-  int (*p)(bool) = NULL;  // NOLINT
-  EXPECT_EQ("NULL", Print(p));
-}
-
-// An assertion predicate determining whether a one string is a prefix for
-// another.
-template <typename StringType>
-AssertionResult HasPrefix(const StringType& str, const StringType& prefix) {
-  if (str.find(prefix, 0) == 0)
-    return AssertionSuccess();
-
-  const bool is_wide_string = sizeof(prefix[0]) > 1;
-  const char* const begin_string_quote = is_wide_string ? "L\"" : "\"";
-  return AssertionFailure()
-      << begin_string_quote << prefix << "\" is not a prefix of "
-      << begin_string_quote << str << "\"\n";
-}
-
-// Tests printing member variable pointers.  Although they are called
-// pointers, they don't point to a location in the address space.
-// Their representation is implementation-defined.  Thus they will be
-// printed as raw bytes.
-
-struct Foo {
- public:
-  virtual ~Foo() {}
-  int MyMethod(char x) { return x + 1; }
-  virtual char MyVirtualMethod(int /* n */) { return 'a'; }
-
-  int value;
-};
-
-TEST(PrintPointerTest, MemberVariablePointer) {
-  EXPECT_TRUE(HasPrefix(Print(&Foo::value),
-                        Print(sizeof(&Foo::value)) + "-byte object "));
-  int Foo::*p = NULL;  // NOLINT
-  EXPECT_TRUE(HasPrefix(Print(p),
-                        Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests printing member function pointers.  Although they are called
-// pointers, they don't point to a location in the address space.
-// Their representation is implementation-defined.  Thus they will be
-// printed as raw bytes.
-TEST(PrintPointerTest, MemberFunctionPointer) {
-  EXPECT_TRUE(HasPrefix(Print(&Foo::MyMethod),
-                        Print(sizeof(&Foo::MyMethod)) + "-byte object "));
-  EXPECT_TRUE(
-      HasPrefix(Print(&Foo::MyVirtualMethod),
-                Print(sizeof((&Foo::MyVirtualMethod))) + "-byte object "));
-  int (Foo::*p)(char) = NULL;  // NOLINT
-  EXPECT_TRUE(HasPrefix(Print(p),
-                        Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests printing C arrays.
-
-// The difference between this and Print() is that it ensures that the
-// argument is a reference to an array.
-template <typename T, size_t N>
-std::string PrintArrayHelper(T (&a)[N]) {
-  return Print(a);
-}
-
-// One-dimensional array.
-TEST(PrintArrayTest, OneDimensionalArray) {
-  int a[5] = { 1, 2, 3, 4, 5 };
-  EXPECT_EQ("{ 1, 2, 3, 4, 5 }", PrintArrayHelper(a));
-}
-
-// Two-dimensional array.
-TEST(PrintArrayTest, TwoDimensionalArray) {
-  int a[2][5] = {
-    { 1, 2, 3, 4, 5 },
-    { 6, 7, 8, 9, 0 }
-  };
-  EXPECT_EQ("{ { 1, 2, 3, 4, 5 }, { 6, 7, 8, 9, 0 } }", PrintArrayHelper(a));
-}
-
-// Array of const elements.
-TEST(PrintArrayTest, ConstArray) {
-  const bool a[1] = { false };
-  EXPECT_EQ("{ false }", PrintArrayHelper(a));
-}
-
-// char array without terminating NUL.
-TEST(PrintArrayTest, CharArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  char a[] = { 'H', '\0', 'i' };
-  EXPECT_EQ("\"H\\0i\" (no terminating NUL)", PrintArrayHelper(a));
-}
-
-// const char array with terminating NUL.
-TEST(PrintArrayTest, ConstCharArrayWithTerminatingNul) {
-  const char a[] = "\0Hi";
-  EXPECT_EQ("\"\\0Hi\"", PrintArrayHelper(a));
-}
-
-// const wchar_t array without terminating NUL.
-TEST(PrintArrayTest, WCharArrayWithNoTerminatingNul) {
-  // Array a contains '\0' in the middle and doesn't end with '\0'.
-  const wchar_t a[] = { L'H', L'\0', L'i' };
-  EXPECT_EQ("L\"H\\0i\" (no terminating NUL)", PrintArrayHelper(a));
-}
-
-// wchar_t array with terminating NUL.
-TEST(PrintArrayTest, WConstCharArrayWithTerminatingNul) {
-  const wchar_t a[] = L"\0Hi";
-  EXPECT_EQ("L\"\\0Hi\"", PrintArrayHelper(a));
-}
-
-// Array of objects.
-TEST(PrintArrayTest, ObjectArray) {
-  std::string a[3] = {"Hi", "Hello", "Ni hao"};
-  EXPECT_EQ("{ \"Hi\", \"Hello\", \"Ni hao\" }", PrintArrayHelper(a));
-}
-
-// Array with many elements.
-TEST(PrintArrayTest, BigArray) {
-  int a[100] = { 1, 2, 3 };
-  EXPECT_EQ("{ 1, 2, 3, 0, 0, 0, 0, 0, ..., 0, 0, 0, 0, 0, 0, 0, 0 }",
-            PrintArrayHelper(a));
-}
-
-// Tests printing ::string and ::std::string.
-
-// ::std::string.
-TEST(PrintStringTest, StringInStdNamespace) {
-  const char s[] = "'\"?\\\a\b\f\n\0\r\t\v\x7F\xFF a";
-  const ::std::string str(s, sizeof(s));
-  EXPECT_EQ("\"'\\\"?\\\\\\a\\b\\f\\n\\0\\r\\t\\v\\x7F\\xFF a\\0\"",
-            Print(str));
-}
-
-TEST(PrintStringTest, StringAmbiguousHex) {
-  // "\x6BANANA" is ambiguous, it can be interpreted as starting with either of:
-  // '\x6', '\x6B', or '\x6BA'.
-
-  // a hex escaping sequence following by a decimal digit
-  EXPECT_EQ("\"0\\x12\" \"3\"", Print(::std::string("0\x12" "3")));
-  // a hex escaping sequence following by a hex digit (lower-case)
-  EXPECT_EQ("\"mm\\x6\" \"bananas\"", Print(::std::string("mm\x6" "bananas")));
-  // a hex escaping sequence following by a hex digit (upper-case)
-  EXPECT_EQ("\"NOM\\x6\" \"BANANA\"", Print(::std::string("NOM\x6" "BANANA")));
-  // a hex escaping sequence following by a non-xdigit
-  EXPECT_EQ("\"!\\x5-!\"", Print(::std::string("!\x5-!")));
-}
-
-// Tests printing ::std::wstring.
-#if GTEST_HAS_STD_WSTRING
-// ::std::wstring.
-TEST(PrintWideStringTest, StringInStdNamespace) {
-  const wchar_t s[] = L"'\"?\\\a\b\f\n\0\r\t\v\xD3\x576\x8D3\xC74D a";
-  const ::std::wstring str(s, sizeof(s)/sizeof(wchar_t));
-  EXPECT_EQ("L\"'\\\"?\\\\\\a\\b\\f\\n\\0\\r\\t\\v"
-            "\\xD3\\x576\\x8D3\\xC74D a\\0\"",
-            Print(str));
-}
-
-TEST(PrintWideStringTest, StringAmbiguousHex) {
-  // same for wide strings.
-  EXPECT_EQ("L\"0\\x12\" L\"3\"", Print(::std::wstring(L"0\x12" L"3")));
-  EXPECT_EQ("L\"mm\\x6\" L\"bananas\"",
-            Print(::std::wstring(L"mm\x6" L"bananas")));
-  EXPECT_EQ("L\"NOM\\x6\" L\"BANANA\"",
-            Print(::std::wstring(L"NOM\x6" L"BANANA")));
-  EXPECT_EQ("L\"!\\x5-!\"", Print(::std::wstring(L"!\x5-!")));
-}
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests printing types that support generic streaming (i.e. streaming
-// to std::basic_ostream<Char, CharTraits> for any valid Char and
-// CharTraits types).
-
-// Tests printing a non-template type that supports generic streaming.
-
-class AllowsGenericStreaming {};
-
-template <typename Char, typename CharTraits>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreaming& /* a */) {
-  return os << "AllowsGenericStreaming";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, NonTemplateType) {
-  AllowsGenericStreaming a;
-  EXPECT_EQ("AllowsGenericStreaming", Print(a));
-}
-
-// Tests printing a template type that supports generic streaming.
-
-template <typename T>
-class AllowsGenericStreamingTemplate {};
-
-template <typename Char, typename CharTraits, typename T>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreamingTemplate<T>& /* a */) {
-  return os << "AllowsGenericStreamingTemplate";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, TemplateType) {
-  AllowsGenericStreamingTemplate<int> a;
-  EXPECT_EQ("AllowsGenericStreamingTemplate", Print(a));
-}
-
-// Tests printing a type that supports generic streaming and can be
-// implicitly converted to another printable type.
-
-template <typename T>
-class AllowsGenericStreamingAndImplicitConversionTemplate {
- public:
-  operator bool() const { return false; }
-};
-
-template <typename Char, typename CharTraits, typename T>
-std::basic_ostream<Char, CharTraits>& operator<<(
-    std::basic_ostream<Char, CharTraits>& os,
-    const AllowsGenericStreamingAndImplicitConversionTemplate<T>& /* a */) {
-  return os << "AllowsGenericStreamingAndImplicitConversionTemplate";
-}
-
-TEST(PrintTypeWithGenericStreamingTest, TypeImplicitlyConvertible) {
-  AllowsGenericStreamingAndImplicitConversionTemplate<int> a;
-  EXPECT_EQ("AllowsGenericStreamingAndImplicitConversionTemplate", Print(a));
-}
-
-#if GTEST_HAS_ABSL
-
-// Tests printing ::absl::string_view.
-
-TEST(PrintStringViewTest, SimpleStringView) {
-  const ::absl::string_view sp = "Hello";
-  EXPECT_EQ("\"Hello\"", Print(sp));
-}
-
-TEST(PrintStringViewTest, UnprintableCharacters) {
-  const char str[] = "NUL (\0) and \r\t";
-  const ::absl::string_view sp(str, sizeof(str) - 1);
-  EXPECT_EQ("\"NUL (\\0) and \\r\\t\"", Print(sp));
-}
-
-#endif  // GTEST_HAS_ABSL
-
-// Tests printing STL containers.
-
-TEST(PrintStlContainerTest, EmptyDeque) {
-  deque<char> empty;
-  EXPECT_EQ("{}", Print(empty));
-}
-
-TEST(PrintStlContainerTest, NonEmptyDeque) {
-  deque<int> non_empty;
-  non_empty.push_back(1);
-  non_empty.push_back(3);
-  EXPECT_EQ("{ 1, 3 }", Print(non_empty));
-}
-
-
-TEST(PrintStlContainerTest, OneElementHashMap) {
-  ::std::unordered_map<int, char> map1;
-  map1[1] = 'a';
-  EXPECT_EQ("{ (1, 'a' (97, 0x61)) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, HashMultiMap) {
-  ::std::unordered_multimap<int, bool> map1;
-  map1.insert(make_pair(5, true));
-  map1.insert(make_pair(5, false));
-
-  // Elements of hash_multimap can be printed in any order.
-  const std::string result = Print(map1);
-  EXPECT_TRUE(result == "{ (5, true), (5, false) }" ||
-              result == "{ (5, false), (5, true) }")
-                  << " where Print(map1) returns \"" << result << "\".";
-}
-
-
-
-TEST(PrintStlContainerTest, HashSet) {
-  ::std::unordered_set<int> set1;
-  set1.insert(1);
-  EXPECT_EQ("{ 1 }", Print(set1));
-}
-
-TEST(PrintStlContainerTest, HashMultiSet) {
-  const int kSize = 5;
-  int a[kSize] = { 1, 1, 2, 5, 1 };
-  ::std::unordered_multiset<int> set1(a, a + kSize);
-
-  // Elements of hash_multiset can be printed in any order.
-  const std::string result = Print(set1);
-  const std::string expected_pattern = "{ d, d, d, d, d }";  // d means a digit.
-
-  // Verifies the result matches the expected pattern; also extracts
-  // the numbers in the result.
-  ASSERT_EQ(expected_pattern.length(), result.length());
-  std::vector<int> numbers;
-  for (size_t i = 0; i != result.length(); i++) {
-    if (expected_pattern[i] == 'd') {
-      ASSERT_NE(isdigit(static_cast<unsigned char>(result[i])), 0);
-      numbers.push_back(result[i] - '0');
-    } else {
-      EXPECT_EQ(expected_pattern[i], result[i]) << " where result is "
-                                                << result;
-    }
-  }
-
-  // Makes sure the result contains the right numbers.
-  std::sort(numbers.begin(), numbers.end());
-  std::sort(a, a + kSize);
-  EXPECT_TRUE(std::equal(a, a + kSize, numbers.begin()));
-}
-
-
-TEST(PrintStlContainerTest, List) {
-  const std::string a[] = {"hello", "world"};
-  const list<std::string> strings(a, a + 2);
-  EXPECT_EQ("{ \"hello\", \"world\" }", Print(strings));
-}
-
-TEST(PrintStlContainerTest, Map) {
-  map<int, bool> map1;
-  map1[1] = true;
-  map1[5] = false;
-  map1[3] = true;
-  EXPECT_EQ("{ (1, true), (3, true), (5, false) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, MultiMap) {
-  multimap<bool, int> map1;
-  // The make_pair template function would deduce the type as
-  // pair<bool, int> here, and since the key part in a multimap has to
-  // be constant, without a templated ctor in the pair class (as in
-  // libCstd on Solaris), make_pair call would fail to compile as no
-  // implicit conversion is found.  Thus explicit typename is used
-  // here instead.
-  map1.insert(pair<const bool, int>(true, 0));
-  map1.insert(pair<const bool, int>(true, 1));
-  map1.insert(pair<const bool, int>(false, 2));
-  EXPECT_EQ("{ (false, 2), (true, 0), (true, 1) }", Print(map1));
-}
-
-TEST(PrintStlContainerTest, Set) {
-  const unsigned int a[] = { 3, 0, 5 };
-  set<unsigned int> set1(a, a + 3);
-  EXPECT_EQ("{ 0, 3, 5 }", Print(set1));
-}
-
-TEST(PrintStlContainerTest, MultiSet) {
-  const int a[] = { 1, 1, 2, 5, 1 };
-  multiset<int> set1(a, a + 5);
-  EXPECT_EQ("{ 1, 1, 1, 2, 5 }", Print(set1));
-}
-
-
-TEST(PrintStlContainerTest, SinglyLinkedList) {
-  int a[] = { 9, 2, 8 };
-  const std::forward_list<int> ints(a, a + 3);
-  EXPECT_EQ("{ 9, 2, 8 }", Print(ints));
-}
-
-TEST(PrintStlContainerTest, Pair) {
-  pair<const bool, int> p(true, 5);
-  EXPECT_EQ("(true, 5)", Print(p));
-}
-
-TEST(PrintStlContainerTest, Vector) {
-  vector<int> v;
-  v.push_back(1);
-  v.push_back(2);
-  EXPECT_EQ("{ 1, 2 }", Print(v));
-}
-
-TEST(PrintStlContainerTest, LongSequence) {
-  const int a[100] = { 1, 2, 3 };
-  const vector<int> v(a, a + 100);
-  EXPECT_EQ("{ 1, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, "
-            "0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ... }", Print(v));
-}
-
-TEST(PrintStlContainerTest, NestedContainer) {
-  const int a1[] = { 1, 2 };
-  const int a2[] = { 3, 4, 5 };
-  const list<int> l1(a1, a1 + 2);
-  const list<int> l2(a2, a2 + 3);
-
-  vector<list<int> > v;
-  v.push_back(l1);
-  v.push_back(l2);
-  EXPECT_EQ("{ { 1, 2 }, { 3, 4, 5 } }", Print(v));
-}
-
-TEST(PrintStlContainerTest, OneDimensionalNativeArray) {
-  const int a[3] = { 1, 2, 3 };
-  NativeArray<int> b(a, 3, RelationToSourceReference());
-  EXPECT_EQ("{ 1, 2, 3 }", Print(b));
-}
-
-TEST(PrintStlContainerTest, TwoDimensionalNativeArray) {
-  const int a[2][3] = { { 1, 2, 3 }, { 4, 5, 6 } };
-  NativeArray<int[3]> b(a, 2, RelationToSourceReference());
-  EXPECT_EQ("{ { 1, 2, 3 }, { 4, 5, 6 } }", Print(b));
-}
-
-// Tests that a class named iterator isn't treated as a container.
-
-struct iterator {
-  char x;
-};
-
-TEST(PrintStlContainerTest, Iterator) {
-  iterator it = {};
-  EXPECT_EQ("1-byte object <00>", Print(it));
-}
-
-// Tests that a class named const_iterator isn't treated as a container.
-
-struct const_iterator {
-  char x;
-};
-
-TEST(PrintStlContainerTest, ConstIterator) {
-  const_iterator it = {};
-  EXPECT_EQ("1-byte object <00>", Print(it));
-}
-
-// Tests printing ::std::tuples.
-
-// Tuples of various arities.
-TEST(PrintStdTupleTest, VariousSizes) {
-  ::std::tuple<> t0;
-  EXPECT_EQ("()", Print(t0));
-
-  ::std::tuple<int> t1(5);
-  EXPECT_EQ("(5)", Print(t1));
-
-  ::std::tuple<char, bool> t2('a', true);
-  EXPECT_EQ("('a' (97, 0x61), true)", Print(t2));
-
-  ::std::tuple<bool, int, int> t3(false, 2, 3);
-  EXPECT_EQ("(false, 2, 3)", Print(t3));
-
-  ::std::tuple<bool, int, int, int> t4(false, 2, 3, 4);
-  EXPECT_EQ("(false, 2, 3, 4)", Print(t4));
-
-  const char* const str = "8";
-  ::std::tuple<bool, char, short, testing::internal::Int32,  // NOLINT
-               testing::internal::Int64, float, double, const char*, void*,
-               std::string>
-      t10(false, 'a', static_cast<short>(3), 4, 5, 1.5F, -2.5, str,  // NOLINT
-          nullptr, "10");
-  EXPECT_EQ("(false, 'a' (97, 0x61), 3, 4, 5, 1.5, -2.5, " + PrintPointer(str) +
-            " pointing to \"8\", NULL, \"10\")",
-            Print(t10));
-}
-
-// Nested tuples.
-TEST(PrintStdTupleTest, NestedTuple) {
-  ::std::tuple< ::std::tuple<int, bool>, char> nested(
-      ::std::make_tuple(5, true), 'a');
-  EXPECT_EQ("((5, true), 'a' (97, 0x61))", Print(nested));
-}
-
-TEST(PrintNullptrT, Basic) {
-  EXPECT_EQ("(nullptr)", Print(nullptr));
-}
-
-TEST(PrintReferenceWrapper, Printable) {
-  int x = 5;
-  EXPECT_EQ("@" + PrintPointer(&x) + " 5", Print(std::ref(x)));
-  EXPECT_EQ("@" + PrintPointer(&x) + " 5", Print(std::cref(x)));
-}
-
-TEST(PrintReferenceWrapper, Unprintable) {
-  ::foo::UnprintableInFoo up;
-  EXPECT_EQ(
-      "@" + PrintPointer(&up) +
-          " 16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-      Print(std::ref(up)));
-  EXPECT_EQ(
-      "@" + PrintPointer(&up) +
-          " 16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-      Print(std::cref(up)));
-}
-
-// Tests printing user-defined unprintable types.
-
-// Unprintable types in the global namespace.
-TEST(PrintUnprintableTypeTest, InGlobalNamespace) {
-  EXPECT_EQ("1-byte object <00>",
-            Print(UnprintableTemplateInGlobal<char>()));
-}
-
-// Unprintable types in a user namespace.
-TEST(PrintUnprintableTypeTest, InUserNamespace) {
-  EXPECT_EQ("16-byte object <EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-            Print(::foo::UnprintableInFoo()));
-}
-
-// Unprintable types are that too big to be printed completely.
-
-struct Big {
-  Big() { memset(array, 0, sizeof(array)); }
-  char array[257];
-};
-
-TEST(PrintUnpritableTypeTest, BigObject) {
-  EXPECT_EQ("257-byte object <00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 ... 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 "
-            "00-00 00-00 00-00 00-00 00-00 00-00 00-00 00-00 00>",
-            Print(Big()));
-}
-
-// Tests printing user-defined streamable types.
-
-// Streamable types in the global namespace.
-TEST(PrintStreamableTypeTest, InGlobalNamespace) {
-  StreamableInGlobal x;
-  EXPECT_EQ("StreamableInGlobal", Print(x));
-  EXPECT_EQ("StreamableInGlobal*", Print(&x));
-}
-
-// Printable template types in a user namespace.
-TEST(PrintStreamableTypeTest, TemplateTypeInUserNamespace) {
-  EXPECT_EQ("StreamableTemplateInFoo: 0",
-            Print(::foo::StreamableTemplateInFoo<int>()));
-}
-
-// Tests printing a user-defined recursive container type that has a <<
-// operator.
-TEST(PrintStreamableTypeTest, PathLikeInUserNamespace) {
-  ::foo::PathLike x;
-  EXPECT_EQ("Streamable-PathLike", Print(x));
-  const ::foo::PathLike cx;
-  EXPECT_EQ("Streamable-PathLike", Print(cx));
-}
-
-// Tests printing user-defined types that have a PrintTo() function.
-TEST(PrintPrintableTypeTest, InUserNamespace) {
-  EXPECT_EQ("PrintableViaPrintTo: 0",
-            Print(::foo::PrintableViaPrintTo()));
-}
-
-// Tests printing a pointer to a user-defined type that has a <<
-// operator for its pointer.
-TEST(PrintPrintableTypeTest, PointerInUserNamespace) {
-  ::foo::PointerPrintable x;
-  EXPECT_EQ("PointerPrintable*", Print(&x));
-}
-
-// Tests printing user-defined class template that have a PrintTo() function.
-TEST(PrintPrintableTypeTest, TemplateInUserNamespace) {
-  EXPECT_EQ("PrintableViaPrintToTemplate: 5",
-            Print(::foo::PrintableViaPrintToTemplate<int>(5)));
-}
-
-// Tests that the universal printer prints both the address and the
-// value of a reference.
-TEST(PrintReferenceTest, PrintsAddressAndValue) {
-  int n = 5;
-  EXPECT_EQ("@" + PrintPointer(&n) + " 5", PrintByRef(n));
-
-  int a[2][3] = {
-    { 0, 1, 2 },
-    { 3, 4, 5 }
-  };
-  EXPECT_EQ("@" + PrintPointer(a) + " { { 0, 1, 2 }, { 3, 4, 5 } }",
-            PrintByRef(a));
-
-  const ::foo::UnprintableInFoo x;
-  EXPECT_EQ("@" + PrintPointer(&x) + " 16-byte object "
-            "<EF-12 00-00 34-AB 00-00 00-00 00-00 00-00 00-00>",
-            PrintByRef(x));
-}
-
-// Tests that the universal printer prints a function pointer passed by
-// reference.
-TEST(PrintReferenceTest, HandlesFunctionPointer) {
-  void (*fp)(int n) = &MyFunction;
-  const std::string fp_pointer_string =
-      PrintPointer(reinterpret_cast<const void*>(&fp));
-  // We cannot directly cast &MyFunction to const void* because the
-  // standard disallows casting between pointers to functions and
-  // pointers to objects, and some compilers (e.g. GCC 3.4) enforce
-  // this limitation.
-  const std::string fp_string = PrintPointer(reinterpret_cast<const void*>(
-      reinterpret_cast<internal::BiggestInt>(fp)));
-  EXPECT_EQ("@" + fp_pointer_string + " " + fp_string,
-            PrintByRef(fp));
-}
-
-// Tests that the universal printer prints a member function pointer
-// passed by reference.
-TEST(PrintReferenceTest, HandlesMemberFunctionPointer) {
-  int (Foo::*p)(char ch) = &Foo::MyMethod;
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p),
-      "@" + PrintPointer(reinterpret_cast<const void*>(&p)) + " " +
-          Print(sizeof(p)) + "-byte object "));
-
-  char (Foo::*p2)(int n) = &Foo::MyVirtualMethod;
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p2),
-      "@" + PrintPointer(reinterpret_cast<const void*>(&p2)) + " " +
-          Print(sizeof(p2)) + "-byte object "));
-}
-
-// Tests that the universal printer prints a member variable pointer
-// passed by reference.
-TEST(PrintReferenceTest, HandlesMemberVariablePointer) {
-  int Foo::*p = &Foo::value;  // NOLINT
-  EXPECT_TRUE(HasPrefix(
-      PrintByRef(p),
-      "@" + PrintPointer(&p) + " " + Print(sizeof(p)) + "-byte object "));
-}
-
-// Tests that FormatForComparisonFailureMessage(), which is used to print
-// an operand in a comparison assertion (e.g. ASSERT_EQ) when the assertion
-// fails, formats the operand in the desired way.
-
-// scalar
-TEST(FormatForComparisonFailureMessageTest, WorksForScalar) {
-  EXPECT_STREQ("123",
-               FormatForComparisonFailureMessage(123, 124).c_str());
-}
-
-// non-char pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForNonCharPointer) {
-  int n = 0;
-  EXPECT_EQ(PrintPointer(&n),
-            FormatForComparisonFailureMessage(&n, &n).c_str());
-}
-
-// non-char array
-TEST(FormatForComparisonFailureMessageTest, FormatsNonCharArrayAsPointer) {
-  // In expression 'array == x', 'array' is compared by pointer.
-  // Therefore we want to print an array operand as a pointer.
-  int n[] = { 1, 2, 3 };
-  EXPECT_EQ(PrintPointer(n),
-            FormatForComparisonFailureMessage(n, n).c_str());
-}
-
-// Tests formatting a char pointer when it's compared with another pointer.
-// In this case we want to print it as a raw pointer, as the comparison is by
-// pointer.
-
-// char pointer vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForCharPointerVsPointer) {
-  // In expression 'p == x', where 'p' and 'x' are (const or not) char
-  // pointers, the operands are compared by pointer.  Therefore we
-  // want to print 'p' as a pointer instead of a C string (we don't
-  // even know if it's supposed to point to a valid C string).
-
-  // const char*
-  const char* s = "hello";
-  EXPECT_EQ(PrintPointer(s),
-            FormatForComparisonFailureMessage(s, s).c_str());
-
-  // char*
-  char ch = 'a';
-  EXPECT_EQ(PrintPointer(&ch),
-            FormatForComparisonFailureMessage(&ch, &ch).c_str());
-}
-
-// wchar_t pointer vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharPointerVsPointer) {
-  // In expression 'p == x', where 'p' and 'x' are (const or not) char
-  // pointers, the operands are compared by pointer.  Therefore we
-  // want to print 'p' as a pointer instead of a wide C string (we don't
-  // even know if it's supposed to point to a valid wide C string).
-
-  // const wchar_t*
-  const wchar_t* s = L"hello";
-  EXPECT_EQ(PrintPointer(s),
-            FormatForComparisonFailureMessage(s, s).c_str());
-
-  // wchar_t*
-  wchar_t ch = L'a';
-  EXPECT_EQ(PrintPointer(&ch),
-            FormatForComparisonFailureMessage(&ch, &ch).c_str());
-}
-
-// Tests formatting a char pointer when it's compared to a string object.
-// In this case we want to print the char pointer as a C string.
-
-// char pointer vs std::string
-TEST(FormatForComparisonFailureMessageTest, WorksForCharPointerVsStdString) {
-  const char* s = "hello \"world";
-  EXPECT_STREQ("\"hello \\\"world\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(s, ::std::string()).c_str());
-
-  // char*
-  char str[] = "hi\1";
-  char* p = str;
-  EXPECT_STREQ("\"hi\\x1\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(p, ::std::string()).c_str());
-}
-
-#if GTEST_HAS_STD_WSTRING
-// wchar_t pointer vs std::wstring
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharPointerVsStdWString) {
-  const wchar_t* s = L"hi \"world";
-  EXPECT_STREQ("L\"hi \\\"world\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(s, ::std::wstring()).c_str());
-
-  // wchar_t*
-  wchar_t str[] = L"hi\1";
-  wchar_t* p = str;
-  EXPECT_STREQ("L\"hi\\x1\"",  // The string content should be escaped.
-               FormatForComparisonFailureMessage(p, ::std::wstring()).c_str());
-}
-#endif
-
-// Tests formatting a char array when it's compared with a pointer or array.
-// In this case we want to print the array as a row pointer, as the comparison
-// is by pointer.
-
-// char array vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsPointer) {
-  char str[] = "hi \"world\"";
-  char* p = nullptr;
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, p).c_str());
-}
-
-// char array vs char array
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsCharArray) {
-  const char str[] = "hi \"world\"";
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, str).c_str());
-}
-
-// wchar_t array vs pointer
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsPointer) {
-  wchar_t str[] = L"hi \"world\"";
-  wchar_t* p = nullptr;
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, p).c_str());
-}
-
-// wchar_t array vs wchar_t array
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsWCharArray) {
-  const wchar_t str[] = L"hi \"world\"";
-  EXPECT_EQ(PrintPointer(str),
-            FormatForComparisonFailureMessage(str, str).c_str());
-}
-
-// Tests formatting a char array when it's compared with a string object.
-// In this case we want to print the array as a C string.
-
-// char array vs std::string
-TEST(FormatForComparisonFailureMessageTest, WorksForCharArrayVsStdString) {
-  const char str[] = "hi \"world\"";
-  EXPECT_STREQ("\"hi \\\"world\\\"\"",  // The content should be escaped.
-               FormatForComparisonFailureMessage(str, ::std::string()).c_str());
-}
-
-#if GTEST_HAS_STD_WSTRING
-// wchar_t array vs std::wstring
-TEST(FormatForComparisonFailureMessageTest, WorksForWCharArrayVsStdWString) {
-  const wchar_t str[] = L"hi \"w\0rld\"";
-  EXPECT_STREQ(
-      "L\"hi \\\"w\"",  // The content should be escaped.
-                        // Embedded NUL terminates the string.
-      FormatForComparisonFailureMessage(str, ::std::wstring()).c_str());
-}
-#endif
-
-// Useful for testing PrintToString().  We cannot use EXPECT_EQ()
-// there as its implementation uses PrintToString().  The caller must
-// ensure that 'value' has no side effect.
-#define EXPECT_PRINT_TO_STRING_(value, expected_string)         \
-  EXPECT_TRUE(PrintToString(value) == (expected_string))        \
-      << " where " #value " prints as " << (PrintToString(value))
-
-TEST(PrintToStringTest, WorksForScalar) {
-  EXPECT_PRINT_TO_STRING_(123, "123");
-}
-
-TEST(PrintToStringTest, WorksForPointerToConstChar) {
-  const char* p = "hello";
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\"");
-}
-
-TEST(PrintToStringTest, WorksForPointerToNonConstChar) {
-  char s[] = "hello";
-  char* p = s;
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\"");
-}
-
-TEST(PrintToStringTest, EscapesForPointerToConstChar) {
-  const char* p = "hello\n";
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\\n\"");
-}
-
-TEST(PrintToStringTest, EscapesForPointerToNonConstChar) {
-  char s[] = "hello\1";
-  char* p = s;
-  EXPECT_PRINT_TO_STRING_(p, "\"hello\\x1\"");
-}
-
-TEST(PrintToStringTest, WorksForArray) {
-  int n[3] = { 1, 2, 3 };
-  EXPECT_PRINT_TO_STRING_(n, "{ 1, 2, 3 }");
-}
-
-TEST(PrintToStringTest, WorksForCharArray) {
-  char s[] = "hello";
-  EXPECT_PRINT_TO_STRING_(s, "\"hello\"");
-}
-
-TEST(PrintToStringTest, WorksForCharArrayWithEmbeddedNul) {
-  const char str_with_nul[] = "hello\0 world";
-  EXPECT_PRINT_TO_STRING_(str_with_nul, "\"hello\\0 world\"");
-
-  char mutable_str_with_nul[] = "hello\0 world";
-  EXPECT_PRINT_TO_STRING_(mutable_str_with_nul, "\"hello\\0 world\"");
-}
-
-  TEST(PrintToStringTest, ContainsNonLatin) {
-  // Sanity test with valid UTF-8. Prints both in hex and as text.
-  std::string non_ascii_str = ::std::string("오전 4:30");
-  EXPECT_PRINT_TO_STRING_(non_ascii_str,
-                          "\"\\xEC\\x98\\xA4\\xEC\\xA0\\x84 4:30\"\n"
-                          "    As Text: \"오전 4:30\"");
-  non_ascii_str = ::std::string("From ä — ẑ");
-  EXPECT_PRINT_TO_STRING_(non_ascii_str,
-                          "\"From \\xC3\\xA4 \\xE2\\x80\\x94 \\xE1\\xBA\\x91\""
-                          "\n    As Text: \"From ä — ẑ\"");
-}
-
-TEST(IsValidUTF8Test, IllFormedUTF8) {
-  // The following test strings are ill-formed UTF-8 and are printed
-  // as hex only (or ASCII, in case of ASCII bytes) because IsValidUTF8() is
-  // expected to fail, thus output does not contain "As Text:".
-
-  static const char *const kTestdata[][2] = {
-    // 2-byte lead byte followed by a single-byte character.
-    {"\xC3\x74", "\"\\xC3t\""},
-    // Valid 2-byte character followed by an orphan trail byte.
-    {"\xC3\x84\xA4", "\"\\xC3\\x84\\xA4\""},
-    // Lead byte without trail byte.
-    {"abc\xC3", "\"abc\\xC3\""},
-    // 3-byte lead byte, single-byte character, orphan trail byte.
-    {"x\xE2\x70\x94", "\"x\\xE2p\\x94\""},
-    // Truncated 3-byte character.
-    {"\xE2\x80", "\"\\xE2\\x80\""},
-    // Truncated 3-byte character followed by valid 2-byte char.
-    {"\xE2\x80\xC3\x84", "\"\\xE2\\x80\\xC3\\x84\""},
-    // Truncated 3-byte character followed by a single-byte character.
-    {"\xE2\x80\x7A", "\"\\xE2\\x80z\""},
-    // 3-byte lead byte followed by valid 3-byte character.
-    {"\xE2\xE2\x80\x94", "\"\\xE2\\xE2\\x80\\x94\""},
-    // 4-byte lead byte followed by valid 3-byte character.
-    {"\xF0\xE2\x80\x94", "\"\\xF0\\xE2\\x80\\x94\""},
-    // Truncated 4-byte character.
-    {"\xF0\xE2\x80", "\"\\xF0\\xE2\\x80\""},
-     // Invalid UTF-8 byte sequences embedded in other chars.
-    {"abc\xE2\x80\x94\xC3\x74xyc", "\"abc\\xE2\\x80\\x94\\xC3txyc\""},
-    {"abc\xC3\x84\xE2\x80\xC3\x84xyz",
-     "\"abc\\xC3\\x84\\xE2\\x80\\xC3\\x84xyz\""},
-    // Non-shortest UTF-8 byte sequences are also ill-formed.
-    // The classics: xC0, xC1 lead byte.
-    {"\xC0\x80", "\"\\xC0\\x80\""},
-    {"\xC1\x81", "\"\\xC1\\x81\""},
-    // Non-shortest sequences.
-    {"\xE0\x80\x80", "\"\\xE0\\x80\\x80\""},
-    {"\xf0\x80\x80\x80", "\"\\xF0\\x80\\x80\\x80\""},
-    // Last valid code point before surrogate range, should be printed as text,
-    // too.
-    {"\xED\x9F\xBF", "\"\\xED\\x9F\\xBF\"\n    As Text: \"퟿\""},
-    // Start of surrogate lead. Surrogates are not printed as text.
-    {"\xED\xA0\x80", "\"\\xED\\xA0\\x80\""},
-    // Last non-private surrogate lead.
-    {"\xED\xAD\xBF", "\"\\xED\\xAD\\xBF\""},
-    // First private-use surrogate lead.
-    {"\xED\xAE\x80", "\"\\xED\\xAE\\x80\""},
-    // Last private-use surrogate lead.
-    {"\xED\xAF\xBF", "\"\\xED\\xAF\\xBF\""},
-    // Mid-point of surrogate trail.
-    {"\xED\xB3\xBF", "\"\\xED\\xB3\\xBF\""},
-    // First valid code point after surrogate range, should be printed as text,
-    // too.
-    {"\xEE\x80\x80", "\"\\xEE\\x80\\x80\"\n    As Text: \"\""}
-  };
-
-  for (int i = 0; i < int(sizeof(kTestdata)/sizeof(kTestdata[0])); ++i) {
-    EXPECT_PRINT_TO_STRING_(kTestdata[i][0], kTestdata[i][1]);
-  }
-}
-
-#undef EXPECT_PRINT_TO_STRING_
-
-TEST(UniversalTersePrintTest, WorksForNonReference) {
-  ::std::stringstream ss;
-  UniversalTersePrint(123, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalTersePrintTest, WorksForReference) {
-  const int& n = 123;
-  ::std::stringstream ss;
-  UniversalTersePrint(n, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalTersePrintTest, WorksForCString) {
-  const char* s1 = "abc";
-  ::std::stringstream ss1;
-  UniversalTersePrint(s1, &ss1);
-  EXPECT_EQ("\"abc\"", ss1.str());
-
-  char* s2 = const_cast<char*>(s1);
-  ::std::stringstream ss2;
-  UniversalTersePrint(s2, &ss2);
-  EXPECT_EQ("\"abc\"", ss2.str());
-
-  const char* s3 = nullptr;
-  ::std::stringstream ss3;
-  UniversalTersePrint(s3, &ss3);
-  EXPECT_EQ("NULL", ss3.str());
-}
-
-TEST(UniversalPrintTest, WorksForNonReference) {
-  ::std::stringstream ss;
-  UniversalPrint(123, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalPrintTest, WorksForReference) {
-  const int& n = 123;
-  ::std::stringstream ss;
-  UniversalPrint(n, &ss);
-  EXPECT_EQ("123", ss.str());
-}
-
-TEST(UniversalPrintTest, WorksForCString) {
-  const char* s1 = "abc";
-  ::std::stringstream ss1;
-  UniversalPrint(s1, &ss1);
-  EXPECT_EQ(PrintPointer(s1) + " pointing to \"abc\"", std::string(ss1.str()));
-
-  char* s2 = const_cast<char*>(s1);
-  ::std::stringstream ss2;
-  UniversalPrint(s2, &ss2);
-  EXPECT_EQ(PrintPointer(s2) + " pointing to \"abc\"", std::string(ss2.str()));
-
-  const char* s3 = nullptr;
-  ::std::stringstream ss3;
-  UniversalPrint(s3, &ss3);
-  EXPECT_EQ("NULL", ss3.str());
-}
-
-TEST(UniversalPrintTest, WorksForCharArray) {
-  const char str[] = "\"Line\0 1\"\nLine 2";
-  ::std::stringstream ss1;
-  UniversalPrint(str, &ss1);
-  EXPECT_EQ("\"\\\"Line\\0 1\\\"\\nLine 2\"", ss1.str());
-
-  const char mutable_str[] = "\"Line\0 1\"\nLine 2";
-  ::std::stringstream ss2;
-  UniversalPrint(mutable_str, &ss2);
-  EXPECT_EQ("\"\\\"Line\\0 1\\\"\\nLine 2\"", ss2.str());
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsEmptyTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(::std::make_tuple());
-  EXPECT_EQ(0u, result.size());
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsOneTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::make_tuple(1));
-  ASSERT_EQ(1u, result.size());
-  EXPECT_EQ("1", result[0]);
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsTwoTuple) {
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::make_tuple(1, 'a'));
-  ASSERT_EQ(2u, result.size());
-  EXPECT_EQ("1", result[0]);
-  EXPECT_EQ("'a' (97, 0x61)", result[1]);
-}
-
-TEST(UniversalTersePrintTupleFieldsToStringsTestWithStd, PrintsTersely) {
-  const int n = 1;
-  Strings result = UniversalTersePrintTupleFieldsToStrings(
-      ::std::tuple<const int&, const char*>(n, "a"));
-  ASSERT_EQ(2u, result.size());
-  EXPECT_EQ("1", result[0]);
-  EXPECT_EQ("\"a\"", result[1]);
-}
-
-#if GTEST_HAS_ABSL
-
-TEST(PrintOptionalTest, Basic) {
-  absl::optional<int> value;
-  EXPECT_EQ("(nullopt)", PrintToString(value));
-  value = {7};
-  EXPECT_EQ("(7)", PrintToString(value));
-  EXPECT_EQ("(1.1)", PrintToString(absl::optional<double>{1.1}));
-  EXPECT_EQ("(\"A\")", PrintToString(absl::optional<std::string>{"A"}));
-}
-
-struct NonPrintable {
-  unsigned char contents = 17;
-};
-
-TEST(PrintOneofTest, Basic) {
-  using Type = absl::variant<int, StreamableInGlobal, NonPrintable>;
-  EXPECT_EQ("('int' with value 7)", PrintToString(Type(7)));
-  EXPECT_EQ("('StreamableInGlobal' with value StreamableInGlobal)",
-            PrintToString(Type(StreamableInGlobal{})));
-  EXPECT_EQ(
-      "('testing::gtest_printers_test::NonPrintable' with value 1-byte object "
-      "<11>)",
-      PrintToString(Type(NonPrintable{})));
-}
-#endif  // GTEST_HAS_ABSL
-namespace {
-class string_ref;
-
-/**
- * This is a synthetic pointer to a fixed size string.
- */
-class string_ptr {
- public:
-  string_ptr(const char* data, size_t size) : data_(data), size_(size) {}
-
-  string_ptr& operator++() noexcept {
-    data_ += size_;
-    return *this;
-  }
-
-  string_ref operator*() const noexcept;
-
- private:
-  const char* data_;
-  size_t size_;
-};
-
-/**
- * This is a synthetic reference of a fixed size string.
- */
-class string_ref {
- public:
-  string_ref(const char* data, size_t size) : data_(data), size_(size) {}
-
-  string_ptr operator&() const noexcept { return {data_, size_}; }  // NOLINT
-
-  bool operator==(const char* s) const noexcept {
-    if (size_ > 0 && data_[size_ - 1] != 0) {
-      return std::string(data_, size_) == std::string(s);
-    } else {
-      return std::string(data_) == std::string(s);
-    }
-  }
-
- private:
-  const char* data_;
-  size_t size_;
-};
-
-string_ref string_ptr::operator*() const noexcept { return {data_, size_}; }
-
-TEST(string_ref, compare) {
-  const char* s = "alex\0davidjohn\0";
-  string_ptr ptr(s, 5);
-  EXPECT_EQ(*ptr, "alex");
-  EXPECT_TRUE(*ptr == "alex");
-  ++ptr;
-  EXPECT_EQ(*ptr, "david");
-  EXPECT_TRUE(*ptr == "david");
-  ++ptr;
-  EXPECT_EQ(*ptr, "john");
-}
-
-}  // namespace
-
-}  // namespace gtest_printers_test
-}  // namespace testing
diff --git a/3rdparty/gtest/test/googletest-shuffle-test.py b/3rdparty/gtest/test/googletest-shuffle-test.py
deleted file mode 100644
index 573cc5ec..00000000
--- a/3rdparty/gtest/test/googletest-shuffle-test.py
+++ /dev/null
@@ -1,323 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009 Google Inc. All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that test shuffling works."""
-
-import os
-import gtest_test_utils
-
-# Command to run the googletest-shuffle-test_ program.
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-shuffle-test_')
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-
-TEST_FILTER = 'A*.A:A*.B:C*'
-
-ALL_TESTS = []
-ACTIVE_TESTS = []
-FILTERED_TESTS = []
-SHARDED_TESTS = []
-
-SHUFFLED_ALL_TESTS = []
-SHUFFLED_ACTIVE_TESTS = []
-SHUFFLED_FILTERED_TESTS = []
-SHUFFLED_SHARDED_TESTS = []
-
-
-def AlsoRunDisabledTestsFlag():
-  return '--gtest_also_run_disabled_tests'
-
-
-def FilterFlag(test_filter):
-  return '--gtest_filter=%s' % (test_filter,)
-
-
-def RepeatFlag(n):
-  return '--gtest_repeat=%s' % (n,)
-
-
-def ShuffleFlag():
-  return '--gtest_shuffle'
-
-
-def RandomSeedFlag(n):
-  return '--gtest_random_seed=%s' % (n,)
-
-
-def RunAndReturnOutput(extra_env, args):
-  """Runs the test program and returns its output."""
-
-  environ_copy = os.environ.copy()
-  environ_copy.update(extra_env)
-
-  return gtest_test_utils.Subprocess([COMMAND] + args, env=environ_copy).output
-
-
-def GetTestsForAllIterations(extra_env, args):
-  """Runs the test program and returns a list of test lists.
-
-  Args:
-    extra_env: a map from environment variables to their values
-    args: command line flags to pass to googletest-shuffle-test_
-
-  Returns:
-    A list where the i-th element is the list of tests run in the i-th
-    test iteration.
-  """
-
-  test_iterations = []
-  for line in RunAndReturnOutput(extra_env, args).split('\n'):
-    if line.startswith('----'):
-      tests = []
-      test_iterations.append(tests)
-    elif line.strip():
-      tests.append(line.strip())  # 'TestCaseName.TestName'
-
-  return test_iterations
-
-
-def GetTestCases(tests):
-  """Returns a list of test cases in the given full test names.
-
-  Args:
-    tests: a list of full test names
-
-  Returns:
-    A list of test cases from 'tests', in their original order.
-    Consecutive duplicates are removed.
-  """
-
-  test_cases = []
-  for test in tests:
-    test_case = test.split('.')[0]
-    if not test_case in test_cases:
-      test_cases.append(test_case)
-
-  return test_cases
-
-
-def CalculateTestLists():
-  """Calculates the list of tests run under different flags."""
-
-  if not ALL_TESTS:
-    ALL_TESTS.extend(
-        GetTestsForAllIterations({}, [AlsoRunDisabledTestsFlag()])[0])
-
-  if not ACTIVE_TESTS:
-    ACTIVE_TESTS.extend(GetTestsForAllIterations({}, [])[0])
-
-  if not FILTERED_TESTS:
-    FILTERED_TESTS.extend(
-        GetTestsForAllIterations({}, [FilterFlag(TEST_FILTER)])[0])
-
-  if not SHARDED_TESTS:
-    SHARDED_TESTS.extend(
-        GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                  SHARD_INDEX_ENV_VAR: '1'},
-                                 [])[0])
-
-  if not SHUFFLED_ALL_TESTS:
-    SHUFFLED_ALL_TESTS.extend(GetTestsForAllIterations(
-        {}, [AlsoRunDisabledTestsFlag(), ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-  if not SHUFFLED_ACTIVE_TESTS:
-    SHUFFLED_ACTIVE_TESTS.extend(GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-  if not SHUFFLED_FILTERED_TESTS:
-    SHUFFLED_FILTERED_TESTS.extend(GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1), FilterFlag(TEST_FILTER)])[0])
-
-  if not SHUFFLED_SHARDED_TESTS:
-    SHUFFLED_SHARDED_TESTS.extend(
-        GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                  SHARD_INDEX_ENV_VAR: '1'},
-                                 [ShuffleFlag(), RandomSeedFlag(1)])[0])
-
-
-class GTestShuffleUnitTest(gtest_test_utils.TestCase):
-  """Tests test shuffling."""
-
-  def setUp(self):
-    CalculateTestLists()
-
-  def testShufflePreservesNumberOfTests(self):
-    self.assertEqual(len(ALL_TESTS), len(SHUFFLED_ALL_TESTS))
-    self.assertEqual(len(ACTIVE_TESTS), len(SHUFFLED_ACTIVE_TESTS))
-    self.assertEqual(len(FILTERED_TESTS), len(SHUFFLED_FILTERED_TESTS))
-    self.assertEqual(len(SHARDED_TESTS), len(SHUFFLED_SHARDED_TESTS))
-
-  def testShuffleChangesTestOrder(self):
-    self.assert_(SHUFFLED_ALL_TESTS != ALL_TESTS, SHUFFLED_ALL_TESTS)
-    self.assert_(SHUFFLED_ACTIVE_TESTS != ACTIVE_TESTS, SHUFFLED_ACTIVE_TESTS)
-    self.assert_(SHUFFLED_FILTERED_TESTS != FILTERED_TESTS,
-                 SHUFFLED_FILTERED_TESTS)
-    self.assert_(SHUFFLED_SHARDED_TESTS != SHARDED_TESTS,
-                 SHUFFLED_SHARDED_TESTS)
-
-  def testShuffleChangesTestCaseOrder(self):
-    self.assert_(GetTestCases(SHUFFLED_ALL_TESTS) != GetTestCases(ALL_TESTS),
-                 GetTestCases(SHUFFLED_ALL_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_ACTIVE_TESTS) != GetTestCases(ACTIVE_TESTS),
-        GetTestCases(SHUFFLED_ACTIVE_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_FILTERED_TESTS) != GetTestCases(FILTERED_TESTS),
-        GetTestCases(SHUFFLED_FILTERED_TESTS))
-    self.assert_(
-        GetTestCases(SHUFFLED_SHARDED_TESTS) != GetTestCases(SHARDED_TESTS),
-        GetTestCases(SHUFFLED_SHARDED_TESTS))
-
-  def testShuffleDoesNotRepeatTest(self):
-    for test in SHUFFLED_ALL_TESTS:
-      self.assertEqual(1, SHUFFLED_ALL_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_ACTIVE_TESTS:
-      self.assertEqual(1, SHUFFLED_ACTIVE_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_FILTERED_TESTS:
-      self.assertEqual(1, SHUFFLED_FILTERED_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-    for test in SHUFFLED_SHARDED_TESTS:
-      self.assertEqual(1, SHUFFLED_SHARDED_TESTS.count(test),
-                       '%s appears more than once' % (test,))
-
-  def testShuffleDoesNotCreateNewTest(self):
-    for test in SHUFFLED_ALL_TESTS:
-      self.assert_(test in ALL_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_ACTIVE_TESTS:
-      self.assert_(test in ACTIVE_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_FILTERED_TESTS:
-      self.assert_(test in FILTERED_TESTS, '%s is an invalid test' % (test,))
-    for test in SHUFFLED_SHARDED_TESTS:
-      self.assert_(test in SHARDED_TESTS, '%s is an invalid test' % (test,))
-
-  def testShuffleIncludesAllTests(self):
-    for test in ALL_TESTS:
-      self.assert_(test in SHUFFLED_ALL_TESTS, '%s is missing' % (test,))
-    for test in ACTIVE_TESTS:
-      self.assert_(test in SHUFFLED_ACTIVE_TESTS, '%s is missing' % (test,))
-    for test in FILTERED_TESTS:
-      self.assert_(test in SHUFFLED_FILTERED_TESTS, '%s is missing' % (test,))
-    for test in SHARDED_TESTS:
-      self.assert_(test in SHUFFLED_SHARDED_TESTS, '%s is missing' % (test,))
-
-  def testShuffleLeavesDeathTestsAtFront(self):
-    non_death_test_found = False
-    for test in SHUFFLED_ACTIVE_TESTS:
-      if 'DeathTest.' in test:
-        self.assert_(not non_death_test_found,
-                     '%s appears after a non-death test' % (test,))
-      else:
-        non_death_test_found = True
-
-  def _VerifyTestCasesDoNotInterleave(self, tests):
-    test_cases = []
-    for test in tests:
-      [test_case, _] = test.split('.')
-      if test_cases and test_cases[-1] != test_case:
-        test_cases.append(test_case)
-        self.assertEqual(1, test_cases.count(test_case),
-                         'Test case %s is not grouped together in %s' %
-                         (test_case, tests))
-
-  def testShuffleDoesNotInterleaveTestCases(self):
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_ALL_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_ACTIVE_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_FILTERED_TESTS)
-    self._VerifyTestCasesDoNotInterleave(SHUFFLED_SHARDED_TESTS)
-
-  def testShuffleRestoresOrderAfterEachIteration(self):
-    # Get the test lists in all 3 iterations, using random seed 1, 2,
-    # and 3 respectively.  Google Test picks a different seed in each
-    # iteration, and this test depends on the current implementation
-    # picking successive numbers.  This dependency is not ideal, but
-    # makes the test much easier to write.
-    [tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
-        GetTestsForAllIterations(
-            {}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
-
-    # Make sure running the tests with random seed 1 gets the same
-    # order as in iteration 1 above.
-    [tests_with_seed1] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(1)])
-    self.assertEqual(tests_in_iteration1, tests_with_seed1)
-
-    # Make sure running the tests with random seed 2 gets the same
-    # order as in iteration 2 above.  Success means that Google Test
-    # correctly restores the test order before re-shuffling at the
-    # beginning of iteration 2.
-    [tests_with_seed2] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(2)])
-    self.assertEqual(tests_in_iteration2, tests_with_seed2)
-
-    # Make sure running the tests with random seed 3 gets the same
-    # order as in iteration 3 above.  Success means that Google Test
-    # correctly restores the test order before re-shuffling at the
-    # beginning of iteration 3.
-    [tests_with_seed3] = GetTestsForAllIterations(
-        {}, [ShuffleFlag(), RandomSeedFlag(3)])
-    self.assertEqual(tests_in_iteration3, tests_with_seed3)
-
-  def testShuffleGeneratesNewOrderInEachIteration(self):
-    [tests_in_iteration1, tests_in_iteration2, tests_in_iteration3] = (
-        GetTestsForAllIterations(
-            {}, [ShuffleFlag(), RandomSeedFlag(1), RepeatFlag(3)]))
-
-    self.assert_(tests_in_iteration1 != tests_in_iteration2,
-                 tests_in_iteration1)
-    self.assert_(tests_in_iteration1 != tests_in_iteration3,
-                 tests_in_iteration1)
-    self.assert_(tests_in_iteration2 != tests_in_iteration3,
-                 tests_in_iteration2)
-
-  def testShuffleShardedTestsPreservesPartition(self):
-    # If we run M tests on N shards, the same M tests should be run in
-    # total, regardless of the random seeds used by the shards.
-    [tests1] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '0'},
-                                        [ShuffleFlag(), RandomSeedFlag(1)])
-    [tests2] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '1'},
-                                        [ShuffleFlag(), RandomSeedFlag(20)])
-    [tests3] = GetTestsForAllIterations({TOTAL_SHARDS_ENV_VAR: '3',
-                                         SHARD_INDEX_ENV_VAR: '2'},
-                                        [ShuffleFlag(), RandomSeedFlag(25)])
-    sorted_sharded_tests = tests1 + tests2 + tests3
-    sorted_sharded_tests.sort()
-    sorted_active_tests = []
-    sorted_active_tests.extend(ACTIVE_TESTS)
-    sorted_active_tests.sort()
-    self.assertEqual(sorted_active_tests, sorted_sharded_tests)
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-shuffle-test_.cc b/3rdparty/gtest/test/googletest-shuffle-test_.cc
deleted file mode 100644
index c1fc1066..00000000
--- a/3rdparty/gtest/test/googletest-shuffle-test_.cc
+++ /dev/null
@@ -1,101 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Verifies that test shuffling works.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::EmptyTestEventListener;
-using ::testing::InitGoogleTest;
-using ::testing::Message;
-using ::testing::Test;
-using ::testing::TestEventListeners;
-using ::testing::TestInfo;
-using ::testing::UnitTest;
-
-// The test methods are empty, as the sole purpose of this program is
-// to print the test names before/after shuffling.
-
-class A : public Test {};
-TEST_F(A, A) {}
-TEST_F(A, B) {}
-
-TEST(ADeathTest, A) {}
-TEST(ADeathTest, B) {}
-TEST(ADeathTest, C) {}
-
-TEST(B, A) {}
-TEST(B, B) {}
-TEST(B, C) {}
-TEST(B, DISABLED_D) {}
-TEST(B, DISABLED_E) {}
-
-TEST(BDeathTest, A) {}
-TEST(BDeathTest, B) {}
-
-TEST(C, A) {}
-TEST(C, B) {}
-TEST(C, C) {}
-TEST(C, DISABLED_D) {}
-
-TEST(CDeathTest, A) {}
-
-TEST(DISABLED_D, A) {}
-TEST(DISABLED_D, DISABLED_B) {}
-
-// This printer prints the full test names only, starting each test
-// iteration with a "----" marker.
-class TestNamePrinter : public EmptyTestEventListener {
- public:
-  void OnTestIterationStart(const UnitTest& /* unit_test */,
-                            int /* iteration */) override {
-    printf("----\n");
-  }
-
-  void OnTestStart(const TestInfo& test_info) override {
-    printf("%s.%s\n", test_info.test_case_name(), test_info.name());
-  }
-};
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  // Replaces the default printer with TestNamePrinter, which prints
-  // the test name only.
-  TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-  delete listeners.Release(listeners.default_result_printer());
-  listeners.Append(new TestNamePrinter);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/googletest-test-part-test.cc b/3rdparty/gtest/test/googletest-test-part-test.cc
deleted file mode 100644
index 44cf7ca0..00000000
--- a/3rdparty/gtest/test/googletest-test-part-test.cc
+++ /dev/null
@@ -1,230 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-#include "gtest/gtest-test-part.h"
-
-#include "gtest/gtest.h"
-
-using testing::Message;
-using testing::Test;
-using testing::TestPartResult;
-using testing::TestPartResultArray;
-
-namespace {
-
-// Tests the TestPartResult class.
-
-// The test fixture for testing TestPartResult.
-class TestPartResultTest : public Test {
- protected:
-  TestPartResultTest()
-      : r1_(TestPartResult::kSuccess, "foo/bar.cc", 10, "Success!"),
-        r2_(TestPartResult::kNonFatalFailure, "foo/bar.cc", -1, "Failure!"),
-        r3_(TestPartResult::kFatalFailure, nullptr, -1, "Failure!"),
-        r4_(TestPartResult::kSkip, "foo/bar.cc", 2, "Skipped!") {}
-
-  TestPartResult r1_, r2_, r3_, r4_;
-};
-
-
-TEST_F(TestPartResultTest, ConstructorWorks) {
-  Message message;
-  message << "something is terribly wrong";
-  message << static_cast<const char*>(testing::internal::kStackTraceMarker);
-  message << "some unimportant stack trace";
-
-  const TestPartResult result(TestPartResult::kNonFatalFailure,
-                              "some_file.cc",
-                              42,
-                              message.GetString().c_str());
-
-  EXPECT_EQ(TestPartResult::kNonFatalFailure, result.type());
-  EXPECT_STREQ("some_file.cc", result.file_name());
-  EXPECT_EQ(42, result.line_number());
-  EXPECT_STREQ(message.GetString().c_str(), result.message());
-  EXPECT_STREQ("something is terribly wrong", result.summary());
-}
-
-TEST_F(TestPartResultTest, ResultAccessorsWork) {
-  const TestPartResult success(TestPartResult::kSuccess,
-                               "file.cc",
-                               42,
-                               "message");
-  EXPECT_TRUE(success.passed());
-  EXPECT_FALSE(success.failed());
-  EXPECT_FALSE(success.nonfatally_failed());
-  EXPECT_FALSE(success.fatally_failed());
-  EXPECT_FALSE(success.skipped());
-
-  const TestPartResult nonfatal_failure(TestPartResult::kNonFatalFailure,
-                                        "file.cc",
-                                        42,
-                                        "message");
-  EXPECT_FALSE(nonfatal_failure.passed());
-  EXPECT_TRUE(nonfatal_failure.failed());
-  EXPECT_TRUE(nonfatal_failure.nonfatally_failed());
-  EXPECT_FALSE(nonfatal_failure.fatally_failed());
-  EXPECT_FALSE(nonfatal_failure.skipped());
-
-  const TestPartResult fatal_failure(TestPartResult::kFatalFailure,
-                                     "file.cc",
-                                     42,
-                                     "message");
-  EXPECT_FALSE(fatal_failure.passed());
-  EXPECT_TRUE(fatal_failure.failed());
-  EXPECT_FALSE(fatal_failure.nonfatally_failed());
-  EXPECT_TRUE(fatal_failure.fatally_failed());
-  EXPECT_FALSE(fatal_failure.skipped());
-
-  const TestPartResult skip(TestPartResult::kSkip, "file.cc", 42, "message");
-  EXPECT_FALSE(skip.passed());
-  EXPECT_FALSE(skip.failed());
-  EXPECT_FALSE(skip.nonfatally_failed());
-  EXPECT_FALSE(skip.fatally_failed());
-  EXPECT_TRUE(skip.skipped());
-}
-
-// Tests TestPartResult::type().
-TEST_F(TestPartResultTest, type) {
-  EXPECT_EQ(TestPartResult::kSuccess, r1_.type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure, r2_.type());
-  EXPECT_EQ(TestPartResult::kFatalFailure, r3_.type());
-  EXPECT_EQ(TestPartResult::kSkip, r4_.type());
-}
-
-// Tests TestPartResult::file_name().
-TEST_F(TestPartResultTest, file_name) {
-  EXPECT_STREQ("foo/bar.cc", r1_.file_name());
-  EXPECT_STREQ(nullptr, r3_.file_name());
-  EXPECT_STREQ("foo/bar.cc", r4_.file_name());
-}
-
-// Tests TestPartResult::line_number().
-TEST_F(TestPartResultTest, line_number) {
-  EXPECT_EQ(10, r1_.line_number());
-  EXPECT_EQ(-1, r2_.line_number());
-  EXPECT_EQ(2, r4_.line_number());
-}
-
-// Tests TestPartResult::message().
-TEST_F(TestPartResultTest, message) {
-  EXPECT_STREQ("Success!", r1_.message());
-  EXPECT_STREQ("Skipped!", r4_.message());
-}
-
-// Tests TestPartResult::passed().
-TEST_F(TestPartResultTest, Passed) {
-  EXPECT_TRUE(r1_.passed());
-  EXPECT_FALSE(r2_.passed());
-  EXPECT_FALSE(r3_.passed());
-  EXPECT_FALSE(r4_.passed());
-}
-
-// Tests TestPartResult::failed().
-TEST_F(TestPartResultTest, Failed) {
-  EXPECT_FALSE(r1_.failed());
-  EXPECT_TRUE(r2_.failed());
-  EXPECT_TRUE(r3_.failed());
-  EXPECT_FALSE(r4_.failed());
-}
-
-// Tests TestPartResult::failed().
-TEST_F(TestPartResultTest, Skipped) {
-  EXPECT_FALSE(r1_.skipped());
-  EXPECT_FALSE(r2_.skipped());
-  EXPECT_FALSE(r3_.skipped());
-  EXPECT_TRUE(r4_.skipped());
-}
-
-// Tests TestPartResult::fatally_failed().
-TEST_F(TestPartResultTest, FatallyFailed) {
-  EXPECT_FALSE(r1_.fatally_failed());
-  EXPECT_FALSE(r2_.fatally_failed());
-  EXPECT_TRUE(r3_.fatally_failed());
-  EXPECT_FALSE(r4_.fatally_failed());
-}
-
-// Tests TestPartResult::nonfatally_failed().
-TEST_F(TestPartResultTest, NonfatallyFailed) {
-  EXPECT_FALSE(r1_.nonfatally_failed());
-  EXPECT_TRUE(r2_.nonfatally_failed());
-  EXPECT_FALSE(r3_.nonfatally_failed());
-  EXPECT_FALSE(r4_.nonfatally_failed());
-}
-
-// Tests the TestPartResultArray class.
-
-class TestPartResultArrayTest : public Test {
- protected:
-  TestPartResultArrayTest()
-      : r1_(TestPartResult::kNonFatalFailure, "foo/bar.cc", -1, "Failure 1"),
-        r2_(TestPartResult::kFatalFailure, "foo/bar.cc", -1, "Failure 2") {}
-
-  const TestPartResult r1_, r2_;
-};
-
-// Tests that TestPartResultArray initially has size 0.
-TEST_F(TestPartResultArrayTest, InitialSizeIsZero) {
-  TestPartResultArray results;
-  EXPECT_EQ(0, results.size());
-}
-
-// Tests that TestPartResultArray contains the given TestPartResult
-// after one Append() operation.
-TEST_F(TestPartResultArrayTest, ContainsGivenResultAfterAppend) {
-  TestPartResultArray results;
-  results.Append(r1_);
-  EXPECT_EQ(1, results.size());
-  EXPECT_STREQ("Failure 1", results.GetTestPartResult(0).message());
-}
-
-// Tests that TestPartResultArray contains the given TestPartResults
-// after two Append() operations.
-TEST_F(TestPartResultArrayTest, ContainsGivenResultsAfterTwoAppends) {
-  TestPartResultArray results;
-  results.Append(r1_);
-  results.Append(r2_);
-  EXPECT_EQ(2, results.size());
-  EXPECT_STREQ("Failure 1", results.GetTestPartResult(0).message());
-  EXPECT_STREQ("Failure 2", results.GetTestPartResult(1).message());
-}
-
-typedef TestPartResultArrayTest TestPartResultArrayDeathTest;
-
-// Tests that the program dies when GetTestPartResult() is called with
-// an invalid index.
-TEST_F(TestPartResultArrayDeathTest, DiesWhenIndexIsOutOfBound) {
-  TestPartResultArray results;
-  results.Append(r1_);
-
-  EXPECT_DEATH_IF_SUPPORTED(results.GetTestPartResult(-1), "");
-  EXPECT_DEATH_IF_SUPPORTED(results.GetTestPartResult(1), "");
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/test/googletest-test2_test.cc b/3rdparty/gtest/test/googletest-test2_test.cc
deleted file mode 100644
index 2e425dae..00000000
--- a/3rdparty/gtest/test/googletest-test2_test.cc
+++ /dev/null
@@ -1,61 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself.  This verifies that the basic constructs of
-// Google Test work.
-
-#include "gtest/gtest.h"
-#include "googletest-param-test-test.h"
-
-using ::testing::Values;
-using ::testing::internal::ParamGenerator;
-
-// Tests that generators defined in a different translation unit
-// are functional. The test using extern_gen_2 is defined
-// in googletest-param-test-test.cc.
-ParamGenerator<int> extern_gen_2 = Values(33);
-
-// Tests that a parameterized test case can be defined in one translation unit
-// and instantiated in another. The test is defined in
-// googletest-param-test-test.cc and ExternalInstantiationTest fixture class is
-// defined in gtest-param-test_test.h.
-INSTANTIATE_TEST_SUITE_P(MultiplesOf33,
-                         ExternalInstantiationTest,
-                         Values(33, 66));
-
-// Tests that a parameterized test case can be instantiated
-// in multiple translation units. Another instantiation is defined
-// in googletest-param-test-test.cc and
-// InstantiationInMultipleTranslationUnitsTest fixture is defined in
-// gtest-param-test_test.h
-INSTANTIATE_TEST_SUITE_P(Sequence2,
-                         InstantiationInMultipleTranslationUnitsTest,
-                         Values(42*3, 42*4, 42*5));
-
diff --git a/3rdparty/gtest/test/googletest-throw-on-failure-test.py b/3rdparty/gtest/test/googletest-throw-on-failure-test.py
deleted file mode 100644
index ea627c47..00000000
--- a/3rdparty/gtest/test/googletest-throw-on-failure-test.py
+++ /dev/null
@@ -1,168 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests Google Test's throw-on-failure mode with exceptions disabled.
-
-This script invokes googletest-throw-on-failure-test_ (a program written with
-Google Test) with different environments and command line flags.
-"""
-
-import os
-import gtest_test_utils
-
-
-# Constants.
-
-# The command line flag for enabling/disabling the throw-on-failure mode.
-THROW_ON_FAILURE = 'gtest_throw_on_failure'
-
-# Path to the googletest-throw-on-failure-test_ program, compiled with
-# exceptions disabled.
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'googletest-throw-on-failure-test_')
-
-
-# Utilities.
-
-
-def SetEnvVar(env_var, value):
-  """Sets an environment variable to a given value; unsets it when the
-  given value is None.
-  """
-
-  env_var = env_var.upper()
-  if value is not None:
-    os.environ[env_var] = value
-  elif env_var in os.environ:
-    del os.environ[env_var]
-
-
-def Run(command):
-  """Runs a command; returns True/False if its exit code is/isn't 0."""
-
-  print('Running "%s". . .' % ' '.join(command))
-  p = gtest_test_utils.Subprocess(command)
-  return p.exited and p.exit_code == 0
-
-
-# The tests.
-class ThrowOnFailureTest(gtest_test_utils.TestCase):
-  """Tests the throw-on-failure mode."""
-
-  def RunAndVerify(self, env_var_value, flag_value, should_fail):
-    """Runs googletest-throw-on-failure-test_ and verifies that it does
-    (or does not) exit with a non-zero code.
-
-    Args:
-      env_var_value:    value of the GTEST_BREAK_ON_FAILURE environment
-                        variable; None if the variable should be unset.
-      flag_value:       value of the --gtest_break_on_failure flag;
-                        None if the flag should not be present.
-      should_fail:      True if and only if the program is expected to fail.
-    """
-
-    SetEnvVar(THROW_ON_FAILURE, env_var_value)
-
-    if env_var_value is None:
-      env_var_value_msg = ' is not set'
-    else:
-      env_var_value_msg = '=' + env_var_value
-
-    if flag_value is None:
-      flag = ''
-    elif flag_value == '0':
-      flag = '--%s=0' % THROW_ON_FAILURE
-    else:
-      flag = '--%s' % THROW_ON_FAILURE
-
-    command = [EXE_PATH]
-    if flag:
-      command.append(flag)
-
-    if should_fail:
-      should_or_not = 'should'
-    else:
-      should_or_not = 'should not'
-
-    failed = not Run(command)
-
-    SetEnvVar(THROW_ON_FAILURE, None)
-
-    msg = ('when %s%s, an assertion failure in "%s" %s cause a non-zero '
-           'exit code.' %
-           (THROW_ON_FAILURE, env_var_value_msg, ' '.join(command),
-            should_or_not))
-    self.assert_(failed == should_fail, msg)
-
-  def testDefaultBehavior(self):
-    """Tests the behavior of the default mode."""
-
-    self.RunAndVerify(env_var_value=None, flag_value=None, should_fail=False)
-
-  def testThrowOnFailureEnvVar(self):
-    """Tests using the GTEST_THROW_ON_FAILURE environment variable."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value=None,
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value=None,
-                      should_fail=True)
-
-  def testThrowOnFailureFlag(self):
-    """Tests using the --gtest_throw_on_failure flag."""
-
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value=None,
-                      flag_value='1',
-                      should_fail=True)
-
-  def testThrowOnFailureFlagOverridesEnvVar(self):
-    """Tests that --gtest_throw_on_failure overrides GTEST_THROW_ON_FAILURE."""
-
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='0',
-                      flag_value='1',
-                      should_fail=True)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='0',
-                      should_fail=False)
-    self.RunAndVerify(env_var_value='1',
-                      flag_value='1',
-                      should_fail=True)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-throw-on-failure-test_.cc b/3rdparty/gtest/test/googletest-throw-on-failure-test_.cc
deleted file mode 100644
index 83bb914c..00000000
--- a/3rdparty/gtest/test/googletest-throw-on-failure-test_.cc
+++ /dev/null
@@ -1,71 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's throw-on-failure mode with exceptions disabled.
-//
-// This program must be compiled with exceptions disabled.  It will be
-// invoked by googletest-throw-on-failure-test.py, and is expected to exit
-// with non-zero in the throw-on-failure mode or 0 otherwise.
-
-#include "gtest/gtest.h"
-
-#include <stdio.h>                      // for fflush, fprintf, NULL, etc.
-#include <stdlib.h>                     // for exit
-#include <exception>                    // for set_terminate
-
-// This terminate handler aborts the program using exit() rather than abort().
-// This avoids showing pop-ups on Windows systems and core dumps on Unix-like
-// ones.
-void TerminateHandler() {
-  fprintf(stderr, "%s\n", "Unhandled C++ exception terminating the program.");
-  fflush(nullptr);
-  exit(1);
-}
-
-int main(int argc, char** argv) {
-#if GTEST_HAS_EXCEPTIONS
-  std::set_terminate(&TerminateHandler);
-#endif
-  testing::InitGoogleTest(&argc, argv);
-
-  // We want to ensure that people can use Google Test assertions in
-  // other testing frameworks, as long as they initialize Google Test
-  // properly and set the throw-on-failure mode.  Therefore, we don't
-  // use Google Test's constructs for defining and running tests
-  // (e.g. TEST and RUN_ALL_TESTS) here.
-
-  // In the throw-on-failure mode with exceptions disabled, this
-  // assertion will cause the program to exit with a non-zero code.
-  EXPECT_EQ(2, 3);
-
-  // When not in the throw-on-failure mode, the control will reach
-  // here.
-  return 0;
-}
diff --git a/3rdparty/gtest/test/googletest-uninitialized-test.py b/3rdparty/gtest/test/googletest-uninitialized-test.py
deleted file mode 100644
index 69595a0d..00000000
--- a/3rdparty/gtest/test/googletest-uninitialized-test.py
+++ /dev/null
@@ -1,67 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Verifies that Google Test warns the user when not initialized properly."""
-
-import gtest_test_utils
-
-COMMAND = gtest_test_utils.GetTestExecutablePath('googletest-uninitialized-test_')
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-def AssertEq(expected, actual):
-  if expected != actual:
-    print('Expected: %s' % (expected,))
-    print('  Actual: %s' % (actual,))
-    raise AssertionError
-
-
-def TestExitCodeAndOutput(command):
-  """Runs the given command and verifies its exit code and output."""
-
-  # Verifies that 'command' exits with code 1.
-  p = gtest_test_utils.Subprocess(command)
-  if p.exited and p.exit_code == 0:
-    Assert('IMPORTANT NOTICE' in p.output);
-  Assert('InitGoogleTest' in p.output)
-
-
-class GTestUninitializedTest(gtest_test_utils.TestCase):
-  def testExitCodeAndOutput(self):
-    TestExitCodeAndOutput(COMMAND)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/googletest-uninitialized-test_.cc b/3rdparty/gtest/test/googletest-uninitialized-test_.cc
deleted file mode 100644
index b4434d51..00000000
--- a/3rdparty/gtest/test/googletest-uninitialized-test_.cc
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-TEST(DummyTest, Dummy) {
-  // This test doesn't verify anything.  We just need it to create a
-  // realistic stage for testing the behavior of Google Test when
-  // RUN_ALL_TESTS() is called without
-  // testing::InitGoogleTest() being called first.
-}
-
-int main() {
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest-typed-test2_test.cc b/3rdparty/gtest/test/gtest-typed-test2_test.cc
deleted file mode 100644
index 70001604..00000000
--- a/3rdparty/gtest/test/gtest-typed-test2_test.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include <vector>
-
-#include "test/gtest-typed-test_test.h"
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_TYPED_TEST_P
-
-// Tests that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// (ContainerTest is also instantiated in gtest-typed-test_test.cc.)
-INSTANTIATE_TYPED_TEST_SUITE_P(Vector, ContainerTest,
-                               testing::Types<std::vector<int> >);
-
-#endif  // GTEST_HAS_TYPED_TEST_P
diff --git a/3rdparty/gtest/test/gtest-typed-test_test.cc b/3rdparty/gtest/test/gtest-typed-test_test.cc
deleted file mode 100644
index 5411832a..00000000
--- a/3rdparty/gtest/test/gtest-typed-test_test.cc
+++ /dev/null
@@ -1,462 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "test/gtest-typed-test_test.h"
-
-#include <set>
-#include <type_traits>
-#include <vector>
-
-#include "gtest/gtest.h"
-
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127 /* conditional expression is constant */)
-#endif  //  _MSC_VER
-
-using testing::Test;
-
-// Used for testing that SetUpTestSuite()/TearDownTestSuite(), fixture
-// ctor/dtor, and SetUp()/TearDown() work correctly in typed tests and
-// type-parameterized test.
-template <typename T>
-class CommonTest : public Test {
-  // For some technical reason, SetUpTestSuite() and TearDownTestSuite()
-  // must be public.
- public:
-  static void SetUpTestSuite() {
-    shared_ = new T(5);
-  }
-
-  static void TearDownTestSuite() {
-    delete shared_;
-    shared_ = nullptr;
-  }
-
-  // This 'protected:' is optional.  There's no harm in making all
-  // members of this fixture class template public.
- protected:
-  // We used to use std::list here, but switched to std::vector since
-  // MSVC's <list> doesn't compile cleanly with /W4.
-  typedef std::vector<T> Vector;
-  typedef std::set<int> IntSet;
-
-  CommonTest() : value_(1) {}
-
-  ~CommonTest() override { EXPECT_EQ(3, value_); }
-
-  void SetUp() override {
-    EXPECT_EQ(1, value_);
-    value_++;
-  }
-
-  void TearDown() override {
-    EXPECT_EQ(2, value_);
-    value_++;
-  }
-
-  T value_;
-  static T* shared_;
-};
-
-template <typename T>
-T* CommonTest<T>::shared_ = nullptr;
-
-// This #ifdef block tests typed tests.
-#if GTEST_HAS_TYPED_TEST
-
-using testing::Types;
-
-// Tests that SetUpTestSuite()/TearDownTestSuite(), fixture ctor/dtor,
-// and SetUp()/TearDown() work correctly in typed tests
-
-typedef Types<char, int> TwoTypes;
-TYPED_TEST_SUITE(CommonTest, TwoTypes);
-
-TYPED_TEST(CommonTest, ValuesAreCorrect) {
-  // Static members of the fixture class template can be visited via
-  // the TestFixture:: prefix.
-  EXPECT_EQ(5, *TestFixture::shared_);
-
-  // Typedefs in the fixture class template can be visited via the
-  // "typename TestFixture::" prefix.
-  typename TestFixture::Vector empty;
-  EXPECT_EQ(0U, empty.size());
-
-  typename TestFixture::IntSet empty2;
-  EXPECT_EQ(0U, empty2.size());
-
-  // Non-static members of the fixture class must be visited via
-  // 'this', as required by C++ for class templates.
-  EXPECT_EQ(2, this->value_);
-}
-
-// The second test makes sure shared_ is not deleted after the first
-// test.
-TYPED_TEST(CommonTest, ValuesAreStillCorrect) {
-  // Static members of the fixture class template can also be visited
-  // via 'this'.
-  ASSERT_TRUE(this->shared_ != nullptr);
-  EXPECT_EQ(5, *this->shared_);
-
-  // TypeParam can be used to refer to the type parameter.
-  EXPECT_EQ(static_cast<TypeParam>(2), this->value_);
-}
-
-// Tests that multiple TYPED_TEST_SUITE's can be defined in the same
-// translation unit.
-
-template <typename T>
-class TypedTest1 : public Test {
-};
-
-// Verifies that the second argument of TYPED_TEST_SUITE can be a
-// single type.
-TYPED_TEST_SUITE(TypedTest1, int);
-TYPED_TEST(TypedTest1, A) {}
-
-template <typename T>
-class TypedTest2 : public Test {
-};
-
-// Verifies that the second argument of TYPED_TEST_SUITE can be a
-// Types<...> type list.
-TYPED_TEST_SUITE(TypedTest2, Types<int>);
-
-// This also verifies that tests from different typed test cases can
-// share the same name.
-TYPED_TEST(TypedTest2, A) {}
-
-// Tests that a typed test case can be defined in a namespace.
-
-namespace library1 {
-
-template <typename T>
-class NumericTest : public Test {
-};
-
-typedef Types<int, long> NumericTypes;
-TYPED_TEST_SUITE(NumericTest, NumericTypes);
-
-TYPED_TEST(NumericTest, DefaultIsZero) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-}  // namespace library1
-
-// Tests that custom names work.
-template <typename T>
-class TypedTestWithNames : public Test {};
-
-class TypedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value) {
-      return std::string("char") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, int>::value) {
-      return std::string("int") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-TYPED_TEST_SUITE(TypedTestWithNames, TwoTypes, TypedTestNames);
-
-TYPED_TEST(TypedTestWithNames, TestSuiteName) {
-  if (std::is_same<TypeParam, char>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_case_name(),
-                 "TypedTestWithNames/char0");
-  }
-  if (std::is_same<TypeParam, int>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_case_name(),
-                 "TypedTestWithNames/int1");
-  }
-}
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-// This #ifdef block tests type-parameterized tests.
-#if GTEST_HAS_TYPED_TEST_P
-
-using testing::Types;
-using testing::internal::TypedTestSuitePState;
-
-// Tests TypedTestSuitePState.
-
-class TypedTestSuitePStateTest : public Test {
- protected:
-  void SetUp() override {
-    state_.AddTestName("foo.cc", 0, "FooTest", "A");
-    state_.AddTestName("foo.cc", 0, "FooTest", "B");
-    state_.AddTestName("foo.cc", 0, "FooTest", "C");
-  }
-
-  TypedTestSuitePState state_;
-};
-
-TEST_F(TypedTestSuitePStateTest, SucceedsForMatchingList) {
-  const char* tests = "A, B, C";
-  EXPECT_EQ(tests,
-            state_.VerifyRegisteredTestNames("foo.cc", 1, tests));
-}
-
-// Makes sure that the order of the tests and spaces around the names
-// don't matter.
-TEST_F(TypedTestSuitePStateTest, IgnoresOrderAndSpaces) {
-  const char* tests = "A,C,   B";
-  EXPECT_EQ(tests,
-            state_.VerifyRegisteredTestNames("foo.cc", 1, tests));
-}
-
-using TypedTestSuitePStateDeathTest = TypedTestSuitePStateTest;
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsDuplicates) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("foo.cc", 1, "A, B, A, C"),
-      "foo\\.cc.1.?: Test A is listed more than once\\.");
-}
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsExtraTest) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("foo.cc", 1, "A, B, C, D"),
-      "foo\\.cc.1.?: No test named D can be found in this test suite\\.");
-}
-
-TEST_F(TypedTestSuitePStateDeathTest, DetectsMissedTest) {
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.VerifyRegisteredTestNames("foo.cc", 1, "A, C"),
-      "foo\\.cc.1.?: You forgot to list test B\\.");
-}
-
-// Tests that defining a test for a parameterized test case generates
-// a run-time error if the test case has been registered.
-TEST_F(TypedTestSuitePStateDeathTest, DetectsTestAfterRegistration) {
-  state_.VerifyRegisteredTestNames("foo.cc", 1, "A, B, C");
-  EXPECT_DEATH_IF_SUPPORTED(
-      state_.AddTestName("foo.cc", 2, "FooTest", "D"),
-      "foo\\.cc.2.?: Test D must be defined before REGISTER_TYPED_TEST_SUITE_P"
-      "\\(FooTest, \\.\\.\\.\\)\\.");
-}
-
-// Tests that SetUpTestSuite()/TearDownTestSuite(), fixture ctor/dtor,
-// and SetUp()/TearDown() work correctly in type-parameterized tests.
-
-template <typename T>
-class DerivedTest : public CommonTest<T> {
-};
-
-TYPED_TEST_SUITE_P(DerivedTest);
-
-TYPED_TEST_P(DerivedTest, ValuesAreCorrect) {
-  // Static members of the fixture class template can be visited via
-  // the TestFixture:: prefix.
-  EXPECT_EQ(5, *TestFixture::shared_);
-
-  // Non-static members of the fixture class must be visited via
-  // 'this', as required by C++ for class templates.
-  EXPECT_EQ(2, this->value_);
-}
-
-// The second test makes sure shared_ is not deleted after the first
-// test.
-TYPED_TEST_P(DerivedTest, ValuesAreStillCorrect) {
-  // Static members of the fixture class template can also be visited
-  // via 'this'.
-  ASSERT_TRUE(this->shared_ != nullptr);
-  EXPECT_EQ(5, *this->shared_);
-  EXPECT_EQ(2, this->value_);
-}
-
-REGISTER_TYPED_TEST_SUITE_P(DerivedTest,
-                           ValuesAreCorrect, ValuesAreStillCorrect);
-
-typedef Types<short, long> MyTwoTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, DerivedTest, MyTwoTypes);
-
-// Tests that custom names work with type parametrized tests. We reuse the
-// TwoTypes from above here.
-template <typename T>
-class TypeParametrizedTestWithNames : public Test {};
-
-TYPED_TEST_SUITE_P(TypeParametrizedTestWithNames);
-
-TYPED_TEST_P(TypeParametrizedTestWithNames, TestSuiteName) {
-  if (std::is_same<TypeParam, char>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_case_name(),
-                 "CustomName/TypeParametrizedTestWithNames/parChar0");
-  }
-  if (std::is_same<TypeParam, int>::value) {
-    EXPECT_STREQ(::testing::UnitTest::GetInstance()
-                     ->current_test_info()
-                     ->test_case_name(),
-                 "CustomName/TypeParametrizedTestWithNames/parInt1");
-  }
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypeParametrizedTestWithNames, TestSuiteName);
-
-class TypeParametrizedTestNames {
- public:
-  template <typename T>
-  static std::string GetName(int i) {
-    if (std::is_same<T, char>::value) {
-      return std::string("parChar") + ::testing::PrintToString(i);
-    }
-    if (std::is_same<T, int>::value) {
-      return std::string("parInt") + ::testing::PrintToString(i);
-    }
-  }
-};
-
-INSTANTIATE_TYPED_TEST_SUITE_P(CustomName, TypeParametrizedTestWithNames,
-                              TwoTypes, TypeParametrizedTestNames);
-
-// Tests that multiple TYPED_TEST_SUITE_P's can be defined in the same
-// translation unit.
-
-template <typename T>
-class TypedTestP1 : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP1);
-
-// For testing that the code between TYPED_TEST_SUITE_P() and
-// TYPED_TEST_P() is not enclosed in a namespace.
-using IntAfterTypedTestSuiteP = int;
-
-TYPED_TEST_P(TypedTestP1, A) {}
-TYPED_TEST_P(TypedTestP1, B) {}
-
-// For testing that the code between TYPED_TEST_P() and
-// REGISTER_TYPED_TEST_SUITE_P() is not enclosed in a namespace.
-using IntBeforeRegisterTypedTestSuiteP = int;
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP1, A, B);
-
-template <typename T>
-class TypedTestP2 : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP2);
-
-// This also verifies that tests from different type-parameterized
-// test cases can share the same name.
-TYPED_TEST_P(TypedTestP2, A) {}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP2, A);
-
-// Verifies that the code between TYPED_TEST_SUITE_P() and
-// REGISTER_TYPED_TEST_SUITE_P() is not enclosed in a namespace.
-IntAfterTypedTestSuiteP after = 0;
-IntBeforeRegisterTypedTestSuiteP before = 0;
-
-// Verifies that the last argument of INSTANTIATE_TYPED_TEST_SUITE_P()
-// can be either a single type or a Types<...> type list.
-INSTANTIATE_TYPED_TEST_SUITE_P(Int, TypedTestP1, int);
-INSTANTIATE_TYPED_TEST_SUITE_P(Int, TypedTestP2, Types<int>);
-
-// Tests that the same type-parameterized test case can be
-// instantiated more than once in the same translation unit.
-INSTANTIATE_TYPED_TEST_SUITE_P(Double, TypedTestP2, Types<double>);
-
-// Tests that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// (ContainerTest is also instantiated in gtest-typed-test_test.cc.)
-typedef Types<std::vector<double>, std::set<char> > MyContainers;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, ContainerTest, MyContainers);
-
-// Tests that a type-parameterized test case can be defined and
-// instantiated in a namespace.
-
-namespace library2 {
-
-template <typename T>
-class NumericTest : public Test {
-};
-
-TYPED_TEST_SUITE_P(NumericTest);
-
-TYPED_TEST_P(NumericTest, DefaultIsZero) {
-  EXPECT_EQ(0, TypeParam());
-}
-
-TYPED_TEST_P(NumericTest, ZeroIsLessThanOne) {
-  EXPECT_LT(TypeParam(0), TypeParam(1));
-}
-
-REGISTER_TYPED_TEST_SUITE_P(NumericTest,
-                           DefaultIsZero, ZeroIsLessThanOne);
-typedef Types<int, double> NumericTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, NumericTest, NumericTypes);
-
-static const char* GetTestName() {
-  return testing::UnitTest::GetInstance()->current_test_info()->name();
-}
-// Test the stripping of space from test names
-template <typename T> class TrimmedTest : public Test { };
-TYPED_TEST_SUITE_P(TrimmedTest);
-TYPED_TEST_P(TrimmedTest, Test1) { EXPECT_STREQ("Test1", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test2) { EXPECT_STREQ("Test2", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test3) { EXPECT_STREQ("Test3", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test4) { EXPECT_STREQ("Test4", GetTestName()); }
-TYPED_TEST_P(TrimmedTest, Test5) { EXPECT_STREQ("Test5", GetTestName()); }
-REGISTER_TYPED_TEST_SUITE_P(
-    TrimmedTest,
-    Test1, Test2,Test3 , Test4 ,Test5 );  // NOLINT
-template <typename T1, typename T2> struct MyPair {};
-// Be sure to try a type with a comma in its name just in case it matters.
-typedef Types<int, double, MyPair<int, int> > TrimTypes;
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TrimmedTest, TrimTypes);
-
-}  // namespace library2
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-#if !defined(GTEST_HAS_TYPED_TEST) && !defined(GTEST_HAS_TYPED_TEST_P)
-
-// Google Test may not support type-parameterized tests with some
-// compilers. If we use conditional compilation to compile out all
-// code referring to the gtest_main library, MSVC linker will not link
-// that library at all and consequently complain about missing entry
-// point defined in that library (fatal error LNK1561: entry point
-// must be defined). This dummy test keeps gtest_main linked in.
-TEST(DummyTest, TypedTestsAreNotSupportedOnThisPlatform) {}
-
-#if _MSC_VER
-GTEST_DISABLE_MSC_WARNINGS_POP_()  //  4127
-#endif                             //  _MSC_VER
-
-#endif  // #if !defined(GTEST_HAS_TYPED_TEST) && !defined(GTEST_HAS_TYPED_TEST_P)
diff --git a/3rdparty/gtest/test/gtest-typed-test_test.h b/3rdparty/gtest/test/gtest-typed-test_test.h
deleted file mode 100644
index 23137b7e..00000000
--- a/3rdparty/gtest/test/gtest-typed-test_test.h
+++ /dev/null
@@ -1,65 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#ifndef GTEST_TEST_GTEST_TYPED_TEST_TEST_H_
-#define GTEST_TEST_GTEST_TYPED_TEST_TEST_H_
-
-#include "gtest/gtest.h"
-
-#if GTEST_HAS_TYPED_TEST_P
-
-using testing::Test;
-
-// For testing that the same type-parameterized test case can be
-// instantiated in different translation units linked together.
-// ContainerTest will be instantiated in both gtest-typed-test_test.cc
-// and gtest-typed-test2_test.cc.
-
-template <typename T>
-class ContainerTest : public Test {
-};
-
-TYPED_TEST_SUITE_P(ContainerTest);
-
-TYPED_TEST_P(ContainerTest, CanBeDefaultConstructed) {
-  TypeParam container;
-}
-
-TYPED_TEST_P(ContainerTest, InitialSizeIsZero) {
-  TypeParam container;
-  EXPECT_EQ(0U, container.size());
-}
-
-REGISTER_TYPED_TEST_SUITE_P(ContainerTest,
-                            CanBeDefaultConstructed, InitialSizeIsZero);
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-#endif  // GTEST_TEST_GTEST_TYPED_TEST_TEST_H_
diff --git a/3rdparty/gtest/test/gtest-unittest-api_test.cc b/3rdparty/gtest/test/gtest-unittest-api_test.cc
deleted file mode 100644
index 480a41fb..00000000
--- a/3rdparty/gtest/test/gtest-unittest-api_test.cc
+++ /dev/null
@@ -1,340 +0,0 @@
-// Copyright 2009 Google Inc.  All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// The Google C++ Testing and Mocking Framework (Google Test)
-//
-// This file contains tests verifying correctness of data provided via
-// UnitTest's public methods.
-
-#include "gtest/gtest.h"
-
-#include <string.h>  // For strcmp.
-#include <algorithm>
-
-using ::testing::InitGoogleTest;
-
-namespace testing {
-namespace internal {
-
-template <typename T>
-struct LessByName {
-  bool operator()(const T* a, const T* b) {
-    return strcmp(a->name(), b->name()) < 0;
-  }
-};
-
-class UnitTestHelper {
- public:
-  // Returns the array of pointers to all test suites sorted by the test suite
-  // name.  The caller is responsible for deleting the array.
-  static TestSuite const** GetSortedTestSuites() {
-    UnitTest& unit_test = *UnitTest::GetInstance();
-    auto const** const test_suites =
-        new const TestSuite*[unit_test.total_test_suite_count()];
-
-    for (int i = 0; i < unit_test.total_test_suite_count(); ++i)
-      test_suites[i] = unit_test.GetTestSuite(i);
-
-    std::sort(test_suites,
-              test_suites + unit_test.total_test_suite_count(),
-              LessByName<TestSuite>());
-    return test_suites;
-  }
-
-  // Returns the test suite by its name.  The caller doesn't own the returned
-  // pointer.
-  static const TestSuite* FindTestSuite(const char* name) {
-    UnitTest& unit_test = *UnitTest::GetInstance();
-    for (int i = 0; i < unit_test.total_test_suite_count(); ++i) {
-      const TestSuite* test_suite = unit_test.GetTestSuite(i);
-      if (0 == strcmp(test_suite->name(), name))
-        return test_suite;
-    }
-    return nullptr;
-  }
-
-  // Returns the array of pointers to all tests in a particular test suite
-  // sorted by the test name.  The caller is responsible for deleting the
-  // array.
-  static TestInfo const** GetSortedTests(const TestSuite* test_suite) {
-    TestInfo const** const tests =
-        new const TestInfo*[test_suite->total_test_count()];
-
-    for (int i = 0; i < test_suite->total_test_count(); ++i)
-      tests[i] = test_suite->GetTestInfo(i);
-
-    std::sort(tests, tests + test_suite->total_test_count(),
-              LessByName<TestInfo>());
-    return tests;
-  }
-};
-
-#if GTEST_HAS_TYPED_TEST
-template <typename T> class TestSuiteWithCommentTest : public Test {};
-TYPED_TEST_SUITE(TestSuiteWithCommentTest, Types<int>);
-TYPED_TEST(TestSuiteWithCommentTest, Dummy) {}
-
-const int kTypedTestSuites = 1;
-const int kTypedTests = 1;
-#else
-const int kTypedTestSuites = 0;
-const int kTypedTests = 0;
-#endif  // GTEST_HAS_TYPED_TEST
-
-// We can only test the accessors that do not change value while tests run.
-// Since tests can be run in any order, the values the accessors that track
-// test execution (such as failed_test_count) can not be predicted.
-TEST(ApiTest, UnitTestImmutableAccessorsWork) {
-  UnitTest* unit_test = UnitTest::GetInstance();
-
-  ASSERT_EQ(2 + kTypedTestSuites, unit_test->total_test_suite_count());
-  EXPECT_EQ(1 + kTypedTestSuites, unit_test->test_suite_to_run_count());
-  EXPECT_EQ(2, unit_test->disabled_test_count());
-  EXPECT_EQ(5 + kTypedTests, unit_test->total_test_count());
-  EXPECT_EQ(3 + kTypedTests, unit_test->test_to_run_count());
-
-  const TestSuite** const test_suites = UnitTestHelper::GetSortedTestSuites();
-
-  EXPECT_STREQ("ApiTest", test_suites[0]->name());
-  EXPECT_STREQ("DISABLED_Test", test_suites[1]->name());
-#if GTEST_HAS_TYPED_TEST
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suites[2]->name());
-#endif  // GTEST_HAS_TYPED_TEST
-
-  delete[] test_suites;
-
-  // The following lines initiate actions to verify certain methods in
-  // FinalSuccessChecker::TearDown.
-
-  // Records a test property to verify TestResult::GetTestProperty().
-  RecordProperty("key", "value");
-}
-
-AssertionResult IsNull(const char* str) {
-  if (str != nullptr) {
-    return testing::AssertionFailure() << "argument is " << str;
-  }
-  return AssertionSuccess();
-}
-
-TEST(ApiTest, TestSuiteImmutableAccessorsWork) {
-  const TestSuite* test_suite = UnitTestHelper::FindTestSuite("ApiTest");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("ApiTest", test_suite->name());
-  EXPECT_TRUE(IsNull(test_suite->type_param()));
-  EXPECT_TRUE(test_suite->should_run());
-  EXPECT_EQ(1, test_suite->disabled_test_count());
-  EXPECT_EQ(3, test_suite->test_to_run_count());
-  ASSERT_EQ(4, test_suite->total_test_count());
-
-  const TestInfo** tests = UnitTestHelper::GetSortedTests(test_suite);
-
-  EXPECT_STREQ("DISABLED_Dummy1", tests[0]->name());
-  EXPECT_STREQ("ApiTest", tests[0]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[0]->value_param()));
-  EXPECT_TRUE(IsNull(tests[0]->type_param()));
-  EXPECT_FALSE(tests[0]->should_run());
-
-  EXPECT_STREQ("TestSuiteDisabledAccessorsWork", tests[1]->name());
-  EXPECT_STREQ("ApiTest", tests[1]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[1]->value_param()));
-  EXPECT_TRUE(IsNull(tests[1]->type_param()));
-  EXPECT_TRUE(tests[1]->should_run());
-
-  EXPECT_STREQ("TestSuiteImmutableAccessorsWork", tests[2]->name());
-  EXPECT_STREQ("ApiTest", tests[2]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[2]->value_param()));
-  EXPECT_TRUE(IsNull(tests[2]->type_param()));
-  EXPECT_TRUE(tests[2]->should_run());
-
-  EXPECT_STREQ("UnitTestImmutableAccessorsWork", tests[3]->name());
-  EXPECT_STREQ("ApiTest", tests[3]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[3]->value_param()));
-  EXPECT_TRUE(IsNull(tests[3]->type_param()));
-  EXPECT_TRUE(tests[3]->should_run());
-
-  delete[] tests;
-  tests = nullptr;
-
-#if GTEST_HAS_TYPED_TEST
-  test_suite = UnitTestHelper::FindTestSuite("TestSuiteWithCommentTest/0");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suite->name());
-  EXPECT_STREQ(GetTypeName<int>().c_str(), test_suite->type_param());
-  EXPECT_TRUE(test_suite->should_run());
-  EXPECT_EQ(0, test_suite->disabled_test_count());
-  EXPECT_EQ(1, test_suite->test_to_run_count());
-  ASSERT_EQ(1, test_suite->total_test_count());
-
-  tests = UnitTestHelper::GetSortedTests(test_suite);
-
-  EXPECT_STREQ("Dummy", tests[0]->name());
-  EXPECT_STREQ("TestSuiteWithCommentTest/0", tests[0]->test_suite_name());
-  EXPECT_TRUE(IsNull(tests[0]->value_param()));
-  EXPECT_STREQ(GetTypeName<int>().c_str(), tests[0]->type_param());
-  EXPECT_TRUE(tests[0]->should_run());
-
-  delete[] tests;
-#endif  // GTEST_HAS_TYPED_TEST
-}
-
-TEST(ApiTest, TestSuiteDisabledAccessorsWork) {
-  const TestSuite* test_suite = UnitTestHelper::FindTestSuite("DISABLED_Test");
-  ASSERT_TRUE(test_suite != nullptr);
-
-  EXPECT_STREQ("DISABLED_Test", test_suite->name());
-  EXPECT_TRUE(IsNull(test_suite->type_param()));
-  EXPECT_FALSE(test_suite->should_run());
-  EXPECT_EQ(1, test_suite->disabled_test_count());
-  EXPECT_EQ(0, test_suite->test_to_run_count());
-  ASSERT_EQ(1, test_suite->total_test_count());
-
-  const TestInfo* const test_info = test_suite->GetTestInfo(0);
-  EXPECT_STREQ("Dummy2", test_info->name());
-  EXPECT_STREQ("DISABLED_Test", test_info->test_suite_name());
-  EXPECT_TRUE(IsNull(test_info->value_param()));
-  EXPECT_TRUE(IsNull(test_info->type_param()));
-  EXPECT_FALSE(test_info->should_run());
-}
-
-// These two tests are here to provide support for testing
-// test_suite_to_run_count, disabled_test_count, and test_to_run_count.
-TEST(ApiTest, DISABLED_Dummy1) {}
-TEST(DISABLED_Test, Dummy2) {}
-
-class FinalSuccessChecker : public Environment {
- protected:
-  void TearDown() override {
-    UnitTest* unit_test = UnitTest::GetInstance();
-
-    EXPECT_EQ(1 + kTypedTestSuites, unit_test->successful_test_suite_count());
-    EXPECT_EQ(3 + kTypedTests, unit_test->successful_test_count());
-    EXPECT_EQ(0, unit_test->failed_test_suite_count());
-    EXPECT_EQ(0, unit_test->failed_test_count());
-    EXPECT_TRUE(unit_test->Passed());
-    EXPECT_FALSE(unit_test->Failed());
-    ASSERT_EQ(2 + kTypedTestSuites, unit_test->total_test_suite_count());
-
-    const TestSuite** const test_suites = UnitTestHelper::GetSortedTestSuites();
-
-    EXPECT_STREQ("ApiTest", test_suites[0]->name());
-    EXPECT_TRUE(IsNull(test_suites[0]->type_param()));
-    EXPECT_TRUE(test_suites[0]->should_run());
-    EXPECT_EQ(1, test_suites[0]->disabled_test_count());
-    ASSERT_EQ(4, test_suites[0]->total_test_count());
-    EXPECT_EQ(3, test_suites[0]->successful_test_count());
-    EXPECT_EQ(0, test_suites[0]->failed_test_count());
-    EXPECT_TRUE(test_suites[0]->Passed());
-    EXPECT_FALSE(test_suites[0]->Failed());
-
-    EXPECT_STREQ("DISABLED_Test", test_suites[1]->name());
-    EXPECT_TRUE(IsNull(test_suites[1]->type_param()));
-    EXPECT_FALSE(test_suites[1]->should_run());
-    EXPECT_EQ(1, test_suites[1]->disabled_test_count());
-    ASSERT_EQ(1, test_suites[1]->total_test_count());
-    EXPECT_EQ(0, test_suites[1]->successful_test_count());
-    EXPECT_EQ(0, test_suites[1]->failed_test_count());
-
-#if GTEST_HAS_TYPED_TEST
-    EXPECT_STREQ("TestSuiteWithCommentTest/0", test_suites[2]->name());
-    EXPECT_STREQ(GetTypeName<int>().c_str(), test_suites[2]->type_param());
-    EXPECT_TRUE(test_suites[2]->should_run());
-    EXPECT_EQ(0, test_suites[2]->disabled_test_count());
-    ASSERT_EQ(1, test_suites[2]->total_test_count());
-    EXPECT_EQ(1, test_suites[2]->successful_test_count());
-    EXPECT_EQ(0, test_suites[2]->failed_test_count());
-    EXPECT_TRUE(test_suites[2]->Passed());
-    EXPECT_FALSE(test_suites[2]->Failed());
-#endif  // GTEST_HAS_TYPED_TEST
-
-    const TestSuite* test_suite = UnitTestHelper::FindTestSuite("ApiTest");
-    const TestInfo** tests = UnitTestHelper::GetSortedTests(test_suite);
-    EXPECT_STREQ("DISABLED_Dummy1", tests[0]->name());
-    EXPECT_STREQ("ApiTest", tests[0]->test_suite_name());
-    EXPECT_FALSE(tests[0]->should_run());
-
-    EXPECT_STREQ("TestSuiteDisabledAccessorsWork", tests[1]->name());
-    EXPECT_STREQ("ApiTest", tests[1]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[1]->value_param()));
-    EXPECT_TRUE(IsNull(tests[1]->type_param()));
-    EXPECT_TRUE(tests[1]->should_run());
-    EXPECT_TRUE(tests[1]->result()->Passed());
-    EXPECT_EQ(0, tests[1]->result()->test_property_count());
-
-    EXPECT_STREQ("TestSuiteImmutableAccessorsWork", tests[2]->name());
-    EXPECT_STREQ("ApiTest", tests[2]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[2]->value_param()));
-    EXPECT_TRUE(IsNull(tests[2]->type_param()));
-    EXPECT_TRUE(tests[2]->should_run());
-    EXPECT_TRUE(tests[2]->result()->Passed());
-    EXPECT_EQ(0, tests[2]->result()->test_property_count());
-
-    EXPECT_STREQ("UnitTestImmutableAccessorsWork", tests[3]->name());
-    EXPECT_STREQ("ApiTest", tests[3]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[3]->value_param()));
-    EXPECT_TRUE(IsNull(tests[3]->type_param()));
-    EXPECT_TRUE(tests[3]->should_run());
-    EXPECT_TRUE(tests[3]->result()->Passed());
-    EXPECT_EQ(1, tests[3]->result()->test_property_count());
-    const TestProperty& property = tests[3]->result()->GetTestProperty(0);
-    EXPECT_STREQ("key", property.key());
-    EXPECT_STREQ("value", property.value());
-
-    delete[] tests;
-
-#if GTEST_HAS_TYPED_TEST
-    test_suite = UnitTestHelper::FindTestSuite("TestSuiteWithCommentTest/0");
-    tests = UnitTestHelper::GetSortedTests(test_suite);
-
-    EXPECT_STREQ("Dummy", tests[0]->name());
-    EXPECT_STREQ("TestSuiteWithCommentTest/0", tests[0]->test_suite_name());
-    EXPECT_TRUE(IsNull(tests[0]->value_param()));
-    EXPECT_STREQ(GetTypeName<int>().c_str(), tests[0]->type_param());
-    EXPECT_TRUE(tests[0]->should_run());
-    EXPECT_TRUE(tests[0]->result()->Passed());
-    EXPECT_EQ(0, tests[0]->result()->test_property_count());
-
-    delete[] tests;
-#endif  // GTEST_HAS_TYPED_TEST
-    delete[] test_suites;
-  }
-};
-
-}  // namespace internal
-}  // namespace testing
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-
-  AddGlobalTestEnvironment(new testing::internal::FinalSuccessChecker());
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest_all_test.cc b/3rdparty/gtest/test/gtest_all_test.cc
deleted file mode 100644
index 615b29b7..00000000
--- a/3rdparty/gtest/test/gtest_all_test.cc
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google C++ Testing and Mocking Framework (Google Test)
-//
-// Sometimes it's desirable to build most of Google Test's own tests
-// by compiling a single file.  This file serves this purpose.
-#include "test/googletest-filepath-test.cc"
-#include "test/googletest-message-test.cc"
-#include "test/googletest-options-test.cc"
-#include "test/googletest-port-test.cc"
-#include "test/googletest-test-part-test.cc"
-#include "test/gtest-typed-test2_test.cc"
-#include "test/gtest-typed-test_test.cc"
-#include "test/gtest_pred_impl_unittest.cc"
-#include "test/gtest_prod_test.cc"
-#include "test/gtest_skip_test.cc"
-#include "test/gtest_unittest.cc"
-#include "test/production.cc"
diff --git a/3rdparty/gtest/test/gtest_assert_by_exception_test.cc b/3rdparty/gtest/test/gtest_assert_by_exception_test.cc
deleted file mode 100644
index ada4cb30..00000000
--- a/3rdparty/gtest/test/gtest_assert_by_exception_test.cc
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's assert-by-exception mode with exceptions enabled.
-
-#include "gtest/gtest.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdexcept>
-
-class ThrowListener : public testing::EmptyTestEventListener {
-  void OnTestPartResult(const testing::TestPartResult& result) override {
-    if (result.type() == testing::TestPartResult::kFatalFailure) {
-      throw testing::AssertionException(result);
-    }
-  }
-};
-
-// Prints the given failure message and exits the program with
-// non-zero.  We use this instead of a Google Test assertion to
-// indicate a failure, as the latter is been tested and cannot be
-// relied on.
-void Fail(const char* msg) {
-  printf("FAILURE: %s\n", msg);
-  fflush(stdout);
-  exit(1);
-}
-
-static void AssertFalse() {
-  ASSERT_EQ(2, 3) << "Expected failure";
-}
-
-// Tests that an assertion failure throws a subclass of
-// std::runtime_error.
-TEST(Test, Test) {
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 3);
-  } catch(...) {
-    Fail("A successful assertion wrongfully threw.");
-  }
-
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 4);
-  } catch(...) {
-    Fail("A failed non-fatal assertion wrongfully threw.");
-  }
-
-  // A failed assertion should throw.
-  try {
-    AssertFalse();
-  } catch(const testing::AssertionException& e) {
-    if (strstr(e.what(), "Expected failure") != nullptr) throw;
-
-    printf("%s",
-           "A failed assertion did throw an exception of the right type, "
-           "but the message is incorrect.  Instead of containing \"Expected "
-           "failure\", it is:\n");
-    Fail(e.what());
-  } catch(...) {
-    Fail("A failed assertion threw the wrong type of exception.");
-  }
-  Fail("A failed assertion should've thrown but didn't.");
-}
-
-int kTestForContinuingTest = 0;
-
-TEST(Test, Test2) {
-  kTestForContinuingTest = 1;
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-  testing::UnitTest::GetInstance()->listeners().Append(new ThrowListener);
-
-  int result = RUN_ALL_TESTS();
-  if (result == 0) {
-    printf("RUN_ALL_TESTS returned %d\n", result);
-    Fail("Expected failure instead.");
-  }
-
-  if (kTestForContinuingTest == 0) {
-    Fail("Should have continued with other tests, but did not.");
-  }
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_environment_test.cc b/3rdparty/gtest/test/gtest_environment_test.cc
deleted file mode 100644
index 064bfc50..00000000
--- a/3rdparty/gtest/test/gtest_environment_test.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests using global test environments.
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-GTEST_DECLARE_string_(filter);
-}
-
-namespace {
-
-enum FailureType {
-  NO_FAILURE, NON_FATAL_FAILURE, FATAL_FAILURE
-};
-
-// For testing using global test environments.
-class MyEnvironment : public testing::Environment {
- public:
-  MyEnvironment() { Reset(); }
-
-  // Depending on the value of failure_in_set_up_, SetUp() will
-  // generate a non-fatal failure, generate a fatal failure, or
-  // succeed.
-  void SetUp() override {
-    set_up_was_run_ = true;
-
-    switch (failure_in_set_up_) {
-      case NON_FATAL_FAILURE:
-        ADD_FAILURE() << "Expected non-fatal failure in global set-up.";
-        break;
-      case FATAL_FAILURE:
-        FAIL() << "Expected fatal failure in global set-up.";
-        break;
-      default:
-        break;
-    }
-  }
-
-  // Generates a non-fatal failure.
-  void TearDown() override {
-    tear_down_was_run_ = true;
-    ADD_FAILURE() << "Expected non-fatal failure in global tear-down.";
-  }
-
-  // Resets the state of the environment s.t. it can be reused.
-  void Reset() {
-    failure_in_set_up_ = NO_FAILURE;
-    set_up_was_run_ = false;
-    tear_down_was_run_ = false;
-  }
-
-  // We call this function to set the type of failure SetUp() should
-  // generate.
-  void set_failure_in_set_up(FailureType type) {
-    failure_in_set_up_ = type;
-  }
-
-  // Was SetUp() run?
-  bool set_up_was_run() const { return set_up_was_run_; }
-
-  // Was TearDown() run?
-  bool tear_down_was_run() const { return tear_down_was_run_; }
-
- private:
-  FailureType failure_in_set_up_;
-  bool set_up_was_run_;
-  bool tear_down_was_run_;
-};
-
-// Was the TEST run?
-bool test_was_run;
-
-// The sole purpose of this TEST is to enable us to check whether it
-// was run.
-TEST(FooTest, Bar) {
-  test_was_run = true;
-}
-
-// Prints the message and aborts the program if condition is false.
-void Check(bool condition, const char* msg) {
-  if (!condition) {
-    printf("FAILED: %s\n", msg);
-    testing::internal::posix::Abort();
-  }
-}
-
-// Runs the tests.  Return true if and only if successful.
-//
-// The 'failure' parameter specifies the type of failure that should
-// be generated by the global set-up.
-int RunAllTests(MyEnvironment* env, FailureType failure) {
-  env->Reset();
-  env->set_failure_in_set_up(failure);
-  test_was_run = false;
-  testing::internal::GetUnitTestImpl()->ClearAdHocTestResult();
-  return RUN_ALL_TESTS();
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // Registers a global test environment, and verifies that the
-  // registration function returns its argument.
-  MyEnvironment* const env = new MyEnvironment;
-  Check(testing::AddGlobalTestEnvironment(env) == env,
-        "AddGlobalTestEnvironment() should return its argument.");
-
-  // Verifies that RUN_ALL_TESTS() runs the tests when the global
-  // set-up is successful.
-  Check(RunAllTests(env, NO_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as the global tear-down "
-        "should generate a failure.");
-  Check(test_was_run,
-        "The tests should run, as the global set-up should generate no "
-        "failure");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() runs the tests when the global
-  // set-up generates no fatal failure.
-  Check(RunAllTests(env, NON_FATAL_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as both the global set-up "
-        "and the global tear-down should generate a non-fatal failure.");
-  Check(test_was_run,
-        "The tests should run, as the global set-up should generate no "
-        "fatal failure.");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() runs no test when the global set-up
-  // generates a fatal failure.
-  Check(RunAllTests(env, FATAL_FAILURE) != 0,
-        "RUN_ALL_TESTS() should return non-zero, as the global set-up "
-        "should generate a fatal failure.");
-  Check(!test_was_run,
-        "The tests should not run, as the global set-up should generate "
-        "a fatal failure.");
-  Check(env->tear_down_was_run(),
-        "The global tear-down should run, as the global set-up was run.");
-
-  // Verifies that RUN_ALL_TESTS() doesn't do global set-up or
-  // tear-down when there is no test to run.
-  testing::GTEST_FLAG(filter) = "-*";
-  Check(RunAllTests(env, NO_FAILURE) == 0,
-        "RUN_ALL_TESTS() should return zero, as there is no test to run.");
-  Check(!env->set_up_was_run(),
-        "The global set-up should not run, as there is no test to run.");
-  Check(!env->tear_down_was_run(),
-        "The global tear-down should not run, "
-        "as the global set-up was not run.");
-
-  printf("PASS\n");
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_help_test.py b/3rdparty/gtest/test/gtest_help_test.py
deleted file mode 100644
index 582d24c2..00000000
--- a/3rdparty/gtest/test/gtest_help_test.py
+++ /dev/null
@@ -1,170 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2009, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Tests the --help flag of Google C++ Testing and Mocking Framework.
-
-SYNOPSIS
-       gtest_help_test.py --build_dir=BUILD/DIR
-         # where BUILD/DIR contains the built gtest_help_test_ file.
-       gtest_help_test.py
-"""
-
-import os
-import re
-import gtest_test_utils
-
-
-IS_LINUX = os.name == 'posix' and os.uname()[0] == 'Linux'
-IS_WINDOWS = os.name == 'nt'
-
-PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath('gtest_help_test_')
-FLAG_PREFIX = '--gtest_'
-DEATH_TEST_STYLE_FLAG = FLAG_PREFIX + 'death_test_style'
-STREAM_RESULT_TO_FLAG = FLAG_PREFIX + 'stream_result_to'
-UNKNOWN_FLAG = FLAG_PREFIX + 'unknown_flag_for_testing'
-LIST_TESTS_FLAG = FLAG_PREFIX + 'list_tests'
-INCORRECT_FLAG_VARIANTS = [re.sub('^--', '-', LIST_TESTS_FLAG),
-                           re.sub('^--', '/', LIST_TESTS_FLAG),
-                           re.sub('_', '-', LIST_TESTS_FLAG)]
-INTERNAL_FLAG_FOR_TESTING = FLAG_PREFIX + 'internal_flag_for_testing'
-
-SUPPORTS_DEATH_TESTS = "DeathTest" in gtest_test_utils.Subprocess(
-    [PROGRAM_PATH, LIST_TESTS_FLAG]).output
-
-# The help message must match this regex.
-HELP_REGEX = re.compile(
-    FLAG_PREFIX + r'list_tests.*' +
-    FLAG_PREFIX + r'filter=.*' +
-    FLAG_PREFIX + r'also_run_disabled_tests.*' +
-    FLAG_PREFIX + r'repeat=.*' +
-    FLAG_PREFIX + r'shuffle.*' +
-    FLAG_PREFIX + r'random_seed=.*' +
-    FLAG_PREFIX + r'color=.*' +
-    FLAG_PREFIX + r'print_time.*' +
-    FLAG_PREFIX + r'output=.*' +
-    FLAG_PREFIX + r'break_on_failure.*' +
-    FLAG_PREFIX + r'throw_on_failure.*' +
-    FLAG_PREFIX + r'catch_exceptions=0.*',
-    re.DOTALL)
-
-
-def RunWithFlag(flag):
-  """Runs gtest_help_test_ with the given flag.
-
-  Returns:
-    the exit code and the text output as a tuple.
-  Args:
-    flag: the command-line flag to pass to gtest_help_test_, or None.
-  """
-
-  if flag is None:
-    command = [PROGRAM_PATH]
-  else:
-    command = [PROGRAM_PATH, flag]
-  child = gtest_test_utils.Subprocess(command)
-  return child.exit_code, child.output
-
-
-class GTestHelpTest(gtest_test_utils.TestCase):
-  """Tests the --help flag and its equivalent forms."""
-
-  def TestHelpFlag(self, flag):
-    """Verifies correct behavior when help flag is specified.
-
-    The right message must be printed and the tests must
-    skipped when the given flag is specified.
-
-    Args:
-      flag:  A flag to pass to the binary or None.
-    """
-
-    exit_code, output = RunWithFlag(flag)
-    self.assertEquals(0, exit_code)
-    self.assert_(HELP_REGEX.search(output), output)
-
-    if IS_LINUX:
-      self.assert_(STREAM_RESULT_TO_FLAG in output, output)
-    else:
-      self.assert_(STREAM_RESULT_TO_FLAG not in output, output)
-
-    if SUPPORTS_DEATH_TESTS and not IS_WINDOWS:
-      self.assert_(DEATH_TEST_STYLE_FLAG in output, output)
-    else:
-      self.assert_(DEATH_TEST_STYLE_FLAG not in output, output)
-
-  def TestNonHelpFlag(self, flag):
-    """Verifies correct behavior when no help flag is specified.
-
-    Verifies that when no help flag is specified, the tests are run
-    and the help message is not printed.
-
-    Args:
-      flag:  A flag to pass to the binary or None.
-    """
-
-    exit_code, output = RunWithFlag(flag)
-    self.assert_(exit_code != 0)
-    self.assert_(not HELP_REGEX.search(output), output)
-
-  def testPrintsHelpWithFullFlag(self):
-    self.TestHelpFlag('--help')
-
-  def testPrintsHelpWithShortFlag(self):
-    self.TestHelpFlag('-h')
-
-  def testPrintsHelpWithQuestionFlag(self):
-    self.TestHelpFlag('-?')
-
-  def testPrintsHelpWithWindowsStyleQuestionFlag(self):
-    self.TestHelpFlag('/?')
-
-  def testPrintsHelpWithUnrecognizedGoogleTestFlag(self):
-    self.TestHelpFlag(UNKNOWN_FLAG)
-
-  def testPrintsHelpWithIncorrectFlagStyle(self):
-    for incorrect_flag in INCORRECT_FLAG_VARIANTS:
-      self.TestHelpFlag(incorrect_flag)
-
-  def testRunsTestsWithoutHelpFlag(self):
-    """Verifies that when no help flag is specified, the tests are run
-    and the help message is not printed."""
-
-    self.TestNonHelpFlag(None)
-
-  def testRunsTestsWithGtestInternalFlag(self):
-    """Verifies that the tests are run and no help message is printed when
-    a flag starting with Google Test prefix and 'internal_' is supplied."""
-
-    self.TestNonHelpFlag(INTERNAL_FLAG_FOR_TESTING)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_help_test_.cc b/3rdparty/gtest/test/gtest_help_test_.cc
deleted file mode 100644
index 750ae6ce..00000000
--- a/3rdparty/gtest/test/gtest_help_test_.cc
+++ /dev/null
@@ -1,45 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This program is meant to be run by gtest_help_test.py.  Do not run
-// it directly.
-
-#include "gtest/gtest.h"
-
-// When a help flag is specified, this program should skip the tests
-// and exit with 0; otherwise the following test will be executed,
-// causing this program to exit with a non-zero code.
-TEST(HelpFlagTest, ShouldNotBeRun) {
-  ASSERT_TRUE(false) << "Tests shouldn't be run when --help is specified.";
-}
-
-#if GTEST_HAS_DEATH_TEST
-TEST(DeathTest, UsedByPythonScriptToDetectSupportForDeathTestsInThisBinary) {}
-#endif
diff --git a/3rdparty/gtest/test/gtest_json_test_utils.py b/3rdparty/gtest/test/gtest_json_test_utils.py
deleted file mode 100644
index 62bbfc28..00000000
--- a/3rdparty/gtest/test/gtest_json_test_utils.py
+++ /dev/null
@@ -1,60 +0,0 @@
-# Copyright 2018, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for gtest_json_output."""
-
-import re
-
-
-def normalize(obj):
-  """Normalize output object.
-
-  Args:
-     obj: Google Test's JSON output object to normalize.
-
-  Returns:
-     Normalized output without any references to transient information that may
-     change from run to run.
-  """
-  def _normalize(key, value):
-    if key == 'time':
-      return re.sub(r'^\d+(\.\d+)?s$', '*', value)
-    elif key == 'timestamp':
-      return re.sub(r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\dZ$', '*', value)
-    elif key == 'failure':
-      value = re.sub(r'^.*[/\\](.*:)\d+\n', '\\1*\n', value)
-      return re.sub(r'Stack trace:\n(.|\n)*', 'Stack trace:\n*', value)
-    else:
-      return normalize(value)
-  if isinstance(obj, dict):
-    return {k: _normalize(k, v) for k, v in obj.items()}
-  if isinstance(obj, list):
-    return [normalize(x) for x in obj]
-  else:
-    return obj
diff --git a/3rdparty/gtest/test/gtest_list_output_unittest.py b/3rdparty/gtest/test/gtest_list_output_unittest.py
deleted file mode 100644
index 3bba7ea2..00000000
--- a/3rdparty/gtest/test/gtest_list_output_unittest.py
+++ /dev/null
@@ -1,141 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Unit test for Google Test's --gtest_list_tests flag.
-
-A user can ask Google Test to list all tests by specifying the
---gtest_list_tests flag. If output is requested, via --gtest_output=xml
-or --gtest_output=json, the tests are listed, with extra information in the
-output file.
-This script tests such functionality by invoking gtest_list_output_unittest_
- (a program written with Google Test) the command line flags.
-"""
-
-import os
-import re
-import gtest_test_utils
-
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-
-EXPECTED_XML = """<\?xml version="1.0" encoding="UTF-8"\?>
-<testsuites tests="2" name="AllTests">
-  <testsuite name="FooTest" tests="2">
-    <testcase name="Test1" file=".*gtest_list_output_unittest_.cc" line="43" />
-    <testcase name="Test2" file=".*gtest_list_output_unittest_.cc" line="45" />
-  </testsuite>
-</testsuites>
-"""
-
-EXPECTED_JSON = """{
-  "tests": 2,
-  "name": "AllTests",
-  "testsuites": \[
-    {
-      "name": "FooTest",
-      "tests": 2,
-      "testsuite": \[
-        {
-          "name": "Test1",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 43
-        },
-        {
-          "name": "Test2",
-          "file": ".*gtest_list_output_unittest_.cc",
-          "line": 45
-        }
-      \]
-    }
-  \]
-}
-"""
-
-
-class GTestListTestsOutputUnitTest(gtest_test_utils.TestCase):
-  """Unit test for Google Test's list tests with output to file functionality.
-  """
-
-  def testXml(self):
-    """Verifies XML output for listing tests in a Google Test binary.
-
-    Runs a test program that generates an empty XML output, and
-    tests that the XML output is expected.
-    """
-    self._TestOutput('xml', EXPECTED_XML)
-
-  def testJSON(self):
-    """Verifies XML output for listing tests in a Google Test binary.
-
-    Runs a test program that generates an empty XML output, and
-    tests that the XML output is expected.
-    """
-    self._TestOutput('json', EXPECTED_JSON)
-
-  def _GetOutput(self, out_format):
-    file_path = os.path.join(gtest_test_utils.GetTempDir(),
-                             'test_out.' + out_format)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_list_output_unittest_')
-
-    command = ([
-        gtest_prog_path,
-        '%s=%s:%s' % (GTEST_OUTPUT_FLAG, out_format, file_path),
-        '--gtest_list_tests'
-    ])
-    environ_copy = os.environ.copy()
-    p = gtest_test_utils.Subprocess(
-        command, env=environ_copy, working_dir=gtest_test_utils.GetTempDir())
-
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-    with open(file_path) as f:
-      result = f.read()
-    return result
-
-  def _TestOutput(self, test_format, expected_output):
-    actual = self._GetOutput(test_format)
-    actual_lines = actual.splitlines()
-    expected_lines = expected_output.splitlines()
-    line_count = 0
-    for actual_line in actual_lines:
-      expected_line = expected_lines[line_count]
-      expected_line_re = re.compile(expected_line.strip())
-      self.assert_(
-          expected_line_re.match(actual_line.strip()),
-          ('actual output of "%s",\n'
-           'which does not match expected regex of "%s"\n'
-           'on line %d' % (actual, expected_output, line_count)))
-      line_count = line_count + 1
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_list_output_unittest_.cc b/3rdparty/gtest/test/gtest_list_output_unittest_.cc
deleted file mode 100644
index b1c7b4de..00000000
--- a/3rdparty/gtest/test/gtest_list_output_unittest_.cc
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2018, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Author: david.schuldenfrei@gmail.com (David Schuldenfrei)
-
-// Unit test for Google Test's --gtest_list_tests and --gtest_output flag.
-//
-// A user can ask Google Test to list all tests that will run,
-// and have the output saved in a Json/Xml file.
-// The tests will not be run after listing.
-//
-// This program will be invoked from a Python unit test.
-// Don't run it directly.
-
-#include "gtest/gtest.h"
-
-TEST(FooTest, Test1) {}
-
-TEST(FooTest, Test2) {}
-
-int main(int argc, char **argv) {
-  ::testing::InitGoogleTest(&argc, argv);
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest_main_unittest.cc b/3rdparty/gtest/test/gtest_main_unittest.cc
deleted file mode 100644
index eddedeab..00000000
--- a/3rdparty/gtest/test/gtest_main_unittest.cc
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-#include "gtest/gtest.h"
-
-// Tests that we don't have to define main() when we link to
-// gtest_main instead of gtest.
-
-namespace {
-
-TEST(GTestMainTest, ShouldSucceed) {
-}
-
-}  // namespace
-
-// We are using the main() function defined in gtest_main.cc, so we
-// don't define it here.
diff --git a/3rdparty/gtest/test/gtest_no_test_unittest.cc b/3rdparty/gtest/test/gtest_no_test_unittest.cc
deleted file mode 100644
index d4f88dbf..00000000
--- a/3rdparty/gtest/test/gtest_no_test_unittest.cc
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Tests that a Google Test program that has no test defined can run
-// successfully.
-
-#include "gtest/gtest.h"
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // An ad-hoc assertion outside of all tests.
-  //
-  // This serves three purposes:
-  //
-  // 1. It verifies that an ad-hoc assertion can be executed even if
-  //    no test is defined.
-  // 2. It verifies that a failed ad-hoc assertion causes the test
-  //    program to fail.
-  // 3. We had a bug where the XML output won't be generated if an
-  //    assertion is executed before RUN_ALL_TESTS() is called, even
-  //    though --gtest_output=xml is specified.  This makes sure the
-  //    bug is fixed and doesn't regress.
-  EXPECT_EQ(1, 2);
-
-  // The above EXPECT_EQ() should cause RUN_ALL_TESTS() to return non-zero.
-  return RUN_ALL_TESTS() ? 0 : 1;
-}
diff --git a/3rdparty/gtest/test/gtest_pred_impl_unittest.cc b/3rdparty/gtest/test/gtest_pred_impl_unittest.cc
deleted file mode 100644
index 1afe5e2d..00000000
--- a/3rdparty/gtest/test/gtest_pred_impl_unittest.cc
+++ /dev/null
@@ -1,2427 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// This file is AUTOMATICALLY GENERATED on 01/02/2019 by command
-// 'gen_gtest_pred_impl.py 5'.  DO NOT EDIT BY HAND!
-
-// Regression test for gtest_pred_impl.h
-//
-// This file is generated by a script and quite long.  If you intend to
-// learn how Google Test works by reading its unit tests, read
-// gtest_unittest.cc instead.
-//
-// This is intended as a regression test for the Google Test predicate
-// assertions.  We compile it as part of the gtest_unittest target
-// only to keep the implementation tidy and compact, as it is quite
-// involved to set up the stage for testing Google Test using Google
-// Test itself.
-//
-// Currently, gtest_unittest takes ~11 seconds to run in the testing
-// daemon.  In the future, if it grows too large and needs much more
-// time to finish, we should consider separating this file into a
-// stand-alone regression test.
-
-#include <iostream>
-
-#include "gtest/gtest.h"
-#include "gtest/gtest-spi.h"
-
-// A user-defined data type.
-struct Bool {
-  explicit Bool(int val) : value(val != 0) {}
-
-  bool operator>(int n) const { return value > Bool(n).value; }
-
-  Bool operator+(const Bool& rhs) const { return Bool(value + rhs.value); }
-
-  bool operator==(const Bool& rhs) const { return value == rhs.value; }
-
-  bool value;
-};
-
-// Enables Bool to be used in assertions.
-std::ostream& operator<<(std::ostream& os, const Bool& x) {
-  return os << (x.value ? "true" : "false");
-}
-
-// Sample functions/functors for testing unary predicate assertions.
-
-// A unary predicate function.
-template <typename T1>
-bool PredFunction1(T1 v1) {
-  return v1 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction1Int(int v1) {
-  return v1 > 0;
-}
-bool PredFunction1Bool(Bool v1) {
-  return v1 > 0;
-}
-
-// A unary predicate functor.
-struct PredFunctor1 {
-  template <typename T1>
-  bool operator()(const T1& v1) {
-    return v1 > 0;
-  }
-};
-
-// A unary predicate-formatter function.
-template <typename T1>
-testing::AssertionResult PredFormatFunction1(const char* e1,
-                                             const T1& v1) {
-  if (PredFunction1(v1))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1
-      << " is expected to be positive, but evaluates to "
-      << v1 << ".";
-}
-
-// A unary predicate-formatter functor.
-struct PredFormatFunctor1 {
-  template <typename T1>
-  testing::AssertionResult operator()(const char* e1,
-                                      const T1& v1) const {
-    return PredFormatFunction1(e1, v1);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT1.
-
-class Predicate1Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-};
-
-bool Predicate1Test::expected_to_finish_;
-bool Predicate1Test::finished_;
-int Predicate1Test::n1_;
-
-typedef Predicate1Test EXPECT_PRED_FORMAT1Test;
-typedef Predicate1Test ASSERT_PRED_FORMAT1Test;
-typedef Predicate1Test EXPECT_PRED1Test;
-typedef Predicate1Test ASSERT_PRED1Test;
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED1(PredFunction1Int,
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED1(PredFunction1Bool,
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED1(PredFunctor1(),
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED1(PredFunctor1(),
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunction1Int,
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunction1Bool,
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED1Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunctor1(),
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED1Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(PredFunctor1(),
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED1(PredFunction1Int,
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED1(PredFunction1Bool,
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED1(PredFunctor1(),
-               ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED1(PredFunctor1(),
-               Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunction1Int,
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunction1Bool,
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED1Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunctor1(),
-                 n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED1Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED1(PredFunctor1(),
-                 Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunction1,
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT1Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT1(PredFormatFunctor1(),
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                      ++n1_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                      Bool(++n1_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunction1,
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                        n1_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT1 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT1Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(PredFormatFunctor1(),
-                        Bool(n1_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing binary predicate assertions.
-
-// A binary predicate function.
-template <typename T1, typename T2>
-bool PredFunction2(T1 v1, T2 v2) {
-  return v1 + v2 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction2Int(int v1, int v2) {
-  return v1 + v2 > 0;
-}
-bool PredFunction2Bool(Bool v1, Bool v2) {
-  return v1 + v2 > 0;
-}
-
-// A binary predicate functor.
-struct PredFunctor2 {
-  template <typename T1, typename T2>
-  bool operator()(const T1& v1,
-                  const T2& v2) {
-    return v1 + v2 > 0;
-  }
-};
-
-// A binary predicate-formatter function.
-template <typename T1, typename T2>
-testing::AssertionResult PredFormatFunction2(const char* e1,
-                                             const char* e2,
-                                             const T1& v1,
-                                             const T2& v2) {
-  if (PredFunction2(v1, v2))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 << ".";
-}
-
-// A binary predicate-formatter functor.
-struct PredFormatFunctor2 {
-  template <typename T1, typename T2>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const T1& v1,
-                                      const T2& v2) const {
-    return PredFormatFunction2(e1, e2, v1, v2);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT2.
-
-class Predicate2Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-};
-
-bool Predicate2Test::expected_to_finish_;
-bool Predicate2Test::finished_;
-int Predicate2Test::n1_;
-int Predicate2Test::n2_;
-
-typedef Predicate2Test EXPECT_PRED_FORMAT2Test;
-typedef Predicate2Test ASSERT_PRED_FORMAT2Test;
-typedef Predicate2Test EXPECT_PRED2Test;
-typedef Predicate2Test ASSERT_PRED2Test;
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED2(PredFunction2Int,
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED2(PredFunction2Bool,
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED2(PredFunctor2(),
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED2(PredFunctor2(),
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunction2Int,
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunction2Bool,
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED2Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunctor2(),
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED2Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(PredFunctor2(),
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED2(PredFunction2Int,
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED2(PredFunction2Bool,
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED2(PredFunctor2(),
-               ++n1_,
-               ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED2(PredFunctor2(),
-               Bool(++n1_),
-               Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunction2Int,
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunction2Bool,
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED2Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunctor2(),
-                 n1_++,
-                 n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED2Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED2(PredFunctor2(),
-                 Bool(n1_++),
-                 Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunction2,
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT2Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(PredFormatFunctor2(),
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                      ++n1_,
-                      ++n2_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                      Bool(++n1_),
-                      Bool(++n2_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunction2,
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                        n1_++,
-                        n2_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT2 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT2Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(PredFormatFunctor2(),
-                        Bool(n1_++),
-                        Bool(n2_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing ternary predicate assertions.
-
-// A ternary predicate function.
-template <typename T1, typename T2, typename T3>
-bool PredFunction3(T1 v1, T2 v2, T3 v3) {
-  return v1 + v2 + v3 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction3Int(int v1, int v2, int v3) {
-  return v1 + v2 + v3 > 0;
-}
-bool PredFunction3Bool(Bool v1, Bool v2, Bool v3) {
-  return v1 + v2 + v3 > 0;
-}
-
-// A ternary predicate functor.
-struct PredFunctor3 {
-  template <typename T1, typename T2, typename T3>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3) {
-    return v1 + v2 + v3 > 0;
-  }
-};
-
-// A ternary predicate-formatter function.
-template <typename T1, typename T2, typename T3>
-testing::AssertionResult PredFormatFunction3(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3) {
-  if (PredFunction3(v1, v2, v3))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 << ".";
-}
-
-// A ternary predicate-formatter functor.
-struct PredFormatFunctor3 {
-  template <typename T1, typename T2, typename T3>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3) const {
-    return PredFormatFunction3(e1, e2, e3, v1, v2, v3);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT3.
-
-class Predicate3Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-};
-
-bool Predicate3Test::expected_to_finish_;
-bool Predicate3Test::finished_;
-int Predicate3Test::n1_;
-int Predicate3Test::n2_;
-int Predicate3Test::n3_;
-
-typedef Predicate3Test EXPECT_PRED_FORMAT3Test;
-typedef Predicate3Test ASSERT_PRED_FORMAT3Test;
-typedef Predicate3Test EXPECT_PRED3Test;
-typedef Predicate3Test ASSERT_PRED3Test;
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED3(PredFunction3Int,
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED3(PredFunction3Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED3(PredFunctor3(),
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED3(PredFunctor3(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunction3Int,
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunction3Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED3Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunctor3(),
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED3Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(PredFunctor3(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED3(PredFunction3Int,
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED3(PredFunction3Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED3(PredFunctor3(),
-               ++n1_,
-               ++n2_,
-               ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED3(PredFunctor3(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunction3Int,
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunction3Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED3Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunctor3(),
-                 n1_++,
-                 n2_++,
-                 n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED3Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(PredFunctor3(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunction3,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT3Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT3(PredFormatFunctor3(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunction3,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                        n1_++,
-                        n2_++,
-                        n3_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT3 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT3Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT3(PredFormatFunctor3(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing 4-ary predicate assertions.
-
-// A 4-ary predicate function.
-template <typename T1, typename T2, typename T3, typename T4>
-bool PredFunction4(T1 v1, T2 v2, T3 v3, T4 v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction4Int(int v1, int v2, int v3, int v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-bool PredFunction4Bool(Bool v1, Bool v2, Bool v3, Bool v4) {
-  return v1 + v2 + v3 + v4 > 0;
-}
-
-// A 4-ary predicate functor.
-struct PredFunctor4 {
-  template <typename T1, typename T2, typename T3, typename T4>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3,
-                  const T4& v4) {
-    return v1 + v2 + v3 + v4 > 0;
-  }
-};
-
-// A 4-ary predicate-formatter function.
-template <typename T1, typename T2, typename T3, typename T4>
-testing::AssertionResult PredFormatFunction4(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const char* e4,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3,
-                                             const T4& v4) {
-  if (PredFunction4(v1, v2, v3, v4))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3 << " + " << e4
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 + v4 << ".";
-}
-
-// A 4-ary predicate-formatter functor.
-struct PredFormatFunctor4 {
-  template <typename T1, typename T2, typename T3, typename T4>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const char* e4,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3,
-                                      const T4& v4) const {
-    return PredFormatFunction4(e1, e2, e3, e4, v1, v2, v3, v4);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT4.
-
-class Predicate4Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = n4_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-    EXPECT_EQ(1, n4_) <<
-        "The predicate assertion didn't evaluate argument 5 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-  static int n4_;
-};
-
-bool Predicate4Test::expected_to_finish_;
-bool Predicate4Test::finished_;
-int Predicate4Test::n1_;
-int Predicate4Test::n2_;
-int Predicate4Test::n3_;
-int Predicate4Test::n4_;
-
-typedef Predicate4Test EXPECT_PRED_FORMAT4Test;
-typedef Predicate4Test ASSERT_PRED_FORMAT4Test;
-typedef Predicate4Test EXPECT_PRED4Test;
-typedef Predicate4Test ASSERT_PRED4Test;
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED4(PredFunction4Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED4(PredFunction4Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED4(PredFunctor4(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED4(PredFunctor4(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunction4Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunction4Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED4Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunctor4(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED4Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED4(PredFunctor4(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED4(PredFunction4Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED4(PredFunction4Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED4(PredFunctor4(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED4(PredFunctor4(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunction4Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunction4Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED4Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunctor4(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED4Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED4(PredFunctor4(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunction4,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT4Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(PredFormatFunctor4(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunction4,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT4 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT4Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT4(PredFormatFunctor4(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++));
-    finished_ = true;
-  }, "");
-}
-// Sample functions/functors for testing 5-ary predicate assertions.
-
-// A 5-ary predicate function.
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-bool PredFunction5(T1 v1, T2 v2, T3 v3, T4 v4, T5 v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-
-// The following two functions are needed to circumvent a bug in
-// gcc 2.95.3, which sometimes has problem with the above template
-// function.
-bool PredFunction5Int(int v1, int v2, int v3, int v4, int v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-bool PredFunction5Bool(Bool v1, Bool v2, Bool v3, Bool v4, Bool v5) {
-  return v1 + v2 + v3 + v4 + v5 > 0;
-}
-
-// A 5-ary predicate functor.
-struct PredFunctor5 {
-  template <typename T1, typename T2, typename T3, typename T4, typename T5>
-  bool operator()(const T1& v1,
-                  const T2& v2,
-                  const T3& v3,
-                  const T4& v4,
-                  const T5& v5) {
-    return v1 + v2 + v3 + v4 + v5 > 0;
-  }
-};
-
-// A 5-ary predicate-formatter function.
-template <typename T1, typename T2, typename T3, typename T4, typename T5>
-testing::AssertionResult PredFormatFunction5(const char* e1,
-                                             const char* e2,
-                                             const char* e3,
-                                             const char* e4,
-                                             const char* e5,
-                                             const T1& v1,
-                                             const T2& v2,
-                                             const T3& v3,
-                                             const T4& v4,
-                                             const T5& v5) {
-  if (PredFunction5(v1, v2, v3, v4, v5))
-    return testing::AssertionSuccess();
-
-  return testing::AssertionFailure()
-      << e1 << " + " << e2 << " + " << e3 << " + " << e4 << " + " << e5
-      << " is expected to be positive, but evaluates to "
-      << v1 + v2 + v3 + v4 + v5 << ".";
-}
-
-// A 5-ary predicate-formatter functor.
-struct PredFormatFunctor5 {
-  template <typename T1, typename T2, typename T3, typename T4, typename T5>
-  testing::AssertionResult operator()(const char* e1,
-                                      const char* e2,
-                                      const char* e3,
-                                      const char* e4,
-                                      const char* e5,
-                                      const T1& v1,
-                                      const T2& v2,
-                                      const T3& v3,
-                                      const T4& v4,
-                                      const T5& v5) const {
-    return PredFormatFunction5(e1, e2, e3, e4, e5, v1, v2, v3, v4, v5);
-  }
-};
-
-// Tests for {EXPECT|ASSERT}_PRED_FORMAT5.
-
-class Predicate5Test : public testing::Test {
- protected:
-  void SetUp() override {
-    expected_to_finish_ = true;
-    finished_ = false;
-    n1_ = n2_ = n3_ = n4_ = n5_ = 0;
-  }
-
-  void TearDown() override {
-    // Verifies that each of the predicate's arguments was evaluated
-    // exactly once.
-    EXPECT_EQ(1, n1_) <<
-        "The predicate assertion didn't evaluate argument 2 "
-        "exactly once.";
-    EXPECT_EQ(1, n2_) <<
-        "The predicate assertion didn't evaluate argument 3 "
-        "exactly once.";
-    EXPECT_EQ(1, n3_) <<
-        "The predicate assertion didn't evaluate argument 4 "
-        "exactly once.";
-    EXPECT_EQ(1, n4_) <<
-        "The predicate assertion didn't evaluate argument 5 "
-        "exactly once.";
-    EXPECT_EQ(1, n5_) <<
-        "The predicate assertion didn't evaluate argument 6 "
-        "exactly once.";
-
-    // Verifies that the control flow in the test function is expected.
-    if (expected_to_finish_ && !finished_) {
-      FAIL() << "The predicate assertion unexpactedly aborted the test.";
-    } else if (!expected_to_finish_ && finished_) {
-      FAIL() << "The failed predicate assertion didn't abort the test "
-                "as expected.";
-    }
-  }
-
-  // true if and only if the test function is expected to run to finish.
-  static bool expected_to_finish_;
-
-  // true if and only if the test function did run to finish.
-  static bool finished_;
-
-  static int n1_;
-  static int n2_;
-  static int n3_;
-  static int n4_;
-  static int n5_;
-};
-
-bool Predicate5Test::expected_to_finish_;
-bool Predicate5Test::finished_;
-int Predicate5Test::n1_;
-int Predicate5Test::n2_;
-int Predicate5Test::n3_;
-int Predicate5Test::n4_;
-int Predicate5Test::n5_;
-
-typedef Predicate5Test EXPECT_PRED_FORMAT5Test;
-typedef Predicate5Test ASSERT_PRED_FORMAT5Test;
-typedef Predicate5Test EXPECT_PRED5Test;
-typedef Predicate5Test ASSERT_PRED5Test;
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED5(PredFunction5Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED5(PredFunction5Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED5(PredFunctor5(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED5(PredFunctor5(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunction5Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunction5Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED5Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunctor5(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED5Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED5(PredFunctor5(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED5(PredFunction5Int,
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED5(PredFunction5Bool,
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED5(PredFunctor5(),
-               ++n1_,
-               ++n2_,
-               ++n3_,
-               ++n4_,
-               ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED5(PredFunctor5(),
-               Bool(++n1_),
-               Bool(++n2_),
-               Bool(++n3_),
-               Bool(++n4_),
-               Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunction5Int,
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunction5Bool,
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED5Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunctor5(),
-                 n1_++,
-                 n2_++,
-                 n3_++,
-                 n4_++,
-                 n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED5Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED5(PredFunctor5(),
-                 Bool(n1_++),
-                 Bool(n2_++),
-                 Bool(n3_++),
-                 Bool(n4_++),
-                 Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnBuiltInTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnUserTypeSuccess) {
-  EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctionOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunction5,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnBuiltInTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed EXPECT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(EXPECT_PRED_FORMAT5Test, FunctorOnUserTypeFailure) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT5(PredFormatFunctor5(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnBuiltInTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                      ++n1_,
-                      ++n2_,
-                      ++n3_,
-                      ++n4_,
-                      ++n5_);
-  finished_ = true;
-}
-
-// Tests a successful ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnUserTypeSuccess) {
-  ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                      Bool(++n1_),
-                      Bool(++n2_),
-                      Bool(++n3_),
-                      Bool(++n4_),
-                      Bool(++n5_));
-  finished_ = true;
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a function on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctionOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunction5,
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a built-in type (int).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnBuiltInTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                        n1_++,
-                        n2_++,
-                        n3_++,
-                        n4_++,
-                        n5_++);
-    finished_ = true;
-  }, "");
-}
-
-// Tests a failed ASSERT_PRED_FORMAT5 where the
-// predicate-formatter is a functor on a user-defined type (Bool).
-TEST_F(ASSERT_PRED_FORMAT5Test, FunctorOnUserTypeFailure) {
-  expected_to_finish_ = false;
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(PredFormatFunctor5(),
-                        Bool(n1_++),
-                        Bool(n2_++),
-                        Bool(n3_++),
-                        Bool(n4_++),
-                        Bool(n5_++));
-    finished_ = true;
-  }, "");
-}
diff --git a/3rdparty/gtest/test/gtest_premature_exit_test.cc b/3rdparty/gtest/test/gtest_premature_exit_test.cc
deleted file mode 100644
index 1d1187ef..00000000
--- a/3rdparty/gtest/test/gtest_premature_exit_test.cc
+++ /dev/null
@@ -1,126 +0,0 @@
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests that Google Test manipulates the premature-exit-detection
-// file correctly.
-
-#include <stdio.h>
-
-#include "gtest/gtest.h"
-
-using ::testing::InitGoogleTest;
-using ::testing::Test;
-using ::testing::internal::posix::GetEnv;
-using ::testing::internal::posix::Stat;
-using ::testing::internal::posix::StatStruct;
-
-namespace {
-
-class PrematureExitTest : public Test {
- public:
-  // Returns true if and only if the given file exists.
-  static bool FileExists(const char* filepath) {
-    StatStruct stat;
-    return Stat(filepath, &stat) == 0;
-  }
-
- protected:
-  PrematureExitTest() {
-    premature_exit_file_path_ = GetEnv("TEST_PREMATURE_EXIT_FILE");
-
-    // Normalize NULL to "" for ease of handling.
-    if (premature_exit_file_path_ == nullptr) {
-      premature_exit_file_path_ = "";
-    }
-  }
-
-  // Returns true if and only if the premature-exit file exists.
-  bool PrematureExitFileExists() const {
-    return FileExists(premature_exit_file_path_);
-  }
-
-  const char* premature_exit_file_path_;
-};
-
-typedef PrematureExitTest PrematureExitDeathTest;
-
-// Tests that:
-//   - the premature-exit file exists during the execution of a
-//     death test (EXPECT_DEATH*), and
-//   - a death test doesn't interfere with the main test process's
-//     handling of the premature-exit file.
-TEST_F(PrematureExitDeathTest, FileExistsDuringExecutionOfDeathTest) {
-  if (*premature_exit_file_path_ == '\0') {
-    return;
-  }
-
-  EXPECT_DEATH_IF_SUPPORTED({
-      // If the file exists, crash the process such that the main test
-      // process will catch the (expected) crash and report a success;
-      // otherwise don't crash, which will cause the main test process
-      // to report that the death test has failed.
-      if (PrematureExitFileExists()) {
-        exit(1);
-      }
-    }, "");
-}
-
-// Tests that the premature-exit file exists during the execution of a
-// normal (non-death) test.
-TEST_F(PrematureExitTest, PrematureExitFileExistsDuringTestExecution) {
-  if (*premature_exit_file_path_ == '\0') {
-    return;
-  }
-
-  EXPECT_TRUE(PrematureExitFileExists())
-      << " file " << premature_exit_file_path_
-      << " should exist during test execution, but doesn't.";
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  InitGoogleTest(&argc, argv);
-  const int exit_code = RUN_ALL_TESTS();
-
-  // Test that the premature-exit file is deleted upon return from
-  // RUN_ALL_TESTS().
-  const char* const filepath = GetEnv("TEST_PREMATURE_EXIT_FILE");
-  if (filepath != nullptr && *filepath != '\0') {
-    if (PrematureExitTest::FileExists(filepath)) {
-      printf(
-          "File %s shouldn't exist after the test program finishes, but does.",
-          filepath);
-      return 1;
-    }
-  }
-
-  return exit_code;
-}
diff --git a/3rdparty/gtest/test/gtest_prod_test.cc b/3rdparty/gtest/test/gtest_prod_test.cc
deleted file mode 100644
index ede81a0d..00000000
--- a/3rdparty/gtest/test/gtest_prod_test.cc
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Unit test for gtest_prod.h.
-
-#include "production.h"
-#include "gtest/gtest.h"
-
-// Tests that private members can be accessed from a TEST declared as
-// a friend of the class.
-TEST(PrivateCodeTest, CanAccessPrivateMembers) {
-  PrivateCode a;
-  EXPECT_EQ(0, a.x_);
-
-  a.set_x(1);
-  EXPECT_EQ(1, a.x_);
-}
-
-typedef testing::Test PrivateCodeFixtureTest;
-
-// Tests that private members can be accessed from a TEST_F declared
-// as a friend of the class.
-TEST_F(PrivateCodeFixtureTest, CanAccessPrivateMembers) {
-  PrivateCode a;
-  EXPECT_EQ(0, a.x_);
-
-  a.set_x(2);
-  EXPECT_EQ(2, a.x_);
-}
diff --git a/3rdparty/gtest/test/gtest_repeat_test.cc b/3rdparty/gtest/test/gtest_repeat_test.cc
deleted file mode 100644
index 7da4a15e..00000000
--- a/3rdparty/gtest/test/gtest_repeat_test.cc
+++ /dev/null
@@ -1,233 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests the --gtest_repeat=number flag.
-
-#include <stdlib.h>
-#include <iostream>
-#include "gtest/gtest.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-
-GTEST_DECLARE_string_(death_test_style);
-GTEST_DECLARE_string_(filter);
-GTEST_DECLARE_int32_(repeat);
-
-}  // namespace testing
-
-using testing::GTEST_FLAG(death_test_style);
-using testing::GTEST_FLAG(filter);
-using testing::GTEST_FLAG(repeat);
-
-namespace {
-
-// We need this when we are testing Google Test itself and therefore
-// cannot use Google Test assertions.
-#define GTEST_CHECK_INT_EQ_(expected, actual) \
-  do {\
-    const int expected_val = (expected);\
-    const int actual_val = (actual);\
-    if (::testing::internal::IsTrue(expected_val != actual_val)) {\
-      ::std::cout << "Value of: " #actual "\n"\
-                  << "  Actual: " << actual_val << "\n"\
-                  << "Expected: " #expected "\n"\
-                  << "Which is: " << expected_val << "\n";\
-      ::testing::internal::posix::Abort();\
-    }\
-  } while (::testing::internal::AlwaysFalse())
-
-
-// Used for verifying that global environment set-up and tear-down are
-// inside the --gtest_repeat loop.
-
-int g_environment_set_up_count = 0;
-int g_environment_tear_down_count = 0;
-
-class MyEnvironment : public testing::Environment {
- public:
-  MyEnvironment() {}
-  void SetUp() override { g_environment_set_up_count++; }
-  void TearDown() override { g_environment_tear_down_count++; }
-};
-
-// A test that should fail.
-
-int g_should_fail_count = 0;
-
-TEST(FooTest, ShouldFail) {
-  g_should_fail_count++;
-  EXPECT_EQ(0, 1) << "Expected failure.";
-}
-
-// A test that should pass.
-
-int g_should_pass_count = 0;
-
-TEST(FooTest, ShouldPass) {
-  g_should_pass_count++;
-}
-
-// A test that contains a thread-safe death test and a fast death
-// test.  It should pass.
-
-int g_death_test_count = 0;
-
-TEST(BarDeathTest, ThreadSafeAndFast) {
-  g_death_test_count++;
-
-  GTEST_FLAG(death_test_style) = "threadsafe";
-  EXPECT_DEATH_IF_SUPPORTED(::testing::internal::posix::Abort(), "");
-
-  GTEST_FLAG(death_test_style) = "fast";
-  EXPECT_DEATH_IF_SUPPORTED(::testing::internal::posix::Abort(), "");
-}
-
-int g_param_test_count = 0;
-
-const int kNumberOfParamTests = 10;
-
-class MyParamTest : public testing::TestWithParam<int> {};
-
-TEST_P(MyParamTest, ShouldPass) {
-  GTEST_CHECK_INT_EQ_(g_param_test_count % kNumberOfParamTests, GetParam());
-  g_param_test_count++;
-}
-INSTANTIATE_TEST_SUITE_P(MyParamSequence,
-                         MyParamTest,
-                         testing::Range(0, kNumberOfParamTests));
-
-// Resets the count for each test.
-void ResetCounts() {
-  g_environment_set_up_count = 0;
-  g_environment_tear_down_count = 0;
-  g_should_fail_count = 0;
-  g_should_pass_count = 0;
-  g_death_test_count = 0;
-  g_param_test_count = 0;
-}
-
-// Checks that the count for each test is expected.
-void CheckCounts(int expected) {
-  GTEST_CHECK_INT_EQ_(expected, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(expected, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(expected, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(expected, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(expected, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(expected * kNumberOfParamTests, g_param_test_count);
-}
-
-// Tests the behavior of Google Test when --gtest_repeat is not specified.
-void TestRepeatUnspecified() {
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(1, RUN_ALL_TESTS());
-  CheckCounts(1);
-}
-
-// Tests the behavior of Google Test when --gtest_repeat has the given value.
-void TestRepeat(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(repeat > 0 ? 1 : 0, RUN_ALL_TESTS());
-  CheckCounts(repeat);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies an empty
-// set of tests.
-void TestRepeatWithEmptyFilter(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "None";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(0, RUN_ALL_TESTS());
-  CheckCounts(0);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies a set of
-// successful tests.
-void TestRepeatWithFilterForSuccessfulTests(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "*-*ShouldFail";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(0, RUN_ALL_TESTS());
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(0, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(repeat * kNumberOfParamTests, g_param_test_count);
-}
-
-// Tests using --gtest_repeat when --gtest_filter specifies a set of
-// failed tests.
-void TestRepeatWithFilterForFailedTests(int repeat) {
-  GTEST_FLAG(repeat) = repeat;
-  GTEST_FLAG(filter) = "*ShouldFail";
-
-  ResetCounts();
-  GTEST_CHECK_INT_EQ_(1, RUN_ALL_TESTS());
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_set_up_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_environment_tear_down_count);
-  GTEST_CHECK_INT_EQ_(repeat, g_should_fail_count);
-  GTEST_CHECK_INT_EQ_(0, g_should_pass_count);
-  GTEST_CHECK_INT_EQ_(0, g_death_test_count);
-  GTEST_CHECK_INT_EQ_(0, g_param_test_count);
-}
-
-}  // namespace
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  testing::AddGlobalTestEnvironment(new MyEnvironment);
-
-  TestRepeatUnspecified();
-  TestRepeat(0);
-  TestRepeat(1);
-  TestRepeat(5);
-
-  TestRepeatWithEmptyFilter(2);
-  TestRepeatWithEmptyFilter(3);
-
-  TestRepeatWithFilterForSuccessfulTests(3);
-
-  TestRepeatWithFilterForFailedTests(4);
-
-  // It would be nice to verify that the tests indeed loop forever
-  // when GTEST_FLAG(repeat) is negative, but this test will be quite
-  // complicated to write.  Since this flag is for interactive
-  // debugging only and doesn't affect the normal test result, such a
-  // test would be an overkill.
-
-  printf("PASS\n");
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_skip_environment_check_output_test.py b/3rdparty/gtest/test/gtest_skip_environment_check_output_test.py
deleted file mode 100644
index 6e791556..00000000
--- a/3rdparty/gtest/test/gtest_skip_environment_check_output_test.py
+++ /dev/null
@@ -1,54 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2019 Google LLC.  All Rights Reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Tests Google Test's gtest skip in environment setup  behavior.
-
-This script invokes gtest_skip_in_environment_setup_test_ and verifies its
-output.
-"""
-
-import gtest_test_utils
-
-# Path to the gtest_skip_in_environment_setup_test binary
-EXE_PATH = gtest_test_utils.GetTestExecutablePath(
-    'gtest_skip_in_environment_setup_test')
-
-OUTPUT = gtest_test_utils.Subprocess([EXE_PATH]).output
-
-
-# Test.
-class SkipEntireEnvironmentTest(gtest_test_utils.TestCase):
-
-  def testSkipEntireEnvironmentTest(self):
-    self.assertIn('Skipping the entire environment', OUTPUT)
-    self.assertNotIn('FAILED', OUTPUT)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_skip_in_environment_setup_test.cc b/3rdparty/gtest/test/gtest_skip_in_environment_setup_test.cc
deleted file mode 100644
index 93723106..00000000
--- a/3rdparty/gtest/test/gtest_skip_in_environment_setup_test.cc
+++ /dev/null
@@ -1,49 +0,0 @@
-// Copyright 2019, Google LLC.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google LLC. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// This test verifies that skipping in the environment results in the
-// testcases being skipped.
-
-#include <iostream>
-#include "gtest/gtest.h"
-
-class SetupEnvironment : public testing::Environment {
- public:
-  void SetUp() override { GTEST_SKIP() << "Skipping the entire environment"; }
-};
-
-TEST(Test, AlwaysFails) { EXPECT_EQ(true, false); }
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  testing::AddGlobalTestEnvironment(new SetupEnvironment());
-
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest_skip_test.cc b/3rdparty/gtest/test/gtest_skip_test.cc
deleted file mode 100644
index 717e105e..00000000
--- a/3rdparty/gtest/test/gtest_skip_test.cc
+++ /dev/null
@@ -1,55 +0,0 @@
-// Copyright 2008 Google Inc.
-// All Rights Reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Author: arseny.aprelev@gmail.com (Arseny Aprelev)
-//
-
-#include "gtest/gtest.h"
-
-using ::testing::Test;
-
-TEST(SkipTest, DoesSkip) {
-  GTEST_SKIP();
-  EXPECT_EQ(0, 1);
-}
-
-class Fixture : public Test {
- protected:
-  void SetUp() override {
-    GTEST_SKIP() << "skipping all tests for this fixture";
-  }
-};
-
-TEST_F(Fixture, SkipsOneTest) {
-  EXPECT_EQ(5, 7);
-}
-
-TEST_F(Fixture, SkipsAnotherTest) {
-  EXPECT_EQ(99, 100);
-}
diff --git a/3rdparty/gtest/test/gtest_sole_header_test.cc b/3rdparty/gtest/test/gtest_sole_header_test.cc
deleted file mode 100644
index 1d94ac6b..00000000
--- a/3rdparty/gtest/test/gtest_sole_header_test.cc
+++ /dev/null
@@ -1,56 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This test verifies that it's possible to use Google Test by including
-// the gtest.h header file alone.
-
-#include "gtest/gtest.h"
-
-namespace {
-
-void Subroutine() {
-  EXPECT_EQ(42, 42);
-}
-
-TEST(NoFatalFailureTest, ExpectNoFatalFailure) {
-  EXPECT_NO_FATAL_FAILURE(;);
-  EXPECT_NO_FATAL_FAILURE(SUCCEED());
-  EXPECT_NO_FATAL_FAILURE(Subroutine());
-  EXPECT_NO_FATAL_FAILURE({ SUCCEED(); });
-}
-
-TEST(NoFatalFailureTest, AssertNoFatalFailure) {
-  ASSERT_NO_FATAL_FAILURE(;);
-  ASSERT_NO_FATAL_FAILURE(SUCCEED());
-  ASSERT_NO_FATAL_FAILURE(Subroutine());
-  ASSERT_NO_FATAL_FAILURE({ SUCCEED(); });
-}
-
-}  // namespace
diff --git a/3rdparty/gtest/test/gtest_stress_test.cc b/3rdparty/gtest/test/gtest_stress_test.cc
deleted file mode 100644
index 84348191..00000000
--- a/3rdparty/gtest/test/gtest_stress_test.cc
+++ /dev/null
@@ -1,248 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests that SCOPED_TRACE() and various Google Test assertions can be
-// used in a large number of threads concurrently.
-
-#include "gtest/gtest.h"
-
-#include <vector>
-
-#include "src/gtest-internal-inl.h"
-
-#if GTEST_IS_THREADSAFE
-
-namespace testing {
-namespace {
-
-using internal::Notification;
-using internal::TestPropertyKeyIs;
-using internal::ThreadWithParam;
-
-// In order to run tests in this file, for platforms where Google Test is
-// thread safe, implement ThreadWithParam. See the description of its API
-// in gtest-port.h, where it is defined for already supported platforms.
-
-// How many threads to create?
-const int kThreadCount = 50;
-
-std::string IdToKey(int id, const char* suffix) {
-  Message key;
-  key << "key_" << id << "_" << suffix;
-  return key.GetString();
-}
-
-std::string IdToString(int id) {
-  Message id_message;
-  id_message << id;
-  return id_message.GetString();
-}
-
-void ExpectKeyAndValueWereRecordedForId(
-    const std::vector<TestProperty>& properties,
-    int id, const char* suffix) {
-  TestPropertyKeyIs matches_key(IdToKey(id, suffix).c_str());
-  const std::vector<TestProperty>::const_iterator property =
-      std::find_if(properties.begin(), properties.end(), matches_key);
-  ASSERT_TRUE(property != properties.end())
-      << "expecting " << suffix << " value for id " << id;
-  EXPECT_STREQ(IdToString(id).c_str(), property->value());
-}
-
-// Calls a large number of Google Test assertions, where exactly one of them
-// will fail.
-void ManyAsserts(int id) {
-  GTEST_LOG_(INFO) << "Thread #" << id << " running...";
-
-  SCOPED_TRACE(Message() << "Thread #" << id);
-
-  for (int i = 0; i < kThreadCount; i++) {
-    SCOPED_TRACE(Message() << "Iteration #" << i);
-
-    // A bunch of assertions that should succeed.
-    EXPECT_TRUE(true);
-    ASSERT_FALSE(false) << "This shouldn't fail.";
-    EXPECT_STREQ("a", "a");
-    ASSERT_LE(5, 6);
-    EXPECT_EQ(i, i) << "This shouldn't fail.";
-
-    // RecordProperty() should interact safely with other threads as well.
-    // The shared_key forces property updates.
-    Test::RecordProperty(IdToKey(id, "string").c_str(), IdToString(id).c_str());
-    Test::RecordProperty(IdToKey(id, "int").c_str(), id);
-    Test::RecordProperty("shared_key", IdToString(id).c_str());
-
-    // This assertion should fail kThreadCount times per thread.  It
-    // is for testing whether Google Test can handle failed assertions in a
-    // multi-threaded context.
-    EXPECT_LT(i, 0) << "This should always fail.";
-  }
-}
-
-void CheckTestFailureCount(int expected_failures) {
-  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
-  const TestResult* const result = info->result();
-  GTEST_CHECK_(expected_failures == result->total_part_count())
-      << "Logged " << result->total_part_count() << " failures "
-      << " vs. " << expected_failures << " expected";
-}
-
-// Tests using SCOPED_TRACE() and Google Test assertions in many threads
-// concurrently.
-TEST(StressTest, CanUseScopedTraceAndAssertionsInManyThreads) {
-  {
-    std::unique_ptr<ThreadWithParam<int> > threads[kThreadCount];
-    Notification threads_can_start;
-    for (int i = 0; i != kThreadCount; i++)
-      threads[i].reset(new ThreadWithParam<int>(&ManyAsserts,
-                                                i,
-                                                &threads_can_start));
-
-    threads_can_start.Notify();
-
-    // Blocks until all the threads are done.
-    for (int i = 0; i != kThreadCount; i++)
-      threads[i]->Join();
-  }
-
-  // Ensures that kThreadCount*kThreadCount failures have been reported.
-  const TestInfo* const info = UnitTest::GetInstance()->current_test_info();
-  const TestResult* const result = info->result();
-
-  std::vector<TestProperty> properties;
-  // We have no access to the TestResult's list of properties but we can
-  // copy them one by one.
-  for (int i = 0; i < result->test_property_count(); ++i)
-    properties.push_back(result->GetTestProperty(i));
-
-  EXPECT_EQ(kThreadCount * 2 + 1, result->test_property_count())
-      << "String and int values recorded on each thread, "
-      << "as well as one shared_key";
-  for (int i = 0; i < kThreadCount; ++i) {
-    ExpectKeyAndValueWereRecordedForId(properties, i, "string");
-    ExpectKeyAndValueWereRecordedForId(properties, i, "int");
-  }
-  CheckTestFailureCount(kThreadCount*kThreadCount);
-}
-
-void FailingThread(bool is_fatal) {
-  if (is_fatal)
-    FAIL() << "Fatal failure in some other thread. "
-           << "(This failure is expected.)";
-  else
-    ADD_FAILURE() << "Non-fatal failure in some other thread. "
-                  << "(This failure is expected.)";
-}
-
-void GenerateFatalFailureInAnotherThread(bool is_fatal) {
-  ThreadWithParam<bool> thread(&FailingThread, is_fatal, nullptr);
-  thread.Join();
-}
-
-TEST(NoFatalFailureTest, ExpectNoFatalFailureIgnoresFailuresInOtherThreads) {
-  EXPECT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
-  // We should only have one failure (the one from
-  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
-  // should succeed.
-  CheckTestFailureCount(1);
-}
-
-void AssertNoFatalFailureIgnoresFailuresInOtherThreads() {
-  ASSERT_NO_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true));
-}
-TEST(NoFatalFailureTest, AssertNoFatalFailureIgnoresFailuresInOtherThreads) {
-  // Using a subroutine, to make sure, that the test continues.
-  AssertNoFatalFailureIgnoresFailuresInOtherThreads();
-  // We should only have one failure (the one from
-  // GenerateFatalFailureInAnotherThread()), since the EXPECT_NO_FATAL_FAILURE
-  // should succeed.
-  CheckTestFailureCount(1);
-}
-
-TEST(FatalFailureTest, ExpectFatalFailureIgnoresFailuresInOtherThreads) {
-  // This statement should fail, since the current thread doesn't generate a
-  // fatal failure, only another one does.
-  EXPECT_FATAL_FAILURE(GenerateFatalFailureInAnotherThread(true), "expected");
-  CheckTestFailureCount(2);
-}
-
-TEST(FatalFailureOnAllThreadsTest, ExpectFatalFailureOnAllThreads) {
-  // This statement should succeed, because failures in all threads are
-  // considered.
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(
-      GenerateFatalFailureInAnotherThread(true), "expected");
-  CheckTestFailureCount(0);
-  // We need to add a failure, because main() checks that there are failures.
-  // But when only this test is run, we shouldn't have any failures.
-  ADD_FAILURE() << "This is an expected non-fatal failure.";
-}
-
-TEST(NonFatalFailureTest, ExpectNonFatalFailureIgnoresFailuresInOtherThreads) {
-  // This statement should fail, since the current thread doesn't generate a
-  // fatal failure, only another one does.
-  EXPECT_NONFATAL_FAILURE(GenerateFatalFailureInAnotherThread(false),
-                          "expected");
-  CheckTestFailureCount(2);
-}
-
-TEST(NonFatalFailureOnAllThreadsTest, ExpectNonFatalFailureOnAllThreads) {
-  // This statement should succeed, because failures in all threads are
-  // considered.
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
-      GenerateFatalFailureInAnotherThread(false), "expected");
-  CheckTestFailureCount(0);
-  // We need to add a failure, because main() checks that there are failures,
-  // But when only this test is run, we shouldn't have any failures.
-  ADD_FAILURE() << "This is an expected non-fatal failure.";
-}
-
-}  // namespace
-}  // namespace testing
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  const int result = RUN_ALL_TESTS();  // Expected to fail.
-  GTEST_CHECK_(result == 1) << "RUN_ALL_TESTS() did not fail as expected";
-
-  printf("\nPASS\n");
-  return 0;
-}
-
-#else
-TEST(StressTest,
-     DISABLED_ThreadSafetyTestsAreSkippedWhenGoogleTestIsNotThreadSafe) {
-}
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-  return RUN_ALL_TESTS();
-}
-#endif  // GTEST_IS_THREADSAFE
diff --git a/3rdparty/gtest/test/gtest_test_macro_stack_footprint_test.cc b/3rdparty/gtest/test/gtest_test_macro_stack_footprint_test.cc
deleted file mode 100644
index a48db050..00000000
--- a/3rdparty/gtest/test/gtest_test_macro_stack_footprint_test.cc
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright 2013, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Each TEST() expands to some static registration logic.  GCC puts all
-// such static initialization logic for a translation unit in a common,
-// internal function.  Since Google's build system restricts how much
-// stack space a function can use, there's a limit on how many TEST()s
-// one can put in a single C++ test file.  This test ensures that a large
-// number of TEST()s can be defined in the same translation unit.
-
-#include "gtest/gtest.h"
-
-// This macro defines 10 dummy tests.
-#define TEN_TESTS_(test_case_name) \
-  TEST(test_case_name, T0) {} \
-  TEST(test_case_name, T1) {} \
-  TEST(test_case_name, T2) {} \
-  TEST(test_case_name, T3) {} \
-  TEST(test_case_name, T4) {} \
-  TEST(test_case_name, T5) {} \
-  TEST(test_case_name, T6) {} \
-  TEST(test_case_name, T7) {} \
-  TEST(test_case_name, T8) {} \
-  TEST(test_case_name, T9) {}
-
-// This macro defines 100 dummy tests.
-#define HUNDRED_TESTS_(test_case_name_prefix) \
-  TEN_TESTS_(test_case_name_prefix ## 0) \
-  TEN_TESTS_(test_case_name_prefix ## 1) \
-  TEN_TESTS_(test_case_name_prefix ## 2) \
-  TEN_TESTS_(test_case_name_prefix ## 3) \
-  TEN_TESTS_(test_case_name_prefix ## 4) \
-  TEN_TESTS_(test_case_name_prefix ## 5) \
-  TEN_TESTS_(test_case_name_prefix ## 6) \
-  TEN_TESTS_(test_case_name_prefix ## 7) \
-  TEN_TESTS_(test_case_name_prefix ## 8) \
-  TEN_TESTS_(test_case_name_prefix ## 9)
-
-// This macro defines 1000 dummy tests.
-#define THOUSAND_TESTS_(test_case_name_prefix) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 0) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 1) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 2) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 3) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 4) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 5) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 6) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 7) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 8) \
-  HUNDRED_TESTS_(test_case_name_prefix ## 9)
-
-// Ensures that we can define 1000 TEST()s in the same translation
-// unit.
-THOUSAND_TESTS_(T)
-
-int main(int argc, char **argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // We don't actually need to run the dummy tests - the purpose is to
-  // ensure that they compile.
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_test_utils.py b/3rdparty/gtest/test/gtest_test_utils.py
deleted file mode 100644
index ef9363c3..00000000
--- a/3rdparty/gtest/test/gtest_test_utils.py
+++ /dev/null
@@ -1,314 +0,0 @@
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for Google C++ Testing and Mocking Framework."""
-# Suppresses the 'Import not at the top of the file' lint complaint.
-# pylint: disable-msg=C6204
-
-import os
-import sys
-
-IS_WINDOWS = os.name == 'nt'
-IS_CYGWIN = os.name == 'posix' and 'CYGWIN' in os.uname()[0]
-IS_OS2 = os.name == 'os2'
-
-import atexit
-import shutil
-import tempfile
-import unittest as _test_module
-
-try:
-  import subprocess
-  _SUBPROCESS_MODULE_AVAILABLE = True
-except:
-  import popen2
-  _SUBPROCESS_MODULE_AVAILABLE = False
-# pylint: enable-msg=C6204
-
-GTEST_OUTPUT_VAR_NAME = 'GTEST_OUTPUT'
-
-# The environment variable for specifying the path to the premature-exit file.
-PREMATURE_EXIT_FILE_ENV_VAR = 'TEST_PREMATURE_EXIT_FILE'
-
-environ = os.environ.copy()
-
-
-def SetEnvVar(env_var, value):
-  """Sets/unsets an environment variable to a given value."""
-
-  if value is not None:
-    environ[env_var] = value
-  elif env_var in environ:
-    del environ[env_var]
-
-
-# Here we expose a class from a particular module, depending on the
-# environment. The comment suppresses the 'Invalid variable name' lint
-# complaint.
-TestCase = _test_module.TestCase  # pylint: disable=C6409
-
-# Initially maps a flag to its default value. After
-# _ParseAndStripGTestFlags() is called, maps a flag to its actual value.
-_flag_map = {'source_dir': os.path.dirname(sys.argv[0]),
-             'build_dir': os.path.dirname(sys.argv[0])}
-_gtest_flags_are_parsed = False
-
-
-def _ParseAndStripGTestFlags(argv):
-  """Parses and strips Google Test flags from argv.  This is idempotent."""
-
-  # Suppresses the lint complaint about a global variable since we need it
-  # here to maintain module-wide state.
-  global _gtest_flags_are_parsed  # pylint: disable=W0603
-  if _gtest_flags_are_parsed:
-    return
-
-  _gtest_flags_are_parsed = True
-  for flag in _flag_map:
-    # The environment variable overrides the default value.
-    if flag.upper() in os.environ:
-      _flag_map[flag] = os.environ[flag.upper()]
-
-    # The command line flag overrides the environment variable.
-    i = 1  # Skips the program name.
-    while i < len(argv):
-      prefix = '--' + flag + '='
-      if argv[i].startswith(prefix):
-        _flag_map[flag] = argv[i][len(prefix):]
-        del argv[i]
-        break
-      else:
-        # We don't increment i in case we just found a --gtest_* flag
-        # and removed it from argv.
-        i += 1
-
-
-def GetFlag(flag):
-  """Returns the value of the given flag."""
-
-  # In case GetFlag() is called before Main(), we always call
-  # _ParseAndStripGTestFlags() here to make sure the --gtest_* flags
-  # are parsed.
-  _ParseAndStripGTestFlags(sys.argv)
-
-  return _flag_map[flag]
-
-
-def GetSourceDir():
-  """Returns the absolute path of the directory where the .py files are."""
-
-  return os.path.abspath(GetFlag('source_dir'))
-
-
-def GetBuildDir():
-  """Returns the absolute path of the directory where the test binaries are."""
-
-  return os.path.abspath(GetFlag('build_dir'))
-
-
-_temp_dir = None
-
-def _RemoveTempDir():
-  if _temp_dir:
-    shutil.rmtree(_temp_dir, ignore_errors=True)
-
-atexit.register(_RemoveTempDir)
-
-
-def GetTempDir():
-  global _temp_dir
-  if not _temp_dir:
-    _temp_dir = tempfile.mkdtemp()
-  return _temp_dir
-
-
-def GetTestExecutablePath(executable_name, build_dir=None):
-  """Returns the absolute path of the test binary given its name.
-
-  The function will print a message and abort the program if the resulting file
-  doesn't exist.
-
-  Args:
-    executable_name: name of the test binary that the test script runs.
-    build_dir:       directory where to look for executables, by default
-                     the result of GetBuildDir().
-
-  Returns:
-    The absolute path of the test binary.
-  """
-
-  path = os.path.abspath(os.path.join(build_dir or GetBuildDir(),
-                                      executable_name))
-  if (IS_WINDOWS or IS_CYGWIN or IS_OS2) and not path.endswith('.exe'):
-    path += '.exe'
-
-  if not os.path.exists(path):
-    message = (
-        'Unable to find the test binary "%s". Please make sure to provide\n'
-        'a path to the binary via the --build_dir flag or the BUILD_DIR\n'
-        'environment variable.' % path)
-    print >> sys.stderr, message
-    sys.exit(1)
-
-  return path
-
-
-def GetExitStatus(exit_code):
-  """Returns the argument to exit(), or -1 if exit() wasn't called.
-
-  Args:
-    exit_code: the result value of os.system(command).
-  """
-
-  if os.name == 'nt':
-    # On Windows, os.WEXITSTATUS() doesn't work and os.system() returns
-    # the argument to exit() directly.
-    return exit_code
-  else:
-    # On Unix, os.WEXITSTATUS() must be used to extract the exit status
-    # from the result of os.system().
-    if os.WIFEXITED(exit_code):
-      return os.WEXITSTATUS(exit_code)
-    else:
-      return -1
-
-
-class Subprocess:
-  def __init__(self, command, working_dir=None, capture_stderr=True, env=None):
-    """Changes into a specified directory, if provided, and executes a command.
-
-    Restores the old directory afterwards.
-
-    Args:
-      command:        The command to run, in the form of sys.argv.
-      working_dir:    The directory to change into.
-      capture_stderr: Determines whether to capture stderr in the output member
-                      or to discard it.
-      env:            Dictionary with environment to pass to the subprocess.
-
-    Returns:
-      An object that represents outcome of the executed process. It has the
-      following attributes:
-        terminated_by_signal   True if and only if the child process has been
-                               terminated by a signal.
-        signal                 Sygnal that terminated the child process.
-        exited                 True if and only if the child process exited
-                               normally.
-        exit_code              The code with which the child process exited.
-        output                 Child process's stdout and stderr output
-                               combined in a string.
-    """
-
-    # The subprocess module is the preferrable way of running programs
-    # since it is available and behaves consistently on all platforms,
-    # including Windows. But it is only available starting in python 2.4.
-    # In earlier python versions, we revert to the popen2 module, which is
-    # available in python 2.0 and later but doesn't provide required
-    # functionality (Popen4) under Windows. This allows us to support Mac
-    # OS X 10.4 Tiger, which has python 2.3 installed.
-    if _SUBPROCESS_MODULE_AVAILABLE:
-      if capture_stderr:
-        stderr = subprocess.STDOUT
-      else:
-        stderr = subprocess.PIPE
-
-      p = subprocess.Popen(command,
-                           stdout=subprocess.PIPE, stderr=stderr,
-                           cwd=working_dir, universal_newlines=True, env=env)
-      # communicate returns a tuple with the file object for the child's
-      # output.
-      self.output = p.communicate()[0]
-      self._return_code = p.returncode
-    else:
-      old_dir = os.getcwd()
-
-      def _ReplaceEnvDict(dest, src):
-        # Changes made by os.environ.clear are not inheritable by child
-        # processes until Python 2.6. To produce inheritable changes we have
-        # to delete environment items with the del statement.
-        for key in dest.keys():
-          del dest[key]
-        dest.update(src)
-
-      # When 'env' is not None, backup the environment variables and replace
-      # them with the passed 'env'. When 'env' is None, we simply use the
-      # current 'os.environ' for compatibility with the subprocess.Popen
-      # semantics used above.
-      if env is not None:
-        old_environ = os.environ.copy()
-        _ReplaceEnvDict(os.environ, env)
-
-      try:
-        if working_dir is not None:
-          os.chdir(working_dir)
-        if capture_stderr:
-          p = popen2.Popen4(command)
-        else:
-          p = popen2.Popen3(command)
-        p.tochild.close()
-        self.output = p.fromchild.read()
-        ret_code = p.wait()
-      finally:
-        os.chdir(old_dir)
-
-        # Restore the old environment variables
-        # if they were replaced.
-        if env is not None:
-          _ReplaceEnvDict(os.environ, old_environ)
-
-      # Converts ret_code to match the semantics of
-      # subprocess.Popen.returncode.
-      if os.WIFSIGNALED(ret_code):
-        self._return_code = -os.WTERMSIG(ret_code)
-      else:  # os.WIFEXITED(ret_code) should return True here.
-        self._return_code = os.WEXITSTATUS(ret_code)
-
-    if self._return_code < 0:
-      self.terminated_by_signal = True
-      self.exited = False
-      self.signal = -self._return_code
-    else:
-      self.terminated_by_signal = False
-      self.exited = True
-      self.exit_code = self._return_code
-
-
-def Main():
-  """Runs the unit test."""
-
-  # We must call _ParseAndStripGTestFlags() before calling
-  # unittest.main().  Otherwise the latter will be confused by the
-  # --gtest_* flags.
-  _ParseAndStripGTestFlags(sys.argv)
-  # The tested binaries should not be writing XML output files unless the
-  # script explicitly instructs them to.
-  if GTEST_OUTPUT_VAR_NAME in os.environ:
-    del os.environ[GTEST_OUTPUT_VAR_NAME]
-
-  _test_module.main()
diff --git a/3rdparty/gtest/test/gtest_testbridge_test.py b/3rdparty/gtest/test/gtest_testbridge_test.py
deleted file mode 100644
index 87ffad73..00000000
--- a/3rdparty/gtest/test/gtest_testbridge_test.py
+++ /dev/null
@@ -1,63 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2018 Google LLC. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-"""Verifies that Google Test uses filter provided via testbridge."""
-
-import os
-
-import gtest_test_utils
-
-binary_name = 'gtest_testbridge_test_'
-COMMAND = gtest_test_utils.GetTestExecutablePath(binary_name)
-TESTBRIDGE_NAME = 'TESTBRIDGE_TEST_ONLY'
-
-
-def Assert(condition):
-  if not condition:
-    raise AssertionError
-
-
-class GTestTestFilterTest(gtest_test_utils.TestCase):
-
-  def testTestExecutionIsFiltered(self):
-    """Tests that the test filter is picked up from the testbridge env var."""
-    subprocess_env = os.environ.copy()
-
-    subprocess_env[TESTBRIDGE_NAME] = '*.TestThatSucceeds'
-    p = gtest_test_utils.Subprocess(COMMAND, env=subprocess_env)
-
-    self.assertEquals(0, p.exit_code)
-
-    Assert('filter = *.TestThatSucceeds' in p.output)
-    Assert('[       OK ] TestFilterTest.TestThatSucceeds' in p.output)
-    Assert('[  PASSED  ] 1 test.' in p.output)
-
-
-if __name__ == '__main__':
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_testbridge_test_.cc b/3rdparty/gtest/test/gtest_testbridge_test_.cc
deleted file mode 100644
index 24617b20..00000000
--- a/3rdparty/gtest/test/gtest_testbridge_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2018, Google LLC.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// This program is meant to be run by gtest_test_filter_test.py.  Do not run
-// it directly.
-
-#include "gtest/gtest.h"
-
-// These tests are used to detect if filtering is working. Only
-// 'TestThatSucceeds' should ever run.
-
-TEST(TestFilterTest, TestThatSucceeds) {}
-
-TEST(TestFilterTest, TestThatFails) {
-  ASSERT_TRUE(false) << "This test should never be run.";
-}
diff --git a/3rdparty/gtest/test/gtest_throw_on_failure_ex_test.cc b/3rdparty/gtest/test/gtest_throw_on_failure_ex_test.cc
deleted file mode 100644
index 1d95adbf..00000000
--- a/3rdparty/gtest/test/gtest_throw_on_failure_ex_test.cc
+++ /dev/null
@@ -1,90 +0,0 @@
-// Copyright 2009, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-
-// Tests Google Test's throw-on-failure mode with exceptions enabled.
-
-#include "gtest/gtest.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <stdexcept>
-
-// Prints the given failure message and exits the program with
-// non-zero.  We use this instead of a Google Test assertion to
-// indicate a failure, as the latter is been tested and cannot be
-// relied on.
-void Fail(const char* msg) {
-  printf("FAILURE: %s\n", msg);
-  fflush(stdout);
-  exit(1);
-}
-
-// Tests that an assertion failure throws a subclass of
-// std::runtime_error.
-void TestFailureThrowsRuntimeError() {
-  testing::GTEST_FLAG(throw_on_failure) = true;
-
-  // A successful assertion shouldn't throw.
-  try {
-    EXPECT_EQ(3, 3);
-  } catch(...) {
-    Fail("A successful assertion wrongfully threw.");
-  }
-
-  // A failed assertion should throw a subclass of std::runtime_error.
-  try {
-    EXPECT_EQ(2, 3) << "Expected failure";
-  } catch(const std::runtime_error& e) {
-    if (strstr(e.what(), "Expected failure") != nullptr) return;
-
-    printf("%s",
-           "A failed assertion did throw an exception of the right type, "
-           "but the message is incorrect.  Instead of containing \"Expected "
-           "failure\", it is:\n");
-    Fail(e.what());
-  } catch(...) {
-    Fail("A failed assertion threw the wrong type of exception.");
-  }
-  Fail("A failed assertion should've thrown but didn't.");
-}
-
-int main(int argc, char** argv) {
-  testing::InitGoogleTest(&argc, argv);
-
-  // We want to ensure that people can use Google Test assertions in
-  // other testing frameworks, as long as they initialize Google Test
-  // properly and set the thrown-on-failure mode.  Therefore, we don't
-  // use Google Test's constructs for defining and running tests
-  // (e.g. TEST and RUN_ALL_TESTS) here.
-
-  TestFailureThrowsRuntimeError();
-  return 0;
-}
diff --git a/3rdparty/gtest/test/gtest_unittest.cc b/3rdparty/gtest/test/gtest_unittest.cc
deleted file mode 100644
index 39749b7b..00000000
--- a/3rdparty/gtest/test/gtest_unittest.cc
+++ /dev/null
@@ -1,7488 +0,0 @@
-// Copyright 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// Tests for Google Test itself.  This verifies that the basic constructs of
-// Google Test work.
-
-#include "gtest/gtest.h"
-
-// Verifies that the command line flag variables can be accessed in
-// code once "gtest.h" has been #included.
-// Do not move it after other gtest #includes.
-TEST(CommandLineFlagsTest, CanBeAccessedInCodeOnceGTestHIsIncluded) {
-  bool dummy = testing::GTEST_FLAG(also_run_disabled_tests)
-      || testing::GTEST_FLAG(break_on_failure)
-      || testing::GTEST_FLAG(catch_exceptions)
-      || testing::GTEST_FLAG(color) != "unknown"
-      || testing::GTEST_FLAG(filter) != "unknown"
-      || testing::GTEST_FLAG(list_tests)
-      || testing::GTEST_FLAG(output) != "unknown"
-      || testing::GTEST_FLAG(print_time)
-      || testing::GTEST_FLAG(random_seed)
-      || testing::GTEST_FLAG(repeat) > 0
-      || testing::GTEST_FLAG(show_internal_stack_frames)
-      || testing::GTEST_FLAG(shuffle)
-      || testing::GTEST_FLAG(stack_trace_depth) > 0
-      || testing::GTEST_FLAG(stream_result_to) != "unknown"
-      || testing::GTEST_FLAG(throw_on_failure);
-  EXPECT_TRUE(dummy || !dummy);  // Suppresses warning that dummy is unused.
-}
-
-#include <limits.h>  // For INT_MAX.
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-
-#include <map>
-#include <ostream>
-#include <type_traits>
-#include <unordered_set>
-#include <vector>
-
-#include "gtest/gtest-spi.h"
-#include "src/gtest-internal-inl.h"
-
-namespace testing {
-namespace internal {
-
-#if GTEST_CAN_STREAM_RESULTS_
-
-class StreamingListenerTest : public Test {
- public:
-  class FakeSocketWriter : public StreamingListener::AbstractSocketWriter {
-   public:
-    // Sends a string to the socket.
-    void Send(const std::string& message) override { output_ += message; }
-
-    std::string output_;
-  };
-
-  StreamingListenerTest()
-      : fake_sock_writer_(new FakeSocketWriter),
-        streamer_(fake_sock_writer_),
-        test_info_obj_("FooTest", "Bar", nullptr, nullptr,
-                       CodeLocation(__FILE__, __LINE__), nullptr, nullptr) {}
-
- protected:
-  std::string* output() { return &(fake_sock_writer_->output_); }
-
-  FakeSocketWriter* const fake_sock_writer_;
-  StreamingListener streamer_;
-  UnitTest unit_test_;
-  TestInfo test_info_obj_;  // The name test_info_ was taken by testing::Test.
-};
-
-TEST_F(StreamingListenerTest, OnTestProgramEnd) {
-  *output() = "";
-  streamer_.OnTestProgramEnd(unit_test_);
-  EXPECT_EQ("event=TestProgramEnd&passed=1\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestIterationEnd) {
-  *output() = "";
-  streamer_.OnTestIterationEnd(unit_test_, 42);
-  EXPECT_EQ("event=TestIterationEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestCaseStart) {
-  *output() = "";
-  streamer_.OnTestCaseStart(TestCase("FooTest", "Bar", nullptr, nullptr));
-  EXPECT_EQ("event=TestCaseStart&name=FooTest\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestCaseEnd) {
-  *output() = "";
-  streamer_.OnTestCaseEnd(TestCase("FooTest", "Bar", nullptr, nullptr));
-  EXPECT_EQ("event=TestCaseEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestStart) {
-  *output() = "";
-  streamer_.OnTestStart(test_info_obj_);
-  EXPECT_EQ("event=TestStart&name=Bar\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestEnd) {
-  *output() = "";
-  streamer_.OnTestEnd(test_info_obj_);
-  EXPECT_EQ("event=TestEnd&passed=1&elapsed_time=0ms\n", *output());
-}
-
-TEST_F(StreamingListenerTest, OnTestPartResult) {
-  *output() = "";
-  streamer_.OnTestPartResult(TestPartResult(
-      TestPartResult::kFatalFailure, "foo.cc", 42, "failed=\n&%"));
-
-  // Meta characters in the failure message should be properly escaped.
-  EXPECT_EQ(
-      "event=TestPartResult&file=foo.cc&line=42&message=failed%3D%0A%26%25\n",
-      *output());
-}
-
-#endif  // GTEST_CAN_STREAM_RESULTS_
-
-// Provides access to otherwise private parts of the TestEventListeners class
-// that are needed to test it.
-class TestEventListenersAccessor {
- public:
-  static TestEventListener* GetRepeater(TestEventListeners* listeners) {
-    return listeners->repeater();
-  }
-
-  static void SetDefaultResultPrinter(TestEventListeners* listeners,
-                                      TestEventListener* listener) {
-    listeners->SetDefaultResultPrinter(listener);
-  }
-  static void SetDefaultXmlGenerator(TestEventListeners* listeners,
-                                     TestEventListener* listener) {
-    listeners->SetDefaultXmlGenerator(listener);
-  }
-
-  static bool EventForwardingEnabled(const TestEventListeners& listeners) {
-    return listeners.EventForwardingEnabled();
-  }
-
-  static void SuppressEventForwarding(TestEventListeners* listeners) {
-    listeners->SuppressEventForwarding();
-  }
-};
-
-class UnitTestRecordPropertyTestHelper : public Test {
- protected:
-  UnitTestRecordPropertyTestHelper() {}
-
-  // Forwards to UnitTest::RecordProperty() to bypass access controls.
-  void UnitTestRecordProperty(const char* key, const std::string& value) {
-    unit_test_.RecordProperty(key, value);
-  }
-
-  UnitTest unit_test_;
-};
-
-}  // namespace internal
-}  // namespace testing
-
-using testing::AssertionFailure;
-using testing::AssertionResult;
-using testing::AssertionSuccess;
-using testing::DoubleLE;
-using testing::EmptyTestEventListener;
-using testing::Environment;
-using testing::FloatLE;
-using testing::GTEST_FLAG(also_run_disabled_tests);
-using testing::GTEST_FLAG(break_on_failure);
-using testing::GTEST_FLAG(catch_exceptions);
-using testing::GTEST_FLAG(color);
-using testing::GTEST_FLAG(death_test_use_fork);
-using testing::GTEST_FLAG(filter);
-using testing::GTEST_FLAG(list_tests);
-using testing::GTEST_FLAG(output);
-using testing::GTEST_FLAG(print_time);
-using testing::GTEST_FLAG(random_seed);
-using testing::GTEST_FLAG(repeat);
-using testing::GTEST_FLAG(show_internal_stack_frames);
-using testing::GTEST_FLAG(shuffle);
-using testing::GTEST_FLAG(stack_trace_depth);
-using testing::GTEST_FLAG(stream_result_to);
-using testing::GTEST_FLAG(throw_on_failure);
-using testing::IsNotSubstring;
-using testing::IsSubstring;
-using testing::Message;
-using testing::ScopedFakeTestPartResultReporter;
-using testing::StaticAssertTypeEq;
-using testing::Test;
-using testing::TestCase;
-using testing::TestEventListeners;
-using testing::TestInfo;
-using testing::TestPartResult;
-using testing::TestPartResultArray;
-using testing::TestProperty;
-using testing::TestResult;
-using testing::TimeInMillis;
-using testing::UnitTest;
-using testing::internal::AlwaysFalse;
-using testing::internal::AlwaysTrue;
-using testing::internal::AppendUserMessage;
-using testing::internal::ArrayAwareFind;
-using testing::internal::ArrayEq;
-using testing::internal::CodePointToUtf8;
-using testing::internal::CopyArray;
-using testing::internal::CountIf;
-using testing::internal::EqFailure;
-using testing::internal::FloatingPoint;
-using testing::internal::ForEach;
-using testing::internal::FormatEpochTimeInMillisAsIso8601;
-using testing::internal::FormatTimeInMillisAsSeconds;
-using testing::internal::GTestFlagSaver;
-using testing::internal::GetCurrentOsStackTraceExceptTop;
-using testing::internal::GetElementOr;
-using testing::internal::GetNextRandomSeed;
-using testing::internal::GetRandomSeedFromFlag;
-using testing::internal::GetTestTypeId;
-using testing::internal::GetTimeInMillis;
-using testing::internal::GetTypeId;
-using testing::internal::GetUnitTestImpl;
-using testing::internal::Int32;
-using testing::internal::Int32FromEnvOrDie;
-using testing::internal::IsAProtocolMessage;
-using testing::internal::IsContainer;
-using testing::internal::IsContainerTest;
-using testing::internal::IsNotContainer;
-using testing::internal::NativeArray;
-using testing::internal::OsStackTraceGetter;
-using testing::internal::OsStackTraceGetterInterface;
-using testing::internal::ParseInt32Flag;
-using testing::internal::RelationToSourceCopy;
-using testing::internal::RelationToSourceReference;
-using testing::internal::ShouldRunTestOnShard;
-using testing::internal::ShouldShard;
-using testing::internal::ShouldUseColor;
-using testing::internal::Shuffle;
-using testing::internal::ShuffleRange;
-using testing::internal::SkipPrefix;
-using testing::internal::StreamableToString;
-using testing::internal::String;
-using testing::internal::TestEventListenersAccessor;
-using testing::internal::TestResultAccessor;
-using testing::internal::UInt32;
-using testing::internal::UnitTestImpl;
-using testing::internal::WideStringToUtf8;
-using testing::internal::edit_distance::CalculateOptimalEdits;
-using testing::internal::edit_distance::CreateUnifiedDiff;
-using testing::internal::edit_distance::EditType;
-using testing::internal::kMaxRandomSeed;
-using testing::internal::kTestTypeIdInGoogleTest;
-using testing::kMaxStackTraceDepth;
-
-#if GTEST_HAS_STREAM_REDIRECTION
-using testing::internal::CaptureStdout;
-using testing::internal::GetCapturedStdout;
-#endif
-
-#if GTEST_IS_THREADSAFE
-using testing::internal::ThreadWithParam;
-#endif
-
-class TestingVector : public std::vector<int> {
-};
-
-::std::ostream& operator<<(::std::ostream& os,
-                           const TestingVector& vector) {
-  os << "{ ";
-  for (size_t i = 0; i < vector.size(); i++) {
-    os << vector[i] << " ";
-  }
-  os << "}";
-  return os;
-}
-
-// This line tests that we can define tests in an unnamed namespace.
-namespace {
-
-TEST(GetRandomSeedFromFlagTest, HandlesZero) {
-  const int seed = GetRandomSeedFromFlag(0);
-  EXPECT_LE(1, seed);
-  EXPECT_LE(seed, static_cast<int>(kMaxRandomSeed));
-}
-
-TEST(GetRandomSeedFromFlagTest, PreservesValidSeed) {
-  EXPECT_EQ(1, GetRandomSeedFromFlag(1));
-  EXPECT_EQ(2, GetRandomSeedFromFlag(2));
-  EXPECT_EQ(kMaxRandomSeed - 1, GetRandomSeedFromFlag(kMaxRandomSeed - 1));
-  EXPECT_EQ(static_cast<int>(kMaxRandomSeed),
-            GetRandomSeedFromFlag(kMaxRandomSeed));
-}
-
-TEST(GetRandomSeedFromFlagTest, NormalizesInvalidSeed) {
-  const int seed1 = GetRandomSeedFromFlag(-1);
-  EXPECT_LE(1, seed1);
-  EXPECT_LE(seed1, static_cast<int>(kMaxRandomSeed));
-
-  const int seed2 = GetRandomSeedFromFlag(kMaxRandomSeed + 1);
-  EXPECT_LE(1, seed2);
-  EXPECT_LE(seed2, static_cast<int>(kMaxRandomSeed));
-}
-
-TEST(GetNextRandomSeedTest, WorksForValidInput) {
-  EXPECT_EQ(2, GetNextRandomSeed(1));
-  EXPECT_EQ(3, GetNextRandomSeed(2));
-  EXPECT_EQ(static_cast<int>(kMaxRandomSeed),
-            GetNextRandomSeed(kMaxRandomSeed - 1));
-  EXPECT_EQ(1, GetNextRandomSeed(kMaxRandomSeed));
-
-  // We deliberately don't test GetNextRandomSeed() with invalid
-  // inputs, as that requires death tests, which are expensive.  This
-  // is fine as GetNextRandomSeed() is internal and has a
-  // straightforward definition.
-}
-
-static void ClearCurrentTestPartResults() {
-  TestResultAccessor::ClearTestPartResults(
-      GetUnitTestImpl()->current_test_result());
-}
-
-// Tests GetTypeId.
-
-TEST(GetTypeIdTest, ReturnsSameValueForSameType) {
-  EXPECT_EQ(GetTypeId<int>(), GetTypeId<int>());
-  EXPECT_EQ(GetTypeId<Test>(), GetTypeId<Test>());
-}
-
-class SubClassOfTest : public Test {};
-class AnotherSubClassOfTest : public Test {};
-
-TEST(GetTypeIdTest, ReturnsDifferentValuesForDifferentTypes) {
-  EXPECT_NE(GetTypeId<int>(), GetTypeId<const int>());
-  EXPECT_NE(GetTypeId<int>(), GetTypeId<char>());
-  EXPECT_NE(GetTypeId<int>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<SubClassOfTest>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<AnotherSubClassOfTest>(), GetTestTypeId());
-  EXPECT_NE(GetTypeId<AnotherSubClassOfTest>(), GetTypeId<SubClassOfTest>());
-}
-
-// Verifies that GetTestTypeId() returns the same value, no matter it
-// is called from inside Google Test or outside of it.
-TEST(GetTestTypeIdTest, ReturnsTheSameValueInsideOrOutsideOfGoogleTest) {
-  EXPECT_EQ(kTestTypeIdInGoogleTest, GetTestTypeId());
-}
-
-// Tests CanonicalizeForStdLibVersioning.
-
-using ::testing::internal::CanonicalizeForStdLibVersioning;
-
-TEST(CanonicalizeForStdLibVersioning, LeavesUnversionedNamesUnchanged) {
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::_"));
-  EXPECT_EQ("std::__foo", CanonicalizeForStdLibVersioning("std::__foo"));
-  EXPECT_EQ("gtl::__1::x", CanonicalizeForStdLibVersioning("gtl::__1::x"));
-  EXPECT_EQ("__1::x", CanonicalizeForStdLibVersioning("__1::x"));
-  EXPECT_EQ("::__1::x", CanonicalizeForStdLibVersioning("::__1::x"));
-}
-
-TEST(CanonicalizeForStdLibVersioning, ElidesDoubleUnderNames) {
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::__1::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__1::_"));
-
-  EXPECT_EQ("std::bind", CanonicalizeForStdLibVersioning("std::__g::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__g::_"));
-
-  EXPECT_EQ("std::bind",
-            CanonicalizeForStdLibVersioning("std::__google::bind"));
-  EXPECT_EQ("std::_", CanonicalizeForStdLibVersioning("std::__google::_"));
-}
-
-// Tests FormatTimeInMillisAsSeconds().
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsZero) {
-  EXPECT_EQ("0", FormatTimeInMillisAsSeconds(0));
-}
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsPositiveNumber) {
-  EXPECT_EQ("0.003", FormatTimeInMillisAsSeconds(3));
-  EXPECT_EQ("0.01", FormatTimeInMillisAsSeconds(10));
-  EXPECT_EQ("0.2", FormatTimeInMillisAsSeconds(200));
-  EXPECT_EQ("1.2", FormatTimeInMillisAsSeconds(1200));
-  EXPECT_EQ("3", FormatTimeInMillisAsSeconds(3000));
-}
-
-TEST(FormatTimeInMillisAsSecondsTest, FormatsNegativeNumber) {
-  EXPECT_EQ("-0.003", FormatTimeInMillisAsSeconds(-3));
-  EXPECT_EQ("-0.01", FormatTimeInMillisAsSeconds(-10));
-  EXPECT_EQ("-0.2", FormatTimeInMillisAsSeconds(-200));
-  EXPECT_EQ("-1.2", FormatTimeInMillisAsSeconds(-1200));
-  EXPECT_EQ("-3", FormatTimeInMillisAsSeconds(-3000));
-}
-
-// Tests FormatEpochTimeInMillisAsIso8601().  The correctness of conversion
-// for particular dates below was verified in Python using
-// datetime.datetime.fromutctimestamp(<timetamp>/1000).
-
-// FormatEpochTimeInMillisAsIso8601 depends on the current timezone, so we
-// have to set up a particular timezone to obtain predictable results.
-class FormatEpochTimeInMillisAsIso8601Test : public Test {
- public:
-  // On Cygwin, GCC doesn't allow unqualified integer literals to exceed
-  // 32 bits, even when 64-bit integer types are available.  We have to
-  // force the constants to have a 64-bit type here.
-  static const TimeInMillis kMillisPerSec = 1000;
-
- private:
-  void SetUp() override {
-    saved_tz_ = nullptr;
-
-    GTEST_DISABLE_MSC_DEPRECATED_PUSH_(/* getenv, strdup: deprecated */)
-    if (getenv("TZ"))
-      saved_tz_ = strdup(getenv("TZ"));
-    GTEST_DISABLE_MSC_DEPRECATED_POP_()
-
-    // Set up the time zone for FormatEpochTimeInMillisAsIso8601 to use.  We
-    // cannot use the local time zone because the function's output depends
-    // on the time zone.
-    SetTimeZone("UTC+00");
-  }
-
-  void TearDown() override {
-    SetTimeZone(saved_tz_);
-    free(const_cast<char*>(saved_tz_));
-    saved_tz_ = nullptr;
-  }
-
-  static void SetTimeZone(const char* time_zone) {
-    // tzset() distinguishes between the TZ variable being present and empty
-    // and not being present, so we have to consider the case of time_zone
-    // being NULL.
-#if _MSC_VER || GTEST_OS_WINDOWS_MINGW
-    // ...Unless it's MSVC, whose standard library's _putenv doesn't
-    // distinguish between an empty and a missing variable.
-    const std::string env_var =
-        std::string("TZ=") + (time_zone ? time_zone : "");
-    _putenv(env_var.c_str());
-    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996 /* deprecated function */)
-    tzset();
-    GTEST_DISABLE_MSC_WARNINGS_POP_()
-#else
-    if (time_zone) {
-      setenv(("TZ"), time_zone, 1);
-    } else {
-      unsetenv("TZ");
-    }
-    tzset();
-#endif
-  }
-
-  const char* saved_tz_;
-};
-
-const TimeInMillis FormatEpochTimeInMillisAsIso8601Test::kMillisPerSec;
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsTwoDigitSegments) {
-  EXPECT_EQ("2011-10-31T18:52:42",
-            FormatEpochTimeInMillisAsIso8601(1320087162 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, MillisecondsDoNotAffectResult) {
-  EXPECT_EQ(
-      "2011-10-31T18:52:42",
-      FormatEpochTimeInMillisAsIso8601(1320087162 * kMillisPerSec + 234));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsLeadingZeroes) {
-  EXPECT_EQ("2011-09-03T05:07:02",
-            FormatEpochTimeInMillisAsIso8601(1315026422 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, Prints24HourTime) {
-  EXPECT_EQ("2011-09-28T17:08:22",
-            FormatEpochTimeInMillisAsIso8601(1317229702 * kMillisPerSec));
-}
-
-TEST_F(FormatEpochTimeInMillisAsIso8601Test, PrintsEpochStart) {
-  EXPECT_EQ("1970-01-01T00:00:00", FormatEpochTimeInMillisAsIso8601(0));
-}
-
-# ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-#  pragma option push -w-ccc -w-rch
-# endif
-
-// Tests that the LHS of EXPECT_EQ or ASSERT_EQ can be used as a null literal
-// when the RHS is a pointer type.
-TEST(NullLiteralTest, LHSAllowsNullLiterals) {
-  EXPECT_EQ(0, static_cast<void*>(nullptr));     // NOLINT
-  ASSERT_EQ(0, static_cast<void*>(nullptr));     // NOLINT
-  EXPECT_EQ(NULL, static_cast<void*>(nullptr));  // NOLINT
-  ASSERT_EQ(NULL, static_cast<void*>(nullptr));  // NOLINT
-  EXPECT_EQ(nullptr, static_cast<void*>(nullptr));
-  ASSERT_EQ(nullptr, static_cast<void*>(nullptr));
-
-  const int* const p = nullptr;
-  EXPECT_EQ(0, p);     // NOLINT
-  ASSERT_EQ(0, p);     // NOLINT
-  EXPECT_EQ(NULL, p);  // NOLINT
-  ASSERT_EQ(NULL, p);  // NOLINT
-  EXPECT_EQ(nullptr, p);
-  ASSERT_EQ(nullptr, p);
-}
-
-struct ConvertToAll {
-  template <typename T>
-  operator T() const {  // NOLINT
-    return T();
-  }
-};
-
-struct ConvertToPointer {
-  template <class T>
-  operator T*() const {  // NOLINT
-    return nullptr;
-  }
-};
-
-struct ConvertToAllButNoPointers {
-  template <typename T,
-            typename std::enable_if<!std::is_pointer<T>::value, int>::type = 0>
-  operator T() const {  // NOLINT
-    return T();
-  }
-};
-
-struct MyType {};
-inline bool operator==(MyType const&, MyType const&) { return true; }
-
-TEST(NullLiteralTest, ImplicitConversion) {
-  EXPECT_EQ(ConvertToPointer{}, static_cast<void*>(nullptr));
-#if !defined(__GNUC__) || defined(__clang__)
-  // Disabled due to GCC bug gcc.gnu.org/PR89580
-  EXPECT_EQ(ConvertToAll{}, static_cast<void*>(nullptr));
-#endif
-  EXPECT_EQ(ConvertToAll{}, MyType{});
-  EXPECT_EQ(ConvertToAllButNoPointers{}, MyType{});
-}
-
-#ifdef __clang__
-#pragma clang diagnostic push
-#if __has_warning("-Wzero-as-null-pointer-constant")
-#pragma clang diagnostic error "-Wzero-as-null-pointer-constant"
-#endif
-#endif
-
-TEST(NullLiteralTest, NoConversionNoWarning) {
-  // Test that gtests detection and handling of null pointer constants
-  // doesn't trigger a warning when '0' isn't actually used as null.
-  EXPECT_EQ(0, 0);
-  ASSERT_EQ(0, 0);
-}
-
-#ifdef __clang__
-#pragma clang diagnostic pop
-#endif
-
-# ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them.
-#  pragma option pop
-# endif
-
-//
-// Tests CodePointToUtf8().
-
-// Tests that the NUL character L'\0' is encoded correctly.
-TEST(CodePointToUtf8Test, CanEncodeNul) {
-  EXPECT_EQ("", CodePointToUtf8(L'\0'));
-}
-
-// Tests that ASCII characters are encoded correctly.
-TEST(CodePointToUtf8Test, CanEncodeAscii) {
-  EXPECT_EQ("a", CodePointToUtf8(L'a'));
-  EXPECT_EQ("Z", CodePointToUtf8(L'Z'));
-  EXPECT_EQ("&", CodePointToUtf8(L'&'));
-  EXPECT_EQ("\x7F", CodePointToUtf8(L'\x7F'));
-}
-
-// Tests that Unicode code-points that have 8 to 11 bits are encoded
-// as 110xxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode8To11Bits) {
-  // 000 1101 0011 => 110-00011 10-010011
-  EXPECT_EQ("\xC3\x93", CodePointToUtf8(L'\xD3'));
-
-  // 101 0111 0110 => 110-10101 10-110110
-  // Some compilers (e.g., GCC on MinGW) cannot handle non-ASCII codepoints
-  // in wide strings and wide chars. In order to accommodate them, we have to
-  // introduce such character constants as integers.
-  EXPECT_EQ("\xD5\xB6",
-            CodePointToUtf8(static_cast<wchar_t>(0x576)));
-}
-
-// Tests that Unicode code-points that have 12 to 16 bits are encoded
-// as 1110xxxx 10xxxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode12To16Bits) {
-  // 0000 1000 1101 0011 => 1110-0000 10-100011 10-010011
-  EXPECT_EQ("\xE0\xA3\x93",
-            CodePointToUtf8(static_cast<wchar_t>(0x8D3)));
-
-  // 1100 0111 0100 1101 => 1110-1100 10-011101 10-001101
-  EXPECT_EQ("\xEC\x9D\x8D",
-            CodePointToUtf8(static_cast<wchar_t>(0xC74D)));
-}
-
-#if !GTEST_WIDE_STRING_USES_UTF16_
-// Tests in this group require a wchar_t to hold > 16 bits, and thus
-// are skipped on Windows, and Cygwin, where a wchar_t is
-// 16-bit wide. This code may not compile on those systems.
-
-// Tests that Unicode code-points that have 17 to 21 bits are encoded
-// as 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx.
-TEST(CodePointToUtf8Test, CanEncode17To21Bits) {
-  // 0 0001 0000 1000 1101 0011 => 11110-000 10-010000 10-100011 10-010011
-  EXPECT_EQ("\xF0\x90\xA3\x93", CodePointToUtf8(L'\x108D3'));
-
-  // 0 0001 0000 0100 0000 0000 => 11110-000 10-010000 10-010000 10-000000
-  EXPECT_EQ("\xF0\x90\x90\x80", CodePointToUtf8(L'\x10400'));
-
-  // 1 0000 1000 0110 0011 0100 => 11110-100 10-001000 10-011000 10-110100
-  EXPECT_EQ("\xF4\x88\x98\xB4", CodePointToUtf8(L'\x108634'));
-}
-
-// Tests that encoding an invalid code-point generates the expected result.
-TEST(CodePointToUtf8Test, CanEncodeInvalidCodePoint) {
-  EXPECT_EQ("(Invalid Unicode 0x1234ABCD)", CodePointToUtf8(L'\x1234ABCD'));
-}
-
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests WideStringToUtf8().
-
-// Tests that the NUL character L'\0' is encoded correctly.
-TEST(WideStringToUtf8Test, CanEncodeNul) {
-  EXPECT_STREQ("", WideStringToUtf8(L"", 0).c_str());
-  EXPECT_STREQ("", WideStringToUtf8(L"", -1).c_str());
-}
-
-// Tests that ASCII strings are encoded correctly.
-TEST(WideStringToUtf8Test, CanEncodeAscii) {
-  EXPECT_STREQ("a", WideStringToUtf8(L"a", 1).c_str());
-  EXPECT_STREQ("ab", WideStringToUtf8(L"ab", 2).c_str());
-  EXPECT_STREQ("a", WideStringToUtf8(L"a", -1).c_str());
-  EXPECT_STREQ("ab", WideStringToUtf8(L"ab", -1).c_str());
-}
-
-// Tests that Unicode code-points that have 8 to 11 bits are encoded
-// as 110xxxxx 10xxxxxx.
-TEST(WideStringToUtf8Test, CanEncode8To11Bits) {
-  // 000 1101 0011 => 110-00011 10-010011
-  EXPECT_STREQ("\xC3\x93", WideStringToUtf8(L"\xD3", 1).c_str());
-  EXPECT_STREQ("\xC3\x93", WideStringToUtf8(L"\xD3", -1).c_str());
-
-  // 101 0111 0110 => 110-10101 10-110110
-  const wchar_t s[] = { 0x576, '\0' };
-  EXPECT_STREQ("\xD5\xB6", WideStringToUtf8(s, 1).c_str());
-  EXPECT_STREQ("\xD5\xB6", WideStringToUtf8(s, -1).c_str());
-}
-
-// Tests that Unicode code-points that have 12 to 16 bits are encoded
-// as 1110xxxx 10xxxxxx 10xxxxxx.
-TEST(WideStringToUtf8Test, CanEncode12To16Bits) {
-  // 0000 1000 1101 0011 => 1110-0000 10-100011 10-010011
-  const wchar_t s1[] = { 0x8D3, '\0' };
-  EXPECT_STREQ("\xE0\xA3\x93", WideStringToUtf8(s1, 1).c_str());
-  EXPECT_STREQ("\xE0\xA3\x93", WideStringToUtf8(s1, -1).c_str());
-
-  // 1100 0111 0100 1101 => 1110-1100 10-011101 10-001101
-  const wchar_t s2[] = { 0xC74D, '\0' };
-  EXPECT_STREQ("\xEC\x9D\x8D", WideStringToUtf8(s2, 1).c_str());
-  EXPECT_STREQ("\xEC\x9D\x8D", WideStringToUtf8(s2, -1).c_str());
-}
-
-// Tests that the conversion stops when the function encounters \0 character.
-TEST(WideStringToUtf8Test, StopsOnNulCharacter) {
-  EXPECT_STREQ("ABC", WideStringToUtf8(L"ABC\0XYZ", 100).c_str());
-}
-
-// Tests that the conversion stops when the function reaches the limit
-// specified by the 'length' parameter.
-TEST(WideStringToUtf8Test, StopsWhenLengthLimitReached) {
-  EXPECT_STREQ("ABC", WideStringToUtf8(L"ABCDEF", 3).c_str());
-}
-
-#if !GTEST_WIDE_STRING_USES_UTF16_
-// Tests that Unicode code-points that have 17 to 21 bits are encoded
-// as 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx. This code may not compile
-// on the systems using UTF-16 encoding.
-TEST(WideStringToUtf8Test, CanEncode17To21Bits) {
-  // 0 0001 0000 1000 1101 0011 => 11110-000 10-010000 10-100011 10-010011
-  EXPECT_STREQ("\xF0\x90\xA3\x93", WideStringToUtf8(L"\x108D3", 1).c_str());
-  EXPECT_STREQ("\xF0\x90\xA3\x93", WideStringToUtf8(L"\x108D3", -1).c_str());
-
-  // 1 0000 1000 0110 0011 0100 => 11110-100 10-001000 10-011000 10-110100
-  EXPECT_STREQ("\xF4\x88\x98\xB4", WideStringToUtf8(L"\x108634", 1).c_str());
-  EXPECT_STREQ("\xF4\x88\x98\xB4", WideStringToUtf8(L"\x108634", -1).c_str());
-}
-
-// Tests that encoding an invalid code-point generates the expected result.
-TEST(WideStringToUtf8Test, CanEncodeInvalidCodePoint) {
-  EXPECT_STREQ("(Invalid Unicode 0xABCDFF)",
-               WideStringToUtf8(L"\xABCDFF", -1).c_str());
-}
-#else  // !GTEST_WIDE_STRING_USES_UTF16_
-// Tests that surrogate pairs are encoded correctly on the systems using
-// UTF-16 encoding in the wide strings.
-TEST(WideStringToUtf8Test, CanEncodeValidUtf16SUrrogatePairs) {
-  const wchar_t s[] = { 0xD801, 0xDC00, '\0' };
-  EXPECT_STREQ("\xF0\x90\x90\x80", WideStringToUtf8(s, -1).c_str());
-}
-
-// Tests that encoding an invalid UTF-16 surrogate pair
-// generates the expected result.
-TEST(WideStringToUtf8Test, CanEncodeInvalidUtf16SurrogatePair) {
-  // Leading surrogate is at the end of the string.
-  const wchar_t s1[] = { 0xD800, '\0' };
-  EXPECT_STREQ("\xED\xA0\x80", WideStringToUtf8(s1, -1).c_str());
-  // Leading surrogate is not followed by the trailing surrogate.
-  const wchar_t s2[] = { 0xD800, 'M', '\0' };
-  EXPECT_STREQ("\xED\xA0\x80M", WideStringToUtf8(s2, -1).c_str());
-  // Trailing surrogate appearas without a leading surrogate.
-  const wchar_t s3[] = { 0xDC00, 'P', 'Q', 'R', '\0' };
-  EXPECT_STREQ("\xED\xB0\x80PQR", WideStringToUtf8(s3, -1).c_str());
-}
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests that codepoint concatenation works correctly.
-#if !GTEST_WIDE_STRING_USES_UTF16_
-TEST(WideStringToUtf8Test, ConcatenatesCodepointsCorrectly) {
-  const wchar_t s[] = { 0x108634, 0xC74D, '\n', 0x576, 0x8D3, 0x108634, '\0'};
-  EXPECT_STREQ(
-      "\xF4\x88\x98\xB4"
-          "\xEC\x9D\x8D"
-          "\n"
-          "\xD5\xB6"
-          "\xE0\xA3\x93"
-          "\xF4\x88\x98\xB4",
-      WideStringToUtf8(s, -1).c_str());
-}
-#else
-TEST(WideStringToUtf8Test, ConcatenatesCodepointsCorrectly) {
-  const wchar_t s[] = { 0xC74D, '\n', 0x576, 0x8D3, '\0'};
-  EXPECT_STREQ(
-      "\xEC\x9D\x8D" "\n" "\xD5\xB6" "\xE0\xA3\x93",
-      WideStringToUtf8(s, -1).c_str());
-}
-#endif  // !GTEST_WIDE_STRING_USES_UTF16_
-
-// Tests the Random class.
-
-TEST(RandomDeathTest, GeneratesCrashesOnInvalidRange) {
-  testing::internal::Random random(42);
-  EXPECT_DEATH_IF_SUPPORTED(
-      random.Generate(0),
-      "Cannot generate a number in the range \\[0, 0\\)");
-  EXPECT_DEATH_IF_SUPPORTED(
-      random.Generate(testing::internal::Random::kMaxRange + 1),
-      "Generation of a number in \\[0, 2147483649\\) was requested, "
-      "but this can only generate numbers in \\[0, 2147483648\\)");
-}
-
-TEST(RandomTest, GeneratesNumbersWithinRange) {
-  const UInt32 kRange = 10000;
-  testing::internal::Random random(12345);
-  for (int i = 0; i < 10; i++) {
-    EXPECT_LT(random.Generate(kRange), kRange) << " for iteration " << i;
-  }
-
-  testing::internal::Random random2(testing::internal::Random::kMaxRange);
-  for (int i = 0; i < 10; i++) {
-    EXPECT_LT(random2.Generate(kRange), kRange) << " for iteration " << i;
-  }
-}
-
-TEST(RandomTest, RepeatsWhenReseeded) {
-  const int kSeed = 123;
-  const int kArraySize = 10;
-  const UInt32 kRange = 10000;
-  UInt32 values[kArraySize];
-
-  testing::internal::Random random(kSeed);
-  for (int i = 0; i < kArraySize; i++) {
-    values[i] = random.Generate(kRange);
-  }
-
-  random.Reseed(kSeed);
-  for (int i = 0; i < kArraySize; i++) {
-    EXPECT_EQ(values[i], random.Generate(kRange)) << " for iteration " << i;
-  }
-}
-
-// Tests STL container utilities.
-
-// Tests CountIf().
-
-static bool IsPositive(int n) { return n > 0; }
-
-TEST(ContainerUtilityTest, CountIf) {
-  std::vector<int> v;
-  EXPECT_EQ(0, CountIf(v, IsPositive));  // Works for an empty container.
-
-  v.push_back(-1);
-  v.push_back(0);
-  EXPECT_EQ(0, CountIf(v, IsPositive));  // Works when no value satisfies.
-
-  v.push_back(2);
-  v.push_back(-10);
-  v.push_back(10);
-  EXPECT_EQ(2, CountIf(v, IsPositive));
-}
-
-// Tests ForEach().
-
-static int g_sum = 0;
-static void Accumulate(int n) { g_sum += n; }
-
-TEST(ContainerUtilityTest, ForEach) {
-  std::vector<int> v;
-  g_sum = 0;
-  ForEach(v, Accumulate);
-  EXPECT_EQ(0, g_sum);  // Works for an empty container;
-
-  g_sum = 0;
-  v.push_back(1);
-  ForEach(v, Accumulate);
-  EXPECT_EQ(1, g_sum);  // Works for a container with one element.
-
-  g_sum = 0;
-  v.push_back(20);
-  v.push_back(300);
-  ForEach(v, Accumulate);
-  EXPECT_EQ(321, g_sum);
-}
-
-// Tests GetElementOr().
-TEST(ContainerUtilityTest, GetElementOr) {
-  std::vector<char> a;
-  EXPECT_EQ('x', GetElementOr(a, 0, 'x'));
-
-  a.push_back('a');
-  a.push_back('b');
-  EXPECT_EQ('a', GetElementOr(a, 0, 'x'));
-  EXPECT_EQ('b', GetElementOr(a, 1, 'x'));
-  EXPECT_EQ('x', GetElementOr(a, -2, 'x'));
-  EXPECT_EQ('x', GetElementOr(a, 2, 'x'));
-}
-
-TEST(ContainerUtilityDeathTest, ShuffleRange) {
-  std::vector<int> a;
-  a.push_back(0);
-  a.push_back(1);
-  a.push_back(2);
-  testing::internal::Random random(1);
-
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, -1, 1, &a),
-      "Invalid shuffle range start -1: must be in range \\[0, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 4, 4, &a),
-      "Invalid shuffle range start 4: must be in range \\[0, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 3, 2, &a),
-      "Invalid shuffle range finish 2: must be in range \\[3, 3\\]");
-  EXPECT_DEATH_IF_SUPPORTED(
-      ShuffleRange(&random, 3, 4, &a),
-      "Invalid shuffle range finish 4: must be in range \\[3, 3\\]");
-}
-
-class VectorShuffleTest : public Test {
- protected:
-  static const size_t kVectorSize = 20;
-
-  VectorShuffleTest() : random_(1) {
-    for (int i = 0; i < static_cast<int>(kVectorSize); i++) {
-      vector_.push_back(i);
-    }
-  }
-
-  static bool VectorIsCorrupt(const TestingVector& vector) {
-    if (kVectorSize != vector.size()) {
-      return true;
-    }
-
-    bool found_in_vector[kVectorSize] = { false };
-    for (size_t i = 0; i < vector.size(); i++) {
-      const int e = vector[i];
-      if (e < 0 || e >= static_cast<int>(kVectorSize) || found_in_vector[e]) {
-        return true;
-      }
-      found_in_vector[e] = true;
-    }
-
-    // Vector size is correct, elements' range is correct, no
-    // duplicate elements.  Therefore no corruption has occurred.
-    return false;
-  }
-
-  static bool VectorIsNotCorrupt(const TestingVector& vector) {
-    return !VectorIsCorrupt(vector);
-  }
-
-  static bool RangeIsShuffled(const TestingVector& vector, int begin, int end) {
-    for (int i = begin; i < end; i++) {
-      if (i != vector[static_cast<size_t>(i)]) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  static bool RangeIsUnshuffled(
-      const TestingVector& vector, int begin, int end) {
-    return !RangeIsShuffled(vector, begin, end);
-  }
-
-  static bool VectorIsShuffled(const TestingVector& vector) {
-    return RangeIsShuffled(vector, 0, static_cast<int>(vector.size()));
-  }
-
-  static bool VectorIsUnshuffled(const TestingVector& vector) {
-    return !VectorIsShuffled(vector);
-  }
-
-  testing::internal::Random random_;
-  TestingVector vector_;
-};  // class VectorShuffleTest
-
-const size_t VectorShuffleTest::kVectorSize;
-
-TEST_F(VectorShuffleTest, HandlesEmptyRange) {
-  // Tests an empty range at the beginning...
-  ShuffleRange(&random_, 0, 0, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...in the middle...
-  ShuffleRange(&random_, kVectorSize/2, kVectorSize/2, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...at the end...
-  ShuffleRange(&random_, kVectorSize - 1, kVectorSize - 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...and past the end.
-  ShuffleRange(&random_, kVectorSize, kVectorSize, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-}
-
-TEST_F(VectorShuffleTest, HandlesRangeOfSizeOne) {
-  // Tests a size one range at the beginning...
-  ShuffleRange(&random_, 0, 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...in the middle...
-  ShuffleRange(&random_, kVectorSize/2, kVectorSize/2 + 1, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-
-  // ...and at the end.
-  ShuffleRange(&random_, kVectorSize - 1, kVectorSize, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsUnshuffled, vector_);
-}
-
-// Because we use our own random number generator and a fixed seed,
-// we can guarantee that the following "random" tests will succeed.
-
-TEST_F(VectorShuffleTest, ShufflesEntireVector) {
-  Shuffle(&random_, &vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_FALSE(VectorIsUnshuffled(vector_)) << vector_;
-
-  // Tests the first and last elements in particular to ensure that
-  // there are no off-by-one problems in our shuffle algorithm.
-  EXPECT_NE(0, vector_[0]);
-  EXPECT_NE(static_cast<int>(kVectorSize - 1), vector_[kVectorSize - 1]);
-}
-
-TEST_F(VectorShuffleTest, ShufflesStartOfVector) {
-  const int kRangeSize = kVectorSize/2;
-
-  ShuffleRange(&random_, 0, kRangeSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsShuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesEndOfVector) {
-  const int kRangeSize = kVectorSize / 2;
-  ShuffleRange(&random_, kRangeSize, kVectorSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsShuffled, vector_, kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesMiddleOfVector) {
-  const int kRangeSize = static_cast<int>(kVectorSize) / 3;
-  ShuffleRange(&random_, kRangeSize, 2*kRangeSize, &vector_);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 0, kRangeSize);
-  EXPECT_PRED3(RangeIsShuffled, vector_, kRangeSize, 2*kRangeSize);
-  EXPECT_PRED3(RangeIsUnshuffled, vector_, 2 * kRangeSize,
-               static_cast<int>(kVectorSize));
-}
-
-TEST_F(VectorShuffleTest, ShufflesRepeatably) {
-  TestingVector vector2;
-  for (size_t i = 0; i < kVectorSize; i++) {
-    vector2.push_back(static_cast<int>(i));
-  }
-
-  random_.Reseed(1234);
-  Shuffle(&random_, &vector_);
-  random_.Reseed(1234);
-  Shuffle(&random_, &vector2);
-
-  ASSERT_PRED1(VectorIsNotCorrupt, vector_);
-  ASSERT_PRED1(VectorIsNotCorrupt, vector2);
-
-  for (size_t i = 0; i < kVectorSize; i++) {
-    EXPECT_EQ(vector_[i], vector2[i]) << " where i is " << i;
-  }
-}
-
-// Tests the size of the AssertHelper class.
-
-TEST(AssertHelperTest, AssertHelperIsSmall) {
-  // To avoid breaking clients that use lots of assertions in one
-  // function, we cannot grow the size of AssertHelper.
-  EXPECT_LE(sizeof(testing::internal::AssertHelper), sizeof(void*));
-}
-
-// Tests String::EndsWithCaseInsensitive().
-TEST(StringTest, EndsWithCaseInsensitive) {
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobar", "BAR"));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobaR", "bar"));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("foobar", ""));
-  EXPECT_TRUE(String::EndsWithCaseInsensitive("", ""));
-
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("Foobar", "foo"));
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("foobar", "Foo"));
-  EXPECT_FALSE(String::EndsWithCaseInsensitive("", "foo"));
-}
-
-// C++Builder's preprocessor is buggy; it fails to expand macros that
-// appear in macro parameters after wide char literals.  Provide an alias
-// for NULL as a workaround.
-static const wchar_t* const kNull = nullptr;
-
-// Tests String::CaseInsensitiveWideCStringEquals
-TEST(StringTest, CaseInsensitiveWideCStringEquals) {
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(nullptr, nullptr));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(kNull, L""));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(L"", kNull));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(kNull, L"foobar"));
-  EXPECT_FALSE(String::CaseInsensitiveWideCStringEquals(L"foobar", kNull));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"foobar", L"foobar"));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"foobar", L"FOOBAR"));
-  EXPECT_TRUE(String::CaseInsensitiveWideCStringEquals(L"FOOBAR", L"foobar"));
-}
-
-#if GTEST_OS_WINDOWS
-
-// Tests String::ShowWideCString().
-TEST(StringTest, ShowWideCString) {
-  EXPECT_STREQ("(null)",
-               String::ShowWideCString(NULL).c_str());
-  EXPECT_STREQ("", String::ShowWideCString(L"").c_str());
-  EXPECT_STREQ("foo", String::ShowWideCString(L"foo").c_str());
-}
-
-# if GTEST_OS_WINDOWS_MOBILE
-TEST(StringTest, AnsiAndUtf16Null) {
-  EXPECT_EQ(NULL, String::AnsiToUtf16(NULL));
-  EXPECT_EQ(NULL, String::Utf16ToAnsi(NULL));
-}
-
-TEST(StringTest, AnsiAndUtf16ConvertBasic) {
-  const char* ansi = String::Utf16ToAnsi(L"str");
-  EXPECT_STREQ("str", ansi);
-  delete [] ansi;
-  const WCHAR* utf16 = String::AnsiToUtf16("str");
-  EXPECT_EQ(0, wcsncmp(L"str", utf16, 3));
-  delete [] utf16;
-}
-
-TEST(StringTest, AnsiAndUtf16ConvertPathChars) {
-  const char* ansi = String::Utf16ToAnsi(L".:\\ \"*?");
-  EXPECT_STREQ(".:\\ \"*?", ansi);
-  delete [] ansi;
-  const WCHAR* utf16 = String::AnsiToUtf16(".:\\ \"*?");
-  EXPECT_EQ(0, wcsncmp(L".:\\ \"*?", utf16, 3));
-  delete [] utf16;
-}
-# endif  // GTEST_OS_WINDOWS_MOBILE
-
-#endif  // GTEST_OS_WINDOWS
-
-// Tests TestProperty construction.
-TEST(TestPropertyTest, StringValue) {
-  TestProperty property("key", "1");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("1", property.value());
-}
-
-// Tests TestProperty replacing a value.
-TEST(TestPropertyTest, ReplaceStringValue) {
-  TestProperty property("key", "1");
-  EXPECT_STREQ("1", property.value());
-  property.SetValue("2");
-  EXPECT_STREQ("2", property.value());
-}
-
-// AddFatalFailure() and AddNonfatalFailure() must be stand-alone
-// functions (i.e. their definitions cannot be inlined at the call
-// sites), or C++Builder won't compile the code.
-static void AddFatalFailure() {
-  FAIL() << "Expected fatal failure.";
-}
-
-static void AddNonfatalFailure() {
-  ADD_FAILURE() << "Expected non-fatal failure.";
-}
-
-class ScopedFakeTestPartResultReporterTest : public Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  enum FailureMode {
-    FATAL_FAILURE,
-    NONFATAL_FAILURE
-  };
-  static void AddFailure(FailureMode failure) {
-    if (failure == FATAL_FAILURE) {
-      AddFatalFailure();
-    } else {
-      AddNonfatalFailure();
-    }
-  }
-};
-
-// Tests that ScopedFakeTestPartResultReporter intercepts test
-// failures.
-TEST_F(ScopedFakeTestPartResultReporterTest, InterceptsTestFailures) {
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ONLY_CURRENT_THREAD,
-        &results);
-    AddFailure(NONFATAL_FAILURE);
-    AddFailure(FATAL_FAILURE);
-  }
-
-  EXPECT_EQ(2, results.size());
-  EXPECT_TRUE(results.GetTestPartResult(0).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(1).fatally_failed());
-}
-
-TEST_F(ScopedFakeTestPartResultReporterTest, DeprecatedConstructor) {
-  TestPartResultArray results;
-  {
-    // Tests, that the deprecated constructor still works.
-    ScopedFakeTestPartResultReporter reporter(&results);
-    AddFailure(NONFATAL_FAILURE);
-  }
-  EXPECT_EQ(1, results.size());
-}
-
-#if GTEST_IS_THREADSAFE
-
-class ScopedFakeTestPartResultReporterWithThreadsTest
-  : public ScopedFakeTestPartResultReporterTest {
- protected:
-  static void AddFailureInOtherThread(FailureMode failure) {
-    ThreadWithParam<FailureMode> thread(&AddFailure, failure, nullptr);
-    thread.Join();
-  }
-};
-
-TEST_F(ScopedFakeTestPartResultReporterWithThreadsTest,
-       InterceptsTestFailuresInAllThreads) {
-  TestPartResultArray results;
-  {
-    ScopedFakeTestPartResultReporter reporter(
-        ScopedFakeTestPartResultReporter::INTERCEPT_ALL_THREADS, &results);
-    AddFailure(NONFATAL_FAILURE);
-    AddFailure(FATAL_FAILURE);
-    AddFailureInOtherThread(NONFATAL_FAILURE);
-    AddFailureInOtherThread(FATAL_FAILURE);
-  }
-
-  EXPECT_EQ(4, results.size());
-  EXPECT_TRUE(results.GetTestPartResult(0).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(1).fatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(2).nonfatally_failed());
-  EXPECT_TRUE(results.GetTestPartResult(3).fatally_failed());
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests EXPECT_FATAL_FAILURE{,ON_ALL_THREADS}.  Makes sure that they
-// work even if the failure is generated in a called function rather than
-// the current context.
-
-typedef ScopedFakeTestPartResultReporterTest ExpectFatalFailureTest;
-
-TEST_F(ExpectFatalFailureTest, CatchesFatalFaliure) {
-  EXPECT_FATAL_FAILURE(AddFatalFailure(), "Expected fatal failure.");
-}
-
-TEST_F(ExpectFatalFailureTest, AcceptsStdStringObject) {
-  EXPECT_FATAL_FAILURE(AddFatalFailure(),
-                       ::std::string("Expected fatal failure."));
-}
-
-TEST_F(ExpectFatalFailureTest, CatchesFatalFailureOnAllThreads) {
-  // We have another test below to verify that the macro catches fatal
-  // failures generated on another thread.
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFatalFailure(),
-                                      "Expected fatal failure.");
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true"
-# pragma option push -w-ccc
-#endif
-
-// Tests that EXPECT_FATAL_FAILURE() can be used in a non-void
-// function even when the statement in it contains ASSERT_*.
-
-int NonVoidFunction() {
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false), "");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(FAIL(), "");
-  return 0;
-}
-
-TEST_F(ExpectFatalFailureTest, CanBeUsedInNonVoidFunction) {
-  NonVoidFunction();
-}
-
-// Tests that EXPECT_FATAL_FAILURE(statement, ...) doesn't abort the
-// current function even though 'statement' generates a fatal failure.
-
-void DoesNotAbortHelper(bool* aborted) {
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false), "");
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(FAIL(), "");
-
-  *aborted = false;
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them.
-# pragma option pop
-#endif
-
-TEST_F(ExpectFatalFailureTest, DoesNotAbort) {
-  bool aborted = true;
-  DoesNotAbortHelper(&aborted);
-  EXPECT_FALSE(aborted);
-}
-
-// Tests that the EXPECT_FATAL_FAILURE{,_ON_ALL_THREADS} accepts a
-// statement that contains a macro which expands to code containing an
-// unprotected comma.
-
-static int global_var = 0;
-#define GTEST_USE_UNPROTECTED_COMMA_ global_var++, global_var++
-
-TEST_F(ExpectFatalFailureTest, AcceptsMacroThatExpandsToUnprotectedComma) {
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddFatalFailure();
-  }, "");
-#endif
-
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddFatalFailure();
-  }, "");
-}
-
-// Tests EXPECT_NONFATAL_FAILURE{,ON_ALL_THREADS}.
-
-typedef ScopedFakeTestPartResultReporterTest ExpectNonfatalFailureTest;
-
-TEST_F(ExpectNonfatalFailureTest, CatchesNonfatalFailure) {
-  EXPECT_NONFATAL_FAILURE(AddNonfatalFailure(),
-                          "Expected non-fatal failure.");
-}
-
-TEST_F(ExpectNonfatalFailureTest, AcceptsStdStringObject) {
-  EXPECT_NONFATAL_FAILURE(AddNonfatalFailure(),
-                          ::std::string("Expected non-fatal failure."));
-}
-
-TEST_F(ExpectNonfatalFailureTest, CatchesNonfatalFailureOnAllThreads) {
-  // We have another test below to verify that the macro catches
-  // non-fatal failures generated on another thread.
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(AddNonfatalFailure(),
-                                         "Expected non-fatal failure.");
-}
-
-// Tests that the EXPECT_NONFATAL_FAILURE{,_ON_ALL_THREADS} accepts a
-// statement that contains a macro which expands to code containing an
-// unprotected comma.
-TEST_F(ExpectNonfatalFailureTest, AcceptsMacroThatExpandsToUnprotectedComma) {
-  EXPECT_NONFATAL_FAILURE({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddNonfatalFailure();
-  }, "");
-
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS({
-    GTEST_USE_UNPROTECTED_COMMA_;
-    AddNonfatalFailure();
-  }, "");
-}
-
-#if GTEST_IS_THREADSAFE
-
-typedef ScopedFakeTestPartResultReporterWithThreadsTest
-    ExpectFailureWithThreadsTest;
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectFatalFailureOnAllThreads) {
-  EXPECT_FATAL_FAILURE_ON_ALL_THREADS(AddFailureInOtherThread(FATAL_FAILURE),
-                                      "Expected fatal failure.");
-}
-
-TEST_F(ExpectFailureWithThreadsTest, ExpectNonFatalFailureOnAllThreads) {
-  EXPECT_NONFATAL_FAILURE_ON_ALL_THREADS(
-      AddFailureInOtherThread(NONFATAL_FAILURE), "Expected non-fatal failure.");
-}
-
-#endif  // GTEST_IS_THREADSAFE
-
-// Tests the TestProperty class.
-
-TEST(TestPropertyTest, ConstructorWorks) {
-  const TestProperty property("key", "value");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("value", property.value());
-}
-
-TEST(TestPropertyTest, SetValue) {
-  TestProperty property("key", "value_1");
-  EXPECT_STREQ("key", property.key());
-  property.SetValue("value_2");
-  EXPECT_STREQ("key", property.key());
-  EXPECT_STREQ("value_2", property.value());
-}
-
-// Tests the TestResult class
-
-// The test fixture for testing TestResult.
-class TestResultTest : public Test {
- protected:
-  typedef std::vector<TestPartResult> TPRVector;
-
-  // We make use of 2 TestPartResult objects,
-  TestPartResult * pr1, * pr2;
-
-  // ... and 3 TestResult objects.
-  TestResult * r0, * r1, * r2;
-
-  void SetUp() override {
-    // pr1 is for success.
-    pr1 = new TestPartResult(TestPartResult::kSuccess,
-                             "foo/bar.cc",
-                             10,
-                             "Success!");
-
-    // pr2 is for fatal failure.
-    pr2 = new TestPartResult(TestPartResult::kFatalFailure,
-                             "foo/bar.cc",
-                             -1,  // This line number means "unknown"
-                             "Failure!");
-
-    // Creates the TestResult objects.
-    r0 = new TestResult();
-    r1 = new TestResult();
-    r2 = new TestResult();
-
-    // In order to test TestResult, we need to modify its internal
-    // state, in particular the TestPartResult vector it holds.
-    // test_part_results() returns a const reference to this vector.
-    // We cast it to a non-const object s.t. it can be modified
-    TPRVector* results1 = const_cast<TPRVector*>(
-        &TestResultAccessor::test_part_results(*r1));
-    TPRVector* results2 = const_cast<TPRVector*>(
-        &TestResultAccessor::test_part_results(*r2));
-
-    // r0 is an empty TestResult.
-
-    // r1 contains a single SUCCESS TestPartResult.
-    results1->push_back(*pr1);
-
-    // r2 contains a SUCCESS, and a FAILURE.
-    results2->push_back(*pr1);
-    results2->push_back(*pr2);
-  }
-
-  void TearDown() override {
-    delete pr1;
-    delete pr2;
-
-    delete r0;
-    delete r1;
-    delete r2;
-  }
-
-  // Helper that compares two TestPartResults.
-  static void CompareTestPartResult(const TestPartResult& expected,
-                                    const TestPartResult& actual) {
-    EXPECT_EQ(expected.type(), actual.type());
-    EXPECT_STREQ(expected.file_name(), actual.file_name());
-    EXPECT_EQ(expected.line_number(), actual.line_number());
-    EXPECT_STREQ(expected.summary(), actual.summary());
-    EXPECT_STREQ(expected.message(), actual.message());
-    EXPECT_EQ(expected.passed(), actual.passed());
-    EXPECT_EQ(expected.failed(), actual.failed());
-    EXPECT_EQ(expected.nonfatally_failed(), actual.nonfatally_failed());
-    EXPECT_EQ(expected.fatally_failed(), actual.fatally_failed());
-  }
-};
-
-// Tests TestResult::total_part_count().
-TEST_F(TestResultTest, total_part_count) {
-  ASSERT_EQ(0, r0->total_part_count());
-  ASSERT_EQ(1, r1->total_part_count());
-  ASSERT_EQ(2, r2->total_part_count());
-}
-
-// Tests TestResult::Passed().
-TEST_F(TestResultTest, Passed) {
-  ASSERT_TRUE(r0->Passed());
-  ASSERT_TRUE(r1->Passed());
-  ASSERT_FALSE(r2->Passed());
-}
-
-// Tests TestResult::Failed().
-TEST_F(TestResultTest, Failed) {
-  ASSERT_FALSE(r0->Failed());
-  ASSERT_FALSE(r1->Failed());
-  ASSERT_TRUE(r2->Failed());
-}
-
-// Tests TestResult::GetTestPartResult().
-
-typedef TestResultTest TestResultDeathTest;
-
-TEST_F(TestResultDeathTest, GetTestPartResult) {
-  CompareTestPartResult(*pr1, r2->GetTestPartResult(0));
-  CompareTestPartResult(*pr2, r2->GetTestPartResult(1));
-  EXPECT_DEATH_IF_SUPPORTED(r2->GetTestPartResult(2), "");
-  EXPECT_DEATH_IF_SUPPORTED(r2->GetTestPartResult(-1), "");
-}
-
-// Tests TestResult has no properties when none are added.
-TEST(TestResultPropertyTest, NoPropertiesFoundWhenNoneAreAdded) {
-  TestResult test_result;
-  ASSERT_EQ(0, test_result.test_property_count());
-}
-
-// Tests TestResult has the expected property when added.
-TEST(TestResultPropertyTest, OnePropertyFoundWhenAdded) {
-  TestResult test_result;
-  TestProperty property("key_1", "1");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property);
-  ASSERT_EQ(1, test_result.test_property_count());
-  const TestProperty& actual_property = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property.key());
-  EXPECT_STREQ("1", actual_property.value());
-}
-
-// Tests TestResult has multiple properties when added.
-TEST(TestResultPropertyTest, MultiplePropertiesFoundWhenAdded) {
-  TestResult test_result;
-  TestProperty property_1("key_1", "1");
-  TestProperty property_2("key_2", "2");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2);
-  ASSERT_EQ(2, test_result.test_property_count());
-  const TestProperty& actual_property_1 = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property_1.key());
-  EXPECT_STREQ("1", actual_property_1.value());
-
-  const TestProperty& actual_property_2 = test_result.GetTestProperty(1);
-  EXPECT_STREQ("key_2", actual_property_2.key());
-  EXPECT_STREQ("2", actual_property_2.value());
-}
-
-// Tests TestResult::RecordProperty() overrides values for duplicate keys.
-TEST(TestResultPropertyTest, OverridesValuesForDuplicateKeys) {
-  TestResult test_result;
-  TestProperty property_1_1("key_1", "1");
-  TestProperty property_2_1("key_2", "2");
-  TestProperty property_1_2("key_1", "12");
-  TestProperty property_2_2("key_2", "22");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1_2);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2_2);
-
-  ASSERT_EQ(2, test_result.test_property_count());
-  const TestProperty& actual_property_1 = test_result.GetTestProperty(0);
-  EXPECT_STREQ("key_1", actual_property_1.key());
-  EXPECT_STREQ("12", actual_property_1.value());
-
-  const TestProperty& actual_property_2 = test_result.GetTestProperty(1);
-  EXPECT_STREQ("key_2", actual_property_2.key());
-  EXPECT_STREQ("22", actual_property_2.value());
-}
-
-// Tests TestResult::GetTestProperty().
-TEST(TestResultPropertyTest, GetTestProperty) {
-  TestResult test_result;
-  TestProperty property_1("key_1", "1");
-  TestProperty property_2("key_2", "2");
-  TestProperty property_3("key_3", "3");
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_1);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_2);
-  TestResultAccessor::RecordProperty(&test_result, "testcase", property_3);
-
-  const TestProperty& fetched_property_1 = test_result.GetTestProperty(0);
-  const TestProperty& fetched_property_2 = test_result.GetTestProperty(1);
-  const TestProperty& fetched_property_3 = test_result.GetTestProperty(2);
-
-  EXPECT_STREQ("key_1", fetched_property_1.key());
-  EXPECT_STREQ("1", fetched_property_1.value());
-
-  EXPECT_STREQ("key_2", fetched_property_2.key());
-  EXPECT_STREQ("2", fetched_property_2.value());
-
-  EXPECT_STREQ("key_3", fetched_property_3.key());
-  EXPECT_STREQ("3", fetched_property_3.value());
-
-  EXPECT_DEATH_IF_SUPPORTED(test_result.GetTestProperty(3), "");
-  EXPECT_DEATH_IF_SUPPORTED(test_result.GetTestProperty(-1), "");
-}
-
-// Tests the Test class.
-//
-// It's difficult to test every public method of this class (we are
-// already stretching the limit of Google Test by using it to test itself!).
-// Fortunately, we don't have to do that, as we are already testing
-// the functionalities of the Test class extensively by using Google Test
-// alone.
-//
-// Therefore, this section only contains one test.
-
-// Tests that GTestFlagSaver works on Windows and Mac.
-
-class GTestFlagSaverTest : public Test {
- protected:
-  // Saves the Google Test flags such that we can restore them later, and
-  // then sets them to their default values.  This will be called
-  // before the first test in this test case is run.
-  static void SetUpTestSuite() {
-    saver_ = new GTestFlagSaver;
-
-    GTEST_FLAG(also_run_disabled_tests) = false;
-    GTEST_FLAG(break_on_failure) = false;
-    GTEST_FLAG(catch_exceptions) = false;
-    GTEST_FLAG(death_test_use_fork) = false;
-    GTEST_FLAG(color) = "auto";
-    GTEST_FLAG(filter) = "";
-    GTEST_FLAG(list_tests) = false;
-    GTEST_FLAG(output) = "";
-    GTEST_FLAG(print_time) = true;
-    GTEST_FLAG(random_seed) = 0;
-    GTEST_FLAG(repeat) = 1;
-    GTEST_FLAG(shuffle) = false;
-    GTEST_FLAG(stack_trace_depth) = kMaxStackTraceDepth;
-    GTEST_FLAG(stream_result_to) = "";
-    GTEST_FLAG(throw_on_failure) = false;
-  }
-
-  // Restores the Google Test flags that the tests have modified.  This will
-  // be called after the last test in this test case is run.
-  static void TearDownTestSuite() {
-    delete saver_;
-    saver_ = nullptr;
-  }
-
-  // Verifies that the Google Test flags have their default values, and then
-  // modifies each of them.
-  void VerifyAndModifyFlags() {
-    EXPECT_FALSE(GTEST_FLAG(also_run_disabled_tests));
-    EXPECT_FALSE(GTEST_FLAG(break_on_failure));
-    EXPECT_FALSE(GTEST_FLAG(catch_exceptions));
-    EXPECT_STREQ("auto", GTEST_FLAG(color).c_str());
-    EXPECT_FALSE(GTEST_FLAG(death_test_use_fork));
-    EXPECT_STREQ("", GTEST_FLAG(filter).c_str());
-    EXPECT_FALSE(GTEST_FLAG(list_tests));
-    EXPECT_STREQ("", GTEST_FLAG(output).c_str());
-    EXPECT_TRUE(GTEST_FLAG(print_time));
-    EXPECT_EQ(0, GTEST_FLAG(random_seed));
-    EXPECT_EQ(1, GTEST_FLAG(repeat));
-    EXPECT_FALSE(GTEST_FLAG(shuffle));
-    EXPECT_EQ(kMaxStackTraceDepth, GTEST_FLAG(stack_trace_depth));
-    EXPECT_STREQ("", GTEST_FLAG(stream_result_to).c_str());
-    EXPECT_FALSE(GTEST_FLAG(throw_on_failure));
-
-    GTEST_FLAG(also_run_disabled_tests) = true;
-    GTEST_FLAG(break_on_failure) = true;
-    GTEST_FLAG(catch_exceptions) = true;
-    GTEST_FLAG(color) = "no";
-    GTEST_FLAG(death_test_use_fork) = true;
-    GTEST_FLAG(filter) = "abc";
-    GTEST_FLAG(list_tests) = true;
-    GTEST_FLAG(output) = "xml:foo.xml";
-    GTEST_FLAG(print_time) = false;
-    GTEST_FLAG(random_seed) = 1;
-    GTEST_FLAG(repeat) = 100;
-    GTEST_FLAG(shuffle) = true;
-    GTEST_FLAG(stack_trace_depth) = 1;
-    GTEST_FLAG(stream_result_to) = "localhost:1234";
-    GTEST_FLAG(throw_on_failure) = true;
-  }
-
- private:
-  // For saving Google Test flags during this test case.
-  static GTestFlagSaver* saver_;
-};
-
-GTestFlagSaver* GTestFlagSaverTest::saver_ = nullptr;
-
-// Google Test doesn't guarantee the order of tests.  The following two
-// tests are designed to work regardless of their order.
-
-// Modifies the Google Test flags in the test body.
-TEST_F(GTestFlagSaverTest, ModifyGTestFlags) {
-  VerifyAndModifyFlags();
-}
-
-// Verifies that the Google Test flags in the body of the previous test were
-// restored to their original values.
-TEST_F(GTestFlagSaverTest, VerifyGTestFlags) {
-  VerifyAndModifyFlags();
-}
-
-// Sets an environment variable with the given name to the given
-// value.  If the value argument is "", unsets the environment
-// variable.  The caller must ensure that both arguments are not NULL.
-static void SetEnv(const char* name, const char* value) {
-#if GTEST_OS_WINDOWS_MOBILE
-  // Environment variables are not supported on Windows CE.
-  return;
-#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
-  // C++Builder's putenv only stores a pointer to its parameter; we have to
-  // ensure that the string remains valid as long as it might be needed.
-  // We use an std::map to do so.
-  static std::map<std::string, std::string*> added_env;
-
-  // Because putenv stores a pointer to the string buffer, we can't delete the
-  // previous string (if present) until after it's replaced.
-  std::string *prev_env = NULL;
-  if (added_env.find(name) != added_env.end()) {
-    prev_env = added_env[name];
-  }
-  added_env[name] = new std::string(
-      (Message() << name << "=" << value).GetString());
-
-  // The standard signature of putenv accepts a 'char*' argument. Other
-  // implementations, like C++Builder's, accept a 'const char*'.
-  // We cast away the 'const' since that would work for both variants.
-  putenv(const_cast<char*>(added_env[name]->c_str()));
-  delete prev_env;
-#elif GTEST_OS_WINDOWS  // If we are on Windows proper.
-  _putenv((Message() << name << "=" << value).GetString().c_str());
-#else
-  if (*value == '\0') {
-    unsetenv(name);
-  } else {
-    setenv(name, value, 1);
-  }
-#endif  // GTEST_OS_WINDOWS_MOBILE
-}
-
-#if !GTEST_OS_WINDOWS_MOBILE
-// Environment variables are not supported on Windows CE.
-
-using testing::internal::Int32FromGTestEnv;
-
-// Tests Int32FromGTestEnv().
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable is not set.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenVariableIsNotSet) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "");
-  EXPECT_EQ(10, Int32FromGTestEnv("temp", 10));
-}
-
-# if !defined(GTEST_GET_INT32_FROM_ENV_)
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable overflows as an Int32.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenValueOverflows) {
-  printf("(expecting 2 warnings)\n");
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "12345678987654321");
-  EXPECT_EQ(20, Int32FromGTestEnv("temp", 20));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "-12345678987654321");
-  EXPECT_EQ(30, Int32FromGTestEnv("temp", 30));
-}
-
-// Tests that Int32FromGTestEnv() returns the default value when the
-// environment variable does not represent a valid decimal integer.
-TEST(Int32FromGTestEnvTest, ReturnsDefaultWhenValueIsInvalid) {
-  printf("(expecting 2 warnings)\n");
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "A1");
-  EXPECT_EQ(40, Int32FromGTestEnv("temp", 40));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "12X");
-  EXPECT_EQ(50, Int32FromGTestEnv("temp", 50));
-}
-
-# endif  // !defined(GTEST_GET_INT32_FROM_ENV_)
-
-// Tests that Int32FromGTestEnv() parses and returns the value of the
-// environment variable when it represents a valid decimal integer in
-// the range of an Int32.
-TEST(Int32FromGTestEnvTest, ParsesAndReturnsValidValue) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "123");
-  EXPECT_EQ(123, Int32FromGTestEnv("temp", 0));
-
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "TEMP", "-321");
-  EXPECT_EQ(-321, Int32FromGTestEnv("temp", 0));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests ParseInt32Flag().
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag has wrong format
-TEST(ParseInt32FlagTest, ReturnsFalseForInvalidFlag) {
-  Int32 value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--a=100", "b", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("a=100", "a", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag overflows as an Int32.
-TEST(ParseInt32FlagTest, ReturnsDefaultWhenValueOverflows) {
-  printf("(expecting 2 warnings)\n");
-
-  Int32 value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--abc=12345678987654321", "abc", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("--abc=-12345678987654321", "abc", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() returns false and doesn't change the
-// output value when the flag does not represent a valid decimal
-// integer.
-TEST(ParseInt32FlagTest, ReturnsDefaultWhenValueIsInvalid) {
-  printf("(expecting 2 warnings)\n");
-
-  Int32 value = 123;
-  EXPECT_FALSE(ParseInt32Flag("--abc=A1", "abc", &value));
-  EXPECT_EQ(123, value);
-
-  EXPECT_FALSE(ParseInt32Flag("--abc=12X", "abc", &value));
-  EXPECT_EQ(123, value);
-}
-
-// Tests that ParseInt32Flag() parses the value of the flag and
-// returns true when the flag represents a valid decimal integer in
-// the range of an Int32.
-TEST(ParseInt32FlagTest, ParsesAndReturnsValidValue) {
-  Int32 value = 123;
-  EXPECT_TRUE(ParseInt32Flag("--" GTEST_FLAG_PREFIX_ "abc=456", "abc", &value));
-  EXPECT_EQ(456, value);
-
-  EXPECT_TRUE(ParseInt32Flag("--" GTEST_FLAG_PREFIX_ "abc=-789",
-                             "abc", &value));
-  EXPECT_EQ(-789, value);
-}
-
-// Tests that Int32FromEnvOrDie() parses the value of the var or
-// returns the correct default.
-// Environment variables are not supported on Windows CE.
-#if !GTEST_OS_WINDOWS_MOBILE
-TEST(Int32FromEnvOrDieTest, ParsesAndReturnsValidValue) {
-  EXPECT_EQ(333, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", "123");
-  EXPECT_EQ(123, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", "-123");
-  EXPECT_EQ(-123, Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "UnsetVar", 333));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests that Int32FromEnvOrDie() aborts with an error message
-// if the variable is not an Int32.
-TEST(Int32FromEnvOrDieDeathTest, AbortsOnFailure) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "VAR", "xxx");
-  EXPECT_DEATH_IF_SUPPORTED(
-      Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "VAR", 123),
-      ".*");
-}
-
-// Tests that Int32FromEnvOrDie() aborts with an error message
-// if the variable cannot be represented by an Int32.
-TEST(Int32FromEnvOrDieDeathTest, AbortsOnInt32Overflow) {
-  SetEnv(GTEST_FLAG_PREFIX_UPPER_ "VAR", "1234567891234567891234");
-  EXPECT_DEATH_IF_SUPPORTED(
-      Int32FromEnvOrDie(GTEST_FLAG_PREFIX_UPPER_ "VAR", 123),
-      ".*");
-}
-
-// Tests that ShouldRunTestOnShard() selects all tests
-// where there is 1 shard.
-TEST(ShouldRunTestOnShardTest, IsPartitionWhenThereIsOneShard) {
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 0));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 1));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 2));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 3));
-  EXPECT_TRUE(ShouldRunTestOnShard(1, 0, 4));
-}
-
-class ShouldShardTest : public testing::Test {
- protected:
-  void SetUp() override {
-    index_var_ = GTEST_FLAG_PREFIX_UPPER_ "INDEX";
-    total_var_ = GTEST_FLAG_PREFIX_UPPER_ "TOTAL";
-  }
-
-  void TearDown() override {
-    SetEnv(index_var_, "");
-    SetEnv(total_var_, "");
-  }
-
-  const char* index_var_;
-  const char* total_var_;
-};
-
-// Tests that sharding is disabled if neither of the environment variables
-// are set.
-TEST_F(ShouldShardTest, ReturnsFalseWhenNeitherEnvVarIsSet) {
-  SetEnv(index_var_, "");
-  SetEnv(total_var_, "");
-
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-
-// Tests that sharding is not enabled if total_shards  == 1.
-TEST_F(ShouldShardTest, ReturnsFalseWhenTotalShardIsOne) {
-  SetEnv(index_var_, "0");
-  SetEnv(total_var_, "1");
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-
-// Tests that sharding is enabled if total_shards > 1 and
-// we are not in a death test subprocess.
-// Environment variables are not supported on Windows CE.
-#if !GTEST_OS_WINDOWS_MOBILE
-TEST_F(ShouldShardTest, WorksWhenShardEnvVarsAreValid) {
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "22");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-
-  SetEnv(index_var_, "8");
-  SetEnv(total_var_, "9");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-
-  SetEnv(index_var_, "0");
-  SetEnv(total_var_, "9");
-  EXPECT_TRUE(ShouldShard(total_var_, index_var_, false));
-  EXPECT_FALSE(ShouldShard(total_var_, index_var_, true));
-}
-#endif  // !GTEST_OS_WINDOWS_MOBILE
-
-// Tests that we exit in error if the sharding values are not valid.
-
-typedef ShouldShardTest ShouldShardDeathTest;
-
-TEST_F(ShouldShardDeathTest, AbortsWhenShardingEnvVarsAreInvalid) {
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "4");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "4");
-  SetEnv(total_var_, "-2");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "5");
-  SetEnv(total_var_, "");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-
-  SetEnv(index_var_, "");
-  SetEnv(total_var_, "5");
-  EXPECT_DEATH_IF_SUPPORTED(ShouldShard(total_var_, index_var_, false), ".*");
-}
-
-// Tests that ShouldRunTestOnShard is a partition when 5
-// shards are used.
-TEST(ShouldRunTestOnShardTest, IsPartitionWhenThereAreFiveShards) {
-  // Choose an arbitrary number of tests and shards.
-  const int num_tests = 17;
-  const int num_shards = 5;
-
-  // Check partitioning: each test should be on exactly 1 shard.
-  for (int test_id = 0; test_id < num_tests; test_id++) {
-    int prev_selected_shard_index = -1;
-    for (int shard_index = 0; shard_index < num_shards; shard_index++) {
-      if (ShouldRunTestOnShard(num_shards, shard_index, test_id)) {
-        if (prev_selected_shard_index < 0) {
-          prev_selected_shard_index = shard_index;
-        } else {
-          ADD_FAILURE() << "Shard " << prev_selected_shard_index << " and "
-            << shard_index << " are both selected to run test " << test_id;
-        }
-      }
-    }
-  }
-
-  // Check balance: This is not required by the sharding protocol, but is a
-  // desirable property for performance.
-  for (int shard_index = 0; shard_index < num_shards; shard_index++) {
-    int num_tests_on_shard = 0;
-    for (int test_id = 0; test_id < num_tests; test_id++) {
-      num_tests_on_shard +=
-        ShouldRunTestOnShard(num_shards, shard_index, test_id);
-    }
-    EXPECT_GE(num_tests_on_shard, num_tests / num_shards);
-  }
-}
-
-// For the same reason we are not explicitly testing everything in the
-// Test class, there are no separate tests for the following classes
-// (except for some trivial cases):
-//
-//   TestSuite, UnitTest, UnitTestResultPrinter.
-//
-// Similarly, there are no separate tests for the following macros:
-//
-//   TEST, TEST_F, RUN_ALL_TESTS
-
-TEST(UnitTestTest, CanGetOriginalWorkingDir) {
-  ASSERT_TRUE(UnitTest::GetInstance()->original_working_dir() != nullptr);
-  EXPECT_STRNE(UnitTest::GetInstance()->original_working_dir(), "");
-}
-
-TEST(UnitTestTest, ReturnsPlausibleTimestamp) {
-  EXPECT_LT(0, UnitTest::GetInstance()->start_timestamp());
-  EXPECT_LE(UnitTest::GetInstance()->start_timestamp(), GetTimeInMillis());
-}
-
-// When a property using a reserved key is supplied to this function, it
-// tests that a non-fatal failure is added, a fatal failure is not added,
-// and that the property is not recorded.
-void ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-    const TestResult& test_result, const char* key) {
-  EXPECT_NONFATAL_FAILURE(Test::RecordProperty(key, "1"), "Reserved key");
-  ASSERT_EQ(0, test_result.test_property_count()) << "Property for key '" << key
-                                                  << "' recorded unexpectedly.";
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-    const char* key) {
-  const TestInfo* test_info = UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(test_info != nullptr);
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(*test_info->result(),
-                                                        key);
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-    const char* key) {
-  const testing::TestSuite* test_suite =
-      UnitTest::GetInstance()->current_test_suite();
-  ASSERT_TRUE(test_suite != nullptr);
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-      test_suite->ad_hoc_test_result(), key);
-}
-
-void ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-    const char* key) {
-  ExpectNonFatalFailureRecordingPropertyWithReservedKey(
-      UnitTest::GetInstance()->ad_hoc_test_result(), key);
-}
-
-// Tests that property recording functions in UnitTest outside of tests
-// functions correcly.  Creating a separate instance of UnitTest ensures it
-// is in a state similar to the UnitTest's singleton's between tests.
-class UnitTestRecordPropertyTest :
-    public testing::internal::UnitTestRecordPropertyTestHelper {
- public:
-  static void SetUpTestSuite() {
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "disabled");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "errors");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "failures");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "name");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "tests");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTestSuite(
-        "time");
-
-    Test::RecordProperty("test_case_key_1", "1");
-
-    const testing::TestSuite* test_suite =
-        UnitTest::GetInstance()->current_test_suite();
-
-    ASSERT_TRUE(test_suite != nullptr);
-
-    ASSERT_EQ(1, test_suite->ad_hoc_test_result().test_property_count());
-    EXPECT_STREQ("test_case_key_1",
-                 test_suite->ad_hoc_test_result().GetTestProperty(0).key());
-    EXPECT_STREQ("1",
-                 test_suite->ad_hoc_test_result().GetTestProperty(0).value());
-  }
-};
-
-// Tests TestResult has the expected property when added.
-TEST_F(UnitTestRecordPropertyTest, OnePropertyFoundWhenAdded) {
-  UnitTestRecordProperty("key_1", "1");
-
-  ASSERT_EQ(1, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-}
-
-// Tests TestResult has multiple properties when added.
-TEST_F(UnitTestRecordPropertyTest, MultiplePropertiesFoundWhenAdded) {
-  UnitTestRecordProperty("key_1", "1");
-  UnitTestRecordProperty("key_2", "2");
-
-  ASSERT_EQ(2, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("1", unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-
-  EXPECT_STREQ("key_2",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).key());
-  EXPECT_STREQ("2", unit_test_.ad_hoc_test_result().GetTestProperty(1).value());
-}
-
-// Tests TestResult::RecordProperty() overrides values for duplicate keys.
-TEST_F(UnitTestRecordPropertyTest, OverridesValuesForDuplicateKeys) {
-  UnitTestRecordProperty("key_1", "1");
-  UnitTestRecordProperty("key_2", "2");
-  UnitTestRecordProperty("key_1", "12");
-  UnitTestRecordProperty("key_2", "22");
-
-  ASSERT_EQ(2, unit_test_.ad_hoc_test_result().test_property_count());
-
-  EXPECT_STREQ("key_1",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).key());
-  EXPECT_STREQ("12",
-               unit_test_.ad_hoc_test_result().GetTestProperty(0).value());
-
-  EXPECT_STREQ("key_2",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).key());
-  EXPECT_STREQ("22",
-               unit_test_.ad_hoc_test_result().GetTestProperty(1).value());
-}
-
-TEST_F(UnitTestRecordPropertyTest,
-       AddFailureInsideTestsWhenUsingTestSuiteReservedKeys) {
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "name");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "value_param");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "type_param");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "status");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "time");
-  ExpectNonFatalFailureRecordingPropertyWithReservedKeyForCurrentTest(
-      "classname");
-}
-
-TEST_F(UnitTestRecordPropertyTest,
-       AddRecordWithReservedKeysGeneratesCorrectPropertyList) {
-  EXPECT_NONFATAL_FAILURE(
-      Test::RecordProperty("name", "1"),
-      "'classname', 'name', 'status', 'time', 'type_param', 'value_param',"
-      " 'file', and 'line' are reserved");
-}
-
-class UnitTestRecordPropertyTestEnvironment : public Environment {
- public:
-  void TearDown() override {
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "tests");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "failures");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "disabled");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "errors");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "name");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "timestamp");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "time");
-    ExpectNonFatalFailureRecordingPropertyWithReservedKeyOutsideOfTestSuite(
-        "random_seed");
-  }
-};
-
-// This will test property recording outside of any test or test case.
-static Environment* record_property_env GTEST_ATTRIBUTE_UNUSED_ =
-    AddGlobalTestEnvironment(new UnitTestRecordPropertyTestEnvironment);
-
-// This group of tests is for predicate assertions (ASSERT_PRED*, etc)
-// of various arities.  They do not attempt to be exhaustive.  Rather,
-// view them as smoke tests that can be easily reviewed and verified.
-// A more complete set of tests for predicate assertions can be found
-// in gtest_pred_impl_unittest.cc.
-
-// First, some predicates and predicate-formatters needed by the tests.
-
-// Returns true if and only if the argument is an even number.
-bool IsEven(int n) {
-  return (n % 2) == 0;
-}
-
-// A functor that returns true if and only if the argument is an even number.
-struct IsEvenFunctor {
-  bool operator()(int n) { return IsEven(n); }
-};
-
-// A predicate-formatter function that asserts the argument is an even
-// number.
-AssertionResult AssertIsEven(const char* expr, int n) {
-  if (IsEven(n)) {
-    return AssertionSuccess();
-  }
-
-  Message msg;
-  msg << expr << " evaluates to " << n << ", which is not even.";
-  return AssertionFailure(msg);
-}
-
-// A predicate function that returns AssertionResult for use in
-// EXPECT/ASSERT_TRUE/FALSE.
-AssertionResult ResultIsEven(int n) {
-  if (IsEven(n))
-    return AssertionSuccess() << n << " is even";
-  else
-    return AssertionFailure() << n << " is odd";
-}
-
-// A predicate function that returns AssertionResult but gives no
-// explanation why it succeeds. Needed for testing that
-// EXPECT/ASSERT_FALSE handles such functions correctly.
-AssertionResult ResultIsEvenNoExplanation(int n) {
-  if (IsEven(n))
-    return AssertionSuccess();
-  else
-    return AssertionFailure() << n << " is odd";
-}
-
-// A predicate-formatter functor that asserts the argument is an even
-// number.
-struct AssertIsEvenFunctor {
-  AssertionResult operator()(const char* expr, int n) {
-    return AssertIsEven(expr, n);
-  }
-};
-
-// Returns true if and only if the sum of the arguments is an even number.
-bool SumIsEven2(int n1, int n2) {
-  return IsEven(n1 + n2);
-}
-
-// A functor that returns true if and only if the sum of the arguments is an
-// even number.
-struct SumIsEven3Functor {
-  bool operator()(int n1, int n2, int n3) {
-    return IsEven(n1 + n2 + n3);
-  }
-};
-
-// A predicate-formatter function that asserts the sum of the
-// arguments is an even number.
-AssertionResult AssertSumIsEven4(
-    const char* e1, const char* e2, const char* e3, const char* e4,
-    int n1, int n2, int n3, int n4) {
-  const int sum = n1 + n2 + n3 + n4;
-  if (IsEven(sum)) {
-    return AssertionSuccess();
-  }
-
-  Message msg;
-  msg << e1 << " + " << e2 << " + " << e3 << " + " << e4
-      << " (" << n1 << " + " << n2 << " + " << n3 << " + " << n4
-      << ") evaluates to " << sum << ", which is not even.";
-  return AssertionFailure(msg);
-}
-
-// A predicate-formatter functor that asserts the sum of the arguments
-// is an even number.
-struct AssertSumIsEven5Functor {
-  AssertionResult operator()(
-      const char* e1, const char* e2, const char* e3, const char* e4,
-      const char* e5, int n1, int n2, int n3, int n4, int n5) {
-    const int sum = n1 + n2 + n3 + n4 + n5;
-    if (IsEven(sum)) {
-      return AssertionSuccess();
-    }
-
-    Message msg;
-    msg << e1 << " + " << e2 << " + " << e3 << " + " << e4 << " + " << e5
-        << " ("
-        << n1 << " + " << n2 << " + " << n3 << " + " << n4 << " + " << n5
-        << ") evaluates to " << sum << ", which is not even.";
-    return AssertionFailure(msg);
-  }
-};
-
-
-// Tests unary predicate assertions.
-
-// Tests unary predicate assertions that don't use a custom formatter.
-TEST(Pred1Test, WithoutFormat) {
-  // Success cases.
-  EXPECT_PRED1(IsEvenFunctor(), 2) << "This failure is UNEXPECTED!";
-  ASSERT_PRED1(IsEven, 4);
-
-  // Failure cases.
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED1(IsEven, 5) << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE(ASSERT_PRED1(IsEvenFunctor(), 5),
-                       "evaluates to false");
-}
-
-// Tests unary predicate assertions that use a custom formatter.
-TEST(Pred1Test, WithFormat) {
-  // Success cases.
-  EXPECT_PRED_FORMAT1(AssertIsEven, 2);
-  ASSERT_PRED_FORMAT1(AssertIsEvenFunctor(), 4)
-    << "This failure is UNEXPECTED!";
-
-  // Failure cases.
-  const int n = 5;
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT1(AssertIsEvenFunctor(), n),
-                          "n evaluates to 5, which is not even.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(AssertIsEven, 5) << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-// Tests that unary predicate assertions evaluates their arguments
-// exactly once.
-TEST(Pred1Test, SingleEvaluationOnFailure) {
-  // A success case.
-  static int n = 0;
-  EXPECT_PRED1(IsEven, n++);
-  EXPECT_EQ(1, n) << "The argument is not evaluated exactly once.";
-
-  // A failure case.
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT1(AssertIsEvenFunctor(), n++)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_EQ(2, n) << "The argument is not evaluated exactly once.";
-}
-
-
-// Tests predicate assertions whose arity is >= 2.
-
-// Tests predicate assertions that don't use a custom formatter.
-TEST(PredTest, WithoutFormat) {
-  // Success cases.
-  ASSERT_PRED2(SumIsEven2, 2, 4) << "This failure is UNEXPECTED!";
-  EXPECT_PRED3(SumIsEven3Functor(), 4, 6, 8);
-
-  // Failure cases.
-  const int n1 = 1;
-  const int n2 = 2;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED2(SumIsEven2, n1, n2) << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED3(SumIsEven3Functor(), 1, 2, 4);
-  }, "evaluates to false");
-}
-
-// Tests predicate assertions that use a custom formatter.
-TEST(PredTest, WithFormat) {
-  // Success cases.
-  ASSERT_PRED_FORMAT4(AssertSumIsEven4, 4, 6, 8, 10) <<
-    "This failure is UNEXPECTED!";
-  EXPECT_PRED_FORMAT5(AssertSumIsEven5Functor(), 2, 4, 6, 8, 10);
-
-  // Failure cases.
-  const int n1 = 1;
-  const int n2 = 2;
-  const int n3 = 4;
-  const int n4 = 6;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(AssertSumIsEven4, n1, n2, n3, n4);
-  }, "evaluates to 13, which is not even.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT5(AssertSumIsEven5Functor(), 1, 2, 4, 6, 8)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-}
-
-// Tests that predicate assertions evaluates their arguments
-// exactly once.
-TEST(PredTest, SingleEvaluationOnFailure) {
-  // A success case.
-  int n1 = 0;
-  int n2 = 0;
-  EXPECT_PRED2(SumIsEven2, n1++, n2++);
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-
-  // Another success case.
-  n1 = n2 = 0;
-  int n3 = 0;
-  int n4 = 0;
-  int n5 = 0;
-  ASSERT_PRED_FORMAT5(AssertSumIsEven5Functor(),
-                      n1++, n2++, n3++, n4++, n5++)
-                        << "This failure is UNEXPECTED!";
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-  EXPECT_EQ(1, n4) << "Argument 4 is not evaluated exactly once.";
-  EXPECT_EQ(1, n5) << "Argument 5 is not evaluated exactly once.";
-
-  // A failure case.
-  n1 = n2 = n3 = 0;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED3(SumIsEven3Functor(), ++n1, n2++, n3++)
-        << "This failure is expected.";
-  }, "This failure is expected.");
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-
-  // Another failure case.
-  n1 = n2 = n3 = n4 = 0;
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT4(AssertSumIsEven4, ++n1, n2++, n3++, n4++);
-  }, "evaluates to 1, which is not even.");
-  EXPECT_EQ(1, n1) << "Argument 1 is not evaluated exactly once.";
-  EXPECT_EQ(1, n2) << "Argument 2 is not evaluated exactly once.";
-  EXPECT_EQ(1, n3) << "Argument 3 is not evaluated exactly once.";
-  EXPECT_EQ(1, n4) << "Argument 4 is not evaluated exactly once.";
-}
-
-// Test predicate assertions for sets
-TEST(PredTest, ExpectPredEvalFailure) {
-  std::set<int> set_a = {2, 1, 3, 4, 5};
-  std::set<int> set_b = {0, 4, 8};
-  const auto compare_sets = [] (std::set<int>, std::set<int>) { return false; };
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_PRED2(compare_sets, set_a, set_b),
-      "compare_sets(set_a, set_b) evaluates to false, where\nset_a evaluates "
-      "to { 1, 2, 3, 4, 5 }\nset_b evaluates to { 0, 4, 8 }");
-}
-
-// Some helper functions for testing using overloaded/template
-// functions with ASSERT_PREDn and EXPECT_PREDn.
-
-bool IsPositive(double x) {
-  return x > 0;
-}
-
-template <typename T>
-bool IsNegative(T x) {
-  return x < 0;
-}
-
-template <typename T1, typename T2>
-bool GreaterThan(T1 x1, T2 x2) {
-  return x1 > x2;
-}
-
-// Tests that overloaded functions can be used in *_PRED* as long as
-// their types are explicitly specified.
-TEST(PredicateAssertionTest, AcceptsOverloadedFunction) {
-  // C++Builder requires C-style casts rather than static_cast.
-  EXPECT_PRED1((bool (*)(int))(IsPositive), 5);  // NOLINT
-  ASSERT_PRED1((bool (*)(double))(IsPositive), 6.0);  // NOLINT
-}
-
-// Tests that template functions can be used in *_PRED* as long as
-// their types are explicitly specified.
-TEST(PredicateAssertionTest, AcceptsTemplateFunction) {
-  EXPECT_PRED1(IsNegative<int>, -5);
-  // Makes sure that we can handle templates with more than one
-  // parameter.
-  ASSERT_PRED2((GreaterThan<int, int>), 5, 0);
-}
-
-
-// Some helper functions for testing using overloaded/template
-// functions with ASSERT_PRED_FORMATn and EXPECT_PRED_FORMATn.
-
-AssertionResult IsPositiveFormat(const char* /* expr */, int n) {
-  return n > 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-AssertionResult IsPositiveFormat(const char* /* expr */, double x) {
-  return x > 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-template <typename T>
-AssertionResult IsNegativeFormat(const char* /* expr */, T x) {
-  return x < 0 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-template <typename T1, typename T2>
-AssertionResult EqualsFormat(const char* /* expr1 */, const char* /* expr2 */,
-                             const T1& x1, const T2& x2) {
-  return x1 == x2 ? AssertionSuccess() :
-      AssertionFailure(Message() << "Failure");
-}
-
-// Tests that overloaded functions can be used in *_PRED_FORMAT*
-// without explicitly specifying their types.
-TEST(PredicateFormatAssertionTest, AcceptsOverloadedFunction) {
-  EXPECT_PRED_FORMAT1(IsPositiveFormat, 5);
-  ASSERT_PRED_FORMAT1(IsPositiveFormat, 6.0);
-}
-
-// Tests that template functions can be used in *_PRED_FORMAT* without
-// explicitly specifying their types.
-TEST(PredicateFormatAssertionTest, AcceptsTemplateFunction) {
-  EXPECT_PRED_FORMAT1(IsNegativeFormat, -5);
-  ASSERT_PRED_FORMAT2(EqualsFormat, 3, 3);
-}
-
-
-// Tests string assertions.
-
-// Tests ASSERT_STREQ with non-NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ) {
-  const char * const p1 = "good";
-  ASSERT_STREQ(p1, p1);
-
-  // Let p2 have the same content as p1, but be at a different address.
-  const char p2[] = "good";
-  ASSERT_STREQ(p1, p2);
-
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("bad", "good"),
-                       "  \"bad\"\n  \"good\"");
-}
-
-// Tests ASSERT_STREQ with NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ_Null) {
-  ASSERT_STREQ(static_cast<const char*>(nullptr), nullptr);
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ(nullptr, "non-null"), "non-null");
-}
-
-// Tests ASSERT_STREQ with NULL arguments.
-TEST(StringAssertionTest, ASSERT_STREQ_Null2) {
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("non-null", nullptr), "non-null");
-}
-
-// Tests ASSERT_STRNE.
-TEST(StringAssertionTest, ASSERT_STRNE) {
-  ASSERT_STRNE("hi", "Hi");
-  ASSERT_STRNE("Hi", nullptr);
-  ASSERT_STRNE(nullptr, "Hi");
-  ASSERT_STRNE("", nullptr);
-  ASSERT_STRNE(nullptr, "");
-  ASSERT_STRNE("", "Hi");
-  ASSERT_STRNE("Hi", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRNE("Hi", "Hi"),
-                       "\"Hi\" vs \"Hi\"");
-}
-
-// Tests ASSERT_STRCASEEQ.
-TEST(StringAssertionTest, ASSERT_STRCASEEQ) {
-  ASSERT_STRCASEEQ("hi", "Hi");
-  ASSERT_STRCASEEQ(static_cast<const char*>(nullptr), nullptr);
-
-  ASSERT_STRCASEEQ("", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASEEQ("Hi", "hi2"),
-                       "Ignoring case");
-}
-
-// Tests ASSERT_STRCASENE.
-TEST(StringAssertionTest, ASSERT_STRCASENE) {
-  ASSERT_STRCASENE("hi1", "Hi2");
-  ASSERT_STRCASENE("Hi", nullptr);
-  ASSERT_STRCASENE(nullptr, "Hi");
-  ASSERT_STRCASENE("", nullptr);
-  ASSERT_STRCASENE(nullptr, "");
-  ASSERT_STRCASENE("", "Hi");
-  ASSERT_STRCASENE("Hi", "");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("Hi", "hi"),
-                       "(ignoring case)");
-}
-
-// Tests *_STREQ on wide strings.
-TEST(StringAssertionTest, STREQ_Wide) {
-  // NULL strings.
-  ASSERT_STREQ(static_cast<const wchar_t*>(nullptr), nullptr);
-
-  // Empty strings.
-  ASSERT_STREQ(L"", L"");
-
-  // Non-null vs NULL.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"non-null", nullptr), "non-null");
-
-  // Equal strings.
-  EXPECT_STREQ(L"Hi", L"Hi");
-
-  // Unequal strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"abc", L"Abc"),
-                          "Abc");
-
-  // Strings containing wide characters.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ(L"abc\x8119", L"abc\x8120"),
-                          "abc");
-
-  // The streaming variation.
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_STREQ(L"abc\x8119", L"abc\x8121") << "Expected failure";
-  }, "Expected failure");
-}
-
-// Tests *_STRNE on wide strings.
-TEST(StringAssertionTest, STRNE_Wide) {
-  // NULL strings.
-  EXPECT_NONFATAL_FAILURE(
-      {  // NOLINT
-        EXPECT_STRNE(static_cast<const wchar_t*>(nullptr), nullptr);
-      },
-      "");
-
-  // Empty strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"", L""),
-                          "L\"\"");
-
-  // Non-null vs NULL.
-  ASSERT_STRNE(L"non-null", nullptr);
-
-  // Equal strings.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"Hi", L"Hi"),
-                          "L\"Hi\"");
-
-  // Unequal strings.
-  EXPECT_STRNE(L"abc", L"Abc");
-
-  // Strings containing wide characters.
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE(L"abc\x8119", L"abc\x8119"),
-                          "abc");
-
-  // The streaming variation.
-  ASSERT_STRNE(L"abc\x8119", L"abc\x8120") << "This shouldn't happen";
-}
-
-// Tests for ::testing::IsSubstring().
-
-// Tests that IsSubstring() returns the correct result when the input
-// argument type is const char*.
-TEST(IsSubstringTest, ReturnsCorrectResultForCString) {
-  EXPECT_FALSE(IsSubstring("", "", nullptr, "a"));
-  EXPECT_FALSE(IsSubstring("", "", "b", nullptr));
-  EXPECT_FALSE(IsSubstring("", "", "needle", "haystack"));
-
-  EXPECT_TRUE(IsSubstring("", "", static_cast<const char*>(nullptr), nullptr));
-  EXPECT_TRUE(IsSubstring("", "", "needle", "two needles"));
-}
-
-// Tests that IsSubstring() returns the correct result when the input
-// argument type is const wchar_t*.
-TEST(IsSubstringTest, ReturnsCorrectResultForWideCString) {
-  EXPECT_FALSE(IsSubstring("", "", kNull, L"a"));
-  EXPECT_FALSE(IsSubstring("", "", L"b", kNull));
-  EXPECT_FALSE(IsSubstring("", "", L"needle", L"haystack"));
-
-  EXPECT_TRUE(
-      IsSubstring("", "", static_cast<const wchar_t*>(nullptr), nullptr));
-  EXPECT_TRUE(IsSubstring("", "", L"needle", L"two needles"));
-}
-
-// Tests that IsSubstring() generates the correct message when the input
-// argument type is const char*.
-TEST(IsSubstringTest, GeneratesCorrectMessageForCString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: \"needle\"\n"
-               "Expected: a substring of haystack_expr\n"
-               "Which is: \"haystack\"",
-               IsSubstring("needle_expr", "haystack_expr",
-                           "needle", "haystack").failure_message());
-}
-
-// Tests that IsSubstring returns the correct result when the input
-// argument type is ::std::string.
-TEST(IsSubstringTest, ReturnsCorrectResultsForStdString) {
-  EXPECT_TRUE(IsSubstring("", "", std::string("hello"), "ahellob"));
-  EXPECT_FALSE(IsSubstring("", "", "hello", std::string("world")));
-}
-
-#if GTEST_HAS_STD_WSTRING
-// Tests that IsSubstring returns the correct result when the input
-// argument type is ::std::wstring.
-TEST(IsSubstringTest, ReturnsCorrectResultForStdWstring) {
-  EXPECT_TRUE(IsSubstring("", "", ::std::wstring(L"needle"), L"two needles"));
-  EXPECT_FALSE(IsSubstring("", "", L"needle", ::std::wstring(L"haystack")));
-}
-
-// Tests that IsSubstring() generates the correct message when the input
-// argument type is ::std::wstring.
-TEST(IsSubstringTest, GeneratesCorrectMessageForWstring) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: L\"needle\"\n"
-               "Expected: a substring of haystack_expr\n"
-               "Which is: L\"haystack\"",
-               IsSubstring(
-                   "needle_expr", "haystack_expr",
-                   ::std::wstring(L"needle"), L"haystack").failure_message());
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests for ::testing::IsNotSubstring().
-
-// Tests that IsNotSubstring() returns the correct result when the input
-// argument type is const char*.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForCString) {
-  EXPECT_TRUE(IsNotSubstring("", "", "needle", "haystack"));
-  EXPECT_FALSE(IsNotSubstring("", "", "needle", "two needles"));
-}
-
-// Tests that IsNotSubstring() returns the correct result when the input
-// argument type is const wchar_t*.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForWideCString) {
-  EXPECT_TRUE(IsNotSubstring("", "", L"needle", L"haystack"));
-  EXPECT_FALSE(IsNotSubstring("", "", L"needle", L"two needles"));
-}
-
-// Tests that IsNotSubstring() generates the correct message when the input
-// argument type is const wchar_t*.
-TEST(IsNotSubstringTest, GeneratesCorrectMessageForWideCString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: L\"needle\"\n"
-               "Expected: not a substring of haystack_expr\n"
-               "Which is: L\"two needles\"",
-               IsNotSubstring(
-                   "needle_expr", "haystack_expr",
-                   L"needle", L"two needles").failure_message());
-}
-
-// Tests that IsNotSubstring returns the correct result when the input
-// argument type is ::std::string.
-TEST(IsNotSubstringTest, ReturnsCorrectResultsForStdString) {
-  EXPECT_FALSE(IsNotSubstring("", "", std::string("hello"), "ahellob"));
-  EXPECT_TRUE(IsNotSubstring("", "", "hello", std::string("world")));
-}
-
-// Tests that IsNotSubstring() generates the correct message when the input
-// argument type is ::std::string.
-TEST(IsNotSubstringTest, GeneratesCorrectMessageForStdString) {
-  EXPECT_STREQ("Value of: needle_expr\n"
-               "  Actual: \"needle\"\n"
-               "Expected: not a substring of haystack_expr\n"
-               "Which is: \"two needles\"",
-               IsNotSubstring(
-                   "needle_expr", "haystack_expr",
-                   ::std::string("needle"), "two needles").failure_message());
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Tests that IsNotSubstring returns the correct result when the input
-// argument type is ::std::wstring.
-TEST(IsNotSubstringTest, ReturnsCorrectResultForStdWstring) {
-  EXPECT_FALSE(
-      IsNotSubstring("", "", ::std::wstring(L"needle"), L"two needles"));
-  EXPECT_TRUE(IsNotSubstring("", "", L"needle", ::std::wstring(L"haystack")));
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests floating-point assertions.
-
-template <typename RawType>
-class FloatingPointTest : public Test {
- protected:
-  // Pre-calculated numbers to be used by the tests.
-  struct TestValues {
-    RawType close_to_positive_zero;
-    RawType close_to_negative_zero;
-    RawType further_from_negative_zero;
-
-    RawType close_to_one;
-    RawType further_from_one;
-
-    RawType infinity;
-    RawType close_to_infinity;
-    RawType further_from_infinity;
-
-    RawType nan1;
-    RawType nan2;
-  };
-
-  typedef typename testing::internal::FloatingPoint<RawType> Floating;
-  typedef typename Floating::Bits Bits;
-
-  void SetUp() override {
-    const size_t max_ulps = Floating::kMaxUlps;
-
-    // The bits that represent 0.0.
-    const Bits zero_bits = Floating(0).bits();
-
-    // Makes some numbers close to 0.0.
-    values_.close_to_positive_zero = Floating::ReinterpretBits(
-        zero_bits + max_ulps/2);
-    values_.close_to_negative_zero = -Floating::ReinterpretBits(
-        zero_bits + max_ulps - max_ulps/2);
-    values_.further_from_negative_zero = -Floating::ReinterpretBits(
-        zero_bits + max_ulps + 1 - max_ulps/2);
-
-    // The bits that represent 1.0.
-    const Bits one_bits = Floating(1).bits();
-
-    // Makes some numbers close to 1.0.
-    values_.close_to_one = Floating::ReinterpretBits(one_bits + max_ulps);
-    values_.further_from_one = Floating::ReinterpretBits(
-        one_bits + max_ulps + 1);
-
-    // +infinity.
-    values_.infinity = Floating::Infinity();
-
-    // The bits that represent +infinity.
-    const Bits infinity_bits = Floating(values_.infinity).bits();
-
-    // Makes some numbers close to infinity.
-    values_.close_to_infinity = Floating::ReinterpretBits(
-        infinity_bits - max_ulps);
-    values_.further_from_infinity = Floating::ReinterpretBits(
-        infinity_bits - max_ulps - 1);
-
-    // Makes some NAN's.  Sets the most significant bit of the fraction so that
-    // our NaN's are quiet; trying to process a signaling NaN would raise an
-    // exception if our environment enables floating point exceptions.
-    values_.nan1 = Floating::ReinterpretBits(Floating::kExponentBitMask
-        | (static_cast<Bits>(1) << (Floating::kFractionBitCount - 1)) | 1);
-    values_.nan2 = Floating::ReinterpretBits(Floating::kExponentBitMask
-        | (static_cast<Bits>(1) << (Floating::kFractionBitCount - 1)) | 200);
-  }
-
-  void TestSize() {
-    EXPECT_EQ(sizeof(RawType), sizeof(Bits));
-  }
-
-  static TestValues values_;
-};
-
-template <typename RawType>
-typename FloatingPointTest<RawType>::TestValues
-    FloatingPointTest<RawType>::values_;
-
-// Instantiates FloatingPointTest for testing *_FLOAT_EQ.
-typedef FloatingPointTest<float> FloatTest;
-
-// Tests that the size of Float::Bits matches the size of float.
-TEST_F(FloatTest, Size) {
-  TestSize();
-}
-
-// Tests comparing with +0 and -0.
-TEST_F(FloatTest, Zeros) {
-  EXPECT_FLOAT_EQ(0.0, -0.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(-0.0, 1.0),
-                          "1.0");
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(0.0, 1.5),
-                       "1.5");
-}
-
-// Tests comparing numbers close to 0.
-//
-// This ensures that *_FLOAT_EQ handles the sign correctly and no
-// overflow occurs when comparing numbers whose absolute value is very
-// small.
-TEST_F(FloatTest, AlmostZeros) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const FloatTest::TestValues& v = this->values_;
-
-  EXPECT_FLOAT_EQ(0.0, v.close_to_positive_zero);
-  EXPECT_FLOAT_EQ(-0.0, v.close_to_negative_zero);
-  EXPECT_FLOAT_EQ(v.close_to_positive_zero, v.close_to_negative_zero);
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_FLOAT_EQ(v.close_to_positive_zero,
-                    v.further_from_negative_zero);
-  }, "v.further_from_negative_zero");
-}
-
-// Tests comparing numbers close to each other.
-TEST_F(FloatTest, SmallDiff) {
-  EXPECT_FLOAT_EQ(1.0, values_.close_to_one);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(1.0, values_.further_from_one),
-                          "values_.further_from_one");
-}
-
-// Tests comparing numbers far apart.
-TEST_F(FloatTest, LargeDiff) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(2.5, 3.0),
-                          "3.0");
-}
-
-// Tests comparing with infinity.
-//
-// This ensures that no overflow occurs when comparing numbers whose
-// absolute value is very large.
-TEST_F(FloatTest, Infinity) {
-  EXPECT_FLOAT_EQ(values_.infinity, values_.close_to_infinity);
-  EXPECT_FLOAT_EQ(-values_.infinity, -values_.close_to_infinity);
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.infinity, -values_.infinity),
-                          "-values_.infinity");
-
-  // This is interesting as the representations of infinity and nan1
-  // are only 1 DLP apart.
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.infinity, values_.nan1),
-                          "values_.nan1");
-}
-
-// Tests that comparing with NAN always returns false.
-TEST_F(FloatTest, NaN) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const FloatTest::TestValues& v = this->values_;
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(v.nan1, v.nan1),
-                          "v.nan1");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(v.nan1, v.nan2),
-                          "v.nan2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(1.0, v.nan1),
-                          "v.nan1");
-
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(v.nan1, v.infinity),
-                       "v.infinity");
-}
-
-// Tests that *_FLOAT_EQ are reflexive.
-TEST_F(FloatTest, Reflexive) {
-  EXPECT_FLOAT_EQ(0.0, 0.0);
-  EXPECT_FLOAT_EQ(1.0, 1.0);
-  ASSERT_FLOAT_EQ(values_.infinity, values_.infinity);
-}
-
-// Tests that *_FLOAT_EQ are commutative.
-TEST_F(FloatTest, Commutative) {
-  // We already tested EXPECT_FLOAT_EQ(1.0, values_.close_to_one).
-  EXPECT_FLOAT_EQ(values_.close_to_one, 1.0);
-
-  // We already tested EXPECT_FLOAT_EQ(1.0, values_.further_from_one).
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(values_.further_from_one, 1.0),
-                          "1.0");
-}
-
-// Tests EXPECT_NEAR.
-TEST_F(FloatTest, EXPECT_NEAR) {
-  EXPECT_NEAR(-1.0f, -1.1f, 0.2f);
-  EXPECT_NEAR(2.0f, 3.0f, 1.0f);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NEAR(1.0f,1.5f, 0.25f),  // NOLINT
-                          "The difference between 1.0f and 1.5f is 0.5, "
-                          "which exceeds 0.25f");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous line.
-}
-
-// Tests ASSERT_NEAR.
-TEST_F(FloatTest, ASSERT_NEAR) {
-  ASSERT_NEAR(-1.0f, -1.1f, 0.2f);
-  ASSERT_NEAR(2.0f, 3.0f, 1.0f);
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1.0f,1.5f, 0.25f),  // NOLINT
-                       "The difference between 1.0f and 1.5f is 0.5, "
-                       "which exceeds 0.25f");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous line.
-}
-
-// Tests the cases where FloatLE() should succeed.
-TEST_F(FloatTest, FloatLESucceeds) {
-  EXPECT_PRED_FORMAT2(FloatLE, 1.0f, 2.0f);  // When val1 < val2,
-  ASSERT_PRED_FORMAT2(FloatLE, 1.0f, 1.0f);  // val1 == val2,
-
-  // or when val1 is greater than, but almost equals to, val2.
-  EXPECT_PRED_FORMAT2(FloatLE, values_.close_to_positive_zero, 0.0f);
-}
-
-// Tests the cases where FloatLE() should fail.
-TEST_F(FloatTest, FloatLEFails) {
-  // When val1 is greater than val2 by a large margin,
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT2(FloatLE, 2.0f, 1.0f),
-                          "(2.0f) <= (1.0f)");
-
-  // or by a small yet non-negligible margin,
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, values_.further_from_one, 1.0f);
-  }, "(values_.further_from_one) <= (1.0f)");
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, values_.nan1, values_.infinity);
-  }, "(values_.nan1) <= (values_.infinity)");
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(FloatLE, -values_.infinity, values_.nan1);
-  }, "(-values_.infinity) <= (values_.nan1)");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(FloatLE, values_.nan1, values_.nan1);
-  }, "(values_.nan1) <= (values_.nan1)");
-}
-
-// Instantiates FloatingPointTest for testing *_DOUBLE_EQ.
-typedef FloatingPointTest<double> DoubleTest;
-
-// Tests that the size of Double::Bits matches the size of double.
-TEST_F(DoubleTest, Size) {
-  TestSize();
-}
-
-// Tests comparing with +0 and -0.
-TEST_F(DoubleTest, Zeros) {
-  EXPECT_DOUBLE_EQ(0.0, -0.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(-0.0, 1.0),
-                          "1.0");
-  EXPECT_FATAL_FAILURE(ASSERT_DOUBLE_EQ(0.0, 1.0),
-                       "1.0");
-}
-
-// Tests comparing numbers close to 0.
-//
-// This ensures that *_DOUBLE_EQ handles the sign correctly and no
-// overflow occurs when comparing numbers whose absolute value is very
-// small.
-TEST_F(DoubleTest, AlmostZeros) {
-  // In C++Builder, names within local classes (such as used by
-  // EXPECT_FATAL_FAILURE) cannot be resolved against static members of the
-  // scoping class.  Use a static local alias as a workaround.
-  // We use the assignment syntax since some compilers, like Sun Studio,
-  // don't allow initializing references using construction syntax
-  // (parentheses).
-  static const DoubleTest::TestValues& v = this->values_;
-
-  EXPECT_DOUBLE_EQ(0.0, v.close_to_positive_zero);
-  EXPECT_DOUBLE_EQ(-0.0, v.close_to_negative_zero);
-  EXPECT_DOUBLE_EQ(v.close_to_positive_zero, v.close_to_negative_zero);
-
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_DOUBLE_EQ(v.close_to_positive_zero,
-                     v.further_from_negative_zero);
-  }, "v.further_from_negative_zero");
-}
-
-// Tests comparing numbers close to each other.
-TEST_F(DoubleTest, SmallDiff) {
-  EXPECT_DOUBLE_EQ(1.0, values_.close_to_one);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1.0, values_.further_from_one),
-                          "values_.further_from_one");
-}
-
-// Tests comparing numbers far apart.
-TEST_F(DoubleTest, LargeDiff) {
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(2.0, 3.0),
-                          "3.0");
-}
-
-// Tests comparing with infinity.
-//
-// This ensures that no overflow occurs when comparing numbers whose
-// absolute value is very large.
-TEST_F(DoubleTest, Infinity) {
-  EXPECT_DOUBLE_EQ(values_.infinity, values_.close_to_infinity);
-  EXPECT_DOUBLE_EQ(-values_.infinity, -values_.close_to_infinity);
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.infinity, -values_.infinity),
-                          "-values_.infinity");
-
-  // This is interesting as the representations of infinity_ and nan1_
-  // are only 1 DLP apart.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.infinity, values_.nan1),
-                          "values_.nan1");
-}
-
-// Tests that comparing with NAN always returns false.
-TEST_F(DoubleTest, NaN) {
-  static const DoubleTest::TestValues& v = this->values_;
-
-  // Nokia's STLport crashes if we try to output infinity or NaN.
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(v.nan1, v.nan1),
-                          "v.nan1");
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(v.nan1, v.nan2), "v.nan2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1.0, v.nan1), "v.nan1");
-  EXPECT_FATAL_FAILURE(ASSERT_DOUBLE_EQ(v.nan1, v.infinity),
-                       "v.infinity");
-}
-
-// Tests that *_DOUBLE_EQ are reflexive.
-TEST_F(DoubleTest, Reflexive) {
-  EXPECT_DOUBLE_EQ(0.0, 0.0);
-  EXPECT_DOUBLE_EQ(1.0, 1.0);
-  ASSERT_DOUBLE_EQ(values_.infinity, values_.infinity);
-}
-
-// Tests that *_DOUBLE_EQ are commutative.
-TEST_F(DoubleTest, Commutative) {
-  // We already tested EXPECT_DOUBLE_EQ(1.0, values_.close_to_one).
-  EXPECT_DOUBLE_EQ(values_.close_to_one, 1.0);
-
-  // We already tested EXPECT_DOUBLE_EQ(1.0, values_.further_from_one).
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(values_.further_from_one, 1.0),
-                          "1.0");
-}
-
-// Tests EXPECT_NEAR.
-TEST_F(DoubleTest, EXPECT_NEAR) {
-  EXPECT_NEAR(-1.0, -1.1, 0.2);
-  EXPECT_NEAR(2.0, 3.0, 1.0);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NEAR(1.0, 1.5, 0.25),  // NOLINT
-                          "The difference between 1.0 and 1.5 is 0.5, "
-                          "which exceeds 0.25");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous statement.
-}
-
-// Tests ASSERT_NEAR.
-TEST_F(DoubleTest, ASSERT_NEAR) {
-  ASSERT_NEAR(-1.0, -1.1, 0.2);
-  ASSERT_NEAR(2.0, 3.0, 1.0);
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1.0, 1.5, 0.25),  // NOLINT
-                       "The difference between 1.0 and 1.5 is 0.5, "
-                       "which exceeds 0.25");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous statement.
-}
-
-// Tests the cases where DoubleLE() should succeed.
-TEST_F(DoubleTest, DoubleLESucceeds) {
-  EXPECT_PRED_FORMAT2(DoubleLE, 1.0, 2.0);  // When val1 < val2,
-  ASSERT_PRED_FORMAT2(DoubleLE, 1.0, 1.0);  // val1 == val2,
-
-  // or when val1 is greater than, but almost equals to, val2.
-  EXPECT_PRED_FORMAT2(DoubleLE, values_.close_to_positive_zero, 0.0);
-}
-
-// Tests the cases where DoubleLE() should fail.
-TEST_F(DoubleTest, DoubleLEFails) {
-  // When val1 is greater than val2 by a large margin,
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED_FORMAT2(DoubleLE, 2.0, 1.0),
-                          "(2.0) <= (1.0)");
-
-  // or by a small yet non-negligible margin,
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, values_.further_from_one, 1.0);
-  }, "(values_.further_from_one) <= (1.0)");
-
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, values_.nan1, values_.infinity);
-  }, "(values_.nan1) <= (values_.infinity)");
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_PRED_FORMAT2(DoubleLE, -values_.infinity, values_.nan1);
-  }, " (-values_.infinity) <= (values_.nan1)");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_PRED_FORMAT2(DoubleLE, values_.nan1, values_.nan1);
-  }, "(values_.nan1) <= (values_.nan1)");
-}
-
-
-// Verifies that a test or test case whose name starts with DISABLED_ is
-// not run.
-
-// A test whose name starts with DISABLED_.
-// Should not run.
-TEST(DisabledTest, DISABLED_TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-// A test whose name does not start with DISABLED_.
-// Should run.
-TEST(DisabledTest, NotDISABLED_TestShouldRun) {
-  EXPECT_EQ(1, 1);
-}
-
-// A test case whose name starts with DISABLED_.
-// Should not run.
-TEST(DISABLED_TestSuite, TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Test in disabled test case should not be run.";
-}
-
-// A test case and test whose names start with DISABLED_.
-// Should not run.
-TEST(DISABLED_TestSuite, DISABLED_TestShouldNotRun) {
-  FAIL() << "Unexpected failure: Test in disabled test case should not be run.";
-}
-
-// Check that when all tests in a test case are disabled, SetUpTestSuite() and
-// TearDownTestSuite() are not called.
-class DisabledTestsTest : public Test {
- protected:
-  static void SetUpTestSuite() {
-    FAIL() << "Unexpected failure: All tests disabled in test case. "
-              "SetUpTestSuite() should not be called.";
-  }
-
-  static void TearDownTestSuite() {
-    FAIL() << "Unexpected failure: All tests disabled in test case. "
-              "TearDownTestSuite() should not be called.";
-  }
-};
-
-TEST_F(DisabledTestsTest, DISABLED_TestShouldNotRun_1) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-TEST_F(DisabledTestsTest, DISABLED_TestShouldNotRun_2) {
-  FAIL() << "Unexpected failure: Disabled test should not be run.";
-}
-
-// Tests that disabled typed tests aren't run.
-
-#if GTEST_HAS_TYPED_TEST
-
-template <typename T>
-class TypedTest : public Test {
-};
-
-typedef testing::Types<int, double> NumericTypes;
-TYPED_TEST_SUITE(TypedTest, NumericTypes);
-
-TYPED_TEST(TypedTest, DISABLED_ShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled typed test should not run.";
-}
-
-template <typename T>
-class DISABLED_TypedTest : public Test {
-};
-
-TYPED_TEST_SUITE(DISABLED_TypedTest, NumericTypes);
-
-TYPED_TEST(DISABLED_TypedTest, ShouldNotRun) {
-  FAIL() << "Unexpected failure: Disabled typed test should not run.";
-}
-
-#endif  // GTEST_HAS_TYPED_TEST
-
-// Tests that disabled type-parameterized tests aren't run.
-
-#if GTEST_HAS_TYPED_TEST_P
-
-template <typename T>
-class TypedTestP : public Test {
-};
-
-TYPED_TEST_SUITE_P(TypedTestP);
-
-TYPED_TEST_P(TypedTestP, DISABLED_ShouldNotRun) {
-  FAIL() << "Unexpected failure: "
-         << "Disabled type-parameterized test should not run.";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(TypedTestP, DISABLED_ShouldNotRun);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, TypedTestP, NumericTypes);
-
-template <typename T>
-class DISABLED_TypedTestP : public Test {
-};
-
-TYPED_TEST_SUITE_P(DISABLED_TypedTestP);
-
-TYPED_TEST_P(DISABLED_TypedTestP, ShouldNotRun) {
-  FAIL() << "Unexpected failure: "
-         << "Disabled type-parameterized test should not run.";
-}
-
-REGISTER_TYPED_TEST_SUITE_P(DISABLED_TypedTestP, ShouldNotRun);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, DISABLED_TypedTestP, NumericTypes);
-
-#endif  // GTEST_HAS_TYPED_TEST_P
-
-// Tests that assertion macros evaluate their arguments exactly once.
-
-class SingleEvaluationTest : public Test {
- public:  // Must be public and not protected due to a bug in g++ 3.4.2.
-  // This helper function is needed by the FailedASSERT_STREQ test
-  // below.  It's public to work around C++Builder's bug with scoping local
-  // classes.
-  static void CompareAndIncrementCharPtrs() {
-    ASSERT_STREQ(p1_++, p2_++);
-  }
-
-  // This helper function is needed by the FailedASSERT_NE test below.  It's
-  // public to work around C++Builder's bug with scoping local classes.
-  static void CompareAndIncrementInts() {
-    ASSERT_NE(a_++, b_++);
-  }
-
- protected:
-  SingleEvaluationTest() {
-    p1_ = s1_;
-    p2_ = s2_;
-    a_ = 0;
-    b_ = 0;
-  }
-
-  static const char* const s1_;
-  static const char* const s2_;
-  static const char* p1_;
-  static const char* p2_;
-
-  static int a_;
-  static int b_;
-};
-
-const char* const SingleEvaluationTest::s1_ = "01234";
-const char* const SingleEvaluationTest::s2_ = "abcde";
-const char* SingleEvaluationTest::p1_;
-const char* SingleEvaluationTest::p2_;
-int SingleEvaluationTest::a_;
-int SingleEvaluationTest::b_;
-
-// Tests that when ASSERT_STREQ fails, it evaluates its arguments
-// exactly once.
-TEST_F(SingleEvaluationTest, FailedASSERT_STREQ) {
-  EXPECT_FATAL_FAILURE(SingleEvaluationTest::CompareAndIncrementCharPtrs(),
-                       "p2_++");
-  EXPECT_EQ(s1_ + 1, p1_);
-  EXPECT_EQ(s2_ + 1, p2_);
-}
-
-// Tests that string assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, ASSERT_STR) {
-  // successful EXPECT_STRNE
-  EXPECT_STRNE(p1_++, p2_++);
-  EXPECT_EQ(s1_ + 1, p1_);
-  EXPECT_EQ(s2_ + 1, p2_);
-
-  // failed EXPECT_STRCASEEQ
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASEEQ(p1_++, p2_++),
-                          "Ignoring case");
-  EXPECT_EQ(s1_ + 2, p1_);
-  EXPECT_EQ(s2_ + 2, p2_);
-}
-
-// Tests that when ASSERT_NE fails, it evaluates its arguments exactly
-// once.
-TEST_F(SingleEvaluationTest, FailedASSERT_NE) {
-  EXPECT_FATAL_FAILURE(SingleEvaluationTest::CompareAndIncrementInts(),
-                       "(a_++) != (b_++)");
-  EXPECT_EQ(1, a_);
-  EXPECT_EQ(1, b_);
-}
-
-// Tests that assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, OtherCases) {
-  // successful EXPECT_TRUE
-  EXPECT_TRUE(0 == a_++);  // NOLINT
-  EXPECT_EQ(1, a_);
-
-  // failed EXPECT_TRUE
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(-1 == a_++), "-1 == a_++");
-  EXPECT_EQ(2, a_);
-
-  // successful EXPECT_GT
-  EXPECT_GT(a_++, b_++);
-  EXPECT_EQ(3, a_);
-  EXPECT_EQ(1, b_);
-
-  // failed EXPECT_LT
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(a_++, b_++), "(a_++) < (b_++)");
-  EXPECT_EQ(4, a_);
-  EXPECT_EQ(2, b_);
-
-  // successful ASSERT_TRUE
-  ASSERT_TRUE(0 < a_++);  // NOLINT
-  EXPECT_EQ(5, a_);
-
-  // successful ASSERT_GT
-  ASSERT_GT(a_++, b_++);
-  EXPECT_EQ(6, a_);
-  EXPECT_EQ(3, b_);
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-void ThrowAnInteger() {
-  throw 1;
-}
-
-// Tests that assertion arguments are evaluated exactly once.
-TEST_F(SingleEvaluationTest, ExceptionTests) {
-  // successful EXPECT_THROW
-  EXPECT_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }, int);
-  EXPECT_EQ(1, a_);
-
-  // failed EXPECT_THROW, throws different
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }, bool), "throws a different type");
-  EXPECT_EQ(2, a_);
-
-  // failed EXPECT_THROW, throws nothing
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(a_++, bool), "throws nothing");
-  EXPECT_EQ(3, a_);
-
-  // successful EXPECT_NO_THROW
-  EXPECT_NO_THROW(a_++);
-  EXPECT_EQ(4, a_);
-
-  // failed EXPECT_NO_THROW
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  }), "it throws");
-  EXPECT_EQ(5, a_);
-
-  // successful EXPECT_ANY_THROW
-  EXPECT_ANY_THROW({  // NOLINT
-    a_++;
-    ThrowAnInteger();
-  });
-  EXPECT_EQ(6, a_);
-
-  // failed EXPECT_ANY_THROW
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(a_++), "it doesn't");
-  EXPECT_EQ(7, a_);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests {ASSERT|EXPECT}_NO_FATAL_FAILURE.
-class NoFatalFailureTest : public Test {
- protected:
-  void Succeeds() {}
-  void FailsNonFatal() {
-    ADD_FAILURE() << "some non-fatal failure";
-  }
-  void Fails() {
-    FAIL() << "some fatal failure";
-  }
-
-  void DoAssertNoFatalFailureOnFails() {
-    ASSERT_NO_FATAL_FAILURE(Fails());
-    ADD_FAILURE() << "should not reach here.";
-  }
-
-  void DoExpectNoFatalFailureOnFails() {
-    EXPECT_NO_FATAL_FAILURE(Fails());
-    ADD_FAILURE() << "other failure";
-  }
-};
-
-TEST_F(NoFatalFailureTest, NoFailure) {
-  EXPECT_NO_FATAL_FAILURE(Succeeds());
-  ASSERT_NO_FATAL_FAILURE(Succeeds());
-}
-
-TEST_F(NoFatalFailureTest, NonFatalIsNoFailure) {
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_NO_FATAL_FAILURE(FailsNonFatal()),
-      "some non-fatal failure");
-  EXPECT_NONFATAL_FAILURE(
-      ASSERT_NO_FATAL_FAILURE(FailsNonFatal()),
-      "some non-fatal failure");
-}
-
-TEST_F(NoFatalFailureTest, AssertNoFatalFailureOnFatalFailure) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    DoAssertNoFatalFailureOnFails();
-  }
-  ASSERT_EQ(2, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "some fatal failure",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "it does",
-                      gtest_failures.GetTestPartResult(1).message());
-}
-
-TEST_F(NoFatalFailureTest, ExpectNoFatalFailureOnFatalFailure) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    DoExpectNoFatalFailureOnFails();
-  }
-  ASSERT_EQ(3, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(2).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "some fatal failure",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "it does",
-                      gtest_failures.GetTestPartResult(1).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "other failure",
-                      gtest_failures.GetTestPartResult(2).message());
-}
-
-TEST_F(NoFatalFailureTest, MessageIsStreamable) {
-  TestPartResultArray gtest_failures;
-  {
-    ScopedFakeTestPartResultReporter gtest_reporter(&gtest_failures);
-    EXPECT_NO_FATAL_FAILURE(FAIL() << "foo") << "my message";
-  }
-  ASSERT_EQ(2, gtest_failures.size());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(0).type());
-  EXPECT_EQ(TestPartResult::kNonFatalFailure,
-            gtest_failures.GetTestPartResult(1).type());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "foo",
-                      gtest_failures.GetTestPartResult(0).message());
-  EXPECT_PRED_FORMAT2(testing::IsSubstring, "my message",
-                      gtest_failures.GetTestPartResult(1).message());
-}
-
-// Tests non-string assertions.
-
-std::string EditsToString(const std::vector<EditType>& edits) {
-  std::string out;
-  for (size_t i = 0; i < edits.size(); ++i) {
-    static const char kEdits[] = " +-/";
-    out.append(1, kEdits[edits[i]]);
-  }
-  return out;
-}
-
-std::vector<size_t> CharsToIndices(const std::string& str) {
-  std::vector<size_t> out;
-  for (size_t i = 0; i < str.size(); ++i) {
-    out.push_back(static_cast<size_t>(str[i]));
-  }
-  return out;
-}
-
-std::vector<std::string> CharsToLines(const std::string& str) {
-  std::vector<std::string> out;
-  for (size_t i = 0; i < str.size(); ++i) {
-    out.push_back(str.substr(i, 1));
-  }
-  return out;
-}
-
-TEST(EditDistance, TestSuites) {
-  struct Case {
-    int line;
-    const char* left;
-    const char* right;
-    const char* expected_edits;
-    const char* expected_diff;
-  };
-  static const Case kCases[] = {
-      // No change.
-      {__LINE__, "A", "A", " ", ""},
-      {__LINE__, "ABCDE", "ABCDE", "     ", ""},
-      // Simple adds.
-      {__LINE__, "X", "XA", " +", "@@ +1,2 @@\n X\n+A\n"},
-      {__LINE__, "X", "XABCD", " ++++", "@@ +1,5 @@\n X\n+A\n+B\n+C\n+D\n"},
-      // Simple removes.
-      {__LINE__, "XA", "X", " -", "@@ -1,2 @@\n X\n-A\n"},
-      {__LINE__, "XABCD", "X", " ----", "@@ -1,5 @@\n X\n-A\n-B\n-C\n-D\n"},
-      // Simple replaces.
-      {__LINE__, "A", "a", "/", "@@ -1,1 +1,1 @@\n-A\n+a\n"},
-      {__LINE__, "ABCD", "abcd", "////",
-       "@@ -1,4 +1,4 @@\n-A\n-B\n-C\n-D\n+a\n+b\n+c\n+d\n"},
-      // Path finding.
-      {__LINE__, "ABCDEFGH", "ABXEGH1", "  -/ -  +",
-       "@@ -1,8 +1,7 @@\n A\n B\n-C\n-D\n+X\n E\n-F\n G\n H\n+1\n"},
-      {__LINE__, "AAAABCCCC", "ABABCDCDC", "- /   + / ",
-       "@@ -1,9 +1,9 @@\n-A\n A\n-A\n+B\n A\n B\n C\n+D\n C\n-C\n+D\n C\n"},
-      {__LINE__, "ABCDE", "BCDCD", "-   +/",
-       "@@ -1,5 +1,5 @@\n-A\n B\n C\n D\n-E\n+C\n+D\n"},
-      {__LINE__, "ABCDEFGHIJKL", "BCDCDEFGJKLJK", "- ++     --   ++",
-       "@@ -1,4 +1,5 @@\n-A\n B\n+C\n+D\n C\n D\n"
-       "@@ -6,7 +7,7 @@\n F\n G\n-H\n-I\n J\n K\n L\n+J\n+K\n"},
-      {}};
-  for (const Case* c = kCases; c->left; ++c) {
-    EXPECT_TRUE(c->expected_edits ==
-                EditsToString(CalculateOptimalEdits(CharsToIndices(c->left),
-                                                    CharsToIndices(c->right))))
-        << "Left <" << c->left << "> Right <" << c->right << "> Edits <"
-        << EditsToString(CalculateOptimalEdits(
-               CharsToIndices(c->left), CharsToIndices(c->right))) << ">";
-    EXPECT_TRUE(c->expected_diff == CreateUnifiedDiff(CharsToLines(c->left),
-                                                      CharsToLines(c->right)))
-        << "Left <" << c->left << "> Right <" << c->right << "> Diff <"
-        << CreateUnifiedDiff(CharsToLines(c->left), CharsToLines(c->right))
-        << ">";
-  }
-}
-
-// Tests EqFailure(), used for implementing *EQ* assertions.
-TEST(AssertionTest, EqFailure) {
-  const std::string foo_val("5"), bar_val("6");
-  const std::string msg1(
-      EqFailure("foo", "bar", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: 5\n"
-      "  bar\n"
-      "    Which is: 6",
-      msg1.c_str());
-
-  const std::string msg2(
-      EqFailure("foo", "6", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: 5\n"
-      "  6",
-      msg2.c_str());
-
-  const std::string msg3(
-      EqFailure("5", "bar", foo_val, bar_val, false)
-      .failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  5\n"
-      "  bar\n"
-      "    Which is: 6",
-      msg3.c_str());
-
-  const std::string msg4(
-      EqFailure("5", "6", foo_val, bar_val, false).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  5\n"
-      "  6",
-      msg4.c_str());
-
-  const std::string msg5(
-      EqFailure("foo", "bar",
-                std::string("\"x\""), std::string("\"y\""),
-                true).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  foo\n"
-      "    Which is: \"x\"\n"
-      "  bar\n"
-      "    Which is: \"y\"\n"
-      "Ignoring case",
-      msg5.c_str());
-}
-
-TEST(AssertionTest, EqFailureWithDiff) {
-  const std::string left(
-      "1\\n2XXX\\n3\\n5\\n6\\n7\\n8\\n9\\n10\\n11\\n12XXX\\n13\\n14\\n15");
-  const std::string right(
-      "1\\n2\\n3\\n4\\n5\\n6\\n7\\n8\\n9\\n11\\n12\\n13\\n14");
-  const std::string msg1(
-      EqFailure("left", "right", left, right, false).failure_message());
-  EXPECT_STREQ(
-      "Expected equality of these values:\n"
-      "  left\n"
-      "    Which is: "
-      "1\\n2XXX\\n3\\n5\\n6\\n7\\n8\\n9\\n10\\n11\\n12XXX\\n13\\n14\\n15\n"
-      "  right\n"
-      "    Which is: 1\\n2\\n3\\n4\\n5\\n6\\n7\\n8\\n9\\n11\\n12\\n13\\n14\n"
-      "With diff:\n@@ -1,5 +1,6 @@\n 1\n-2XXX\n+2\n 3\n+4\n 5\n 6\n"
-      "@@ -7,8 +8,6 @@\n 8\n 9\n-10\n 11\n-12XXX\n+12\n 13\n 14\n-15\n",
-      msg1.c_str());
-}
-
-// Tests AppendUserMessage(), used for implementing the *EQ* macros.
-TEST(AssertionTest, AppendUserMessage) {
-  const std::string foo("foo");
-
-  Message msg;
-  EXPECT_STREQ("foo",
-               AppendUserMessage(foo, msg).c_str());
-
-  msg << "bar";
-  EXPECT_STREQ("foo\nbar",
-               AppendUserMessage(foo, msg).c_str());
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-# pragma option push -w-ccc -w-rch
-#endif
-
-// Tests ASSERT_TRUE.
-TEST(AssertionTest, ASSERT_TRUE) {
-  ASSERT_TRUE(2 > 1);  // NOLINT
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(2 < 1),
-                       "2 < 1");
-}
-
-// Tests ASSERT_TRUE(predicate) for predicates returning AssertionResult.
-TEST(AssertionTest, AssertTrueWithAssertionResult) {
-  ASSERT_TRUE(ResultIsEven(2));
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEven(3)),
-                       "Value of: ResultIsEven(3)\n"
-                       "  Actual: false (3 is odd)\n"
-                       "Expected: true");
-#endif
-  ASSERT_TRUE(ResultIsEvenNoExplanation(2));
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(ResultIsEvenNoExplanation(3)),
-                       "Value of: ResultIsEvenNoExplanation(3)\n"
-                       "  Actual: false (3 is odd)\n"
-                       "Expected: true");
-}
-
-// Tests ASSERT_FALSE.
-TEST(AssertionTest, ASSERT_FALSE) {
-  ASSERT_FALSE(2 < 1);  // NOLINT
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(2 > 1),
-                       "Value of: 2 > 1\n"
-                       "  Actual: true\n"
-                       "Expected: false");
-}
-
-// Tests ASSERT_FALSE(predicate) for predicates returning AssertionResult.
-TEST(AssertionTest, AssertFalseWithAssertionResult) {
-  ASSERT_FALSE(ResultIsEven(3));
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEven(2)),
-                       "Value of: ResultIsEven(2)\n"
-                       "  Actual: true (2 is even)\n"
-                       "Expected: false");
-#endif
-  ASSERT_FALSE(ResultIsEvenNoExplanation(3));
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(ResultIsEvenNoExplanation(2)),
-                       "Value of: ResultIsEvenNoExplanation(2)\n"
-                       "  Actual: true\n"
-                       "Expected: false");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-// Tests using ASSERT_EQ on double values.  The purpose is to make
-// sure that the specialization we did for integer and anonymous enums
-// isn't used for double arguments.
-TEST(ExpectTest, ASSERT_EQ_Double) {
-  // A success.
-  ASSERT_EQ(5.6, 5.6);
-
-  // A failure.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(5.1, 5.2),
-                       "5.1");
-}
-
-// Tests ASSERT_EQ.
-TEST(AssertionTest, ASSERT_EQ) {
-  ASSERT_EQ(5, 2 + 3);
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(5, 2*3),
-                       "Expected equality of these values:\n"
-                       "  5\n"
-                       "  2*3\n"
-                       "    Which is: 6");
-}
-
-// Tests ASSERT_EQ(NULL, pointer).
-TEST(AssertionTest, ASSERT_EQ_NULL) {
-  // A success.
-  const char* p = nullptr;
-  // Some older GCC versions may issue a spurious warning in this or the next
-  // assertion statement. This warning should not be suppressed with
-  // static_cast since the test verifies the ability to use bare NULL as the
-  // expected parameter to the macro.
-  ASSERT_EQ(nullptr, p);
-
-  // A failure.
-  static int n = 0;
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(nullptr, &n), "  &n\n    Which is:");
-}
-
-// Tests ASSERT_EQ(0, non_pointer).  Since the literal 0 can be
-// treated as a null pointer by the compiler, we need to make sure
-// that ASSERT_EQ(0, non_pointer) isn't interpreted by Google Test as
-// ASSERT_EQ(static_cast<void*>(NULL), non_pointer).
-TEST(ExpectTest, ASSERT_EQ_0) {
-  int n = 0;
-
-  // A success.
-  ASSERT_EQ(0, n);
-
-  // A failure.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(0, 5.6),
-                       "  0\n  5.6");
-}
-
-// Tests ASSERT_NE.
-TEST(AssertionTest, ASSERT_NE) {
-  ASSERT_NE(6, 7);
-  EXPECT_FATAL_FAILURE(ASSERT_NE('a', 'a'),
-                       "Expected: ('a') != ('a'), "
-                       "actual: 'a' (97, 0x61) vs 'a' (97, 0x61)");
-}
-
-// Tests ASSERT_LE.
-TEST(AssertionTest, ASSERT_LE) {
-  ASSERT_LE(2, 3);
-  ASSERT_LE(2, 2);
-  EXPECT_FATAL_FAILURE(ASSERT_LE(2, 0),
-                       "Expected: (2) <= (0), actual: 2 vs 0");
-}
-
-// Tests ASSERT_LT.
-TEST(AssertionTest, ASSERT_LT) {
-  ASSERT_LT(2, 3);
-  EXPECT_FATAL_FAILURE(ASSERT_LT(2, 2),
-                       "Expected: (2) < (2), actual: 2 vs 2");
-}
-
-// Tests ASSERT_GE.
-TEST(AssertionTest, ASSERT_GE) {
-  ASSERT_GE(2, 1);
-  ASSERT_GE(2, 2);
-  EXPECT_FATAL_FAILURE(ASSERT_GE(2, 3),
-                       "Expected: (2) >= (3), actual: 2 vs 3");
-}
-
-// Tests ASSERT_GT.
-TEST(AssertionTest, ASSERT_GT) {
-  ASSERT_GT(2, 1);
-  EXPECT_FATAL_FAILURE(ASSERT_GT(2, 2),
-                       "Expected: (2) > (2), actual: 2 vs 2");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-void ThrowNothing() {}
-
-// Tests ASSERT_THROW.
-TEST(AssertionTest, ASSERT_THROW) {
-  ASSERT_THROW(ThrowAnInteger(), int);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(
-      ASSERT_THROW(ThrowAnInteger(), bool),
-      "Expected: ThrowAnInteger() throws an exception of type bool.\n"
-      "  Actual: it throws a different type.");
-# endif
-
-  EXPECT_FATAL_FAILURE(
-      ASSERT_THROW(ThrowNothing(), bool),
-      "Expected: ThrowNothing() throws an exception of type bool.\n"
-      "  Actual: it throws nothing.");
-}
-
-// Tests ASSERT_NO_THROW.
-TEST(AssertionTest, ASSERT_NO_THROW) {
-  ASSERT_NO_THROW(ThrowNothing());
-  EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowAnInteger()),
-                       "Expected: ThrowAnInteger() doesn't throw an exception."
-                       "\n  Actual: it throws.");
-}
-
-// Tests ASSERT_ANY_THROW.
-TEST(AssertionTest, ASSERT_ANY_THROW) {
-  ASSERT_ANY_THROW(ThrowAnInteger());
-  EXPECT_FATAL_FAILURE(
-      ASSERT_ANY_THROW(ThrowNothing()),
-      "Expected: ThrowNothing() throws an exception.\n"
-      "  Actual: it doesn't.");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Makes sure we deal with the precedence of <<.  This test should
-// compile.
-TEST(AssertionTest, AssertPrecedence) {
-  ASSERT_EQ(1 < 2, true);
-  bool false_value = false;
-  ASSERT_EQ(true && false_value, false);
-}
-
-// A subroutine used by the following test.
-void TestEq1(int x) {
-  ASSERT_EQ(1, x);
-}
-
-// Tests calling a test subroutine that's not part of a fixture.
-TEST(AssertionTest, NonFixtureSubroutine) {
-  EXPECT_FATAL_FAILURE(TestEq1(2),
-                       "  x\n    Which is: 2");
-}
-
-// An uncopyable class.
-class Uncopyable {
- public:
-  explicit Uncopyable(int a_value) : value_(a_value) {}
-
-  int value() const { return value_; }
-  bool operator==(const Uncopyable& rhs) const {
-    return value() == rhs.value();
-  }
- private:
-  // This constructor deliberately has no implementation, as we don't
-  // want this class to be copyable.
-  Uncopyable(const Uncopyable&);  // NOLINT
-
-  int value_;
-};
-
-::std::ostream& operator<<(::std::ostream& os, const Uncopyable& value) {
-  return os << value.value();
-}
-
-
-bool IsPositiveUncopyable(const Uncopyable& x) {
-  return x.value() > 0;
-}
-
-// A subroutine used by the following test.
-void TestAssertNonPositive() {
-  Uncopyable y(-1);
-  ASSERT_PRED1(IsPositiveUncopyable, y);
-}
-// A subroutine used by the following test.
-void TestAssertEqualsUncopyable() {
-  Uncopyable x(5);
-  Uncopyable y(-1);
-  ASSERT_EQ(x, y);
-}
-
-// Tests that uncopyable objects can be used in assertions.
-TEST(AssertionTest, AssertWorksWithUncopyableObject) {
-  Uncopyable x(5);
-  ASSERT_PRED1(IsPositiveUncopyable, x);
-  ASSERT_EQ(x, x);
-  EXPECT_FATAL_FAILURE(TestAssertNonPositive(),
-    "IsPositiveUncopyable(y) evaluates to false, where\ny evaluates to -1");
-  EXPECT_FATAL_FAILURE(TestAssertEqualsUncopyable(),
-                       "Expected equality of these values:\n"
-                       "  x\n    Which is: 5\n  y\n    Which is: -1");
-}
-
-// Tests that uncopyable objects can be used in expects.
-TEST(AssertionTest, ExpectWorksWithUncopyableObject) {
-  Uncopyable x(5);
-  EXPECT_PRED1(IsPositiveUncopyable, x);
-  Uncopyable y(-1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_PRED1(IsPositiveUncopyable, y),
-    "IsPositiveUncopyable(y) evaluates to false, where\ny evaluates to -1");
-  EXPECT_EQ(x, x);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y),
-                          "Expected equality of these values:\n"
-                          "  x\n    Which is: 5\n  y\n    Which is: -1");
-}
-
-enum NamedEnum {
-  kE1 = 0,
-  kE2 = 1
-};
-
-TEST(AssertionTest, NamedEnum) {
-  EXPECT_EQ(kE1, kE1);
-  EXPECT_LT(kE1, kE2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(kE1, kE2), "Which is: 0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(kE1, kE2), "Which is: 1");
-}
-
-// Sun Studio and HP aCC2reject this code.
-#if !defined(__SUNPRO_CC) && !defined(__HP_aCC)
-
-// Tests using assertions with anonymous enums.
-enum {
-  kCaseA = -1,
-
-# if GTEST_OS_LINUX
-
-  // We want to test the case where the size of the anonymous enum is
-  // larger than sizeof(int), to make sure our implementation of the
-  // assertions doesn't truncate the enums.  However, MSVC
-  // (incorrectly) doesn't allow an enum value to exceed the range of
-  // an int, so this has to be conditionally compiled.
-  //
-  // On Linux, kCaseB and kCaseA have the same value when truncated to
-  // int size.  We want to test whether this will confuse the
-  // assertions.
-  kCaseB = testing::internal::kMaxBiggestInt,
-
-# else
-
-  kCaseB = INT_MAX,
-
-# endif  // GTEST_OS_LINUX
-
-  kCaseC = 42
-};
-
-TEST(AssertionTest, AnonymousEnum) {
-# if GTEST_OS_LINUX
-
-  EXPECT_EQ(static_cast<int>(kCaseA), static_cast<int>(kCaseB));
-
-# endif  // GTEST_OS_LINUX
-
-  EXPECT_EQ(kCaseA, kCaseA);
-  EXPECT_NE(kCaseA, kCaseB);
-  EXPECT_LT(kCaseA, kCaseB);
-  EXPECT_LE(kCaseA, kCaseB);
-  EXPECT_GT(kCaseB, kCaseA);
-  EXPECT_GE(kCaseA, kCaseA);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(kCaseA, kCaseB),
-                          "(kCaseA) >= (kCaseB)");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(kCaseA, kCaseC),
-                          "-1 vs 42");
-
-  ASSERT_EQ(kCaseA, kCaseA);
-  ASSERT_NE(kCaseA, kCaseB);
-  ASSERT_LT(kCaseA, kCaseB);
-  ASSERT_LE(kCaseA, kCaseB);
-  ASSERT_GT(kCaseB, kCaseA);
-  ASSERT_GE(kCaseA, kCaseA);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseB),
-                       "  kCaseB\n    Which is: ");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseC),
-                       "\n    Which is: 42");
-# endif
-
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(kCaseA, kCaseC),
-                       "\n    Which is: -1");
-}
-
-#endif  // !GTEST_OS_MAC && !defined(__SUNPRO_CC)
-
-#if GTEST_OS_WINDOWS
-
-static HRESULT UnexpectedHRESULTFailure() {
-  return E_UNEXPECTED;
-}
-
-static HRESULT OkHRESULTSuccess() {
-  return S_OK;
-}
-
-static HRESULT FalseHRESULTSuccess() {
-  return S_FALSE;
-}
-
-// HRESULT assertion tests test both zero and non-zero
-// success codes as well as failure message for each.
-//
-// Windows CE doesn't support message texts.
-TEST(HRESULTAssertionTest, EXPECT_HRESULT_SUCCEEDED) {
-  EXPECT_HRESULT_SUCCEEDED(S_OK);
-  EXPECT_HRESULT_SUCCEEDED(S_FALSE);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_SUCCEEDED(UnexpectedHRESULTFailure()),
-    "Expected: (UnexpectedHRESULTFailure()) succeeds.\n"
-    "  Actual: 0x8000FFFF");
-}
-
-TEST(HRESULTAssertionTest, ASSERT_HRESULT_SUCCEEDED) {
-  ASSERT_HRESULT_SUCCEEDED(S_OK);
-  ASSERT_HRESULT_SUCCEEDED(S_FALSE);
-
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_SUCCEEDED(UnexpectedHRESULTFailure()),
-    "Expected: (UnexpectedHRESULTFailure()) succeeds.\n"
-    "  Actual: 0x8000FFFF");
-}
-
-TEST(HRESULTAssertionTest, EXPECT_HRESULT_FAILED) {
-  EXPECT_HRESULT_FAILED(E_UNEXPECTED);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_FAILED(OkHRESULTSuccess()),
-    "Expected: (OkHRESULTSuccess()) fails.\n"
-    "  Actual: 0x0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_HRESULT_FAILED(FalseHRESULTSuccess()),
-    "Expected: (FalseHRESULTSuccess()) fails.\n"
-    "  Actual: 0x1");
-}
-
-TEST(HRESULTAssertionTest, ASSERT_HRESULT_FAILED) {
-  ASSERT_HRESULT_FAILED(E_UNEXPECTED);
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_FAILED(OkHRESULTSuccess()),
-    "Expected: (OkHRESULTSuccess()) fails.\n"
-    "  Actual: 0x0");
-# endif
-
-  EXPECT_FATAL_FAILURE(ASSERT_HRESULT_FAILED(FalseHRESULTSuccess()),
-    "Expected: (FalseHRESULTSuccess()) fails.\n"
-    "  Actual: 0x1");
-}
-
-// Tests that streaming to the HRESULT macros works.
-TEST(HRESULTAssertionTest, Streaming) {
-  EXPECT_HRESULT_SUCCEEDED(S_OK) << "unexpected failure";
-  ASSERT_HRESULT_SUCCEEDED(S_OK) << "unexpected failure";
-  EXPECT_HRESULT_FAILED(E_UNEXPECTED) << "unexpected failure";
-  ASSERT_HRESULT_FAILED(E_UNEXPECTED) << "unexpected failure";
-
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_HRESULT_SUCCEEDED(E_UNEXPECTED) << "expected failure",
-      "expected failure");
-
-# ifndef __BORLANDC__
-
-  // ICE's in C++Builder 2007 and 2009.
-  EXPECT_FATAL_FAILURE(
-      ASSERT_HRESULT_SUCCEEDED(E_UNEXPECTED) << "expected failure",
-      "expected failure");
-# endif
-
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_HRESULT_FAILED(S_OK) << "expected failure",
-      "expected failure");
-
-  EXPECT_FATAL_FAILURE(
-      ASSERT_HRESULT_FAILED(S_OK) << "expected failure",
-      "expected failure");
-}
-
-#endif  // GTEST_OS_WINDOWS
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-# pragma option push -w-ccc -w-rch
-#endif
-
-// Tests that the assertion macros behave like single statements.
-TEST(AssertionSyntaxTest, BasicAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    ASSERT_TRUE(false) << "This should never be executed; "
-                          "It's a compilation test only.";
-
-  if (AlwaysTrue())
-    EXPECT_FALSE(false);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_LT(1, 3);
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    EXPECT_GT(3, 2) << "";
-}
-
-#if GTEST_HAS_EXCEPTIONS
-// Tests that the compiler will not complain about unreachable code in the
-// EXPECT_THROW/EXPECT_ANY_THROW/EXPECT_NO_THROW macros.
-TEST(ExpectThrowTest, DoesNotGenerateUnreachableCodeWarning) {
-  int n = 0;
-
-  EXPECT_THROW(throw 1, int);
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(n++, int), "");
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(throw 1, const char*), "");
-  EXPECT_NO_THROW(n++);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(throw 1), "");
-  EXPECT_ANY_THROW(throw 1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(n++), "");
-}
-
-TEST(AssertionSyntaxTest, ExceptionAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    EXPECT_THROW(ThrowNothing(), bool);
-
-  if (AlwaysTrue())
-    EXPECT_THROW(ThrowAnInteger(), int);
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    EXPECT_NO_THROW(ThrowAnInteger());
-
-  if (AlwaysTrue())
-    EXPECT_NO_THROW(ThrowNothing());
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    EXPECT_ANY_THROW(ThrowNothing());
-
-  if (AlwaysTrue())
-    EXPECT_ANY_THROW(ThrowAnInteger());
-  else
-    ;  // NOLINT
-}
-#endif  // GTEST_HAS_EXCEPTIONS
-
-TEST(AssertionSyntaxTest, NoFatalFailureAssertionsBehavesLikeSingleStatement) {
-  if (AlwaysFalse())
-    EXPECT_NO_FATAL_FAILURE(FAIL()) << "This should never be executed. "
-                                    << "It's a compilation test only.";
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ASSERT_NO_FATAL_FAILURE(FAIL()) << "";
-  else
-    ;  // NOLINT
-
-  if (AlwaysTrue())
-    EXPECT_NO_FATAL_FAILURE(SUCCEED());
-  else
-    ;  // NOLINT
-
-  if (AlwaysFalse())
-    ;  // NOLINT
-  else
-    ASSERT_NO_FATAL_FAILURE(SUCCEED());
-}
-
-// Tests that the assertion macros work well with switch statements.
-TEST(AssertionSyntaxTest, WorksWithSwitch) {
-  switch (0) {
-    case 1:
-      break;
-    default:
-      ASSERT_TRUE(true);
-  }
-
-  switch (0)
-    case 0:
-      EXPECT_FALSE(false) << "EXPECT_FALSE failed in switch case";
-
-  // Binary assertions are implemented using a different code path
-  // than the Boolean assertions.  Hence we test them separately.
-  switch (0) {
-    case 1:
-    default:
-      ASSERT_EQ(1, 1) << "ASSERT_EQ failed in default switch handler";
-  }
-
-  switch (0)
-    case 0:
-      EXPECT_NE(1, 2);
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-void ThrowAString() {
-    throw "std::string";
-}
-
-// Test that the exception assertion macros compile and work with const
-// type qualifier.
-TEST(AssertionSyntaxTest, WorksWithConst) {
-    ASSERT_THROW(ThrowAString(), const char*);
-
-    EXPECT_THROW(ThrowAString(), const char*);
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-}  // namespace
-
-namespace testing {
-
-// Tests that Google Test tracks SUCCEED*.
-TEST(SuccessfulAssertionTest, SUCCEED) {
-  SUCCEED();
-  SUCCEED() << "OK";
-  EXPECT_EQ(2, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful EXPECT_*.
-TEST(SuccessfulAssertionTest, EXPECT) {
-  EXPECT_TRUE(true);
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful EXPECT_STR*.
-TEST(SuccessfulAssertionTest, EXPECT_STR) {
-  EXPECT_STREQ("", "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful ASSERT_*.
-TEST(SuccessfulAssertionTest, ASSERT) {
-  ASSERT_TRUE(true);
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-// Tests that Google Test doesn't track successful ASSERT_STR*.
-TEST(SuccessfulAssertionTest, ASSERT_STR) {
-  ASSERT_STREQ("", "");
-  EXPECT_EQ(0, GetUnitTestImpl()->current_test_result()->total_part_count());
-}
-
-}  // namespace testing
-
-namespace {
-
-// Tests the message streaming variation of assertions.
-
-TEST(AssertionWithMessageTest, EXPECT) {
-  EXPECT_EQ(1, 1) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(1, 1) << "Expected failure #1.",
-                          "Expected failure #1");
-  EXPECT_LE(1, 2) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(1, 0) << "Expected failure #2.",
-                          "Expected failure #2.");
-  EXPECT_GE(1, 0) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(1, 2) << "Expected failure #3.",
-                          "Expected failure #3.");
-
-  EXPECT_STREQ("1", "1") << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE("1", "1") << "Expected failure #4.",
-                          "Expected failure #4.");
-  EXPECT_STRCASEEQ("a", "A") << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASENE("a", "A") << "Expected failure #5.",
-                          "Expected failure #5.");
-
-  EXPECT_FLOAT_EQ(1, 1) << "This should succeed.";
-  EXPECT_NONFATAL_FAILURE(EXPECT_DOUBLE_EQ(1, 1.2) << "Expected failure #6.",
-                          "Expected failure #6.");
-  EXPECT_NEAR(1, 1.1, 0.2) << "This should succeed.";
-}
-
-TEST(AssertionWithMessageTest, ASSERT) {
-  ASSERT_EQ(1, 1) << "This should succeed.";
-  ASSERT_NE(1, 2) << "This should succeed.";
-  ASSERT_LE(1, 2) << "This should succeed.";
-  ASSERT_LT(1, 2) << "This should succeed.";
-  ASSERT_GE(1, 0) << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_GT(1, 2) << "Expected failure.",
-                       "Expected failure.");
-}
-
-TEST(AssertionWithMessageTest, ASSERT_STR) {
-  ASSERT_STREQ("1", "1") << "This should succeed.";
-  ASSERT_STRNE("1", "2") << "This should succeed.";
-  ASSERT_STRCASEEQ("a", "A") << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("a", "A") << "Expected failure.",
-                       "Expected failure.");
-}
-
-TEST(AssertionWithMessageTest, ASSERT_FLOATING) {
-  ASSERT_FLOAT_EQ(1, 1) << "This should succeed.";
-  ASSERT_DOUBLE_EQ(1, 1) << "This should succeed.";
-  EXPECT_FATAL_FAILURE(ASSERT_NEAR(1,1.2, 0.1) << "Expect failure.",  // NOLINT
-                       "Expect failure.");
-  // To work around a bug in gcc 2.95.0, there is intentionally no
-  // space after the first comma in the previous statement.
-}
-
-// Tests using ASSERT_FALSE with a streamed message.
-TEST(AssertionWithMessageTest, ASSERT_FALSE) {
-  ASSERT_FALSE(false) << "This shouldn't fail.";
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_FALSE(true) << "Expected failure: " << 2 << " > " << 1
-                       << " evaluates to " << true;
-  }, "Expected failure");
-}
-
-// Tests using FAIL with a streamed message.
-TEST(AssertionWithMessageTest, FAIL) {
-  EXPECT_FATAL_FAILURE(FAIL() << 0,
-                       "0");
-}
-
-// Tests using SUCCEED with a streamed message.
-TEST(AssertionWithMessageTest, SUCCEED) {
-  SUCCEED() << "Success == " << 1;
-}
-
-// Tests using ASSERT_TRUE with a streamed message.
-TEST(AssertionWithMessageTest, ASSERT_TRUE) {
-  ASSERT_TRUE(true) << "This should succeed.";
-  ASSERT_TRUE(true) << true;
-  EXPECT_FATAL_FAILURE(
-      {  // NOLINT
-        ASSERT_TRUE(false) << static_cast<const char*>(nullptr)
-                           << static_cast<char*>(nullptr);
-      },
-      "(null)(null)");
-}
-
-#if GTEST_OS_WINDOWS
-// Tests using wide strings in assertion messages.
-TEST(AssertionWithMessageTest, WideStringMessage) {
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_TRUE(false) << L"This failure is expected.\x8119";
-  }, "This failure is expected.");
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EQ(1, 2) << "This failure is "
-                    << L"expected too.\x8120";
-  }, "This failure is expected too.");
-}
-#endif  // GTEST_OS_WINDOWS
-
-// Tests EXPECT_TRUE.
-TEST(ExpectTest, EXPECT_TRUE) {
-  EXPECT_TRUE(true) << "Intentional success";
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "Intentional failure #1.",
-                          "Intentional failure #1.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "Intentional failure #2.",
-                          "Intentional failure #2.");
-  EXPECT_TRUE(2 > 1);  // NOLINT
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(2 < 1),
-                          "Value of: 2 < 1\n"
-                          "  Actual: false\n"
-                          "Expected: true");
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(2 > 3),
-                          "2 > 3");
-}
-
-// Tests EXPECT_TRUE(predicate) for predicates returning AssertionResult.
-TEST(ExpectTest, ExpectTrueWithAssertionResult) {
-  EXPECT_TRUE(ResultIsEven(2));
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(ResultIsEven(3)),
-                          "Value of: ResultIsEven(3)\n"
-                          "  Actual: false (3 is odd)\n"
-                          "Expected: true");
-  EXPECT_TRUE(ResultIsEvenNoExplanation(2));
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(ResultIsEvenNoExplanation(3)),
-                          "Value of: ResultIsEvenNoExplanation(3)\n"
-                          "  Actual: false (3 is odd)\n"
-                          "Expected: true");
-}
-
-// Tests EXPECT_FALSE with a streamed message.
-TEST(ExpectTest, EXPECT_FALSE) {
-  EXPECT_FALSE(2 < 1);  // NOLINT
-  EXPECT_FALSE(false) << "Intentional success";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "Intentional failure #1.",
-                          "Intentional failure #1.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "Intentional failure #2.",
-                          "Intentional failure #2.");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(2 > 1),
-                          "Value of: 2 > 1\n"
-                          "  Actual: true\n"
-                          "Expected: false");
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(2 < 3),
-                          "2 < 3");
-}
-
-// Tests EXPECT_FALSE(predicate) for predicates returning AssertionResult.
-TEST(ExpectTest, ExpectFalseWithAssertionResult) {
-  EXPECT_FALSE(ResultIsEven(3));
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(ResultIsEven(2)),
-                          "Value of: ResultIsEven(2)\n"
-                          "  Actual: true (2 is even)\n"
-                          "Expected: false");
-  EXPECT_FALSE(ResultIsEvenNoExplanation(3));
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(ResultIsEvenNoExplanation(2)),
-                          "Value of: ResultIsEvenNoExplanation(2)\n"
-                          "  Actual: true\n"
-                          "Expected: false");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-// Tests EXPECT_EQ.
-TEST(ExpectTest, EXPECT_EQ) {
-  EXPECT_EQ(5, 2 + 3);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5, 2*3),
-                          "Expected equality of these values:\n"
-                          "  5\n"
-                          "  2*3\n"
-                          "    Which is: 6");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5, 2 - 3),
-                          "2 - 3");
-}
-
-// Tests using EXPECT_EQ on double values.  The purpose is to make
-// sure that the specialization we did for integer and anonymous enums
-// isn't used for double arguments.
-TEST(ExpectTest, EXPECT_EQ_Double) {
-  // A success.
-  EXPECT_EQ(5.6, 5.6);
-
-  // A failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(5.1, 5.2),
-                          "5.1");
-}
-
-// Tests EXPECT_EQ(NULL, pointer).
-TEST(ExpectTest, EXPECT_EQ_NULL) {
-  // A success.
-  const char* p = nullptr;
-  // Some older GCC versions may issue a spurious warning in this or the next
-  // assertion statement. This warning should not be suppressed with
-  // static_cast since the test verifies the ability to use bare NULL as the
-  // expected parameter to the macro.
-  EXPECT_EQ(nullptr, p);
-
-  // A failure.
-  int n = 0;
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(nullptr, &n), "  &n\n    Which is:");
-}
-
-// Tests EXPECT_EQ(0, non_pointer).  Since the literal 0 can be
-// treated as a null pointer by the compiler, we need to make sure
-// that EXPECT_EQ(0, non_pointer) isn't interpreted by Google Test as
-// EXPECT_EQ(static_cast<void*>(NULL), non_pointer).
-TEST(ExpectTest, EXPECT_EQ_0) {
-  int n = 0;
-
-  // A success.
-  EXPECT_EQ(0, n);
-
-  // A failure.
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(0, 5.6),
-                          "  0\n  5.6");
-}
-
-// Tests EXPECT_NE.
-TEST(ExpectTest, EXPECT_NE) {
-  EXPECT_NE(6, 7);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE('a', 'a'),
-                          "Expected: ('a') != ('a'), "
-                          "actual: 'a' (97, 0x61) vs 'a' (97, 0x61)");
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(2, 2),
-                          "2");
-  char* const p0 = nullptr;
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(p0, p0),
-                          "p0");
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  char* const p1 = reinterpret_cast<char*>(pv1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_NE(p1, p1),
-                          "p1");
-}
-
-// Tests EXPECT_LE.
-TEST(ExpectTest, EXPECT_LE) {
-  EXPECT_LE(2, 3);
-  EXPECT_LE(2, 2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_LE(2, 0),
-                          "Expected: (2) <= (0), actual: 2 vs 0");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LE(1.1, 0.9),
-                          "(1.1) <= (0.9)");
-}
-
-// Tests EXPECT_LT.
-TEST(ExpectTest, EXPECT_LT) {
-  EXPECT_LT(2, 3);
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 2),
-                          "Expected: (2) < (2), actual: 2 vs 2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 1),
-                          "(2) < (1)");
-}
-
-// Tests EXPECT_GE.
-TEST(ExpectTest, EXPECT_GE) {
-  EXPECT_GE(2, 1);
-  EXPECT_GE(2, 2);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(2, 3),
-                          "Expected: (2) >= (3), actual: 2 vs 3");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GE(0.9, 1.1),
-                          "(0.9) >= (1.1)");
-}
-
-// Tests EXPECT_GT.
-TEST(ExpectTest, EXPECT_GT) {
-  EXPECT_GT(2, 1);
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(2, 2),
-                          "Expected: (2) > (2), actual: 2 vs 2");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(2, 3),
-                          "(2) > (3)");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-// Tests EXPECT_THROW.
-TEST(ExpectTest, EXPECT_THROW) {
-  EXPECT_THROW(ThrowAnInteger(), int);
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(ThrowAnInteger(), bool),
-                          "Expected: ThrowAnInteger() throws an exception of "
-                          "type bool.\n  Actual: it throws a different type.");
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_THROW(ThrowNothing(), bool),
-      "Expected: ThrowNothing() throws an exception of type bool.\n"
-      "  Actual: it throws nothing.");
-}
-
-// Tests EXPECT_NO_THROW.
-TEST(ExpectTest, EXPECT_NO_THROW) {
-  EXPECT_NO_THROW(ThrowNothing());
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowAnInteger()),
-                          "Expected: ThrowAnInteger() doesn't throw an "
-                          "exception.\n  Actual: it throws.");
-}
-
-// Tests EXPECT_ANY_THROW.
-TEST(ExpectTest, EXPECT_ANY_THROW) {
-  EXPECT_ANY_THROW(ThrowAnInteger());
-  EXPECT_NONFATAL_FAILURE(
-      EXPECT_ANY_THROW(ThrowNothing()),
-      "Expected: ThrowNothing() throws an exception.\n"
-      "  Actual: it doesn't.");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Make sure we deal with the precedence of <<.
-TEST(ExpectTest, ExpectPrecedence) {
-  EXPECT_EQ(1 < 2, true);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(true, true && false),
-                          "  true && false\n    Which is: false");
-}
-
-
-// Tests the StreamableToString() function.
-
-// Tests using StreamableToString() on a scalar.
-TEST(StreamableToStringTest, Scalar) {
-  EXPECT_STREQ("5", StreamableToString(5).c_str());
-}
-
-// Tests using StreamableToString() on a non-char pointer.
-TEST(StreamableToStringTest, Pointer) {
-  int n = 0;
-  int* p = &n;
-  EXPECT_STRNE("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using StreamableToString() on a NULL non-char pointer.
-TEST(StreamableToStringTest, NullPointer) {
-  int* p = nullptr;
-  EXPECT_STREQ("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using StreamableToString() on a C string.
-TEST(StreamableToStringTest, CString) {
-  EXPECT_STREQ("Foo", StreamableToString("Foo").c_str());
-}
-
-// Tests using StreamableToString() on a NULL C string.
-TEST(StreamableToStringTest, NullCString) {
-  char* p = nullptr;
-  EXPECT_STREQ("(null)", StreamableToString(p).c_str());
-}
-
-// Tests using streamable values as assertion messages.
-
-// Tests using std::string as an assertion message.
-TEST(StreamableTest, string) {
-  static const std::string str(
-      "This failure message is a std::string, and is expected.");
-  EXPECT_FATAL_FAILURE(FAIL() << str,
-                       str.c_str());
-}
-
-// Tests that we can output strings containing embedded NULs.
-// Limited to Linux because we can only do this with std::string's.
-TEST(StreamableTest, stringWithEmbeddedNUL) {
-  static const char char_array_with_nul[] =
-      "Here's a NUL\0 and some more string";
-  static const std::string string_with_nul(char_array_with_nul,
-                                           sizeof(char_array_with_nul)
-                                           - 1);  // drops the trailing NUL
-  EXPECT_FATAL_FAILURE(FAIL() << string_with_nul,
-                       "Here's a NUL\\0 and some more string");
-}
-
-// Tests that we can output a NUL char.
-TEST(StreamableTest, NULChar) {
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    FAIL() << "A NUL" << '\0' << " and some more string";
-  }, "A NUL\\0 and some more string");
-}
-
-// Tests using int as an assertion message.
-TEST(StreamableTest, int) {
-  EXPECT_FATAL_FAILURE(FAIL() << 900913,
-                       "900913");
-}
-
-// Tests using NULL char pointer as an assertion message.
-//
-// In MSVC, streaming a NULL char * causes access violation.  Google Test
-// implemented a workaround (substituting "(null)" for NULL).  This
-// tests whether the workaround works.
-TEST(StreamableTest, NullCharPtr) {
-  EXPECT_FATAL_FAILURE(FAIL() << static_cast<const char*>(nullptr), "(null)");
-}
-
-// Tests that basic IO manipulators (endl, ends, and flush) can be
-// streamed to testing::Message.
-TEST(StreamableTest, BasicIoManip) {
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    FAIL() << "Line 1." << std::endl
-           << "A NUL char " << std::ends << std::flush << " in line 2.";
-  }, "Line 1.\nA NUL char \\0 in line 2.");
-}
-
-// Tests the macros that haven't been covered so far.
-
-void AddFailureHelper(bool* aborted) {
-  *aborted = true;
-  ADD_FAILURE() << "Intentional failure.";
-  *aborted = false;
-}
-
-// Tests ADD_FAILURE.
-TEST(MacroTest, ADD_FAILURE) {
-  bool aborted = true;
-  EXPECT_NONFATAL_FAILURE(AddFailureHelper(&aborted),
-                          "Intentional failure.");
-  EXPECT_FALSE(aborted);
-}
-
-// Tests ADD_FAILURE_AT.
-TEST(MacroTest, ADD_FAILURE_AT) {
-  // Verifies that ADD_FAILURE_AT does generate a nonfatal failure and
-  // the failure message contains the user-streamed part.
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE_AT("foo.cc", 42) << "Wrong!", "Wrong!");
-
-  // Verifies that the user-streamed part is optional.
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE_AT("foo.cc", 42), "Failed");
-
-  // Unfortunately, we cannot verify that the failure message contains
-  // the right file path and line number the same way, as
-  // EXPECT_NONFATAL_FAILURE() doesn't get to see the file path and
-  // line number.  Instead, we do that in googletest-output-test_.cc.
-}
-
-// Tests FAIL.
-TEST(MacroTest, FAIL) {
-  EXPECT_FATAL_FAILURE(FAIL(),
-                       "Failed");
-  EXPECT_FATAL_FAILURE(FAIL() << "Intentional failure.",
-                       "Intentional failure.");
-}
-
-// Tests GTEST_FAIL_AT.
-TEST(MacroTest, GTEST_FAIL_AT) {
-  // Verifies that GTEST_FAIL_AT does generate a fatal failure and
-  // the failure message contains the user-streamed part.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL_AT("foo.cc", 42) << "Wrong!", "Wrong!");
-
-  // Verifies that the user-streamed part is optional.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL_AT("foo.cc", 42), "Failed");
-
-  // See the ADD_FAIL_AT test above to see how we test that the failure message
-  // contains the right filename and line number -- the same applies here.
-}
-
-// Tests SUCCEED
-TEST(MacroTest, SUCCEED) {
-  SUCCEED();
-  SUCCEED() << "Explicit success.";
-}
-
-// Tests for EXPECT_EQ() and ASSERT_EQ().
-//
-// These tests fail *intentionally*, s.t. the failure messages can be
-// generated and tested.
-//
-// We have different tests for different argument types.
-
-// Tests using bool values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Bool) {
-  EXPECT_EQ(true,  true);
-  EXPECT_FATAL_FAILURE({
-      bool false_value = false;
-      ASSERT_EQ(false_value, true);
-    }, "  false_value\n    Which is: false\n  true");
-}
-
-// Tests using int values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Int) {
-  ASSERT_EQ(32, 32);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(32, 33),
-                          "  32\n  33");
-}
-
-// Tests using time_t values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Time_T) {
-  EXPECT_EQ(static_cast<time_t>(0),
-            static_cast<time_t>(0));
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<time_t>(0),
-                                 static_cast<time_t>(1234)),
-                       "1234");
-}
-
-// Tests using char values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, Char) {
-  ASSERT_EQ('z', 'z');
-  const char ch = 'b';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ('\0', ch),
-                          "  ch\n    Which is: 'b'");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ('a', ch),
-                          "  ch\n    Which is: 'b'");
-}
-
-// Tests using wchar_t values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, WideChar) {
-  EXPECT_EQ(L'b', L'b');
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(L'\0', L'x'),
-                          "Expected equality of these values:\n"
-                          "  L'\0'\n"
-                          "    Which is: L'\0' (0, 0x0)\n"
-                          "  L'x'\n"
-                          "    Which is: L'x' (120, 0x78)");
-
-  static wchar_t wchar;
-  wchar = L'b';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(L'a', wchar),
-                          "wchar");
-  wchar = 0x8119;
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<wchar_t>(0x8120), wchar),
-                       "  wchar\n    Which is: L'");
-}
-
-// Tests using ::std::string values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, StdString) {
-  // Compares a const char* to an std::string that has identical
-  // content.
-  ASSERT_EQ("Test", ::std::string("Test"));
-
-  // Compares two identical std::strings.
-  static const ::std::string str1("A * in the middle");
-  static const ::std::string str2(str1);
-  EXPECT_EQ(str1, str2);
-
-  // Compares a const char* to an std::string that has different
-  // content
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ("Test", ::std::string("test")),
-                          "\"test\"");
-
-  // Compares an std::string to a char* that has different content.
-  char* const p1 = const_cast<char*>("foo");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(::std::string("bar"), p1),
-                          "p1");
-
-  // Compares two std::strings that have different contents, one of
-  // which having a NUL character in the middle.  This should fail.
-  static ::std::string str3(str1);
-  str3.at(2) = '\0';
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(str1, str3),
-                       "  str3\n    Which is: \"A \\0 in the middle\"");
-}
-
-#if GTEST_HAS_STD_WSTRING
-
-// Tests using ::std::wstring values in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, StdWideString) {
-  // Compares two identical std::wstrings.
-  const ::std::wstring wstr1(L"A * in the middle");
-  const ::std::wstring wstr2(wstr1);
-  ASSERT_EQ(wstr1, wstr2);
-
-  // Compares an std::wstring to a const wchar_t* that has identical
-  // content.
-  const wchar_t kTestX8119[] = { 'T', 'e', 's', 't', 0x8119, '\0' };
-  EXPECT_EQ(::std::wstring(kTestX8119), kTestX8119);
-
-  // Compares an std::wstring to a const wchar_t* that has different
-  // content.
-  const wchar_t kTestX8120[] = { 'T', 'e', 's', 't', 0x8120, '\0' };
-  EXPECT_NONFATAL_FAILURE({  // NOLINT
-    EXPECT_EQ(::std::wstring(kTestX8119), kTestX8120);
-  }, "kTestX8120");
-
-  // Compares two std::wstrings that have different contents, one of
-  // which having a NUL character in the middle.
-  ::std::wstring wstr3(wstr1);
-  wstr3.at(2) = L'\0';
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(wstr1, wstr3),
-                          "wstr3");
-
-  // Compares a wchar_t* to an std::wstring that has different
-  // content.
-  EXPECT_FATAL_FAILURE({  // NOLINT
-    ASSERT_EQ(const_cast<wchar_t*>(L"foo"), ::std::wstring(L"bar"));
-  }, "");
-}
-
-#endif  // GTEST_HAS_STD_WSTRING
-
-// Tests using char pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, CharPointer) {
-  char* const p0 = nullptr;
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  void* pv2 = (void*)0xABC0;  // NOLINT
-  char* const p1 = reinterpret_cast<char*>(pv1);
-  char* const p2 = reinterpret_cast<char*>(pv2);
-  ASSERT_EQ(p1, p1);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p0, p2),
-                          "  p2\n    Which is:");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p1, p2),
-                          "  p2\n    Which is:");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(reinterpret_cast<char*>(0x1234),
-                                 reinterpret_cast<char*>(0xABC0)),
-                       "ABC0");
-}
-
-// Tests using wchar_t pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, WideCharPointer) {
-  wchar_t* const p0 = nullptr;
-  // Only way to get the Nokia compiler to compile the cast
-  // is to have a separate void* variable first. Putting
-  // the two casts on the same line doesn't work, neither does
-  // a direct C-style to char*.
-  void* pv1 = (void*)0x1234;  // NOLINT
-  void* pv2 = (void*)0xABC0;  // NOLINT
-  wchar_t* const p1 = reinterpret_cast<wchar_t*>(pv1);
-  wchar_t* const p2 = reinterpret_cast<wchar_t*>(pv2);
-  EXPECT_EQ(p0, p0);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p0, p2),
-                          "  p2\n    Which is:");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p1, p2),
-                          "  p2\n    Which is:");
-  void* pv3 = (void*)0x1234;  // NOLINT
-  void* pv4 = (void*)0xABC0;  // NOLINT
-  const wchar_t* p3 = reinterpret_cast<const wchar_t*>(pv3);
-  const wchar_t* p4 = reinterpret_cast<const wchar_t*>(pv4);
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(p3, p4),
-                          "p4");
-}
-
-// Tests using other types of pointers in {EXPECT|ASSERT}_EQ.
-TEST(EqAssertionTest, OtherPointer) {
-  ASSERT_EQ(static_cast<const int*>(nullptr), static_cast<const int*>(nullptr));
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(static_cast<const int*>(nullptr),
-                                 reinterpret_cast<const int*>(0x1234)),
-                       "0x1234");
-}
-
-// A class that supports binary comparison operators but not streaming.
-class UnprintableChar {
- public:
-  explicit UnprintableChar(char ch) : char_(ch) {}
-
-  bool operator==(const UnprintableChar& rhs) const {
-    return char_ == rhs.char_;
-  }
-  bool operator!=(const UnprintableChar& rhs) const {
-    return char_ != rhs.char_;
-  }
-  bool operator<(const UnprintableChar& rhs) const {
-    return char_ < rhs.char_;
-  }
-  bool operator<=(const UnprintableChar& rhs) const {
-    return char_ <= rhs.char_;
-  }
-  bool operator>(const UnprintableChar& rhs) const {
-    return char_ > rhs.char_;
-  }
-  bool operator>=(const UnprintableChar& rhs) const {
-    return char_ >= rhs.char_;
-  }
-
- private:
-  char char_;
-};
-
-// Tests that ASSERT_EQ() and friends don't require the arguments to
-// be printable.
-TEST(ComparisonAssertionTest, AcceptsUnprintableArgs) {
-  const UnprintableChar x('x'), y('y');
-  ASSERT_EQ(x, x);
-  EXPECT_NE(x, y);
-  ASSERT_LT(x, y);
-  EXPECT_LE(x, y);
-  ASSERT_GT(y, x);
-  EXPECT_GE(x, x);
-
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y), "1-byte object <78>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(x, y), "1-byte object <79>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(y, y), "1-byte object <79>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(x, y), "1-byte object <78>");
-  EXPECT_NONFATAL_FAILURE(EXPECT_GT(x, y), "1-byte object <79>");
-
-  // Code tested by EXPECT_FATAL_FAILURE cannot reference local
-  // variables, so we have to write UnprintableChar('x') instead of x.
-#ifndef __BORLANDC__
-  // ICE's in C++Builder.
-  EXPECT_FATAL_FAILURE(ASSERT_NE(UnprintableChar('x'), UnprintableChar('x')),
-                       "1-byte object <78>");
-  EXPECT_FATAL_FAILURE(ASSERT_LE(UnprintableChar('y'), UnprintableChar('x')),
-                       "1-byte object <78>");
-#endif
-  EXPECT_FATAL_FAILURE(ASSERT_LE(UnprintableChar('y'), UnprintableChar('x')),
-                       "1-byte object <79>");
-  EXPECT_FATAL_FAILURE(ASSERT_GE(UnprintableChar('x'), UnprintableChar('y')),
-                       "1-byte object <78>");
-  EXPECT_FATAL_FAILURE(ASSERT_GE(UnprintableChar('x'), UnprintableChar('y')),
-                       "1-byte object <79>");
-}
-
-// Tests the FRIEND_TEST macro.
-
-// This class has a private member we want to test.  We will test it
-// both in a TEST and in a TEST_F.
-class Foo {
- public:
-  Foo() {}
-
- private:
-  int Bar() const { return 1; }
-
-  // Declares the friend tests that can access the private member
-  // Bar().
-  FRIEND_TEST(FRIEND_TEST_Test, TEST);
-  FRIEND_TEST(FRIEND_TEST_Test2, TEST_F);
-};
-
-// Tests that the FRIEND_TEST declaration allows a TEST to access a
-// class's private members.  This should compile.
-TEST(FRIEND_TEST_Test, TEST) {
-  ASSERT_EQ(1, Foo().Bar());
-}
-
-// The fixture needed to test using FRIEND_TEST with TEST_F.
-class FRIEND_TEST_Test2 : public Test {
- protected:
-  Foo foo;
-};
-
-// Tests that the FRIEND_TEST declaration allows a TEST_F to access a
-// class's private members.  This should compile.
-TEST_F(FRIEND_TEST_Test2, TEST_F) {
-  ASSERT_EQ(1, foo.Bar());
-}
-
-// Tests the life cycle of Test objects.
-
-// The test fixture for testing the life cycle of Test objects.
-//
-// This class counts the number of live test objects that uses this
-// fixture.
-class TestLifeCycleTest : public Test {
- protected:
-  // Constructor.  Increments the number of test objects that uses
-  // this fixture.
-  TestLifeCycleTest() { count_++; }
-
-  // Destructor.  Decrements the number of test objects that uses this
-  // fixture.
-  ~TestLifeCycleTest() override { count_--; }
-
-  // Returns the number of live test objects that uses this fixture.
-  int count() const { return count_; }
-
- private:
-  static int count_;
-};
-
-int TestLifeCycleTest::count_ = 0;
-
-// Tests the life cycle of test objects.
-TEST_F(TestLifeCycleTest, Test1) {
-  // There should be only one test object in this test case that's
-  // currently alive.
-  ASSERT_EQ(1, count());
-}
-
-// Tests the life cycle of test objects.
-TEST_F(TestLifeCycleTest, Test2) {
-  // After Test1 is done and Test2 is started, there should still be
-  // only one live test object, as the object for Test1 should've been
-  // deleted.
-  ASSERT_EQ(1, count());
-}
-
-}  // namespace
-
-// Tests that the copy constructor works when it is NOT optimized away by
-// the compiler.
-TEST(AssertionResultTest, CopyConstructorWorksWhenNotOptimied) {
-  // Checks that the copy constructor doesn't try to dereference NULL pointers
-  // in the source object.
-  AssertionResult r1 = AssertionSuccess();
-  AssertionResult r2 = r1;
-  // The following line is added to prevent the compiler from optimizing
-  // away the constructor call.
-  r1 << "abc";
-
-  AssertionResult r3 = r1;
-  EXPECT_EQ(static_cast<bool>(r3), static_cast<bool>(r1));
-  EXPECT_STREQ("abc", r1.message());
-}
-
-// Tests that AssertionSuccess and AssertionFailure construct
-// AssertionResult objects as expected.
-TEST(AssertionResultTest, ConstructionWorks) {
-  AssertionResult r1 = AssertionSuccess();
-  EXPECT_TRUE(r1);
-  EXPECT_STREQ("", r1.message());
-
-  AssertionResult r2 = AssertionSuccess() << "abc";
-  EXPECT_TRUE(r2);
-  EXPECT_STREQ("abc", r2.message());
-
-  AssertionResult r3 = AssertionFailure();
-  EXPECT_FALSE(r3);
-  EXPECT_STREQ("", r3.message());
-
-  AssertionResult r4 = AssertionFailure() << "def";
-  EXPECT_FALSE(r4);
-  EXPECT_STREQ("def", r4.message());
-
-  AssertionResult r5 = AssertionFailure(Message() << "ghi");
-  EXPECT_FALSE(r5);
-  EXPECT_STREQ("ghi", r5.message());
-}
-
-// Tests that the negation flips the predicate result but keeps the message.
-TEST(AssertionResultTest, NegationWorks) {
-  AssertionResult r1 = AssertionSuccess() << "abc";
-  EXPECT_FALSE(!r1);
-  EXPECT_STREQ("abc", (!r1).message());
-
-  AssertionResult r2 = AssertionFailure() << "def";
-  EXPECT_TRUE(!r2);
-  EXPECT_STREQ("def", (!r2).message());
-}
-
-TEST(AssertionResultTest, StreamingWorks) {
-  AssertionResult r = AssertionSuccess();
-  r << "abc" << 'd' << 0 << true;
-  EXPECT_STREQ("abcd0true", r.message());
-}
-
-TEST(AssertionResultTest, CanStreamOstreamManipulators) {
-  AssertionResult r = AssertionSuccess();
-  r << "Data" << std::endl << std::flush << std::ends << "Will be visible";
-  EXPECT_STREQ("Data\n\\0Will be visible", r.message());
-}
-
-// The next test uses explicit conversion operators
-
-TEST(AssertionResultTest, ConstructibleFromContextuallyConvertibleToBool) {
-  struct ExplicitlyConvertibleToBool {
-    explicit operator bool() const { return value; }
-    bool value;
-  };
-  ExplicitlyConvertibleToBool v1 = {false};
-  ExplicitlyConvertibleToBool v2 = {true};
-  EXPECT_FALSE(v1);
-  EXPECT_TRUE(v2);
-}
-
-struct ConvertibleToAssertionResult {
-  operator AssertionResult() const { return AssertionResult(true); }
-};
-
-TEST(AssertionResultTest, ConstructibleFromImplicitlyConvertible) {
-  ConvertibleToAssertionResult obj;
-  EXPECT_TRUE(obj);
-}
-
-// Tests streaming a user type whose definition and operator << are
-// both in the global namespace.
-class Base {
- public:
-  explicit Base(int an_x) : x_(an_x) {}
-  int x() const { return x_; }
- private:
-  int x_;
-};
-std::ostream& operator<<(std::ostream& os,
-                         const Base& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const Base* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-
-TEST(MessageTest, CanStreamUserTypeInGlobalNameSpace) {
-  Message msg;
-  Base a(1);
-
-  msg << a << &a;  // Uses ::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition and operator<< are
-// both in an unnamed namespace.
-namespace {
-class MyTypeInUnnamedNameSpace : public Base {
- public:
-  explicit MyTypeInUnnamedNameSpace(int an_x): Base(an_x) {}
-};
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInUnnamedNameSpace& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInUnnamedNameSpace* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-}  // namespace
-
-TEST(MessageTest, CanStreamUserTypeInUnnamedNameSpace) {
-  Message msg;
-  MyTypeInUnnamedNameSpace a(1);
-
-  msg << a << &a;  // Uses <unnamed_namespace>::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition and operator<< are
-// both in a user namespace.
-namespace namespace1 {
-class MyTypeInNameSpace1 : public Base {
- public:
-  explicit MyTypeInNameSpace1(int an_x): Base(an_x) {}
-};
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInNameSpace1& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const MyTypeInNameSpace1* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-}  // namespace namespace1
-
-TEST(MessageTest, CanStreamUserTypeInUserNameSpace) {
-  Message msg;
-  namespace1::MyTypeInNameSpace1 a(1);
-
-  msg << a << &a;  // Uses namespace1::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming a user type whose definition is in a user namespace
-// but whose operator<< is in the global namespace.
-namespace namespace2 {
-class MyTypeInNameSpace2 : public ::Base {
- public:
-  explicit MyTypeInNameSpace2(int an_x): Base(an_x) {}
-};
-}  // namespace namespace2
-std::ostream& operator<<(std::ostream& os,
-                         const namespace2::MyTypeInNameSpace2& val) {
-  return os << val.x();
-}
-std::ostream& operator<<(std::ostream& os,
-                         const namespace2::MyTypeInNameSpace2* pointer) {
-  return os << "(" << pointer->x() << ")";
-}
-
-TEST(MessageTest, CanStreamUserTypeInUserNameSpaceWithStreamOperatorInGlobal) {
-  Message msg;
-  namespace2::MyTypeInNameSpace2 a(1);
-
-  msg << a << &a;  // Uses ::operator<<.
-  EXPECT_STREQ("1(1)", msg.GetString().c_str());
-}
-
-// Tests streaming NULL pointers to testing::Message.
-TEST(MessageTest, NullPointers) {
-  Message msg;
-  char* const p1 = nullptr;
-  unsigned char* const p2 = nullptr;
-  int* p3 = nullptr;
-  double* p4 = nullptr;
-  bool* p5 = nullptr;
-  Message* p6 = nullptr;
-
-  msg << p1 << p2 << p3 << p4 << p5 << p6;
-  ASSERT_STREQ("(null)(null)(null)(null)(null)(null)",
-               msg.GetString().c_str());
-}
-
-// Tests streaming wide strings to testing::Message.
-TEST(MessageTest, WideStrings) {
-  // Streams a NULL of type const wchar_t*.
-  const wchar_t* const_wstr = nullptr;
-  EXPECT_STREQ("(null)",
-               (Message() << const_wstr).GetString().c_str());
-
-  // Streams a NULL of type wchar_t*.
-  wchar_t* wstr = nullptr;
-  EXPECT_STREQ("(null)",
-               (Message() << wstr).GetString().c_str());
-
-  // Streams a non-NULL of type const wchar_t*.
-  const_wstr = L"abc\x8119";
-  EXPECT_STREQ("abc\xe8\x84\x99",
-               (Message() << const_wstr).GetString().c_str());
-
-  // Streams a non-NULL of type wchar_t*.
-  wstr = const_cast<wchar_t*>(const_wstr);
-  EXPECT_STREQ("abc\xe8\x84\x99",
-               (Message() << wstr).GetString().c_str());
-}
-
-
-// This line tests that we can define tests in the testing namespace.
-namespace testing {
-
-// Tests the TestInfo class.
-
-class TestInfoTest : public Test {
- protected:
-  static const TestInfo* GetTestInfo(const char* test_name) {
-    const TestSuite* const test_suite =
-        GetUnitTestImpl()->GetTestSuite("TestInfoTest", "", nullptr, nullptr);
-
-    for (int i = 0; i < test_suite->total_test_count(); ++i) {
-      const TestInfo* const test_info = test_suite->GetTestInfo(i);
-      if (strcmp(test_name, test_info->name()) == 0)
-        return test_info;
-    }
-    return nullptr;
-  }
-
-  static const TestResult* GetTestResult(
-      const TestInfo* test_info) {
-    return test_info->result();
-  }
-};
-
-// Tests TestInfo::test_case_name() and TestInfo::name().
-TEST_F(TestInfoTest, Names) {
-  const TestInfo* const test_info = GetTestInfo("Names");
-
-  ASSERT_STREQ("TestInfoTest", test_info->test_case_name());
-  ASSERT_STREQ("Names", test_info->name());
-}
-
-// Tests TestInfo::result().
-TEST_F(TestInfoTest, result) {
-  const TestInfo* const test_info = GetTestInfo("result");
-
-  // Initially, there is no TestPartResult for this test.
-  ASSERT_EQ(0, GetTestResult(test_info)->total_part_count());
-
-  // After the previous assertion, there is still none.
-  ASSERT_EQ(0, GetTestResult(test_info)->total_part_count());
-}
-
-#define VERIFY_CODE_LOCATION \
-  const int expected_line = __LINE__ - 1; \
-  const TestInfo* const test_info = GetUnitTestImpl()->current_test_info(); \
-  ASSERT_TRUE(test_info); \
-  EXPECT_STREQ(__FILE__, test_info->file()); \
-  EXPECT_EQ(expected_line, test_info->line())
-
-TEST(CodeLocationForTEST, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-class CodeLocationForTESTF : public Test {
-};
-
-TEST_F(CodeLocationForTESTF, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-class CodeLocationForTESTP : public TestWithParam<int> {
-};
-
-TEST_P(CodeLocationForTESTP, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-INSTANTIATE_TEST_SUITE_P(, CodeLocationForTESTP, Values(0));
-
-template <typename T>
-class CodeLocationForTYPEDTEST : public Test {
-};
-
-TYPED_TEST_SUITE(CodeLocationForTYPEDTEST, int);
-
-TYPED_TEST(CodeLocationForTYPEDTEST, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-template <typename T>
-class CodeLocationForTYPEDTESTP : public Test {
-};
-
-TYPED_TEST_SUITE_P(CodeLocationForTYPEDTESTP);
-
-TYPED_TEST_P(CodeLocationForTYPEDTESTP, Verify) {
-  VERIFY_CODE_LOCATION;
-}
-
-REGISTER_TYPED_TEST_SUITE_P(CodeLocationForTYPEDTESTP, Verify);
-
-INSTANTIATE_TYPED_TEST_SUITE_P(My, CodeLocationForTYPEDTESTP, int);
-
-#undef VERIFY_CODE_LOCATION
-
-// Tests setting up and tearing down a test case.
-// Legacy API is deprecated but still available
-#ifndef REMOVE_LEGACY_TEST_CASEAPI
-class SetUpTestCaseTest : public Test {
- protected:
-  // This will be called once before the first test in this test case
-  // is run.
-  static void SetUpTestCase() {
-    printf("Setting up the test case . . .\n");
-
-    // Initializes some shared resource.  In this simple example, we
-    // just create a C string.  More complex stuff can be done if
-    // desired.
-    shared_resource_ = "123";
-
-    // Increments the number of test cases that have been set up.
-    counter_++;
-
-    // SetUpTestCase() should be called only once.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // This will be called once after the last test in this test case is
-  // run.
-  static void TearDownTestCase() {
-    printf("Tearing down the test case . . .\n");
-
-    // Decrements the number of test cases that have been set up.
-    counter_--;
-
-    // TearDownTestCase() should be called only once.
-    EXPECT_EQ(0, counter_);
-
-    // Cleans up the shared resource.
-    shared_resource_ = nullptr;
-  }
-
-  // This will be called before each test in this test case.
-  void SetUp() override {
-    // SetUpTestCase() should be called only once, so counter_ should
-    // always be 1.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // Number of test cases that have been set up.
-  static int counter_;
-
-  // Some resource to be shared by all tests in this test case.
-  static const char* shared_resource_;
-};
-
-int SetUpTestCaseTest::counter_ = 0;
-const char* SetUpTestCaseTest::shared_resource_ = nullptr;
-
-// A test that uses the shared resource.
-TEST_F(SetUpTestCaseTest, Test1) { EXPECT_STRNE(nullptr, shared_resource_); }
-
-// Another test that uses the shared resource.
-TEST_F(SetUpTestCaseTest, Test2) {
-  EXPECT_STREQ("123", shared_resource_);
-}
-#endif  //  REMOVE_LEGACY_TEST_CASEAPI
-
-// Tests SetupTestSuite/TearDown TestSuite
-class SetUpTestSuiteTest : public Test {
- protected:
-  // This will be called once before the first test in this test case
-  // is run.
-  static void SetUpTestSuite() {
-    printf("Setting up the test suite . . .\n");
-
-    // Initializes some shared resource.  In this simple example, we
-    // just create a C string.  More complex stuff can be done if
-    // desired.
-    shared_resource_ = "123";
-
-    // Increments the number of test cases that have been set up.
-    counter_++;
-
-    // SetUpTestSuite() should be called only once.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // This will be called once after the last test in this test case is
-  // run.
-  static void TearDownTestSuite() {
-    printf("Tearing down the test suite . . .\n");
-
-    // Decrements the number of test suites that have been set up.
-    counter_--;
-
-    // TearDownTestSuite() should be called only once.
-    EXPECT_EQ(0, counter_);
-
-    // Cleans up the shared resource.
-    shared_resource_ = nullptr;
-  }
-
-  // This will be called before each test in this test case.
-  void SetUp() override {
-    // SetUpTestSuite() should be called only once, so counter_ should
-    // always be 1.
-    EXPECT_EQ(1, counter_);
-  }
-
-  // Number of test suites that have been set up.
-  static int counter_;
-
-  // Some resource to be shared by all tests in this test case.
-  static const char* shared_resource_;
-};
-
-int SetUpTestSuiteTest::counter_ = 0;
-const char* SetUpTestSuiteTest::shared_resource_ = nullptr;
-
-// A test that uses the shared resource.
-TEST_F(SetUpTestSuiteTest, TestSetupTestSuite1) {
-  EXPECT_STRNE(nullptr, shared_resource_);
-}
-
-// Another test that uses the shared resource.
-TEST_F(SetUpTestSuiteTest, TestSetupTestSuite2) {
-  EXPECT_STREQ("123", shared_resource_);
-}
-
-// The ParseFlagsTest test case tests ParseGoogleTestFlagsOnly.
-
-// The Flags struct stores a copy of all Google Test flags.
-struct Flags {
-  // Constructs a Flags struct where each flag has its default value.
-  Flags() : also_run_disabled_tests(false),
-            break_on_failure(false),
-            catch_exceptions(false),
-            death_test_use_fork(false),
-            filter(""),
-            list_tests(false),
-            output(""),
-            print_time(true),
-            random_seed(0),
-            repeat(1),
-            shuffle(false),
-            stack_trace_depth(kMaxStackTraceDepth),
-            stream_result_to(""),
-            throw_on_failure(false) {}
-
-  // Factory methods.
-
-  // Creates a Flags struct where the gtest_also_run_disabled_tests flag has
-  // the given value.
-  static Flags AlsoRunDisabledTests(bool also_run_disabled_tests) {
-    Flags flags;
-    flags.also_run_disabled_tests = also_run_disabled_tests;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_break_on_failure flag has
-  // the given value.
-  static Flags BreakOnFailure(bool break_on_failure) {
-    Flags flags;
-    flags.break_on_failure = break_on_failure;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_catch_exceptions flag has
-  // the given value.
-  static Flags CatchExceptions(bool catch_exceptions) {
-    Flags flags;
-    flags.catch_exceptions = catch_exceptions;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_death_test_use_fork flag has
-  // the given value.
-  static Flags DeathTestUseFork(bool death_test_use_fork) {
-    Flags flags;
-    flags.death_test_use_fork = death_test_use_fork;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_filter flag has the given
-  // value.
-  static Flags Filter(const char* filter) {
-    Flags flags;
-    flags.filter = filter;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_list_tests flag has the
-  // given value.
-  static Flags ListTests(bool list_tests) {
-    Flags flags;
-    flags.list_tests = list_tests;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_output flag has the given
-  // value.
-  static Flags Output(const char* output) {
-    Flags flags;
-    flags.output = output;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_print_time flag has the given
-  // value.
-  static Flags PrintTime(bool print_time) {
-    Flags flags;
-    flags.print_time = print_time;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_random_seed flag has the given
-  // value.
-  static Flags RandomSeed(Int32 random_seed) {
-    Flags flags;
-    flags.random_seed = random_seed;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_repeat flag has the given
-  // value.
-  static Flags Repeat(Int32 repeat) {
-    Flags flags;
-    flags.repeat = repeat;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_shuffle flag has the given
-  // value.
-  static Flags Shuffle(bool shuffle) {
-    Flags flags;
-    flags.shuffle = shuffle;
-    return flags;
-  }
-
-  // Creates a Flags struct where the GTEST_FLAG(stack_trace_depth) flag has
-  // the given value.
-  static Flags StackTraceDepth(Int32 stack_trace_depth) {
-    Flags flags;
-    flags.stack_trace_depth = stack_trace_depth;
-    return flags;
-  }
-
-  // Creates a Flags struct where the GTEST_FLAG(stream_result_to) flag has
-  // the given value.
-  static Flags StreamResultTo(const char* stream_result_to) {
-    Flags flags;
-    flags.stream_result_to = stream_result_to;
-    return flags;
-  }
-
-  // Creates a Flags struct where the gtest_throw_on_failure flag has
-  // the given value.
-  static Flags ThrowOnFailure(bool throw_on_failure) {
-    Flags flags;
-    flags.throw_on_failure = throw_on_failure;
-    return flags;
-  }
-
-  // These fields store the flag values.
-  bool also_run_disabled_tests;
-  bool break_on_failure;
-  bool catch_exceptions;
-  bool death_test_use_fork;
-  const char* filter;
-  bool list_tests;
-  const char* output;
-  bool print_time;
-  Int32 random_seed;
-  Int32 repeat;
-  bool shuffle;
-  Int32 stack_trace_depth;
-  const char* stream_result_to;
-  bool throw_on_failure;
-};
-
-// Fixture for testing ParseGoogleTestFlagsOnly().
-class ParseFlagsTest : public Test {
- protected:
-  // Clears the flags before each test.
-  void SetUp() override {
-    GTEST_FLAG(also_run_disabled_tests) = false;
-    GTEST_FLAG(break_on_failure) = false;
-    GTEST_FLAG(catch_exceptions) = false;
-    GTEST_FLAG(death_test_use_fork) = false;
-    GTEST_FLAG(filter) = "";
-    GTEST_FLAG(list_tests) = false;
-    GTEST_FLAG(output) = "";
-    GTEST_FLAG(print_time) = true;
-    GTEST_FLAG(random_seed) = 0;
-    GTEST_FLAG(repeat) = 1;
-    GTEST_FLAG(shuffle) = false;
-    GTEST_FLAG(stack_trace_depth) = kMaxStackTraceDepth;
-    GTEST_FLAG(stream_result_to) = "";
-    GTEST_FLAG(throw_on_failure) = false;
-  }
-
-  // Asserts that two narrow or wide string arrays are equal.
-  template <typename CharType>
-  static void AssertStringArrayEq(int size1, CharType** array1, int size2,
-                                  CharType** array2) {
-    ASSERT_EQ(size1, size2) << " Array sizes different.";
-
-    for (int i = 0; i != size1; i++) {
-      ASSERT_STREQ(array1[i], array2[i]) << " where i == " << i;
-    }
-  }
-
-  // Verifies that the flag values match the expected values.
-  static void CheckFlags(const Flags& expected) {
-    EXPECT_EQ(expected.also_run_disabled_tests,
-              GTEST_FLAG(also_run_disabled_tests));
-    EXPECT_EQ(expected.break_on_failure, GTEST_FLAG(break_on_failure));
-    EXPECT_EQ(expected.catch_exceptions, GTEST_FLAG(catch_exceptions));
-    EXPECT_EQ(expected.death_test_use_fork, GTEST_FLAG(death_test_use_fork));
-    EXPECT_STREQ(expected.filter, GTEST_FLAG(filter).c_str());
-    EXPECT_EQ(expected.list_tests, GTEST_FLAG(list_tests));
-    EXPECT_STREQ(expected.output, GTEST_FLAG(output).c_str());
-    EXPECT_EQ(expected.print_time, GTEST_FLAG(print_time));
-    EXPECT_EQ(expected.random_seed, GTEST_FLAG(random_seed));
-    EXPECT_EQ(expected.repeat, GTEST_FLAG(repeat));
-    EXPECT_EQ(expected.shuffle, GTEST_FLAG(shuffle));
-    EXPECT_EQ(expected.stack_trace_depth, GTEST_FLAG(stack_trace_depth));
-    EXPECT_STREQ(expected.stream_result_to,
-                 GTEST_FLAG(stream_result_to).c_str());
-    EXPECT_EQ(expected.throw_on_failure, GTEST_FLAG(throw_on_failure));
-  }
-
-  // Parses a command line (specified by argc1 and argv1), then
-  // verifies that the flag values are expected and that the
-  // recognized flags are removed from the command line.
-  template <typename CharType>
-  static void TestParsingFlags(int argc1, const CharType** argv1,
-                               int argc2, const CharType** argv2,
-                               const Flags& expected, bool should_print_help) {
-    const bool saved_help_flag = ::testing::internal::g_help_flag;
-    ::testing::internal::g_help_flag = false;
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    CaptureStdout();
-# endif
-
-    // Parses the command line.
-    internal::ParseGoogleTestFlagsOnly(&argc1, const_cast<CharType**>(argv1));
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    const std::string captured_stdout = GetCapturedStdout();
-# endif
-
-    // Verifies the flag values.
-    CheckFlags(expected);
-
-    // Verifies that the recognized flags are removed from the command
-    // line.
-    AssertStringArrayEq(argc1 + 1, argv1, argc2 + 1, argv2);
-
-    // ParseGoogleTestFlagsOnly should neither set g_help_flag nor print the
-    // help message for the flags it recognizes.
-    EXPECT_EQ(should_print_help, ::testing::internal::g_help_flag);
-
-# if GTEST_HAS_STREAM_REDIRECTION
-    const char* const expected_help_fragment =
-        "This program contains tests written using";
-    if (should_print_help) {
-      EXPECT_PRED_FORMAT2(IsSubstring, expected_help_fragment, captured_stdout);
-    } else {
-      EXPECT_PRED_FORMAT2(IsNotSubstring,
-                          expected_help_fragment, captured_stdout);
-    }
-# endif  // GTEST_HAS_STREAM_REDIRECTION
-
-    ::testing::internal::g_help_flag = saved_help_flag;
-  }
-
-  // This macro wraps TestParsingFlags s.t. the user doesn't need
-  // to specify the array sizes.
-
-# define GTEST_TEST_PARSING_FLAGS_(argv1, argv2, expected, should_print_help) \
-  TestParsingFlags(sizeof(argv1)/sizeof(*argv1) - 1, argv1, \
-                   sizeof(argv2)/sizeof(*argv2) - 1, argv2, \
-                   expected, should_print_help)
-};
-
-// Tests parsing an empty command line.
-TEST_F(ParseFlagsTest, Empty) {
-  const char* argv[] = {nullptr};
-
-  const char* argv2[] = {nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests parsing a command line that has no flag.
-TEST_F(ParseFlagsTest, NoFlag) {
-  const char* argv[] = {"foo.exe", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests parsing a bad --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterBad) {
-  const char* argv[] = {"foo.exe", "--gtest_filter", nullptr};
-
-  const char* argv2[] = {"foo.exe", "--gtest_filter", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter(""), true);
-}
-
-// Tests parsing an empty --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter(""), false);
-}
-
-// Tests parsing a non-empty --gtest_filter flag.
-TEST_F(ParseFlagsTest, FilterNonEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=abc", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("abc"), false);
-}
-
-// Tests parsing --gtest_break_on_failure.
-TEST_F(ParseFlagsTest, BreakOnFailureWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(true), false);
-}
-
-// Tests parsing --gtest_break_on_failure=0.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing --gtest_break_on_failure=f.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing --gtest_break_on_failure=F.
-TEST_F(ParseFlagsTest, BreakOnFailureFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(false), false);
-}
-
-// Tests parsing a --gtest_break_on_failure flag that has a "true"
-// definition.
-TEST_F(ParseFlagsTest, BreakOnFailureTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::BreakOnFailure(true), false);
-}
-
-// Tests parsing --gtest_catch_exceptions.
-TEST_F(ParseFlagsTest, CatchExceptions) {
-  const char* argv[] = {"foo.exe", "--gtest_catch_exceptions", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::CatchExceptions(true), false);
-}
-
-// Tests parsing --gtest_death_test_use_fork.
-TEST_F(ParseFlagsTest, DeathTestUseFork) {
-  const char* argv[] = {"foo.exe", "--gtest_death_test_use_fork", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::DeathTestUseFork(true), false);
-}
-
-// Tests having the same flag twice with different values.  The
-// expected behavior is that the one coming last takes precedence.
-TEST_F(ParseFlagsTest, DuplicatedFlags) {
-  const char* argv[] = {"foo.exe", "--gtest_filter=a", "--gtest_filter=b",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("b"), false);
-}
-
-// Tests having an unrecognized flag on the command line.
-TEST_F(ParseFlagsTest, UnrecognizedFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_break_on_failure",
-                        "bar",  // Unrecognized by Google Test.
-                        "--gtest_filter=b", nullptr};
-
-  const char* argv2[] = {"foo.exe", "bar", nullptr};
-
-  Flags flags;
-  flags.break_on_failure = true;
-  flags.filter = "b";
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, flags, false);
-}
-
-// Tests having a --gtest_list_tests flag
-TEST_F(ParseFlagsTest, ListTestsFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(true), false);
-}
-
-// Tests having a --gtest_list_tests flag with a "true" value
-TEST_F(ParseFlagsTest, ListTestsTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(true), false);
-}
-
-// Tests having a --gtest_list_tests flag with a "false" value
-TEST_F(ParseFlagsTest, ListTestsFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_list_tests=f.
-TEST_F(ParseFlagsTest, ListTestsFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_list_tests=F.
-TEST_F(ParseFlagsTest, ListTestsFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_list_tests=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ListTests(false), false);
-}
-
-// Tests parsing --gtest_output (invalid).
-TEST_F(ParseFlagsTest, OutputEmpty) {
-  const char* argv[] = {"foo.exe", "--gtest_output", nullptr};
-
-  const char* argv2[] = {"foo.exe", "--gtest_output", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), true);
-}
-
-// Tests parsing --gtest_output=xml
-TEST_F(ParseFlagsTest, OutputXml) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Output("xml"), false);
-}
-
-// Tests parsing --gtest_output=xml:file
-TEST_F(ParseFlagsTest, OutputXmlFile) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml:file", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Output("xml:file"), false);
-}
-
-// Tests parsing --gtest_output=xml:directory/path/
-TEST_F(ParseFlagsTest, OutputXmlDirectory) {
-  const char* argv[] = {"foo.exe", "--gtest_output=xml:directory/path/",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2,
-                            Flags::Output("xml:directory/path/"), false);
-}
-
-// Tests having a --gtest_print_time flag
-TEST_F(ParseFlagsTest, PrintTimeFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(true), false);
-}
-
-// Tests having a --gtest_print_time flag with a "true" value
-TEST_F(ParseFlagsTest, PrintTimeTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(true), false);
-}
-
-// Tests having a --gtest_print_time flag with a "false" value
-TEST_F(ParseFlagsTest, PrintTimeFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_print_time=f.
-TEST_F(ParseFlagsTest, PrintTimeFalse_f) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=f", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_print_time=F.
-TEST_F(ParseFlagsTest, PrintTimeFalse_F) {
-  const char* argv[] = {"foo.exe", "--gtest_print_time=F", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::PrintTime(false), false);
-}
-
-// Tests parsing --gtest_random_seed=number
-TEST_F(ParseFlagsTest, RandomSeed) {
-  const char* argv[] = {"foo.exe", "--gtest_random_seed=1000", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::RandomSeed(1000), false);
-}
-
-// Tests parsing --gtest_repeat=number
-TEST_F(ParseFlagsTest, Repeat) {
-  const char* argv[] = {"foo.exe", "--gtest_repeat=1000", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Repeat(1000), false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsFlag) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(true),
-                            false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag with a "true" value
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests=1",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(true),
-                            false);
-}
-
-// Tests having a --gtest_also_run_disabled_tests flag with a "false" value
-TEST_F(ParseFlagsTest, AlsoRunDisabledTestsFalse) {
-  const char* argv[] = {"foo.exe", "--gtest_also_run_disabled_tests=0",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::AlsoRunDisabledTests(false),
-                            false);
-}
-
-// Tests parsing --gtest_shuffle.
-TEST_F(ParseFlagsTest, ShuffleWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(true), false);
-}
-
-// Tests parsing --gtest_shuffle=0.
-TEST_F(ParseFlagsTest, ShuffleFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(false), false);
-}
-
-// Tests parsing a --gtest_shuffle flag that has a "true" definition.
-TEST_F(ParseFlagsTest, ShuffleTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_shuffle=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Shuffle(true), false);
-}
-
-// Tests parsing --gtest_stack_trace_depth=number.
-TEST_F(ParseFlagsTest, StackTraceDepth) {
-  const char* argv[] = {"foo.exe", "--gtest_stack_trace_depth=5", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::StackTraceDepth(5), false);
-}
-
-TEST_F(ParseFlagsTest, StreamResultTo) {
-  const char* argv[] = {"foo.exe", "--gtest_stream_result_to=localhost:1234",
-                        nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(
-      argv, argv2, Flags::StreamResultTo("localhost:1234"), false);
-}
-
-// Tests parsing --gtest_throw_on_failure.
-TEST_F(ParseFlagsTest, ThrowOnFailureWithoutValue) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(true), false);
-}
-
-// Tests parsing --gtest_throw_on_failure=0.
-TEST_F(ParseFlagsTest, ThrowOnFailureFalse_0) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure=0", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(false), false);
-}
-
-// Tests parsing a --gtest_throw_on_failure flag that has a "true"
-// definition.
-TEST_F(ParseFlagsTest, ThrowOnFailureTrue) {
-  const char* argv[] = {"foo.exe", "--gtest_throw_on_failure=1", nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::ThrowOnFailure(true), false);
-}
-
-# if GTEST_OS_WINDOWS
-// Tests parsing wide strings.
-TEST_F(ParseFlagsTest, WideStrings) {
-  const wchar_t* argv[] = {
-    L"foo.exe",
-    L"--gtest_filter=Foo*",
-    L"--gtest_list_tests=1",
-    L"--gtest_break_on_failure",
-    L"--non_gtest_flag",
-    NULL
-  };
-
-  const wchar_t* argv2[] = {
-    L"foo.exe",
-    L"--non_gtest_flag",
-    NULL
-  };
-
-  Flags expected_flags;
-  expected_flags.break_on_failure = true;
-  expected_flags.filter = "Foo*";
-  expected_flags.list_tests = true;
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, expected_flags, false);
-}
-# endif  // GTEST_OS_WINDOWS
-
-#if GTEST_USE_OWN_FLAGFILE_FLAG_
-class FlagfileTest : public ParseFlagsTest {
- public:
-  virtual void SetUp() {
-    ParseFlagsTest::SetUp();
-
-    testdata_path_.Set(internal::FilePath(
-        testing::TempDir() + internal::GetCurrentExecutableName().string() +
-        "_flagfile_test"));
-    testing::internal::posix::RmDir(testdata_path_.c_str());
-    EXPECT_TRUE(testdata_path_.CreateFolder());
-  }
-
-  virtual void TearDown() {
-    testing::internal::posix::RmDir(testdata_path_.c_str());
-    ParseFlagsTest::TearDown();
-  }
-
-  internal::FilePath CreateFlagfile(const char* contents) {
-    internal::FilePath file_path(internal::FilePath::GenerateUniqueFileName(
-        testdata_path_, internal::FilePath("unique"), "txt"));
-    FILE* f = testing::internal::posix::FOpen(file_path.c_str(), "w");
-    fprintf(f, "%s", contents);
-    fclose(f);
-    return file_path;
-  }
-
- private:
-  internal::FilePath testdata_path_;
-};
-
-// Tests an empty flagfile.
-TEST_F(FlagfileTest, Empty) {
-  internal::FilePath flagfile_path(CreateFlagfile(""));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags(), false);
-}
-
-// Tests passing a non-empty --gtest_filter flag via --gtest_flagfile.
-TEST_F(FlagfileTest, FilterNonEmpty) {
-  internal::FilePath flagfile_path(CreateFlagfile(
-      "--"  GTEST_FLAG_PREFIX_  "filter=abc"));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, Flags::Filter("abc"), false);
-}
-
-// Tests passing several flags via --gtest_flagfile.
-TEST_F(FlagfileTest, SeveralFlags) {
-  internal::FilePath flagfile_path(CreateFlagfile(
-      "--"  GTEST_FLAG_PREFIX_  "filter=abc\n"
-      "--"  GTEST_FLAG_PREFIX_  "break_on_failure\n"
-      "--"  GTEST_FLAG_PREFIX_  "list_tests"));
-  std::string flagfile_flag =
-      std::string("--" GTEST_FLAG_PREFIX_ "flagfile=") + flagfile_path.c_str();
-
-  const char* argv[] = {"foo.exe", flagfile_flag.c_str(), nullptr};
-
-  const char* argv2[] = {"foo.exe", nullptr};
-
-  Flags expected_flags;
-  expected_flags.break_on_failure = true;
-  expected_flags.filter = "abc";
-  expected_flags.list_tests = true;
-
-  GTEST_TEST_PARSING_FLAGS_(argv, argv2, expected_flags, false);
-}
-#endif  // GTEST_USE_OWN_FLAGFILE_FLAG_
-
-// Tests current_test_info() in UnitTest.
-class CurrentTestInfoTest : public Test {
- protected:
-  // Tests that current_test_info() returns NULL before the first test in
-  // the test case is run.
-  static void SetUpTestSuite() {
-    // There should be no tests running at this point.
-    const TestInfo* test_info =
-      UnitTest::GetInstance()->current_test_info();
-    EXPECT_TRUE(test_info == nullptr)
-        << "There should be no tests running at this point.";
-  }
-
-  // Tests that current_test_info() returns NULL after the last test in
-  // the test case has run.
-  static void TearDownTestSuite() {
-    const TestInfo* test_info =
-      UnitTest::GetInstance()->current_test_info();
-    EXPECT_TRUE(test_info == nullptr)
-        << "There should be no tests running at this point.";
-  }
-};
-
-// Tests that current_test_info() returns TestInfo for currently running
-// test by checking the expected test name against the actual one.
-TEST_F(CurrentTestInfoTest, WorksForFirstTestInATestSuite) {
-  const TestInfo* test_info =
-    UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(nullptr != test_info)
-      << "There is a test running so we should have a valid TestInfo.";
-  EXPECT_STREQ("CurrentTestInfoTest", test_info->test_case_name())
-      << "Expected the name of the currently running test case.";
-  EXPECT_STREQ("WorksForFirstTestInATestSuite", test_info->name())
-      << "Expected the name of the currently running test.";
-}
-
-// Tests that current_test_info() returns TestInfo for currently running
-// test by checking the expected test name against the actual one.  We
-// use this test to see that the TestInfo object actually changed from
-// the previous invocation.
-TEST_F(CurrentTestInfoTest, WorksForSecondTestInATestSuite) {
-  const TestInfo* test_info =
-    UnitTest::GetInstance()->current_test_info();
-  ASSERT_TRUE(nullptr != test_info)
-      << "There is a test running so we should have a valid TestInfo.";
-  EXPECT_STREQ("CurrentTestInfoTest", test_info->test_case_name())
-      << "Expected the name of the currently running test case.";
-  EXPECT_STREQ("WorksForSecondTestInATestSuite", test_info->name())
-      << "Expected the name of the currently running test.";
-}
-
-}  // namespace testing
-
-
-// These two lines test that we can define tests in a namespace that
-// has the name "testing" and is nested in another namespace.
-namespace my_namespace {
-namespace testing {
-
-// Makes sure that TEST knows to use ::testing::Test instead of
-// ::my_namespace::testing::Test.
-class Test {};
-
-// Makes sure that an assertion knows to use ::testing::Message instead of
-// ::my_namespace::testing::Message.
-class Message {};
-
-// Makes sure that an assertion knows to use
-// ::testing::AssertionResult instead of
-// ::my_namespace::testing::AssertionResult.
-class AssertionResult {};
-
-// Tests that an assertion that should succeed works as expected.
-TEST(NestedTestingNamespaceTest, Success) {
-  EXPECT_EQ(1, 1) << "This shouldn't fail.";
-}
-
-// Tests that an assertion that should fail works as expected.
-TEST(NestedTestingNamespaceTest, Failure) {
-  EXPECT_FATAL_FAILURE(FAIL() << "This failure is expected.",
-                       "This failure is expected.");
-}
-
-}  // namespace testing
-}  // namespace my_namespace
-
-// Tests that one can call superclass SetUp and TearDown methods--
-// that is, that they are not private.
-// No tests are based on this fixture; the test "passes" if it compiles
-// successfully.
-class ProtectedFixtureMethodsTest : public Test {
- protected:
-  void SetUp() override { Test::SetUp(); }
-  void TearDown() override { Test::TearDown(); }
-};
-
-// StreamingAssertionsTest tests the streaming versions of a representative
-// sample of assertions.
-TEST(StreamingAssertionsTest, Unconditional) {
-  SUCCEED() << "expected success";
-  EXPECT_NONFATAL_FAILURE(ADD_FAILURE() << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(FAIL() << "expected failure",
-                       "expected failure");
-}
-
-#ifdef __BORLANDC__
-// Silences warnings: "Condition is always true", "Unreachable code"
-# pragma option push -w-ccc -w-rch
-#endif
-
-TEST(StreamingAssertionsTest, Truth) {
-  EXPECT_TRUE(true) << "unexpected failure";
-  ASSERT_TRUE(true) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_TRUE(false) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_TRUE(false) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, Truth2) {
-  EXPECT_FALSE(false) << "unexpected failure";
-  ASSERT_FALSE(false) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FALSE(true) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_FALSE(true) << "expected failure",
-                       "expected failure");
-}
-
-#ifdef __BORLANDC__
-// Restores warnings after previous "#pragma option push" suppressed them
-# pragma option pop
-#endif
-
-TEST(StreamingAssertionsTest, IntegerEquals) {
-  EXPECT_EQ(1, 1) << "unexpected failure";
-  ASSERT_EQ(1, 1) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_EQ(1, 2) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_EQ(1, 2) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, IntegerLessThan) {
-  EXPECT_LT(1, 2) << "unexpected failure";
-  ASSERT_LT(1, 2) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_LT(2, 1) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_LT(2, 1) << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsEqual) {
-  EXPECT_STREQ("foo", "foo") << "unexpected failure";
-  ASSERT_STREQ("foo", "foo") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STREQ("foo", "bar") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STREQ("foo", "bar") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsNotEqual) {
-  EXPECT_STRNE("foo", "bar") << "unexpected failure";
-  ASSERT_STRNE("foo", "bar") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRNE("foo", "foo") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRNE("foo", "foo") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringsEqualIgnoringCase) {
-  EXPECT_STRCASEEQ("foo", "FOO") << "unexpected failure";
-  ASSERT_STRCASEEQ("foo", "FOO") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASEEQ("foo", "bar") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASEEQ("foo", "bar") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, StringNotEqualIgnoringCase) {
-  EXPECT_STRCASENE("foo", "bar") << "unexpected failure";
-  ASSERT_STRCASENE("foo", "bar") << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_STRCASENE("foo", "FOO") << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_STRCASENE("bar", "BAR") << "expected failure",
-                       "expected failure");
-}
-
-TEST(StreamingAssertionsTest, FloatingPointEquals) {
-  EXPECT_FLOAT_EQ(1.0, 1.0) << "unexpected failure";
-  ASSERT_FLOAT_EQ(1.0, 1.0) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_FLOAT_EQ(0.0, 1.0) << "expected failure",
-                          "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_FLOAT_EQ(0.0, 1.0) << "expected failure",
-                       "expected failure");
-}
-
-#if GTEST_HAS_EXCEPTIONS
-
-TEST(StreamingAssertionsTest, Throw) {
-  EXPECT_THROW(ThrowAnInteger(), int) << "unexpected failure";
-  ASSERT_THROW(ThrowAnInteger(), int) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_THROW(ThrowAnInteger(), bool) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_THROW(ThrowAnInteger(), bool) <<
-                       "expected failure", "expected failure");
-}
-
-TEST(StreamingAssertionsTest, NoThrow) {
-  EXPECT_NO_THROW(ThrowNothing()) << "unexpected failure";
-  ASSERT_NO_THROW(ThrowNothing()) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_NO_THROW(ThrowAnInteger()) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_NO_THROW(ThrowAnInteger()) <<
-                       "expected failure", "expected failure");
-}
-
-TEST(StreamingAssertionsTest, AnyThrow) {
-  EXPECT_ANY_THROW(ThrowAnInteger()) << "unexpected failure";
-  ASSERT_ANY_THROW(ThrowAnInteger()) << "unexpected failure";
-  EXPECT_NONFATAL_FAILURE(EXPECT_ANY_THROW(ThrowNothing()) <<
-                          "expected failure", "expected failure");
-  EXPECT_FATAL_FAILURE(ASSERT_ANY_THROW(ThrowNothing()) <<
-                       "expected failure", "expected failure");
-}
-
-#endif  // GTEST_HAS_EXCEPTIONS
-
-// Tests that Google Test correctly decides whether to use colors in the output.
-
-TEST(ColoredOutputTest, UsesColorsWhenGTestColorFlagIsYes) {
-  GTEST_FLAG(color) = "yes";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenGTestColorFlagIsAliasOfYes) {
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-
-  GTEST_FLAG(color) = "True";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  GTEST_FLAG(color) = "t";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  GTEST_FLAG(color) = "1";
-  EXPECT_TRUE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesNoColorWhenGTestColorFlagIsNo) {
-  GTEST_FLAG(color) = "no";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-}
-
-TEST(ColoredOutputTest, UsesNoColorWhenGTestColorFlagIsInvalid) {
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-
-  GTEST_FLAG(color) = "F";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  GTEST_FLAG(color) = "0";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  GTEST_FLAG(color) = "unknown";
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenStdoutIsTty) {
-  GTEST_FLAG(color) = "auto";
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_FALSE(ShouldUseColor(false));  // Stdout is not a TTY.
-  EXPECT_TRUE(ShouldUseColor(true));    // Stdout is a TTY.
-}
-
-TEST(ColoredOutputTest, UsesColorsWhenTermSupportsColors) {
-  GTEST_FLAG(color) = "auto";
-
-#if GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_MINGW
-  // On Windows, we ignore the TERM variable as it's usually not set.
-
-  SetEnv("TERM", "dumb");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm");
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-#else
-  // On non-Windows platforms, we rely on TERM to determine if the
-  // terminal supports colors.
-
-  SetEnv("TERM", "dumb");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "emacs");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "vt100");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-mono");  // TERM doesn't support colors.
-  EXPECT_FALSE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "xterm-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "screen");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "screen-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "tmux");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "tmux-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "rxvt-unicode");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "rxvt-unicode-256color");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "linux");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-
-  SetEnv("TERM", "cygwin");  // TERM supports colors.
-  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
-#endif  // GTEST_OS_WINDOWS
-}
-
-// Verifies that StaticAssertTypeEq works in a namespace scope.
-
-static bool dummy1 GTEST_ATTRIBUTE_UNUSED_ = StaticAssertTypeEq<bool, bool>();
-static bool dummy2 GTEST_ATTRIBUTE_UNUSED_ =
-    StaticAssertTypeEq<const int, const int>();
-
-// Verifies that StaticAssertTypeEq works in a class.
-
-template <typename T>
-class StaticAssertTypeEqTestHelper {
- public:
-  StaticAssertTypeEqTestHelper() { StaticAssertTypeEq<bool, T>(); }
-};
-
-TEST(StaticAssertTypeEqTest, WorksInClass) {
-  StaticAssertTypeEqTestHelper<bool>();
-}
-
-// Verifies that StaticAssertTypeEq works inside a function.
-
-typedef int IntAlias;
-
-TEST(StaticAssertTypeEqTest, CompilesForEqualTypes) {
-  StaticAssertTypeEq<int, IntAlias>();
-  StaticAssertTypeEq<int*, IntAlias*>();
-}
-
-TEST(HasNonfatalFailureTest, ReturnsFalseWhenThereIsNoFailure) {
-  EXPECT_FALSE(HasNonfatalFailure());
-}
-
-static void FailFatally() { FAIL(); }
-
-TEST(HasNonfatalFailureTest, ReturnsFalseWhenThereIsOnlyFatalFailure) {
-  FailFatally();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_FALSE(has_nonfatal_failure);
-}
-
-TEST(HasNonfatalFailureTest, ReturnsTrueWhenThereIsNonfatalFailure) {
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-TEST(HasNonfatalFailureTest, ReturnsTrueWhenThereAreFatalAndNonfatalFailures) {
-  FailFatally();
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-// A wrapper for calling HasNonfatalFailure outside of a test body.
-static bool HasNonfatalFailureHelper() {
-  return testing::Test::HasNonfatalFailure();
-}
-
-TEST(HasNonfatalFailureTest, WorksOutsideOfTestBody) {
-  EXPECT_FALSE(HasNonfatalFailureHelper());
-}
-
-TEST(HasNonfatalFailureTest, WorksOutsideOfTestBody2) {
-  ADD_FAILURE();
-  const bool has_nonfatal_failure = HasNonfatalFailureHelper();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_nonfatal_failure);
-}
-
-TEST(HasFailureTest, ReturnsFalseWhenThereIsNoFailure) {
-  EXPECT_FALSE(HasFailure());
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereIsFatalFailure) {
-  FailFatally();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereIsNonfatalFailure) {
-  ADD_FAILURE();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-TEST(HasFailureTest, ReturnsTrueWhenThereAreFatalAndNonfatalFailures) {
-  FailFatally();
-  ADD_FAILURE();
-  const bool has_failure = HasFailure();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-// A wrapper for calling HasFailure outside of a test body.
-static bool HasFailureHelper() { return testing::Test::HasFailure(); }
-
-TEST(HasFailureTest, WorksOutsideOfTestBody) {
-  EXPECT_FALSE(HasFailureHelper());
-}
-
-TEST(HasFailureTest, WorksOutsideOfTestBody2) {
-  ADD_FAILURE();
-  const bool has_failure = HasFailureHelper();
-  ClearCurrentTestPartResults();
-  EXPECT_TRUE(has_failure);
-}
-
-class TestListener : public EmptyTestEventListener {
- public:
-  TestListener() : on_start_counter_(nullptr), is_destroyed_(nullptr) {}
-  TestListener(int* on_start_counter, bool* is_destroyed)
-      : on_start_counter_(on_start_counter),
-        is_destroyed_(is_destroyed) {}
-
-  ~TestListener() override {
-    if (is_destroyed_)
-      *is_destroyed_ = true;
-  }
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    if (on_start_counter_ != nullptr) (*on_start_counter_)++;
-  }
-
- private:
-  int* on_start_counter_;
-  bool* is_destroyed_;
-};
-
-// Tests the constructor.
-TEST(TestEventListenersTest, ConstructionWorks) {
-  TestEventListeners listeners;
-
-  EXPECT_TRUE(TestEventListenersAccessor::GetRepeater(&listeners) != nullptr);
-  EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-  EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-}
-
-// Tests that the TestEventListeners destructor deletes all the listeners it
-// owns.
-TEST(TestEventListenersTest, DestructionWorks) {
-  bool default_result_printer_is_destroyed = false;
-  bool default_xml_printer_is_destroyed = false;
-  bool extra_listener_is_destroyed = false;
-  TestListener* default_result_printer =
-      new TestListener(nullptr, &default_result_printer_is_destroyed);
-  TestListener* default_xml_printer =
-      new TestListener(nullptr, &default_xml_printer_is_destroyed);
-  TestListener* extra_listener =
-      new TestListener(nullptr, &extra_listener_is_destroyed);
-
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultResultPrinter(&listeners,
-                                                        default_result_printer);
-    TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners,
-                                                       default_xml_printer);
-    listeners.Append(extra_listener);
-  }
-  EXPECT_TRUE(default_result_printer_is_destroyed);
-  EXPECT_TRUE(default_xml_printer_is_destroyed);
-  EXPECT_TRUE(extra_listener_is_destroyed);
-}
-
-// Tests that a listener Append'ed to a TestEventListeners list starts
-// receiving events.
-TEST(TestEventListenersTest, Append) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    listeners.Append(listener);
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(1, on_start_counter);
-  }
-  EXPECT_TRUE(is_destroyed);
-}
-
-// Tests that listeners receive events in the order they were appended to
-// the list, except for *End requests, which must be received in the reverse
-// order.
-class SequenceTestingListener : public EmptyTestEventListener {
- public:
-  SequenceTestingListener(std::vector<std::string>* vector, const char* id)
-      : vector_(vector), id_(id) {}
-
- protected:
-  void OnTestProgramStart(const UnitTest& /*unit_test*/) override {
-    vector_->push_back(GetEventDescription("OnTestProgramStart"));
-  }
-
-  void OnTestProgramEnd(const UnitTest& /*unit_test*/) override {
-    vector_->push_back(GetEventDescription("OnTestProgramEnd"));
-  }
-
-  void OnTestIterationStart(const UnitTest& /*unit_test*/,
-                            int /*iteration*/) override {
-    vector_->push_back(GetEventDescription("OnTestIterationStart"));
-  }
-
-  void OnTestIterationEnd(const UnitTest& /*unit_test*/,
-                          int /*iteration*/) override {
-    vector_->push_back(GetEventDescription("OnTestIterationEnd"));
-  }
-
- private:
-  std::string GetEventDescription(const char* method) {
-    Message message;
-    message << id_ << "." << method;
-    return message.GetString();
-  }
-
-  std::vector<std::string>* vector_;
-  const char* const id_;
-
-  GTEST_DISALLOW_COPY_AND_ASSIGN_(SequenceTestingListener);
-};
-
-TEST(EventListenerTest, AppendKeepsOrder) {
-  std::vector<std::string> vec;
-  TestEventListeners listeners;
-  listeners.Append(new SequenceTestingListener(&vec, "1st"));
-  listeners.Append(new SequenceTestingListener(&vec, "2nd"));
-  listeners.Append(new SequenceTestingListener(&vec, "3rd"));
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("1st.OnTestProgramStart", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestProgramStart", vec[1].c_str());
-  EXPECT_STREQ("3rd.OnTestProgramStart", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramEnd(
-      *UnitTest::GetInstance());
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("3rd.OnTestProgramEnd", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestProgramEnd", vec[1].c_str());
-  EXPECT_STREQ("1st.OnTestProgramEnd", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestIterationStart(
-      *UnitTest::GetInstance(), 0);
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("1st.OnTestIterationStart", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestIterationStart", vec[1].c_str());
-  EXPECT_STREQ("3rd.OnTestIterationStart", vec[2].c_str());
-
-  vec.clear();
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestIterationEnd(
-      *UnitTest::GetInstance(), 0);
-  ASSERT_EQ(3U, vec.size());
-  EXPECT_STREQ("3rd.OnTestIterationEnd", vec[0].c_str());
-  EXPECT_STREQ("2nd.OnTestIterationEnd", vec[1].c_str());
-  EXPECT_STREQ("1st.OnTestIterationEnd", vec[2].c_str());
-}
-
-// Tests that a listener removed from a TestEventListeners list stops receiving
-// events and is not deleted when the list is destroyed.
-TEST(TestEventListenersTest, Release) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    listeners.Append(listener);
-    EXPECT_EQ(listener, listeners.Release(listener));
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_TRUE(listeners.Release(listener) == nullptr);
-  }
-  EXPECT_EQ(0, on_start_counter);
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Tests that no events are forwarded when event forwarding is disabled.
-TEST(EventListenerTest, SuppressEventForwarding) {
-  int on_start_counter = 0;
-  TestListener* listener = new TestListener(&on_start_counter, nullptr);
-
-  TestEventListeners listeners;
-  listeners.Append(listener);
-  ASSERT_TRUE(TestEventListenersAccessor::EventForwardingEnabled(listeners));
-  TestEventListenersAccessor::SuppressEventForwarding(&listeners);
-  ASSERT_FALSE(TestEventListenersAccessor::EventForwardingEnabled(listeners));
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(0, on_start_counter);
-}
-
-// Tests that events generated by Google Test are not forwarded in
-// death test subprocesses.
-TEST(EventListenerDeathTest, EventsNotForwardedInDeathTestSubprecesses) {
-  EXPECT_DEATH_IF_SUPPORTED({
-      GTEST_CHECK_(TestEventListenersAccessor::EventForwardingEnabled(
-          *GetUnitTestImpl()->listeners())) << "expected failure";},
-      "expected failure");
-}
-
-// Tests that a listener installed via SetDefaultResultPrinter() starts
-// receiving events and is returned via default_result_printer() and that
-// the previous default_result_printer is removed from the list and deleted.
-TEST(EventListenerTest, default_result_printer) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-
-  TestEventListeners listeners;
-  TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, listener);
-
-  EXPECT_EQ(listener, listeners.default_result_printer());
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-
-  EXPECT_EQ(1, on_start_counter);
-
-  // Replacing default_result_printer with something else should remove it
-  // from the list and destroy it.
-  TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, nullptr);
-
-  EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-  EXPECT_TRUE(is_destroyed);
-
-  // After broadcasting an event the counter is still the same, indicating
-  // the listener is not in the list anymore.
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(1, on_start_counter);
-}
-
-// Tests that the default_result_printer listener stops receiving events
-// when removed via Release and that is not owned by the list anymore.
-TEST(EventListenerTest, RemovingDefaultResultPrinterWorks) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultResultPrinter(&listeners, listener);
-
-    EXPECT_EQ(listener, listeners.Release(listener));
-    EXPECT_TRUE(listeners.default_result_printer() == nullptr);
-    EXPECT_FALSE(is_destroyed);
-
-    // Broadcasting events now should not affect default_result_printer.
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(0, on_start_counter);
-  }
-  // Destroying the list should not affect the listener now, too.
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Tests that a listener installed via SetDefaultXmlGenerator() starts
-// receiving events and is returned via default_xml_generator() and that
-// the previous default_xml_generator is removed from the list and deleted.
-TEST(EventListenerTest, default_xml_generator) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-
-  TestEventListeners listeners;
-  TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, listener);
-
-  EXPECT_EQ(listener, listeners.default_xml_generator());
-
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-
-  EXPECT_EQ(1, on_start_counter);
-
-  // Replacing default_xml_generator with something else should remove it
-  // from the list and destroy it.
-  TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, nullptr);
-
-  EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-  EXPECT_TRUE(is_destroyed);
-
-  // After broadcasting an event the counter is still the same, indicating
-  // the listener is not in the list anymore.
-  TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-      *UnitTest::GetInstance());
-  EXPECT_EQ(1, on_start_counter);
-}
-
-// Tests that the default_xml_generator listener stops receiving events
-// when removed via Release and that is not owned by the list anymore.
-TEST(EventListenerTest, RemovingDefaultXmlGeneratorWorks) {
-  int on_start_counter = 0;
-  bool is_destroyed = false;
-  // Although Append passes the ownership of this object to the list,
-  // the following calls release it, and we need to delete it before the
-  // test ends.
-  TestListener* listener = new TestListener(&on_start_counter, &is_destroyed);
-  {
-    TestEventListeners listeners;
-    TestEventListenersAccessor::SetDefaultXmlGenerator(&listeners, listener);
-
-    EXPECT_EQ(listener, listeners.Release(listener));
-    EXPECT_TRUE(listeners.default_xml_generator() == nullptr);
-    EXPECT_FALSE(is_destroyed);
-
-    // Broadcasting events now should not affect default_xml_generator.
-    TestEventListenersAccessor::GetRepeater(&listeners)->OnTestProgramStart(
-        *UnitTest::GetInstance());
-    EXPECT_EQ(0, on_start_counter);
-  }
-  // Destroying the list should not affect the listener now, too.
-  EXPECT_FALSE(is_destroyed);
-  delete listener;
-}
-
-// Sanity tests to ensure that the alternative, verbose spellings of
-// some of the macros work.  We don't test them thoroughly as that
-// would be quite involved.  Since their implementations are
-// straightforward, and they are rarely used, we'll just rely on the
-// users to tell us when they are broken.
-GTEST_TEST(AlternativeNameTest, Works) {  // GTEST_TEST is the same as TEST.
-  GTEST_SUCCEED() << "OK";  // GTEST_SUCCEED is the same as SUCCEED.
-
-  // GTEST_FAIL is the same as FAIL.
-  EXPECT_FATAL_FAILURE(GTEST_FAIL() << "An expected failure",
-                       "An expected failure");
-
-  // GTEST_ASSERT_XY is the same as ASSERT_XY.
-
-  GTEST_ASSERT_EQ(0, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_EQ(0, 1) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_EQ(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_NE(0, 1);
-  GTEST_ASSERT_NE(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_NE(0, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_LE(0, 0);
-  GTEST_ASSERT_LE(0, 1);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LE(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_LT(0, 1);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LT(0, 0) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_LT(1, 0) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_GE(0, 0);
-  GTEST_ASSERT_GE(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GE(0, 1) << "An expected failure",
-                       "An expected failure");
-
-  GTEST_ASSERT_GT(1, 0);
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GT(0, 1) << "An expected failure",
-                       "An expected failure");
-  EXPECT_FATAL_FAILURE(GTEST_ASSERT_GT(1, 1) << "An expected failure",
-                       "An expected failure");
-}
-
-// Tests for internal utilities necessary for implementation of the universal
-// printing.
-
-class ConversionHelperBase {};
-class ConversionHelperDerived : public ConversionHelperBase {};
-
-// Tests that IsAProtocolMessage<T>::value is a compile-time constant.
-TEST(IsAProtocolMessageTest, ValueIsCompileTimeConstant) {
-  GTEST_COMPILE_ASSERT_(IsAProtocolMessage<::proto2::Message>::value,
-                        const_true);
-  GTEST_COMPILE_ASSERT_(!IsAProtocolMessage<int>::value, const_false);
-}
-
-// Tests that IsAProtocolMessage<T>::value is true when T is
-// proto2::Message or a sub-class of it.
-TEST(IsAProtocolMessageTest, ValueIsTrueWhenTypeIsAProtocolMessage) {
-  EXPECT_TRUE(IsAProtocolMessage< ::proto2::Message>::value);
-}
-
-// Tests that IsAProtocolMessage<T>::value is false when T is neither
-// ::proto2::Message nor a sub-class of it.
-TEST(IsAProtocolMessageTest, ValueIsFalseWhenTypeIsNotAProtocolMessage) {
-  EXPECT_FALSE(IsAProtocolMessage<int>::value);
-  EXPECT_FALSE(IsAProtocolMessage<const ConversionHelperBase>::value);
-}
-
-// Tests GTEST_REMOVE_REFERENCE_AND_CONST_.
-
-template <typename T1, typename T2>
-void TestGTestRemoveReferenceAndConst() {
-  static_assert(std::is_same<T1, GTEST_REMOVE_REFERENCE_AND_CONST_(T2)>::value,
-                "GTEST_REMOVE_REFERENCE_AND_CONST_ failed.");
-}
-
-TEST(RemoveReferenceToConstTest, Works) {
-  TestGTestRemoveReferenceAndConst<int, int>();
-  TestGTestRemoveReferenceAndConst<double, double&>();
-  TestGTestRemoveReferenceAndConst<char, const char>();
-  TestGTestRemoveReferenceAndConst<char, const char&>();
-  TestGTestRemoveReferenceAndConst<const char*, const char*>();
-}
-
-// Tests GTEST_REFERENCE_TO_CONST_.
-
-template <typename T1, typename T2>
-void TestGTestReferenceToConst() {
-  static_assert(std::is_same<T1, GTEST_REFERENCE_TO_CONST_(T2)>::value,
-                "GTEST_REFERENCE_TO_CONST_ failed.");
-}
-
-TEST(GTestReferenceToConstTest, Works) {
-  TestGTestReferenceToConst<const char&, char>();
-  TestGTestReferenceToConst<const int&, const int>();
-  TestGTestReferenceToConst<const double&, double>();
-  TestGTestReferenceToConst<const std::string&, const std::string&>();
-}
-
-
-// Tests IsContainerTest.
-
-class NonContainer {};
-
-TEST(IsContainerTestTest, WorksForNonContainer) {
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<int>(0)));
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<char[5]>(0)));
-  EXPECT_EQ(sizeof(IsNotContainer), sizeof(IsContainerTest<NonContainer>(0)));
-}
-
-TEST(IsContainerTestTest, WorksForContainer) {
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<std::vector<bool> >(0)));
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<std::map<int, double> >(0)));
-}
-
-struct ConstOnlyContainerWithPointerIterator {
-  using const_iterator = int*;
-  const_iterator begin() const;
-  const_iterator end() const;
-};
-
-struct ConstOnlyContainerWithClassIterator {
-  struct const_iterator {
-    const int& operator*() const;
-    const_iterator& operator++(/* pre-increment */);
-  };
-  const_iterator begin() const;
-  const_iterator end() const;
-};
-
-TEST(IsContainerTestTest, ConstOnlyContainer) {
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<ConstOnlyContainerWithPointerIterator>(0)));
-  EXPECT_EQ(sizeof(IsContainer),
-            sizeof(IsContainerTest<ConstOnlyContainerWithClassIterator>(0)));
-}
-
-// Tests IsHashTable.
-struct AHashTable {
-  typedef void hasher;
-};
-struct NotReallyAHashTable {
-  typedef void hasher;
-  typedef void reverse_iterator;
-};
-TEST(IsHashTable, Basic) {
-  EXPECT_TRUE(testing::internal::IsHashTable<AHashTable>::value);
-  EXPECT_FALSE(testing::internal::IsHashTable<NotReallyAHashTable>::value);
-  EXPECT_FALSE(testing::internal::IsHashTable<std::vector<int>>::value);
-  EXPECT_TRUE(testing::internal::IsHashTable<std::unordered_set<int>>::value);
-}
-
-// Tests ArrayEq().
-
-TEST(ArrayEqTest, WorksForDegeneratedArrays) {
-  EXPECT_TRUE(ArrayEq(5, 5L));
-  EXPECT_FALSE(ArrayEq('a', 0));
-}
-
-TEST(ArrayEqTest, WorksForOneDimensionalArrays) {
-  // Note that a and b are distinct but compatible types.
-  const int a[] = { 0, 1 };
-  long b[] = { 0, 1 };
-  EXPECT_TRUE(ArrayEq(a, b));
-  EXPECT_TRUE(ArrayEq(a, 2, b));
-
-  b[0] = 2;
-  EXPECT_FALSE(ArrayEq(a, b));
-  EXPECT_FALSE(ArrayEq(a, 1, b));
-}
-
-TEST(ArrayEqTest, WorksForTwoDimensionalArrays) {
-  const char a[][3] = { "hi", "lo" };
-  const char b[][3] = { "hi", "lo" };
-  const char c[][3] = { "hi", "li" };
-
-  EXPECT_TRUE(ArrayEq(a, b));
-  EXPECT_TRUE(ArrayEq(a, 2, b));
-
-  EXPECT_FALSE(ArrayEq(a, c));
-  EXPECT_FALSE(ArrayEq(a, 2, c));
-}
-
-// Tests ArrayAwareFind().
-
-TEST(ArrayAwareFindTest, WorksForOneDimensionalArray) {
-  const char a[] = "hello";
-  EXPECT_EQ(a + 4, ArrayAwareFind(a, a + 5, 'o'));
-  EXPECT_EQ(a + 5, ArrayAwareFind(a, a + 5, 'x'));
-}
-
-TEST(ArrayAwareFindTest, WorksForTwoDimensionalArray) {
-  int a[][2] = { { 0, 1 }, { 2, 3 }, { 4, 5 } };
-  const int b[2] = { 2, 3 };
-  EXPECT_EQ(a + 1, ArrayAwareFind(a, a + 3, b));
-
-  const int c[2] = { 6, 7 };
-  EXPECT_EQ(a + 3, ArrayAwareFind(a, a + 3, c));
-}
-
-// Tests CopyArray().
-
-TEST(CopyArrayTest, WorksForDegeneratedArrays) {
-  int n = 0;
-  CopyArray('a', &n);
-  EXPECT_EQ('a', n);
-}
-
-TEST(CopyArrayTest, WorksForOneDimensionalArrays) {
-  const char a[3] = "hi";
-  int b[3];
-#ifndef __BORLANDC__  // C++Builder cannot compile some array size deductions.
-  CopyArray(a, &b);
-  EXPECT_TRUE(ArrayEq(a, b));
-#endif
-
-  int c[3];
-  CopyArray(a, 3, c);
-  EXPECT_TRUE(ArrayEq(a, c));
-}
-
-TEST(CopyArrayTest, WorksForTwoDimensionalArrays) {
-  const int a[2][3] = { { 0, 1, 2 }, { 3, 4, 5 } };
-  int b[2][3];
-#ifndef __BORLANDC__  // C++Builder cannot compile some array size deductions.
-  CopyArray(a, &b);
-  EXPECT_TRUE(ArrayEq(a, b));
-#endif
-
-  int c[2][3];
-  CopyArray(a, 2, c);
-  EXPECT_TRUE(ArrayEq(a, c));
-}
-
-// Tests NativeArray.
-
-TEST(NativeArrayTest, ConstructorFromArrayWorks) {
-  const int a[3] = { 0, 1, 2 };
-  NativeArray<int> na(a, 3, RelationToSourceReference());
-  EXPECT_EQ(3U, na.size());
-  EXPECT_EQ(a, na.begin());
-}
-
-TEST(NativeArrayTest, CreatesAndDeletesCopyOfArrayWhenAskedTo) {
-  typedef int Array[2];
-  Array* a = new Array[1];
-  (*a)[0] = 0;
-  (*a)[1] = 1;
-  NativeArray<int> na(*a, 2, RelationToSourceCopy());
-  EXPECT_NE(*a, na.begin());
-  delete[] a;
-  EXPECT_EQ(0, na.begin()[0]);
-  EXPECT_EQ(1, na.begin()[1]);
-
-  // We rely on the heap checker to verify that na deletes the copy of
-  // array.
-}
-
-TEST(NativeArrayTest, TypeMembersAreCorrect) {
-  StaticAssertTypeEq<char, NativeArray<char>::value_type>();
-  StaticAssertTypeEq<int[2], NativeArray<int[2]>::value_type>();
-
-  StaticAssertTypeEq<const char*, NativeArray<char>::const_iterator>();
-  StaticAssertTypeEq<const bool(*)[2], NativeArray<bool[2]>::const_iterator>();
-}
-
-TEST(NativeArrayTest, MethodsWork) {
-  const int a[3] = { 0, 1, 2 };
-  NativeArray<int> na(a, 3, RelationToSourceCopy());
-  ASSERT_EQ(3U, na.size());
-  EXPECT_EQ(3, na.end() - na.begin());
-
-  NativeArray<int>::const_iterator it = na.begin();
-  EXPECT_EQ(0, *it);
-  ++it;
-  EXPECT_EQ(1, *it);
-  it++;
-  EXPECT_EQ(2, *it);
-  ++it;
-  EXPECT_EQ(na.end(), it);
-
-  EXPECT_TRUE(na == na);
-
-  NativeArray<int> na2(a, 3, RelationToSourceReference());
-  EXPECT_TRUE(na == na2);
-
-  const int b1[3] = { 0, 1, 1 };
-  const int b2[4] = { 0, 1, 2, 3 };
-  EXPECT_FALSE(na == NativeArray<int>(b1, 3, RelationToSourceReference()));
-  EXPECT_FALSE(na == NativeArray<int>(b2, 4, RelationToSourceCopy()));
-}
-
-TEST(NativeArrayTest, WorksForTwoDimensionalArray) {
-  const char a[2][3] = { "hi", "lo" };
-  NativeArray<char[3]> na(a, 2, RelationToSourceReference());
-  ASSERT_EQ(2U, na.size());
-  EXPECT_EQ(a, na.begin());
-}
-
-// IndexSequence
-TEST(IndexSequence, MakeIndexSequence) {
-  using testing::internal::IndexSequence;
-  using testing::internal::MakeIndexSequence;
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<>, MakeIndexSequence<0>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<0>, MakeIndexSequence<1>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<IndexSequence<0, 1>, MakeIndexSequence<2>::type>::value));
-  EXPECT_TRUE((
-      std::is_same<IndexSequence<0, 1, 2>, MakeIndexSequence<3>::type>::value));
-  EXPECT_TRUE(
-      (std::is_base_of<IndexSequence<0, 1, 2>, MakeIndexSequence<3>>::value));
-}
-
-// ElemFromList
-TEST(ElemFromList, Basic) {
-  using testing::internal::ElemFromList;
-  using Idx = testing::internal::MakeIndexSequence<3>::type;
-  EXPECT_TRUE((
-      std::is_same<int, ElemFromList<0, Idx, int, double, char>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<double,
-                    ElemFromList<1, Idx, int, double, char>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<char,
-                    ElemFromList<2, Idx, int, double, char>::type>::value));
-  EXPECT_TRUE(
-      (std::is_same<
-          char, ElemFromList<7, testing::internal::MakeIndexSequence<12>::type,
-                             int, int, int, int, int, int, int, char, int, int,
-                             int, int>::type>::value));
-}
-
-// FlatTuple
-TEST(FlatTuple, Basic) {
-  using testing::internal::FlatTuple;
-
-  FlatTuple<int, double, const char*> tuple = {};
-  EXPECT_EQ(0, tuple.Get<0>());
-  EXPECT_EQ(0.0, tuple.Get<1>());
-  EXPECT_EQ(nullptr, tuple.Get<2>());
-
-  tuple = FlatTuple<int, double, const char*>(7, 3.2, "Foo");
-  EXPECT_EQ(7, tuple.Get<0>());
-  EXPECT_EQ(3.2, tuple.Get<1>());
-  EXPECT_EQ(std::string("Foo"), tuple.Get<2>());
-
-  tuple.Get<1>() = 5.1;
-  EXPECT_EQ(5.1, tuple.Get<1>());
-}
-
-TEST(FlatTuple, ManyTypes) {
-  using testing::internal::FlatTuple;
-
-  // Instantiate FlatTuple with 257 ints.
-  // Tests show that we can do it with thousands of elements, but very long
-  // compile times makes it unusuitable for this test.
-#define GTEST_FLAT_TUPLE_INT8 int, int, int, int, int, int, int, int,
-#define GTEST_FLAT_TUPLE_INT16 GTEST_FLAT_TUPLE_INT8 GTEST_FLAT_TUPLE_INT8
-#define GTEST_FLAT_TUPLE_INT32 GTEST_FLAT_TUPLE_INT16 GTEST_FLAT_TUPLE_INT16
-#define GTEST_FLAT_TUPLE_INT64 GTEST_FLAT_TUPLE_INT32 GTEST_FLAT_TUPLE_INT32
-#define GTEST_FLAT_TUPLE_INT128 GTEST_FLAT_TUPLE_INT64 GTEST_FLAT_TUPLE_INT64
-#define GTEST_FLAT_TUPLE_INT256 GTEST_FLAT_TUPLE_INT128 GTEST_FLAT_TUPLE_INT128
-
-  // Let's make sure that we can have a very long list of types without blowing
-  // up the template instantiation depth.
-  FlatTuple<GTEST_FLAT_TUPLE_INT256 int> tuple;
-
-  tuple.Get<0>() = 7;
-  tuple.Get<99>() = 17;
-  tuple.Get<256>() = 1000;
-  EXPECT_EQ(7, tuple.Get<0>());
-  EXPECT_EQ(17, tuple.Get<99>());
-  EXPECT_EQ(1000, tuple.Get<256>());
-}
-
-// Tests SkipPrefix().
-
-TEST(SkipPrefixTest, SkipsWhenPrefixMatches) {
-  const char* const str = "hello";
-
-  const char* p = str;
-  EXPECT_TRUE(SkipPrefix("", &p));
-  EXPECT_EQ(str, p);
-
-  p = str;
-  EXPECT_TRUE(SkipPrefix("hell", &p));
-  EXPECT_EQ(str + 4, p);
-}
-
-TEST(SkipPrefixTest, DoesNotSkipWhenPrefixDoesNotMatch) {
-  const char* const str = "world";
-
-  const char* p = str;
-  EXPECT_FALSE(SkipPrefix("W", &p));
-  EXPECT_EQ(str, p);
-
-  p = str;
-  EXPECT_FALSE(SkipPrefix("world!", &p));
-  EXPECT_EQ(str, p);
-}
-
-// Tests ad_hoc_test_result().
-
-class AdHocTestResultTest : public testing::Test {
- protected:
-  static void SetUpTestSuite() {
-    FAIL() << "A failure happened inside SetUpTestSuite().";
-  }
-};
-
-TEST_F(AdHocTestResultTest, AdHocTestResultForTestSuiteShowsFailure) {
-  const testing::TestResult& test_result = testing::UnitTest::GetInstance()
-                                               ->current_test_suite()
-                                               ->ad_hoc_test_result();
-  EXPECT_TRUE(test_result.Failed());
-}
-
-TEST_F(AdHocTestResultTest, AdHocTestResultTestForUnitTestDoesNotShowFailure) {
-  const testing::TestResult& test_result =
-      testing::UnitTest::GetInstance()->ad_hoc_test_result();
-  EXPECT_FALSE(test_result.Failed());
-}
-
-class DynamicUnitTestFixture : public testing::Test {};
-
-class DynamicTest : public DynamicUnitTestFixture {
-  void TestBody() override { EXPECT_TRUE(true); }
-};
-
-auto* dynamic_test = testing::RegisterTest(
-    "DynamicUnitTestFixture", "DynamicTest", "TYPE", "VALUE", __FILE__,
-    __LINE__, []() -> DynamicUnitTestFixture* { return new DynamicTest; });
-
-TEST(RegisterTest, WasRegistered) {
-  auto* unittest = testing::UnitTest::GetInstance();
-  for (int i = 0; i < unittest->total_test_suite_count(); ++i) {
-    auto* tests = unittest->GetTestSuite(i);
-    if (tests->name() != std::string("DynamicUnitTestFixture")) continue;
-    for (int j = 0; j < tests->total_test_count(); ++j) {
-      if (tests->GetTestInfo(j)->name() != std::string("DynamicTest")) continue;
-      // Found it.
-      EXPECT_STREQ(tests->GetTestInfo(j)->value_param(), "VALUE");
-      EXPECT_STREQ(tests->GetTestInfo(j)->type_param(), "TYPE");
-      return;
-    }
-  }
-
-  FAIL() << "Didn't find the test!";
-}
diff --git a/3rdparty/gtest/test/gtest_xml_outfile1_test_.cc b/3rdparty/gtest/test/gtest_xml_outfile1_test_.cc
deleted file mode 100644
index 19aa252a..00000000
--- a/3rdparty/gtest/test/gtest_xml_outfile1_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// gtest_xml_outfile1_test_ writes some xml via TestProperty used by
-// gtest_xml_outfiles_test.py
-
-#include "gtest/gtest.h"
-
-class PropertyOne : public testing::Test {
- protected:
-  void SetUp() override { RecordProperty("SetUpProp", 1); }
-  void TearDown() override { RecordProperty("TearDownProp", 1); }
-};
-
-TEST_F(PropertyOne, TestSomeProperties) {
-  RecordProperty("TestSomeProperty", 1);
-}
diff --git a/3rdparty/gtest/test/gtest_xml_outfile2_test_.cc b/3rdparty/gtest/test/gtest_xml_outfile2_test_.cc
deleted file mode 100644
index f9a2a6e9..00000000
--- a/3rdparty/gtest/test/gtest_xml_outfile2_test_.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Copyright 2008, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// gtest_xml_outfile2_test_ writes some xml via TestProperty used by
-// gtest_xml_outfiles_test.py
-
-#include "gtest/gtest.h"
-
-class PropertyTwo : public testing::Test {
- protected:
-  void SetUp() override { RecordProperty("SetUpProp", 2); }
-  void TearDown() override { RecordProperty("TearDownProp", 2); }
-};
-
-TEST_F(PropertyTwo, TestSomeProperties) {
-  RecordProperty("TestSomeProperty", 2);
-}
diff --git a/3rdparty/gtest/test/gtest_xml_outfiles_test.py b/3rdparty/gtest/test/gtest_xml_outfiles_test.py
deleted file mode 100644
index e093f6f0..00000000
--- a/3rdparty/gtest/test/gtest_xml_outfiles_test.py
+++ /dev/null
@@ -1,135 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2008, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_xml_output module."""
-
-import os
-from xml.dom import minidom, Node
-import gtest_test_utils
-import gtest_xml_test_utils
-
-GTEST_OUTPUT_SUBDIR = "xml_outfiles"
-GTEST_OUTPUT_1_TEST = "gtest_xml_outfile1_test_"
-GTEST_OUTPUT_2_TEST = "gtest_xml_outfile2_test_"
-
-EXPECTED_XML_1 = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests">
-  <testsuite name="PropertyOne" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="TestSomeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyOne">
-      <properties>
-        <property name="SetUpProp" value="1"/>
-        <property name="TestSomeProperty" value="1"/>
-        <property name="TearDownProp" value="1"/>
-      </properties>
-    </testcase>
-  </testsuite>
-</testsuites>
-"""
-
-EXPECTED_XML_2 = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests">
-  <testsuite name="PropertyTwo" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="TestSomeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyTwo">
-      <properties>
-        <property name="SetUpProp" value="2"/>
-        <property name="TestSomeProperty" value="2"/>
-        <property name="TearDownProp" value="2"/>
-      </properties>
-    </testcase>
-  </testsuite>
-</testsuites>
-"""
-
-
-class GTestXMLOutFilesTest(gtest_xml_test_utils.GTestXMLTestCase):
-  """Unit test for Google Test's XML output functionality."""
-
-  def setUp(self):
-    # We want the trailing '/' that the last "" provides in os.path.join, for
-    # telling Google Test to create an output directory instead of a single file
-    # for xml output.
-    self.output_dir_ = os.path.join(gtest_test_utils.GetTempDir(),
-                                    GTEST_OUTPUT_SUBDIR, "")
-    self.DeleteFilesAndDir()
-
-  def tearDown(self):
-    self.DeleteFilesAndDir()
-
-  def DeleteFilesAndDir(self):
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_1_TEST + ".xml"))
-    except os.error:
-      pass
-    try:
-      os.remove(os.path.join(self.output_dir_, GTEST_OUTPUT_2_TEST + ".xml"))
-    except os.error:
-      pass
-    try:
-      os.rmdir(self.output_dir_)
-    except os.error:
-      pass
-
-  def testOutfile1(self):
-    self._TestOutFile(GTEST_OUTPUT_1_TEST, EXPECTED_XML_1)
-
-  def testOutfile2(self):
-    self._TestOutFile(GTEST_OUTPUT_2_TEST, EXPECTED_XML_2)
-
-  def _TestOutFile(self, test_name, expected_xml):
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(test_name)
-    command = [gtest_prog_path, "--gtest_output=xml:%s" % self.output_dir_]
-    p = gtest_test_utils.Subprocess(command,
-                                    working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-
-    output_file_name1 = test_name + ".xml"
-    output_file1 = os.path.join(self.output_dir_, output_file_name1)
-    output_file_name2 = 'lt-' + output_file_name1
-    output_file2 = os.path.join(self.output_dir_, output_file_name2)
-    self.assert_(os.path.isfile(output_file1) or os.path.isfile(output_file2),
-                 output_file1)
-
-    expected = minidom.parseString(expected_xml)
-    if os.path.isfile(output_file1):
-      actual = minidom.parse(output_file1)
-    else:
-      actual = minidom.parse(output_file2)
-    self.NormalizeXml(actual.documentElement)
-    self.AssertEquivalentNodes(expected.documentElement,
-                               actual.documentElement)
-    expected.unlink()
-    actual.unlink()
-
-
-if __name__ == "__main__":
-  os.environ["GTEST_STACK_TRACE_DEPTH"] = "0"
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_xml_output_unittest.py b/3rdparty/gtest/test/gtest_xml_output_unittest.py
deleted file mode 100644
index 63b1af0b..00000000
--- a/3rdparty/gtest/test/gtest_xml_output_unittest.py
+++ /dev/null
@@ -1,389 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test for the gtest_xml_output module"""
-
-import datetime
-import errno
-import os
-import re
-import sys
-from xml.dom import minidom, Node
-
-import gtest_test_utils
-import gtest_xml_test_utils
-
-GTEST_FILTER_FLAG = '--gtest_filter'
-GTEST_LIST_TESTS_FLAG = '--gtest_list_tests'
-GTEST_OUTPUT_FLAG = '--gtest_output'
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.xml'
-GTEST_PROGRAM_NAME = 'gtest_xml_output_unittest_'
-
-# The flag indicating stacktraces are not supported
-NO_STACKTRACE_SUPPORT_FLAG = '--no_stacktrace_support'
-
-# The environment variables for test sharding.
-TOTAL_SHARDS_ENV_VAR = 'GTEST_TOTAL_SHARDS'
-SHARD_INDEX_ENV_VAR = 'GTEST_SHARD_INDEX'
-SHARD_STATUS_FILE_ENV_VAR = 'GTEST_SHARD_STATUS_FILE'
-
-SUPPORTS_STACK_TRACES = NO_STACKTRACE_SUPPORT_FLAG not in sys.argv
-
-if SUPPORTS_STACK_TRACES:
-  STACK_TRACE_TEMPLATE = '\nStack trace:\n*'
-else:
-  STACK_TRACE_TEMPLATE = ''
-  # unittest.main() can't handle unknown flags
-  sys.argv.remove(NO_STACKTRACE_SUPPORT_FLAG)
-
-EXPECTED_NON_EMPTY_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="24" failures="4" disabled="2" errors="0" time="*" timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-  <testsuite name="FailedTest" tests="1" failures="1" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="Fails" status="run" result="completed" time="*" timestamp="*" classname="FailedTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  1&#x0A;  2" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  1
-  2%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="MixedResultTest" tests="3" failures="1" disabled="1" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="MixedResultTest"/>
-    <testcase name="Fails" status="run" result="completed" time="*" timestamp="*" classname="MixedResultTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  1&#x0A;  2" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  1
-  2%(stack)s]]></failure>
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Expected equality of these values:&#x0A;  2&#x0A;  3" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Expected equality of these values:
-  2
-  3%(stack)s]]></failure>
-    </testcase>
-    <testcase name="DISABLED_test" status="notrun" result="suppressed" time="*" timestamp="*" classname="MixedResultTest"/>
-  </testsuite>
-  <testsuite name="XmlQuotingTest" tests="1" failures="1" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="OutputsCData" status="run" result="completed" time="*" timestamp="*" classname="XmlQuotingTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Failed&#x0A;XML output: &lt;?xml encoding=&quot;utf-8&quot;&gt;&lt;top&gt;&lt;![CDATA[cdata text]]&gt;&lt;/top&gt;" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Failed
-XML output: <?xml encoding="utf-8"><top><![CDATA[cdata text]]>]]&gt;<![CDATA[</top>%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="InvalidCharactersTest" tests="1" failures="1" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="InvalidCharactersInMessage" status="run" result="completed" time="*" timestamp="*" classname="InvalidCharactersTest">
-      <failure message="gtest_xml_output_unittest_.cc:*&#x0A;Failed&#x0A;Invalid characters in brackets []" type=""><![CDATA[gtest_xml_output_unittest_.cc:*
-Failed
-Invalid characters in brackets []%(stack)s]]></failure>
-    </testcase>
-  </testsuite>
-  <testsuite name="DisabledTest" tests="1" failures="0" disabled="1" errors="0" time="*" timestamp="*">
-    <testcase name="DISABLED_test_not_run" status="notrun" result="suppressed" time="*" timestamp="*" classname="DisabledTest"/>
-  </testsuite>
-  <testsuite name="SkippedTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="Skipped" status="run" result="skipped" time="*" timestamp="*" classname="SkippedTest"/>
-  </testsuite>
-  <testsuite name="PropertyRecordingTest" tests="4" failures="0" disabled="0" errors="0" time="*" timestamp="*" SetUpTestSuite="yes" TearDownTestSuite="aye">
-    <testcase name="OneProperty" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="1"/>
-      </properties>
-    </testcase>
-    <testcase name="IntValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_int" value="1"/>
-      </properties>
-    </testcase>
-    <testcase name="ThreeProperties" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="1"/>
-        <property name="key_2" value="2"/>
-        <property name="key_3" value="3"/>
-      </properties>
-    </testcase>
-    <testcase name="TwoValuesForOneKeyUsesLastValue" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="2"/>
-      </properties>
-    </testcase>
-  </testsuite>
-  <testsuite name="NoFixtureTest" tests="3" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-     <testcase name="RecordProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key" value="1"/>
-       </properties>
-     </testcase>
-     <testcase name="ExternalUtilityThatCallsRecordIntValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key_for_utility_int" value="1"/>
-       </properties>
-     </testcase>
-     <testcase name="ExternalUtilityThatCallsRecordStringValuedProperty" status="run" result="completed" time="*" timestamp="*" classname="NoFixtureTest">
-       <properties>
-         <property name="key_for_utility_string" value="1"/>
-       </properties>
-     </testcase>
-  </testsuite>
-  <testsuite name="Single/ValueParamTest" tests="4" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="HasValueParamAttribute/1" value_param="42" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="AnotherTestThatHasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-    <testcase name="AnotherTestThatHasValueParamAttribute/1" value_param="42" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-  </testsuite>
-  <testsuite name="TypedTest/0" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="TypedTest/0" />
-  </testsuite>
-  <testsuite name="TypedTest/1" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="TypedTest/1" />
-  </testsuite>
-  <testsuite name="Single/TypeParameterizedTestSuite/0" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="Single/TypeParameterizedTestSuite/0" />
-  </testsuite>
-  <testsuite name="Single/TypeParameterizedTestSuite/1" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="HasTypeParamAttribute" type_param="*" status="run" result="completed" time="*" timestamp="*" classname="Single/TypeParameterizedTestSuite/1" />
-  </testsuite>
-</testsuites>""" % {
-    'stack': STACK_TRACE_TEMPLATE
-}
-
-EXPECTED_FILTERED_TEST_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="1" failures="0" disabled="0" errors="0" time="*"
-            timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0"
-             errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-</testsuites>"""
-
-EXPECTED_SHARDED_TEST_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="3" failures="0" disabled="0" errors="0" time="*" timestamp="*" name="AllTests" ad_hoc_property="42">
-  <testsuite name="SuccessfulTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="Succeeds" status="run" result="completed" time="*" timestamp="*" classname="SuccessfulTest"/>
-  </testsuite>
-  <testsuite name="PropertyRecordingTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*" SetUpTestSuite="yes" TearDownTestSuite="aye">
-    <testcase name="TwoValuesForOneKeyUsesLastValue" status="run" result="completed" time="*" timestamp="*" classname="PropertyRecordingTest">
-      <properties>
-        <property name="key_1" value="2"/>
-      </properties>
-    </testcase>
-  </testsuite>
-  <testsuite name="Single/ValueParamTest" tests="1" failures="0" disabled="0" errors="0" time="*" timestamp="*">
-    <testcase name="AnotherTestThatHasValueParamAttribute/0" value_param="33" status="run" result="completed" time="*" timestamp="*" classname="Single/ValueParamTest" />
-  </testsuite>
-</testsuites>"""
-
-EXPECTED_EMPTY_XML = """<?xml version="1.0" encoding="UTF-8"?>
-<testsuites tests="0" failures="0" disabled="0" errors="0" time="*"
-            timestamp="*" name="AllTests">
-</testsuites>"""
-
-GTEST_PROGRAM_PATH = gtest_test_utils.GetTestExecutablePath(GTEST_PROGRAM_NAME)
-
-SUPPORTS_TYPED_TESTS = 'TypedTest' in gtest_test_utils.Subprocess(
-    [GTEST_PROGRAM_PATH, GTEST_LIST_TESTS_FLAG], capture_stderr=False).output
-
-
-class GTestXMLOutputUnitTest(gtest_xml_test_utils.GTestXMLTestCase):
-  """
-  Unit test for Google Test's XML output functionality.
-  """
-
-  # This test currently breaks on platforms that do not support typed and
-  # type-parameterized tests, so we don't run it under them.
-  if SUPPORTS_TYPED_TESTS:
-    def testNonEmptyXmlOutput(self):
-      """
-      Runs a test program that generates a non-empty XML output, and
-      tests that the XML output is expected.
-      """
-      self._TestXmlOutput(GTEST_PROGRAM_NAME, EXPECTED_NON_EMPTY_XML, 1)
-
-  def testEmptyXmlOutput(self):
-    """Verifies XML output for a Google Test binary without actual tests.
-
-    Runs a test program that generates an empty XML output, and
-    tests that the XML output is expected.
-    """
-
-    self._TestXmlOutput('gtest_no_test_unittest', EXPECTED_EMPTY_XML, 0)
-
-  def testTimestampValue(self):
-    """Checks whether the timestamp attribute in the XML output is valid.
-
-    Runs a test program that generates an empty XML output, and checks if
-    the timestamp attribute in the testsuites tag is valid.
-    """
-    actual = self._GetXmlOutput('gtest_no_test_unittest', [], {}, 0)
-    date_time_str = actual.documentElement.getAttributeNode('timestamp').value
-    # datetime.strptime() is only available in Python 2.5+ so we have to
-    # parse the expected datetime manually.
-    match = re.match(r'(\d+)-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)', date_time_str)
-    self.assertTrue(
-        re.match,
-        'XML datettime string %s has incorrect format' % date_time_str)
-    date_time_from_xml = datetime.datetime(
-        year=int(match.group(1)), month=int(match.group(2)),
-        day=int(match.group(3)), hour=int(match.group(4)),
-        minute=int(match.group(5)), second=int(match.group(6)))
-
-    time_delta = abs(datetime.datetime.now() - date_time_from_xml)
-    # timestamp value should be near the current local time
-    self.assertTrue(time_delta < datetime.timedelta(seconds=600),
-                    'time_delta is %s' % time_delta)
-    actual.unlink()
-
-  def testDefaultOutputFile(self):
-    """
-    Confirms that Google Test produces an XML output file with the expected
-    default name if no name is explicitly specified.
-    """
-    output_file = os.path.join(gtest_test_utils.GetTempDir(),
-                               GTEST_DEFAULT_OUTPUT_FILE)
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(
-        'gtest_no_test_unittest')
-    try:
-      os.remove(output_file)
-    except OSError:
-      e = sys.exc_info()[1]
-      if e.errno != errno.ENOENT:
-        raise
-
-    p = gtest_test_utils.Subprocess(
-        [gtest_prog_path, '%s=xml' % GTEST_OUTPUT_FLAG],
-        working_dir=gtest_test_utils.GetTempDir())
-    self.assert_(p.exited)
-    self.assertEquals(0, p.exit_code)
-    self.assert_(os.path.isfile(output_file))
-
-  def testSuppressedXmlOutput(self):
-    """
-    Tests that no XML file is generated if the default XML listener is
-    shut down before RUN_ALL_TESTS is invoked.
-    """
-
-    xml_path = os.path.join(gtest_test_utils.GetTempDir(),
-                            GTEST_PROGRAM_NAME + 'out.xml')
-    if os.path.isfile(xml_path):
-      os.remove(xml_path)
-
-    command = [GTEST_PROGRAM_PATH,
-               '%s=xml:%s' % (GTEST_OUTPUT_FLAG, xml_path),
-               '--shut_down_xml']
-    p = gtest_test_utils.Subprocess(command)
-    if p.terminated_by_signal:
-      # p.signal is available only if p.terminated_by_signal is True.
-      self.assertFalse(
-          p.terminated_by_signal,
-          '%s was killed by signal %d' % (GTEST_PROGRAM_NAME, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(1, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, 1))
-
-    self.assert_(not os.path.isfile(xml_path))
-
-  def testFilteredTestXmlOutput(self):
-    """Verifies XML output when a filter is applied.
-
-    Runs a test program that executes only some tests and verifies that
-    non-selected tests do not show up in the XML output.
-    """
-
-    self._TestXmlOutput(GTEST_PROGRAM_NAME, EXPECTED_FILTERED_TEST_XML, 0,
-                        extra_args=['%s=SuccessfulTest.*' % GTEST_FILTER_FLAG])
-
-  def testShardedTestXmlOutput(self):
-    """Verifies XML output when run using multiple shards.
-
-    Runs a test program that executes only one shard and verifies that tests
-    from other shards do not show up in the XML output.
-    """
-
-    self._TestXmlOutput(
-        GTEST_PROGRAM_NAME,
-        EXPECTED_SHARDED_TEST_XML,
-        0,
-        extra_env={SHARD_INDEX_ENV_VAR: '0',
-                   TOTAL_SHARDS_ENV_VAR: '10'})
-
-  def _GetXmlOutput(self, gtest_prog_name, extra_args, extra_env,
-                    expected_exit_code):
-    """
-    Returns the xml output generated by running the program gtest_prog_name.
-    Furthermore, the program's exit code must be expected_exit_code.
-    """
-    xml_path = os.path.join(gtest_test_utils.GetTempDir(),
-                            gtest_prog_name + 'out.xml')
-    gtest_prog_path = gtest_test_utils.GetTestExecutablePath(gtest_prog_name)
-
-    command = ([gtest_prog_path, '%s=xml:%s' % (GTEST_OUTPUT_FLAG, xml_path)] +
-               extra_args)
-    environ_copy = os.environ.copy()
-    if extra_env:
-      environ_copy.update(extra_env)
-    p = gtest_test_utils.Subprocess(command, env=environ_copy)
-
-    if p.terminated_by_signal:
-      self.assert_(False,
-                   '%s was killed by signal %d' % (gtest_prog_name, p.signal))
-    else:
-      self.assert_(p.exited)
-      self.assertEquals(expected_exit_code, p.exit_code,
-                        "'%s' exited with code %s, which doesn't match "
-                        'the expected exit code %s.'
-                        % (command, p.exit_code, expected_exit_code))
-    actual = minidom.parse(xml_path)
-    return actual
-
-  def _TestXmlOutput(self, gtest_prog_name, expected_xml,
-                     expected_exit_code, extra_args=None, extra_env=None):
-    """
-    Asserts that the XML document generated by running the program
-    gtest_prog_name matches expected_xml, a string containing another
-    XML document.  Furthermore, the program's exit code must be
-    expected_exit_code.
-    """
-
-    actual = self._GetXmlOutput(gtest_prog_name, extra_args or [],
-                                extra_env or {}, expected_exit_code)
-    expected = minidom.parseString(expected_xml)
-    self.NormalizeXml(actual.documentElement)
-    self.AssertEquivalentNodes(expected.documentElement,
-                               actual.documentElement)
-    expected.unlink()
-    actual.unlink()
-
-
-if __name__ == '__main__':
-  os.environ['GTEST_STACK_TRACE_DEPTH'] = '1'
-  gtest_test_utils.Main()
diff --git a/3rdparty/gtest/test/gtest_xml_output_unittest_.cc b/3rdparty/gtest/test/gtest_xml_output_unittest_.cc
deleted file mode 100644
index c95fd66c..00000000
--- a/3rdparty/gtest/test/gtest_xml_output_unittest_.cc
+++ /dev/null
@@ -1,188 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-// Unit test for Google Test XML output.
-//
-// A user can specify XML output in a Google Test program to run via
-// either the GTEST_OUTPUT environment variable or the --gtest_output
-// flag.  This is used for testing such functionality.
-//
-// This program will be invoked from a Python unit test.  Don't run it
-// directly.
-
-#include "gtest/gtest.h"
-
-using ::testing::InitGoogleTest;
-using ::testing::TestEventListeners;
-using ::testing::TestWithParam;
-using ::testing::UnitTest;
-using ::testing::Test;
-using ::testing::Values;
-
-class SuccessfulTest : public Test {
-};
-
-TEST_F(SuccessfulTest, Succeeds) {
-  SUCCEED() << "This is a success.";
-  ASSERT_EQ(1, 1);
-}
-
-class FailedTest : public Test {
-};
-
-TEST_F(FailedTest, Fails) {
-  ASSERT_EQ(1, 2);
-}
-
-class DisabledTest : public Test {
-};
-
-TEST_F(DisabledTest, DISABLED_test_not_run) {
-  FAIL() << "Unexpected failure: Disabled test should not be run";
-}
-
-class SkippedTest : public Test {
-};
-
-TEST_F(SkippedTest, Skipped) {
-  GTEST_SKIP();
-}
-
-TEST(MixedResultTest, Succeeds) {
-  EXPECT_EQ(1, 1);
-  ASSERT_EQ(1, 1);
-}
-
-TEST(MixedResultTest, Fails) {
-  EXPECT_EQ(1, 2);
-  ASSERT_EQ(2, 3);
-}
-
-TEST(MixedResultTest, DISABLED_test) {
-  FAIL() << "Unexpected failure: Disabled test should not be run";
-}
-
-TEST(XmlQuotingTest, OutputsCData) {
-  FAIL() << "XML output: "
-            "<?xml encoding=\"utf-8\"><top><![CDATA[cdata text]]></top>";
-}
-
-// Helps to test that invalid characters produced by test code do not make
-// it into the XML file.
-TEST(InvalidCharactersTest, InvalidCharactersInMessage) {
-  FAIL() << "Invalid characters in brackets [\x1\x2]";
-}
-
-class PropertyRecordingTest : public Test {
- public:
-  static void SetUpTestSuite() { RecordProperty("SetUpTestSuite", "yes"); }
-  static void TearDownTestSuite() {
-    RecordProperty("TearDownTestSuite", "aye");
-  }
-};
-
-TEST_F(PropertyRecordingTest, OneProperty) {
-  RecordProperty("key_1", "1");
-}
-
-TEST_F(PropertyRecordingTest, IntValuedProperty) {
-  RecordProperty("key_int", 1);
-}
-
-TEST_F(PropertyRecordingTest, ThreeProperties) {
-  RecordProperty("key_1", "1");
-  RecordProperty("key_2", "2");
-  RecordProperty("key_3", "3");
-}
-
-TEST_F(PropertyRecordingTest, TwoValuesForOneKeyUsesLastValue) {
-  RecordProperty("key_1", "1");
-  RecordProperty("key_1", "2");
-}
-
-TEST(NoFixtureTest, RecordProperty) {
-  RecordProperty("key", "1");
-}
-
-void ExternalUtilityThatCallsRecordProperty(const std::string& key, int value) {
-  testing::Test::RecordProperty(key, value);
-}
-
-void ExternalUtilityThatCallsRecordProperty(const std::string& key,
-                                            const std::string& value) {
-  testing::Test::RecordProperty(key, value);
-}
-
-TEST(NoFixtureTest, ExternalUtilityThatCallsRecordIntValuedProperty) {
-  ExternalUtilityThatCallsRecordProperty("key_for_utility_int", 1);
-}
-
-TEST(NoFixtureTest, ExternalUtilityThatCallsRecordStringValuedProperty) {
-  ExternalUtilityThatCallsRecordProperty("key_for_utility_string", "1");
-}
-
-// Verifies that the test parameter value is output in the 'value_param'
-// XML attribute for value-parameterized tests.
-class ValueParamTest : public TestWithParam<int> {};
-TEST_P(ValueParamTest, HasValueParamAttribute) {}
-TEST_P(ValueParamTest, AnotherTestThatHasValueParamAttribute) {}
-INSTANTIATE_TEST_SUITE_P(Single, ValueParamTest, Values(33, 42));
-
-#if GTEST_HAS_TYPED_TEST
-// Verifies that the type parameter name is output in the 'type_param'
-// XML attribute for typed tests.
-template <typename T> class TypedTest : public Test {};
-typedef testing::Types<int, long> TypedTestTypes;
-TYPED_TEST_SUITE(TypedTest, TypedTestTypes);
-TYPED_TEST(TypedTest, HasTypeParamAttribute) {}
-#endif
-
-#if GTEST_HAS_TYPED_TEST_P
-// Verifies that the type parameter name is output in the 'type_param'
-// XML attribute for type-parameterized tests.
-template <typename T>
-class TypeParameterizedTestSuite : public Test {};
-TYPED_TEST_SUITE_P(TypeParameterizedTestSuite);
-TYPED_TEST_P(TypeParameterizedTestSuite, HasTypeParamAttribute) {}
-REGISTER_TYPED_TEST_SUITE_P(TypeParameterizedTestSuite, HasTypeParamAttribute);
-typedef testing::Types<int, long> TypeParameterizedTestSuiteTypes;  // NOLINT
-INSTANTIATE_TYPED_TEST_SUITE_P(Single, TypeParameterizedTestSuite,
-                               TypeParameterizedTestSuiteTypes);
-#endif
-
-int main(int argc, char** argv) {
-  InitGoogleTest(&argc, argv);
-
-  if (argc > 1 && strcmp(argv[1], "--shut_down_xml") == 0) {
-    TestEventListeners& listeners = UnitTest::GetInstance()->listeners();
-    delete listeners.Release(listeners.default_xml_generator());
-  }
-  testing::Test::RecordProperty("ad_hoc_property", "42");
-  return RUN_ALL_TESTS();
-}
diff --git a/3rdparty/gtest/test/gtest_xml_test_utils.py b/3rdparty/gtest/test/gtest_xml_test_utils.py
deleted file mode 100644
index 9914a49e..00000000
--- a/3rdparty/gtest/test/gtest_xml_test_utils.py
+++ /dev/null
@@ -1,196 +0,0 @@
-# Copyright 2006, Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-#     * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-#     * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""Unit test utilities for gtest_xml_output"""
-
-import re
-from xml.dom import minidom, Node
-import gtest_test_utils
-
-GTEST_DEFAULT_OUTPUT_FILE = 'test_detail.xml'
-
-class GTestXMLTestCase(gtest_test_utils.TestCase):
-  """
-  Base class for tests of Google Test's XML output functionality.
-  """
-
-
-  def AssertEquivalentNodes(self, expected_node, actual_node):
-    """
-    Asserts that actual_node (a DOM node object) is equivalent to
-    expected_node (another DOM node object), in that either both of
-    them are CDATA nodes and have the same value, or both are DOM
-    elements and actual_node meets all of the following conditions:
-
-    *  It has the same tag name as expected_node.
-    *  It has the same set of attributes as expected_node, each with
-       the same value as the corresponding attribute of expected_node.
-       Exceptions are any attribute named "time", which needs only be
-       convertible to a floating-point number and any attribute named
-       "type_param" which only has to be non-empty.
-    *  It has an equivalent set of child nodes (including elements and
-       CDATA sections) as expected_node.  Note that we ignore the
-       order of the children as they are not guaranteed to be in any
-       particular order.
-    """
-
-    if expected_node.nodeType == Node.CDATA_SECTION_NODE:
-      self.assertEquals(Node.CDATA_SECTION_NODE, actual_node.nodeType)
-      self.assertEquals(expected_node.nodeValue, actual_node.nodeValue)
-      return
-
-    self.assertEquals(Node.ELEMENT_NODE, actual_node.nodeType)
-    self.assertEquals(Node.ELEMENT_NODE, expected_node.nodeType)
-    self.assertEquals(expected_node.tagName, actual_node.tagName)
-
-    expected_attributes = expected_node.attributes
-    actual_attributes   = actual_node  .attributes
-    self.assertEquals(
-        expected_attributes.length, actual_attributes.length,
-        'attribute numbers differ in element %s:\nExpected: %r\nActual: %r' % (
-            actual_node.tagName, expected_attributes.keys(),
-            actual_attributes.keys()))
-    for i in range(expected_attributes.length):
-      expected_attr = expected_attributes.item(i)
-      actual_attr   = actual_attributes.get(expected_attr.name)
-      self.assert_(
-          actual_attr is not None,
-          'expected attribute %s not found in element %s' %
-          (expected_attr.name, actual_node.tagName))
-      self.assertEquals(
-          expected_attr.value, actual_attr.value,
-          ' values of attribute %s in element %s differ: %s vs %s' %
-          (expected_attr.name, actual_node.tagName,
-           expected_attr.value, actual_attr.value))
-
-    expected_children = self._GetChildren(expected_node)
-    actual_children = self._GetChildren(actual_node)
-    self.assertEquals(
-        len(expected_children), len(actual_children),
-        'number of child elements differ in element ' + actual_node.tagName)
-    for child_id, child in expected_children.items():
-      self.assert_(child_id in actual_children,
-                   '<%s> is not in <%s> (in element %s)' %
-                   (child_id, actual_children, actual_node.tagName))
-      self.AssertEquivalentNodes(child, actual_children[child_id])
-
-  identifying_attribute = {
-      'testsuites': 'name',
-      'testsuite': 'name',
-      'testcase': 'name',
-      'failure': 'message',
-      'property': 'name',
-  }
-
-  def _GetChildren(self, element):
-    """
-    Fetches all of the child nodes of element, a DOM Element object.
-    Returns them as the values of a dictionary keyed by the IDs of the
-    children.  For <testsuites>, <testsuite>, <testcase>, and <property>
-    elements, the ID is the value of their "name" attribute; for <failure>
-    elements, it is the value of the "message" attribute; for <properties>
-    elements, it is the value of their parent's "name" attribute plus the
-    literal string "properties"; CDATA sections and non-whitespace
-    text nodes are concatenated into a single CDATA section with ID
-    "detail".  An exception is raised if any element other than the above
-    four is encountered, if two child elements with the same identifying
-    attributes are encountered, or if any other type of node is encountered.
-    """
-
-    children = {}
-    for child in element.childNodes:
-      if child.nodeType == Node.ELEMENT_NODE:
-        if child.tagName == 'properties':
-          self.assert_(child.parentNode is not None,
-                       'Encountered <properties> element without a parent')
-          child_id = child.parentNode.getAttribute('name') + '-properties'
-        else:
-          self.assert_(child.tagName in self.identifying_attribute,
-                       'Encountered unknown element <%s>' % child.tagName)
-          child_id = child.getAttribute(
-              self.identifying_attribute[child.tagName])
-        self.assert_(child_id not in children)
-        children[child_id] = child
-      elif child.nodeType in [Node.TEXT_NODE, Node.CDATA_SECTION_NODE]:
-        if 'detail' not in children:
-          if (child.nodeType == Node.CDATA_SECTION_NODE or
-              not child.nodeValue.isspace()):
-            children['detail'] = child.ownerDocument.createCDATASection(
-                child.nodeValue)
-        else:
-          children['detail'].nodeValue += child.nodeValue
-      else:
-        self.fail('Encountered unexpected node type %d' % child.nodeType)
-    return children
-
-  def NormalizeXml(self, element):
-    """
-    Normalizes Google Test's XML output to eliminate references to transient
-    information that may change from run to run.
-
-    *  The "time" attribute of <testsuites>, <testsuite> and <testcase>
-       elements is replaced with a single asterisk, if it contains
-       only digit characters.
-    *  The "timestamp" attribute of <testsuites> elements is replaced with a
-       single asterisk, if it contains a valid ISO8601 datetime value.
-    *  The "type_param" attribute of <testcase> elements is replaced with a
-       single asterisk (if it sn non-empty) as it is the type name returned
-       by the compiler and is platform dependent.
-    *  The line info reported in the first line of the "message"
-       attribute and CDATA section of <failure> elements is replaced with the
-       file's basename and a single asterisk for the line number.
-    *  The directory names in file paths are removed.
-    *  The stack traces are removed.
-    """
-
-    if element.tagName in ('testsuites', 'testsuite', 'testcase'):
-      timestamp = element.getAttributeNode('timestamp')
-      timestamp.value = re.sub(r'^\d{4}-\d\d-\d\dT\d\d:\d\d:\d\d$',
-                               '*', timestamp.value)
-    if element.tagName in ('testsuites', 'testsuite', 'testcase'):
-      time = element.getAttributeNode('time')
-      time.value = re.sub(r'^\d+(\.\d+)?$', '*', time.value)
-      type_param = element.getAttributeNode('type_param')
-      if type_param and type_param.value:
-        type_param.value = '*'
-    elif element.tagName == 'failure':
-      source_line_pat = r'^.*[/\\](.*:)\d+\n'
-      # Replaces the source line information with a normalized form.
-      message = element.getAttributeNode('message')
-      message.value = re.sub(source_line_pat, '\\1*\n', message.value)
-      for child in element.childNodes:
-        if child.nodeType == Node.CDATA_SECTION_NODE:
-          # Replaces the source line information with a normalized form.
-          cdata = re.sub(source_line_pat, '\\1*\n', child.nodeValue)
-          # Removes the actual stack trace.
-          child.nodeValue = re.sub(r'Stack trace:\n(.|\n)*',
-                                   'Stack trace:\n*', cdata)
-    for child in element.childNodes:
-      if child.nodeType == Node.ELEMENT_NODE:
-        self.NormalizeXml(child)
diff --git a/3rdparty/gtest/test/production.cc b/3rdparty/gtest/test/production.cc
deleted file mode 100644
index 0f69f6db..00000000
--- a/3rdparty/gtest/test/production.cc
+++ /dev/null
@@ -1,35 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This is part of the unit test for gtest_prod.h.
-
-#include "production.h"
-
-PrivateCode::PrivateCode() : x_(0) {}
diff --git a/3rdparty/gtest/test/production.h b/3rdparty/gtest/test/production.h
deleted file mode 100644
index 542723b7..00000000
--- a/3rdparty/gtest/test/production.h
+++ /dev/null
@@ -1,54 +0,0 @@
-// Copyright 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-//
-// This is part of the unit test for gtest_prod.h.
-
-#ifndef GTEST_TEST_PRODUCTION_H_
-#define GTEST_TEST_PRODUCTION_H_
-
-#include "gtest/gtest_prod.h"
-
-class PrivateCode {
- public:
-  // Declares a friend test that does not use a fixture.
-  FRIEND_TEST(PrivateCodeTest, CanAccessPrivateMembers);
-
-  // Declares a friend test that uses a fixture.
-  FRIEND_TEST(PrivateCodeFixtureTest, CanAccessPrivateMembers);
-
-  PrivateCode();
-
-  int x() const { return x_; }
- private:
-  void set_x(int an_x) { x_ = an_x; }
-  int x_;
-};
-
-#endif  // GTEST_TEST_PRODUCTION_H_
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6d9b2a57..db65c02d 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,67 +1,84 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.13)
 project(cpp-ipc)
 
 option(LIBIPC_BUILD_TESTS       "Build all of libipc's own tests."                      OFF)
 option(LIBIPC_BUILD_DEMOS       "Build all of libipc's own demos."                      OFF)
+option(LIBIPC_BUILD_BENCHMARK   "Build all of libipc's own benchmark tests."            OFF)
 option(LIBIPC_BUILD_SHARED_LIBS "Build shared libraries (DLLs)."                        OFF)
 option(LIBIPC_USE_STATIC_CRT    "Set to ON to build with static CRT on Windows (/MT)."  OFF)
+option(LIBIPC_CODECOV           "Build with unit test coverage."                        OFF)
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 set(CMAKE_CXX_STANDARD 17)
-set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -DNDEBUG")
-if(NOT MSVC)
-    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O2")
-endif()
 
 if (MSVC)
-    set(CompilerFlags
-        CMAKE_CXX_FLAGS
-        CMAKE_CXX_FLAGS_DEBUG
-        CMAKE_CXX_FLAGS_RELEASE
-        CMAKE_C_FLAGS
-        CMAKE_C_FLAGS_DEBUG
-        CMAKE_C_FLAGS_RELEASE
-        )
-    if (LIBIPC_USE_STATIC_CRT)
-        foreach(CompilerFlag ${CompilerFlags})
-            string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
-            string(REPLACE "/MDd" "/MTd" ${CompilerFlag} "${${CompilerFlag}}")
-        endforeach()
-    else()
-        foreach(CompilerFlag ${CompilerFlags})
-            string(REPLACE "/MT" "/MD" ${CompilerFlag} "${${CompilerFlag}}")
-            string(REPLACE "/MTd" "/MDd" ${CompilerFlag} "${${CompilerFlag}}")
-        endforeach()
-    endif()
+  set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Zi")
+  set(CompilerFlags
+      CMAKE_CXX_FLAGS
+      CMAKE_CXX_FLAGS_DEBUG
+      CMAKE_CXX_FLAGS_RELEASE
+      CMAKE_C_FLAGS
+      CMAKE_C_FLAGS_DEBUG
+      CMAKE_C_FLAGS_RELEASE)
+  if (LIBIPC_USE_STATIC_CRT)
+      foreach(CompilerFlag ${CompilerFlags})
+        string(REPLACE "/MD" "/MT" ${CompilerFlag} "${${CompilerFlag}}")
+        string(REPLACE "/MDd" "/MTd" ${CompilerFlag} "${${CompilerFlag}}")
+      endforeach()
+  else()
+      foreach(CompilerFlag ${CompilerFlags})
+        string(REPLACE "/MT" "/MD" ${CompilerFlag} "${${CompilerFlag}}")
+        string(REPLACE "/MTd" "/MDd" ${CompilerFlag} "${${CompilerFlag}}")
+      endforeach()
+  endif()
+else()
+  add_compile_options(
+    "$<$<BOOL:${LIBIPC_CODECOV}>:SHELL:--coverage>"
+    "$<$<CONFIG:Release>:SHELL:-DNDEBUG -O2>"
+    "$<$<CONFIG:Debug>:SHELL:-g -rdynamic -fsanitize=address>"
+    )
+  add_link_options(
+    "$<$<BOOL:${LIBIPC_CODECOV}>:SHELL:-lgcov --coverage>"
+    "$<$<CONFIG:Debug>:SHELL:-fsanitize=address>"
+    )
 endif()
 
 set(LIBRARY_OUTPUT_PATH    ${CMAKE_BINARY_DIR}/bin)
 set(EXECUTABLE_OUTPUT_PATH ${CMAKE_BINARY_DIR}/bin)
 set(LIBIPC_PROJECT_DIR     ${PROJECT_SOURCE_DIR})
 
+# FetchContent Support
+include(FetchContent)
+if(${CMAKE_VERSION} VERSION_LESS 3.14)
+  macro(FetchContent_MakeAvailable NAME)
+    FetchContent_GetProperties(${NAME})
+    if(NOT ${NAME}_POPULATED)
+      FetchContent_Populate(${NAME})
+      add_subdirectory(${${NAME}_SOURCE_DIR} ${${NAME}_BINARY_DIR})
+    endif()
+  endmacro()
+endif()
+
 # Unicode Support
 add_definitions(-DUNICODE -D_UNICODE)
 
 add_subdirectory(src)
 
 if (LIBIPC_BUILD_TESTS)
-    set(GOOGLETEST_VERSION 1.10.0)
-    if (LIBIPC_USE_STATIC_CRT)
-        set(gtest_force_shared_crt OFF)
-    else()
-        set(gtest_force_shared_crt ON)
-    endif()
-    add_subdirectory(3rdparty/gtest)
-    add_subdirectory(test)
+  add_subdirectory(test)
 endif()
 
-if (LIBIPC_BUILD_DEMOS)
-    add_subdirectory(demo/chat)
-    add_subdirectory(demo/msg_que)
-    add_subdirectory(demo/send_recv)
+# if (LIBIPC_BUILD_DEMOS)
+#   add_subdirectory(demo/chat)
+#   add_subdirectory(demo/msg_que)
+#   add_subdirectory(demo/send_recv)
+# endif()
+
+if (LIBIPC_BUILD_BENCHMARK)
+  add_subdirectory(benchmark)
 endif()
 
 install(
-    DIRECTORY "include/"
-    DESTINATION "include"
-)
+  DIRECTORY "include/"
+  DESTINATION "include"
+  )
diff --git a/README.md b/README.md
index eeb7f2f4..8ee59ed9 100755
--- a/README.md
+++ b/README.md
@@ -1,43 +1,35 @@
 # cpp-ipc(libipc) - C++ IPC Library
 
-[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/mutouyun/cpp-ipc/blob/master/LICENSE) 
+[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/mutouyun/cpp-ipc/blob/master/LICENSE)
 [![Build Status](https://github.com/mutouyun/cpp-ipc/actions/workflows/c-cpp.yml/badge.svg)](https://github.com/mutouyun/cpp-ipc/actions)
-[![Build status](https://ci.appveyor.com/api/projects/status/github/mutouyun/cpp-ipc?branch=master&svg=true)](https://ci.appveyor.com/project/mutouyun/cpp-ipc)
+[![CodeCov](https://codecov.io/github/mutouyun/cpp-ipc/graph/badge.svg?token=MNOAOLNELH)](https://codecov.io/github/mutouyun/cpp-ipc)
 [![Vcpkg package](https://img.shields.io/badge/Vcpkg-package-blueviolet)](https://github.com/microsoft/vcpkg/tree/master/ports/cpp-ipc)
  
 A high-performance inter-process communication using shared memory on Linux/Windows.  
 使用共享内存的跨平台（Linux/Windows，x86/x64/ARM）高性能IPC通讯库。
- 
- * 推荐支持C++17的编译器（msvc-2017/gcc-7/clang-4）
- * 除STL外，无其他依赖
- * 无锁（lock-free）或轻量级spin-lock
- * 底层数据结构为循环数组（circular array）
- * `ipc::route`支持单写多读，`ipc::channel`支持多写多读【**注意：目前同一条通道最多支持32个receiver，sender无限制**】
- * 默认采用广播模式收发数据，支持用户任意选择读写方案
- * 不会长时间忙等（重试一定次数后会使用信号量进行等待），支持超时
- * 支持[Vcpkg](https://github.com/microsoft/vcpkg/blob/master/README_zh_CN.md)方式安装，如`vcpkg install cpp-ipc`
- 
-## Usage
-
-See: [Wiki](https://github.com/mutouyun/cpp-ipc/wiki)
-
-## Performance
-
- Environment | Value
- ------ | ------
- Device | Lenovo ThinkPad T450
- CPU | Intel® Core™ i5-4300U @ 2.5 GHz
- RAM | 16 GB
- OS | Windows 7 Ultimate x64
- Compiler | MSVC 2017 15.9.4
 
-UT & benchmark test function: [test](test)  
-Performance data: [performance.xlsx](performance.xlsx)
+---
 
-## Reference
+* 【**重构中……**】
 
- * [Lock-Free Data Structures | Dr Dobb's](http://www.drdobbs.com/lock-free-data-structures/184401865)
- * [Yet another implementation of a lock-free circular array queue | CodeProject](https://www.codeproject.com/Articles/153898/Yet-another-implementation-of-a-lock-free-circular)
- * [Lock-Free 编程 | 匠心十年 - 博客园](http://www.cnblogs.com/gaochundong/p/lock_free_programming.html)
- * [无锁队列的实现 | 酷 壳 - CoolShell](https://coolshell.cn/articles/8239.html)
- * [Implementing Condition Variables with Semaphores](https://www.microsoft.com/en-us/research/wp-content/uploads/2004/12/ImplementingCVs.pdf)
+- [ ] 重构代码结构：
+    - [x] imp - 基础库
+    - [x] pmr - 内存管理
+    - [x] concur - 并发
+    - [ ] sock - 简单的 socket 抽象
+    - [ ] te - 类型擦除
+- [ ] IPC：实现基本组件
+    - [x] 共享内存（需要作为后续组件的基础）
+    - [x] 原子锁
+    - [ ] 互斥量
+    - [ ] 条件变量
+    - [ ] 信号量
+    - [ ] 事件（支持 I/O 多路复用）
+- [ ] IPC：实现主体功能
+    - [ ] 基于共享内存的变长循环内存池（作为大对象的底层存储）
+    - [ ] 节点间的相互发现机制（基于 sock，避免连接）
+    - [ ] 实现单对单、单对多、多对多收发模型
+- [ ] IPC：API/性能优化
+    - [ ] 支持零拷贝发送
+    - [ ] 支持多路读取等待
+    - [ ] 优化无锁队列实现
\ No newline at end of file
diff --git a/benchmark/CMakeLists.txt b/benchmark/CMakeLists.txt
new file mode 100644
index 00000000..50b2119d
--- /dev/null
+++ b/benchmark/CMakeLists.txt
@@ -0,0 +1,40 @@
+project(benchmark-ipc)
+
+if(NOT MSVC)
+  add_compile_options(
+    -Wno-attributes 
+    -Wno-missing-field-initializers 
+    -Wno-unused-variable 
+    -Wno-unused-function)
+else()
+  add_definitions(-D_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING)
+endif()
+
+FetchContent_Declare(googlebenchmark
+  GIT_REPOSITORY https://github.com/google/benchmark.git
+  GIT_TAG        v1.7.0
+)
+set(BENCHMARK_ENABLE_TESTING OFF CACHE BOOL "" FORCE)
+set(BENCHMARK_ENABLE_INSTALL OFF CACHE BOOL "" FORCE)
+add_definitions(-DBENCHMARK_STATIC_DEFINE)
+FetchContent_MakeAvailable(googlebenchmark)
+
+FetchContent_Declare(fmtlib
+  GIT_REPOSITORY https://github.com/fmtlib/fmt.git
+  GIT_TAG        9.1.0
+)
+FetchContent_MakeAvailable(fmtlib)
+
+include_directories(
+  ${LIBIPC_PROJECT_DIR}/include 
+  ${LIBIPC_PROJECT_DIR}/src
+  ${LIBIPC_PROJECT_DIR}/test)
+
+file(GLOB SRC_FILES  ${LIBIPC_PROJECT_DIR}/benchmark/*.cpp)
+file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/benchmark/*.h)
+
+add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
+
+target_link_libraries(${PROJECT_NAME}
+  benchmark_main fmt
+  imp pmr ipc)
diff --git a/benchmark/benchmark_concur.cpp b/benchmark/benchmark_concur.cpp
new file mode 100644
index 00000000..dc388337
--- /dev/null
+++ b/benchmark/benchmark_concur.cpp
@@ -0,0 +1,91 @@
+
+#include <thread>
+#include <future>
+#include <atomic>
+#include <vector>
+#include <tuple>
+
+#include "benchmark/benchmark.h"
+
+#include "libconcur/circular_queue.h"
+
+namespace {
+
+void concur_queue_rtt(benchmark::State &state) {
+  using namespace concur;
+  circular_queue<std::int64_t, relation::single, relation::single> que [2];
+  std::atomic_bool stop = false;
+  auto producer = std::async(std::launch::async, [&stop, &que] {
+    for (std::int64_t i = 0; !stop.load(std::memory_order_relaxed); ++i) {
+      std::int64_t n {};
+      while (!que[0].pop(n)) ;
+      std::ignore = que[1].push(i);
+    }
+  });
+
+  for (auto _ : state) {
+    std::ignore = que[0].push(0);
+    std::int64_t n {};
+    while (!que[1].pop(n)) ;
+  }
+
+  stop = true;
+  std::ignore = que[0].push(0);
+  producer.wait();
+}
+
+void concur_queue_1v1(benchmark::State &state) {
+  using namespace concur;
+  circular_queue<std::int64_t, relation::single, relation::single> que;
+  std::atomic_bool stop = false;
+  auto producer = std::async(std::launch::async, [&stop, &que] {
+    for (std::int64_t i = 0; !stop.load(std::memory_order_relaxed); ++i) {
+      std::ignore = que.push(i);
+      std::this_thread::yield();
+    }
+  });
+
+  for (auto _ : state) {
+    std::int64_t i;
+    while (!que.pop(i)) std::this_thread::yield();
+  }
+
+  stop = true;
+  producer.wait();
+}
+
+void concur_queue_NvN(benchmark::State &state) {
+  using namespace concur;
+
+  static circular_queue<std::int64_t, relation::multi, relation::multi> que;
+  static std::atomic_int run = 0;
+  static std::vector<std::thread> prods;
+
+  if (state.thread_index() == 0) {
+    run = state.threads();
+    prods.resize(state.threads());
+    auto producer = [] {
+      for (std::int64_t i = 0; run.load(std::memory_order_relaxed) > 0; ++i) {
+        std::ignore = que.push(i);
+        std::this_thread::yield();
+      }
+    };
+    for (auto &p : prods) p = std::thread(producer);
+  }
+
+  for (auto _ : state) {
+    std::int64_t i;
+    while (!que.pop(i)) std::this_thread::yield();
+  }
+  run -= 1;
+
+  if (state.thread_index() == 0) {
+    for (auto &p : prods) p.join();
+  }
+}
+
+} // namespace
+
+BENCHMARK(concur_queue_rtt);
+BENCHMARK(concur_queue_1v1);
+BENCHMARK(concur_queue_NvN)->ThreadRange(1, 16);
diff --git a/benchmark/benchmark_fmt.cpp b/benchmark/benchmark_fmt.cpp
new file mode 100644
index 00000000..186bae27
--- /dev/null
+++ b/benchmark/benchmark_fmt.cpp
@@ -0,0 +1,116 @@
+#include <tuple>
+
+#include "benchmark/benchmark.h"
+
+#include "fmt/format.h"
+#include "fmt/chrono.h"
+
+#include "libimp/fmt.h"
+
+namespace {
+
+void imp_fmt_string(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt("hello world.hello world.hello world.hello world.hello world.");
+  }
+}
+
+void imp_multi_fmt_string(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt("hello world.", "hello world.", "hello world.", "hello world.", "hello world.");
+  }
+}
+
+void fmt_fmt_string(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("hello world.hello world.hello world.hello world.hello world.");
+  }
+}
+
+void fmt_multi_fmt_string(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}{}{}{}{}", 
+                              "hello world.", " hello world.", " hello world.", " hello world.", " hello world.");
+  }
+}
+
+void imp_fmt_int(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt(654321);
+  }
+}
+
+void imp_multi_fmt_int(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt(654321, 654321, 654321, 654321, 654321);
+  }
+}
+
+void fmt_fmt_int(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}", 654321);
+  }
+}
+
+void fmt_multi_fmt_int(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}{}{}{}{}", 654321, 654321, 654321, 654321, 654321);
+  }
+}
+
+void imp_fmt_float(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt(654.321);
+  }
+}
+
+void imp_multi_fmt_float(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = imp::fmt(654.321, 654.321, 654.321, 654.321, 654.321);
+  }
+}
+
+void fmt_fmt_float(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}", 654.321);
+  }
+}
+
+void fmt_multi_fmt_float(benchmark::State &state) {
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}{}{}{}{}", 654.321, 654.321, 654.321, 654.321, 654.321);
+  }
+}
+
+void imp_fmt_chrono(benchmark::State &state) {
+  auto now = std::chrono::system_clock::now();
+  for (auto _ : state) {
+    std::ignore = imp::fmt(now);
+  }
+}
+
+void fmt_fmt_chrono(benchmark::State &state) {
+  auto now = std::chrono::system_clock::now();
+  for (auto _ : state) {
+    std::ignore = fmt::format("{}", now);
+  }
+}
+
+} // namespace
+
+BENCHMARK(imp_fmt_string);
+BENCHMARK(fmt_fmt_string);
+BENCHMARK(imp_fmt_int);
+BENCHMARK(fmt_fmt_int);
+BENCHMARK(imp_fmt_float);
+BENCHMARK(fmt_fmt_float);
+
+BENCHMARK(imp_multi_fmt_string);
+BENCHMARK(fmt_multi_fmt_string);
+BENCHMARK(imp_multi_fmt_int);
+BENCHMARK(fmt_multi_fmt_int);
+BENCHMARK(imp_multi_fmt_float);
+BENCHMARK(fmt_multi_fmt_float);
+
+BENCHMARK(imp_fmt_chrono);
+BENCHMARK(fmt_fmt_chrono);
diff --git a/benchmark/benchmark_ipc.cpp b/benchmark/benchmark_ipc.cpp
new file mode 100644
index 00000000..0c2b649a
--- /dev/null
+++ b/benchmark/benchmark_ipc.cpp
@@ -0,0 +1,437 @@
+#include <libimp/detect_plat.h>
+#if defined(LIBIMP_OS_LINUX)
+
+#include <sys/eventfd.h>
+#include <sys/syscall.h>
+#include <sys/stat.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/types.h>
+#include <sys/inotify.h>
+#include <netinet/in.h>
+#include <errno.h>
+
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <mqueue.h>
+#include <stdio.h>
+
+#include <atomic>
+
+#include "benchmark/benchmark.h"
+
+#include "test_util.h"
+
+#include <libipc/shm.h>
+
+namespace {
+
+using flag_t = std::atomic_bool;
+
+struct eventfd_reader {
+  pid_t pid_ {-1};
+  int   rfd_ {eventfd(0, 0/*EFD_CLOEXEC*/)};
+  int   wfd_ {eventfd(0, 0/*EFD_CLOEXEC*/)};
+
+  eventfd_reader() {
+    auto shm = ipc::shared_memory("shm-eventfd_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-eventfd_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("eventfd_reader rfd = %d, wfd = %d\n", rfd_, wfd_);
+      while (!flag->load(std::memory_order_relaxed)) {
+        uint64_t n = 0;
+        read(wfd_, &n, sizeof(uint64_t));
+        n = 1;
+        write(rfd_, &n, sizeof(uint64_t));
+      }
+      printf("eventfd_reader exit.\n");
+    });
+  }
+
+  ~eventfd_reader() {
+    auto shm = ipc::shared_memory("shm-eventfd_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    uint64_t n = 1;
+    write(wfd_, &n, sizeof(uint64_t));
+    test::join_subproc(pid_);
+    close(rfd_);
+    close(wfd_);
+  }
+} evtfd_r__;
+
+struct mqueue_reader {
+  pid_t pid_ {-1};
+
+  mqueue_reader() {
+    auto shm = ipc::shared_memory("shm-mqueue_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-mqueue_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("mqueue_reader start.\n");
+      mq_unlink("/mqueue-wfd");
+      mq_unlink("/mqueue-rfd");
+      struct mq_attr attr = {0, 10, 1, 0};
+      mqd_t wfd = mq_open("/mqueue-wfd", O_CREAT | O_RDONLY, 0666, &attr);
+      mqd_t rfd = mq_open("/mqueue-rfd", O_CREAT | O_WRONLY, 0666, &attr);
+      if (wfd < 0 || rfd < 0) {
+        printf("mq_open error. errno = %d\n", errno);
+        return;
+      }
+      while (!flag->load(std::memory_order_relaxed)) {
+        char n {};
+        // read
+        if (mq_receive(wfd, &n, sizeof(n), nullptr) < 0) {
+          printf("mq_receive error. errno = %d\n", errno);
+          return;
+        }
+        // write
+        if (mq_send(rfd, &n, sizeof(n), 0) < 0) {
+          printf("mq_send error. errno = %d\n", errno);
+          return;
+        }
+      }
+      printf("mqueue_reader exit.\n");
+      mq_close(wfd);
+      mq_close(rfd);
+    });
+  }
+
+  ~mqueue_reader() {
+    auto shm = ipc::shared_memory("shm-mqueue_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    {
+      mqd_t wfd = mq_open("/mqueue-wfd", O_EXCL | O_WRONLY, 0666, NULL);
+      if (wfd < 0) {
+        printf("mq_open error. errno = %d\n", errno);
+        return;
+      }
+      char n {};
+      if (mq_send(wfd, &n, sizeof(n), 0) < 0) {
+        printf("mq_send error. errno = %d\n", errno);
+        return;
+      }
+      mq_close(wfd);
+    }
+    test::join_subproc(pid_);
+  }
+} mq_r__;
+
+struct pipe_reader {
+  pid_t pid_ {-1};
+
+  pipe_reader() {
+    auto shm = ipc::shared_memory("shm-pipe_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-pipe_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("pipe_reader start.\n");
+      mkfifo("/tmp/shm-pipe.w", S_IFIFO|0666);
+      mkfifo("/tmp/shm-pipe.r", S_IFIFO|0666);
+      int wfd = open("/tmp/shm-pipe.w", O_RDWR);
+      int rfd = open("/tmp/shm-pipe.r", O_RDWR);
+      while (!flag->load(std::memory_order_relaxed)) {
+        char n {};
+        // read
+        read(wfd, &n, sizeof(n));
+        // write
+        write(rfd, &n, sizeof(n));
+      }
+      printf("pipe_reader exit.\n");
+      close(wfd);
+      close(rfd);
+    });
+  }
+
+  ~pipe_reader() {
+    auto shm = ipc::shared_memory("shm-pipe_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    {
+      mqd_t wfd = open("/tmp/shm-pipe.w", O_WRONLY);
+      char n {};
+      write(wfd, &n, sizeof(n));
+      close(wfd);
+    }
+    test::join_subproc(pid_);
+  }
+} pipe_r__;
+
+struct sock_reader {
+  pid_t pid_ {-1};
+
+  sock_reader() {
+    auto shm = ipc::shared_memory("shm-sock_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-sock_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("sock_reader start.\n");
+      int lfd = socket(AF_UNIX, SOCK_STREAM, 0);
+      struct sockaddr_un serun {};
+      serun.sun_family = AF_UNIX;
+      strcpy(serun.sun_path, "shm-sock.ser");
+      unlink(serun.sun_path);
+      bind(lfd, (struct sockaddr *)&serun, offsetof(struct sockaddr_un, sun_path) + strlen(serun.sun_path));
+      listen(lfd, 16);
+      while (!flag->load(std::memory_order_relaxed)) {
+        struct sockaddr_un cliun {};
+        socklen_t cliun_len = sizeof(cliun);
+        int cfd = accept(lfd, (struct sockaddr *)&cliun, &cliun_len);
+        if (cfd < 0) {
+          printf("accept error.\n");
+          continue;
+        }
+        while (!flag->load(std::memory_order_relaxed)) {
+          char c {};
+          auto r = read(cfd, &c, sizeof(c));
+          if (r <= 0) break;
+          write(cfd, &c, sizeof(c));
+        }
+        close(cfd);
+      }
+      printf("sock_reader exit.\n");
+    });
+  }
+
+  ~sock_reader() {
+    auto shm = ipc::shared_memory("shm-sock_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    {
+      auto sfd = start_client();
+      char c {};
+      write(sfd, &c, sizeof(c));
+      close(sfd);
+    }
+    test::join_subproc(pid_);
+  }
+
+  int start_client() {
+    int sfd = socket(AF_UNIX, SOCK_STREAM, 0);
+    struct sockaddr_un cliun {};
+    cliun.sun_family = AF_UNIX;
+    strcpy(cliun.sun_path, "shm-sock.cli");
+    unlink(cliun.sun_path);
+    bind(sfd, (struct sockaddr *)&cliun, offsetof(struct sockaddr_un, sun_path) + strlen(cliun.sun_path));
+    struct sockaddr_un serun {};
+    serun.sun_family = AF_UNIX;
+    strcpy(serun.sun_path, "shm-sock.ser");
+    connect(sfd, (struct sockaddr *)&serun, offsetof(struct sockaddr_un, sun_path) + strlen(serun.sun_path));
+    return sfd;
+  }
+} sock_r__;
+
+struct udp_reader {
+  pid_t pid_ {-1};
+
+  udp_reader() {
+    auto shm = ipc::shared_memory("shm-udp_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+
+    pid_ = test::subproc([this] {
+      auto shm = ipc::shared_memory("shm-udp_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      printf("udp_reader start.\n");
+      int lfd = socket(AF_INET, SOCK_DGRAM, 0);
+      struct sockaddr_in ser {};
+      ser.sin_family = AF_INET;
+      ser.sin_addr.s_addr = htonl(INADDR_ANY);
+      ser.sin_port = htons(8888);
+      bind(lfd, (struct sockaddr *)&ser, sizeof(ser));
+      while (!flag->load(std::memory_order_relaxed)) {
+        struct sockaddr_in cli {};
+        socklen_t cli_len = sizeof(cli);
+        char c {};
+        recvfrom(lfd, &c, sizeof(c), 0, (struct sockaddr *)&cli, &cli_len);
+        sendto(lfd, &c, sizeof(c), 0, (struct sockaddr *)&cli, cli_len);
+      }
+      printf("udp_reader exit.\n");
+    });
+  }
+
+  ~udp_reader() {
+    auto shm = ipc::shared_memory("shm-udp_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    {
+      auto sfd = socket(AF_INET, SOCK_DGRAM, 0);
+      struct sockaddr_in ser {};
+      ser.sin_family = AF_INET;
+      ser.sin_addr.s_addr = htonl(INADDR_ANY);
+      ser.sin_port = htons(8888);
+      char c {};
+      sendto(sfd, &c, sizeof(c), 0, (struct sockaddr *)&ser, sizeof(ser));
+      close(sfd);
+    }
+    test::join_subproc(pid_);
+  }
+} udp_r__;
+
+struct inotify_reader {
+  pid_t pid_ {-1};
+
+  inotify_reader() {
+    auto shm = ipc::shared_memory("shm-inotify_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(false, std::memory_order_relaxed);
+    fclose(fopen("/tmp/shm-inotify.0", "w"));
+    fclose(fopen("/tmp/shm-inotify.1", "w"));
+    pid_ = test::subproc([this] {
+      auto shm  = ipc::shared_memory("shm-inotify_reader", sizeof(flag_t));
+      auto flag = shm.as<flag_t>();
+      auto shm_rt = ipc::shared_memory("shm-inotify_reader.0", sizeof(flag_t));
+      auto shm_wt = ipc::shared_memory("shm-inotify_reader.1", sizeof(flag_t));
+      auto f_rt = shm_rt.as<flag_t>();
+      auto f_wt = shm_wt.as<flag_t>();
+      int ifd = inotify_init();
+      int iwd = inotify_add_watch(ifd, "/tmp/shm-inotify.0", IN_OPEN | IN_CLOSE);
+      // auto wf = fopen("/tmp/shm-inotify.1", "w");
+      printf("inotify_reader start.\n");
+      while (!flag->load(std::memory_order_relaxed)) {
+        // read
+        if (!f_rt->exchange(false, std::memory_order_acquire)) {
+          struct inotify_event e {};
+          read(ifd, &e, sizeof(e));
+        }
+        // write
+        f_wt->store(true, std::memory_order_release);
+        fclose(fopen("/tmp/shm-inotify.1", "r"));
+        // char c {'A'};
+        // fwrite(&c, 1, 1, wf);
+        // fflush(wf);
+      }
+      // fclose(wf);
+      inotify_rm_watch(ifd, iwd);
+      close(ifd);
+      printf("inotify_reader exit.\n");
+    });
+  }
+
+  ~inotify_reader() {
+    auto shm = ipc::shared_memory("shm-inotify_reader", sizeof(flag_t));
+    shm.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    auto shm_rt = ipc::shared_memory("shm-inotify_reader.0", sizeof(flag_t));
+    shm_rt.as<flag_t>()->store(true, std::memory_order_seq_cst);
+    fclose(fopen("/tmp/shm-inotify.0", "r"));
+    // auto rf = fopen("/tmp/shm-inotify.0", "w");
+    // char c {'A'};
+    // fwrite(&c, 1, 1, rf);
+    // fflush(rf);
+    // fclose(rf);
+    test::join_subproc(pid_);
+  }
+} inotify_r__;
+
+void ipc_eventfd_rtt(benchmark::State &state) {
+  for (auto _ : state) {
+    uint64_t n = 1;
+    write(evtfd_r__.wfd_, &n, sizeof(n));
+    read (evtfd_r__.rfd_, &n, sizeof(n));
+  }
+}
+
+void ipc_mqueue_rtt(benchmark::State &state) {
+  mqd_t wfd = mq_open("/mqueue-wfd", O_EXCL | O_WRONLY, 0666, NULL);
+  mqd_t rfd = mq_open("/mqueue-rfd", O_EXCL | O_RDONLY, 0666, NULL);
+  if (wfd < 0 || rfd < 0) {
+    printf("mq_open error. errno = %d\n", errno);
+    return;
+  }
+  for (auto _ : state) {
+    char n {};
+    // write
+    if (mq_send(wfd, &n, sizeof(n), 0) < 0) {
+      printf("mq_send error. errno = %d\n", errno);
+      return;
+    }
+    // read
+    if (mq_receive(rfd, &n, sizeof(n), nullptr) < 0) {
+      printf("mq_receive error. errno = %d\n", errno);
+      return;
+    }
+  }
+  mq_close(wfd);
+  mq_close(rfd);
+}
+
+void ipc_npipe_rtt(benchmark::State &state) {
+  int wfd = open("/tmp/shm-pipe.w", O_WRONLY);
+  int rfd = open("/tmp/shm-pipe.r", O_RDONLY);
+  for (auto _ : state) {
+    char n {};
+    // write
+    write(wfd, &n, sizeof(n));
+    // read
+    read(rfd, &n, sizeof(n));
+  }
+  close(wfd);
+  close(rfd);
+}
+
+void ipc_sock_rtt(benchmark::State &state) {
+  auto sfd = sock_r__.start_client();
+  for (auto _ : state) {
+    char n {};
+    write(sfd, &n, sizeof(n));
+    read (sfd, &n, sizeof(n));
+  }
+  close(sfd);
+}
+
+void ipc_udp_rtt(benchmark::State &state) {
+  auto sfd = socket(AF_INET, SOCK_DGRAM, 0);
+  struct sockaddr_in ser {};
+  ser.sin_family = AF_INET;
+  ser.sin_addr.s_addr = htonl(INADDR_ANY);
+  ser.sin_port = htons(8888);
+  for (auto _ : state) {
+    char n {'A'};
+    // write
+    sendto(sfd, &n, sizeof(n), 0, (struct sockaddr *)&ser, sizeof(ser));
+    // read
+    struct sockaddr_in cli {};
+    socklen_t len = sizeof(cli);
+    recvfrom(sfd, &n, sizeof(n), 0, (struct sockaddr *)&cli, &len);
+  }
+  close(sfd);
+}
+
+void ipc_inotify_rtt(benchmark::State &state) {
+  auto shm_rt = ipc::shared_memory("shm-inotify_reader.0", sizeof(flag_t));
+  auto shm_wt = ipc::shared_memory("shm-inotify_reader.1", sizeof(flag_t));
+  auto f_rt = shm_rt.as<flag_t>();
+  auto f_wt = shm_wt.as<flag_t>();
+  int ifd = inotify_init();
+  int iwd = inotify_add_watch(ifd, "/tmp/shm-inotify.1", IN_OPEN | IN_CLOSE);
+  // auto rf = fopen("/tmp/shm-inotify.0", "w");
+  for (auto _ : state) {
+    // write
+    f_rt->store(true, std::memory_order_release);
+    fclose(fopen("/tmp/shm-inotify.0", "r"));
+    // char c {'A'};
+    // fwrite(&c, 1, 1, rf);
+    // fflush(rf);
+    // read
+    if (!f_wt->exchange(false, std::memory_order_acquire)) {
+      struct inotify_event e {};
+      read(ifd, &e, sizeof(e));
+    }
+  }
+  // fclose(rf);
+  inotify_rm_watch(ifd, iwd);
+  close(ifd);
+}
+
+} // namespace
+
+BENCHMARK(ipc_eventfd_rtt);
+BENCHMARK(ipc_mqueue_rtt);
+BENCHMARK(ipc_npipe_rtt);
+BENCHMARK(ipc_sock_rtt);
+BENCHMARK(ipc_udp_rtt);
+BENCHMARK(ipc_inotify_rtt);
+#endif
\ No newline at end of file
diff --git a/benchmark/benchmark_log.cpp b/benchmark/benchmark_log.cpp
new file mode 100644
index 00000000..87f918cb
--- /dev/null
+++ b/benchmark/benchmark_log.cpp
@@ -0,0 +1,25 @@
+
+#include "benchmark/benchmark.h"
+
+#include "libimp/log.h"
+
+namespace {
+
+void imp_log_no_output(benchmark::State &state) {
+  LIBIMP_LOG_([](auto &&) {});
+  for (auto _ : state) {
+    log.debug("hello log.");
+  }
+}
+
+void imp_log_info(benchmark::State &state) {
+  LIBIMP_LOG_([](auto &&) {});
+  for (auto _ : state) {
+    log.info("hello log.");
+  }
+}
+
+} // namespace
+
+BENCHMARK(imp_log_no_output);
+BENCHMARK(imp_log_info);
\ No newline at end of file
diff --git a/benchmark/benchmark_new.cpp b/benchmark/benchmark_new.cpp
new file mode 100644
index 00000000..edef459e
--- /dev/null
+++ b/benchmark/benchmark_new.cpp
@@ -0,0 +1,325 @@
+
+#include <array>
+#include <cstdlib>
+#include <cstddef>
+
+#include "benchmark/benchmark.h"
+
+#include "libpmr/new.h"
+
+namespace {
+
+template <typename T, std::size_t N>
+class cache {
+public:
+  template <typename U>
+  void push(U &&u) noexcept {
+    data_[idx_++] = std::forward<U>(u);
+  }
+
+  T &pop() noexcept {
+    return data_[--idx_];
+  }
+
+  bool at_begin() const noexcept {
+    return idx_ == 0;
+  }
+
+  bool at_end() const noexcept {
+    return idx_ == N;
+  }
+
+private:
+  std::array<T, N> data_{};
+  std::size_t idx_{};
+};
+
+template <typename P, std::size_t CacheSize = 128>
+class test_suit {
+  void next(std::size_t &idx) noexcept {
+    idx = (idx + 1) % 3;
+  }
+
+public:
+  ~test_suit() noexcept {
+    for (auto &pts : pts_) {
+      while (!pts.at_begin()) {
+        P::deallocate(pts.pop());
+      }
+    }
+  }
+
+  bool test_allocate() noexcept {
+    auto &pts = pts_[idx_a_];
+    pts.push(P::allocate());
+    if (pts.at_end()) {
+      next(idx_a_);
+      idx_d_ = idx_a_;
+    }
+    return ++allocated_ < CacheSize;
+  }
+
+  bool test_deallocate() noexcept {
+    auto &pts = pts_[idx_d_];
+    if (pts.at_begin()) {
+      next(idx_d_);
+      if (allocated_ == CacheSize) {
+        allocated_ = CacheSize / 2;
+        return true;
+      }
+      return allocated_ > 0;
+    }
+    P::deallocate(pts.pop());
+    --allocated_;
+    return true;
+  }
+
+private:
+  cache<void *, CacheSize / 2> pts_[3];
+  std::size_t idx_a_{};
+  std::size_t idx_d_{};
+  std::size_t allocated_{};
+};
+
+template <std::size_t AllocSize>
+struct policy_malloc {
+  static void *allocate() noexcept {
+    return std::malloc(AllocSize);
+  }
+
+  static void deallocate(void *p) noexcept {
+    std::free(p);
+  }
+};
+
+template <std::size_t AllocSize>
+struct policy_cpp_new {
+  static void *allocate() noexcept {
+    return new char[AllocSize];
+  }
+
+  static void deallocate(void *p) noexcept {
+    delete[] static_cast<char *>(p);
+  }
+};
+
+template <std::size_t AllocSize>
+struct policy_pmr_new {
+  static void *allocate() noexcept {
+    return pmr::$new<std::array<char, AllocSize>>();
+  }
+
+  static void deallocate(void *p) noexcept {
+    pmr::$delete(static_cast<std::array<char, AllocSize> *>(p));
+  }
+};
+
+template <template <std::size_t> class P, std::size_t AllocSize>
+void pmr_allocate(benchmark::State &state) {
+  test_suit<P<AllocSize>> suit;
+  for (auto _ : state) {
+    if (suit.test_allocate()) continue;
+    state.PauseTiming();
+    while (suit.test_deallocate()) ;
+    state.ResumeTiming();
+  }
+}
+
+template <template <std::size_t> class P, std::size_t AllocSize>
+void pmr_deallocate(benchmark::State &state) {
+  test_suit<P<AllocSize>> suit;
+  for (auto _ : state) {
+    if (suit.test_deallocate()) continue;
+    state.PauseTiming();
+    while (suit.test_allocate()) ;
+    state.ResumeTiming();
+  }
+}
+
+} // namespace
+
+BENCHMARK(pmr_allocate<policy_malloc, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_malloc, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_malloc, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_malloc, 1024>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_malloc, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_malloc, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_malloc, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_malloc, 1024>)->ThreadRange(1, 16);
+
+BENCHMARK(pmr_allocate<policy_cpp_new, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_cpp_new, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_cpp_new, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_cpp_new, 1024>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_cpp_new, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_cpp_new, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_cpp_new, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_cpp_new, 1024>)->ThreadRange(1, 16);
+
+BENCHMARK(pmr_allocate<policy_pmr_new, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_pmr_new, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_pmr_new, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_allocate<policy_pmr_new, 1024>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_pmr_new, 8>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_pmr_new, 32>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_pmr_new, 128>)->ThreadRange(1, 16);
+BENCHMARK(pmr_deallocate<policy_pmr_new, 1024>)->ThreadRange(1, 16);
+
+/*
+Run on (16 X 2313.68 MHz CPU s)
+CPU Caches:
+  L1 Data 48 KiB (x8)
+  L1 Instruction 32 KiB (x8)
+  L2 Unified 1280 KiB (x8)
+  L3 Unified 24576 KiB (x1)
+------------------------------------------------------------------------------------------
+Benchmark                                                Time             CPU   Iterations
+------------------------------------------------------------------------------------------
+pmr_allocate<policy_malloc, 8>/threads:1              28.9 ns         29.8 ns     29866667
+pmr_allocate<policy_malloc, 8>/threads:2              28.9 ns         53.7 ns     12800000
+pmr_allocate<policy_malloc, 8>/threads:4              13.4 ns         43.9 ns     14933332
+pmr_allocate<policy_malloc, 8>/threads:8              11.3 ns         68.4 ns      8000000
+pmr_allocate<policy_malloc, 8>/threads:16             5.07 ns         56.7 ns     14336000
+
+pmr_allocate<policy_malloc, 32>/threads:1             44.0 ns         42.1 ns     19298462
+pmr_allocate<policy_malloc, 32>/threads:2             27.4 ns         54.9 ns     12800000
+pmr_allocate<policy_malloc, 32>/threads:4             11.7 ns         47.1 ns     17920000
+pmr_allocate<policy_malloc, 32>/threads:8             5.96 ns         43.7 ns     21082352
+pmr_allocate<policy_malloc, 32>/threads:16            4.09 ns         56.7 ns     17920000
+
+pmr_allocate<policy_malloc, 128>/threads:1            45.8 ns         39.6 ns     16592593
+pmr_allocate<policy_malloc, 128>/threads:2            36.9 ns         75.3 ns      9955556
+pmr_allocate<policy_malloc, 128>/threads:4            16.3 ns         66.7 ns     11946668
+pmr_allocate<policy_malloc, 128>/threads:8            10.7 ns         77.1 ns     13784616
+pmr_allocate<policy_malloc, 128>/threads:16           7.87 ns         94.8 ns     14336000
+
+pmr_allocate<policy_malloc, 1024>/threads:1           75.5 ns         78.8 ns      8726261
+pmr_allocate<policy_malloc, 1024>/threads:2           49.6 ns         46.9 ns     20000000
+pmr_allocate<policy_malloc, 1024>/threads:4           18.4 ns         40.8 ns     29866668
+pmr_allocate<policy_malloc, 1024>/threads:8           6.56 ns         25.6 ns     29866664
+pmr_allocate<policy_malloc, 1024>/threads:16          6.25 ns         56.6 ns     16000000
+------------------------------------------------------------------------------------------
+pmr_deallocate<policy_malloc, 8>/threads:1            18.6 ns         19.9 ns     47786667
+pmr_deallocate<policy_malloc, 8>/threads:2            8.52 ns         16.2 ns     47157894
+pmr_deallocate<policy_malloc, 8>/threads:4            4.75 ns         18.8 ns     40000000
+pmr_deallocate<policy_malloc, 8>/threads:8            3.18 ns         24.7 ns     51200000
+pmr_deallocate<policy_malloc, 8>/threads:16           2.94 ns         38.1 ns     16000000
+
+pmr_deallocate<policy_malloc, 32>/threads:1           18.0 ns         16.7 ns     45875200
+pmr_deallocate<policy_malloc, 32>/threads:2           8.76 ns         19.9 ns     47157894
+pmr_deallocate<policy_malloc, 32>/threads:4           4.50 ns         14.6 ns     44800000
+pmr_deallocate<policy_malloc, 32>/threads:8           2.70 ns         16.7 ns     59733336
+pmr_deallocate<policy_malloc, 32>/threads:16          2.30 ns         36.6 ns     23893328
+
+pmr_deallocate<policy_malloc, 128>/threads:1          17.9 ns         16.3 ns     34461538
+pmr_deallocate<policy_malloc, 128>/threads:2          8.29 ns         21.0 ns     66901334
+pmr_deallocate<policy_malloc, 128>/threads:4          4.40 ns         14.5 ns     40000000
+pmr_deallocate<policy_malloc, 128>/threads:8          2.65 ns         20.1 ns     80000000
+pmr_deallocate<policy_malloc, 128>/threads:16         2.95 ns         40.5 ns     24717248
+
+pmr_deallocate<policy_malloc, 1024>/threads:1         19.0 ns         20.4 ns     34461538
+pmr_deallocate<policy_malloc, 1024>/threads:2         8.62 ns         19.7 ns     38956522
+pmr_deallocate<policy_malloc, 1024>/threads:4         4.70 ns         11.7 ns     64000000
+pmr_deallocate<policy_malloc, 1024>/threads:8         2.80 ns         16.0 ns     80000000
+pmr_deallocate<policy_malloc, 1024>/threads:16        2.45 ns         26.1 ns     27569232
+------------------------------------------------------------------------------------------
+Benchmark                                                Time             CPU   Iterations
+------------------------------------------------------------------------------------------
+pmr_allocate<policy_cpp_new, 8>/threads:1             69.5 ns         78.5 ns      8960000
+pmr_allocate<policy_cpp_new, 8>/threads:2             24.0 ns         40.1 ns     17920000
+pmr_allocate<policy_cpp_new, 8>/threads:4             10.4 ns         37.1 ns     29866668
+pmr_allocate<policy_cpp_new, 8>/threads:8             5.39 ns         42.2 ns     21082352
+pmr_allocate<policy_cpp_new, 8>/threads:16            3.40 ns         45.9 ns     16000000
+
+pmr_allocate<policy_cpp_new, 32>/threads:1            29.4 ns         29.5 ns     34461538
+pmr_allocate<policy_cpp_new, 32>/threads:2            24.8 ns         43.9 ns     14933334
+pmr_allocate<policy_cpp_new, 32>/threads:4            11.5 ns         45.1 ns     16290908
+pmr_allocate<policy_cpp_new, 32>/threads:8            5.26 ns         34.8 ns     25600000
+pmr_allocate<policy_cpp_new, 32>/threads:16           5.82 ns         90.7 ns      5513840
+
+pmr_allocate<policy_cpp_new, 128>/threads:1           74.0 ns         66.3 ns      8960000
+pmr_allocate<policy_cpp_new, 128>/threads:2           37.7 ns         80.6 ns     14933334
+pmr_allocate<policy_cpp_new, 128>/threads:4           15.1 ns         52.1 ns     13784616
+pmr_allocate<policy_cpp_new, 128>/threads:8           9.84 ns         63.2 ns     12358624
+pmr_allocate<policy_cpp_new, 128>/threads:16          8.05 ns          110 ns     11946672
+
+pmr_allocate<policy_cpp_new, 1024>/threads:1          79.5 ns         82.8 ns     10000000
+pmr_allocate<policy_cpp_new, 1024>/threads:2          27.2 ns         59.6 ns     14933334
+pmr_allocate<policy_cpp_new, 1024>/threads:4          12.3 ns         37.5 ns     40000000
+pmr_allocate<policy_cpp_new, 1024>/threads:8          10.3 ns         29.8 ns     39822224
+pmr_allocate<policy_cpp_new, 1024>/threads:16         6.17 ns         39.1 ns     16000000
+------------------------------------------------------------------------------------------
+pmr_deallocate<policy_cpp_new, 8>/threads:1           17.9 ns         18.9 ns     50301754
+pmr_deallocate<policy_cpp_new, 8>/threads:2           8.73 ns         15.4 ns     51794580
+pmr_deallocate<policy_cpp_new, 8>/threads:4           4.26 ns         15.2 ns     40000000
+pmr_deallocate<policy_cpp_new, 8>/threads:8           2.46 ns         17.9 ns     71680000
+pmr_deallocate<policy_cpp_new, 8>/threads:16          2.20 ns         34.0 ns     27569232
+
+pmr_deallocate<policy_cpp_new, 32>/threads:1          16.1 ns         16.5 ns     56000000
+pmr_deallocate<policy_cpp_new, 32>/threads:2          8.84 ns         16.1 ns     68923076
+pmr_deallocate<policy_cpp_new, 32>/threads:4          4.48 ns         19.5 ns     44800000
+pmr_deallocate<policy_cpp_new, 32>/threads:8          2.65 ns         15.3 ns     35840000
+pmr_deallocate<policy_cpp_new, 32>/threads:16         2.20 ns         35.3 ns     23893328
+
+pmr_deallocate<policy_cpp_new, 128>/threads:1         18.3 ns         21.1 ns     40727273
+pmr_deallocate<policy_cpp_new, 128>/threads:2         8.83 ns         15.6 ns     38956522
+pmr_deallocate<policy_cpp_new, 128>/threads:4         4.51 ns         17.6 ns     40000000
+pmr_deallocate<policy_cpp_new, 128>/threads:8         2.93 ns         18.4 ns     39841984
+pmr_deallocate<policy_cpp_new, 128>/threads:16        2.85 ns         36.1 ns     16000000
+
+pmr_deallocate<policy_cpp_new, 1024>/threads:1        19.6 ns         16.0 ns     49777778
+pmr_deallocate<policy_cpp_new, 1024>/threads:2        8.90 ns         17.9 ns     43631304
+pmr_deallocate<policy_cpp_new, 1024>/threads:4        4.93 ns         13.7 ns     40000000
+pmr_deallocate<policy_cpp_new, 1024>/threads:8        2.72 ns         19.9 ns     80000000
+pmr_deallocate<policy_cpp_new, 1024>/threads:16       2.23 ns         29.0 ns     39822224
+------------------------------------------------------------------------------------------
+Benchmark                                                Time             CPU   Iterations
+------------------------------------------------------------------------------------------
+pmr_allocate<policy_pmr_new, 8>/threads:1             17.6 ns         18.8 ns     49777778
+pmr_allocate<policy_pmr_new, 8>/threads:2             9.16 ns         14.5 ns     34461538
+pmr_allocate<policy_pmr_new, 8>/threads:4             4.82 ns         18.8 ns     40000000
+pmr_allocate<policy_pmr_new, 8>/threads:8             2.73 ns         17.4 ns     71680000
+pmr_allocate<policy_pmr_new, 8>/threads:16            2.10 ns         34.1 ns     24717248
+
+pmr_allocate<policy_pmr_new, 32>/threads:1            17.5 ns         14.6 ns     44800000
+pmr_allocate<policy_pmr_new, 32>/threads:2            8.88 ns         16.0 ns     38956522
+pmr_allocate<policy_pmr_new, 32>/threads:4            4.71 ns         17.8 ns     44800000
+pmr_allocate<policy_pmr_new, 32>/threads:8            2.57 ns         16.7 ns     44800000
+pmr_allocate<policy_pmr_new, 32>/threads:16           2.08 ns         41.0 ns     16000000
+
+pmr_allocate<policy_pmr_new, 128>/threads:1           18.5 ns         14.4 ns     44600889
+pmr_allocate<policy_pmr_new, 128>/threads:2           10.7 ns         22.5 ns     38956522
+pmr_allocate<policy_pmr_new, 128>/threads:4           5.09 ns         21.3 ns     44800000
+pmr_allocate<policy_pmr_new, 128>/threads:8           2.78 ns         19.6 ns     59733336
+pmr_allocate<policy_pmr_new, 128>/threads:16          2.33 ns         28.8 ns     26548144
+
+pmr_allocate<policy_pmr_new, 1024>/threads:1          24.8 ns         27.9 ns     22400000
+pmr_allocate<policy_pmr_new, 1024>/threads:2          12.8 ns         24.0 ns     35840000
+pmr_allocate<policy_pmr_new, 1024>/threads:4          6.67 ns         26.5 ns     44800000
+pmr_allocate<policy_pmr_new, 1024>/threads:8          4.28 ns         28.3 ns     29866664
+pmr_allocate<policy_pmr_new, 1024>/threads:16         3.21 ns         41.0 ns     16000000
+------------------------------------------------------------------------------------------
+pmr_deallocate<policy_pmr_new, 8>/threads:1           17.1 ns         16.3 ns     47786667
+pmr_deallocate<policy_pmr_new, 8>/threads:2           8.89 ns         18.1 ns     34461538
+pmr_deallocate<policy_pmr_new, 8>/threads:4           4.50 ns         16.1 ns     35840000
+pmr_deallocate<policy_pmr_new, 8>/threads:8           2.77 ns         17.3 ns     59733336
+pmr_deallocate<policy_pmr_new, 8>/threads:16          1.98 ns         34.2 ns     16000000
+
+pmr_deallocate<policy_pmr_new, 32>/threads:1          17.1 ns         14.8 ns     49777778
+pmr_deallocate<policy_pmr_new, 32>/threads:2          8.70 ns         18.7 ns     56000000
+pmr_deallocate<policy_pmr_new, 32>/threads:4          4.58 ns         14.3 ns     44800000
+pmr_deallocate<policy_pmr_new, 32>/threads:8          2.72 ns         17.3 ns     89600000
+pmr_deallocate<policy_pmr_new, 32>/threads:16         2.04 ns         30.5 ns     25600000
+
+pmr_deallocate<policy_pmr_new, 128>/threads:1         17.2 ns         15.3 ns     44800000
+pmr_deallocate<policy_pmr_new, 128>/threads:2         8.67 ns         15.7 ns     52705882
+pmr_deallocate<policy_pmr_new, 128>/threads:4         4.67 ns         18.7 ns     35840000
+pmr_deallocate<policy_pmr_new, 128>/threads:8         2.76 ns         18.0 ns     39822224
+pmr_deallocate<policy_pmr_new, 128>/threads:16        2.04 ns         28.3 ns     27569232
+
+pmr_deallocate<policy_pmr_new, 1024>/threads:1        17.2 ns         21.5 ns     32000000
+pmr_deallocate<policy_pmr_new, 1024>/threads:2        8.74 ns         16.0 ns     38956522
+pmr_deallocate<policy_pmr_new, 1024>/threads:4        4.84 ns         16.7 ns     44800000
+pmr_deallocate<policy_pmr_new, 1024>/threads:8        2.73 ns         16.0 ns     44800000
+pmr_deallocate<policy_pmr_new, 1024>/threads:16       2.04 ns         37.1 ns     16000000
+*/
\ No newline at end of file
diff --git a/benchmark/xmake.lua b/benchmark/xmake.lua
new file mode 100644
index 00000000..d78539a6
--- /dev/null
+++ b/benchmark/xmake.lua
@@ -0,0 +1,26 @@
+add_requires("benchmark 1.9.*", "fmt 11.0.*")
+
+target("benchmark-ipc")
+  set_kind("binary")
+  add_deps("imp", "pmr", "ipc")
+  add_packages("benchmark", "fmt")
+  if is_os("windows") then
+    add_ldflags("/subsystem:console")
+  elseif is_os("linux") then
+    add_syslinks("rt")
+  end
+  on_config(config_target_compilation)
+  on_config(function (target)
+    if target:has_tool("cxx", "cl") then
+      target:add("defines", "_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING")
+    else
+      target:add("cxflags", "-Wno-missing-field-initializers"
+                          , "-Wno-unused-variable"
+                          , "-Wno-unused-function"
+                          , "-Wno-unused-result")
+    end
+  end)
+  add_includedirs("$(projectdir)/include"
+                , "$(projectdir)/src"
+                , "$(projectdir)/test")
+  add_files("*.cpp")
diff --git a/demo/chat/CMakeLists.txt b/demo/chat/CMakeLists.txt
deleted file mode 100755
index c5bcea84..00000000
--- a/demo/chat/CMakeLists.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-project(chat)
-
-file(GLOB SRC_FILES ./*.cpp)
-file(GLOB HEAD_FILES ./*.h)
-
-add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
-
-target_link_libraries(${PROJECT_NAME} ipc)
diff --git a/demo/chat/main.cpp b/demo/chat/main.cpp
deleted file mode 100755
index ec9c3be4..00000000
--- a/demo/chat/main.cpp
+++ /dev/null
@@ -1,62 +0,0 @@
-
-#include <iostream>
-#include <string>
-#include <thread>
-#include <regex>
-#include <atomic>
-
-#include "libipc/ipc.h"
-
-namespace {
-
-constexpr char const name__[] = "ipc-chat";
-constexpr char const quit__[] = "q";
-constexpr char const id__  [] = "c";
-
-inline std::size_t calc_unique_id() {
-    static ipc::shm::handle g_shm { "__CHAT_ACC_STORAGE__", sizeof(std::atomic<std::size_t>) };
-    return static_cast<std::atomic<std::size_t>*>(g_shm.get())->fetch_add(1, std::memory_order_relaxed);
-}
-
-ipc::channel sender__   { name__, ipc::sender   };
-ipc::channel receiver__ { name__, ipc::receiver };
-
-} // namespace
-
-int main() {
-    std::string buf, id = id__ + std::to_string(calc_unique_id());
-    std::regex  reg { "(c\\d+)> (.*)" };
-
-    std::thread r {[&id, &reg] {
-        std::cout << id << " is ready." << std::endl;
-        while (1) {
-            ipc::buff_t buf = receiver__.recv();
-            if (buf.empty()) break; // quit
-            std::string dat { buf.get<char const *>(), buf.size() - 1 };
-            std::smatch mid;
-            if (std::regex_match(dat, mid, reg)) {
-                if (mid.str(1) == id) {
-                    if (mid.str(2) == quit__) {
-                        break;
-                    }
-                    continue;
-                }
-            }
-            std::cout << dat << std::endl;
-        }
-        std::cout << id << " receiver is quit..." << std::endl;
-    }};
-
-    for (/*int i = 1*/;; /*++i*/) {
-        std::cin >> buf;
-        if (buf.empty() || (buf == quit__)) break;
-//        std::cout << "[" << i << "]" << std::endl;
-        sender__.send(id + "> " + buf);
-        buf.clear();
-    }
-
-    receiver__.disconnect();
-    r.join();
-    std::cout << id << " sender is quit..." << std::endl;
-    return 0;
-}
diff --git a/demo/msg_que/CMakeLists.txt b/demo/msg_que/CMakeLists.txt
deleted file mode 100755
index da0de717..00000000
--- a/demo/msg_que/CMakeLists.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-project(msg_que)
-
-include_directories(
-    ${LIBIPC_PROJECT_DIR}/3rdparty)
-
-file(GLOB SRC_FILES ./*.cpp)
-file(GLOB HEAD_FILES ./*.h)
-
-add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
-
-target_link_libraries(${PROJECT_NAME} ipc)
diff --git a/demo/msg_que/main.cpp b/demo/msg_que/main.cpp
deleted file mode 100644
index eda7f517..00000000
--- a/demo/msg_que/main.cpp
+++ /dev/null
@@ -1,137 +0,0 @@
-
-#include <signal.h>
-
-#include <iostream>
-#include <string>
-#include <atomic>
-#include <thread>
-#include <chrono>
-#include <cstddef>
-
-#include "libipc/ipc.h"
-#include "capo/random.hpp"
-
-namespace {
-
-constexpr char const name__  [] = "ipc-msg-que";
-constexpr char const mode_s__[] = "s";
-constexpr char const mode_r__[] = "r";
-
-constexpr std::size_t const min_sz = 128;
-constexpr std::size_t const max_sz = 1024 * 16;
-
-std::atomic<bool> is_quit__ {false};
-std::atomic<std::size_t> size_counter__ {0};
-
-using msg_que_t = ipc::chan<ipc::relat::single, ipc::relat::multi, ipc::trans::broadcast>;
-
-msg_que_t que__{ name__ };
-ipc::byte_t buff__[max_sz];
-capo::random<> rand__{ 
-    static_cast<int>(min_sz), 
-    static_cast<int>(max_sz)
-};
-
-inline std::string str_of_size(std::size_t sz) noexcept {
-    if (sz > 1024 * 1024) {
-        return std::to_string(sz / (1024 * 1024)) + " MB";
-    }
-    if (sz > 1024) {
-        return std::to_string(sz / 1024) + " KB";
-    }
-    return std::to_string(sz) + " bytes";
-}
-
-inline std::string speed_of(std::size_t sz) noexcept {
-    return str_of_size(sz) + "/s";
-}
-
-void do_counting() {
-    for (int i = 1; !is_quit__.load(std::memory_order_acquire); ++i) {
-        std::this_thread::sleep_for(std::chrono::milliseconds(100)); // 100 ms
-        if (i % 10) continue;
-        i = 0;
-        std::cout
-            << speed_of(size_counter__.exchange(0, std::memory_order_relaxed))
-            << std::endl;
-    }
-}
-
-void do_send() {
-    std::cout 
-        << __func__ << ": start [" 
-        << str_of_size(min_sz) << " - " << str_of_size(max_sz) 
-        << "]...\n";
-    if (!que__.reconnect(ipc::sender)) {
-        std::cerr << __func__ << ": connect failed.\n";
-    }
-    else {
-        std::thread counting{ do_counting };
-        while (!is_quit__.load(std::memory_order_acquire)) {
-            std::size_t sz = static_cast<std::size_t>(rand__());
-            if (!que__.send(ipc::buff_t(buff__, sz))) {
-                std::cerr << __func__ << ": send failed.\n";
-                std::cout << __func__ << ": waiting for receiver...\n";
-                if (!que__.wait_for_recv(1)) {
-                    std::cerr << __func__ << ": wait receiver failed.\n";
-                    is_quit__.store(true, std::memory_order_release);
-                    break;
-                }
-            }
-            size_counter__.fetch_add(sz, std::memory_order_relaxed);
-            std::this_thread::yield();
-        }
-        counting.join();
-    }
-    std::cout << __func__ << ": quit...\n";
-}
-
-void do_recv() {
-    std::cout
-        << __func__ << ": start ["
-        << str_of_size(min_sz) << " - " << str_of_size(max_sz)
-        << "]...\n";
-    if (!que__.reconnect(ipc::receiver)) {
-        std::cerr << __func__ << ": connect failed.\n";
-    }
-    else {
-        std::thread counting{ do_counting };
-        while (!is_quit__.load(std::memory_order_acquire)) {
-            auto msg = que__.recv();
-            if (msg.empty()) break;
-            size_counter__.fetch_add(msg.size(), std::memory_order_relaxed);
-        }
-        counting.join();
-    }
-    std::cout << __func__ << ": quit...\n";
-}
-
-} // namespace
-
-int main(int argc, char ** argv) {
-    if (argc < 2) return 0;
-
-    auto exit = [](int) {
-        is_quit__.store(true, std::memory_order_release);
-        que__.disconnect();
-    };
-    ::signal(SIGINT  , exit);
-    ::signal(SIGABRT , exit);
-    ::signal(SIGSEGV , exit);
-    ::signal(SIGTERM , exit);
-#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-    defined(WINCE) || defined(_WIN32_WCE)
-    ::signal(SIGBREAK, exit);
-#else
-    ::signal(SIGHUP  , exit);
-#endif
-
-    std::string mode {argv[1]};
-    if (mode == mode_s__) {
-        do_send();
-    } else if (mode == mode_r__) {
-        do_recv();
-    }
-    return 0;
-}
diff --git a/demo/send_recv/CMakeLists.txt b/demo/send_recv/CMakeLists.txt
deleted file mode 100644
index 9d3f0fbd..00000000
--- a/demo/send_recv/CMakeLists.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-project(send_recv)
-
-include_directories(
-    ${LIBIPC_PROJECT_DIR}/3rdparty)
-
-file(GLOB SRC_FILES ./*.cpp)
-file(GLOB HEAD_FILES ./*.h)
-
-add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
-
-target_link_libraries(${PROJECT_NAME} ipc)
diff --git a/demo/send_recv/main.cpp b/demo/send_recv/main.cpp
deleted file mode 100644
index 52287c2e..00000000
--- a/demo/send_recv/main.cpp
+++ /dev/null
@@ -1,72 +0,0 @@
-
-#include <signal.h>
-
-#include <iostream>
-#include <string>
-#include <thread>
-#include <chrono>
-#include <atomic>
-
-#include "libipc/ipc.h"
-
-namespace {
-
-std::atomic<bool> is_quit__ {false};
-ipc::channel *ipc__ = nullptr;
-
-void do_send(int size, int interval) {
-    ipc::channel ipc {"ipc", ipc::sender};
-    ipc__ = &ipc;
-    std::string buffer(size, 'A');
-    while (!is_quit__.load(std::memory_order_acquire)) {
-        std::cout << "send size: " << buffer.size() + 1 << "\n";
-        ipc.send(buffer, 0/*tm*/);
-        std::this_thread::sleep_for(std::chrono::milliseconds(interval));
-    }
-}
-
-void do_recv(int interval) {
-    ipc::channel ipc {"ipc", ipc::receiver};
-    ipc__ = &ipc;
-    while (!is_quit__.load(std::memory_order_acquire)) {
-        ipc::buff_t recv;
-        for (int k = 1; recv.empty(); ++k) {
-            std::cout << "recv waiting... " << k << "\n";
-            recv = ipc.recv(interval);
-            if (is_quit__.load(std::memory_order_acquire)) return;
-        }
-        std::cout << "recv size: " << recv.size() << "\n";
-    }
-}
-
-} // namespace
-
-int main(int argc, char ** argv) {
-    if (argc < 3) return -1;
-
-    auto exit = [](int) {
-        is_quit__.store(true, std::memory_order_release);
-        if (ipc__ != nullptr) ipc__->disconnect();
-    };
-    ::signal(SIGINT  , exit);
-    ::signal(SIGABRT , exit);
-    ::signal(SIGSEGV , exit);
-    ::signal(SIGTERM , exit);
-#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-    defined(WINCE) || defined(_WIN32_WCE)
-    ::signal(SIGBREAK, exit);
-#else
-    ::signal(SIGHUP  , exit);
-#endif
-
-    std::string mode {argv[1]};
-    if (mode == "send") {
-        if (argc < 4) return -1;
-        do_send(std::stoi(argv[2]) /*size*/, 
-                std::stoi(argv[3]) /*interval*/);
-    } else if (mode == "recv") {
-        do_recv(std::stoi(argv[2]) /*interval*/);
-    }
-    return 0;
-}
diff --git a/include/libconcur/bus.h b/include/libconcur/bus.h
new file mode 100644
index 00000000..0b1a80fc
--- /dev/null
+++ b/include/libconcur/bus.h
@@ -0,0 +1,33 @@
+/**
+ * \file libconcur/bus.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define concurrent data bus.
+ * \date 2023-04-17
+ */
+#pragma once
+
+#include "libconcur/def.h"
+#include "libconcur/data_model.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+template <typename T, typename PRelationT = relation::multi>
+class bus
+  : public data_model<T, trans::broadcast, PRelationT, relation::multi> {
+
+  using base_t = data_model<T, trans::broadcast, PRelationT, relation::multi>;
+
+public:
+  using base_t::base_t;
+
+  template <typename U>
+  bool broadcast(U &&value) noexcept {
+    return this->enqueue(std::forward<U>(value));
+  }
+
+  bool receive(typename base_t::value_type &value) noexcept {
+    return this->dequeue(value);
+  }
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/circular_queue.h b/include/libconcur/circular_queue.h
new file mode 100644
index 00000000..59c07e81
--- /dev/null
+++ b/include/libconcur/circular_queue.h
@@ -0,0 +1,34 @@
+/**
+ * \file libconcur/queue.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define concurrent circular queue.
+ * \date 2022-11-19
+ */
+#pragma once
+
+#include "libconcur/def.h"
+#include "libconcur/data_model.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+template <typename T, typename PRelationT = relation::multi
+                    , typename CRelationT = relation::multi>
+class circular_queue
+  : public data_model<T, trans::unicast, PRelationT, CRelationT> {
+
+  using base_t = data_model<T, trans::unicast, PRelationT, CRelationT>;
+
+public:
+  using base_t::base_t;
+
+  template <typename U>
+  bool push(U &&value) noexcept {
+    return this->enqueue(std::forward<U>(value));
+  }
+
+  bool pop(typename base_t::value_type &value) noexcept {
+    return this->dequeue(value);
+  }
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/concurrent.h b/include/libconcur/concurrent.h
new file mode 100644
index 00000000..d3f8b0f6
--- /dev/null
+++ b/include/libconcur/concurrent.h
@@ -0,0 +1,479 @@
+/**
+ * \file libconcur/concurrent.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define different policies for concurrent queue.
+ * \date 2022-11-07
+ */
+#pragma once
+
+#include <type_traits>
+#include <atomic>
+#include <array>
+#include <tuple>
+#include <cstdint>
+#include <climits>
+
+#include "libimp/span.h"
+#include "libimp/generic.h"
+
+#include "libconcur/def.h"
+#include "libconcur/element.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+/// \typedef The queue index type.
+using index_t = std::uint32_t;
+
+namespace detail_concurrent {
+
+template <typename T, typename = void>
+struct has_header : std::false_type {};
+template <typename T>
+struct has_header<T, ::LIBIMP::void_t<typename T::header>>
+  : std::true_type {};
+
+template <typename T, typename = void>
+struct has_header_impl : std::false_type {};
+template <typename T>
+struct has_header_impl<T, ::LIBIMP::void_t<typename T::header_impl>>
+  : std::true_type {};
+
+template <typename T, typename = void>
+struct has_context : std::false_type {};
+template <typename T>
+struct has_context<T, ::LIBIMP::void_t<typename T::context>>
+  : std::true_type {};
+
+template <typename T, typename = void>
+struct has_context_impl : std::false_type {};
+template <typename T>
+struct has_context_impl<T, ::LIBIMP::void_t<typename T::context_impl>>
+  : std::true_type {};
+
+template <typename T, bool = has_header<T>::value
+                    , bool = has_header_impl<T>::value>
+struct traits_header {
+  struct header {};
+};
+
+template <typename T, bool HasH>
+struct traits_header<T, true, HasH> {
+  using header = typename T::header;
+};
+
+template <typename T>
+struct traits_header<T, false, true> {
+  using header = typename T::header_impl;
+};
+
+template <typename T, bool = has_context<T>::value
+                    , bool = has_context_impl<T>::value>
+struct traits_context {
+  struct context {};
+};
+
+template <typename T, bool HasH>
+struct traits_context<T, true, HasH> {
+  using context = typename T::context;
+};
+
+template <typename T>
+struct traits_context<T, false, true> {
+  using context = typename T::context_impl;
+};
+
+} // namespace detail_concurrent
+
+/// \typedef Utility template for extracting object type internal traits.
+template <typename T>
+struct traits : detail_concurrent::traits_header<T>
+              , detail_concurrent::traits_context<T> {};
+
+/// \brief Multiplicity of the relationship.
+namespace relation {
+
+class single {};
+class multi  {};
+
+} // namespace relation
+
+/// \brief Transmission mode
+namespace trans {
+
+/// \brief In this transmission mode, the message transmission is similar to a queue. 
+/// When the receiving side is not timely enough, the sending side will be unable to write data.
+class unicast {};
+
+/// \brief In this transmission mode, the message will be perceived by each receiver. 
+/// When the receiving side is not timely enough, the sending side will overwrite unread data.
+class broadcast {};
+
+} // namespace trans
+
+/// \brief Determines whether type T can be implicitly converted to type U.
+template <typename T, typename U>
+using convertible = std::enable_if_t<std::is_convertible<T *, U *>::value, bool>;
+
+/// \brief Check whether the elems header type is valid.
+template <typename T, typename = void>
+struct is_elems_header : std::false_type {};
+template <typename T>
+struct is_elems_header<T, ::LIBIMP::void_t<
+    decltype(std::declval<index_t>() % std::declval<T>().circ_size), 
+    std::enable_if_t<std::is_convertible<decltype(std::declval<T>().valid()), bool>::value>>>
+  : std::true_type {};
+
+/// \brief Utility template for verifying elems header type.
+template <typename T>
+using verify_elems_header = std::enable_if_t<is_elems_header<T>::value, bool>;
+
+/**
+ * \brief Calculate the corresponding queue position modulo the index value.
+ * 
+ * \tparam H a elems header type
+ * \param hdr a elems header object
+ * \param idx a elems array index
+ * \return index_t - a corresponding queue position
+ */
+template <typename H, verify_elems_header<H> = true>
+constexpr index_t trunc_index(H const &hdr, index_t idx) noexcept {
+  // `circ_size == 2^N` => `idx & (circ_size - 1)`
+  return hdr.valid() ? (idx % hdr.circ_size) : 0;
+}
+
+/// \brief Producer algorithm implementation.
+template <typename TransModT, typename RelationT>
+struct producer;
+
+/// \brief Consumer algorithm implementation.
+template <typename TransModT, typename RelationT>
+struct consumer;
+
+/**
+ * \brief Algorithm definition under unicast transmission model.
+ * 
+ * \ref A bounded wait-free(almost) zero-copy MPMC queue written in C++11.
+ * Modified from MengRao/WFMPMC.
+ * Copyright (c) 2018. Meng Rao (https://github.com/MengRao/WFMPMC).
+*/
+
+/// \brief Single-write producer model implementation.
+template <>
+struct producer<trans::unicast, relation::single> {
+
+  struct header_impl {
+    index_t w_idx {0}; ///< write index
+    private: padding<decltype(w_idx)> ___;
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true>
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
+    auto w_idx = hdr.w_idx;
+    auto w_cur = trunc_index(hdr, w_idx);
+    auto &elem = elems[w_cur];
+    auto f_ct  = elem.get_flag();
+    // Verify index.
+    if ((f_ct != state::invalid_value) && 
+        (f_ct != w_idx)) {
+      return false; // full
+    }
+    // Get a valid index and iterate backwards.
+    hdr.w_idx += 1;
+    // Set data & flag.
+    elem.set_data(std::forward<U>(src));
+    elem.set_flag(static_cast<index_t>(~w_idx));
+    return true;
+  }
+};
+
+/// \brief Multi-write producer model implementation.
+template <>
+struct producer<trans::unicast, relation::multi> {
+
+  struct header_impl {
+    std::atomic<index_t> w_idx {0}; ///< write index
+    private: padding<decltype(w_idx)> ___;
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true>
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
+    auto w_idx = hdr.w_idx.load(std::memory_order_acquire);
+    for (;;) {
+      auto w_cur = trunc_index(hdr, w_idx);
+      auto &elem = elems[w_cur];
+      auto f_ct  = elem.get_flag();
+      // Verify index.
+      if ((f_ct != state::invalid_value) && 
+          (f_ct != w_idx)) {
+        return false; // full
+      }
+      // Get a valid index and iterate backwards.
+      if (!hdr.w_idx.compare_exchange_weak(w_idx, w_idx + 1, std::memory_order_acq_rel)) {
+        continue;
+      }
+      // Set data & flag.
+      elem.set_data(std::forward<U>(src));
+      elem.set_flag(static_cast<index_t>(~w_idx));
+      return true;
+    }
+  }
+};
+
+/// \brief Single-read consumer model implementation.
+template <>
+struct consumer<trans::unicast, relation::single> {
+
+  struct header_impl {
+    index_t r_idx {0}; ///< read index
+    private: padding<decltype(r_idx)> ___;
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true,
+            std::enable_if_t<std::is_nothrow_move_assignable<U>::value, bool> = true>
+  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &des) noexcept {
+    auto r_idx = hdr.r_idx;
+    auto r_cur = trunc_index(hdr, r_idx);
+    auto &elem = elems[r_cur];
+    auto f_ct  = elem.get_flag();
+    // Verify index.
+    if (f_ct != static_cast<index_t>(~r_idx)) {
+      return false; // empty
+    }
+    // Get a valid index and iterate backwards.
+    hdr.r_idx += 1;
+    // Get data & set flag.
+    des = LIBCONCUR::get(std::move(elem));
+    elem.set_flag(r_idx + hdr.circ_size);
+    return true;
+  }
+};
+
+/// \brief Multi-read consumer model implementation.
+template <>
+struct consumer<trans::unicast, relation::multi> {
+
+  struct header_impl {
+    std::atomic<index_t> r_idx {0}; ///< read index
+    private: padding<decltype(r_idx)> ___;
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true,
+            std::enable_if_t<std::is_nothrow_move_assignable<U>::value, bool> = true>
+  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &des) noexcept {
+    auto r_idx = hdr.r_idx.load(std::memory_order_acquire);
+    for (;;) {
+      auto r_cur = trunc_index(hdr, r_idx);
+      auto &elem = elems[r_cur];
+      auto f_ct  = elem.get_flag();
+      // Verify index.
+      if (f_ct != static_cast<index_t>(~r_idx)) {
+        return false; // empty
+      }
+      // Get a valid index and iterate backwards.
+      if (!hdr.r_idx.compare_exchange_weak(r_idx, r_idx + 1, std::memory_order_acq_rel)) {
+        continue;
+      }
+      // Get data & set flag.
+      des = LIBCONCUR::get(std::move(elem));
+      elem.set_flag(r_idx + hdr.circ_size);
+      return true;
+    }
+  }
+};
+
+/**
+ * \brief Algorithm definition under broadcast transmission model.
+*/
+
+/// \brief Single-write producer model implementation.
+template <>
+struct producer<trans::broadcast, relation::single> {
+
+  struct header_impl {
+    std::atomic<index_t> w_idx {0}; ///< write index
+    std::atomic<index_t> w_beg {0}; ///< write begin index
+    private: padding<std::tuple<decltype(w_idx), decltype(w_beg)>> ___;
+
+  public:
+    void get(index_t &idx, index_t &beg) const noexcept {
+      idx = w_idx.load(std::memory_order_relaxed);
+      beg = w_beg.load(std::memory_order_relaxed);
+    }
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true>
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
+    auto w_idx = hdr.w_idx.load(std::memory_order_acquire);
+    auto w_beg = hdr.w_beg.load(std::memory_order_relaxed);
+    auto w_cur = trunc_index(hdr, w_idx);
+    auto &elem = elems[w_cur];
+    // Move the queue head index.
+    if (w_beg + hdr.circ_size <= w_idx) {
+      hdr.w_beg.fetch_add(1, std::memory_order_release);
+    }
+    // Get a valid index and iterate backwards.
+    hdr.w_idx.fetch_add(1, std::memory_order_release);
+    // Set data & flag.
+    elem.set_flag(w_idx | state::enqueue_mask);
+    elem.set_data(std::forward<U>(src));
+    elem.set_flag(w_idx);
+    return true;
+  }
+};
+
+/// \brief Multi-write producer model implementation.
+template <>
+struct producer<trans::broadcast, relation::multi> {
+
+  struct header_impl {
+    std::atomic<std::uint64_t> w_contexts {0}; ///< write contexts, combined current and starting index.
+    private: padding<decltype(w_contexts)> ___;
+
+  public:
+    void get(index_t &idx, index_t &beg) const noexcept {
+      auto w_contexts = this->w_contexts.load(std::memory_order_relaxed);
+      idx = get_index(w_contexts);
+      beg = get_begin(w_contexts);
+    }
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            verify_elems_header<H> = true,
+            convertible<H, header_impl> = true>
+  static bool enqueue(::LIBIMP::span<element<T>> elems, H &hdr, C &/*ctx*/, U &&src) noexcept {
+    auto w_contexts = hdr.w_contexts.load(std::memory_order_acquire);
+    index_t w_idx;
+    for (;;) {
+      w_idx = get_index(w_contexts);
+      auto w_beg = get_begin(w_contexts);
+      // Move the queue head index.
+      if (w_beg + hdr.circ_size <= w_idx) {
+        w_beg += 1;
+      }
+      // Update write contexts.
+      auto n_contexts = make_w_contexts(w_idx + 1/*iterate backwards*/, w_beg);
+      if (hdr.w_contexts.compare_exchange_weak(w_contexts, n_contexts, std::memory_order_acq_rel)) {
+        break;
+      }
+    }
+    // Get element.
+    auto w_cur = trunc_index(hdr, w_idx);
+    auto &elem = elems[w_cur];
+    // Set data & flag. Dirty write is not considered here. 
+    // By default, when dirty writes occur, the writing behavior itself must be atomic.
+    elem.set_flag(w_idx | state::enqueue_mask);
+    elem.set_data(std::forward<U>(src));
+    elem.set_flag(w_idx);
+    return true;
+  }
+
+private:
+  friend struct producer::header_impl;
+
+  static constexpr index_t get_index(state::flag_t flags) noexcept {
+    return index_t(flags);
+  }
+
+  static constexpr index_t get_begin(state::flag_t flags) noexcept {
+    return index_t(flags >> (sizeof(index_t) * CHAR_BIT));
+  }
+
+  static constexpr std::uint64_t make_w_contexts(index_t idx, index_t beg) noexcept {
+    return std::uint64_t(idx) | (std::uint64_t(beg) << (sizeof(index_t) * CHAR_BIT));
+  }
+};
+
+/// \brief Multi-read consumer model implementation.
+/// Single-read consumer model is not required.
+template <>
+struct consumer<trans::broadcast, relation::multi> {
+
+  struct context_impl {
+    index_t       r_idx {0};                    ///< read index
+    state::flag_t w_lst {state::invalid_value}; ///< last write index
+  };
+
+  template <typename T, typename H, typename C, typename U, 
+            verify_elems_header<H> = true,
+            convertible<C, context_impl> = true,
+            std::enable_if_t<std::is_nothrow_copy_assignable<U>::value, bool> = true>
+  static bool dequeue(::LIBIMP::span<element<T>> elems, H &hdr, C &ctx, U &des) noexcept {
+    index_t w_idx, w_beg;
+    hdr.get(w_idx, w_beg);
+    // Verify index.
+    if (ctx.w_lst == w_idx) {
+      return false; // not ready
+    }
+    // Obtain the queue head index if we need.
+    if ((ctx.r_idx <  w_beg) || 
+        (ctx.r_idx >= w_beg + hdr.circ_size)) {
+      ctx.r_idx = w_beg;
+    }
+    auto r_cur = trunc_index(hdr, ctx.r_idx);
+    auto &elem = elems[r_cur];
+    auto f_ct = elem.get_flag();
+    if (f_ct == state::invalid_value) {
+      return false; // empty
+    }
+    // Try getting data.
+    for (;;) {
+      if (f_ct & state::enqueue_mask) {
+        return false; // unreadable
+      }
+      des = LIBCONCUR::get(elem);
+      // Correct data can be obtained only if 
+      // the elem data is not modified during the getting process.
+      if (elem.cas_flag(f_ct, f_ct)) break;
+    }
+    // Get a valid index and iterate backwards.
+    ctx.w_lst = index_t(f_ct) + 1;
+    ctx.r_idx += 1;
+    return true;
+  }
+};
+
+/**
+ * \brief Producer-consumer implementation.
+ * 
+ * \tparam TransModT transmission mode (trans::unicast/trans::broadcast)
+ * \tparam ProdModT producer relationship model (relation::single/relation::multi)
+ * \tparam ConsModT consumer relationship model (relation::single/relation::multi)
+ */
+template <typename TransModT, typename ProdModT, typename ConsModT>
+struct prod_cons : producer<TransModT, ProdModT>
+                 , consumer<TransModT, ConsModT> {
+
+  /// \brief Mixing producer and consumer header definitions.
+  struct header : traits<producer<TransModT, ProdModT>>::header
+                , traits<consumer<TransModT, ConsModT>>::header {
+    index_t const circ_size;
+
+    header(index_t cs) noexcept
+      : circ_size(cs) {}
+
+    template <typename T>
+    header(::LIBIMP::span<element<T>> const &elems) noexcept
+      : circ_size(static_cast<index_t>(elems.size())) {}
+
+    bool valid() const noexcept {
+      // circ_size must be a power of two.
+      return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
+    }
+  };
+
+  /// \brief Mixing producer and consumer context definitions.
+  struct context : traits<producer<TransModT, ProdModT>>::context
+                 , traits<consumer<TransModT, ConsModT>>::context {};
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/data_model.h b/include/libconcur/data_model.h
new file mode 100644
index 00000000..eba484b9
--- /dev/null
+++ b/include/libconcur/data_model.h
@@ -0,0 +1,169 @@
+/**
+ * \file libconcur/data_model.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the concurrent data model.
+ * \date 2023-05-28
+ */
+#pragma once
+
+#include <atomic>
+#include <array>
+#include <tuple>
+#include <type_traits>
+#include <cstddef>
+#include <cstdint>
+
+#include "libimp/uninitialized.h"
+#include "libimp/detect_plat.h"
+#include "libimp/aligned.h"
+
+#include "libpmr/allocator.h"
+#include "libpmr/memory_resource.h"
+
+#include "libconcur/def.h"
+#include "libconcur/concurrent.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+template <typename T, typename TransModT, typename PRelationT, typename CRelationT>
+class data_model {
+
+  static_assert(std::is_trivially_copyable<T>::value, "T must be trivially copyable.");
+
+public:
+  using producer_relation_t = PRelationT;
+  using consumer_relation_t = CRelationT;
+  using transmission_mode_t = TransModT;
+
+  using model_type = prod_cons<transmission_mode_t, producer_relation_t, consumer_relation_t>;
+  using value_type = T;
+  using size_type  = std::int64_t;
+
+private:
+  struct data {
+    model_type model_;
+    typename concur::traits<model_type>::header header_;
+    ::LIBIMP::aligned<element<value_type>> elements_start_;
+
+    template <typename U>
+    data(U &&model) : header_(std::forward<U>(model)) {
+      auto elements = this->elements();
+      typename decltype(elements)::size_type i = 0;
+      LIBIMP_TRY {
+        for (; i < elements.size(); ++i) {
+          std::ignore = ::LIBIMP::construct<element<value_type>>(&elements[i]);
+        }
+      } LIBIMP_CATCH(...) {
+        for (decltype(i) k = 0; k < i; ++k) {
+          std::ignore = ::LIBIMP::destroy<element<value_type>>(&elements[k]);
+        }
+        throw;
+      }
+    }
+
+    ~data() noexcept {
+      for (auto &elem : this->elements()) {
+        std::ignore = ::LIBIMP::destroy<element<value_type>>(&elem);
+      }
+    }
+
+    static std::size_t size_of(index_t circ_size) noexcept {
+      return sizeof(struct data) + ( (circ_size - 1) * sizeof(element<value_type>) );
+    }
+
+    std::size_t byte_size() const noexcept {
+      return size_of(header_.circ_size);
+    }
+
+    /// \brief element<value_type> elements[0];
+    ::LIBIMP::span<element<value_type>> elements() noexcept {
+      return {elements_start_.ptr(), header_.circ_size};
+    }
+  };
+
+  data *init(index_t circ_size) noexcept {
+    void *data_ptr = nullptr;
+    LIBIMP_TRY {
+      data_ptr = data_allocator_.allocate(data::size_of(circ_size));
+      if (data_ptr == nullptr) {
+        return nullptr;
+      }
+      return ::LIBIMP::construct<data>(data_ptr, circ_size);
+    } LIBIMP_CATCH(...) {
+      data_allocator_.deallocate(data_ptr, data::size_of(circ_size));
+      return nullptr;
+    }
+  }
+
+  ::LIBPMR::allocator data_allocator_;
+  std::atomic<size_type> size_ {0};
+  data *data_;
+  typename concur::traits<model_type>::context context_ {};
+
+protected:
+  template <typename U>
+  bool enqueue(U &&value) noexcept {
+    if (!valid()) return false;
+    if (!data_->model_.enqueue(data_->elements(), data_->header_, context_, std::forward<U>(value))) {
+      return false;
+    }
+    size_.fetch_add(1, std::memory_order_relaxed);
+    return true;
+  }
+
+  bool dequeue(value_type &value) noexcept {
+    if (!valid()) return false;
+    if (!data_->model_.dequeue(data_->elements(), data_->header_, context_, value)) {
+      return false;
+    }
+    size_.fetch_sub(1, std::memory_order_relaxed);
+    return true;
+  }
+
+public:
+  data_model(data_model const &) = delete;
+  data_model(data_model &&) = delete;
+  data_model &operator=(data_model const &) = delete;
+  data_model &operator=(data_model &&) = delete;
+
+  ~data_model() noexcept {
+    if (valid()) {
+      auto sz = data_->byte_size();
+      std::ignore = ::LIBIMP::destroy<data>(data_);
+      data_allocator_.deallocate(data_, sz);
+    }
+  }
+
+  template <typename MR, ::LIBPMR::verify_memory_resource<MR> = true>
+  explicit data_model(index_t circ_size, MR *memory_resource) noexcept
+    : data_allocator_(memory_resource)
+    , data_(init(circ_size)) {}
+
+  template <typename MR, ::LIBPMR::verify_memory_resource<MR> = true>
+  explicit data_model(MR *memory_resource) noexcept
+    : data_model(default_circle_buffer_size, memory_resource) {}
+
+  explicit data_model(index_t circ_size) noexcept
+    : data_model(circ_size, ::LIBPMR::new_delete_resource::get()) {}
+
+  data_model() noexcept
+    : data_model(default_circle_buffer_size) {}
+
+  bool valid() const noexcept {
+    return data_ != nullptr;
+  }
+
+  explicit operator bool() const noexcept {
+    return valid();
+  }
+
+  size_type approx_size() const noexcept {
+    return size_.load(std::memory_order_relaxed);
+  }
+
+  bool empty() const noexcept {
+    return !valid() || (approx_size() == 0);
+  }
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/def.h b/include/libconcur/def.h
new file mode 100644
index 00000000..3e8b49c2
--- /dev/null
+++ b/include/libconcur/def.h
@@ -0,0 +1,36 @@
+/**
+ * \file libconcur/def.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the trivial configuration information for concurrency.
+ * \date 2022-11-07
+ */
+#pragma once
+
+#include <cstddef>  // std::max_align_t
+#include <new>      // std::hardware_destructive_interference_size
+
+#include "libimp/detect_plat.h"
+
+#define LIBCONCUR                concur
+#define LIBCONCUR_NAMESPACE_BEG_ namespace LIBCONCUR {
+#define LIBCONCUR_NAMESPACE_END_ }
+
+LIBCONCUR_NAMESPACE_BEG_
+
+/// \brief Constants.
+
+enum : std::size_t {
+  /// \brief Minimum offset between two objects to avoid false sharing.
+  /// \see https://en.cppreference.com/w/cpp/thread/hardware_destructive_interference_size
+  cache_line_size =
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_hardware_interference_size)
+    ( std::hardware_destructive_interference_size < alignof(std::max_align_t) ) ? 64 
+    : std::hardware_destructive_interference_size,
+#else
+    64,
+#endif
+
+  default_circle_buffer_size = 1024,
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/element.h b/include/libconcur/element.h
new file mode 100644
index 00000000..c0f06d21
--- /dev/null
+++ b/include/libconcur/element.h
@@ -0,0 +1,102 @@
+/**
+ * \file libconcur/element.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define concurrent queue element abstraction.
+ * \date 2022-11-19
+ */
+#pragma once
+
+#include <atomic>
+#include <utility>
+#include <cstdint>
+#include <exception>
+
+#include "libimp/detect_plat.h"
+#include "libimp/log.h"
+#include "libimp/byte.h"
+#include "libimp/generic.h"
+
+#include "libconcur/def.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+namespace state {
+
+/// \typedef The state flag type for the queue element.
+using flag_t = std::uint64_t;
+
+enum : flag_t {
+  invalid_value = ~flag_t(0),
+  enqueue_mask  = invalid_value << 32,
+};
+
+} // namespace state
+
+/// \brief Define the padding type.
+template <typename T>
+using padding = std::array<::LIBIMP::byte, (cache_line_size - sizeof(T))>;
+
+/**
+ * \class template <typename T> element
+ * \brief User-defined type element wrapper.
+ * Wrapper for wrapping user-defined types as elements.
+ * 
+ * @tparam T - User-defined type.
+ */
+template <typename T>
+class element {
+
+  template <typename E>
+  friend auto get(E &&elem) noexcept;
+
+  /// \brief Committed flag.
+  std::atomic<state::flag_t> f_ct_;
+  padding<decltype(f_ct_)> ___;
+
+  /// \brief The user data segment.
+  T data_;
+
+  /// \brief Disable copy & move.
+  element(element const &) = delete;
+  element &operator=(element const &) = delete;
+
+public:
+  using value_type = T;
+
+  template <typename... A>
+  element(A &&...args) 
+    noexcept(noexcept(T{std::forward<A>(args)...}))
+    : f_ct_{state::invalid_value}
+    , data_{std::forward<A>(args)...} {}
+
+  template <typename U>
+  void set_data(U &&src) noexcept {
+    LIBIMP_LOG_();
+    LIBIMP_TRY {
+      data_ = std::forward<U>(src);
+    } LIBIMP_CATCH(...) {
+      log.error("failed: `data = std::forward<U>(src)`.",
+                "\n\texception: ", ::LIBIMP::log::exception_string(std::current_exception()));
+    }
+  }
+
+  void set_flag(state::flag_t flag, 
+                std::memory_order const order = std::memory_order_release) noexcept {
+    f_ct_.store(flag, order);
+  }
+
+  bool cas_flag(state::flag_t &expected, state::flag_t flag, 
+                std::memory_order const order = std::memory_order_acq_rel) noexcept {
+    return f_ct_.compare_exchange_weak(expected, flag, order);
+  }
+
+  state::flag_t get_flag() const noexcept {
+    return f_ct_.load(std::memory_order_acquire);
+  }
+};
+
+template <typename E>
+auto get(E &&elem) noexcept {
+  return static_cast<imp::copy_cvref_t<E, typename std::decay<E>::type::value_type>>(elem.data_);
+}
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libconcur/intrusive_stack.h b/include/libconcur/intrusive_stack.h
new file mode 100644
index 00000000..e315ebb7
--- /dev/null
+++ b/include/libconcur/intrusive_stack.h
@@ -0,0 +1,67 @@
+/**
+ * \file libconcur/intrusive_stack.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define concurrent intrusive stack.
+ * \date 2023-11-18
+ */
+#pragma once
+
+#include <atomic>
+
+#include "libconcur/def.h"
+
+LIBCONCUR_NAMESPACE_BEG_
+
+/// \brief Intrusive stack node.
+/// \tparam T The type of the value.
+template <typename T>
+struct intrusive_node {
+  T value;
+  std::atomic<intrusive_node *> next;
+};
+
+/// \brief Intrusive stack.
+/// \tparam T The type of the value.
+/// \tparam Node The type of the node.
+template <typename T, typename Node = intrusive_node<T>>
+class intrusive_stack {
+public:
+  using node = Node;
+
+private:
+  std::atomic<node *> top_{nullptr};
+
+public:
+  intrusive_stack(intrusive_stack const &) = delete;
+  intrusive_stack(intrusive_stack &&) = delete;
+  intrusive_stack &operator=(intrusive_stack const &) = delete;
+  intrusive_stack &operator=(intrusive_stack &&) = delete;
+
+  constexpr intrusive_stack() noexcept = default;
+
+  bool empty() const noexcept {
+    return top_.load(std::memory_order_acquire) == nullptr;
+  }
+
+  void push(node *n) noexcept {
+    node *old_top = top_.load(std::memory_order_acquire);
+    do {
+      n->next.store(old_top, std::memory_order_relaxed);
+    } while (!top_.compare_exchange_weak(old_top, n, std::memory_order_release
+                                                   , std::memory_order_acquire));
+  }
+
+  node *pop() noexcept {
+    node *old_top = top_.load(std::memory_order_acquire);
+    do {
+      if (old_top == nullptr) {
+        return nullptr;
+      }
+    } while (!top_.compare_exchange_weak(old_top, old_top->next.load(std::memory_order_relaxed)
+                                                , std::memory_order_release
+                                                , std::memory_order_acquire));
+    return old_top;
+  }
+};
+
+LIBCONCUR_NAMESPACE_END_
diff --git a/include/libimp/aligned.h b/include/libimp/aligned.h
new file mode 100644
index 00000000..6dfb4ed1
--- /dev/null
+++ b/include/libimp/aligned.h
@@ -0,0 +1,75 @@
+/**
+ * \file libimp/aligned.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Defines the type suitable for use as uninitialized storage for types of given type.
+ * \date 2023-05-20
+ */
+#pragma once
+
+#include <array>
+
+#include "libimp/def.h"
+#include "libimp/byte.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief The type suitable for use as uninitialized storage for types of given type.
+ *        std::aligned_storage is deprecated in C++23, so we define our own.
+ * \tparam T The type to be aligned.
+ * \tparam AlignT The alignment of the type.
+ * \see https://en.cppreference.com/w/cpp/types/aligned_storage
+ *      https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p1413r3.pdf
+ */
+template <typename T, std::size_t AlignT = alignof(T)>
+class aligned {
+  alignas(AlignT) std::array<::LIBIMP::byte, sizeof(T)> storage_;
+
+public:
+  /**
+   * \brief Returns a pointer to the aligned storage.
+   * \return A pointer to the aligned storage.
+   */
+  T *ptr() noexcept {
+    return reinterpret_cast<T *>(storage_.data());
+  }
+
+  /**
+   * \brief Returns a pointer to the aligned storage.
+   * \return A pointer to the aligned storage.
+   */
+  T const *ptr() const noexcept {
+    return reinterpret_cast<const T *>(storage_.data());
+  }
+
+  /**
+   * \brief Returns a reference to the aligned storage.
+   * \return A reference to the aligned storage.
+   */
+  T &ref() noexcept {
+    return *ptr();
+  }
+
+  /**
+   * \brief Returns a reference to the aligned storage.
+   * \return A reference to the aligned storage.
+   */
+  T const &ref() const noexcept {
+    return *ptr();
+  }
+};
+
+/**
+ * \brief Rounds up the given value to the given alignment.
+ * \tparam T The type of the value.
+ * \param value The value to be rounded up.
+ * \param alignment The alignment to be rounded up to.
+ * \return The rounded up value.
+ * \see https://stackoverflow.com/questions/3407012/c-rounding-up-to-the-nearest-multiple-of-a-number
+*/
+template <typename T>
+constexpr T round_up(T value, T alignment) noexcept {
+  return (value + alignment - 1) & ~(alignment - 1);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/byte.h b/include/libimp/byte.h
new file mode 100644
index 00000000..eb4400f6
--- /dev/null
+++ b/include/libimp/byte.h
@@ -0,0 +1,180 @@
+/**
+ * \file libimp/byte.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the byte type.
+ * \date 2022-11-12
+ */
+#pragma once
+
+#include <type_traits>
+#include <cstdint>
+#include <cstddef>  // std::byte (since C++17)
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+#include "libimp/span.h"
+#include "libimp/fmt.h"
+
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_byte)
+#define LIBIMP_CPP_LIB_BYTE_
+#endif // __cpp_lib_byte
+
+LIBIMP_NAMESPACE_BEG_
+
+class byte;
+
+namespace detail {
+
+template <typename T>
+using is_integral = 
+  typename std::enable_if<std::is_integral<T>::value>::type;
+
+template <typename T>
+using is_not_byte = 
+  typename std::enable_if<!std::is_same<
+  typename std::remove_cv<T>::type, byte>::value>::type;
+
+} // namespace detail
+
+/**
+ * \brief A distinct type that implements the concept of byte as specified in the C++ language definition.
+ * \see https://en.cppreference.com/w/cpp/types/byte
+ */
+class byte {
+  std::uint8_t bits_;
+
+public:
+  byte() noexcept = default;
+
+  template <typename T, typename = detail::is_integral<T>>
+  constexpr byte(T v) noexcept
+    : bits_(static_cast<std::uint8_t>(v)) {}
+
+#ifdef LIBIMP_CPP_LIB_BYTE_
+  constexpr byte(std::byte b) noexcept
+    : byte(std::to_integer<std::uint8_t>(b)) {}
+#endif // LIBIMP_CPP_LIB_BYTE_
+
+  template <typename T, typename = detail::is_integral<T>>
+  constexpr operator T() const noexcept {
+    return static_cast<T>(bits_);
+  }
+
+#ifdef LIBIMP_CPP_LIB_BYTE_
+  constexpr operator std::byte() const noexcept {
+    /// \brief C++17 relaxed enum class initialization rules.
+    /// \see https://en.cppreference.com/w/cpp/language/enum#enum_relaxed_init_cpp17
+    return std::byte{bits_};
+  }
+#endif // LIBIMP_CPP_LIB_BYTE_
+
+  friend bool operator==(byte const &lhs, byte const &rhs) noexcept {
+    return lhs.bits_ == rhs.bits_;
+  }
+
+  friend bool operator!=(byte const &lhs, byte const &rhs) noexcept {
+    return !(lhs == rhs);
+  }
+};
+
+/**
+ * \brief Non-member functions.
+ */
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr T to_integer(byte b) noexcept {
+  return T(b);
+}
+
+/// \brief std::operator<<, operator>>
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr byte operator<<(byte b, T shift) noexcept {
+  return byte(to_integer<unsigned>(b) << shift);
+}
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr byte operator>>(byte b, T shift) noexcept {
+  return byte(to_integer<unsigned>(b) >> shift);
+}
+
+/// \brief std::operator<<=, operator>>=
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr byte &operator<<=(byte &b, T shift) noexcept {
+  return b = b << shift;
+}
+
+template <typename T, typename = detail::is_integral<T>>
+constexpr byte &operator>>=(byte &b, T shift) noexcept {
+  return b = b >> shift;
+}
+
+/// \brief std::operator|, operator&, operator^, operator~
+
+constexpr byte operator|(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) | to_integer<unsigned>(r)); }
+constexpr byte operator&(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) & to_integer<unsigned>(r)); }
+constexpr byte operator^(byte l, byte r) noexcept { return byte(to_integer<unsigned>(l) ^ to_integer<unsigned>(r)); }
+constexpr byte operator~(byte b)         noexcept { return byte(~to_integer<unsigned>(b)); }
+
+/// \brief std::operator|=, operator&=, operator^=
+
+constexpr byte &operator|=(byte &l, byte r) noexcept { return l = l | r; }
+constexpr byte &operator&=(byte &l, byte r) noexcept { return l = l & r; }
+constexpr byte &operator^=(byte &l, byte r) noexcept { return l = l ^ r; }
+
+/// \brief Cast pointer to byte*.
+
+template <typename T, typename = detail::is_not_byte<T>>
+byte *byte_cast(T *p) noexcept {
+  return reinterpret_cast<byte *>(p);
+}
+
+template <typename T, typename = detail::is_not_byte<T>>
+byte const *byte_cast(T const *p) noexcept {
+  return reinterpret_cast<byte const *>(p);
+}
+
+/// \brief Cast byte* to a pointer of another type.
+
+template <typename T, typename = detail::is_not_byte<T>>
+T *byte_cast(byte *p) noexcept {
+  if (reinterpret_cast<std::size_t>(p) % alignof(T) != 0) {
+    return nullptr;
+  }
+  return reinterpret_cast<T *>(p);
+}
+
+template <typename T, typename U = typename std::add_const<T>::type, 
+          typename = detail::is_not_byte<T>>
+U *byte_cast(byte const *p) noexcept {
+  if (reinterpret_cast<std::size_t>(p) % alignof(T) != 0) {
+    return nullptr;
+  }
+  return reinterpret_cast<U *>(p);
+}
+
+/// \brief Converts a span into a view of its underlying bytes.
+/// \see https://en.cppreference.com/w/cpp/container/span/as_bytes
+
+template <typename T, 
+          typename Byte = typename std::conditional<std::is_const<T>::value, byte const, byte>::type>
+auto as_bytes(span<T> s) noexcept -> span<Byte> {
+  return {byte_cast(s.data()), s.size_bytes()};
+}
+
+/// \brief Custom defined fmt_to method for imp::fmt
+namespace detail {
+
+inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, ::LIBIMP::byte b) {
+  return ::LIBIMP::to_string(ctx, static_cast<std::uint8_t>(b), "02x");
+}
+
+template <typename T, 
+          typename = std::enable_if_t<std::is_same<std::decay_t<T>, ::LIBIMP::byte>::value>>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, fmt_ref<T> arg) noexcept {
+  return ::LIBIMP::to_string(ctx, static_cast<std::uint8_t>(arg.param), arg.fstr);
+}
+
+} // namespace detail
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/codecvt.h b/include/libimp/codecvt.h
new file mode 100644
index 00000000..09931ddf
--- /dev/null
+++ b/include/libimp/codecvt.h
@@ -0,0 +1,38 @@
+/**
+ * \file libimp/codecvt.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Character set conversion interface.
+ * \date 2022-08-07
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+
+#include "libimp/def.h"
+#include "libimp/export.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief The transform between UTF-8/16/32
+ * 
+ * \param des  The target string pointer can be nullptr
+ * \param dlen The target string length can be 0
+ */
+template <typename CharT, typename CharU>
+LIBIMP_EXPORT std::size_t cvt_cstr(CharT const *src, std::size_t slen, CharU *des, std::size_t dlen) noexcept;
+
+template <typename CharT, typename TraitsT, typename AllocT, 
+          typename CharU, typename TraitsU, typename AllocU>
+void cvt_sstr(std::basic_string<CharT, TraitsT, AllocT> const &src, std::basic_string<CharU, TraitsU, AllocU> &des) {
+  std::size_t dlen = cvt_cstr(src.c_str(), src.size(), (CharU *)nullptr, 0);
+  if (dlen == 0) {
+    des.clear();
+    return;
+  }
+  des.resize(dlen);
+  cvt_cstr(src.c_str(), src.size(), &des[0], des.size());
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/countof.h b/include/libimp/countof.h
new file mode 100644
index 00000000..b35a95c0
--- /dev/null
+++ b/include/libimp/countof.h
@@ -0,0 +1,81 @@
+/**
+ * \file libimp/countof.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Returns the size of the given range.
+ * \date 2022-03-01
+ */
+#pragma once
+
+#include <type_traits>  // std::declval, std::true_type, std::false_type
+#include <cstddef>      // std::size_t
+
+#include "libimp/def.h"
+#include "libimp/generic.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \see https://en.cppreference.com/w/cpp/iterator/size
+*/
+
+namespace detail_countof {
+
+template <typename T>
+struct trait_has_size {
+private:
+  template <typename Type>
+  static std::true_type check(decltype(std::declval<Type>().size())*);
+  template <typename Type>
+  static std::false_type check(...);
+public:
+  using type = decltype(check<T>(nullptr));
+  static constexpr auto value = type::value;
+};
+
+template <typename T>
+struct trait_has_Size {
+private:
+  template <typename Type>
+  static std::true_type check(decltype(std::declval<Type>().Size())*);
+  template <typename Type>
+  static std::false_type check(...);
+public:
+  using type = decltype(check<T>(nullptr));
+  static constexpr auto value = type::value;
+};
+
+template <typename C, bool = trait_has_size<C>::value
+                    , bool = trait_has_Size<C>::value>
+struct trait;
+
+template <typename T, std::size_t N>
+struct trait<T[N], false, false> {
+  static constexpr auto countof(T const (&)[N]) noexcept {
+    return N;
+  }
+};
+
+template <typename C, bool B>
+struct trait<C, true, B> {
+  static constexpr auto countof(C const &c) noexcept(noexcept(c.size())) {
+    return c.size();
+  }
+};
+
+template <typename C>
+struct trait<C, false, true> {
+  static constexpr auto countof(C const &c) noexcept(noexcept(c.Size())) {
+    return c.Size();
+  }
+};
+
+} // namespace detail_countof
+
+template <typename C, 
+          typename T = detail_countof::trait<C>, 
+          typename R = decltype(T::countof(std::declval<C const &>()))>
+constexpr R countof(C const &c) noexcept(noexcept(T::countof(c))) {
+  return T::countof(c);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/dataof.h b/include/libimp/dataof.h
new file mode 100644
index 00000000..baddd065
--- /dev/null
+++ b/include/libimp/dataof.h
@@ -0,0 +1,98 @@
+/**
+ * \file libimp/dataof.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Returns the data pointer of the given range.
+ * \date 2023-05-27
+ */
+#pragma once
+
+#include <type_traits>  // std::declval, std::true_type, std::false_type
+#include <cstddef>      // std::size_t
+
+#include "libimp/def.h"
+#include "libimp/generic.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \see https://en.cppreference.com/w/cpp/iterator/data
+*/
+
+namespace detail_dataof {
+
+template <typename T>
+struct trait_has_data {
+private:
+  template <typename Type>
+  static std::true_type check(decltype(std::declval<Type>().data())*);
+  template <typename Type>
+  static std::false_type check(...);
+public:
+  using type = decltype(check<T>(nullptr));
+  static constexpr auto value = type::value;
+};
+
+template <typename T>
+struct trait_has_Data {
+private:
+  template <typename Type>
+  static std::true_type check(decltype(std::declval<Type>().Data())*);
+  template <typename Type>
+  static std::false_type check(...);
+public:
+  using type = decltype(check<T>(nullptr));
+  static constexpr auto value = type::value;
+};
+
+template <typename C, bool = trait_has_data<C>::value
+                    , bool = trait_has_Data<C>::value>
+struct trait;
+
+template <typename T, std::size_t N>
+struct trait<T[N], false, false> {
+  static constexpr T const *dataof(T const (&arr)[N]) noexcept {
+    return arr;
+  }
+  static constexpr T *dataof(T (&arr)[N]) noexcept {
+    return arr;
+  }
+};
+
+template <typename C, bool B>
+struct trait<C, true, B> {
+  template <typename T>
+  static constexpr auto dataof(T &&c) noexcept(noexcept(c.data())) {
+    return std::forward<T>(c).data();
+  }
+};
+
+template <typename C>
+struct trait<C, false, true> {
+  template <typename T>
+  static constexpr auto dataof(T &&c) noexcept(noexcept(c.Data())) {
+    return std::forward<T>(c).Data();
+  }
+};
+
+template <typename C>
+struct trait<C, false, false> {
+  template <typename T>
+  static constexpr T const *dataof(std::initializer_list<T> il) noexcept {
+    return il.begin();
+  }
+  template <typename T>
+  static constexpr T const *dataof(T const *p) noexcept {
+    return p;
+  }
+};
+
+} // namespace detail_dataof
+
+template <typename C, 
+          typename T = detail_dataof::trait<std::remove_cv_t<std::remove_reference_t<C>>>, 
+          typename R = decltype(T::dataof(std::declval<C>()))>
+constexpr R dataof(C &&c) noexcept(noexcept(T::dataof(std::forward<C>(c)))) {
+  return T::dataof(std::forward<C>(c));
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/def.h b/include/libimp/def.h
new file mode 100644
index 00000000..da61e14a
--- /dev/null
+++ b/include/libimp/def.h
@@ -0,0 +1,20 @@
+/**
+ * \file libimp/def.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the trivial configuration information.
+ * \date 2022-04-23
+ */
+#pragma once
+
+#include <cstddef>
+#include <cstdint>
+
+#define LIBIMP                imp
+#define LIBIMP_NAMESPACE_BEG_ namespace LIBIMP {
+#define LIBIMP_NAMESPACE_END_ }
+
+LIBIMP_NAMESPACE_BEG_
+
+/// \brief Constants.
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/detect_plat.h b/include/libimp/detect_plat.h
new file mode 100644
index 00000000..b6f5ec19
--- /dev/null
+++ b/include/libimp/detect_plat.h
@@ -0,0 +1,227 @@
+/**
+ * \file libimp/detect_plat.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define platform detection related interfaces.
+ * \date 2022-02-27
+ */
+#pragma once
+
+/// \brief OS check.
+
+#if defined(WINCE) || defined(_WIN32_WCE)
+# define LIBIMP_OS_WINCE
+#elif defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
+     (defined(__x86_64) && defined(__MSYS__))
+#define LIBIMP_OS_WIN64
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || \
+      defined(__NT__) || defined(__MSYS__)
+# define LIBIMP_OS_WIN32
+#elif defined(__QNX__) || defined(__QNXNTO__)
+# define LIBIMP_OS_QNX
+#elif defined(__APPLE__)
+# define LIBIMP_OS_APPLE
+#elif defined(ANDROID) || defined(__ANDROID__)
+# define LIBIMP_OS_ANDROID
+#elif defined(__linux__) || defined(__linux)
+# define LIBIMP_OS_LINUX
+#elif defined(_POSIX_VERSION)
+# define LIBIMP_OS_POSIX
+#else
+# error "This OS is unsupported."
+#endif
+
+#if defined(LIBIMP_OS_WIN32) || defined(LIBIMP_OS_WIN64) || \
+    defined(LIBIMP_OS_WINCE)
+# define LIBIMP_OS_WIN
+#endif
+
+/// \brief Compiler check.
+
+#if defined(_MSC_VER)
+# define LIBIMP_CC_MSVC      _MSC_VER
+# define LIBIMP_CC_MSVC_2015 1900
+# define LIBIMP_CC_MSVC_2017 1910
+# define LIBIMP_CC_MSVC_2019 1920
+# define LIBIMP_CC_MSVC_2022 1930
+#elif defined(__GNUC__)
+# define LIBIMP_CC_GNUC __GNUC__
+# if defined(__clang__)
+#   define LIBIMP_CC_CLANG
+#endif
+#else
+# error "This compiler is unsupported."
+#endif
+
+/// \brief Instruction set.
+/// \see https://sourceforge.net/p/predef/wiki/Architectures/
+
+#if defined(_M_X64) || defined(_M_AMD64) || \
+    defined(__x86_64__) || defined(__x86_64) || \
+    defined(__amd64__) || defined(__amd64)
+# define LIBIMP_INSTR_X64
+#elif defined(_M_IA64) || defined(__IA64__) || defined(_IA64) || \
+      defined(__ia64__) || defined(__ia64)
+# define LIBIMP_INSTR_I64
+#elif defined(_M_IX86) || defined(_X86_) || defined(__i386__) || defined(__i386)
+# define LIBIMP_INSTR_X86
+#elif defined(_M_ARM64) || defined(__arm64__) || defined(__aarch64__)
+# define LIBIMP_INSTR_ARM64
+#elif defined(_M_ARM) || defined(_ARM) || defined(__arm__) || defined(__arm)
+# define LIBIMP_INSTR_ARM32
+#else
+# error "This instruction set is unsupported."
+#endif
+
+#if defined(LIBIMP_INSTR_X86) || defined(LIBIMP_INSTR_X64)
+# define LIBIMP_INSTR_X86_64
+#elif defined(LIBIMP_INSTR_ARM32) || defined(LIBIMP_INSTR_ARM64)
+# define LIBIMP_INSTR_ARM
+#endif
+
+/// \brief Byte order.
+
+#if defined(__BYTE_ORDER__)
+# define LIBIMP_ENDIAN_BIG   (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+# define LIBIMP_ENDIAN_LIT   (!LIBIMP_ENDIAN_BIG)
+#else
+# define LIBIMP_ENDIAN_BIG   (0)
+# define LIBIMP_ENDIAN_LIT   (1)
+#endif
+
+/// \brief C++ version.
+
+#if (__cplusplus >= 202002L) && !defined(LIBIMP_CPP_20)
+# define LIBIMP_CPP_20
+#endif
+#if (__cplusplus >= 201703L) && !defined(LIBIMP_CPP_17)
+# define LIBIMP_CPP_17
+#endif
+#if /*(__cplusplus >= 201402L) &&*/ !defined(LIBIMP_CPP_14)
+# define LIBIMP_CPP_14
+#endif
+
+#if !defined(LIBIMP_CPP_20) && \
+    !defined(LIBIMP_CPP_17) && \
+    !defined(LIBIMP_CPP_14)
+# error "This C++ version is unsupported."
+#endif
+
+/// \brief Feature cross-platform adaptation.
+
+#if defined(LIBIMP_CPP_17)
+# define LIBIMP_INLINE_CONSTEXPR inline constexpr
+#else
+# define LIBIMP_INLINE_CONSTEXPR constexpr
+#endif
+
+/// \brief C++ attributes.
+/// \see https://en.cppreference.com/w/cpp/language/attributes
+
+#if defined(__has_cpp_attribute)
+# if __has_cpp_attribute(fallthrough)
+#   define LIBIMP_FALLTHROUGH [[fallthrough]]
+# endif
+# if __has_cpp_attribute(maybe_unused)
+#   define LIBIMP_UNUSED [[maybe_unused]]
+# endif
+# if __has_cpp_attribute(likely)
+#   define LIBIMP_LIKELY(...) (__VA_ARGS__) [[likely]]
+# endif
+# if __has_cpp_attribute(unlikely)
+#   define LIBIMP_UNLIKELY(...) (__VA_ARGS__) [[unlikely]]
+# endif
+# if __has_cpp_attribute(nodiscard)
+#   define LIBIMP_NODISCARD [[nodiscard]]
+# endif
+# if __has_cpp_attribute(assume)
+#   define LIBIMP_ASSUME(...) [[assume(__VA_ARGS__)]]
+# endif
+#endif
+
+#if !defined(LIBIMP_FALLTHROUGH)
+# if defined(LIBIMP_CC_GNUC)
+#   define LIBIMP_FALLTHROUGH __attribute__((__fallthrough__))
+# else
+#   define LIBIMP_FALLTHROUGH
+# endif
+#endif
+
+#if !defined(LIBIMP_UNUSED)
+# if defined(LIBIMP_CC_GNUC)
+#   define LIBIMP_UNUSED __attribute__((__unused__))
+# elif defined(LIBIMP_CC_MSVC)
+#   define LIBIMP_UNUSED __pragma(warning(suppress: 4100 4101 4189))
+# else
+#   define LIBIMP_UNUSED
+# endif
+#endif
+
+#if !defined(LIBIMP_LIKELY)
+# if defined(__has_builtin)
+#   if __has_builtin(__builtin_expect)
+#     define LIBIMP_LIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 1))
+#   endif
+# endif
+#endif
+
+#if !defined(LIBIMP_LIKELY)
+# define LIBIMP_LIKELY(...) (__VA_ARGS__)
+#endif
+
+#if !defined(LIBIMP_UNLIKELY)
+# if defined(__has_builtin)
+#   if __has_builtin(__builtin_expect)
+#     define LIBIMP_UNLIKELY(...) (__builtin_expect(!!(__VA_ARGS__), 0))
+#   endif
+# endif
+#endif
+
+#if !defined(LIBIMP_UNLIKELY)
+# define LIBIMP_UNLIKELY(...) (__VA_ARGS__)
+#endif
+
+#if !defined(LIBIMP_NODISCARD)
+/// \see https://stackoverflow.com/questions/4226308/msvc-equivalent-of-attribute-warn-unused-result
+# if defined(LIBIMP_CC_GNUC) && (LIBIMP_CC_GNUC >= 4)
+#   define LIBIMP_NODISCARD __attribute__((warn_unused_result))
+# elif defined(LIBIMP_CC_MSVC) && (LIBIMP_CC_MSVC >= 1700)
+#   define LIBIMP_NODISCARD _Check_return_
+# else
+#   define LIBIMP_NODISCARD
+# endif
+#endif
+
+#if !defined(LIBIMP_ASSUME)
+# if defined(__has_builtin)
+#   if __has_builtin(__builtin_assume)
+      /// \see https://clang.llvm.org/docs/LanguageExtensions.html#langext-builtin-assume
+#     define LIBIMP_ASSUME(...) __builtin_assume(__VA_ARGS__)
+#   elif __has_builtin(__builtin_unreachable)
+      /// \see https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005funreachable
+#     define LIBIMP_ASSUME(...) do { if (!(__VA_ARGS__)) __builtin_unreachable(); } while (false)
+#   endif
+# endif
+#endif
+
+#if !defined(LIBIMP_ASSUME)
+# if defined(LIBIMP_CC_MSVC)
+    /// \see https://learn.microsoft.com/en-us/cpp/intrinsics/assume?view=msvc-140
+#   define LIBIMP_ASSUME(...) __assume(__VA_ARGS__)
+# else
+#   define LIBIMP_ASSUME(...)
+# endif
+#endif
+
+/// \see https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_exceptions.html
+///      https://learn.microsoft.com/en-us/cpp/preprocessor/predefined-macros
+///      https://stackoverflow.com/questions/6487013/programmatically-determine-whether-exceptions-are-enabled
+#if defined(__cpp_exceptions) && __cpp_exceptions || \
+    defined(__EXCEPTIONS) || defined(_CPPUNWIND)
+# define LIBIMP_TRY                    try
+# define LIBIMP_CATCH(...)             catch (__VA_ARGS__)
+# define LIBIMP_THROW($EXCEPTION, ...) throw $EXCEPTION
+#else
+# define LIBIMP_TRY                    if (true)
+# define LIBIMP_CATCH(...)             else if (false)
+# define LIBIMP_THROW($EXCEPTION, ...) return __VA_ARGS__
+#endif
diff --git a/include/libimp/error.h b/include/libimp/error.h
new file mode 100644
index 00000000..ff7fb67e
--- /dev/null
+++ b/include/libimp/error.h
@@ -0,0 +1,29 @@
+/**
+ * \file libimp/error.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A platform-dependent error code.
+ * \date 2022-12-18
+ */
+#pragma once
+
+#include <system_error>
+#include <string>
+#include <cstdint>
+
+#include "libimp/def.h"
+#include "libimp/export.h"
+#include "libimp/fmt_cpo.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief Custom defined fmt_to method for imp::fmt
+ */
+namespace detail {
+
+inline bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, std::error_code const &ec) noexcept {
+  return fmt_to(ctx, '[', ec.value(), ": ", ec.message(), ']');
+}
+
+} // namespace detail
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/expected.h b/include/libimp/expected.h
new file mode 100644
index 00000000..8ffbdff0
--- /dev/null
+++ b/include/libimp/expected.h
@@ -0,0 +1,394 @@
+/**
+ * \file libimp/expected.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Provides a way to store either of two values.
+ * \date 2023-02-05
+ */
+#pragma once
+
+#include <type_traits>
+#include <utility>  // std::exchange
+#include <array>
+#include <memory>   // std::addressof
+#include <cstddef>  // std::nullptr_t
+
+#include "libimp/def.h"
+#include "libimp/uninitialized.h"
+#include "libimp/generic.h"
+#include "libimp/byte.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief In-place construction tag for unexpected value in expected.
+ * \see https://en.cppreference.com/w/cpp/utility/expected/unexpect_t
+ */
+struct unexpected_t {
+  explicit unexpected_t() = default;
+};
+constexpr unexpected_t unexpected {};
+
+/**
+ * \class template <typename T, typename E> expected
+ * \brief Provides a way to store either of two values.
+ * \see https://en.cppreference.com/w/cpp/utility/expected
+ * \tparam T - the type of the expected value.
+ * \tparam E - the type of the unexpected value.
+ */
+template <typename T, typename E>
+class expected;
+
+namespace detail_expected {
+
+template <typename T, typename E>
+struct data_union {
+  using const_value_t = typename std::add_const<T>::type;
+  using const_error_t = typename std::add_const<E>::type;
+
+  union {
+    T value_;  ///< the expected value
+    E error_;  ///< the unexpected value
+  };
+
+  data_union(data_union const &) = delete;
+  data_union &operator=(data_union const &) = delete;
+
+  data_union(std::nullptr_t) noexcept {}
+  ~data_union() {}
+
+  template <typename... A>
+  data_union(in_place_t, A &&...args) : value_{std::forward<A>(args)...} {}
+  template <typename... A>
+  data_union(unexpected_t, A &&...args) : error_{std::forward<A>(args)...} {}
+
+  void destruct_value() noexcept { destroy(&value_); }
+  void destruct_error() noexcept { destroy(&error_); }
+
+  const_value_t & value() const &  noexcept { return value_; }
+  T &             value() &        noexcept { return value_; }
+  const_value_t &&value() const && noexcept { return std::move(value_); }
+  T &&            value() &&       noexcept { return std::move(value_); }
+
+  const_error_t & error() const &  noexcept { return error_; }
+  E &             error() &        noexcept { return error_; }
+  const_error_t &&error() const && noexcept { return std::move(error_); }
+  E &&            error() &&       noexcept { return std::move(error_); }
+};
+
+template <typename E>
+struct data_union<void, E> {
+  using const_error_t = typename std::add_const<E>::type;
+
+  alignas(E) std::array<byte, sizeof(E)> error_;  ///< the unexpected value
+
+  data_union(data_union const &) = delete;
+  data_union &operator=(data_union const &) = delete;
+
+  data_union(std::nullptr_t) noexcept {}
+
+  template <typename... A>
+  data_union(in_place_t, A &&...) noexcept {}
+  template <typename... A>
+  data_union(unexpected_t, A &&...args) {
+    construct<E>(&error_, std::forward<A>(args)...);
+  }
+
+  void destruct_value() noexcept {}
+  void destruct_error() noexcept { destroy(reinterpret_cast<E *>(&error_)); }
+
+  const_error_t & error() const &  noexcept { return *reinterpret_cast<E *>(error_.data()); }
+  E &             error() &        noexcept { return *reinterpret_cast<E *>(error_.data()); }
+  const_error_t &&error() const && noexcept { return std::move(*reinterpret_cast<E *>(error_.data())); }
+  E &&            error() &&       noexcept { return std::move(*reinterpret_cast<E *>(error_.data())); }
+};
+
+template <typename T, typename E>
+auto destruct(bool /*has_value*/, data_union<T, E> &/*data*/) noexcept
+  -> typename std::enable_if<std::is_trivially_destructible<T>::value &&
+                             std::is_trivially_destructible<E>::value>::type {
+  // Do nothing.
+}
+
+template <typename T, typename E>
+auto destruct(bool has_value, data_union<T, E> &data) noexcept
+  -> typename std::enable_if<!std::is_trivially_destructible<T>::value &&
+                              std::is_trivially_destructible<E>::value>::type {
+  if (has_value) data.destruct_value();
+}
+
+template <typename T, typename E>
+auto destruct(bool has_value, data_union<T, E> &data) noexcept
+  -> typename std::enable_if< std::is_trivially_destructible<T>::value &&
+                             !std::is_trivially_destructible<E>::value>::type {
+  if (!has_value) data.destruct_error();
+}
+
+template <typename T, typename E>
+auto destruct(bool has_value, data_union<T, E> &data) noexcept
+  -> typename std::enable_if<!std::is_trivially_destructible<T>::value &&
+                             !std::is_trivially_destructible<E>::value>::type {
+  if (has_value) {
+    data.destruct_value();
+  } else {
+    data.destruct_error();
+  }
+}
+
+template <typename S, typename T, typename E>
+struct value_getter : data_union<T, E> {
+  using data_union<T, E>::data_union;
+
+  template <typename U>
+  value_getter(U &&other) : data_union<T, E>(nullptr) {
+    if (other) {
+      construct<data_union<T, E>>(this, in_place, std::forward<U>(other).value());
+    } else {
+      construct<data_union<T, E>>(this, unexpected, std::forward<U>(other).error());
+    }
+  }
+
+  T const *operator->() const noexcept { return std::addressof(this->value()); }
+  T *      operator->()       noexcept { return std::addressof(this->value()); }
+
+  T const & operator*() const &  noexcept { return this->value(); }
+  T &       operator*()       &  noexcept { return this->value(); }
+  T const &&operator*() const && noexcept { return std::move(this->value()); }
+  T &&      operator*()       && noexcept { return std::move(this->value()); }
+
+  template <typename U>
+  T value_or(U &&def) const & {
+    return bool(*static_cast<S *>(this)) ? **this : static_cast<T>(std::forward<U>(def));
+  }
+  template <typename U>
+  T value_or(U &&def) && {
+    return bool(*static_cast<S *>(this)) ? std::move(**this) : static_cast<T>(std::forward<U>(def));
+  }
+
+  template <typename... A>
+  T &emplace(A &&...args) {
+    static_cast<S *>(this)->reconstruct(in_place, std::forward<A>(args)...);
+    return this->value();
+  }
+
+  void swap(S &other) {
+    if (bool(*static_cast<S *>(this)) && bool(other)) {
+      std::swap(this->value(), other.value());
+    } else if (!*static_cast<S *>(this) && !other) {
+      std::swap(this->error(), other.error());
+    } else if (!*static_cast<S *>(this) && bool(other)) {
+      E err(std::move(this->error()));
+      this->emplace(std::move(other.value()));
+      other.reconstruct(unexpected, std::move(err));
+    } else /*if (bool(*this) && !other)*/ {
+      E err(std::move(other.error()));
+      other.emplace(std::move(this->value()));
+      static_cast<S *>(this)->reconstruct(unexpected, std::move(err));
+    }
+  }
+};
+
+template <typename S, typename E>
+struct value_getter<S, void, E> : data_union<void, E> {
+  using data_union<void, E>::data_union;
+
+  template <typename U>
+  value_getter(U &&other) : data_union<void, E>(nullptr) {
+    if (other) {
+      construct<data_union<void, E>>(this, in_place);
+    } else {
+      construct<data_union<void, E>>(this, unexpected, std::forward<U>(other).error());
+    }
+  }
+
+  void emplace() noexcept {
+    static_cast<S *>(this)->reconstruct(in_place);
+  }
+
+  void swap(S &other) {
+    if (bool(*static_cast<S *>(this)) && bool(other)) {
+      return;
+    } else if (!*static_cast<S *>(this) && !other) {
+      std::swap(this->error(), other.error());
+    } else if (!*static_cast<S *>(this) && bool(other)) {
+      E err(std::move(this->error()));
+      this->emplace();
+      other.reconstruct(unexpected, std::move(err));
+    } else /*if (bool(*this) && !other)*/ {
+      E err(std::move(other.error()));
+      other.emplace();
+      static_cast<S *>(this)->reconstruct(unexpected, std::move(err));
+    }
+  }
+};
+
+/**
+ * \brief Define the expected storage.
+ */
+template <typename T, typename E>
+struct storage : value_getter<storage<T, E>, T, E> {
+  using getter_t = value_getter<storage<T, E>, T, E>;
+
+  bool has_value_;
+
+  template <typename... A>
+  storage(in_place_t, A &&...args)
+    : getter_t(in_place, std::forward<A>(args)...)
+    , has_value_(true) {}
+
+  template <typename... A>
+  storage(unexpected_t, A &&...args)
+    : getter_t(unexpected, std::forward<A>(args)...)
+    , has_value_(false) {}
+
+  storage(storage const &other)
+    : getter_t(other)
+    , has_value_(other.has_value_) {}
+
+  storage(storage &&other)
+    : getter_t(std::move(other))
+    /// After construction, has_value() is equal to other.has_value().
+    , has_value_(other.has_value_) {}
+
+  template <typename T_, typename E_>
+  storage(storage<T_, E_> const &other)
+    : getter_t(other)
+    , has_value_(other.has_value_) {}
+
+  template <typename T_, typename E_>
+  storage(storage<T_, E_> &&other)
+    : getter_t(std::move(other))
+    /// After construction, has_value() is equal to other.has_value().
+    , has_value_(other.has_value_) {}
+
+  bool has_value() const noexcept {
+    return has_value_;
+  }
+
+  explicit operator bool() const noexcept {
+    return this->has_value();
+  }
+
+protected:
+  friend getter_t;
+
+  template <typename... A>
+  void reconstruct(A &&...args) {
+    destroy(this);
+    construct<storage>(this, std::forward<A>(args)...);
+  }
+};
+
+/// \brief The invoke forwarding helper.
+
+template <typename F, typename... A>
+auto invoke(F &&f, A &&...args) noexcept(
+     noexcept(std::forward<F>(f)(std::forward<A>(args)...)))
+  -> decltype(std::forward<F>(f)(std::forward<A>(args)...)) {
+  return std::forward<F>(f)(std::forward<A>(args)...);
+}
+
+template <typename F, typename... A>
+auto invoke(F &&f, A &&...args) noexcept(
+     noexcept(std::forward<F>(f)()))
+  -> decltype(std::forward<F>(f)()) {
+  return std::forward<F>(f)();
+}
+
+/// \brief and_then helper.
+
+template <typename E, typename F,
+          typename R = decltype(invoke(std::declval<F>(), *std::declval<E>()))>
+R and_then(E &&exp, F &&f) {
+  static_assert(is_specialized<expected, R>::value, "F must return an `expected`.");
+  return bool(exp) ? invoke(std::forward<F>(f), *std::forward<E>(exp))
+                   : R(unexpected, std::forward<E>(exp).error());
+}
+
+/// \brief or_else helper.
+
+template <typename E, typename F,
+          typename R = decltype(invoke(std::declval<F>(), std::declval<E>().error()))>
+R or_else(E &&exp, F &&f) {
+  static_assert(is_specialized<expected, R>::value, "F must return an `expected`.");
+  return bool(exp) ? std::forward<E>(exp)
+                   : invoke(std::forward<F>(f), std::forward<E>(exp).error());
+}
+
+} // namespace detail_expected
+
+/**
+ * \class template <typename T, typename E> expected
+ * \brief Provides a way to store either of two values.
+ */
+template <typename T, typename E>
+class expected : public detail_expected::storage<typename std::remove_cv<T>::type, E> {
+public:
+  using value_type = typename std::remove_cv<T>::type;
+  using error_type = E;
+
+  using detail_expected::storage<value_type, E>::storage;
+
+  expected(expected const &) = default;
+  expected(expected &&) = default;
+
+  expected()
+    : detail_expected::storage<value_type, E>(in_place) {}
+
+  expected &operator=(expected other) {
+    this->swap(other);
+    return *this;
+  }
+
+  // Monadic operations
+
+  template <typename F>
+  auto and_then(F &&f) & {
+    return detail_expected::and_then(*this, std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto and_then(F &&f) const & {
+    return detail_expected::and_then(*this, std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto and_then(F &&f) && {
+    return detail_expected::and_then(std::move(*this), std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto or_else(F &&f) & {
+    return detail_expected::or_else(*this, std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto or_else(F &&f) const & {
+    return detail_expected::or_else(*this, std::forward<F>(f));
+  }
+
+  template <typename F>
+  auto or_else(F &&f) && {
+    return detail_expected::or_else(std::move(*this), std::forward<F>(f));
+  }
+};
+
+// Compares
+
+template <typename T1, typename E1, typename T2, typename E2>
+bool operator==(expected<T1, E1> const &lhs, expected<T2, E2> const &rhs) {
+  return (lhs.has_value() == rhs.has_value())
+      && (lhs.has_value() ? *lhs == *rhs : lhs.error() == rhs.error());
+}
+
+template <typename E1, typename E2>
+bool operator==(expected<void, E1> const &lhs, expected<void, E2> const &rhs) {
+  return (lhs.has_value() == rhs.has_value())
+      && (lhs.has_value() || lhs.error() == rhs.error());
+}
+
+template <typename T1, typename E1, typename T2, typename E2>
+bool operator!=(expected<T1, E1> const &lhs, expected<T2, E2> const &rhs) {
+  return !(lhs == rhs);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/export.h b/include/libimp/export.h
new file mode 100644
index 00000000..f12d452a
--- /dev/null
+++ b/include/libimp/export.h
@@ -0,0 +1,46 @@
+/**
+ * \file libimp/export.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the symbol export interfaces.
+ * \date 2022-02-27
+ */
+#pragma once
+
+#include "libimp/detect_plat.h"
+
+#if defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
+
+# define LIBIMP_DECL_EXPORT Q_DECL_EXPORT
+# define LIBIMP_DECL_IMPORT Q_DECL_IMPORT
+
+#else // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
+
+/**
+ * \brief Compiler & system detection for LIBIMP_DECL_EXPORT & LIBIMP_DECL_IMPORT.
+ * Not using QtCore cause it shouldn't depend on Qt.
+ */
+# if defined(LIBIMP_CC_MSVC) || defined(LIBIMP_OS_WIN)
+#   define LIBIMP_DECL_EXPORT __declspec(dllexport)
+#   define LIBIMP_DECL_IMPORT __declspec(dllimport)
+# elif defined(LIBIMP_OS_ANDROID) || defined(LIBIMP_OS_LINUX) || defined(LIBIMP_CC_GNUC)
+#   define LIBIMP_DECL_EXPORT __attribute__((visibility("default")))
+#   define LIBIMP_DECL_IMPORT __attribute__((visibility("default")))
+# else
+#   define LIBIMP_DECL_EXPORT __attribute__((visibility("default")))
+#   define LIBIMP_DECL_IMPORT __attribute__((visibility("default")))
+# endif
+
+#endif // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
+
+/**
+ * \brief Define LIBIMP_EXPORT for exporting function & class.
+ */
+#ifndef LIBIMP_EXPORT
+# if defined(LIBIMP_LIBRARY_SHARED_BUILDING__)
+#   define LIBIMP_EXPORT LIBIMP_DECL_EXPORT
+# elif defined(LIBIMP_LIBRARY_SHARED_USING__)
+#   define LIBIMP_EXPORT LIBIMP_DECL_IMPORT
+# else
+#   define LIBIMP_EXPORT
+# endif
+#endif /*LIBIMP_EXPORT*/
diff --git a/include/libimp/fmt.h b/include/libimp/fmt.h
new file mode 100644
index 00000000..06d53743
--- /dev/null
+++ b/include/libimp/fmt.h
@@ -0,0 +1,178 @@
+/**
+ * \file libimp/fmt.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief String formatting.
+ * \date 2022-11-26
+ * 
+ * \remarks The current performance is not high, 
+ * because I use std::sprintf directly for formatting for convenience.
+ */
+#pragma once
+
+#include <string>
+#include <utility>
+#include <type_traits>
+#include <chrono>   // std::chrono::time_point
+#include <tuple>
+#include <cstddef>
+#include <ctime>    // std::tm, std::localtime
+
+#include "libimp/def.h"
+#include "libimp/fmt_cpo.h"
+#include "libimp/span.h"
+#include "libimp/detect_plat.h"
+#include "libimp/export.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief The format string reference wrapper.
+ */
+template <typename T>
+struct fmt_ref {
+  span<char const> fstr;
+  T param;
+};
+
+/**
+ * \brief Conversion specifiers.
+ * 
+ * \remarks Just like printf, the format string is of the form
+ * [flags][field_width][.precision][conversion_character]
+ * 
+ * \see http://personal.ee.surrey.ac.uk/Personal/R.Bowden/C/printf.html
+ */
+template <std::size_t N>
+auto spec(char const (&fstr)[N]) noexcept {
+  return [&fstr](auto &&arg) noexcept {
+    using arg_t = decltype(arg);
+    return fmt_ref<arg_t> {{fstr}, static_cast<arg_t>(arg)};
+  };
+}
+
+/**
+ * \brief String formatting function.
+ * 
+ * \param args arguments that support the fmt output
+ * \return an empty string if the fmt output fails 
+ */
+template <typename... A>
+LIBIMP_NODISCARD std::string fmt(A &&...args) {
+  std::string joined;
+  fmt_context ctx(joined);
+  if (fmt_to(ctx, std::forward<A>(args)...)) {
+    return ctx.finish() ? joined : "";
+  }
+  return {};
+}
+
+/// \brief String types.
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char const *       a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::string const &a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char const *       a, span<char const> fstr) noexcept;
+       inline bool to_string(fmt_context &ctx, std::string const &a, span<char const> fstr) noexcept { return to_string(ctx, a.c_str(), fstr); }
+
+/// \brief Character to string conversion.
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char     a) noexcept;
+#if defined(LIBIMP_CPP_20)
+       inline bool to_string(fmt_context &ctx, char8_t  a) noexcept { return to_string(ctx, (char)a); }
+#endif // defined(LIBIMP_CPP_20)
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, wchar_t  a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char16_t a) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, char32_t a) noexcept;
+
+/// \brief Conversion of numeric types to strings.
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed short     a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned short     a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed int       a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned int       a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed long      a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned long      a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,   signed long long a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, unsigned long long a, span<char const> fstr = {}) noexcept;
+       inline bool to_string(fmt_context &ctx,   signed char      a, span<char const> fstr = {}) noexcept { return to_string(ctx,      (int)a, fstr); }
+       inline bool to_string(fmt_context &ctx, unsigned char      a, span<char const> fstr = {}) noexcept { return to_string(ctx, (unsigned)a, fstr); }
+
+/// \brief Conversion of floating point type to strings.
+LIBIMP_EXPORT bool to_string(fmt_context &ctx,      double a, span<char const> fstr = {}) noexcept;
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, long double a, span<char const> fstr = {}) noexcept;
+       inline bool to_string(fmt_context &ctx, float       a, span<char const> fstr = {}) noexcept { return to_string(ctx, (double)a, fstr); }
+
+/// \brief Pointer.
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::nullptr_t) noexcept;
+template <typename T,
+          typename = std::enable_if_t<std::is_same<T, void>::value>>
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, T const volatile *a) noexcept;
+
+/// \brief Date and time.
+LIBIMP_EXPORT bool to_string(fmt_context &ctx, std::tm const &a, span<char const> fstr = {}) noexcept;
+
+namespace detail {
+
+/**
+ * \brief Convert std::time_t to std::string.
+ * \return an empty string if the conversion fails
+ */
+inline bool time_to_string(fmt_context &ctx, std::time_t tt, span<char const> fstr) noexcept {
+#if defined(LIBIMP_CC_MSVC)
+  /// \see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/localtime-s-localtime32-s-localtime64-s
+  std::tm tm {};
+  if (::localtime_s(&tm, &tt) != 0) {
+    return {};
+  }
+  return to_string(ctx, tm, fstr);
+#else
+  return to_string(ctx, *std::localtime(&tt), fstr);
+#endif
+}
+
+} // namespace detail
+
+template <class Clock, class Duration>
+bool to_string(fmt_context &ctx, std::chrono::time_point<Clock, Duration> const &a, span<char const> fstr = {}) noexcept {
+  return detail::time_to_string(ctx, std::chrono::system_clock::to_time_t(a), fstr);
+}
+
+/**
+ * \brief Predefined fmt_to method
+ */
+namespace detail {
+
+template <typename T>
+auto tag_invoke(fmt_to_t, fmt_context &ctx, T &&arg) noexcept
+  -> decltype(::LIBIMP::to_string(ctx, std::forward<T>(arg))) {
+  return ::LIBIMP::to_string(ctx, std::forward<T>(arg));
+}
+
+template <typename T>
+auto tag_invoke(fmt_to_t, fmt_context &ctx, fmt_ref<T> arg) noexcept
+  -> decltype(::LIBIMP::to_string(ctx, static_cast<T>(arg.param), arg.fstr)) {
+  return ::LIBIMP::to_string(ctx, static_cast<T>(arg.param), arg.fstr);
+}
+
+template <typename T>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, span<T> s) {
+  if (s.empty()) {
+    return false;
+  }
+  if (!fmt_to(ctx, s[0])) {
+    return false;
+  }
+  for (std::size_t i = 1; i < s.size(); ++i) {
+    if (!fmt_to(ctx, ' ', s[i])) return false;
+  }
+  return true;
+}
+
+template <typename Tp, std::size_t... I>
+bool unfold_tuple_fmt_to(fmt_context &ctx, Tp const &tp, std::index_sequence<I...>) {
+  return fmt_to(ctx, std::get<I>(tp)...);
+}
+
+template <typename... T>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, std::tuple<T...> const &tp) {
+  return unfold_tuple_fmt_to(ctx, tp, std::index_sequence_for<T...>{});
+}
+
+} // namespace detail
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/fmt_cpo.h b/include/libimp/fmt_cpo.h
new file mode 100644
index 00000000..6cf9e4ef
--- /dev/null
+++ b/include/libimp/fmt_cpo.h
@@ -0,0 +1,68 @@
+/**
+ * \file libimp/fmt_cpo.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief String formatting CPO.
+ * \date 2022-11-28
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+#include <array>
+
+#include "libimp/def.h"
+#include "libimp/generic.h"
+#include "libimp/detect_plat.h"
+#include "libimp/span.h"
+#include "libimp/export.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \class class LIBIMP_EXPORT fmt_context
+ * \brief The context of fmt.
+ */
+class LIBIMP_EXPORT fmt_context {
+  std::array<char, 2048U> sbuf_; ///< stack buffer
+
+  std::string &joined_;
+  std::size_t  offset_;
+
+public:
+  fmt_context(std::string &j) noexcept;
+
+  std::size_t capacity() noexcept;
+  void reset() noexcept;
+  bool finish() noexcept;
+  span<char> buffer(std::size_t sz) noexcept;
+  void expend(std::size_t sz) noexcept;
+  bool append(span<char const> const &str) noexcept;
+};
+
+/// \brief Supports custom fmt_to methods for imp::fmt.
+namespace detail {
+
+class fmt_to_t {
+  template <typename A1>
+  bool get_result(fmt_context &ctx, A1 && a1) const {
+    return ::LIBIMP::tag_invoke(fmt_to_t{}, ctx, std::forward<A1>(a1));
+  }
+
+  template <typename A1, typename... A>
+  bool get_result(fmt_context &ctx, A1 && a1, A &&...args) const {
+    return get_result(ctx, std::forward<A1>(a1))
+        && get_result(ctx, std::forward<A>(args)...);
+  }
+
+public:
+  template <typename... A>
+  bool operator()(fmt_context &ctx, A &&...args) const {
+    return get_result(ctx, std::forward<A>(args)...);
+  }
+};
+
+} // namespace detail
+
+constexpr detail::fmt_to_t fmt_to {};
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/generic.h b/include/libimp/generic.h
new file mode 100644
index 00000000..2106adcc
--- /dev/null
+++ b/include/libimp/generic.h
@@ -0,0 +1,131 @@
+/**
+ * \file libimp/generic.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Tools for generic programming.
+ * \date 2022-03-01
+ */
+#pragma once
+
+#include <utility>
+#include <type_traits>
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief Utility metafunction that maps a sequence of any types to the type void
+ * \see https://en.cppreference.com/w/cpp/types/void_t
+ */
+template <typename...>
+using void_t = void;
+
+/**
+ * \brief A type-list for generic programming.
+*/
+template <typename...>
+struct types {};
+
+/**
+ * \brief To indicate that the contained object should be constructed in-place.
+ * \see https://en.cppreference.com/w/cpp/utility/in_place
+ */
+#if defined(LIBIMP_CPP_17)
+using std::in_place_t;
+using std::in_place;
+#else /*!LIBIMP_CPP_17*/
+struct in_place_t {
+  explicit in_place_t() = default;
+};
+constexpr in_place_t in_place {};
+#endif/*!LIBIMP_CPP_17*/
+
+/**
+ * \brief A general pattern for supporting customisable functions
+ * \see https://www.open-std.org/jtc1/sc22/WG21/docs/papers/2019/p1895r0.pdf
+ */
+namespace detail {
+
+void tag_invoke();
+
+struct tag_invoke_t {
+  template <typename T, typename... A>
+  constexpr auto operator()(T tag, A &&...args) const
+    noexcept(noexcept(tag_invoke(std::forward<T>(tag), std::forward<A>(args)...)))
+          -> decltype(tag_invoke(std::forward<T>(tag), std::forward<A>(args)...)) {
+    return tag_invoke(std::forward<T>(tag), std::forward<A>(args)...);
+  }
+};
+
+} // namespace detail
+
+constexpr detail::tag_invoke_t tag_invoke {};
+
+/**
+ * \brief Circumventing forwarding reference may override copy and move constructs.
+ * \see https://mpark.github.io/programming/2014/06/07/beware-of-perfect-forwarding-constructors/
+ */
+namespace detail {
+
+template <typename T, typename... A>
+struct is_same_first : std::false_type {};
+
+template <typename T>
+struct is_same_first<T, T> : std::true_type {};
+
+} // namespace detail
+
+template <typename T, typename... A>
+using not_match = 
+  typename std::enable_if<!detail::is_same_first<T, 
+  typename std::decay<A>::type...>::value, bool>::type;
+
+/**
+ * \brief Determines whether a type is specialized from a particular template.
+ */
+template <template <typename...> class Tt, typename T>
+struct is_specialized : std::false_type {};
+
+template <template <typename...> class Tt, typename... A>
+struct is_specialized<Tt, Tt<A...>> : std::true_type {};
+
+/**
+ * \brief Copy the cv qualifier and reference of the source type to the target type.
+ */
+template <typename Src, typename Des>
+struct copy_cvref {
+  using type = Des;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src const, Des> {
+  using type = typename std::add_const<Des>::type;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src volatile, Des> {
+  using type = typename std::add_volatile<Des>::type;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src const volatile, Des> {
+  using type = typename std::add_cv<Des>::type;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src &, Des> {
+  using type = typename std::add_lvalue_reference<
+               typename copy_cvref<Src, Des>::type>::type;
+};
+
+template <typename Src, typename Des>
+struct copy_cvref<Src &&, Des> {
+  using type = typename std::add_rvalue_reference<
+               typename copy_cvref<Src, Des>::type>::type;
+};
+
+template <typename Src, typename Des>
+using copy_cvref_t = typename copy_cvref<Src, Des>::type;
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/horrible_cast.h b/include/libimp/horrible_cast.h
new file mode 100644
index 00000000..2128ed11
--- /dev/null
+++ b/include/libimp/horrible_cast.h
@@ -0,0 +1,30 @@
+/**
+ * \file libimp/horrible_cast.h
+ * \author mutouyun (orz@orzz.org)
+ * \date 2022-04-17
+ */
+#pragma once
+
+#include <type_traits>  // std::decay_t
+#include <utility>
+
+#include "libimp/def.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+namespace detail_horrible_cast {
+
+template <typename T, typename U>
+union temp {
+  std::decay_t<U> in;
+  T out;
+};
+
+} // namespace detail_horrible_cast
+
+template <typename T, typename U>
+constexpr T horrible_cast(U &&in) noexcept {
+  return detail_horrible_cast::temp<T, U>{std::forward<U>(in)}.out;
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/log.h b/include/libimp/log.h
new file mode 100644
index 00000000..888a07c5
--- /dev/null
+++ b/include/libimp/log.h
@@ -0,0 +1,197 @@
+/**
+ * \file libimp/log.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Simple log output component.
+ * \date 2022-05-22
+ */
+#pragma once
+
+#include <string>
+#include <type_traits>
+#include <chrono>
+#include <tuple>
+#include <utility>
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+#include "libimp/export.h"
+#include "libimp/underlyof.h"
+#include "libimp/fmt.h"
+#include "libimp/generic.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace log {
+
+enum class level : std::int32_t {
+  trace,
+  debug,
+  info,
+  warning,
+  error,
+  failed,
+};
+
+/// \struct template <typename... T> struct context
+/// \brief Logging context.
+/// \tparam ...T - a log records all parameter types passed
+template <typename... T>
+struct context {
+  log::level level;
+  std::chrono::system_clock::time_point tp;
+  char const *func;
+  std::tuple<T...> params;
+};
+
+/// \brief Custom defined fmt_to method for imp::fmt
+namespace detail {
+
+template <typename Tp, std::size_t... I, typename... A>
+bool unfold_tuple_fmt_to(fmt_context &ctx, Tp const &tp, std::index_sequence<I...>, A &&...args) {
+  return fmt_to(ctx, std::forward<A>(args)..., std::get<I>(tp)...);
+}
+
+} // namespace detail
+
+template <typename... T>
+bool context_to_string(fmt_context &f_ctx, context<T...> const &l_ctx) {
+  static constexpr char types[] = {
+    'T', 'D', 'I', 'W', 'E', 'F',
+  };
+  auto ms = std::chrono::time_point_cast<std::chrono::milliseconds>(l_ctx.tp).time_since_epoch().count() % 1000;
+  return detail::unfold_tuple_fmt_to(f_ctx, l_ctx.params, std::index_sequence_for<T...>{},
+                                    "[", types[underlyof(l_ctx.level)], "]"
+                                    "[", l_ctx.tp, ".", spec("03")(ms), "]"
+                                    "[", l_ctx.func, "] ");
+}
+
+template <typename... T>
+std::string context_to_string(context<T...> const &l_ctx) {
+  std::string log_txt;
+  fmt_context f_ctx(log_txt);
+  LIBIMP_TRY {
+    if (!context_to_string(f_ctx, l_ctx)) {
+      return {};
+    }
+    f_ctx.finish();
+    return log_txt;
+  } LIBIMP_CATCH(...) {
+    f_ctx.finish();
+    throw;
+  }
+}
+
+/// \brief Standard console output object.
+inline auto &make_std_out() noexcept {
+  static auto std_out = [](auto const &ctx) {
+    auto s = context_to_string(ctx);
+    switch (ctx.level) {
+    case level::trace:
+    case level::debug:
+    case level::info:
+      std::fprintf(stdout, "%s\n", s.c_str());
+      break;
+    case level::warning:
+    case level::error:
+    case level::failed:
+      std::fprintf(stderr, "%s\n", s.c_str());
+      break;
+    default:
+      break;
+    }
+  };
+  return std_out;
+}
+
+/// \brief Get the exception information.
+inline char const *exception_string(std::exception_ptr eptr) noexcept {
+  LIBIMP_TRY {
+    if (eptr) {
+      std::rethrow_exception(eptr);
+    }
+  } LIBIMP_CATCH(std::exception const &e) {
+    return e.what();
+  } LIBIMP_CATCH(...) {
+    return "unknown";
+  }
+  return "none";
+}
+
+/// \brief Record the last information when an exception occurs.
+inline void exception_print(char const *func, std::exception_ptr eptr) noexcept {
+  if (func == nullptr) {
+    func = "-";
+  }
+  std::fprintf(stderr, "[F][%s] exception: %s\n", func, exception_string(eptr));
+}
+
+/**
+ * \brief Log information base class.
+ */
+class logger_base {
+protected:
+  char const *func_;
+  level level_limit_;
+
+  logger_base(char const *func, level level_limit) noexcept
+    : func_       (func)
+    , level_limit_(level_limit) {}
+};
+
+/**
+ * \brief Log information grips.
+ */
+template <typename Outputer>
+class logger : public logger_base {
+  Outputer out_;
+
+public:
+  template <typename O>
+  logger(char const *func, O &&out, level level_limit) noexcept
+    : logger_base(func, level_limit)
+    , out_       (std::forward<O>(out)) {}
+
+  template <typename... A>
+  logger const &operator()(log::level l, A &&...args) const noexcept {
+    if (underlyof(l) < underlyof(level_limit_)) {
+      return *this;
+    }
+    LIBIMP_TRY {
+      out_(context<A &&...> {
+        l, std::chrono::system_clock::now(), func_,
+        std::forward_as_tuple(std::forward<A>(args)...),
+      });
+    } LIBIMP_CATCH(...) {
+      exception_print(func_, std::current_exception());
+    }
+    return *this;
+  }
+
+  template <typename... A> logger const &trace  (A &&...args) const noexcept { return (*this)(log::level::trace  , std::forward<A>(args)...); }
+  template <typename... A> logger const &debug  (A &&...args) const noexcept { return (*this)(log::level::debug  , std::forward<A>(args)...); }
+  template <typename... A> logger const &info   (A &&...args) const noexcept { return (*this)(log::level::info   , std::forward<A>(args)...); }
+  template <typename... A> logger const &warning(A &&...args) const noexcept { return (*this)(log::level::warning, std::forward<A>(args)...); }
+  template <typename... A> logger const &error  (A &&...args) const noexcept { return (*this)(log::level::error  , std::forward<A>(args)...); }
+  template <typename... A> logger const &failed (A &&...args) const noexcept { return (*this)(log::level::failed , std::forward<A>(args)...); }
+};
+
+template <typename O>
+inline auto make_logger(char const *func, O &&out, level level_limit = level::info) noexcept {
+  return logger<std::decay_t<O>>(func, std::forward<O>(out), level_limit);
+}
+
+inline auto make_logger(char const *func, level level_limit = level::info) noexcept {
+  return make_logger(func, make_std_out(), level_limit);
+}
+
+inline auto make_logger(char const * /*ignore*/, char const *name, level level_limit = level::info) noexcept {
+  return make_logger(name, make_std_out(), level_limit);
+}
+
+#define LIBIMP_LOG_(...) \
+  auto log \
+    = [](auto &&...args) noexcept { \
+        return ::LIBIMP::log::make_logger(__func__, std::forward<decltype(args)>(args)...); \
+      }(__VA_ARGS__)
+
+} // namespace log
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/nameof.h b/include/libimp/nameof.h
new file mode 100644
index 00000000..dded0c39
--- /dev/null
+++ b/include/libimp/nameof.h
@@ -0,0 +1,41 @@
+/**
+ * \file libimp/nameof.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Gets the name string of a type.
+ * \date 2022-11-26
+ */
+#pragma once
+
+#include <typeinfo>
+#include <string>
+#include <cstring>
+
+#include "libimp/def.h"
+#include "libimp/export.h"
+#include "libimp/span.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief The conventional way to obtain demangled symbol name.
+ * \see https://www.boost.org/doc/libs/1_80_0/libs/core/doc/html/core/demangle.html
+ * 
+ * \param name the mangled name
+ * \return std::string a human-readable demangled type name
+ */
+LIBIMP_EXPORT std::string demangle(span<char const> name) noexcept;
+
+/**
+ * \brief Returns an implementation defined string containing the name of the type.
+ * \see https://en.cppreference.com/w/cpp/types/type_info/name
+ * 
+ * \tparam T a type
+ * \return std::string a human-readable demangled type name
+ */
+template <typename T>
+std::string nameof() noexcept {
+  auto c_str_name = typeid(T).name();
+  return demangle({c_str_name, std::strlen(c_str_name)});
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/pimpl.h b/include/libimp/pimpl.h
new file mode 100644
index 00000000..990d0de6
--- /dev/null
+++ b/include/libimp/pimpl.h
@@ -0,0 +1,73 @@
+/**
+ * \file libimp/pimpl.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Pointer To Implementation (pImpl) idiom.
+ * \date 2022-02-27
+ */
+#pragma once
+
+#include <utility>
+#include <type_traits>
+#include <cstdint>
+
+#include "libimp/uninitialized.h"
+#include "libimp/def.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace pimpl {
+
+template <typename T, typename R = T *>
+struct is_comfortable {
+  enum : bool {
+    value = (sizeof(T) <= sizeof(R)) && (alignof(T) <= alignof(R))
+  };
+};
+
+template <typename T, typename... A>
+auto make(A &&...args) -> std::enable_if_t<is_comfortable<T>::value, T *> {
+  T *buf {};
+  // construct an object using memory of a pointer
+  construct<T>(&buf, std::forward<A>(args)...);
+  return buf;
+}
+
+template <typename T>
+auto get(T * const (& p)) noexcept -> std::enable_if_t<is_comfortable<T>::value, T *> {
+  return reinterpret_cast<T*>(&const_cast<char &>(reinterpret_cast<char const &>(p)));
+}
+
+template <typename T>
+auto clear(T *p) noexcept -> std::enable_if_t<is_comfortable<T>::value> {
+  if (p != nullptr) destroy(get(p));
+}
+
+template <typename T, typename... A>
+auto make(A &&...args) -> std::enable_if_t<!is_comfortable<T>::value, T *> {
+  return new T{std::forward<A>(args)...};
+}
+
+template <typename T>
+auto get(T * const (& p)) noexcept -> std::enable_if_t<!is_comfortable<T>::value, T *> {
+  return p;
+}
+
+template <typename T>
+auto clear(T *p) noexcept -> std::enable_if_t<!is_comfortable<T>::value> {
+  if (p != nullptr) delete p;
+}
+
+template <typename T>
+class Obj {
+public:
+  template <typename... A>
+  static T *make(A &&...args) {
+    return pimpl::make<T>(std::forward<A>(args)...);
+  }
+
+  void clear() noexcept {
+    pimpl::clear(static_cast<T *>(const_cast<Obj *>(this)));
+  }
+};
+
+} // namespace pimpl
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/result.h b/include/libimp/result.h
new file mode 100644
index 00000000..d9f2a9ad
--- /dev/null
+++ b/include/libimp/result.h
@@ -0,0 +1,221 @@
+/**
+ * \file libimp/result.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the return value type with a status code.
+ * \date 2022-04-17
+ */
+#pragma once
+
+#include <type_traits>
+#include <string>
+#include <tuple>
+#include <cstdint>
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+#include "libimp/export.h"
+#include "libimp/fmt.h"
+#include "libimp/generic.h"
+#include "libimp/error.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace detail_result {
+
+template <typename T, typename = void>
+struct default_traits;
+
+} // namespace detail_result
+
+template <typename T, 
+          typename TypeTraits = detail_result::default_traits<T>>
+class result;
+
+/// \typedef Uses std::uint64_t as the default underlying type of result code.
+using result_code = result<std::uint64_t>;
+
+namespace detail_result {
+
+template <typename T>
+struct generic_traits {
+  /// \typedef Combine data and valid identifiers with a tuple.
+  using storage_t = std::tuple<T, std::error_code>;
+
+  /// \brief Custom initialization.
+  static constexpr void init_code(storage_t &code) noexcept {
+    code = {{}, std::error_code(-1, std::generic_category())};
+  }
+  static constexpr void init_code(storage_t &code, T value, std::error_code const &ec) noexcept {
+    code = {value, ec};
+  }
+  static constexpr void init_code(storage_t &code, T value) noexcept {
+    code = {value, {}};
+  }
+  static constexpr void init_code(storage_t &code, std::error_code const &ec) noexcept {
+    code = {{}, ec};
+  }
+
+  /// \brief Custom type data acquisition.
+  static constexpr T get_value(storage_t const &code) noexcept {
+    return std::get<0>(code);
+  }
+  static constexpr bool get_ok(storage_t const &code) noexcept {
+    return !std::get<1>(code);
+  }
+  static constexpr std::error_code get_error(storage_t const &code) noexcept {
+    return std::get<1>(code);
+  }
+};
+
+template <typename ___>
+struct default_traits<void, ___> {
+  /// \typedef Use the `error_code` as the storage type.
+  using storage_t = std::error_code;
+
+  /// \brief Custom initialization.
+  static constexpr void init_code(storage_t &code) noexcept {
+    code = std::error_code(-1, std::generic_category());
+  }
+  static constexpr void init_code(storage_t &code, std::error_code const &ec) noexcept {
+    code = ec;
+  }
+
+  /// \brief Custom type data acquisition.
+  static constexpr bool get_ok(storage_t const &code) noexcept {
+    return !code;
+  }
+  static constexpr std::error_code get_error(storage_t const &code) noexcept {
+    return code;
+  }
+
+  /// \brief Custom formatted output.
+  static std::string format(result<void> const &r);
+};
+
+template <typename T>
+struct default_traits<T, std::enable_if_t<std::is_integral<T>::value || std::is_enum<T>::value>>
+     : generic_traits<T> {
+  /// \brief Custom initialization.
+  static constexpr void init_code(typename generic_traits<T>::storage_t &code, 
+                                  T value, bool ok) noexcept {
+    code = {value, ok ? std::error_code() : std::error_code(-1, std::generic_category())};
+  }
+  using generic_traits<T>::init_code;
+
+  /// \brief Custom formatted output.
+  static std::string format(result<T> const &r) noexcept;
+};
+
+template <typename T>
+struct default_traits<T, std::enable_if_t<std::is_pointer<T>::value>> : generic_traits<T> {
+  /// \brief Custom initialization.
+  static constexpr void init_code(typename generic_traits<T>::storage_t &code, 
+                                  std::nullptr_t, std::error_code const &ec) noexcept {
+    code = {nullptr, ec};
+  }
+  static constexpr void init_code(typename generic_traits<T>::storage_t &code, 
+                                  std::nullptr_t) noexcept {
+    code = {nullptr, std::error_code(-1, std::generic_category())};
+  }
+  using generic_traits<T>::init_code;
+
+  /// \brief Custom formatted output.
+  static std::string format(result<T> const &r) noexcept;
+};
+
+} // namespace detail_result
+
+/**
+ * \class class result
+ * \brief The generic wrapper for the result type.
+ */
+template <typename T, typename TypeTraits>
+class result : public TypeTraits {
+public:
+  using type_traits_t = TypeTraits;
+  using storage_t     = typename type_traits_t::storage_t;
+
+private:
+  storage_t code_; ///< internal data
+
+public:
+  template <typename... A, 
+            typename = not_match<result, A...>,
+            typename = decltype(type_traits_t::init_code(std::declval<storage_t &>()
+                                                       , std::declval<A>()...))>
+  result(A &&...args) noexcept {
+    type_traits_t::init_code(code_, std::forward<A>(args)...);
+  }
+
+  T               value() const noexcept { return type_traits_t::get_value(code_); }
+  bool            ok   () const noexcept { return type_traits_t::get_ok   (code_); }
+  std::error_code error() const noexcept { return type_traits_t::get_error(code_); }
+
+         T operator *   () const noexcept { return value(); }
+  explicit operator bool() const noexcept { return ok   (); }
+
+  friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
+  friend bool operator!=(result const &lhs, result const &rhs) noexcept { return !(lhs == rhs); }
+};
+
+template <typename TypeTraits>
+class result<void, TypeTraits> {
+public:
+  using type_traits_t = TypeTraits;
+  using storage_t     = typename type_traits_t::storage_t;
+
+private:
+  storage_t code_; ///< internal data
+
+public:
+  template <typename... A, 
+            typename = not_match<result, A...>,
+            typename = decltype(type_traits_t::init_code(std::declval<storage_t &>()
+                                                       , std::declval<A>()...))>
+  result(A &&...args) noexcept {
+    type_traits_t::init_code(code_, std::forward<A>(args)...);
+  }
+
+  bool            ok   () const noexcept { return type_traits_t::get_ok   (code_); }
+  std::error_code error() const noexcept { return type_traits_t::get_error(code_); }
+
+  explicit operator bool() const noexcept { return ok(); }
+
+  friend bool operator==(result const &lhs, result const &rhs) noexcept { return lhs.code_ == rhs.code_; }
+  friend bool operator!=(result const &lhs, result const &rhs) noexcept { return !(lhs == rhs); }
+};
+
+/// \brief Custom defined fmt_to method for imp::fmt
+namespace detail_result {
+
+template <typename ___>
+std::string default_traits<void, ___>::format(result<void> const &r) {
+  return fmt("error = ", r.error());
+}
+
+template <typename T>
+std::string default_traits<T, std::enable_if_t<std::is_integral<T>::value || std::is_enum<T>::value>>
+          ::format(result<T> const &r) noexcept {
+  return fmt(*r);
+}
+
+template <typename T>
+std::string default_traits<T, std::enable_if_t<std::is_pointer<T>::value>>
+          ::format(result<T> const &r) noexcept {
+  if LIBIMP_LIKELY(r) {
+    return fmt(static_cast<void *>(*r));
+  }
+  return fmt(static_cast<void *>(*r), ", error = ", r.error());
+}
+
+template <typename T, typename D>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<T, D> r) {
+  return fmt_to(ctx, (r ? "succ" : "fail"), ", value = ", result<T, D>::type_traits_t::format(r));
+}
+
+template <typename D>
+bool tag_invoke(decltype(::LIBIMP::fmt_to), fmt_context &ctx, result<void, D> r) {
+  return fmt_to(ctx, (r ? "succ" : "fail"), ", ", result<void, D>::type_traits_t::format(r));
+}
+
+} // namespace detail_result
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/scope_exit.h b/include/libimp/scope_exit.h
new file mode 100644
index 00000000..7604311f
--- /dev/null
+++ b/include/libimp/scope_exit.h
@@ -0,0 +1,79 @@
+/**
+ * \file libimp/scope_exit.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Execute guard function when the enclosing scope exits.
+ * \date 2022-03-01
+ */
+#pragma once
+
+#include <utility>    // std::forward, std::move
+#include <functional> // std::function
+#include <type_traits>
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+template <typename F = std::function<void()>>
+class scope_exit {
+  F destructor_;
+  mutable bool released_;
+
+public:
+  template <typename G>
+  explicit scope_exit(G &&destructor) noexcept
+    : destructor_(std::forward<G>(destructor))
+    , released_  (false) {}
+
+  scope_exit(scope_exit &&other) noexcept
+    : destructor_(std::move(other.destructor_))
+    , released_  (std::exchange(other.released_, true)) /*release rhs*/ {}
+
+  scope_exit &operator=(scope_exit &&other) noexcept {
+    destructor_ = std::move(other.destructor_);
+    released_   = std::exchange(other.released_, true);
+    return *this;
+  }
+
+  ~scope_exit() noexcept {
+    if (!released_) destructor_();
+  }
+
+  void release() const noexcept {
+    released_ = true;
+  }
+
+  void do_exit() noexcept {
+    if (released_) return;
+    destructor_();
+    released_ = true;
+  }
+
+  void swap(scope_exit &other) noexcept {
+    std::swap(destructor_, other.destructor_);
+    std::swap(released_  , other.released_);
+  }
+};
+
+/// \brief Creates a scope_exit object.
+template <typename F>
+auto make_scope_exit(F &&destructor) noexcept {
+  return scope_exit<std::decay_t<F>>(std::forward<F>(destructor));
+}
+
+namespace detail {
+
+struct scope_exit_helper {
+  template <typename F>
+  auto operator=(F &&f) const noexcept {
+    return make_scope_exit(std::forward<F>(f));
+  }
+};
+
+} // namespace detail
+
+#define LIBIMP_SCOPE_EXIT($VAL) \
+  LIBIMP_UNUSED auto $VAL = ::LIBIMP::detail::scope_exit_helper{}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/span.h b/include/libimp/span.h
new file mode 100644
index 00000000..fe942848
--- /dev/null
+++ b/include/libimp/span.h
@@ -0,0 +1,284 @@
+/**
+ * \file libimp/span.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Describes an object that can refer to a contiguous sequence of objects.
+ * \date 2022-10-16
+ */
+#pragma once
+
+#include <type_traits>
+#include <cstddef>
+#include <iterator>
+#include <array>
+#include <vector>
+#include <string>
+#include <limits>
+#include <algorithm>
+#include <cstdint>
+#include <initializer_list>
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+#include "libimp/countof.h"
+#include "libimp/dataof.h"
+
+#if defined(LIBIMP_CPP_20) && defined(__cpp_lib_span)
+#include <span>
+#define LIBIMP_CPP_LIB_SPAN_
+#endif // __cpp_lib_span
+
+LIBIMP_NAMESPACE_BEG_
+namespace detail {
+
+/// \brief Helper trait for span.
+
+template <typename From, typename To>
+using array_convertible = std::is_convertible<From(*)[], To(*)[]>;
+
+template <typename From, typename To>
+using is_array_convertible = 
+  typename std::enable_if<array_convertible<From, To>::value>::type;
+
+template <typename T, typename Ref>
+using compatible_ref = array_convertible<typename std::remove_reference<Ref>::type, T>;
+
+template <typename It>
+using iter_reference_t = decltype(*std::declval<It&>());
+
+template <typename T, typename It>
+using is_compatible_iter = 
+  typename std::enable_if<compatible_ref<T, iter_reference_t<It>>::value>::type;
+
+template <typename From, typename To>
+using is_inconvertible = 
+  typename std::enable_if<!std::is_convertible<From, To>::value>::type;
+
+template <typename S, typename I>
+using is_sized_sentinel_for = 
+  typename std::enable_if<std::is_convertible<decltype(std::declval<S>() - std::declval<I>()), 
+                          std::ptrdiff_t>::value>::type;
+
+template <typename T>
+using is_continuous_container =
+  decltype(dataof(std::declval<T>()), countof(std::declval<T>()));
+
+/// \brief Obtain the address represented by p 
+///        without forming a reference to the object pointed to by p.
+/// \see https://en.cppreference.com/w/cpp/memory/to_address
+
+template<typename T>
+constexpr T *to_address(T *ptr) noexcept {
+  static_assert(!std::is_function<T>::value, "ptr shouldn't a function pointer");
+  return ptr;
+}
+
+template<typename T>
+constexpr auto to_address(T const &ptr) 
+  noexcept(noexcept(ptr.operator->()))
+        -> decltype(ptr.operator->()) {
+  return to_address(ptr.operator->());
+}
+
+} // namespace detail
+
+/**
+ * \brief A simple implementation of span.
+ * \see https://en.cppreference.com/w/cpp/container/span
+ */
+template <typename T>
+class span {
+public:
+  using element_type     = T;
+  using value_type       = typename std::remove_cv<element_type>::type;
+  using size_type        = std::size_t;
+  using difference_type  = std::ptrdiff_t;
+  using pointer          = element_type *;
+  using const_pointer    = typename std::remove_const<element_type>::type const *;
+  using reference        = element_type &;
+  using const_reference  = typename std::remove_const<element_type>::type const &;
+  using iterator         = pointer;
+  using reverse_iterator = std::reverse_iterator<iterator>;
+
+private:
+  pointer   ptr_    {nullptr};
+  size_type extent_ {0};
+
+public:
+  constexpr span() noexcept = default;
+  constexpr span(span const &) noexcept = default;
+#if (LIBIMP_CC_MSVC > LIBIMP_CC_MSVC_2015)
+  constexpr
+#endif
+  span & operator=(span const &) noexcept = default;
+
+  template <typename It, 
+            typename = detail::is_compatible_iter<T, It>>
+  constexpr span(It first, size_type count) noexcept
+    : ptr_   (detail::to_address(first))
+    , extent_(count) {}
+
+  template <typename It, typename End,
+            typename = detail::is_compatible_iter<T, It>,
+            typename = detail::is_sized_sentinel_for<End, It>,
+            typename = detail::is_inconvertible<End, size_type>>
+  constexpr span(It first, End last) noexcept(noexcept(last - first))
+    : ptr_   (detail::to_address(first))
+    , extent_(static_cast<size_type>(last - first)) {}
+
+  template <typename U,
+            typename = detail::is_continuous_container<U>,
+            typename = detail::is_array_convertible<std::remove_pointer_t<
+              decltype(dataof(std::declval<U>()))>, element_type>>
+  constexpr span(U &&u) noexcept(noexcept(dataof (std::forward<U>(u)), 
+                                          countof(std::forward<U>(u))))
+    : ptr_   (dataof (std::forward<U>(u)))
+    , extent_(countof(std::forward<U>(u))) {}
+
+  template <typename U, std::size_t E,
+            typename = detail::is_array_convertible<U, element_type>>
+  constexpr span(U (&arr)[E]) noexcept
+    : span(static_cast<pointer>(arr), E) {}
+
+  template <typename U, std::size_t E,
+            typename = detail::is_array_convertible<U, element_type>>
+  constexpr span(std::array<U, E> &arr) noexcept
+	  : span(static_cast<pointer>(arr.data()), E) {}
+
+  template <typename U, std::size_t E,
+            typename = detail::is_array_convertible<typename std::add_const<U>::type, element_type>>
+  constexpr span(std::array<U, E> const &arr) noexcept
+	  : span(static_cast<pointer>(arr.data()), E) {}
+
+  template <typename U,
+            typename = detail::is_array_convertible<U, T>>
+  constexpr span(span<U> const &s) noexcept
+    : ptr_   (s.data())
+    , extent_(s.size()) {}
+
+#ifdef LIBIMP_CPP_LIB_SPAN_
+  template <typename U, std::size_t E,
+            typename = detail::is_array_convertible<U, T>>
+  constexpr span(std::span<U, E> const &s) noexcept
+    : ptr_   (s.data())
+    , extent_(s.size()) {}
+#endif // LIBIMP_CPP_LIB_SPAN_
+
+  constexpr size_type size() const noexcept {
+    return extent_;
+  }
+
+  constexpr size_type size_bytes() const noexcept {
+    return size() * sizeof(element_type);
+  }
+
+  constexpr bool empty() const noexcept {
+    return size() == 0;
+  }
+
+  constexpr pointer data() const noexcept {
+    return this->ptr_;
+  }
+
+  constexpr reference front() const noexcept {
+    return *data();
+  }
+
+  constexpr reference back() const noexcept {
+    return *(data() + (size() - 1));
+  }
+
+  constexpr reference operator[](size_type idx) const noexcept {
+    return *(data() + idx);
+  }
+
+  constexpr iterator begin() const noexcept {
+    return iterator(data());
+  }
+
+  constexpr iterator end() const noexcept {
+    return iterator(data() + this->size());
+  }
+
+  constexpr reverse_iterator rbegin() const noexcept {
+    return reverse_iterator(this->end());
+  }
+
+  constexpr reverse_iterator rend() const noexcept {
+    return reverse_iterator(this->begin());
+  }
+
+  constexpr span first(size_type count) const noexcept {
+    return span(begin(), count);
+  }
+
+  constexpr span last(size_type count) const noexcept {
+    return span(end() - count, count);
+  }
+
+  constexpr span subspan(size_type offset, size_type count = (std::numeric_limits<size_type>::max)()) const noexcept {
+    return (offset >= size()) ? span() : span(begin() + offset, (std::min)(size() - offset, count));
+  }
+};
+
+/// \brief Support for span equals comparison.
+
+template <typename T, typename U, 
+          typename = decltype(std::declval<T>() == std::declval<U>())>
+bool operator==(span<T> a, span<U> b) noexcept {
+  if (a.size() != b.size()) {
+    return false;
+  }
+  for (std::size_t i = 0; i < a.size(); ++i) {
+    if (a[i] != b[i]) return false;
+  }
+  return true;
+}
+
+/// \brief Constructs an object of type T and wraps it in a span.
+/// Before C++17, template argument deduction for class templates was not supported.
+/// \see https://en.cppreference.com/w/cpp/language/template_argument_deduction
+
+template <typename T>
+auto make_span(T *arr, std::size_t count) noexcept -> span<T> {
+  return {arr, count};
+}
+
+template <typename T, std::size_t E>
+auto make_span(T (&arr)[E]) noexcept -> span<T> {
+  return {arr};
+}
+
+template <typename T, std::size_t E>
+auto make_span(std::array<T, E> &arr) noexcept -> span<T> {
+  return {arr};
+}
+
+template <typename T, std::size_t E>
+auto make_span(std::array<T, E> const &arr) noexcept -> span<typename std::add_const<T>::type> {
+  return {arr};
+}
+
+template <typename T>
+auto make_span(std::vector<T> &arr) noexcept -> span<T> {
+  return {arr.data(), arr.size()};
+}
+
+template <typename T>
+auto make_span(std::vector<T> const &arr) noexcept -> span<typename std::add_const<T>::type> {
+  return {arr.data(), arr.size()};
+}
+
+template <typename T>
+auto make_span(std::initializer_list<T> list) noexcept -> span<typename std::add_const<T>::type> {
+  return {list.begin(), list.end()};
+}
+
+inline auto make_span(std::string &str) noexcept -> span<char> {
+  return {const_cast<char *>(str.data()), str.size()};
+}
+
+inline auto make_span(std::string const &str) noexcept -> span<char const> {
+  return {str.data(), str.size()};
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/system.h b/include/libimp/system.h
new file mode 100644
index 00000000..6dc9fbd7
--- /dev/null
+++ b/include/libimp/system.h
@@ -0,0 +1,35 @@
+/**
+ * \file libimp/system.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Isolation and encapsulation of system APIs.
+ * \date 2022-08-07
+ */
+#pragma once
+
+#include <string>
+#include <ostream>  // std::ostream
+#include <cstdint>
+
+#include "libimp/def.h"
+#include "libimp/export.h"
+#include "libimp/error.h"
+#include "libimp/result.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace sys {
+
+/// \brief A platform-dependent error code.
+LIBIMP_EXPORT std::error_code error() noexcept;
+
+/// \enum The name of the `conf()` argument used to inquire about its value.
+/// \brief Certain options are supported, 
+/// or what the value is of certain configurable constants or limits.
+enum class info : std::int32_t {
+  page_size,
+};
+
+/// \brief Get system configuration information at run time.
+LIBIMP_EXPORT result<std::int64_t> conf(info) noexcept;
+
+} // namespace sys
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/underlyof.h b/include/libimp/underlyof.h
new file mode 100644
index 00000000..0fa4ace0
--- /dev/null
+++ b/include/libimp/underlyof.h
@@ -0,0 +1,23 @@
+/**
+ * \file libimp/underlyof.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Returns the underlying type of the given enum.
+ * \date 2022-03-01
+ */
+#pragma once
+
+#include <type_traits>  // std::underlying_type_t
+
+#include "libimp/def.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/// \brief Returns after converting the value to the underlying type of E.
+/// \see https://en.cppreference.com/w/cpp/types/underlying_type
+///      https://en.cppreference.com/w/cpp/utility/to_underlying
+template <typename E>
+constexpr auto underlyof(E e) noexcept {
+  return static_cast<std::underlying_type_t<E>>(e);
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libimp/uninitialized.h b/include/libimp/uninitialized.h
new file mode 100644
index 00000000..b3525003
--- /dev/null
+++ b/include/libimp/uninitialized.h
@@ -0,0 +1,148 @@
+/**
+ * \file libimp/uninitialized.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Uninitialized memory algorithms.
+ * \date 2022-02-27
+ */
+#pragma once
+
+#include <new>          // placement-new
+#include <type_traits>  // std::enable_if_t
+#include <utility>      // std::forward
+#include <memory>       // std::construct_at, std::destroy_at, std::addressof
+#include <cstddef>
+
+#include "libimp/def.h"
+#include "libimp/detect_plat.h"
+#include "libimp/horrible_cast.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief Creates an object at a given address, like 'construct_at' in c++20
+ * \see https://en.cppreference.com/w/cpp/memory/construct_at
+*/
+
+template <typename T, typename... A>
+auto construct(void *p, A &&...args)
+  -> std::enable_if_t<::std::is_constructible<T, A...>::value, T *> {
+#if defined(LIBIMP_CPP_20)
+  return std::construct_at(static_cast<T *>(p), std::forward<A>(args)...);
+#else
+  return ::new (p) T(std::forward<A>(args)...);
+#endif
+}
+
+template <typename T, typename... A>
+auto construct(void *p, A &&...args)
+  -> std::enable_if_t<!::std::is_constructible<T, A...>::value, T *> {
+  return ::new (p) T{std::forward<A>(args)...};
+}
+
+/**
+ * \brief Destroys an object at a given address, like 'destroy_at' in c++17
+ * \see https://en.cppreference.com/w/cpp/memory/destroy_at
+*/
+
+template <typename T>
+void *destroy(T *p) noexcept {
+  if (p == nullptr) return nullptr;
+#if defined(LIBIMP_CPP_17)
+  std::destroy_at(p);
+#else
+  p->~T();
+#endif
+  return p;
+}
+
+template <typename T, std::size_t N>
+void *destroy(T (*p)[N]) noexcept {
+  if (p == nullptr) return nullptr;
+#if defined(LIBIMP_CPP_20)
+  std::destroy_at(p);
+#elif defined(LIBIMP_CPP_17)
+  std::destroy(std::begin(*p), std::end(*p));
+#else
+  for (auto &elem : *p) destroy(std::addressof(elem));
+#endif
+  return p;
+}
+
+/**
+ * \brief Destroys a range of objects.
+ * \see https://en.cppreference.com/w/cpp/memory/destroy
+*/
+template <typename ForwardIt>
+void destroy(ForwardIt first, ForwardIt last) noexcept {
+#if defined(LIBIMP_CPP_17)
+  std::destroy(first, last);
+#else
+  for (; first != last; ++first) {
+    destroy(std::addressof(*first));
+  }
+#endif
+}
+
+/**
+ * \brief Destroys a number of objects in a range.
+ * \see https://en.cppreference.com/w/cpp/memory/destroy_n
+*/
+template <typename ForwardIt, typename Size>
+ForwardIt destroy_n(ForwardIt first, Size n) noexcept {
+#if defined(LIBIMP_CPP_17)
+  return std::destroy_n(first, n);
+#else
+  for (; n > 0; (void) ++first, --n)
+    destroy(std::addressof(*first));
+  return first;
+#endif
+}
+
+/**
+ * \brief Constructs objects by default-initialization 
+ *        in an uninitialized area of memory, defined by a start and a count.
+ * \see https://en.cppreference.com/w/cpp/memory/uninitialized_default_construct_n
+*/
+template <typename ForwardIt, typename Size>
+ForwardIt uninitialized_default_construct_n(ForwardIt first, Size n) {
+#if defined(LIBIMP_CPP_17)
+  return std::uninitialized_default_construct_n(first, n);
+#else
+  using T = typename std::iterator_traits<ForwardIt>::value_type;
+  ForwardIt current = first;
+  LIBIMP_TRY {
+    for (; n > 0; (void) ++current, --n)
+      ::new (horrible_cast<void *>(std::addressof(*current))) T;
+    return current;
+  } LIBIMP_CATCH(...) {
+    destroy(first, current);
+    LIBIMP_THROW(, first);
+  }
+#endif
+}
+
+/**
+* \brief Moves a number of objects to an uninitialized area of memory.
+* \see https://en.cppreference.com/w/cpp/memory/uninitialized_move_n
+*/
+template <typename InputIt, typename Size, typename NoThrowForwardIt>
+auto uninitialized_move_n(InputIt first, Size count, NoThrowForwardIt d_first)
+  -> std::pair<InputIt, NoThrowForwardIt> {
+#if defined(LIBIMP_CPP_17)
+  return std::uninitialized_move_n(first, count, d_first);
+#else
+  using Value = typename std::iterator_traits<NoThrowForwardIt>::value_type;
+  NoThrowForwardIt current = d_first;
+  LIBIMP_TRY {
+    for (; count > 0; ++first, (void) ++current, --count) {
+      ::new (static_cast<void *>(std::addressof(*current))) Value(std::move(*first));
+    }
+  } LIBIMP_CATCH(...) {
+    destroy(d_first, current);
+    LIBIMP_THROW(, {first, d_first});
+  }
+  return {first, current};
+#endif
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/include/libipc/buffer.h b/include/libipc/buffer.h
deleted file mode 100755
index 3f8c229b..00000000
--- a/include/libipc/buffer.h
+++ /dev/null
@@ -1,68 +0,0 @@
-#pragma once
-
-#include <cstddef>
-#include <tuple>
-#include <vector>
-#include <type_traits>
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-
-namespace ipc {
-
-class IPC_EXPORT buffer {
-public:
-    using destructor_t = void (*)(void*, std::size_t);
-
-    buffer();
-
-    buffer(void* p, std::size_t s, destructor_t d);
-    buffer(void* p, std::size_t s, destructor_t d, void* additional);
-    buffer(void* p, std::size_t s);
-
-    template <std::size_t N>
-    explicit buffer(byte_t const (& data)[N])
-        : buffer(data, sizeof(data)) {
-    }
-    explicit buffer(char const & c);
-
-    buffer(buffer&& rhs);
-    ~buffer();
-
-    void swap(buffer& rhs);
-    buffer& operator=(buffer rhs);
-
-    bool empty() const noexcept;
-
-    void *       data()       noexcept;
-    void const * data() const noexcept;
-
-    template <typename T>
-    T get() const { return T(data()); }
-
-    std::size_t size() const noexcept;
-
-    std::tuple<void*, std::size_t> to_tuple() {
-        return std::make_tuple(data(), size());
-    }
-
-    std::tuple<void const *, std::size_t> to_tuple() const {
-        return std::make_tuple(data(), size());
-    }
-
-    std::vector<byte_t> to_vector() const {
-        return {
-            get<byte_t const *>(),
-            get<byte_t const *>() + size()
-        };
-    }
-
-    friend IPC_EXPORT bool operator==(buffer const & b1, buffer const & b2);
-    friend IPC_EXPORT bool operator!=(buffer const & b1, buffer const & b2);
-
-private:
-    class buffer_;
-    buffer_* p_;
-};
-
-} // namespace ipc
diff --git a/include/libipc/condition.h b/include/libipc/condition.h
deleted file mode 100644
index a4e2ac30..00000000
--- a/include/libipc/condition.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#pragma once
-
-#include <cstdint>  // std::uint64_t
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-#include "libipc/mutex.h"
-
-namespace ipc {
-namespace sync {
-
-class IPC_EXPORT condition {
-    condition(condition const &) = delete;
-    condition &operator=(condition const &) = delete;
-
-public:
-    condition();
-    explicit condition(char const *name);
-    ~condition();
-
-    void const *native() const noexcept;
-    void *native() noexcept;
-
-    bool valid() const noexcept;
-
-    bool open(char const *name) noexcept;
-    void close() noexcept;
-
-    bool wait(ipc::sync::mutex &mtx, std::uint64_t tm = ipc::invalid_value) noexcept;
-    bool notify(ipc::sync::mutex &mtx) noexcept;
-    bool broadcast(ipc::sync::mutex &mtx) noexcept;
-
-private:
-    class condition_;
-    condition_* p_;
-};
-
-} // namespace sync
-} // namespace ipc
diff --git a/include/libipc/def.h b/include/libipc/def.h
index 8c1a72ba..c849a729 100755
--- a/include/libipc/def.h
+++ b/include/libipc/def.h
@@ -1,68 +1,38 @@
+/**
+ * \file libipc/def.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the trivial configuration information.
+ * \date 2022-02-27
+ */
 #pragma once
 
 #include <cstddef>
 #include <cstdint>
-#include <limits>       // std::numeric_limits
-#include <new>
-#include <utility>
 
-namespace ipc {
+#define LIBIPC                ipc
+#define LIBIPC_NAMESPACE_BEG_ namespace LIBIPC {
+#define LIBIPC_NAMESPACE_END_ }
 
-// types
+LIBIPC_NAMESPACE_BEG_
 
-using byte_t = std::uint8_t;
+/// \brief Constants.
 
-template <std::size_t N>
-struct uint;
-
-template <> struct uint<8 > { using type = std::uint8_t ; };
-template <> struct uint<16> { using type = std::uint16_t; };
-template <> struct uint<32> { using type = std::uint32_t; };
-template <> struct uint<64> { using type = std::uint64_t; };
-
-template <std::size_t N>
-using uint_t = typename uint<N>::type;
-
-// constants
-
-enum : std::uint32_t {
-    invalid_value   = (std::numeric_limits<std::uint32_t>::max)(),
-    default_timeout = 100, // ms
-};
-
-enum : std::size_t {
-    data_length     = 64,
-    large_msg_limit = data_length,
-    large_msg_align = 1024,
-    large_msg_cache = 32,
-};
-
-enum class relat { // multiplicity of the relationship
-    single,
-    multi
+struct prot {
+  using type = std::uint32_t;
+  enum : type {
+    none  = 0x00,
+    read  = 0x01,
+    write = 0x02,
+  };
 };
 
-enum class trans { // transmission
-    unicast,
-    broadcast
+struct mode {
+  using type = std::uint32_t;
+  enum : type {
+    none   = 0x00,
+    create = 0x01,
+    open   = 0x02,
+  };
 };
 
-// producer-consumer policy flag
-
-template <relat Rp, relat Rc, trans Ts>
-struct wr {};
-
-template <typename WR>
-struct relat_trait;
-
-template <relat Rp, relat Rc, trans Ts>
-struct relat_trait<wr<Rp, Rc, Ts>> {
-    constexpr static bool is_multi_producer = (Rp == relat::multi);
-    constexpr static bool is_multi_consumer = (Rc == relat::multi);
-    constexpr static bool is_broadcast      = (Ts == trans::broadcast);
-};
-
-template <template <typename> class Policy, typename Flag>
-struct relat_trait<Policy<Flag>> : relat_trait<Flag> {};
-
-} // namespace ipc
+LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/event.h b/include/libipc/event.h
new file mode 100644
index 00000000..ee56ac7c
--- /dev/null
+++ b/include/libipc/event.h
@@ -0,0 +1,48 @@
+/**
+ * \file libipc/event.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Defines event objects for cross-process communication.
+ */
+#pragma once
+
+#include <string>
+#include <cstdint>
+
+#include "libimp/export.h"
+#include "libimp/result.h"
+#include "libimp/span.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+struct evt_handle;
+using evt_t = evt_handle *;
+
+/// \brief Creates or opens a named event object.
+LIBIMP_EXPORT ::LIBIMP::result<evt_t> evt_open(std::string name) noexcept;
+
+/// \brief Close the event object.
+LIBIMP_EXPORT ::LIBIMP::result<void> evt_close(evt_t) noexcept;
+
+/// \brief Gets the name of the event object based on the event handle.
+/// \return empty string on failure.
+LIBIMP_EXPORT std::string evt_name(evt_t) noexcept;
+
+/// \brief Sets the event object to the signaled state.
+LIBIMP_EXPORT ::LIBIMP::result<void> evt_set(evt_t) noexcept;
+
+/// \brief Waits until the specified object is in the signaled state or the time-out interval elapses.
+LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(evt_t, std::int64_t ms) noexcept;
+
+/// \brief Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
+LIBIMP_EXPORT ::LIBIMP::result<bool> evt_wait(::LIBIMP::span<evt_t const>, std::int64_t ms) noexcept;
+
+/**
+ * \brief The event object.
+ */
+class LIBIMP_EXPORT event {
+  evt_t evt_;
+};
+
+LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/export.h b/include/libipc/export.h
deleted file mode 100755
index 6024f2f1..00000000
--- a/include/libipc/export.h
+++ /dev/null
@@ -1,54 +0,0 @@
-#pragma once
-
-#if defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
-
-#   define IPC_DECL_EXPORT Q_DECL_EXPORT
-#   define IPC_DECL_IMPORT Q_DECL_IMPORT
-
-#else // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
-
-/*
- * Compiler & system detection for IPC_DECL_EXPORT & IPC_DECL_IMPORT.
- * Not using QtCore cause it shouldn't depend on Qt.
-*/
-
-#if defined(_MSC_VER)
-#   define IPC_DECL_EXPORT      __declspec(dllexport)
-#   define IPC_DECL_IMPORT      __declspec(dllimport)
-#elif defined(__ARMCC__) || defined(__CC_ARM)
-#   if defined(ANDROID) || defined(__linux__) || defined(__linux)
-#       define IPC_DECL_EXPORT  __attribute__((visibility("default")))
-#       define IPC_DECL_IMPORT  __attribute__((visibility("default")))
-#   else
-#       define IPC_DECL_EXPORT  __declspec(dllexport)
-#       define IPC_DECL_IMPORT  __declspec(dllimport)
-#   endif
-#elif defined(__GNUC__)
-#   if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-       defined(WIN64) || defined(_WIN64) || defined(__WIN64__)
-#       define IPC_DECL_EXPORT  __declspec(dllexport)
-#       define IPC_DECL_IMPORT  __declspec(dllimport)
-#   else
-#       define IPC_DECL_EXPORT  __attribute__((visibility("default")))
-#       define IPC_DECL_IMPORT  __attribute__((visibility("default")))
-#   endif
-#else
-#   define IPC_DECL_EXPORT      __attribute__((visibility("default")))
-#   define IPC_DECL_IMPORT      __attribute__((visibility("default")))
-#endif
-
-#endif // defined(Q_DECL_EXPORT) && defined(Q_DECL_IMPORT)
-
-/*
- * Define IPC_EXPORT for exporting function & class.
-*/
-
-#ifndef IPC_EXPORT
-#if defined(LIBIPC_LIBRARY_SHARED_BUILDING__)
-#  define IPC_EXPORT IPC_DECL_EXPORT
-#elif defined(LIBIPC_LIBRARY_SHARED_USING__)
-#  define IPC_EXPORT IPC_DECL_IMPORT
-#else
-#  define IPC_EXPORT
-#endif
-#endif /*IPC_EXPORT*/
diff --git a/include/libipc/ipc.h b/include/libipc/ipc.h
deleted file mode 100755
index 64b262c9..00000000
--- a/include/libipc/ipc.h
+++ /dev/null
@@ -1,192 +0,0 @@
-#pragma once
-
-#include <string>
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-#include "libipc/buffer.h"
-#include "libipc/shm.h"
-
-namespace ipc {
-
-using handle_t = void*;
-using buff_t   = buffer;
-
-enum : unsigned {
-    sender,
-    receiver
-};
-
-template <typename Flag>
-struct IPC_EXPORT chan_impl {
-    static bool connect   (ipc::handle_t * ph, char const * name, unsigned mode);
-    static bool reconnect (ipc::handle_t * ph, unsigned mode);
-    static void disconnect(ipc::handle_t h);
-    static void destroy   (ipc::handle_t h);
-
-    static char const * name(ipc::handle_t h);
-
-    static std::size_t recv_count(ipc::handle_t h);
-    static bool wait_for_recv(ipc::handle_t h, std::size_t r_count, std::uint64_t tm);
-
-    static bool   send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm);
-    static buff_t recv(ipc::handle_t h, std::uint64_t tm);
-
-    static bool   try_send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm);
-    static buff_t try_recv(ipc::handle_t h);
-};
-
-template <typename Flag>
-class chan_wrapper {
-private:
-    using detail_t = chan_impl<Flag>;
-
-    ipc::handle_t h_ = nullptr;
-    unsigned mode_   = ipc::sender;
-    bool connected_  = false;
-
-public:
-    chan_wrapper() noexcept = default;
-
-    explicit chan_wrapper(char const * name, unsigned mode = ipc::sender)
-        : connected_{this->connect(name, mode)} {
-    }
-
-    chan_wrapper(chan_wrapper&& rhs) noexcept
-        : chan_wrapper{} {
-        swap(rhs);
-    }
-
-    ~chan_wrapper() {
-        detail_t::destroy(h_);
-    }
-
-    void swap(chan_wrapper& rhs) noexcept {
-        std::swap(h_        , rhs.h_);
-        std::swap(mode_     , rhs.mode_);
-        std::swap(connected_, rhs.connected_);
-    }
-
-    chan_wrapper& operator=(chan_wrapper rhs) noexcept {
-        swap(rhs);
-        return *this;
-    }
-
-    char const * name() const noexcept {
-        return detail_t::name(h_);
-    }
-
-    ipc::handle_t handle() const noexcept {
-        return h_;
-    }
-
-    bool valid() const noexcept {
-        return (handle() != nullptr);
-    }
-
-    unsigned mode() const noexcept {
-        return mode_;
-    }
-
-    chan_wrapper clone() const {
-        return chan_wrapper { name(), mode_ };
-    }
-
-    /**
-     * Building handle, then try connecting with name & mode flags.
-    */
-    bool connect(char const * name, unsigned mode = ipc::sender | ipc::receiver) {
-        if (name == nullptr || name[0] == '\0') return false;
-        detail_t::disconnect(h_); // clear old connection
-        return connected_ = detail_t::connect(&h_, name, mode_ = mode);
-    }
-
-    /**
-     * Try connecting with new mode flags.
-    */
-    bool reconnect(unsigned mode) {
-        if (!valid()) return false;
-        if (connected_ && (mode_ == mode)) return true;
-        return connected_ = detail_t::reconnect(&h_, mode_ = mode);
-    }
-
-    void disconnect() {
-        if (!valid()) return;
-        detail_t::disconnect(h_);
-        connected_ = false;
-    }
-
-    std::size_t recv_count() const {
-        return detail_t::recv_count(h_);
-    }
-
-    bool wait_for_recv(std::size_t r_count, std::uint64_t tm = invalid_value) const {
-        return detail_t::wait_for_recv(h_, r_count, tm);
-    }
-
-    static bool wait_for_recv(char const * name, std::size_t r_count, std::uint64_t tm = invalid_value) {
-        return chan_wrapper(name).wait_for_recv(r_count, tm);
-    }
-
-    /**
-     * If timeout, this function would call 'force_push' to send the data forcibly.
-    */
-    bool send(void const * data, std::size_t size, std::uint64_t tm = default_timeout) {
-        return detail_t::send(h_, data, size, tm);
-    }
-    bool send(buff_t const & buff, std::uint64_t tm = default_timeout) {
-        return this->send(buff.data(), buff.size(), tm);
-    }
-    bool send(std::string const & str, std::uint64_t tm = default_timeout) {
-        return this->send(str.c_str(), str.size() + 1, tm);
-    }
-
-    /**
-     * If timeout, this function would just return false.
-    */
-    bool try_send(void const * data, std::size_t size, std::uint64_t tm = default_timeout) {
-        return detail_t::try_send(h_, data, size, tm);
-    }
-    bool try_send(buff_t const & buff, std::uint64_t tm = default_timeout) {
-        return this->try_send(buff.data(), buff.size(), tm);
-    }
-    bool try_send(std::string const & str, std::uint64_t tm = default_timeout) {
-        return this->try_send(str.c_str(), str.size() + 1, tm);
-    }
-
-    buff_t recv(std::uint64_t tm = invalid_value) {
-        return detail_t::recv(h_, tm);
-    }
-
-    buff_t try_recv() {
-        return detail_t::try_recv(h_);
-    }
-};
-
-template <relat Rp, relat Rc, trans Ts>
-using chan = chan_wrapper<ipc::wr<Rp, Rc, Ts>>;
-
-/**
- * class route
- *
- * You could use one producer/server/sender for sending messages to a route,
- * then all the consumers/clients/receivers which are receiving with this route,
- * would receive your sent messages.
- *
- * A route could only be used in 1 to N
- * (one producer/writer to multi consumers/readers)
-*/
-
-using route = chan<relat::single, relat::multi, trans::broadcast>;
-
-/**
- * class channel
- *
- * You could use multi producers/writers for sending messages to a channel,
- * then all the consumers/readers which are receiving with this channel,
- * would receive your sent messages.
-*/
-
-using channel = chan<relat::multi, relat::multi, trans::broadcast>;
-
-} // namespace ipc
diff --git a/include/libipc/mutex.h b/include/libipc/mutex.h
index 2d4781ff..a6a6c539 100644
--- a/include/libipc/mutex.h
+++ b/include/libipc/mutex.h
@@ -1,39 +1,46 @@
+/**
+ * \file libipc/mutex.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A synchronization primitive that can be used to protect shared data 
+ *        from being simultaneously accessed by multiple processes.
+ */
 #pragma once
 
-#include <cstdint>  // std::uint64_t
-#include <system_error>
+#include <string>
+#include <cstddef>
+#include <cstdint>
+
+#include "libimp/export.h"
+#include "libimp/result.h"
+#include "libimp/span.h"
+#include "libimp/byte.h"
 
-#include "libipc/export.h"
 #include "libipc/def.h"
 
-namespace ipc {
-namespace sync {
+LIBIPC_NAMESPACE_BEG_
 
-class IPC_EXPORT mutex {
-    mutex(mutex const &) = delete;
-    mutex &operator=(mutex const &) = delete;
+struct mutex_handle;
+using mutex_t = mutex_handle *;
 
-public:
-    mutex();
-    explicit mutex(char const *name);
-    ~mutex();
+/// \brief Create or open a mutex object based on memory.
+LIBIMP_EXPORT ::LIBIMP::result<mutex_t> mutex_open(::LIBIMP::span<::LIBIMP::byte>) noexcept;
 
-    void const *native() const noexcept;
-    void *native() noexcept;
+/// \brief Close the mutex handle.
+/// \note The mutex object will be destroyed when the last handle is closed,
+///       and the lifetime of a mutex object needs to be shorter than 
+///       the memory specified when it is created or opened.
+LIBIMP_EXPORT ::LIBIMP::result<void> mutex_close(mutex_t) noexcept;
 
-    bool valid() const noexcept;
+/// \brief Gets the memory size of the specified mutex.
+LIBIMP_EXPORT ::LIBIMP::result<std::size_t> mutex_size(mutex_t) noexcept;
 
-    bool open(char const *name) noexcept;
-    void close() noexcept;
+/// \brief Locks the mutex, blocks if the mutex is not available.
+LIBIMP_EXPORT ::LIBIMP::result<bool> mutex_lock(mutex_t, std::int64_t ms) noexcept;
 
-    bool lock(std::uint64_t tm = ipc::invalid_value) noexcept;
-    bool try_lock() noexcept(false); // std::system_error
-    bool unlock() noexcept;
+/// \brief Tries to lock the mutex, returns if the mutex is not available.
+LIBIMP_EXPORT ::LIBIMP::result<bool> mutex_try_lock(mutex_t) noexcept;
 
-private:
-    class mutex_;
-    mutex_* p_;
-};
+/// \brief Unlocks the mutex.
+LIBIMP_EXPORT ::LIBIMP::result<bool> mutex_unlock(mutex_t) noexcept;
 
-} // namespace sync
-} // namespace ipc
+LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/pool_alloc.h b/include/libipc/pool_alloc.h
deleted file mode 100755
index a889be71..00000000
--- a/include/libipc/pool_alloc.h
+++ /dev/null
@@ -1,103 +0,0 @@
-#pragma once
-
-#include <new>
-#include <utility>
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-
-namespace ipc {
-namespace mem {
-
-class IPC_EXPORT pool_alloc {
-public:
-    static void* alloc(std::size_t size);
-    static void  free (void* p, std::size_t size);
-};
-
-////////////////////////////////////////////////////////////////
-/// construct/destruct an object
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-template <typename T>
-struct impl {
-    template <typename... P>
-    static T* construct(T* p, P&&... params) {
-        ::new (p) T(std::forward<P>(params)...);
-        return p;
-    }
-
-    static void destruct(T* p) {
-        reinterpret_cast<T*>(p)->~T();
-    }
-};
-
-template <typename T, size_t N>
-struct impl<T[N]> {
-    using type = T[N];
-
-    template <typename... P>
-    static type* construct(type* p, P&&... params) {
-        for (size_t i = 0; i < N; ++i) {
-            impl<T>::construct(&((*p)[i]), std::forward<P>(params)...);
-        }
-        return p;
-    }
-
-    static void destruct(type* p) {
-        for (size_t i = 0; i < N; ++i) {
-            impl<T>::destruct(&((*p)[i]));
-        }
-    }
-};
-
-} // namespace detail
-
-template <typename T, typename... P>
-T* construct(T* p, P&&... params) {
-    return detail::impl<T>::construct(p, std::forward<P>(params)...);
-}
-
-template <typename T, typename... P>
-T* construct(void* p, P&&... params) {
-    return construct(static_cast<T*>(p), std::forward<P>(params)...);
-}
-
-template <typename T>
-void destruct(T* p) {
-    return detail::impl<T>::destruct(p);
-}
-
-template <typename T>
-void destruct(void* p) {
-    destruct(static_cast<T*>(p));
-}
-
-////////////////////////////////////////////////////////////////
-/// general alloc/free
-////////////////////////////////////////////////////////////////
-
-inline void* alloc(std::size_t size) {
-    return pool_alloc::alloc(size);
-}
-
-template <typename T, typename... P>
-T* alloc(P&&... params) {
-    return construct<T>(pool_alloc::alloc(sizeof(T)), std::forward<P>(params)...);
-}
-
-inline void free(void* p, std::size_t size) {
-    pool_alloc::free(p, size);
-}
-
-template <typename T>
-void free(T* p) {
-    if (p == nullptr) return;
-    destruct(p);
-    pool_alloc::free(p, sizeof(T));
-}
-
-} // namespace mem
-} // namespace ipc
diff --git a/include/libipc/rw_lock.h b/include/libipc/rw_lock.h
deleted file mode 100755
index 31ed9de2..00000000
--- a/include/libipc/rw_lock.h
+++ /dev/null
@@ -1,171 +0,0 @@
-#pragma once
-
-#include <atomic>
-#include <thread>
-#include <chrono>
-#include <limits>
-#include <type_traits>
-#include <utility>
-
-////////////////////////////////////////////////////////////////
-/// Gives hint to processor that improves performance of spin-wait loops.
-////////////////////////////////////////////////////////////////
-
-#pragma push_macro("IPC_LOCK_PAUSE_")
-#undef  IPC_LOCK_PAUSE_
-
-#if defined(_MSC_VER)
-#include <windows.h>    // YieldProcessor
-/*
-    See: http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
-    Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
-*/
-#   define IPC_LOCK_PAUSE_() YieldProcessor()
-#elif defined(__GNUC__)
-#if defined(__i386__) || defined(__x86_64__)
-/*
-    See: Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
-         PAUSE-Spin Loop Hint, 4-57
-         http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
-*/
-#   define IPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
-#elif defined(__ia64__) || defined(__ia64)
-/*
-    See: Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
-         hint - Performance Hint, 3:145
-         http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
-*/
-#   define IPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
-#elif defined(__arm__)
-/*
-    See: ARM Architecture Reference Manuals (YIELD)
-         http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
-*/
-#   define IPC_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
-#endif
-#endif/*compilers*/
-
-#if !defined(IPC_LOCK_PAUSE_)
-/*
-    Just use a compiler fence, prevent compiler from optimizing loop
-*/
-#   define IPC_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
-#endif/*!defined(IPC_LOCK_PAUSE_)*/
-
-////////////////////////////////////////////////////////////////
-/// Yield to other threads
-////////////////////////////////////////////////////////////////
-
-namespace ipc {
-
-template <typename K>
-inline void yield(K& k) noexcept {
-    if (k < 4)  { /* Do nothing */ }
-    else
-    if (k < 16) { IPC_LOCK_PAUSE_(); }
-    else
-    if (k < 32) { std::this_thread::yield(); }
-    else {
-        std::this_thread::sleep_for(std::chrono::milliseconds(1));
-        return;
-    }
-    ++k;
-}
-
-template <std::size_t N = 32, typename K, typename F>
-inline void sleep(K& k, F&& f) {
-    if (k < static_cast<K>(N)) {
-        std::this_thread::yield();
-    }
-    else {
-        static_cast<void>(std::forward<F>(f)());
-        return;
-    }
-    ++k;
-}
-
-template <std::size_t N = 32, typename K>
-inline void sleep(K& k) {
-    sleep<N>(k, [] {
-        std::this_thread::sleep_for(std::chrono::milliseconds(1));
-    });
-}
-
-} // namespace ipc
-
-#pragma pop_macro("IPC_LOCK_PAUSE_")
-
-namespace ipc {
-
-class spin_lock {
-    std::atomic<unsigned> lc_ { 0 };
-
-public:
-    void lock(void) noexcept {
-        for (unsigned k = 0;
-             lc_.exchange(1, std::memory_order_acquire);
-             yield(k)) ;
-    }
-
-    void unlock(void) noexcept {
-        lc_.store(0, std::memory_order_release);
-    }
-};
-
-class rw_lock {
-    using lc_ui_t = unsigned;
-
-    std::atomic<lc_ui_t> lc_ { 0 };
-
-    enum : lc_ui_t {
-        w_mask = (std::numeric_limits<std::make_signed_t<lc_ui_t>>::max)(), // b 0111 1111
-        w_flag = w_mask + 1                                                 // b 1000 0000
-    };
-
-public:
-    rw_lock() = default;
-
-    rw_lock(const rw_lock&) = delete;
-    rw_lock& operator=(const rw_lock&) = delete;
-    rw_lock(rw_lock&&) = delete;
-    rw_lock& operator=(rw_lock&&) = delete;
-
-    void lock() noexcept {
-        for (unsigned k = 0;;) {
-            auto old = lc_.fetch_or(w_flag, std::memory_order_acq_rel);
-            if (!old) return;           // got w-lock
-            if (!(old & w_flag)) break; // other thread having r-lock
-            yield(k);                   // other thread having w-lock
-        }
-        // wait for reading finished
-        for (unsigned k = 0;
-             lc_.load(std::memory_order_acquire) & w_mask;
-             yield(k)) ;
-    }
-
-    void unlock() noexcept {
-        lc_.store(0, std::memory_order_release);
-    }
-
-    void lock_shared() noexcept {
-        auto old = lc_.load(std::memory_order_acquire);
-        for (unsigned k = 0;;) {
-            // if w_flag set, just continue
-            if (old & w_flag) {
-                yield(k);
-                old = lc_.load(std::memory_order_acquire);
-            }
-            // otherwise try cas lc + 1 (set r-lock)
-            else if (lc_.compare_exchange_weak(old, old + 1, std::memory_order_release)) {
-                return;
-            }
-            // set r-lock failed, old has been updated
-        }
-    }
-
-    void unlock_shared() noexcept {
-        lc_.fetch_sub(1, std::memory_order_release);
-    }
-};
-
-} // namespace ipc
diff --git a/include/libipc/semaphore.h b/include/libipc/semaphore.h
deleted file mode 100644
index 7f557e2f..00000000
--- a/include/libipc/semaphore.h
+++ /dev/null
@@ -1,37 +0,0 @@
-#pragma once
-
-#include <cstdint>  // std::uint64_t
-
-#include "libipc/export.h"
-#include "libipc/def.h"
-
-namespace ipc {
-namespace sync {
-
-class IPC_EXPORT semaphore {
-    semaphore(semaphore const &) = delete;
-    semaphore &operator=(semaphore const &) = delete;
-
-public:
-    semaphore();
-    explicit semaphore(char const *name, std::uint32_t count = 0);
-    ~semaphore();
-
-    void const *native() const noexcept;
-    void *native() noexcept;
-
-    bool valid() const noexcept;
-
-    bool open(char const *name, std::uint32_t count = 0) noexcept;
-    void close() noexcept;
-
-    bool wait(std::uint64_t tm = ipc::invalid_value) noexcept;
-    bool post(std::uint32_t count = 1) noexcept;
-
-private:
-    class semaphore_;
-    semaphore_* p_;
-};
-
-} // namespace sync
-} // namespace ipc
diff --git a/include/libipc/shm.h b/include/libipc/shm.h
old mode 100755
new mode 100644
index 12e32237..93206541
--- a/include/libipc/shm.h
+++ b/include/libipc/shm.h
@@ -1,59 +1,77 @@
-#pragma once
-
-#include <cstddef>
-#include <cstdint>
-
-#include "libipc/export.h"
-
-namespace ipc {
-namespace shm {
-
-using id_t = void*;
-
-enum : unsigned {
-    create = 0x01,
-    open   = 0x02
-};
-
-IPC_EXPORT id_t         acquire(char const * name, std::size_t size, unsigned mode = create | open);
-IPC_EXPORT void *       get_mem(id_t id, std::size_t * size);
-IPC_EXPORT std::int32_t release(id_t id);
-IPC_EXPORT void         remove (id_t id);
-IPC_EXPORT void         remove (char const * name);
-
-IPC_EXPORT std::int32_t get_ref(id_t id);
-IPC_EXPORT void sub_ref(id_t id);
-
-class IPC_EXPORT handle {
-public:
-    handle();
-    handle(char const * name, std::size_t size, unsigned mode = create | open);
-    handle(handle&& rhs);
-
-    ~handle();
-
-    void swap(handle& rhs);
-    handle& operator=(handle rhs);
-
-    bool         valid() const noexcept;
-    std::size_t  size () const noexcept;
-    char const * name () const noexcept;
-
-    std::int32_t ref() const noexcept;
-    void sub_ref() noexcept;
-
-    bool acquire(char const * name, std::size_t size, unsigned mode = create | open);
-    std::int32_t release();
-
-    void* get() const;
-
-    void attach(id_t);
-    id_t detach();
-
-private:
-    class handle_;
-    handle_* p_;
-};
-
-} // namespace shm
-} // namespace ipc
+/**
+ * \file libipc/shm.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the shared memory access interface
+ * \date 2022-04-17
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+
+#include "libimp/export.h"
+#include "libimp/result.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+struct shm_handle;
+using shm_t = shm_handle *;
+
+/// \brief Create a new shared memory handle with a name of the shared memory file.
+LIBIMP_EXPORT ::LIBIMP::result<shm_t> shm_open(std::string name, 
+                                               std::size_t size = 0,
+                                               mode::type = mode::create | mode::open) noexcept;
+
+/// \brief Close the shared memory handle.
+LIBIMP_EXPORT ::LIBIMP::result<void> shm_close(shm_t) noexcept;
+
+/// \brief Gets the name of the shared memory file based on the shared memory handle.
+/// \return empty string on failure.
+LIBIMP_EXPORT std::string shm_name(shm_t) noexcept;
+
+/// \brief Gets a memory pointer based on the shared memory handle.
+/// \return nullptr on failure.
+LIBIMP_EXPORT void *shm_get(shm_t) noexcept;
+
+/// \brief Gets the memory size based on the shared memory handle.
+/// \return 0 on failure.
+LIBIMP_EXPORT std::size_t shm_size(shm_t) noexcept;
+
+/// \brief Sets the memory size based on the shared memory handle.
+/// \remark [TBD]
+LIBIMP_EXPORT ::LIBIMP::result_code shm_size(shm_t, std::size_t) noexcept;
+
+/**
+ * \brief The shared memory object.
+ */
+class LIBIMP_EXPORT shared_memory {
+  shm_t shm_;
+
+public:
+  explicit shared_memory() noexcept;
+  ~shared_memory() noexcept;
+
+  shared_memory(shared_memory &&other) noexcept;
+  shared_memory &operator=(shared_memory &&rhs) & noexcept;
+  void swap(shared_memory &other) noexcept;
+
+  explicit shared_memory(std::string name, 
+                         std::size_t size = 0, 
+                         mode::type = mode::create | mode::open) noexcept;
+
+  bool open(std::string name, std::size_t size, mode::type) noexcept;
+  void close() noexcept;
+  bool valid() const noexcept;
+
+  void *get() const noexcept;
+  void *operator*() const noexcept;
+  template <typename T>
+  T *as() { return static_cast<T *>(get()); }
+
+  std::size_t size() const noexcept;
+  std::string name() const noexcept;
+};
+
+LIBIPC_NAMESPACE_END_
diff --git a/include/libipc/spin_lock.h b/include/libipc/spin_lock.h
new file mode 100644
index 00000000..c4a4059e
--- /dev/null
+++ b/include/libipc/spin_lock.h
@@ -0,0 +1,86 @@
+/**
+ * \file libipc/spin_lock.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define spin locks
+ * \date 2022-02-27
+ */
+#pragma once
+
+#include <atomic>
+#include <thread>
+#include <chrono>
+#include <utility>
+
+#include "libimp/export.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+/**
+ * \brief Gives hint to processor that improves performance of spin-wait loops.
+*/
+LIBIMP_EXPORT void pause() noexcept;
+
+/**
+ * \brief Yield to other threads
+*/
+
+template <typename K>
+inline void yield(K &k) noexcept {
+  if (k < 4)  { /* Do nothing */ }
+  else
+  if (k < 16) { pause(); }
+  else
+  if (k < 32) { std::this_thread::yield(); }
+  else {
+    std::this_thread::sleep_for(std::chrono::microseconds(1));
+    return;
+  }
+  ++k;
+}
+
+template <std::size_t N = 32, typename K, typename F>
+inline void sleep(K &k, F &&f) {
+  if (k < static_cast<K>(N)) {
+    std::this_thread::yield();
+  }
+  else {
+    static_cast<void>(std::forward<F>(f)());
+    return;
+  }
+  ++k;
+}
+
+template <std::size_t N = 32, typename K>
+inline void sleep(K &k) {
+  sleep<N>(k, [] {
+    std::this_thread::sleep_for(std::chrono::microseconds(1));
+  });
+}
+
+/**
+ * \brief Basic spin lock
+*/
+class LIBIMP_EXPORT spin_lock {
+  std::atomic<unsigned> lc_ {0};
+
+public:
+  void lock() noexcept;
+  void unlock() noexcept;
+};
+
+/**
+ * \brief Support for shared mode spin lock
+*/
+class LIBIMP_EXPORT rw_lock {
+  std::atomic<unsigned> lc_ {0};
+
+public:
+  void lock() noexcept;
+  void unlock() noexcept;
+  void lock_shared() noexcept;
+  void unlock_shared() noexcept;
+};
+
+LIBIPC_NAMESPACE_END_
diff --git a/include/libpmr/allocator.h b/include/libpmr/allocator.h
new file mode 100644
index 00000000..d4ebce21
--- /dev/null
+++ b/include/libpmr/allocator.h
@@ -0,0 +1,132 @@
+/**
+ * \file libpmr/allocator.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A generic polymorphic memory allocator.
+ * \date 2022-11-13
+ */
+#pragma once
+
+#include <type_traits>
+#include <array>
+
+#include "libimp/export.h"
+#include "libimp/uninitialized.h"
+#include "libimp/byte.h"
+
+#include "libpmr/def.h"
+#include "libpmr/memory_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \brief An allocator which exhibits different allocation behavior 
+ *        depending upon the memory resource from which it is constructed.
+ * 
+ * \note Unlike `std::pmr::polymorphic_allocator`, it does not 
+ *       rely on a specific inheritance relationship and only restricts 
+ *       the interface behavior of the incoming memory resource object to 
+ *       conform to `std::pmr::memory_resource`.
+ * 
+ * \see https://en.cppreference.com/w/cpp/memory/memory_resource
+ *      https://en.cppreference.com/w/cpp/memory/polymorphic_allocator
+ */
+class LIBIMP_EXPORT allocator {
+
+  class holder_mr_base {
+  public:
+    virtual ~holder_mr_base() noexcept = default;
+    virtual void *alloc(std::size_t, std::size_t) const = 0;
+    virtual void  dealloc(void *, std::size_t, std::size_t) const = 0;
+  };
+
+  template <typename MR, typename = bool>
+  class holder_mr;
+
+  /**
+   * \brief An empty holding class used to calculate a reasonable memory size for the holder.
+   * \tparam MR cannot be converted to the type of memory resource
+   */
+  template <typename MR, typename U>
+  class holder_mr : public holder_mr_base {
+  protected:
+    MR *res_;
+
+  public:
+    holder_mr(MR *p_mr) noexcept
+      : res_(p_mr) {}
+
+    // [MSVC] error C2259: 'pmr::allocator::holder_mr<void *,bool>': cannot instantiate abstract class.
+    void *alloc(std::size_t s, std::size_t a) const override { return nullptr; }
+    void dealloc(void *p, std::size_t s, std::size_t a) const override {}
+  };
+
+  /**
+   * \brief A memory resource pointer holder class for type erasure.
+   * \tparam MR memory resource type
+   */
+  template <typename MR>
+  class holder_mr<MR, verify_memory_resource<MR>> : public holder_mr<MR, void> {
+    using base_t = holder_mr<MR, void>;
+
+  public:
+    holder_mr(MR *p_mr) noexcept
+      : base_t{p_mr} {}
+
+    void *alloc(std::size_t s, std::size_t a) const override {
+      return base_t::res_->allocate(s, a);
+    }
+
+    void dealloc(void *p, std::size_t s, std::size_t a) const override {
+      base_t::res_->deallocate(p, s, a);
+    }
+  };
+
+  using void_holder_t = holder_mr<void *>;
+  alignas(void_holder_t) std::array<::LIBIMP::byte, sizeof(void_holder_t)> holder_;
+
+  holder_mr_base &      get_holder() noexcept;
+  holder_mr_base const &get_holder() const noexcept;
+
+public:
+  /// \brief Constructs an `allocator` using the return value of 
+  ///       `new_delete_resource::get()` as the underlying memory resource.
+  allocator() noexcept;
+  ~allocator() noexcept;
+
+  allocator(allocator const &other) noexcept = default;
+  allocator &operator=(allocator const &other) & noexcept = default;
+
+  allocator(allocator &&other) noexcept = default;
+  allocator &operator=(allocator &&other) & noexcept = default;
+
+  /// \brief Constructs a allocator from a memory resource pointer.
+  /// \note The lifetime of the pointer must be longer than that of allocator.
+  template <typename T, verify_memory_resource<T> = true>
+  allocator(T *p_mr) noexcept {
+    if (p_mr == nullptr) {
+      ::LIBIMP::construct<holder_mr<new_delete_resource>>(holder_.data(), new_delete_resource::get());
+      return;
+    }
+    ::LIBIMP::construct<holder_mr<T>>(holder_.data(), p_mr);
+  }
+
+  void swap(allocator &other) noexcept;
+
+  /// \brief Allocate/deallocate memory.
+  void *allocate(std::size_t s, std::size_t = alignof(std::max_align_t)) const;
+  void  deallocate(void *p, std::size_t s, std::size_t = alignof(std::max_align_t)) const;
+
+  /// \brief Allocates uninitialized memory and constructs an object of type T in the memory.
+  template <typename T, typename... A>
+  T *construct(A &&...args) const {
+    return ::LIBIMP::construct<T>(allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
+  }
+
+  /// \brief Calls the destructor of the object pointed to by p and deallocates the memory.
+  template <typename T>
+  void destroy(T *p) const noexcept {
+    deallocate(::LIBIMP::destroy(p), sizeof(T), alignof(T));
+  }
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/block_pool.h b/include/libpmr/block_pool.h
new file mode 100644
index 00000000..7fc11419
--- /dev/null
+++ b/include/libpmr/block_pool.h
@@ -0,0 +1,245 @@
+/**
+ * \file libpmr/block_pool.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Fixed-length memory block pool.
+ * \date 2023-11-18
+ */
+#pragma once
+
+#include <cstddef>
+#include <new>
+#include <array>
+#include <deque>
+#include <utility>
+
+#include "libimp/byte.h"
+#include "libimp/export.h"
+#include "libconcur/intrusive_stack.h"
+
+#include "libpmr/def.h"
+#include "libpmr/allocator.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/// \brief Get the central cache allocator.
+/// \note The central cache allocator is used to allocate memory for the central cache pool.
+///       The underlying memory resource is a `monotonic_buffer_resource` with a fixed-size buffer.
+LIBIMP_EXPORT allocator &central_cache_allocator() noexcept;
+
+/**
+ * \brief The block type.
+ * \tparam BlockSize specifies the memory block size
+*/
+template <std::size_t BlockSize>
+union block {
+  block *next;
+  alignas(std::max_align_t) std::array<::LIBIMP::byte, BlockSize> storage;
+};
+
+/**
+ * \brief A fixed-length memory block central cache pool.
+ * \tparam BlockT specifies the memory block type
+ */
+template <typename BlockT, std::size_t BlockPoolExpansion>
+class central_cache_pool {
+
+  /// \brief The block type, which should be a union of a pointer and a storage.
+  using block_t = BlockT;
+  /// \brief The chunk type, which is an array of blocks.
+  using chunk_t = std::array<block_t, BlockPoolExpansion>;
+  /// \brief The node type, which is used to store the block pointer.
+  using node_t = typename ::LIBCONCUR::intrusive_stack<block_t *>::node;
+
+  /// \brief The central cache stack.
+  ::LIBCONCUR::intrusive_stack<block_t *> cached_;
+  ::LIBCONCUR::intrusive_stack<block_t *> aqueired_;
+
+  central_cache_pool() noexcept = default;
+
+public:
+  block_t *aqueire() noexcept {
+    auto *n = cached_.pop();
+    if (n != nullptr) {
+      aqueired_.push(n);
+      return n->value;
+    }
+    auto *chunk = central_cache_allocator().construct<chunk_t>();
+    if (chunk == nullptr) {
+      return nullptr;
+    }
+    for (std::size_t i = 0; i < BlockPoolExpansion - 1; ++i) {
+      (*chunk)[i].next = &(*chunk)[i + 1];
+    }
+    chunk->back().next = nullptr;
+    return chunk->data();
+  }
+
+  void release(block_t *p) noexcept {
+    if (p == nullptr) return;
+    auto *a = aqueired_.pop();
+    if (a == nullptr) {
+      a = central_cache_allocator().construct<node_t>();
+      if (a == nullptr) return;
+    }
+    a->value = p;
+    cached_.push(a);
+  }
+
+  /// \brief Get the singleton instance.
+  static central_cache_pool &instance() noexcept {
+    static central_cache_pool pool;
+    return pool;
+  }
+};
+
+/// \brief A fixed-length memory block central cache pool with no default expansion size.
+template <typename BlockT>
+class central_cache_pool<BlockT, 0> {
+
+  /// \brief The block type, which should be a union of a pointer and a storage.
+  using block_t = BlockT;
+  /// \brief The node type, which is used to store the block pointer.
+  using node_t = typename ::LIBCONCUR::intrusive_stack<block_t *>::node;
+
+  /// \brief The central cache stack.
+  ::LIBCONCUR::intrusive_stack<block_t *> cached_;
+  ::LIBCONCUR::intrusive_stack<block_t *> aqueired_;
+
+  central_cache_pool() noexcept = default;
+
+public:
+  block_t *aqueire() noexcept {
+    auto *n = cached_.pop();
+    if (n != nullptr) {
+      aqueired_.push(n);
+      return n->value;
+    }
+    // For pools with no default expansion size, 
+    // the central cache pool is only buffered, not allocated.
+    return nullptr;
+  }
+
+  void release(block_t *p) noexcept {
+    if (p == nullptr) return;
+    auto *a = aqueired_.pop();
+    if (a == nullptr) {
+      a = central_cache_allocator().construct<node_t>();
+      if (a == nullptr) return;
+    }
+    a->value = p;
+    cached_.push(a);
+  }
+
+  /// \brief Get the singleton instance.
+  static central_cache_pool &instance() noexcept {
+    static central_cache_pool pool;
+    return pool;
+  }
+};
+
+/**
+ * \brief Fixed-length memory block pool.
+ * \tparam BlockSize specifies the memory block size
+ * \tparam BlockPoolExpansion specifies the default number of blocks to expand when the block pool is exhausted
+ */
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+class block_pool;
+
+/// \brief General-purpose block pool for any size of memory block.
+/// \note This block pool can only be used to deallocate a group of memory blocks of unknown but consistent size, 
+///       and cannot be used for memory block allocation.
+template <>
+class block_pool<0, 0> {
+
+  template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+  friend class block_pool;
+
+  /// \brief The block type.
+  struct block_t {
+    block_t *next;
+  };
+
+  /// \brief The central cache pool type.
+  using central_cache_pool_t = central_cache_pool<block_t, 0>;
+
+public:
+  static constexpr std::size_t block_size = 0;
+
+  block_pool() noexcept : cursor_(central_cache_pool_t::instance().aqueire()) {}
+  ~block_pool() noexcept {
+    central_cache_pool_t::instance().release(cursor_);
+  }
+
+  block_pool(block_pool const &) = delete;
+  block_pool& operator=(block_pool const &) = delete;
+
+  block_pool(block_pool &&rhs) noexcept : cursor_(std::exchange(rhs.cursor_, nullptr)) {}
+  block_pool &operator=(block_pool &&) noexcept = delete;
+
+  void deallocate(void *p) noexcept {
+    if (p == nullptr) return;
+    block_t *b = static_cast<block_t *>(p);
+    b->next = cursor_;
+    cursor_ = b;
+  }
+
+private:
+  block_t *cursor_;
+};
+
+/// \brief A block pool for a block of memory of a specific size.
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+class block_pool {
+
+  /// \brief The block type.
+  using block_t = block<BlockSize>;
+  /// \brief The central cache pool type.
+  using central_cache_pool_t = central_cache_pool<block_t, BlockPoolExpansion>;
+
+  /// \brief Expand the block pool when it is exhausted.
+  block_t *expand() noexcept {
+    return central_cache_pool_t::instance().aqueire();
+  }
+
+public:
+  static constexpr std::size_t block_size = BlockSize;
+
+  block_pool() noexcept : cursor_(expand()) {}
+  ~block_pool() noexcept {
+    central_cache_pool_t::instance().release(cursor_);
+  }
+
+  block_pool(block_pool const &) = delete;
+  block_pool& operator=(block_pool const &) = delete;
+
+  block_pool(block_pool &&rhs) noexcept
+    : cursor_(std::exchange(rhs.cursor_, nullptr)) {}
+  block_pool &operator=(block_pool &&) noexcept = delete;
+
+  /// \brief Used to take all memory blocks from within a general-purpose block pool.
+  /// \note Of course, the actual memory blocks they manage must be the same size.
+  block_pool(block_pool<0, 0> &&rhs) noexcept
+    : cursor_(reinterpret_cast<block_t *>(std::exchange(rhs.cursor_, nullptr))) {}
+
+  void *allocate() noexcept {
+    if (cursor_ == nullptr) {
+      cursor_ = expand();
+      if (cursor_ == nullptr) return nullptr;
+    }
+    block_t *p = cursor_;
+    cursor_ = cursor_->next;
+    return p->storage.data();
+  }
+
+  void deallocate(void *p) noexcept {
+    if (p == nullptr) return;
+    block_t *b = static_cast<block_t *>(p);
+    b->next = cursor_;
+    cursor_ = b;
+  }
+
+private:
+  block_t *cursor_;
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/def.h b/include/libpmr/def.h
new file mode 100644
index 00000000..6e903e6d
--- /dev/null
+++ b/include/libpmr/def.h
@@ -0,0 +1,23 @@
+/**
+ * \file libpmr/def.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Define the trivial configuration information for memory resources.
+ * \date 2022-11-13
+ */
+#pragma once
+
+#include <cstddef>
+
+#define LIBPMR                pmr
+#define LIBPMR_NAMESPACE_BEG_ namespace LIBPMR {
+#define LIBPMR_NAMESPACE_END_ }
+
+LIBPMR_NAMESPACE_BEG_
+
+/// \brief Constants.
+
+enum : std::size_t {
+  central_cache_default_size = 1024 * 1024, ///< 1MB
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/memory_resource.h b/include/libpmr/memory_resource.h
new file mode 100644
index 00000000..27aa5dd7
--- /dev/null
+++ b/include/libpmr/memory_resource.h
@@ -0,0 +1,65 @@
+/**
+ * \file libpmr/memory_resource.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Implement memory allocation strategies that can be used by pmr::allocator.
+ * \date 2022-11-13
+ */
+#pragma once
+
+#include <type_traits>
+#include <cstddef>  // std::size_t, std::max_align_t
+
+#include "libimp/export.h"
+#include "libpmr/def.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/// \brief Helper trait for memory resource.
+
+template <typename T, typename = void>
+struct has_allocate : std::false_type {};
+
+template <typename T>
+struct has_allocate<T, 
+  typename std::enable_if<std::is_convertible<
+  decltype(std::declval<T &>().allocate(std::declval<std::size_t>(), 
+                                        std::declval<std::size_t>())), void *
+  >::value>::type> : std::true_type {};
+
+template <typename T, typename = void>
+struct has_deallocate : std::false_type {};
+
+template <typename T>
+struct has_deallocate<T, 
+  decltype(std::declval<T &>().deallocate(std::declval<void *>(), 
+                                          std::declval<std::size_t>(), 
+                                          std::declval<std::size_t>()))
+  > : std::true_type {};
+
+template <typename T>
+using verify_memory_resource = 
+  std::enable_if_t<has_allocate  <T>::value && 
+                   has_deallocate<T>::value, bool>;
+
+/**
+ * \class LIBIMP_EXPORT new_delete_resource
+ * \brief A memory resource that uses the 
+ *        standard memory allocation and deallocation interface to allocate memory.
+ * \see https://en.cppreference.com/w/cpp/memory/new_delete_resource
+ */
+class LIBIMP_EXPORT new_delete_resource {
+public:
+  /// \brief Returns a pointer to a `new_delete_resource`.
+  static new_delete_resource *get() noexcept;
+
+  /// \brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
+  /// \remark Returns nullptr if storage of the requested size and alignment cannot be obtained.
+  /// \see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
+  void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
+
+  /// \brief Deallocates the storage pointed to by p.
+  /// \see https://en.cppreference.com/w/cpp/memory/memory_resource/deallocate
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/monotonic_buffer_resource.h b/include/libpmr/monotonic_buffer_resource.h
new file mode 100644
index 00000000..d2ffb5b1
--- /dev/null
+++ b/include/libpmr/monotonic_buffer_resource.h
@@ -0,0 +1,62 @@
+/**
+ * \file libpmr/monotonic_buffer_resource.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief A special-purpose the `allocator` that releases the allocated memory only when the resource is destroyed.
+ * \date 2023-09-16
+ */
+#pragma once
+
+#include <cstddef>  // std::size_t, std::max_align_t
+
+#include "libimp/export.h"
+#include "libimp/span.h"
+#include "libimp/byte.h"
+
+#include "libpmr/def.h"
+#include "libpmr/allocator.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \class LIBIMP_EXPORT monotonic_buffer_resource
+ * \brief A special-purpose memory resource class 
+ *        that releases the allocated memory only when the resource is destroyed.
+ * \see https://en.cppreference.com/w/cpp/memory/monotonic_buffer_resource
+ */
+class LIBIMP_EXPORT monotonic_buffer_resource {
+
+  allocator upstream_;
+
+  struct node {
+    node *next;
+    std::size_t size;
+  } *free_list_;
+
+  ::LIBIMP::byte *head_;
+  ::LIBIMP::byte *tail_;
+  std::size_t next_size_;
+
+  ::LIBIMP::byte * const initial_buffer_;
+  std::size_t const initial_size_;
+
+public:
+  monotonic_buffer_resource() noexcept;
+  explicit monotonic_buffer_resource(allocator upstream) noexcept;
+  explicit monotonic_buffer_resource(std::size_t initial_size) noexcept;
+  monotonic_buffer_resource(std::size_t initial_size, allocator upstream) noexcept;
+  monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept;
+  monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer, allocator upstream) noexcept;
+
+  ~monotonic_buffer_resource() noexcept;
+
+  monotonic_buffer_resource(monotonic_buffer_resource const &) = delete;
+  monotonic_buffer_resource &operator=(monotonic_buffer_resource const &) = delete;
+
+  allocator upstream_resource() const noexcept;
+  void release() noexcept;
+
+  void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept;
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/new.h b/include/libpmr/new.h
new file mode 100644
index 00000000..ab1dfb0e
--- /dev/null
+++ b/include/libpmr/new.h
@@ -0,0 +1,180 @@
+/**
+ * \file libpmr/new.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Global object creation function.
+ * \date 2024-01-01
+ */
+#pragma once
+
+#include <cstddef>
+#include <algorithm>
+#include <type_traits>
+
+#include "libimp/aligned.h"
+#include "libimp/uninitialized.h"
+#include "libimp/byte.h"
+#include "libimp/detect_plat.h"
+#include "libimp/export.h"
+
+#include "libpmr/def.h"
+#include "libpmr/block_pool.h"
+#include "libpmr/memory_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/// \brief Defines the memory block collector interface.
+class LIBIMP_EXPORT block_collector {
+public:
+  virtual ~block_collector() noexcept = default;
+  virtual void recycle(void *p, std::size_t bytes, std::size_t alignment) noexcept = 0;
+};
+
+#if defined(LIBIMP_CPP_17)
+using get_block_collector_t = block_collector *(*)() noexcept;
+#else
+using get_block_collector_t = block_collector *(*)();
+#endif
+
+static constexpr std::size_t regular_head_size
+    = ::LIBIMP::round_up(sizeof(get_block_collector_t), alignof(std::max_align_t));
+
+/// \brief Select the incremental level based on the size.
+constexpr inline std::size_t regular_level(std::size_t s) noexcept {
+  return (s <= 128  ) ? 0 :
+         (s <= 1024 ) ? 1 :
+         (s <= 8192 ) ? 2 :
+         (s <= 65536) ? 3 : 4;
+}
+
+/// \brief Calculates the appropriate memory block size based on the increment level and size.
+constexpr inline std::size_t regular_sizeof_impl(std::size_t l, std::size_t s) noexcept {
+  return (l == 0) ? ::LIBIMP::round_up<std::size_t>(s, regular_head_size) :
+         (l == 1) ? ::LIBIMP::round_up<std::size_t>(s, 128 ) :
+         (l == 2) ? ::LIBIMP::round_up<std::size_t>(s, 1024) :
+         (l == 3) ? ::LIBIMP::round_up<std::size_t>(s, 8192) : (std::numeric_limits<std::size_t>::max)();
+}
+
+/// \brief Calculates the appropriate memory block size based on the size.
+constexpr inline std::size_t regular_sizeof_impl(std::size_t s) noexcept {
+  return regular_sizeof_impl(regular_level(s), s);
+}
+
+/// \brief Calculates the appropriate memory block size based on the specific type.
+template <typename T>
+constexpr inline std::size_t regular_sizeof() noexcept {
+  return regular_sizeof_impl(regular_head_size + sizeof(T));
+}
+
+/// \brief Use block pools to handle memory less than 64K.
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+class block_resource_base : public block_pool<BlockSize, BlockPoolExpansion> {
+public:
+  void *allocate(std::size_t /*bytes*/, std::size_t /*alignment*/) noexcept {
+    return block_pool<BlockSize, BlockPoolExpansion>::allocate();
+  }
+
+  void deallocate(void *p, std::size_t /*bytes*/, std::size_t /*alignment*/) noexcept {
+    block_pool<BlockSize, BlockPoolExpansion>::deallocate(p);
+  }
+};
+
+/// \brief Use `new`/`delete` to handle memory larger than 64K.
+template <std::size_t BlockSize>
+class block_resource_base<BlockSize, 0> : public new_delete_resource {
+public:
+  void *allocate(std::size_t bytes, std::size_t alignment) noexcept {
+    return new_delete_resource::allocate(regular_head_size + bytes, alignment);
+  }
+
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
+    new_delete_resource::deallocate(p, regular_head_size + bytes, alignment);
+  }
+};
+
+/// \brief Defines block pool memory resource based on block pool.
+template <std::size_t BlockSize, std::size_t BlockPoolExpansion>
+class block_pool_resource : public block_resource_base<BlockSize, BlockPoolExpansion>
+                          , public block_collector {
+
+  using base_t = block_resource_base<BlockSize, BlockPoolExpansion>;
+
+  void recycle(void *p, std::size_t bytes, std::size_t alignment) noexcept override {
+    base_t::deallocate(p, bytes, alignment);
+  }
+
+public:
+  static block_collector *get() noexcept {
+    thread_local block_pool_resource instance;
+    return &instance;
+  }
+
+  void *allocate(std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept {
+    void *p = base_t::allocate(bytes, alignment);
+    *static_cast<get_block_collector_t *>(p) = get;
+    return static_cast<::LIBIMP::byte *>(p) + regular_head_size;
+  }
+
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment = alignof(std::max_align_t)) noexcept {
+    p = static_cast<::LIBIMP::byte *>(p) - regular_head_size;
+    auto g = *static_cast<get_block_collector_t *>(p);
+    if (g == get) {
+      base_t::deallocate(p, bytes, alignment);
+      return;
+    }
+    g()->recycle(p, bytes, alignment);
+  }
+};
+
+/// \brief Different increment levels match different chunk sizes.
+///        512 means that 512 consecutive memory blocks are allocated at a time.
+template <std::size_t L>
+constexpr std::size_t block_pool_expansion = 0;
+
+template <> constexpr std::size_t block_pool_expansion<0> = 512;
+template <> constexpr std::size_t block_pool_expansion<1> = 256;
+template <> constexpr std::size_t block_pool_expansion<2> = 128;
+template <> constexpr std::size_t block_pool_expansion<3> = 64;
+
+/// \brief Matches the appropriate memory block resource based on the specified type.
+template <typename T, std::size_t N = regular_sizeof<T>(), std::size_t L = regular_level(N)>
+auto *get_regular_resource() noexcept {
+  using block_poll_resource_t = block_pool_resource<N, block_pool_expansion<L>>;
+  return dynamic_cast<block_poll_resource_t *>(block_poll_resource_t::get());
+}
+
+/// \brief Creates an object based on the specified type and parameters with block pool resource.
+/// \note This function is thread-safe.
+template <typename T, typename... A>
+T *$new(A &&... args) noexcept {
+  auto *res = get_regular_resource<T>();
+  if (res == nullptr) return nullptr;
+  return ::LIBIMP::construct<T>(res->allocate(sizeof(T), alignof(T)), std::forward<A>(args)...);
+}
+
+/// \brief Destroys object previously allocated by the `$new` and releases obtained memory area.
+/// \note This function is thread-safe. If the pointer type passed in is different from `$new`, 
+///       additional performance penalties may be incurred.
+template <typename T>
+void $delete(T *p) noexcept {
+  if (p == nullptr) return;
+  ::LIBIMP::destroy(p);
+  auto *res = get_regular_resource<T>();
+  if (res == nullptr) return;
+#if (LIBIMP_CC_MSVC > LIBIMP_CC_MSVC_2015)
+  res->deallocate(p, sizeof(T), alignof(T));
+#else
+  // `alignof` of vs2015 requires that type must be able to be instantiated.
+  res->deallocate(p, sizeof(T));
+#endif
+}
+
+/// \brief The destruction policy used by std::unique_ptr.
+/// \see https://en.cppreference.com/w/cpp/memory/default_delete
+struct deleter {
+  template <typename T>
+  void operator()(T *p) const noexcept {
+    $delete(p);
+  }
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/include/libpmr/small_storage.h b/include/libpmr/small_storage.h
new file mode 100644
index 00000000..aee998df
--- /dev/null
+++ b/include/libpmr/small_storage.h
@@ -0,0 +1,606 @@
+/**
+ * \file libpmr/small_storage.h
+ * \author mutouyun (orz@orzz.org)
+ * \brief Unified SSO (Small Size Optimization).
+ * \date 2023-09-02
+ */
+#pragma once
+
+#include <type_traits>
+#include <array>
+#include <typeinfo>
+#include <utility>
+#include <memory>
+#include <cstddef>
+
+#include "libimp/export.h"
+#include "libimp/uninitialized.h"
+#include "libimp/byte.h"
+#include "libimp/generic.h"
+#include "libimp/aligned.h"
+#include "libimp/log.h"
+
+#include "libpmr/def.h"
+#include "libpmr/allocator.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \class holder_base
+ * \brief Data holder base class.
+*/
+class holder_base {
+
+  // non-copyable
+  holder_base(holder_base const &) = delete;
+  holder_base &operator=(holder_base const &) = delete;
+
+public:
+  holder_base() noexcept = default;
+  virtual ~holder_base() noexcept = default;
+  virtual bool valid() const noexcept = 0;
+  virtual std::type_info const &type() const noexcept = 0;
+  virtual std::size_t sizeof_type() const noexcept = 0;
+  virtual std::size_t sizeof_heap() const noexcept = 0;
+  virtual std::size_t count() const noexcept = 0;
+  virtual void *get() noexcept = 0;
+  virtual void const *get() const noexcept = 0;
+
+  /// \brief The passed destination pointer is never null, 
+  /// and the memory to which it points is uninitialized.
+  virtual void move_to(allocator const &, void *) noexcept = 0;
+  virtual void copy_to(allocator const &, void *) const noexcept(false) = 0;
+  virtual void destroy(allocator const &) noexcept = 0;
+};
+
+/**
+ * \class holder_null
+ * \brief A holder implementation that does not hold any data objects.
+*/
+class holder_null : public holder_base {
+public:
+  bool valid() const noexcept override { return false; }
+  std::type_info const &type() const noexcept override { return typeid(nullptr);}
+  std::size_t sizeof_type() const noexcept override { return 0; }
+  std::size_t sizeof_heap() const noexcept override { return 0; }
+  std::size_t count() const noexcept override { return 0; }
+  void *get() noexcept override { return nullptr; }
+  void const *get() const noexcept override { return nullptr; }
+  void move_to(allocator const &, void *) noexcept override {}
+  void copy_to(allocator const &, void *) const noexcept(false) override {}
+  void destroy(allocator const &) noexcept override {}
+};
+
+template <typename Value, bool/*is on stack*/>
+class holder;
+
+/**
+ * \class template <typename Value> holder<Value, true>
+ * \brief A holder implementation that holds a data object if type `Value` on stack memory.
+ * \tparam Value The storage type of the holder.
+ */
+template <typename Value>
+class holder<Value, true> : public holder_base {
+
+  ::LIBIMP::aligned<Value> value_storage_;
+
+public:
+  holder() = default; // uninitialized
+
+  template <typename... A>
+  holder(allocator const &, A &&...args) {
+    ::LIBIMP::construct<Value>(value_storage_.ptr(), std::forward<A>(args)...);
+  }
+
+  bool valid() const noexcept override {
+    return true;
+  }
+
+  std::type_info const &type() const noexcept override {
+    return typeid(Value);
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    return sizeof(Value);
+  }
+
+  std::size_t sizeof_heap() const noexcept override {
+    return 0;
+  }
+
+  std::size_t count() const noexcept override {
+    return 1;
+  }
+
+  void *get() noexcept override {
+    return value_storage_.ptr();
+  }
+
+  void const *get() const noexcept override {
+    return value_storage_.ptr();
+  }
+
+  void move_to(allocator const &alloc, void *p) noexcept override {
+    ::LIBIMP::construct<holder>(p, alloc, std::move(*static_cast<Value *>(get())));
+  }
+
+  void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    ::LIBIMP::construct<holder>(p, alloc, *static_cast<Value const *>(get()));
+  }
+
+  void destroy(allocator const &) noexcept override {
+    ::LIBIMP::destroy(static_cast<Value *>(get()));
+  }
+};
+
+/**
+ * \class template <typename Value> holder<Value, false>
+ * \brief A holder implementation that holds a data object if type `Value` on heap memory.
+ * \tparam Value The storage type of the holder.
+ */
+template <typename Value>
+class holder<Value, false> : public holder_base {
+
+  Value *value_ptr_;
+
+public:
+  holder() noexcept : value_ptr_(nullptr) {}
+
+  template <typename... A>
+  holder(allocator const &alloc, A &&...args) {
+    void *p = alloc.allocate(sizeof(Value), alignof(Value));
+    if (p == nullptr) return;
+    value_ptr_ = ::LIBIMP::construct<Value>(p, std::forward<A>(args)...);
+  }
+
+  bool valid() const noexcept override {
+    return value_ptr_ != nullptr;
+  }
+
+  std::type_info const &type() const noexcept override {
+    return typeid(Value);
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    return sizeof(Value);
+  }
+
+  std::size_t sizeof_heap() const noexcept override {
+    return sizeof(Value);
+  }
+
+  std::size_t count() const noexcept override {
+    return 1;
+  }
+
+  void *get() noexcept override {
+    return value_ptr_;
+  }
+
+  void const *get() const noexcept override {
+    return value_ptr_;
+  }
+
+  void move_to(allocator const &alloc, void *p) noexcept override {
+    if (value_ptr_ == nullptr) {
+      ::LIBIMP::construct<holder>(p);
+      return;
+    }
+    ::LIBIMP::construct<holder>(p, alloc, std::move(*value_ptr_));
+  }
+
+  void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    if (value_ptr_ == nullptr) {
+      ::LIBIMP::construct<holder>(p);
+      return;
+    }
+    ::LIBIMP::construct<holder>(p, alloc, *value_ptr_);
+  }
+
+  void destroy(allocator const &alloc) noexcept override {
+    alloc.deallocate(::LIBIMP::destroy(value_ptr_), sizeof(Value), alignof(Value));
+  }
+};
+
+namespace detail {
+
+/// \struct holder_type_base
+/// \brief Defines the holder type operation interface.
+struct holder_type_base {
+  virtual ~holder_type_base() noexcept = default;
+  virtual std::size_t size() const noexcept = 0;
+  virtual std::type_info const &type() const noexcept = 0;
+  virtual void move(void *s, void *d, std::size_t n) const noexcept = 0;
+  virtual void copy(void const *s, void *d, std::size_t n) const noexcept(false) = 0;
+  virtual void dest(void *p, std::size_t n) const noexcept = 0;
+};
+
+/// \struct template <typename Value> holder_type
+/// \brief Defines generalization operations for different data types.
+template <typename Value>
+struct holder_type : holder_type_base {
+  std::size_t           size() const noexcept override { return sizeof(Value); }
+  std::type_info const &type() const noexcept override { return typeid(Value); }
+
+  void move(void *s, void *d, std::size_t n) const noexcept override {
+    ::LIBIMP::uninitialized_move_n(static_cast<Value *>(s), n, static_cast<Value *>(d));
+  }
+  void copy(void const *s, void *d, std::size_t n) const noexcept(false) override {
+    std::uninitialized_copy_n(static_cast<Value const *>(s), n, static_cast<Value *>(d));
+  }
+  void dest(void *p, std::size_t n) const noexcept override {
+    ::LIBIMP::destroy_n(static_cast<Value *>(p), n);
+  }
+};
+
+template <typename Value>
+holder_type_base const *make_holder_type() noexcept {
+  static holder_type<Value> holder_type;
+  return &holder_type;
+}
+
+struct holder_info {
+  holder_type_base const *type;
+  std::size_t count;
+};
+
+struct holder_data : holder_info {
+  alignas(std::max_align_t) char ___data;
+};
+
+template <typename Value>
+std::size_t full_sizeof(std::size_t count) noexcept {
+  return ::LIBIMP::round_up(sizeof(detail::holder_info), alignof(std::max_align_t))
+        + (sizeof(Value) * count);
+}
+
+std::size_t full_sizeof(holder_info const *info) noexcept {
+  return ::LIBIMP::round_up(sizeof(detail::holder_info), alignof(std::max_align_t))
+        + (info->type->size() * info->count);
+}
+
+void *value_ptr(holder_info *info) noexcept {
+  if (info == nullptr) return nullptr;
+  return &static_cast<holder_data *>(info)->___data;
+}
+
+void const *value_ptr(holder_info const *info) noexcept {
+  if (info == nullptr) return nullptr;
+  return &static_cast<holder_data const *>(info)->___data;
+}
+
+/// \class holder_data_builder
+/// \brief The data pointer builder.
+class holder_data_builder {
+  allocator const &alloc_;
+  holder_data **pptr_;
+  std::size_t size_;
+
+public:
+  holder_data_builder(allocator const &alloc, holder_data *(&ptr), std::size_t sz) noexcept
+    : alloc_(alloc)
+    , pptr_ (&ptr)
+    , size_ (detail::full_sizeof<::LIBIMP::byte>(sz)) {
+    *pptr_ = static_cast<holder_data *>(alloc_.allocate(size_));
+  }
+
+  ~holder_data_builder() noexcept {
+    if (pptr_ == nullptr) return;
+    alloc_.deallocate(*pptr_, size_);
+    *pptr_ = nullptr;
+  }
+
+  explicit operator bool() const noexcept {
+    return (pptr_ != nullptr) && (*pptr_ != nullptr);
+  }
+
+  holder_data *operator->() const noexcept {
+    return *pptr_;
+  }
+
+  holder_data_builder &operator=(holder_data const &rhs) noexcept {
+    if (!*this) return *this;
+    **pptr_ = rhs;
+    return *this;
+  }
+
+  void release() noexcept {
+    pptr_ = nullptr;
+  }
+};
+
+} // namespace detail
+
+/**
+ * \class template <> holder<void, true>
+ * \brief A holder implementation of some data objects that stores type information on stack memory.
+ */
+template <>
+class holder<void, true> : public holder_base {
+
+  detail::holder_data info_;
+
+public:
+  template <typename Value>
+  static std::size_t full_sizeof(std::size_t count) noexcept {
+    return sizeof(holder) - sizeof(info_) + detail::full_sizeof<Value>(count);
+  }
+
+  holder() noexcept : info_{} {}
+
+  /// \brief Constructs a holder with type of `Value`.
+  /// alignof(Value) must be less than or equal to alignof(std::max_align_t).
+  template <typename Value, 
+            std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
+  holder(allocator const &, ::LIBIMP::types<Value>, std::size_t n) : holder() {
+    ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(get()), n);
+    info_.type  = detail::make_holder_type<Value>();
+    info_.count = n;
+  }
+
+  bool valid() const noexcept override {
+    return info_.type != nullptr;
+  }
+
+  std::type_info const &type() const noexcept override {
+    if (!valid()) return typeid(nullptr);
+    return info_.type->type();
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    if (!valid()) return 0;
+    return info_.type->size();
+  }
+
+  std::size_t sizeof_heap() const noexcept override {
+    return 0;
+  }
+
+  std::size_t count() const noexcept override {
+    return info_.count;
+  }
+
+  void *get() noexcept override {
+    return detail::value_ptr(&info_);
+  }
+
+  void const *get() const noexcept override {
+    return detail::value_ptr(&info_);
+  }
+
+  void move_to(allocator const &, void *p) noexcept override {
+    auto *des = ::LIBIMP::construct<holder>(p);
+    if (!valid()) return;
+    info_.type->move(this->get(), des->get(), this->count());
+    std::swap(des->info_, this->info_);
+  }
+
+  void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    auto *des = ::LIBIMP::construct<holder>(p);
+    if (!valid()) return;
+    info_.type->copy(this->get(), des->get(), this->count());
+    des->info_ = this->info_;
+  }
+
+  void destroy(allocator const &) noexcept override {
+    if (!valid()) return;
+    info_.type->dest(get(), count());
+  }
+};
+
+/**
+ * \class template <> holder<void, false>
+ * \brief A holder implementation of some data objects that stores type information on heap memory.
+ */
+template <>
+class holder<void, false> : public holder_base {
+
+  detail::holder_data *info_ptr_;
+
+public:
+  holder() noexcept
+    : info_ptr_(nullptr) {}
+
+  /// \brief Constructs a holder with type of `Value`.
+  /// alignof(Value) must be less than or equal to alignof(std::max_align_t).
+  template <typename Value, 
+            std::enable_if_t<alignof(Value) <= alignof(std::max_align_t), bool> = true>
+  holder(allocator const &alloc, ::LIBIMP::types<Value>, std::size_t n) : holder() {
+    LIBIMP_LOG_("holder<void, false>");
+    detail::holder_data_builder info_p{alloc, info_ptr_, sizeof(Value) * n};
+    if (!info_p) {
+      log.error("The destination information-pointer failed to be constructed."
+                " type size = ", sizeof(Value),
+                ", count = "   , n);
+      return;
+    }
+    ::LIBIMP::uninitialized_default_construct_n(static_cast<Value *>(get()), n);
+    info_p->type  = detail::make_holder_type<Value>();
+    info_p->count = n;
+    info_p.release();
+  }
+
+  bool valid() const noexcept override {
+    return (info_ptr_ != nullptr) && (info_ptr_->type != nullptr);
+  }
+
+  std::type_info const &type() const noexcept override {
+    if (!valid()) return typeid(nullptr);
+    return info_ptr_->type->type();
+  }
+
+  std::size_t sizeof_type() const noexcept override {
+    if (!valid()) return 0;
+    return info_ptr_->type->size();
+  }
+
+  std::size_t sizeof_heap() const noexcept override {
+    if (!valid()) return 0;
+    return detail::full_sizeof(info_ptr_);
+  }
+
+  std::size_t count() const noexcept override {
+    if (!valid()) return 0;
+    return info_ptr_->count;
+  }
+
+  void *get() noexcept override {
+    return detail::value_ptr(info_ptr_);
+  }
+
+  void const *get() const noexcept override {
+    return detail::value_ptr(info_ptr_);
+  }
+
+  void move_to(allocator const &, void *p) noexcept override {
+    auto *des = ::LIBIMP::construct<holder>(p);
+    if (!valid()) return;
+    std::swap(info_ptr_, des->info_ptr_);
+  }
+
+  void copy_to(allocator const &alloc, void *p) const noexcept(false) override {
+    LIBIMP_LOG_();
+    auto *des = ::LIBIMP::construct<holder>(p);
+    if (!valid()) return;
+    detail::holder_data_builder info_p{alloc, des->info_ptr_, this->sizeof_type() * this->count()};
+    if (!info_p) {
+      log.error("The destination information-pointer failed to be constructed."
+                " type size = ", this->sizeof_type(),
+                ", count = "   , this->count());
+      return;
+    }
+    info_ptr_->type->copy(this->get(), des->get(), this->count());
+    info_p = *info_ptr_;
+    info_p.release();
+  }
+
+  void destroy(allocator const &alloc) noexcept override {
+    if (!valid()) return;
+    info_ptr_->type->dest(get(), count());
+    alloc.deallocate(info_ptr_, sizeof_heap());
+  }
+};
+
+/**
+ * \class template <std::size_t N> small_storage
+ * \brief Unified SSO (Small Size Optimization).
+ * 
+ * \note `small_storage` does not release resources at destructor time, 
+ * the user needs to manually call the `release` function and 
+ * specify the appropriate allocator to complete the resource release.
+ * 
+ * \tparam N The size of the storage.
+ */
+template <std::size_t N>
+class small_storage {
+
+  static constexpr std::size_t storage_size = sizeof(holder<void *, false>) - sizeof(void *) + N;
+  static_assert(storage_size >= sizeof(holder<void *, false>), "N is not large enough to hold a pointer.");
+
+  alignas(std::max_align_t) std::array<::LIBIMP::byte, storage_size> storage_;
+
+  /// \brief Try to construct an object on the stack, and if there is not enough space, 
+  /// the memory allocator allocates heap memory to complete the construction.
+  template <typename T>
+  struct applicant {
+    template <typename... A>
+    T *operator()(small_storage *self, allocator const &alloc, A &&...args) const noexcept(false) {
+      self->get_holder()->destroy(alloc);
+      constexpr bool on_stack = (sizeof(holder<T, true>) <= storage_size);
+      ::LIBIMP::construct<holder<T, on_stack>>(self->get_holder(), alloc, std::forward<A>(args)...);
+      return self->as<T>();
+    }
+  };
+
+  /// \brief Try to construct an array of objects on the stack, and if there is not enough space, 
+  /// the memory allocator allocates heap memory to complete the construction.
+  template <typename T>
+  struct applicant<T[]> {
+    T *operator()(small_storage *self, allocator const &alloc, std::size_t n) const noexcept(false) {
+      self->get_holder()->destroy(alloc);
+      if (holder<void, true>::full_sizeof<T>(n) <= storage_size) {
+        ::LIBIMP::construct<holder<void, true> >(self->get_holder(), alloc, ::LIBIMP::types<T>{}, n);
+      } else {
+        ::LIBIMP::construct<holder<void, false>>(self->get_holder(), alloc, ::LIBIMP::types<T>{}, n);
+      }
+      return self->as<T>();
+    }
+  };
+
+public:
+  small_storage(small_storage const &) = delete;
+  small_storage &operator=(small_storage const &) = delete;
+
+  small_storage() noexcept {
+    ::LIBIMP::construct<holder_null>(get_holder());
+  }
+
+  holder_base *get_holder() noexcept {
+    return reinterpret_cast<holder_base *>(storage_.data());
+  }
+
+  holder_base const *get_holder() const noexcept {
+    return reinterpret_cast<holder_base const *>(storage_.data());
+  }
+
+  bool valid() const noexcept {
+    return get_holder()->valid();
+  }
+
+  std::type_info const &type() const noexcept {
+    return get_holder()->type();
+  }
+
+  std::size_t sizeof_type() const noexcept {
+    return get_holder()->sizeof_type();
+  }
+
+  std::size_t sizeof_heap() const noexcept {
+    return get_holder()->sizeof_heap();
+  }
+
+  std::size_t count() const noexcept {
+    return get_holder()->count();
+  }
+
+  template <typename Value>
+  Value *as() noexcept {
+    return static_cast<Value *>(get_holder()->get());
+  }
+
+  template <typename Value>
+  Value const *as() const noexcept {
+    return static_cast<Value const *>(get_holder()->get());
+  }
+
+  template <typename Value>
+  Value &as_ref() noexcept {
+    return *as<Value>();
+  }
+
+  template <typename Value>
+  Value const &as_ref() const noexcept {
+    return *as<Value>();
+  }
+
+  void move_to(allocator const &alloc, small_storage &des) noexcept {
+    get_holder()->move_to(alloc, des.get_holder());
+  }
+
+  void copy_to(allocator const &alloc, small_storage &des) const noexcept(false) {
+    get_holder()->copy_to(alloc, des.get_holder());
+  }
+
+  template <typename Value, typename... A>
+  auto acquire(allocator const &alloc, A &&...args) noexcept(false) {
+    return applicant<Value>{}(this, alloc, std::forward<A>(args)...);
+  }
+
+  void release(allocator const &alloc) noexcept {
+    if (!valid()) return;
+    get_holder()->destroy(alloc);
+    ::LIBIMP::construct<holder_null>(get_holder());
+  }
+};
+
+LIBPMR_NAMESPACE_END_
diff --git a/performance.xlsx b/performance.xlsx
deleted file mode 100644
index ac085e10..00000000
Binary files a/performance.xlsx and /dev/null differ
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index e1f439fe..f0c49828 100755
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,55 +1,4 @@
-project(ipc)
 
-aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc SRC_FILES)
-aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc/sync SRC_FILES)
-aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc/platform SRC_FILES)
-
-file(GLOB HEAD_FILES
-  ${LIBIPC_PROJECT_DIR}/include/libipc/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/*.inc
-  ${LIBIPC_PROJECT_DIR}/src/libipc/circ/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/memory/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/platform/*.h
-  ${LIBIPC_PROJECT_DIR}/src/libipc/utility/*.h)
-
-if (LIBIPC_BUILD_SHARED_LIBS)
-  add_library(${PROJECT_NAME} SHARED ${SRC_FILES} ${HEAD_FILES})
-  target_compile_definitions(${PROJECT_NAME}
-    INTERFACE
-      LIBIPC_LIBRARY_SHARED_USING__
-    PRIVATE
-      LIBIPC_LIBRARY_SHARED_BUILDING__)
-else()
-  add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
-endif()
-
-# set output directory
-set_target_properties(${PROJECT_NAME}
-	PROPERTIES
-	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-	LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
-	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
-
-# set version
-set_target_properties(${PROJECT_NAME}
-    PROPERTIES
-    VERSION 1.2.0
-    SOVERSION 3)
-
-target_include_directories(${PROJECT_NAME}
-  PUBLIC  ${LIBIPC_PROJECT_DIR}/include
-  PRIVATE ${LIBIPC_PROJECT_DIR}/src
-          $<$<BOOL:UNIX>:${LIBIPC_PROJECT_DIR}/src/libipc/platform/linux>)
-
-if(NOT MSVC)
-  target_link_libraries(${PROJECT_NAME} PUBLIC
-    $<$<NOT:$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>:pthread>
-    $<$<NOT:$<OR:$<STREQUAL:${CMAKE_SYSTEM_NAME},Windows>,$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>>:rt>)
-endif()
-
-install(
-  TARGETS ${PROJECT_NAME}
-  RUNTIME DESTINATION bin
-  LIBRARY DESTINATION lib
-  ARCHIVE DESTINATION lib)
+add_subdirectory(libimp)
+add_subdirectory(libpmr)
+add_subdirectory(libipc)
diff --git a/src/libimp/CMakeLists.txt b/src/libimp/CMakeLists.txt
new file mode 100644
index 00000000..60983a84
--- /dev/null
+++ b/src/libimp/CMakeLists.txt
@@ -0,0 +1,30 @@
+project(imp)
+
+if(NOT MSVC)
+  add_compile_options(
+    -Wno-attributes)
+endif()
+
+aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libimp SRC_FILES)
+
+file(GLOB HEAD_FILES
+  ${LIBIPC_PROJECT_DIR}/include/libimp/*.h)
+
+add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
+
+# set output directory
+set_target_properties(${PROJECT_NAME}
+	PROPERTIES
+	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+
+target_include_directories(${PROJECT_NAME}
+  PUBLIC  ${LIBIPC_PROJECT_DIR}/include
+  PRIVATE ${LIBIPC_PROJECT_DIR}/src)
+
+install(
+  TARGETS ${PROJECT_NAME}
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib)
diff --git a/src/libimp/codecvt.cpp b/src/libimp/codecvt.cpp
new file mode 100644
index 00000000..6de3e0ae
--- /dev/null
+++ b/src/libimp/codecvt.cpp
@@ -0,0 +1,369 @@
+#include "libimp/codecvt.h"
+
+#include <algorithm>
+#include <type_traits>
+#include <cstring>
+#include <cstdint>
+
+#include "libimp/log.h"
+#include "libimp/detect_plat.h"
+
+#if defined(LIBIMP_OS_WIN)
+#include "libimp/platform/win/codecvt.h"
+#endif
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief The transform between local-character-set(UTF-8/GBK/...) and UTF-16/32.
+ * 
+ * Modified from UnicodeConverter.
+ * Copyright (c) 2010. Jianhui Qin (http://blog.csdn.net/jhqin).
+ * 
+ * \remarks codecvt_utf8_utf16/std::wstring_convert is deprecated.
+ * \see https://codingtidbit.com/2020/02/09/c17-codecvt_utf8-is-deprecated/
+ *      https://stackoverflow.com/questions/42946335/deprecated-header-codecvt-replacement
+ *      https://en.cppreference.com/w/cpp/locale/codecvt/in
+*/
+namespace {
+
+/// \brief X-bit unicode transformation format
+enum class ufmt {
+  utf8,
+  utf16,
+  utf32,
+};
+
+template <typename T, ufmt, typename = void>
+struct utf_compatible : std::false_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf8, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 1)>> : std::true_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf16, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 2)>> : std::true_type {};
+
+template <typename T>
+struct utf_compatible<T, ufmt::utf32, 
+  std::enable_if_t<std::is_fundamental<T>::value && (sizeof(T) == 4)>> : std::true_type {};
+
+template <typename T, ufmt Fmt>
+constexpr bool utf_compatible_v = utf_compatible<T, Fmt>::value;
+
+/**
+ * \brief UTF-32 --> UTF-8
+ */
+template <typename T, typename U>
+auto cvt_char(T src, U* des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                      utf_compatible_v<U, ufmt::utf8>, std::size_t> {
+  if (src == 0) return 0;
+
+  constexpr std::uint8_t prefix[] = {
+    0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
+  };
+  constexpr std::uint32_t codeup[] = {
+    0x80,      // U+00000000 - U+0000007F
+    0x800,     // U+00000080 - U+000007FF
+    0x10000,   // U+00000800 - U+0000FFFF
+    0x200000,  // U+00010000 - U+001FFFFF
+    0x4000000, // U+00200000 - U+03FFFFFF
+    0x80000000 // U+04000000 - U+7FFFFFFF
+  };
+
+  std::size_t i, len = sizeof(codeup) / sizeof(std::uint32_t);
+  for(i = 0; i < len; ++i) {
+    if (static_cast<std::uint32_t>(src) < codeup[i]) break;
+  }
+  if (i == len) return 0; // the src is invalid
+
+  len = i + 1;
+  if (des != nullptr) {
+    if (dlen > i) for (; i > 0; --i) {
+      des[i] = static_cast<U>((src & 0x3F) | 0x80);
+      src >>= 6;
+    }
+    des[0] = static_cast<U>(src | prefix[len - 1]);
+  }
+  return len;
+}
+
+/**
+ * \brief UTF-8 --> UTF-32
+ */
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf8> &&
+                      utf_compatible_v<U, ufmt::utf32>, std::size_t> {
+  if ((src == nullptr) || (*src) == 0) return 0;
+  if (slen == 0) return 0;
+
+  std::uint8_t b = (std::uint8_t)*(src++);
+
+  if (b < 0x80) {
+    des = b;
+    return 1;
+  }
+
+  if (b < 0xC0 || b > 0xFD) return 0; // the src is invalid
+
+  std::size_t len;
+  if (b < 0xE0) {
+    des = b & 0x1F;
+    len = 2;
+  } else if (b < 0xF0) {
+    des = b & 0x0F;
+    len = 3;
+  } else if (b < 0xF8) {
+    des = b & 0x07;
+    len = 4;
+  } else if (b < 0xFC) {
+    des = b & 0x03;
+    len = 5;
+  } else {
+    des = b & 0x01;
+    len = 6;
+  }
+
+  if (slen < len) return 0;
+  std::size_t i = 1;
+  for(; i < len; ++i) {
+    b = *(src++);
+    if ((b < 0x80) || (b > 0xBF)) return 0; // the src is invalid
+    des = (des << 6) + (b & 0x3F);
+  }
+  return len;
+}
+
+/**
+ * \brief UTF-32 --> UTF-16
+ */
+template <typename T, typename U>
+auto cvt_char(T src, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                      utf_compatible_v<U, ufmt::utf16>, std::size_t> {
+  if (src == 0) return 0;
+
+  if (src <= 0xFFFF) {
+    if ((des != nullptr) && (dlen != 0)) {
+      (*des) = static_cast<U>(src);
+    }
+    return 1;
+  } else if (src <= 0xEFFFF) {
+    if ((des != nullptr) && (dlen > 1)) {
+      des[0] = static_cast<U>(0xD800 + (src >> 10) - 0x40);  // high
+      des[1] = static_cast<U>(0xDC00 + (src & 0x03FF));      // low
+    }
+    return 2;
+  }
+  return 0;
+}
+
+/**
+ * \brief UTF-16 --> UTF-32
+*/
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des)
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf16> &&
+                      utf_compatible_v<U, ufmt::utf32>, std::size_t> {
+  if ((src == nullptr) || (*src) == 0) return 0;
+  if (slen == 0) return 0;
+
+  std::uint16_t w1 = src[0];
+  if ((w1 >= 0xD800) && (w1 <= 0xDFFF)) {
+    if (w1 < 0xDC00) {
+      if (slen < 2) return 0;
+      std::uint16_t w2 = src[1];
+      if ((w2 >= 0xDC00) && (w2 <= 0xDFFF)) {
+        des = (w2 & 0x03FF) + (((w1 & 0x03FF) + 0x40) << 10);
+        return 2;
+      }
+    }
+    return 0; // the src is invalid
+  }
+  des = w1;
+  return 1;
+}
+
+/**
+ * \brief UTF-16 --> UTF-8
+*/
+template <typename T, typename U>
+auto cvt_char(T src, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf16> &&
+                      utf_compatible_v<U, ufmt::utf8>, std::size_t> {
+  // make utf-16 to utf-32
+  std::uint32_t tmp;
+  if (cvt_char(&src, 1, tmp) != 1) return 0;
+  // make utf-32 to utf-8
+  return cvt_char(tmp, des, dlen);
+}
+
+/**
+ * \brief UTF-8 --> UTF-16
+*/
+template <typename T, typename U>
+auto cvt_char(T const *src, std::size_t slen, U &des)
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf8> &&
+                      utf_compatible_v<U, ufmt::utf16>, std::size_t> {
+  // make utf-8 to utf-32
+  std::uint32_t tmp;
+  std::size_t len = cvt_char(src, slen, tmp);
+  if (len == 0) return 0;
+  // make utf-32 to utf-16
+  if (cvt_char(tmp, &des, 1) != 1) return 0;
+  return len;
+}
+
+/**
+ * \brief UTF-32 string --> UTF-8/16 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<T, ufmt::utf32> &&
+                     (utf_compatible_v<U, ufmt::utf16> || utf_compatible_v<U, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0, len = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0); ++src, ++i) {
+    len = cvt_char(*src, des, dlen);
+    if (len == 0) return 0;
+    if (des != nullptr) {
+      des += len;
+      if (dlen < len) {
+        dlen = 0;
+      } else {
+        dlen -= len;
+      }
+    }
+    num += len;
+  }
+  return num;
+}
+
+/**
+ * \brief UTF-8/16 string --> UTF-32 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<utf_compatible_v<U, ufmt::utf32> &&
+                     (utf_compatible_v<T, ufmt::utf16> || utf_compatible_v<T, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0);) {
+    std::uint32_t tmp;
+    std::size_t len = cvt_char(src, slen - i, tmp);
+    if (len == 0) return 0;
+    if ((des != nullptr) && (dlen > 0)) {
+      (*des) = tmp;
+      ++des;
+      dlen -= 1;
+    }
+    src += len;
+    i   += len;
+    num += 1;
+  }
+  return num;
+}
+
+/**
+ * \brief UTF-8/16 string --> UTF-16/8 string
+*/
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<(utf_compatible_v<T, ufmt::utf8>  && utf_compatible_v<U, ufmt::utf16>) ||
+                      (utf_compatible_v<T, ufmt::utf16> && utf_compatible_v<U, ufmt::utf8>), std::size_t> {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  std::size_t num = 0;
+  for (std::size_t i = 0; (i < slen) && ((*src) != 0);) {
+    // make utf-x to utf-32
+    std::uint32_t tmp;
+    std::size_t len = cvt_char(src, slen - i, tmp);
+    if (len == 0) return 0;
+    src += len;
+    i   += len;
+    // make utf-32 to utf-y
+    len = cvt_char(tmp, des, dlen);
+    if (len == 0) return 0;
+    if (des != nullptr) {
+      des += len;
+      if (dlen < len) {
+        dlen = 0;
+      } else {
+        dlen -= len;
+      }
+    }
+    num += len;
+  }
+  return num;
+}
+
+template <typename T, typename U>
+auto cvt_cstr_utf(T const *src, std::size_t slen, U *des, std::size_t dlen) noexcept
+  -> std::enable_if_t<(sizeof(T) == sizeof(U)), std::size_t> {
+  if ((des == nullptr) || (dlen == 0)) {
+    return slen;
+  }
+  std::size_t r = (std::min)(slen, dlen);
+  std::memcpy(des, src, r * sizeof(T));
+  return r;
+}
+
+} // namespace
+
+#define LIBIMP_DEF_CVT_CSTR_($CHAR_T, $CHAR_U) \
+  template <> \
+  std::size_t cvt_cstr($CHAR_T const *src, std::size_t slen, $CHAR_U *des, std::size_t dlen) noexcept { \
+    return cvt_cstr_utf(src, slen, des, dlen); \
+  }
+// #define LIBIMP_DEF_CVT_CSTR_($CHAR_T, $CHAR_U)
+
+LIBIMP_DEF_CVT_CSTR_(char    , char)
+LIBIMP_DEF_CVT_CSTR_(char    , char16_t)
+LIBIMP_DEF_CVT_CSTR_(char    , char32_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , wchar_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, char16_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, char)
+LIBIMP_DEF_CVT_CSTR_(char16_t, char32_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, char32_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, char)
+LIBIMP_DEF_CVT_CSTR_(char32_t, char16_t)
+#if !defined(LIBIMP_OS_WIN)
+LIBIMP_DEF_CVT_CSTR_(char    , wchar_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char16_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char32_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, wchar_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, wchar_t)
+#endif // !defined(LIBIMP_OS_WIN)
+
+#if defined(LIBIMP_CPP_20)
+LIBIMP_DEF_CVT_CSTR_(char8_t , char8_t)
+LIBIMP_DEF_CVT_CSTR_(char8_t , char)
+LIBIMP_DEF_CVT_CSTR_(char8_t , char16_t)
+LIBIMP_DEF_CVT_CSTR_(char8_t , char32_t)
+LIBIMP_DEF_CVT_CSTR_(char    , char8_t)
+LIBIMP_DEF_CVT_CSTR_(char16_t, char8_t)
+LIBIMP_DEF_CVT_CSTR_(char32_t, char8_t)
+#if !defined(LIBIMP_OS_WIN)
+LIBIMP_DEF_CVT_CSTR_(char8_t , wchar_t)
+LIBIMP_DEF_CVT_CSTR_(wchar_t , char8_t)
+#endif // !defined(LIBIMP_OS_WIN)
+#endif // defined(LIBIMP_CPP_20)
+
+#undef LIBIMP_DEF_CVT_CSTR_
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/fmt.cpp b/src/libimp/fmt.cpp
new file mode 100644
index 00000000..ac17e926
--- /dev/null
+++ b/src/libimp/fmt.cpp
@@ -0,0 +1,325 @@
+#include "libimp/fmt.h"
+
+#include <cstdio>     // std::snprintf
+#include <iomanip>    // std::put_time
+#include <sstream>    // std::ostringstream
+#include <array>
+#include <cstring>    // std::memcpy
+#include <algorithm>  // std::min
+#include <initializer_list>
+#include <cstdint>
+
+#include "libimp/codecvt.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief Format conversions helpers.
+ * \see http://personal.ee.surrey.ac.uk/Personal/R.Bowden/C/printf.html
+ *      https://en.cppreference.com/w/cpp/io/c/fprintf
+ */
+namespace {
+
+struct sfmt_policy {
+  static constexpr std::size_t aligned_size = 32U;
+};
+
+template <typename Policy = sfmt_policy>
+span<char> local_fmt_sbuf() noexcept {
+  thread_local std::array<char, Policy::aligned_size> sbuf;
+  return sbuf;
+}
+
+span<char const> normalize(span<char const> const &a) {
+  if (a.empty()) return {};
+  return a.first(a.size() - (a.back() == '\0' ? 1 : 0));
+}
+
+span<char> smem_cpy(span<char> const &sbuf, span<char const> a) noexcept {
+  if (sbuf.empty()) return {};
+  a = normalize(a);
+  auto sz = (std::min)(sbuf.size() - 1, a.size());
+  if (sz != 0) std::memcpy(sbuf.data(), a.data(), sz);
+  return sbuf.first(sz);
+}
+
+span<char> sbuf_cpy(span<char> sbuf, span<char const> const &a) noexcept {
+  sbuf = smem_cpy(sbuf, a);
+  *sbuf.end() = '\0';
+  return sbuf;
+}
+
+span<char> sbuf_cat(span<char> const &sbuf, std::initializer_list<span<char const>> args) noexcept {
+  std::size_t remain = sbuf.size();
+  for (auto s : args) {
+    remain -= smem_cpy(sbuf.last(remain), s).size();
+  }
+  auto sz = sbuf.size() - remain;
+  sbuf[sz] = '\0';
+  return sbuf.first(sz);
+}
+
+char const *as_cstr(span<char const> const &a) {
+  if (a.empty()) return "";
+  if (a.back() == '\0') return a.data();
+  return sbuf_cpy(local_fmt_sbuf(), a).data();
+}
+
+span<char> fmt_of(span<char const> const &fstr, span<char const> const &s) {
+  return sbuf_cat(local_fmt_sbuf(), {"%", fstr, s});
+}
+
+span<char> fmt_of_unsigned(span<char const> fstr, span<char const> const &l) {
+  if (fstr.empty()) {
+    return fmt_of(l, "u");
+  }
+  fstr = normalize(fstr);
+  switch (fstr.back()) {
+    case 'o':
+    case 'x':
+    case 'X':
+    case 'u': return sbuf_cat(local_fmt_sbuf(), {"%", fstr.first(fstr.size() - 1), l, fstr.last(1)});
+    default : return sbuf_cat(local_fmt_sbuf(), {"%", fstr, l, "u"});
+  }
+}
+
+span<char> fmt_of_signed(span<char const> fstr, span<char const> const &l) {
+  if (fstr.empty()) {
+    return fmt_of(l, "d");
+  }
+  fstr = normalize(fstr);
+  switch (fstr.back()) {
+    case 'o':
+    case 'x':
+    case 'X':
+    case 'u': return fmt_of_unsigned(fstr, l);
+    default : return sbuf_cat(local_fmt_sbuf(), {"%", fstr, l, "d"});
+  }
+}
+
+span<char> fmt_of_float(span<char const> fstr, span<char const> const &l) {
+  if (fstr.empty()) {
+    return fmt_of(l, "f");
+  }
+  fstr = normalize(fstr);
+  switch (fstr.back()) {
+    case 'e':
+    case 'E':
+    case 'g':
+    case 'G': return sbuf_cat(local_fmt_sbuf(), {"%", fstr.first(fstr.size() - 1), l, fstr.last(1)});
+    default : return sbuf_cat(local_fmt_sbuf(), {"%", fstr, l, "f"});
+  }
+}
+
+template <typename A /*a fundamental or pointer type*/>
+int sprintf(fmt_context &ctx, span<char const> const &sfmt, A a) {
+  for (std::int32_t sz = -1;;) {
+    auto sbuf = ctx.buffer(sz + 1);
+    if (sbuf.size() < std::size_t(sz + 1)) {
+      return -1;
+    }
+    sz = std::snprintf(sbuf.data(), sbuf.size(), sfmt.data(), a);
+    if (sz <= 0) {
+      return sz;
+    }
+    if (std::size_t(sz) < sbuf.size()) {
+      ctx.expend(sz);
+      return sz;
+    }
+  }
+}
+
+template <typename F /*a function pointer*/, 
+          typename A /*a fundamental or pointer type*/>
+bool sprintf(fmt_context &ctx, F fop, span<char const> const &fstr, span<char const> const &s, A a) noexcept {
+  LIBIMP_TRY {
+    return ::LIBIMP::sprintf(ctx, fop(fstr, s), a) >= 0;
+  } LIBIMP_CATCH(...) {
+    return false;
+  }
+}
+
+} // namespace
+
+/// \brief The context of fmt.
+
+fmt_context::fmt_context(std::string &j) noexcept
+  : joined_(j)
+  , offset_(0) {}
+
+std::size_t fmt_context::capacity() noexcept {
+  return (offset_ < sbuf_.size()) ? sbuf_.size() : joined_.size();
+}
+
+void fmt_context::reset() noexcept {
+  offset_ = 0;
+}
+
+bool fmt_context::finish() noexcept {
+  LIBIMP_TRY {
+    if (offset_ < sbuf_.size()) {
+      joined_.assign(sbuf_.data(), offset_);
+    } else {
+      joined_.resize(offset_);
+    }
+    return true;
+  } LIBIMP_CATCH(...) {
+    return false;
+  }
+}
+
+span<char> fmt_context::buffer(std::size_t sz) noexcept {
+  auto roundup = [](std::size_t sz) noexcept {
+    constexpr std::size_t fmt_context_aligned_size = 512U;
+    return (sz & ~(fmt_context_aligned_size - 1)) + fmt_context_aligned_size;
+  };
+  auto sbuf = make_span(sbuf_);
+  LIBIMP_TRY {
+    if (offset_ < sbuf.size()) {
+      if ((offset_ + sz) < sbuf.size()) {
+        return sbuf.subspan(offset_);
+      } else {
+        /// \remark switch the cache to std::string
+        joined_.assign(sbuf.data(), offset_);
+        joined_.resize(roundup(offset_ + sz));
+      }
+    } else if ((offset_ + sz) >= joined_.size()) {
+      joined_.resize(roundup(offset_ + sz));
+    }
+    return {&joined_[offset_], joined_.size() - offset_};
+  } LIBIMP_CATCH(...) {
+    return {};
+  }
+}
+
+void fmt_context::expend(std::size_t sz) noexcept {
+  offset_ += sz;
+}
+
+bool fmt_context::append(span<char const> const &str) noexcept {
+  auto sz = str.size();
+  if (str.back() == '\0') --sz;
+  auto sbuf = buffer(sz);
+  if (sbuf.size() < sz) {
+    return false;
+  }
+  std::memcpy(sbuf.data(), str.data(), sz);
+  offset_ += sz;
+  return true;
+}
+
+/// \brief To string conversion.
+
+bool to_string(fmt_context &ctx, char const *a) noexcept {
+  return to_string(ctx, a, {});
+}
+
+bool to_string(fmt_context &ctx, std::string const &a) noexcept {
+  return ctx.append(a);
+}
+
+bool to_string(fmt_context &ctx, char const *a, span<char const> fstr) noexcept {
+  if (a == nullptr) return false;
+  return ::LIBIMP::sprintf(ctx, fmt_of, fstr, "s", a);
+}
+
+bool to_string(fmt_context &ctx, char a) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of, {}, "c", a);
+}
+
+bool to_string(fmt_context &ctx, wchar_t a) noexcept {
+  LIBIMP_TRY {
+    std::string des;
+    cvt_sstr(std::wstring{a}, des);
+    return ctx.append(des);
+  } LIBIMP_CATCH(...) {
+    return false;
+  }
+}
+
+bool to_string(fmt_context &ctx, char16_t a) noexcept {
+  LIBIMP_TRY {
+    std::string des;
+    cvt_sstr(std::u16string{a}, des);
+    return ctx.append(des);
+  } LIBIMP_CATCH(...) {
+    return false;
+  }
+}
+
+bool to_string(fmt_context &ctx, char32_t a) noexcept {
+  LIBIMP_TRY {
+    std::string des;
+    cvt_sstr(std::u32string{a}, des);
+    return ctx.append(des);
+  } LIBIMP_CATCH(...) {
+    return false;
+  }
+}
+
+bool to_string(fmt_context &ctx, signed short a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_signed, fstr, "h", a);
+}
+
+bool to_string(fmt_context &ctx, unsigned short a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_unsigned, fstr, "h", a);
+}
+
+bool to_string(fmt_context &ctx, signed int a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_signed, fstr, "", a);
+}
+
+bool to_string(fmt_context &ctx, unsigned int a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_unsigned, fstr, "", a);
+}
+
+bool to_string(fmt_context &ctx, signed long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_signed, fstr, "l", a);
+}
+
+bool to_string(fmt_context &ctx, unsigned long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_unsigned, fstr, "l", a);
+}
+
+bool to_string(fmt_context &ctx, signed long long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_signed, fstr, "ll", a);
+}
+
+bool to_string(fmt_context &ctx, unsigned long long a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_unsigned, fstr, "ll", a);
+}
+
+bool to_string(fmt_context &ctx, double a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_float, fstr, "", a);
+}
+
+bool to_string(fmt_context &ctx, long double a, span<char const> fstr) noexcept {
+  return ::LIBIMP::sprintf(ctx, fmt_of_float, fstr, "L", a);
+}
+
+bool to_string(fmt_context &ctx, std::nullptr_t) noexcept {
+  return ctx.append("null");
+}
+
+template <>
+bool to_string<void, void>(fmt_context &ctx, void const volatile *a) noexcept {
+  if (a == nullptr) {
+    return to_string(ctx, nullptr);
+  }
+  return ::LIBIMP::sprintf(ctx, fmt_of, "", "p", a);
+}
+
+bool to_string(fmt_context &ctx, std::tm const &a, span<char const> fstr) noexcept {
+  if (fstr.empty()) {
+    fstr = "%Y-%m-%d %H:%M:%S";
+  }
+  LIBIMP_TRY {
+    std::ostringstream ss;
+    ss << std::put_time(&a, as_cstr(fstr));
+    return ctx.append(ss.str());
+  } LIBIMP_CATCH(...) {
+    return {};
+  }
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/nameof.cpp b/src/libimp/nameof.cpp
new file mode 100644
index 00000000..ef6a4528
--- /dev/null
+++ b/src/libimp/nameof.cpp
@@ -0,0 +1,7 @@
+
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_CC_GNUC)
+# include "libimp/platform/gnuc/demangle.h"
+#else
+# include "libimp/platform/win/demangle.h"
+#endif
diff --git a/src/libimp/platform/gnuc/demangle.h b/src/libimp/platform/gnuc/demangle.h
new file mode 100644
index 00000000..15d1c306
--- /dev/null
+++ b/src/libimp/platform/gnuc/demangle.h
@@ -0,0 +1,41 @@
+/**
+ * \file libimp/platform/gnuc/demangle.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <cxxabi.h> // abi::__cxa_demangle
+
+#include <cstdlib>  // std::malloc
+
+#include "libimp/def.h"
+#include "libimp/nameof.h"
+#include "libimp/log.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \brief The conventional way to obtain demangled symbol name.
+ * \see https://www.boost.org/doc/libs/1_80_0/libs/core/doc/html/core/demangle.html
+ * 
+ * \param name the mangled name
+ * \return std::string a human-readable demangled type name
+ */
+std::string demangle(span<char const> name) noexcept {
+  LIBIMP_LOG_();
+  /// \see https://gcc.gnu.org/onlinedocs/libstdc++/libstdc++-html-USERS-4.3/a01696.html
+  std::size_t sz = name.size() + 1;
+  char *buffer = static_cast<char *>(std::malloc(sz));
+  int status = 0;
+  char *realname = abi::__cxa_demangle(name.data(), buffer, &sz, &status);
+  if (realname == nullptr) {
+    log.error("failed: abi::__cxa_demangle(sz = ", sz, "), status = ", status);
+    std::free(buffer);
+    return {};
+  }
+  std::string demangled(realname, sz);
+  std::free(realname);
+  return demangled;
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/posix/system.h b/src/libimp/platform/posix/system.h
new file mode 100644
index 00000000..887f28ed
--- /dev/null
+++ b/src/libimp/platform/posix/system.h
@@ -0,0 +1,49 @@
+/**
+ * \file libimp/platform/posix/system.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "libimp/system.h"
+#include "libimp/log.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace sys {
+
+/**
+ * \brief Get the system error number.
+ * \see https://en.cppreference.com/w/cpp/error/generic_category
+ *      https://man7.org/linux/man-pages/man3/errno.3.html
+*/
+std::error_code error() noexcept {
+  return std::error_code(errno, std::generic_category());
+}
+
+/**
+ * \brief Gets configuration information at run time
+ * https://man7.org/linux/man-pages/man2/getpagesize.2.html
+ * https://man7.org/linux/man-pages/man3/sysconf.3.html
+ */
+result<std::int64_t> conf(info r) noexcept {
+  LIBIMP_LOG_();
+  switch (r) {
+  case info::page_size: {
+    auto val = ::sysconf(_SC_PAGESIZE);
+    if (val >= 0) return static_cast<std::int64_t>(val);
+    break;
+  }
+  default:
+    log.error("invalid info = ", underlyof(r));
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  auto err = sys::error();
+  log.error("info = ", underlyof(r), ", error = ", err);
+  return err;
+}
+
+} // namespace sys
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/win/codecvt.h b/src/libimp/platform/win/codecvt.h
new file mode 100644
index 00000000..e48db93f
--- /dev/null
+++ b/src/libimp/platform/win/codecvt.h
@@ -0,0 +1,97 @@
+/**
+ * \file libimp/platform/win/codecvt.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <Windows.h>
+
+#include "libimp/codecvt.h"
+#include "libimp/log.h"
+#include "libimp/system.h"
+#include "libimp/detect_plat.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+/**
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar
+ *      https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-widechartomultibyte
+ * 
+ *      CP_ACP       : The system default Windows ANSI code page.
+ *      CP_MACCP     : The current system Macintosh code page.
+ *      CP_OEMCP     : The current system OEM code page.
+ *      CP_SYMBOL    : Symbol code page (42).
+ *      CP_THREAD_ACP: The Windows ANSI code page for the current thread.
+ *      CP_UTF7      : UTF-7. Use this value only when forced by a 7-bit transport mechanism. Use of UTF-8 is preferred.
+ *      CP_UTF8      : UTF-8.
+*/
+
+template <>
+std::size_t cvt_cstr(char const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  int cch_wc = (des == nullptr) ? 0 : (int)dlen;
+  int size_needed = ::MultiByteToWideChar(CP_ACP, 0, src, (int)slen, des, cch_wc);
+  if (size_needed <= 0) {
+    log.error("failed: MultiByteToWideChar(CP_ACP). error = ", sys::error());
+  }
+  return size_needed;
+}
+
+template <>
+std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  int cb_mb = (des == nullptr) ? 0 : (int)dlen;
+  int size_needed = ::WideCharToMultiByte(CP_ACP, 0, src, (int)slen, des, cb_mb, NULL, NULL);
+  if (size_needed <= 0) {
+    log.error("failed: WideCharToMultiByte(CP_ACP). error = ", sys::error());
+  }
+  return size_needed;
+}
+
+/**
+ * \brief Used for char8_t (since C++20) to wchar_t conversion.
+ * 
+ * There is no ut to guarantee correctness (I'm a little lazy here), 
+ * so if there are any bugs, please contact me in time.
+ */
+#if defined(LIBIMP_CPP_20)
+template <>
+std::size_t cvt_cstr(char8_t const *src, std::size_t slen, wchar_t *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  int cch_wc = (des == nullptr) ? 0 : (int)dlen;
+  int size_needed = ::MultiByteToWideChar(CP_UTF8, 0, (char *)src, (int)slen, des, cch_wc);
+  if (size_needed <= 0) {
+    log.error("failed: MultiByteToWideChar(CP_UTF8). error = ", sys::error());
+  }
+  return size_needed;
+}
+
+template <>
+std::size_t cvt_cstr(wchar_t const *src, std::size_t slen, char8_t *des, std::size_t dlen) noexcept {
+  LIBIMP_LOG_();
+  if ((src == nullptr) || ((*src) == 0) || (slen == 0)) {
+    log.error("source string is empty.");
+    return 0;
+  }
+  int cb_mb = (des == nullptr) ? 0 : (int)dlen;
+  int size_needed = ::WideCharToMultiByte(CP_UTF8, 0, src, (int)slen, (char *)des, cb_mb, NULL, NULL);
+  if (size_needed <= 0) {
+    log.error("failed: WideCharToMultiByte(CP_UTF8). error = ", sys::error());
+  }
+  return size_needed;
+}
+#endif // defined(LIBIMP_CPP_20)
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/win/demangle.h b/src/libimp/platform/win/demangle.h
new file mode 100644
index 00000000..d2376f28
--- /dev/null
+++ b/src/libimp/platform/win/demangle.h
@@ -0,0 +1,16 @@
+/**
+ * \file libimp/platform/win/demangle.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include "libimp/def.h"
+#include "libimp/nameof.h"
+
+LIBIMP_NAMESPACE_BEG_
+
+std::string demangle(span<char const> name) noexcept {
+  return std::string(name.data(), name.size());
+}
+
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/platform/win/system.h b/src/libimp/platform/win/system.h
new file mode 100644
index 00000000..f0a63996
--- /dev/null
+++ b/src/libimp/platform/win/system.h
@@ -0,0 +1,88 @@
+/**
+ * \file libimp/platform/win/system.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <exception>
+#include <type_traits>
+
+#include <Windows.h>
+#include <tchar.h>
+
+#include "libimp/system.h"
+#include "libimp/log.h"
+#include "libimp/codecvt.h"
+#include "libimp/underlyof.h"
+#include "libimp/detect_plat.h"
+#include "libimp/scope_exit.h"
+
+LIBIMP_NAMESPACE_BEG_
+namespace sys {
+
+/**
+ * \brief Gets a text description of the system error
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-formatmessage
+ */
+std::string error_string(DWORD code) noexcept {
+  LIBIMP_LOG_();
+  LIBIMP_TRY {
+    LPTSTR lpErrText = NULL;
+    if (::FormatMessage(
+          FORMAT_MESSAGE_ALLOCATE_BUFFER | 
+          FORMAT_MESSAGE_FROM_SYSTEM | 
+          FORMAT_MESSAGE_IGNORE_INSERTS,
+          NULL,
+          code,
+          MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+          (LPTSTR)&lpErrText,
+          0, NULL) == 0) {
+      log.error("failed: FormatMessage(dwMessageId = ", code, "). error = ", ::GetLastError());
+      return {};
+    }
+    LIBIMP_SCOPE_EXIT(finally) = [lpErrText] { ::LocalFree(lpErrText); };
+    std::size_t msg_len = ::_tcslen(lpErrText);
+    std::size_t len = cvt_cstr(lpErrText, msg_len, (char *)nullptr, 0);
+    if (len == 0) {
+      return {};
+    }
+    std::string ret(len, '\0');
+    cvt_cstr(lpErrText, msg_len, &ret[0], ret.size());
+    return ret;
+  } LIBIMP_CATCH(...) {
+    log.error("failed: FormatMessage(dwMessageId = ", code, ").",
+              "\n\texception: ", ::LIBIMP::log::exception_string(std::current_exception()));
+  }
+  return {};
+}
+
+/**
+ * \brief Get the system error number.
+ * \see https://en.cppreference.com/w/cpp/error/system_category
+ *      https://docs.microsoft.com/en-us/windows/win32/api/errhandlingapi/nf-errhandlingapi-getlasterror
+*/
+std::error_code error() noexcept {
+  return std::error_code(::GetLastError(), std::system_category());
+}
+
+/**
+ * \brief Retrieves information about the current system.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
+ *      https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getnativesysteminfo
+ */
+result<std::int64_t> conf(info r) noexcept {
+  LIBIMP_LOG_();
+  switch (r) {
+  case info::page_size: {
+    ::SYSTEM_INFO info {};
+    ::GetNativeSystemInfo(&info);
+    return (std::int64_t)info.dwPageSize;
+  }
+  default:
+    log.error("invalid info = ", underlyof(r));
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+}
+
+} // namespace sys
+LIBIMP_NAMESPACE_END_
diff --git a/src/libimp/system.cpp b/src/libimp/system.cpp
new file mode 100644
index 00000000..c9441648
--- /dev/null
+++ b/src/libimp/system.cpp
@@ -0,0 +1,9 @@
+
+#include "libimp/system.h"
+#include "libimp/fmt.h"
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+# include "libimp/platform/win/system.h"
+#else
+# include "libimp/platform/posix/system.h"
+#endif
diff --git a/src/libimp/xmake.lua b/src/libimp/xmake.lua
new file mode 100644
index 00000000..cb464bd9
--- /dev/null
+++ b/src/libimp/xmake.lua
@@ -0,0 +1,6 @@
+target("imp")
+  set_kind("static")
+  on_config(config_target_compilation)
+  add_includedirs("$(projectdir)/include", {public = true})
+  add_includedirs("$(projectdir)/src")
+  add_files("$(projectdir)/src/libimp/**.cpp")
diff --git a/src/libipc/CMakeLists.txt b/src/libipc/CMakeLists.txt
new file mode 100644
index 00000000..5c67bb71
--- /dev/null
+++ b/src/libipc/CMakeLists.txt
@@ -0,0 +1,66 @@
+project(ipc)
+
+if(NOT MSVC)
+  add_compile_options(
+    -Wno-attributes)
+endif()
+
+# if(CMAKE_SYSTEM_NAME MATCHES "Windows")
+#   FetchContent_Declare(phnt
+#     GIT_REPOSITORY https://github.com/winsiderss/phnt.git
+#     GIT_TAG        master
+#   )
+#   FetchContent_MakeAvailable(phnt)
+# endif()
+
+aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libipc SRC_FILES)
+
+file(GLOB HEAD_FILES
+  ${LIBIPC_PROJECT_DIR}/include/libipc/*.h)
+
+if (LIBIPC_BUILD_SHARED_LIBS)
+  add_library(${PROJECT_NAME} SHARED ${SRC_FILES} ${HEAD_FILES})
+  target_compile_definitions(${PROJECT_NAME}
+    INTERFACE
+      LIBIMP_LIBRARY_SHARED_USING__
+    PRIVATE
+      LIBIMP_LIBRARY_SHARED_BUILDING__)
+else()
+  add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
+endif()
+
+# set output directory
+set_target_properties(${PROJECT_NAME}
+	PROPERTIES
+	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+
+# set version
+set_target_properties(${PROJECT_NAME}
+  PROPERTIES
+  VERSION 2.0.0
+  SOVERSION 4)
+
+target_include_directories(${PROJECT_NAME}
+  PUBLIC  ${LIBIPC_PROJECT_DIR}/include
+  PRIVATE ${LIBIPC_PROJECT_DIR}/src)
+
+if(NOT MSVC)
+  target_link_libraries(${PROJECT_NAME} PUBLIC
+    $<$<NOT:$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>:pthread>
+    $<$<NOT:$<OR:$<STREQUAL:${CMAKE_SYSTEM_NAME},Windows>,$<STREQUAL:${CMAKE_SYSTEM_NAME},QNX>>>:rt>
+    "-Wl,--whole-archive" imp pmr "-Wl,--no-whole-archive")
+else()
+  target_link_libraries(${PROJECT_NAME} PUBLIC imp pmr)
+endif()
+
+# if(CMAKE_SYSTEM_NAME MATCHES "Windows")
+#   target_link_libraries(${PROJECT_NAME} PUBLIC phnt)
+# endif()
+
+install(
+  TARGETS ${PROJECT_NAME}
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib)
diff --git a/src/libipc/buffer.cpp b/src/libipc/buffer.cpp
deleted file mode 100755
index 084b8153..00000000
--- a/src/libipc/buffer.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-#include "libipc/buffer.h"
-#include "libipc/utility/pimpl.h"
-
-#include <cstring>
-
-namespace ipc {
-
-bool operator==(buffer const & b1, buffer const & b2) {
-    return (b1.size() == b2.size()) && (std::memcmp(b1.data(), b2.data(), b1.size()) == 0);
-}
-
-bool operator!=(buffer const & b1, buffer const & b2) {
-    return !(b1 == b2);
-}
-
-class buffer::buffer_ : public pimpl<buffer_> {
-public:
-    void*       p_;
-    std::size_t s_;
-    void*       a_;
-    buffer::destructor_t d_;
-
-    buffer_(void* p, std::size_t s, buffer::destructor_t d, void* a)
-        : p_(p), s_(s), a_(a), d_(d) {
-    }
-
-    ~buffer_() {
-        if (d_ == nullptr) return;
-        d_((a_ == nullptr) ? p_ : a_, s_);
-    }
-};
-
-buffer::buffer()
-    : buffer(nullptr, 0, nullptr, nullptr) {
-}
-
-buffer::buffer(void* p, std::size_t s, destructor_t d)
-    : p_(p_->make(p, s, d, nullptr)) {
-}
-
-buffer::buffer(void* p, std::size_t s, destructor_t d, void* additional)
-    : p_(p_->make(p, s, d, additional)) {
-}
-
-buffer::buffer(void* p, std::size_t s)
-    : buffer(p, s, nullptr) {
-}
-
-buffer::buffer(char const & c)
-    : buffer(const_cast<char*>(&c), 1) {
-}
-
-buffer::buffer(buffer&& rhs)
-    : buffer() {
-    swap(rhs);
-}
-
-buffer::~buffer() {
-    p_->clear();
-}
-
-void buffer::swap(buffer& rhs) {
-    std::swap(p_, rhs.p_);
-}
-
-buffer& buffer::operator=(buffer rhs) {
-    swap(rhs);
-    return *this;
-}
-
-bool buffer::empty() const noexcept {
-    return (impl(p_)->p_ == nullptr) || (impl(p_)->s_ == 0);
-}
-
-void* buffer::data() noexcept {
-    return impl(p_)->p_;
-}
-
-void const * buffer::data() const noexcept {
-    return impl(p_)->p_;
-}
-
-std::size_t buffer::size() const noexcept {
-    return impl(p_)->s_;
-}
-
-} // namespace ipc
diff --git a/src/libipc/circ/elem_array.h b/src/libipc/circ/elem_array.h
deleted file mode 100755
index 0b21f486..00000000
--- a/src/libipc/circ/elem_array.h
+++ /dev/null
@@ -1,141 +0,0 @@
-#pragma once
-
-#include <atomic>   // std::atomic<?>
-#include <limits>
-#include <utility>
-#include <type_traits>
-
-#include "libipc/def.h"
-#include "libipc/rw_lock.h"
-
-#include "libipc/circ/elem_def.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace circ {
-
-template <typename Policy,
-          std::size_t DataSize,
-          std::size_t AlignSize = (ipc::detail::min)(DataSize, alignof(std::max_align_t))>
-class elem_array : public ipc::circ::conn_head<Policy> {
-public:
-    using base_t   = ipc::circ::conn_head<Policy>;
-    using policy_t = Policy;
-    using cursor_t = decltype(std::declval<policy_t>().cursor());
-    using elem_t   = typename policy_t::template elem_t<DataSize, AlignSize>;
-
-    enum : std::size_t {
-        head_size  = sizeof(base_t) + sizeof(policy_t),
-        data_size  = DataSize,
-        elem_max   = (std::numeric_limits<uint_t<8>>::max)() + 1, // default is 255 + 1
-        elem_size  = sizeof(elem_t),
-        block_size = elem_size * elem_max
-    };
-
-private:
-    policy_t head_;
-    elem_t   block_[elem_max] {};
-
-    /**
-     * @remarks 'warning C4348: redefinition of default parameter' with MSVC.
-     * @see
-     *  - https://stackoverflow.com/questions/12656239/redefinition-of-default-template-parameter
-     *  - https://developercommunity.visualstudio.com/content/problem/425978/incorrect-c4348-warning-in-nested-template-declara.html
-    */
-    template <typename P, bool/* = relat_trait<P>::is_multi_producer*/>
-    struct sender_checker;
-
-    template <typename P>
-    struct sender_checker<P, true> {
-        constexpr static bool connect() noexcept {
-            // always return true
-            return true;
-        }
-        constexpr static void disconnect() noexcept {}
-    };
-
-    template <typename P>
-    struct sender_checker<P, false> {
-        bool connect() noexcept {
-            return !flag_.test_and_set(std::memory_order_acq_rel);
-        }
-        void disconnect() noexcept {
-            flag_.clear();
-        }
-
-    private:
-        // in shm, it should be 0 whether it's initialized or not.
-        std::atomic_flag flag_ = ATOMIC_FLAG_INIT;
-    };
-
-    template <typename P, bool/* = relat_trait<P>::is_multi_consumer*/>
-    struct receiver_checker;
-
-    template <typename P>
-    struct receiver_checker<P, true> {
-        constexpr static cc_t connect(base_t &conn) noexcept {
-            return conn.connect();
-        }
-        constexpr static cc_t disconnect(base_t &conn, cc_t cc_id) noexcept {
-            return conn.disconnect(cc_id);
-        }
-    };
-
-    template <typename P>
-    struct receiver_checker<P, false> : protected sender_checker<P, false> {
-        cc_t connect(base_t &conn) noexcept {
-            return sender_checker<P, false>::connect() ? conn.connect() : 0;
-        }
-        cc_t disconnect(base_t &conn, cc_t cc_id) noexcept {
-            sender_checker<P, false>::disconnect();
-            return conn.disconnect(cc_id);
-        }
-    };
-
-    sender_checker  <policy_t, relat_trait<policy_t>::is_multi_producer> s_ckr_;
-    receiver_checker<policy_t, relat_trait<policy_t>::is_multi_consumer> r_ckr_;
-
-    // make these be private
-    using base_t::connect;
-    using base_t::disconnect;
-
-public:
-    bool connect_sender() noexcept {
-        return s_ckr_.connect();
-    }
-
-    void disconnect_sender() noexcept {
-        return s_ckr_.disconnect();
-    }
-
-    cc_t connect_receiver() noexcept {
-        return r_ckr_.connect(*this);
-    }
-
-    cc_t disconnect_receiver(cc_t cc_id) noexcept {
-        return r_ckr_.disconnect(*this, cc_id);
-    }
-
-    cursor_t cursor() const noexcept {
-        return head_.cursor();
-    }
-
-    template <typename Q, typename F>
-    bool push(Q* que, F&& f) {
-        return head_.push(que, std::forward<F>(f), block_);
-    }
-
-    template <typename Q, typename F>
-    bool force_push(Q* que, F&& f) {
-        return head_.force_push(que, std::forward<F>(f), block_);
-    }
-
-    template <typename Q, typename F, typename R>
-    bool pop(Q* que, cursor_t* cur, F&& f, R&& out) {
-        if (cur == nullptr) return false;
-        return head_.pop(que, *cur, std::forward<F>(f), std::forward<R>(out), block_);
-    }
-};
-
-} // namespace circ
-} // namespace ipc
diff --git a/src/libipc/circ/elem_def.h b/src/libipc/circ/elem_def.h
deleted file mode 100755
index 40039480..00000000
--- a/src/libipc/circ/elem_def.h
+++ /dev/null
@@ -1,109 +0,0 @@
-#pragma once
-
-#include <atomic>
-#include <cstddef>
-#include <cstdint>
-#include <new>
-
-#include "libipc/def.h"
-#include "libipc/rw_lock.h"
-
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace circ {
-
-using u1_t = ipc::uint_t<8>;
-using u2_t = ipc::uint_t<32>;
-
-/** only supports max 32 connections in broadcast mode */
-using cc_t = u2_t;
-
-constexpr u1_t index_of(u2_t c) noexcept {
-    return static_cast<u1_t>(c);
-}
-
-class conn_head_base {
-protected:
-    std::atomic<cc_t> cc_{0}; // connections
-    ipc::spin_lock lc_;
-    std::atomic<bool> constructed_{false};
-
-public:
-    void init() {
-        /* DCLP */
-        if (!constructed_.load(std::memory_order_acquire)) {
-            IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lc_);
-            if (!constructed_.load(std::memory_order_relaxed)) {
-                ::new (this) conn_head_base;
-                constructed_.store(true, std::memory_order_release);
-            }
-        }
-    }
-
-    conn_head_base() = default;
-    conn_head_base(conn_head_base const &) = delete;
-    conn_head_base &operator=(conn_head_base const &) = delete;
-
-    cc_t connections(std::memory_order order = std::memory_order_acquire) const noexcept {
-        return this->cc_.load(order);
-    }
-};
-
-template <typename P, bool = relat_trait<P>::is_broadcast>
-class conn_head;
-
-template <typename P>
-class conn_head<P, true> : public conn_head_base {
-public:
-    cc_t connect() noexcept {
-        for (unsigned k = 0;; ipc::yield(k)) {
-            cc_t curr = this->cc_.load(std::memory_order_acquire);
-            cc_t next = curr | (curr + 1); // find the first 0, and set it to 1.
-            if (next == 0) {
-                // connection-slot is full.
-                return 0;
-            }
-            if (this->cc_.compare_exchange_weak(curr, next, std::memory_order_release)) {
-                return next ^ curr; // return connected id
-            }
-        }
-    }
-
-    cc_t disconnect(cc_t cc_id) noexcept {
-        return this->cc_.fetch_and(~cc_id, std::memory_order_acq_rel) & ~cc_id;
-    }
-
-    std::size_t conn_count(std::memory_order order = std::memory_order_acquire) const noexcept {
-        cc_t cur = this->cc_.load(order);
-        cc_t cnt; // accumulates the total bits set in cc
-        for (cnt = 0; cur; ++cnt) cur &= cur - 1;
-        return cnt;
-    }
-};
-
-template <typename P>
-class conn_head<P, false> : public conn_head_base {
-public:
-    cc_t connect() noexcept {
-        return this->cc_.fetch_add(1, std::memory_order_relaxed) + 1;
-    }
-
-    cc_t disconnect(cc_t cc_id) noexcept {
-        if (cc_id == ~static_cast<circ::cc_t>(0u)) {
-            // clear all connections
-            this->cc_.store(0, std::memory_order_relaxed);
-            return 0u;
-        }
-        else {
-            return this->cc_.fetch_sub(1, std::memory_order_relaxed) - 1;
-        }
-    }
-
-    std::size_t conn_count(std::memory_order order = std::memory_order_acquire) const noexcept {
-        return this->connections(order);
-    }
-};
-
-} // namespace circ
-} // namespace ipc
diff --git a/src/libipc/event.cpp b/src/libipc/event.cpp
new file mode 100644
index 00000000..5fa762da
--- /dev/null
+++ b/src/libipc/event.cpp
@@ -0,0 +1,27 @@
+
+#include "libimp/log.h"
+
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+# include "libipc/platform/win/event_impl.h"
+#else
+#endif
+
+#if !defined(LIBIMP_OS_LINUX)
+LIBIPC_NAMESPACE_BEG_
+
+/// \brief C style event access interface implementation.
+
+std::string evt_name(evt_t evt) noexcept {
+  LIBIMP_LOG_();
+  if (!is_valid(evt)) {
+    log.error("handle is null.");
+    return {};
+  }
+  return evt->name;
+}
+
+/// \brief The event object.
+
+LIBIPC_NAMESPACE_END_
+#endif
diff --git a/src/libipc/ipc.cpp b/src/libipc/ipc.cpp
index c864a1b1..c7f4a864 100755
--- a/src/libipc/ipc.cpp
+++ b/src/libipc/ipc.cpp
@@ -1,695 +1,2 @@
 
-#include <type_traits>
-#include <cstring>
-#include <algorithm>
-#include <utility>          // std::pair, std::move, std::forward
-#include <atomic>
-#include <type_traits>      // aligned_storage_t
-#include <string>
-#include <vector>
-#include <array>
-#include <cassert>
-
-#include "libipc/ipc.h"
-#include "libipc/def.h"
-#include "libipc/shm.h"
-#include "libipc/pool_alloc.h"
-#include "libipc/queue.h"
-#include "libipc/policy.h"
-#include "libipc/rw_lock.h"
-#include "libipc/waiter.h"
-
-#include "libipc/utility/log.h"
-#include "libipc/utility/id_pool.h"
-#include "libipc/utility/scope_guard.h"
-#include "libipc/utility/utility.h"
-
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-#include "libipc/circ/elem_array.h"
-
-namespace {
-
-using msg_id_t = std::uint32_t;
-using acc_t    = std::atomic<msg_id_t>;
-
-template <std::size_t DataSize, std::size_t AlignSize>
-struct msg_t;
-
-template <std::size_t AlignSize>
-struct msg_t<0, AlignSize> {
-    msg_id_t     cc_id_;
-    msg_id_t     id_;
-    std::int32_t remain_;
-    bool         storage_;
-};
-
-template <std::size_t DataSize, std::size_t AlignSize>
-struct msg_t : msg_t<0, AlignSize> {
-    std::aligned_storage_t<DataSize, AlignSize> data_ {};
-
-    msg_t() = default;
-    msg_t(msg_id_t cc_id, msg_id_t id, std::int32_t remain, void const * data, std::size_t size)
-        : msg_t<0, AlignSize> {cc_id, id, remain, (data == nullptr) || (size == 0)} {
-        if (this->storage_) {
-            if (data != nullptr) {
-                // copy storage-id
-                *reinterpret_cast<ipc::storage_id_t*>(&data_) =
-                     *static_cast<ipc::storage_id_t const *>(data);
-            }
-        }
-        else std::memcpy(&data_, data, size);
-    }
-};
-
-template <typename T>
-ipc::buff_t make_cache(T& data, std::size_t size) {
-    auto ptr = ipc::mem::alloc(size);
-    std::memcpy(ptr, &data, (ipc::detail::min)(sizeof(data), size));
-    return { ptr, size, ipc::mem::free };
-}
-
-struct cache_t {
-    std::size_t fill_;
-    ipc::buff_t buff_;
-
-    cache_t(std::size_t f, ipc::buff_t && b)
-        : fill_(f), buff_(std::move(b))
-    {}
-
-    void append(void const * data, std::size_t size) {
-        if (fill_ >= buff_.size() || data == nullptr || size == 0) return;
-        auto new_fill = (ipc::detail::min)(fill_ + size, buff_.size());
-        std::memcpy(static_cast<ipc::byte_t*>(buff_.data()) + fill_, data, new_fill - fill_);
-        fill_ = new_fill;
-    }
-};
-
-auto cc_acc() {
-    static ipc::shm::handle acc_h("__CA_CONN__", sizeof(acc_t));
-    return static_cast<acc_t*>(acc_h.get());
-}
-
-IPC_CONSTEXPR_ std::size_t align_chunk_size(std::size_t size) noexcept {
-    return (((size - 1) / ipc::large_msg_align) + 1) * ipc::large_msg_align;
-}
-
-IPC_CONSTEXPR_ std::size_t calc_chunk_size(std::size_t size) noexcept {
-    return ipc::make_align(alignof(std::max_align_t), align_chunk_size(
-           ipc::make_align(alignof(std::max_align_t), sizeof(std::atomic<ipc::circ::cc_t>)) + size));
-}
-
-struct chunk_t {
-    std::atomic<ipc::circ::cc_t> &conns() noexcept {
-        return *reinterpret_cast<std::atomic<ipc::circ::cc_t> *>(this);
-    }
-
-    void *data() noexcept {
-        return reinterpret_cast<ipc::byte_t *>(this)
-             + ipc::make_align(alignof(std::max_align_t), sizeof(std::atomic<ipc::circ::cc_t>));
-    }
-};
-
-struct chunk_info_t {
-    ipc::id_pool<> pool_;
-    ipc::spin_lock lock_;
-
-    IPC_CONSTEXPR_ static std::size_t chunks_mem_size(std::size_t chunk_size) noexcept {
-        return ipc::id_pool<>::max_count * chunk_size;
-    }
-
-    ipc::byte_t *chunks_mem() noexcept {
-        return reinterpret_cast<ipc::byte_t *>(this + 1);
-    }
-
-    chunk_t *at(std::size_t chunk_size, ipc::storage_id_t id) noexcept {
-        if (id < 0) return nullptr;
-        return reinterpret_cast<chunk_t *>(chunks_mem() + (chunk_size * id));
-    }
-};
-
-auto& chunk_storages() {
-    class chunk_handle_t {
-        ipc::shm::handle handle_;
-
-    public:
-        chunk_info_t *get_info(std::size_t chunk_size) {
-            if (!handle_.valid() &&
-                !handle_.acquire( ("__CHUNK_INFO__" + ipc::to_string(chunk_size)).c_str(), 
-                                  sizeof(chunk_info_t) + chunk_info_t::chunks_mem_size(chunk_size) )) {
-                ipc::error("[chunk_storages] chunk_shm.id_info_.acquire failed: chunk_size = %zd\n", chunk_size);
-                return nullptr;
-            }
-            auto info = static_cast<chunk_info_t*>(handle_.get());
-            if (info == nullptr) {
-                ipc::error("[chunk_storages] chunk_shm.id_info_.get failed: chunk_size = %zd\n", chunk_size);
-                return nullptr;
-            }
-            return info;
-        }
-    };
-    static ipc::map<std::size_t, chunk_handle_t> chunk_hs;
-    return chunk_hs;
-}
-
-chunk_info_t *chunk_storage_info(std::size_t chunk_size) {
-    auto &storages = chunk_storages();
-    std::decay_t<decltype(storages)>::iterator it;
-    {
-        static ipc::rw_lock lock;
-        IPC_UNUSED_ std::shared_lock<ipc::rw_lock> guard {lock};
-        if ((it = storages.find(chunk_size)) == storages.end()) {
-            using chunk_handle_t = std::decay_t<decltype(storages)>::value_type::second_type;
-            guard.unlock();
-            IPC_UNUSED_ std::lock_guard<ipc::rw_lock> guard {lock};
-            it = storages.emplace(chunk_size, chunk_handle_t{}).first;
-        }
-    }
-    return it->second.get_info(chunk_size);
-}
-
-std::pair<ipc::storage_id_t, void*> acquire_storage(std::size_t size, ipc::circ::cc_t conns) {
-    std::size_t chunk_size = calc_chunk_size(size);
-    auto info = chunk_storage_info(chunk_size);
-    if (info == nullptr) return {};
-
-    info->lock_.lock();
-    info->pool_.prepare();
-    // got an unique id
-    auto id = info->pool_.acquire();
-    info->lock_.unlock();
-
-    auto chunk = info->at(chunk_size, id);
-    if (chunk == nullptr) return {};
-    chunk->conns().store(conns, std::memory_order_relaxed);
-    return { id, chunk->data() };
-}
-
-void *find_storage(ipc::storage_id_t id, std::size_t size) {
-    if (id < 0) {
-        ipc::error("[find_storage] id is invalid: id = %ld, size = %zd\n", (long)id, size);
-        return nullptr;
-    }
-    std::size_t chunk_size = calc_chunk_size(size);
-    auto info = chunk_storage_info(chunk_size);
-    if (info == nullptr) return nullptr;
-    return info->at(chunk_size, id)->data();
-}
-
-void release_storage(ipc::storage_id_t id, std::size_t size) {
-    if (id < 0) {
-        ipc::error("[release_storage] id is invalid: id = %ld, size = %zd\n", (long)id, size);
-        return;
-    }
-    std::size_t chunk_size = calc_chunk_size(size);
-    auto info = chunk_storage_info(chunk_size);
-    if (info == nullptr) return;
-    info->lock_.lock();
-    info->pool_.release(id);
-    info->lock_.unlock();
-}
-
-template <ipc::relat Rp, ipc::relat Rc>
-bool sub_rc(ipc::wr<Rp, Rc, ipc::trans::unicast>, 
-            std::atomic<ipc::circ::cc_t> &/*conns*/, ipc::circ::cc_t /*curr_conns*/, ipc::circ::cc_t /*conn_id*/) noexcept {
-    return true;
-}
-
-template <ipc::relat Rp, ipc::relat Rc>
-bool sub_rc(ipc::wr<Rp, Rc, ipc::trans::broadcast>, 
-            std::atomic<ipc::circ::cc_t> &conns, ipc::circ::cc_t curr_conns, ipc::circ::cc_t conn_id) noexcept {
-    auto last_conns = curr_conns & ~conn_id;
-    for (unsigned k = 0;;) {
-        auto chunk_conns  = conns.load(std::memory_order_acquire);
-        if (conns.compare_exchange_weak(chunk_conns, chunk_conns & last_conns, std::memory_order_release)) {
-            return (chunk_conns & last_conns) == 0;
-        }
-        ipc::yield(k);
-    }
-}
-
-template <typename Flag>
-void recycle_storage(ipc::storage_id_t id, std::size_t size, ipc::circ::cc_t curr_conns, ipc::circ::cc_t conn_id) {
-    if (id < 0) {
-        ipc::error("[recycle_storage] id is invalid: id = %ld, size = %zd\n", (long)id, size);
-        return;
-    }
-    std::size_t chunk_size = calc_chunk_size(size);
-    auto info = chunk_storage_info(chunk_size);
-    if (info == nullptr) return;
-
-    auto chunk = info->at(chunk_size, id);
-    if (chunk == nullptr) return;
-
-    if (!sub_rc(Flag{}, chunk->conns(), curr_conns, conn_id)) {
-        return;
-    }
-    info->lock_.lock();
-    info->pool_.release(id);
-    info->lock_.unlock();
-}
-
-template <typename MsgT>
-bool clear_message(void* p) {
-    auto msg = static_cast<MsgT*>(p);
-    if (msg->storage_) {
-        std::int32_t r_size = static_cast<std::int32_t>(ipc::data_length) + msg->remain_;
-        if (r_size <= 0) {
-            ipc::error("[clear_message] invalid msg size: %d\n", (int)r_size);
-            return true;
-        }
-        release_storage(
-            *reinterpret_cast<ipc::storage_id_t*>(&msg->data_),
-            static_cast<std::size_t>(r_size));
-    }
-    return true;
-}
-
-struct conn_info_head {
-
-    ipc::string name_;
-    msg_id_t    cc_id_; // connection-info id
-    ipc::detail::waiter cc_waiter_, wt_waiter_, rd_waiter_;
-    ipc::shm::handle acc_h_;
-
-    conn_info_head(char const * name)
-        : name_     {name}
-        , cc_id_    {(cc_acc() == nullptr) ? 0 : cc_acc()->fetch_add(1, std::memory_order_relaxed)}
-        , cc_waiter_{("__CC_CONN__" + name_).c_str()}
-        , wt_waiter_{("__WT_CONN__" + name_).c_str()}
-        , rd_waiter_{("__RD_CONN__" + name_).c_str()}
-        , acc_h_    {("__AC_CONN__" + name_).c_str(), sizeof(acc_t)} {
-    }
-
-    void quit_waiting() {
-        cc_waiter_.quit_waiting();
-        wt_waiter_.quit_waiting();
-        rd_waiter_.quit_waiting();
-    }
-
-    auto acc() {
-        return static_cast<acc_t*>(acc_h_.get());
-    }
-
-    auto& recv_cache() {
-        thread_local ipc::unordered_map<msg_id_t, cache_t> tls;
-        return tls;
-    }
-};
-
-template <typename W, typename F>
-bool wait_for(W& waiter, F&& pred, std::uint64_t tm) {
-    if (tm == 0) return !pred();
-    for (unsigned k = 0; pred();) {
-        bool ret = true;
-        ipc::sleep(k, [&k, &ret, &waiter, &pred, tm] {
-            ret = waiter.wait_if(std::forward<F>(pred), tm);
-            k   = 0;
-        });
-        if (!ret) return false; // timeout or fail
-        if (k == 0) break; // k has been reset
-    }
-    return true;
-}
-
-template <typename Policy,
-          std::size_t DataSize  = ipc::data_length,
-          std::size_t AlignSize = (ipc::detail::min)(DataSize, alignof(std::max_align_t))>
-struct queue_generator {
-
-    using queue_t = ipc::queue<msg_t<DataSize, AlignSize>, Policy>;
-
-    struct conn_info_t : conn_info_head {
-        queue_t que_;
-
-        conn_info_t(char const * name)
-            : conn_info_head{name}
-            , que_{("__QU_CONN__" +
-                    ipc::to_string(DataSize) + "__" +
-                    ipc::to_string(AlignSize) + "__" + name).c_str()} {
-        }
-
-        void disconnect_receiver() {
-            bool dis = que_.disconnect();
-            this->quit_waiting();
-            if (dis) {
-                this->recv_cache().clear();
-            }
-        }
-    };
-};
-
-template <typename Policy>
-struct detail_impl {
-
-using policy_t    = Policy;
-using flag_t      = typename policy_t::flag_t;
-using queue_t     = typename queue_generator<policy_t>::queue_t;
-using conn_info_t = typename queue_generator<policy_t>::conn_info_t;
-
-constexpr static conn_info_t* info_of(ipc::handle_t h) noexcept {
-    return static_cast<conn_info_t*>(h);
-}
-
-constexpr static queue_t* queue_of(ipc::handle_t h) noexcept {
-    return (info_of(h) == nullptr) ? nullptr : &(info_of(h)->que_);
-}
-
-/* API implementations */
-
-static void disconnect(ipc::handle_t h) {
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        return;
-    }
-    que->shut_sending();
-    assert(info_of(h) != nullptr);
-    info_of(h)->disconnect_receiver();
-}
-
-static bool reconnect(ipc::handle_t * ph, bool start_to_recv) {
-    assert(ph != nullptr);
-    assert(*ph != nullptr);
-    auto que = queue_of(*ph);
-    if (que == nullptr) {
-        return false;
-    }
-    if (start_to_recv) {
-        que->shut_sending();
-        if (que->connect()) { // wouldn't connect twice
-            info_of(*ph)->cc_waiter_.broadcast();
-            return true;
-        }
-        return false;
-    }
-    // start_to_recv == false
-    if (que->connected()) {
-        info_of(*ph)->disconnect_receiver();
-    }
-    return que->ready_sending();
-}
-
-static bool connect(ipc::handle_t * ph, char const * name, bool start_to_recv) {
-    assert(ph != nullptr);
-    if (*ph == nullptr) {
-        *ph = ipc::mem::alloc<conn_info_t>(name);
-    }
-    return reconnect(ph, start_to_recv);
-}
-
-static void destroy(ipc::handle_t h) {
-    disconnect(h);
-    ipc::mem::free(info_of(h));
-}
-
-static std::size_t recv_count(ipc::handle_t h) noexcept {
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        return ipc::invalid_value;
-    }
-    return que->conn_count();
-}
-
-static bool wait_for_recv(ipc::handle_t h, std::size_t r_count, std::uint64_t tm) {
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        return false;
-    }
-    return wait_for(info_of(h)->cc_waiter_, [que, r_count] {
-        return que->conn_count() < r_count;
-    }, tm);
-}
-
-template <typename F>
-static bool send(F&& gen_push, ipc::handle_t h, void const * data, std::size_t size) {
-    if (data == nullptr || size == 0) {
-        ipc::error("fail: send(%p, %zd)\n", data, size);
-        return false;
-    }
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        ipc::error("fail: send, queue_of(h) == nullptr\n");
-        return false;
-    }
-    if (que->elems() == nullptr) {
-        ipc::error("fail: send, queue_of(h)->elems() == nullptr\n");
-        return false;
-    }
-    if (!que->ready_sending()) {
-        ipc::error("fail: send, que->ready_sending() == false\n");
-        return false;
-    }
-    ipc::circ::cc_t conns = que->elems()->connections(std::memory_order_relaxed);
-    if (conns == 0) {
-        ipc::error("fail: send, there is no receiver on this connection.\n");
-        return false;
-    }
-    // calc a new message id
-    auto acc = info_of(h)->acc();
-    if (acc == nullptr) {
-        ipc::error("fail: send, info_of(h)->acc() == nullptr\n");
-        return false;
-    }
-    auto msg_id   = acc->fetch_add(1, std::memory_order_relaxed);
-    auto try_push = std::forward<F>(gen_push)(info_of(h), que, msg_id);
-    if (size > ipc::large_msg_limit) {
-        auto   dat = acquire_storage(size, conns);
-        void * buf = dat.second;
-        if (buf != nullptr) {
-            std::memcpy(buf, data, size);
-            return try_push(static_cast<std::int32_t>(size) - 
-                            static_cast<std::int32_t>(ipc::data_length), &(dat.first), 0);
-        }
-        // try using message fragment
-        //ipc::log("fail: shm::handle for big message. msg_id: %zd, size: %zd\n", msg_id, size);
-    }
-    // push message fragment
-    std::int32_t offset = 0;
-    for (std::int32_t i = 0; i < static_cast<std::int32_t>(size / ipc::data_length); ++i, offset += ipc::data_length) {
-        if (!try_push(static_cast<std::int32_t>(size) - offset - static_cast<std::int32_t>(ipc::data_length),
-                      static_cast<ipc::byte_t const *>(data) + offset, ipc::data_length)) {
-            return false;
-        }
-    }
-    // if remain > 0, this is the last message fragment
-    std::int32_t remain = static_cast<std::int32_t>(size) - offset;
-    if (remain > 0) {
-        if (!try_push(remain - static_cast<std::int32_t>(ipc::data_length),
-                      static_cast<ipc::byte_t const *>(data) + offset, 
-                      static_cast<std::size_t>(remain))) {
-            return false;
-        }
-    }
-    return true;
-}
-
-static bool send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
-    return send([tm](auto info, auto que, auto msg_id) {
-        return [tm, info, que, msg_id](std::int32_t remain, void const * data, std::size_t size) {
-            if (!wait_for(info->wt_waiter_, [&] {
-                    return !que->push(
-                        [](void*) { return true; },
-                        info->cc_id_, msg_id, remain, data, size);
-                }, tm)) {
-                ipc::log("force_push: msg_id = %zd, remain = %d, size = %zd\n", msg_id, remain, size);
-                if (!que->force_push(
-                        clear_message<typename queue_t::value_t>,
-                        info->cc_id_, msg_id, remain, data, size)) {
-                    return false;
-                }
-            }
-            info->rd_waiter_.broadcast();
-            return true;
-        };
-    }, h, data, size);
-}
-
-static bool try_send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
-    return send([tm](auto info, auto que, auto msg_id) {
-        return [tm, info, que, msg_id](std::int32_t remain, void const * data, std::size_t size) {
-            if (!wait_for(info->wt_waiter_, [&] {
-                    return !que->push(
-                        [](void*) { return true; },
-                        info->cc_id_, msg_id, remain, data, size);
-                }, tm)) {
-                return false;
-            }
-            info->rd_waiter_.broadcast();
-            return true;
-        };
-    }, h, data, size);
-}
-
-static ipc::buff_t recv(ipc::handle_t h, std::uint64_t tm) {
-    auto que = queue_of(h);
-    if (que == nullptr) {
-        ipc::error("fail: recv, queue_of(h) == nullptr\n");
-        return {};
-    }
-    if (!que->connected()) {
-        // hasn't connected yet, just return.
-        return {};
-    }
-    auto& rc = info_of(h)->recv_cache();
-    for (;;) {
-        // pop a new message
-        typename queue_t::value_t msg;
-        if (!wait_for(info_of(h)->rd_waiter_, [que, &msg] {
-                return !que->pop(msg);
-            }, tm)) {
-            // pop failed, just return.
-            return {};
-        }
-        info_of(h)->wt_waiter_.broadcast();
-        if ((info_of(h)->acc() != nullptr) && (msg.cc_id_ == info_of(h)->cc_id_)) {
-            continue; // ignore message to self
-        }
-        // msg.remain_ may minus & abs(msg.remain_) < data_length
-        std::int32_t r_size = static_cast<std::int32_t>(ipc::data_length) + msg.remain_;
-        if (r_size <= 0) {
-            ipc::error("fail: recv, r_size = %d\n", (int)r_size);
-            return {};
-        }
-        std::size_t msg_size = static_cast<std::size_t>(r_size);
-        // large message
-        if (msg.storage_) {
-            ipc::storage_id_t buf_id = *reinterpret_cast<ipc::storage_id_t*>(&msg.data_);
-            void* buf = find_storage(buf_id, msg_size);
-            if (buf != nullptr) {
-                struct recycle_t {
-                    ipc::storage_id_t storage_id;
-                    ipc::circ::cc_t   curr_conns;
-                    ipc::circ::cc_t   conn_id;
-                } *r_info = ipc::mem::alloc<recycle_t>(recycle_t{
-                    buf_id, que->elems()->connections(std::memory_order_relaxed), que->connected_id()
-                });
-                if (r_info == nullptr) {
-                    ipc::log("fail: ipc::mem::alloc<recycle_t>.\n");
-                    return ipc::buff_t{buf, msg_size}; // no recycle
-                } else {
-                    return ipc::buff_t{buf, msg_size, [](void* p_info, std::size_t size) {
-                        auto r_info = static_cast<recycle_t *>(p_info);
-                        IPC_UNUSED_ auto finally = ipc::guard([r_info] {
-                            ipc::mem::free(r_info);
-                        });
-                        recycle_storage<flag_t>(r_info->storage_id, size, r_info->curr_conns, r_info->conn_id);
-                    }, r_info};
-                }
-            } else {
-                ipc::log("fail: shm::handle for large message. msg_id: %zd, buf_id: %zd, size: %zd\n", msg.id_, buf_id, msg_size);
-                continue;
-            }
-        }
-        // find cache with msg.id_
-        auto cac_it = rc.find(msg.id_);
-        if (cac_it == rc.end()) {
-            if (msg_size <= ipc::data_length) {
-                return make_cache(msg.data_, msg_size);
-            }
-            // gc
-            if (rc.size() > 1024) {
-                std::vector<msg_id_t> need_del;
-                for (auto const & pair : rc) {
-                    auto cmp = std::minmax(msg.id_, pair.first);
-                    if (cmp.second - cmp.first > 8192) {
-                        need_del.push_back(pair.first);
-                    }
-                }
-                for (auto id : need_del) rc.erase(id);
-            }
-            // cache the first message fragment
-            rc.emplace(msg.id_, cache_t { ipc::data_length, make_cache(msg.data_, msg_size) });
-        }
-        // has cached before this message
-        else {
-            auto& cac = cac_it->second;
-            // this is the last message fragment
-            if (msg.remain_ <= 0) {
-                cac.append(&(msg.data_), msg_size);
-                // finish this message, erase it from cache
-                auto buff = std::move(cac.buff_);
-                rc.erase(cac_it);
-                return buff;
-            }
-            // there are remain datas after this message
-            cac.append(&(msg.data_), ipc::data_length);
-        }
-    }
-}
-
-static ipc::buff_t try_recv(ipc::handle_t h) {
-    return recv(h, 0);
-}
-
-}; // detail_impl<Policy>
-
-template <typename Flag>
-using policy_t = ipc::policy::choose<ipc::circ::elem_array, Flag>;
-
-} // internal-linkage
-
-namespace ipc {
-
-template <typename Flag>
-bool chan_impl<Flag>::connect(ipc::handle_t * ph, char const * name, unsigned mode) {
-    return detail_impl<policy_t<Flag>>::connect(ph, name, mode & receiver);
-}
-
-template <typename Flag>
-bool chan_impl<Flag>::reconnect(ipc::handle_t * ph, unsigned mode) {
-    return detail_impl<policy_t<Flag>>::reconnect(ph, mode & receiver);
-}
-
-template <typename Flag>
-void chan_impl<Flag>::disconnect(ipc::handle_t h) {
-    detail_impl<policy_t<Flag>>::disconnect(h);
-}
-
-template <typename Flag>
-void chan_impl<Flag>::destroy(ipc::handle_t h) {
-    detail_impl<policy_t<Flag>>::destroy(h);
-}
-
-template <typename Flag>
-char const * chan_impl<Flag>::name(ipc::handle_t h) {
-    auto info = detail_impl<policy_t<Flag>>::info_of(h);
-    return (info == nullptr) ? nullptr : info->name_.c_str();
-}
-
-template <typename Flag>
-std::size_t chan_impl<Flag>::recv_count(ipc::handle_t h) {
-    return detail_impl<policy_t<Flag>>::recv_count(h);
-}
-
-template <typename Flag>
-bool chan_impl<Flag>::wait_for_recv(ipc::handle_t h, std::size_t r_count, std::uint64_t tm) {
-    return detail_impl<policy_t<Flag>>::wait_for_recv(h, r_count, tm);
-}
-
-template <typename Flag>
-bool chan_impl<Flag>::send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
-    return detail_impl<policy_t<Flag>>::send(h, data, size, tm);
-}
-
-template <typename Flag>
-buff_t chan_impl<Flag>::recv(ipc::handle_t h, std::uint64_t tm) {
-    return detail_impl<policy_t<Flag>>::recv(h, tm);
-}
-
-template <typename Flag>
-bool chan_impl<Flag>::try_send(ipc::handle_t h, void const * data, std::size_t size, std::uint64_t tm) {
-    return detail_impl<policy_t<Flag>>::try_send(h, data, size, tm);
-}
-
-template <typename Flag>
-buff_t chan_impl<Flag>::try_recv(ipc::handle_t h) {
-    return detail_impl<policy_t<Flag>>::try_recv(h);
-}
-
-template struct chan_impl<ipc::wr<relat::single, relat::single, trans::unicast  >>;
-// template struct chan_impl<ipc::wr<relat::single, relat::multi , trans::unicast  >>; // TBD
-// template struct chan_impl<ipc::wr<relat::multi , relat::multi , trans::unicast  >>; // TBD
-template struct chan_impl<ipc::wr<relat::single, relat::multi , trans::broadcast>>;
-template struct chan_impl<ipc::wr<relat::multi , relat::multi , trans::broadcast>>;
-
-} // namespace ipc
+#include "libipc/def.h"
\ No newline at end of file
diff --git a/src/libipc/memory/alloc.h b/src/libipc/memory/alloc.h
deleted file mode 100755
index 16bebc95..00000000
--- a/src/libipc/memory/alloc.h
+++ /dev/null
@@ -1,424 +0,0 @@
-#pragma once
-
-#include <algorithm>
-#include <utility>
-#include <iterator>
-#include <limits>       // std::numeric_limits
-#include <cstdlib>
-#include <cassert>      // assert
-
-#include "libipc/def.h"
-#include "libipc/rw_lock.h"
-
-#include "libipc/utility/concept.h"
-#include "libipc/memory/allocator_wrapper.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace mem {
-
-class static_alloc {
-public:
-    static void swap(static_alloc&) {}
-
-    static void* alloc(std::size_t size) {
-        return size ? std::malloc(size) : nullptr;
-    }
-
-    static void free(void* p) {
-        std::free(p);
-    }
-
-    static void free(void* p, std::size_t /*size*/) {
-        free(p);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Scope allocation -- The destructor will release all allocated blocks.
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-constexpr std::size_t aligned(std::size_t size, size_t alignment) noexcept {
-    return ( (size - 1) & ~(alignment - 1) ) + alignment;
-}
-
-IPC_CONCEPT_(has_take, take(std::move(std::declval<Type>())));
-
-class scope_alloc_base {
-protected:
-    struct block_t {
-        std::size_t size_;
-        block_t   * next_;
-    } * head_ = nullptr, * tail_ = nullptr;
-
-    enum : std::size_t {
-        aligned_block_size = aligned(sizeof(block_t), alignof(std::max_align_t))
-    };
-
-public:
-    void swap(scope_alloc_base & rhs) {
-        std::swap(head_, rhs.head_);
-        std::swap(tail_, rhs.tail_);
-    }
-
-    bool empty() const noexcept {
-        return head_ == nullptr;
-    }
-
-    void take(scope_alloc_base && rhs) {
-        if (rhs.empty()) return;
-        if (empty()) swap(rhs);
-        else {
-            std::swap(tail_->next_, rhs.head_);
-            // rhs.head_ should be nullptr here
-            tail_ = rhs.tail_;
-            rhs.tail_ = nullptr;
-        }
-    }
-
-    void free(void* /*p*/) {}
-    void free(void* /*p*/, std::size_t) {}
-};
-
-} // namespace detail
-
-template <typename AllocP = static_alloc>
-class scope_alloc : public detail::scope_alloc_base {
-public:
-    using base_t = detail::scope_alloc_base;
-    using alloc_policy = AllocP;
-
-private:
-    alloc_policy alloc_;
-
-    void free_all() {
-        while (!empty()) {
-            auto curr = head_;
-            head_ = head_->next_;
-            alloc_.free(curr, curr->size_);
-        }
-        // now head_ is nullptr
-    }
-
-public:
-    scope_alloc() = default;
-
-    scope_alloc(scope_alloc && rhs)         { swap(rhs); }
-    scope_alloc& operator=(scope_alloc rhs) { swap(rhs); return (*this); }
-
-    ~scope_alloc() { free_all(); }
-
-    void swap(scope_alloc& rhs) {
-        alloc_.swap(rhs.alloc_);
-        base_t::swap(rhs);
-    }
-
-    template <typename A = AllocP>
-    auto take(scope_alloc && rhs) -> ipc::require<detail::has_take<A>::value> {
-        base_t::take(std::move(rhs));
-        alloc_.take(std::move(rhs.alloc_));
-    }
-
-    template <typename A = AllocP>
-    auto take(scope_alloc && rhs) -> ipc::require<!detail::has_take<A>::value> {
-        base_t::take(std::move(rhs));
-    }
-
-    void* alloc(std::size_t size) {
-        std::size_t real_size = aligned_block_size + size;
-        auto curr = static_cast<block_t*>(alloc_.alloc(real_size));
-        curr->size_ = real_size;
-        curr->next_ = head_;
-        head_ = curr;
-        if (tail_ == nullptr) {
-            tail_ = curr;
-        }
-        return (reinterpret_cast<byte_t*>(curr) + aligned_block_size);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Fixed-size blocks allocation
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-class fixed_alloc_base {
-protected:
-    std::size_t block_size_;
-    std::size_t init_expand_;
-    void      * cursor_;
-
-    void init(std::size_t block_size, std::size_t init_expand) {
-        block_size_  = block_size;
-        init_expand_ = init_expand;
-        cursor_      = nullptr;
-    }
-
-    static void** node_p(void* node) {
-        return reinterpret_cast<void**>(node);
-    }
-
-    static auto& next(void* node) {
-        return *node_p(node);
-    }
-
-public:
-    bool operator<(fixed_alloc_base const & right) const {
-        return init_expand_ < right.init_expand_;
-    }
-
-    void set_block_size(std::size_t block_size) {
-        block_size_ = block_size;
-    }
-
-    void swap(fixed_alloc_base& rhs) {
-        std::swap(block_size_ , rhs.block_size_);
-        std::swap(init_expand_, rhs.init_expand_);
-        std::swap(cursor_     , rhs.cursor_);
-    }
-
-    bool empty() const noexcept {
-        return cursor_ == nullptr;
-    }
-
-    void take(fixed_alloc_base && rhs) {
-        assert(block_size_ == rhs.block_size_);
-        init_expand_ = (ipc::detail::max)(init_expand_, rhs.init_expand_);
-        if (rhs.empty()) return;
-        auto curr = cursor_;
-        if (curr != nullptr) while (1) {
-            auto next_cur = next(curr);
-            if (next_cur == nullptr) {
-                std::swap(next(curr), rhs.cursor_);
-                return;
-            }
-            // next_cur != nullptr
-            else curr = next_cur;
-        }
-        // curr == nullptr, means cursor_ == nullptr
-        else std::swap(cursor_, rhs.cursor_);
-        // rhs.cursor_ must be nullptr
-    }
-
-    void free(void* p) {
-        if (p == nullptr) return;
-        next(p) = cursor_;
-        cursor_ = p;
-    }
-
-    void free(void* p, std::size_t) {
-        free(p);
-    }
-};
-
-template <typename AllocP, typename ExpandP>
-class fixed_alloc : public detail::fixed_alloc_base {
-public:
-    using base_t = detail::fixed_alloc_base;
-    using alloc_policy = AllocP;
-
-private:
-    alloc_policy alloc_;
-
-    void* try_expand() {
-        if (empty()) {
-            auto size = ExpandP::next(block_size_, init_expand_);
-            auto p = node_p(cursor_ = alloc_.alloc(size));
-            for (std::size_t i = 0; i < (size / block_size_) - 1; ++i)
-                p = node_p((*p) = reinterpret_cast<byte_t*>(p) + block_size_);
-            (*p) = nullptr;
-        }
-        return cursor_;
-    }
-
-public:
-    explicit fixed_alloc(std::size_t block_size, std::size_t init_expand = 1) {
-        init(block_size, init_expand);
-    }
-
-    fixed_alloc(fixed_alloc && rhs) {
-        init(0, 0);
-        swap(rhs);
-    }
-
-    fixed_alloc& operator=(fixed_alloc rhs) {
-        swap(rhs);
-        return (*this);
-    }
-
-    void swap(fixed_alloc& rhs) {
-        alloc_.swap(rhs.alloc_);
-        base_t::swap(rhs);
-    }
-
-    template <typename A = AllocP>
-    auto take(fixed_alloc && rhs) -> ipc::require<detail::has_take<A>::value> {
-        base_t::take(std::move(rhs));
-        alloc_.take(std::move(rhs.alloc_));
-    }
-
-    void* alloc() {
-        void* p = try_expand();
-        cursor_ = next(p);
-        return p;
-    }
-
-    void* alloc(std::size_t) {
-        return alloc();
-    }
-};
-
-} // namespace detail
-
-template <std::size_t BaseSize  = sizeof(void*) * 1024, 
-          std::size_t LimitSize = (std::numeric_limits<std::uint32_t>::max)()>
-struct fixed_expand_policy {
-
-    enum : std::size_t {
-        base_size  = BaseSize,
-        limit_size = LimitSize
-    };
-
-    constexpr static std::size_t prev(std::size_t e) noexcept {
-        return ((e / 2) == 0) ? 1 : (e / 2);
-    }
-
-    constexpr static std::size_t next(std::size_t e) noexcept {
-        return e * 2;
-    }
-
-    static std::size_t next(std::size_t block_size, std::size_t & e) {
-        auto n = ipc::detail::max<std::size_t>(block_size, base_size) * e;
-             e = ipc::detail::min<std::size_t>(limit_size, next(e));
-        return n;
-    }
-};
-
-template <std::size_t BlockSize,
-          typename AllocP  = scope_alloc<>,
-          typename ExpandP = fixed_expand_policy<>>
-class fixed_alloc : public detail::fixed_alloc<AllocP, ExpandP> {
-public:
-    using base_t = detail::fixed_alloc<AllocP, ExpandP>;
-
-    enum : std::size_t {
-        block_size = ipc::detail::max<std::size_t>(BlockSize, sizeof(void*))
-    };
-
-public:
-    explicit fixed_alloc(std::size_t init_expand)
-        : base_t(block_size, init_expand) {
-    }
-
-    fixed_alloc() : fixed_alloc(1) {}
-
-    fixed_alloc(fixed_alloc && rhs)
-        : base_t(std::move(rhs)) {
-    }
-
-    fixed_alloc& operator=(fixed_alloc rhs) {
-        swap(rhs);
-        return (*this);
-    }
-
-    void swap(fixed_alloc& rhs) {
-        base_t::swap(rhs);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Variable-size blocks allocation (without alignment)
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-class variable_alloc_base {
-protected:
-    byte_t * head_ = nullptr, * tail_ = nullptr;
-
-public:
-    void swap(variable_alloc_base & rhs) {
-        std::swap(head_, rhs.head_);
-        std::swap(tail_, rhs.tail_);
-    }
-
-    std::size_t remain() const noexcept {
-        return static_cast<std::size_t>(tail_ - head_);
-    }
-
-    bool empty() const noexcept {
-        return remain() == 0;
-    }
-
-    void take(variable_alloc_base && rhs) {
-        if (remain() < rhs.remain()) {
-            // replace this by rhs
-            head_ = rhs.head_;
-            tail_ = rhs.tail_;
-        }
-        // discard rhs
-        rhs.head_ = rhs.tail_ = nullptr;
-    }
-
-    void free(void* /*p*/) {}
-    void free(void* /*p*/, std::size_t) {}
-};
-
-} // namespace detail
-
-template <std::size_t ChunkSize = (sizeof(void*) * 1024), typename AllocP = scope_alloc<>>
-class variable_alloc : public detail::variable_alloc_base {
-public:
-    using base_t       = detail::variable_alloc_base;
-    using alloc_policy = AllocP;
-
-    enum : std::size_t {
-        aligned_chunk_size = detail::aligned(ChunkSize, alignof(std::max_align_t))
-    };
-
-private:
-    alloc_policy alloc_;
-
-public:
-    variable_alloc() = default;
-
-    variable_alloc(variable_alloc && rhs)         { swap(rhs); }
-    variable_alloc& operator=(variable_alloc rhs) { swap(rhs); return (*this); }
-
-    void swap(variable_alloc& rhs) {
-        alloc_.swap(rhs.alloc_);
-        base_t::swap(rhs);
-    }
-
-    template <typename A = AllocP>
-    auto take(variable_alloc && rhs) -> ipc::require<detail::has_take<A>::value> {
-        base_t::take(std::move(rhs));
-        alloc_.take(std::move(rhs.alloc_));
-    }
-
-    void* alloc(std::size_t size) {
-        /*
-         * byte alignment is always alignof(std::max_align_t).
-        */
-        size = detail::aligned(size, alignof(std::max_align_t));
-        void* ptr;
-        // size would never be 0 here
-        if (remain() < size) {
-            std::size_t chunk_size = ipc::detail::max<std::size_t>(aligned_chunk_size, size);
-            ptr   = alloc_.alloc(chunk_size);
-            tail_ = static_cast<byte_t*>(ptr) + chunk_size;
-            head_ = tail_ - (chunk_size - size);
-        }
-        else {
-            ptr   = head_;
-            head_ += size;
-        }
-        return ptr;
-    }
-};
-
-} // namespace mem
-} // namespace ipc
diff --git a/src/libipc/memory/allocator_wrapper.h b/src/libipc/memory/allocator_wrapper.h
deleted file mode 100755
index d1c3ea36..00000000
--- a/src/libipc/memory/allocator_wrapper.h
+++ /dev/null
@@ -1,121 +0,0 @@
-#pragma once
-
-#include <limits>   // std::numeric_limits
-#include <utility>  // std::forward
-#include <cstddef>
-
-#include "libipc/pool_alloc.h"
-
-namespace ipc {
-namespace mem {
-
-////////////////////////////////////////////////////////////////
-/// The allocator wrapper class for STL
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-template <typename T, typename AllocP>
-struct rebind {
-    template <typename U>
-    using alloc_t = AllocP;
-};
-
-template <typename T, template <typename> class AllocT>
-struct rebind<T, AllocT<T>> {
-    template <typename U>
-    using alloc_t = AllocT<U>;
-};
-
-} // namespace detail
-
-template <typename T, typename AllocP>
-class allocator_wrapper {
-
-    template <typename U, typename AllocU>
-    friend class allocator_wrapper;
-
-public:
-    // type definitions
-    typedef T                 value_type;
-    typedef value_type*       pointer;
-    typedef const value_type* const_pointer;
-    typedef value_type&       reference;
-    typedef const value_type& const_reference;
-    typedef std::size_t       size_type;
-    typedef std::ptrdiff_t    difference_type;
-    typedef AllocP            alloc_policy;
-
-private:
-    alloc_policy alloc_;
-
-public:
-    allocator_wrapper() noexcept {}
-
-    // construct by copying (do nothing)
-    allocator_wrapper           (const allocator_wrapper<T, AllocP>&) noexcept {}
-    allocator_wrapper& operator=(const allocator_wrapper<T, AllocP>&) noexcept { return *this; }
-	
-    // construct from a related allocator (do nothing)
-    template <typename U, typename AllocU> allocator_wrapper           (const allocator_wrapper<U, AllocU>&) noexcept {}
-    template <typename U, typename AllocU> allocator_wrapper& operator=(const allocator_wrapper<U, AllocU>&) noexcept { return *this; }
-
-    allocator_wrapper           (allocator_wrapper && rhs) noexcept : alloc_ ( std::move(rhs.alloc_) ) {}
-    allocator_wrapper& operator=(allocator_wrapper && rhs) noexcept { alloc_ = std::move(rhs.alloc_); return *this; }
-
-public:
-    // the other type of std_allocator
-    template <typename U>
-    struct rebind { 
-        using other = allocator_wrapper< U, typename detail::rebind<T, AllocP>::template alloc_t<U> >;
-    };
-
-    constexpr size_type max_size(void) const noexcept {
-        return (std::numeric_limits<size_type>::max)() / sizeof(value_type);
-    }
-
-public:
-    pointer allocate(size_type count) noexcept {
-        if (count == 0) return nullptr;
-        if (count > this->max_size()) return nullptr;
-        return static_cast<pointer>(alloc_.alloc(count * sizeof(value_type)));
-    }
-
-    void deallocate(pointer p, size_type count) noexcept {
-        alloc_.free(p, count * sizeof(value_type));
-    }
-
-    template <typename... P>
-    static void construct(pointer p, P && ... params) {
-        ipc::mem::construct(p, std::forward<P>(params)...);
-    }
-
-    static void destroy(pointer p) {
-        ipc::mem::destruct(p);
-    }
-};
-
-template <class AllocP>
-class allocator_wrapper<void, AllocP> {
-public:
-    // type definitions
-    typedef void              value_type;
-    typedef value_type*       pointer;
-    typedef const value_type* const_pointer;
-    typedef std::size_t       size_type;
-    typedef std::ptrdiff_t    difference_type;
-    typedef AllocP            alloc_policy;
-};
-
-template <typename T, typename U, class AllocP>
-constexpr bool operator==(const allocator_wrapper<T, AllocP>&, const allocator_wrapper<U, AllocP>&) noexcept {
-    return true;
-}
-
-template <typename T, typename U, class AllocP>
-constexpr bool operator!=(const allocator_wrapper<T, AllocP>&, const allocator_wrapper<U, AllocP>&) noexcept {
-    return false;
-}
-
-} // namespace mem
-} // namespace ipc
diff --git a/src/libipc/memory/resource.h b/src/libipc/memory/resource.h
deleted file mode 100755
index 38b6fb68..00000000
--- a/src/libipc/memory/resource.h
+++ /dev/null
@@ -1,90 +0,0 @@
-#pragma once
-
-#include <type_traits>
-#include <limits>
-#include <utility>
-#include <functional>
-#include <unordered_map>
-#include <map>
-#include <string>
-#include <cstdio>
-
-#include "libipc/def.h"
-
-#include "libipc/memory/alloc.h"
-#include "libipc/memory/wrapper.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace mem {
-
-//using async_pool_alloc = static_wrapper<variable_wrapper<async_wrapper<
-//    detail::fixed_alloc<
-//        variable_alloc                           <sizeof(void*) * 1024 * 256>, 
-//        fixed_expand_policy<sizeof(void*) * 1024, sizeof(void*) * 1024 * 256>
-//    >, 
-//    default_recycler >>>;
-using async_pool_alloc = ipc::mem::static_alloc;
-
-template <typename T>
-using allocator = allocator_wrapper<T, async_pool_alloc>;
-
-} // namespace mem
-
-namespace {
-
-constexpr char const * pf(int)                { return "%d"  ; }
-constexpr char const * pf(long)               { return "%ld" ; }
-constexpr char const * pf(long long)          { return "%lld"; }
-constexpr char const * pf(unsigned int)       { return "%u"  ; }
-constexpr char const * pf(unsigned long)      { return "%lu" ; }
-constexpr char const * pf(unsigned long long) { return "%llu"; }
-constexpr char const * pf(float)              { return "%f"  ; }
-constexpr char const * pf(double)             { return "%f"  ; }
-constexpr char const * pf(long double)        { return "%Lf" ; }
-
-} // internal-linkage
-
-template <typename T>
-struct hash : public std::hash<T> {};
-
-template <typename Key, typename T>
-using unordered_map = std::unordered_map<
-    Key, T, ipc::hash<Key>, std::equal_to<Key>, ipc::mem::allocator<std::pair<Key const, T>>
->;
-
-template <typename Key, typename T>
-using map = std::map<
-    Key, T, std::less<Key>, ipc::mem::allocator<std::pair<Key const, T>>
->;
-
-template <typename Char>
-using basic_string = std::basic_string<
-    Char, std::char_traits<Char>, ipc::mem::allocator<Char>
->;
-
-using string  = basic_string<char>;
-using wstring = basic_string<wchar_t>;
-
-template <> struct hash<string> {
-    std::size_t operator()(string const &val) const noexcept {
-        return std::hash<char const *>{}(val.c_str());
-    }
-};
-
-template <> struct hash<wstring> {
-    std::size_t operator()(wstring const &val) const noexcept {
-        return std::hash<wchar_t const *>{}(val.c_str());
-    }
-};
-
-template <typename T>
-ipc::string to_string(T val) {
-    char buf[std::numeric_limits<T>::digits10 + 1] {};
-    if (std::snprintf(buf, sizeof(buf), pf(val), val) > 0) {
-        return buf;
-    }
-    return {};
-}
-
-} // namespace ipc
diff --git a/src/libipc/memory/wrapper.h b/src/libipc/memory/wrapper.h
deleted file mode 100755
index b0b7c588..00000000
--- a/src/libipc/memory/wrapper.h
+++ /dev/null
@@ -1,327 +0,0 @@
-#pragma once
-
-#include <tuple>
-#include <thread>
-#include <deque>        // std::deque
-#include <functional>   // std::function
-#include <utility>      // std::forward
-#include <cstddef>
-#include <cassert>      // assert
-#include <type_traits>  // std::aligned_storage_t
-
-#include "libipc/def.h"
-#include "libipc/rw_lock.h"
-#include "libipc/pool_alloc.h"
-
-#include "libipc/utility/concept.h"
-#include "libipc/memory/alloc.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace mem {
-
-////////////////////////////////////////////////////////////////
-/// Thread-safe allocation wrapper
-////////////////////////////////////////////////////////////////
-
-namespace detail {
-
-IPC_CONCEPT_(is_comparable, operator<(std::declval<Type>()));
-
-} // namespace detail
-
-template <typename AllocP, bool = detail::is_comparable<AllocP>::value>
-class limited_recycler;
-
-template <typename AllocP>
-class limited_recycler<AllocP, true> {
-public:
-    using alloc_policy = AllocP;
-
-protected:
-    std::deque<alloc_policy> master_allocs_;
-    ipc::spin_lock master_lock_;
-
-    template <typename F>
-    void take_first_do(F && pred) {
-        auto it = master_allocs_.begin();
-        pred(const_cast<alloc_policy&>(*it));
-        master_allocs_.erase(it);
-    }
-
-public:
-    void try_recover(alloc_policy & alc) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(master_lock_);
-        if (master_allocs_.empty()) return;
-        take_first_do([&alc](alloc_policy & first) { alc.swap(first); });
-    }
-
-    void collect(alloc_policy && alc) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(master_lock_);
-        if (master_allocs_.size() >= 32) {
-            take_first_do([](alloc_policy &) {}); // erase first
-        }
-        master_allocs_.emplace_back(std::move(alc));
-    }
-
-    IPC_CONSTEXPR_ auto try_replenish(alloc_policy&, std::size_t) noexcept {}
-};
-
-template <typename AllocP>
-class default_recycler : public limited_recycler<AllocP> {
-
-    IPC_CONCEPT_(has_remain, remain());
-    IPC_CONCEPT_(has_empty , empty());
-
-    template <typename A>
-    void try_fill(A & alc) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(this->master_lock_);
-        if (this->master_allocs_.empty()) return;
-        this->take_first_do([&alc](alloc_policy & first) { alc.take(std::move(first)); });
-    }
-
-public:
-    using alloc_policy = typename limited_recycler<AllocP>::alloc_policy;
-
-    template <typename A = AllocP>
-    auto try_replenish(alloc_policy & alc, std::size_t size)
-        -> ipc::require<detail::has_take<A>::value && has_remain<A>::value> {
-        if (alc.remain() >= size) return;
-        this->try_fill(alc);
-    }
-
-    template <typename A = AllocP>
-    auto try_replenish(alloc_policy & alc, std::size_t /*size*/)
-        -> ipc::require<detail::has_take<A>::value && !has_remain<A>::value && has_empty<A>::value> {
-        if (!alc.empty()) return;
-        this->try_fill(alc);
-    }
-
-    template <typename A = AllocP>
-    auto try_replenish(alloc_policy & alc, std::size_t /*size*/)
-        -> ipc::require<!detail::has_take<A>::value && has_empty<A>::value> {
-        if (!alc.empty()) return;
-        this->try_recover(alc);
-    }
-
-    template <typename A = AllocP>
-    IPC_CONSTEXPR_ auto try_replenish(alloc_policy & /*alc*/, std::size_t /*size*/) noexcept
-        -> ipc::require<(!detail::has_take<A>::value || !has_remain<A>::value) && !has_empty<A>::value> {
-        // Do Nothing.
-    }
-};
-
-template <typename AllocP>
-class empty_recycler {
-public:
-    using alloc_policy = AllocP;
-
-    IPC_CONSTEXPR_ void try_recover(alloc_policy&)                noexcept {}
-    IPC_CONSTEXPR_ auto try_replenish(alloc_policy&, std::size_t) noexcept {}
-    IPC_CONSTEXPR_ void collect(alloc_policy&&)                   noexcept {}
-};
-
-template <typename AllocP,
-          template <typename> class RecyclerP = default_recycler>
-class async_wrapper {
-public:
-    using alloc_policy = AllocP;
-
-private:
-    RecyclerP<alloc_policy> recycler_;
-
-    class alloc_proxy : public AllocP {
-        async_wrapper * w_ = nullptr;
-
-    public:
-        alloc_proxy(alloc_proxy && rhs) = default;
-
-        template <typename ... P>
-        alloc_proxy(async_wrapper* w, P && ... pars)
-            : AllocP(std::forward<P>(pars) ...), w_(w) {
-            assert(w_ != nullptr);
-            w_->recycler_.try_recover(*this);
-        }
-
-        ~alloc_proxy() {
-            w_->recycler_.collect(std::move(*this));
-        }
-
-        auto alloc(std::size_t size) {
-            w_->recycler_.try_replenish(*this, size);
-            return AllocP::alloc(size);
-        }
-    };
-
-    friend class alloc_proxy;
-    using ref_t = alloc_proxy&;
-
-    std::function<ref_t()> get_alloc_;
-
-public:
-    template <typename ... P>
-    async_wrapper(P ... pars) {
-        get_alloc_ = [this, pars ...]()->ref_t {
-            thread_local alloc_proxy tls(pars ...);
-            return tls;
-        };
-    }
-
-    void* alloc(std::size_t size) {
-        return get_alloc_().alloc(size);
-    }
-
-    void free(void* p, std::size_t size) {
-        get_alloc_().free(p, size);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Thread-safe allocation wrapper (with spin_lock)
-////////////////////////////////////////////////////////////////
-
-template <typename AllocP, typename MutexT = ipc::spin_lock>
-class sync_wrapper {
-public:
-    using alloc_policy = AllocP;
-    using mutex_type   = MutexT;
-
-private:
-    mutex_type   lock_;
-    alloc_policy alloc_;
-
-public:
-    template <typename ... P>
-    sync_wrapper(P && ... pars)
-        : alloc_(std::forward<P>(pars) ...)
-    {}
-
-    void swap(sync_wrapper& rhs) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
-        alloc_.swap(rhs.alloc_);
-    }
-
-    void* alloc(std::size_t size) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
-        return alloc_.alloc(size);
-    }
-
-    void free(void* p, std::size_t size) {
-        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
-        alloc_.free(p, size);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Variable memory allocation wrapper
-////////////////////////////////////////////////////////////////
-
-template <std::size_t BaseSize = 0, std::size_t IterSize = sizeof(void*)>
-struct default_mapping_policy {
-
-    enum : std::size_t {
-        base_size    = BaseSize,
-        iter_size    = IterSize,
-        classes_size = 64
-    };
-
-    template <typename F, typename ... P>
-    IPC_CONSTEXPR_ static void foreach(F && f, P && ... params) {
-        for (std::size_t i = 0; i < classes_size; ++i) {
-            f(i, std::forward<P>(params)...);
-        }
-    }
-
-    IPC_CONSTEXPR_ static std::size_t block_size(std::size_t id) noexcept {
-        return (id < classes_size) ? (base_size + (id + 1) * iter_size) : 0;
-    }
-
-    template <typename F, typename D, typename ... P>
-    IPC_CONSTEXPR_ static auto classify(F && f, D && d, std::size_t size, P && ... params) {
-        std::size_t id = (size - base_size - 1) / iter_size;
-        return (id < classes_size) ? 
-            f(id, size, std::forward<P>(params)...) : 
-            d(size, std::forward<P>(params)...);
-    }
-};
-
-template <typename FixedAlloc,
-          typename DefaultAlloc = mem::static_alloc,
-          typename MappingP     = default_mapping_policy<>>
-class variable_wrapper {
-
-    struct initiator {
-
-        using falc_t = std::aligned_storage_t<sizeof(FixedAlloc), alignof(FixedAlloc)>;
-        falc_t arr_[MappingP::classes_size];
-
-        initiator() {
-            MappingP::foreach([](std::size_t id, falc_t * a) {
-                ipc::mem::construct(&initiator::at(a, id), MappingP::block_size(id));
-            }, arr_);
-        }
-
-        ~initiator() {
-            MappingP::foreach([](std::size_t id, falc_t * a) {
-                ipc::mem::destruct(&initiator::at(a, id));
-            }, arr_);
-        }
-
-        static FixedAlloc & at(falc_t * arr, std::size_t id) noexcept {
-            return reinterpret_cast<FixedAlloc&>(arr[id]);
-        }
-    } init_;
-
-    using falc_t = typename initiator::falc_t;
-
-public:
-    void swap(variable_wrapper & other) {
-        MappingP::foreach([](std::size_t id, falc_t * in, falc_t * ot) {
-            initiator::at(in, id).swap(initiator::at(ot, id));
-        }, init_.arr_, other.init_.arr_);
-    }
-
-    void* alloc(std::size_t size) {
-        return MappingP::classify([](std::size_t id, std::size_t size, falc_t * a) {
-            return initiator::at(a, id).alloc(size);
-        }, [](std::size_t size, falc_t *) {
-            return DefaultAlloc::alloc(size);
-        }, size, init_.arr_);
-    }
-
-    void free(void* p, std::size_t size) {
-        MappingP::classify([](std::size_t id, std::size_t size, void* p, falc_t * a) {
-            initiator::at(a, id).free(p, size);
-        }, [](std::size_t size, void* p, falc_t *) {
-            DefaultAlloc::free(p, size);
-        }, size, p, init_.arr_);
-    }
-};
-
-////////////////////////////////////////////////////////////////
-/// Static allocation wrapper
-////////////////////////////////////////////////////////////////
-
-template <typename AllocP>
-class static_wrapper {
-public:
-    using alloc_policy = AllocP;
-
-    static alloc_policy& instance() {
-        static alloc_policy alloc;
-        return alloc;
-    }
-
-    static void swap(static_wrapper&) {}
-
-    static void* alloc(std::size_t size) {
-        return instance().alloc(size);
-    }
-
-    static void free(void* p, std::size_t size) {
-        instance().free(p, size);
-    }
-};
-
-} // namespace mem
-} // namespace ipc
diff --git a/src/libipc/mutex.cpp b/src/libipc/mutex.cpp
new file mode 100644
index 00000000..71ad9f0d
--- /dev/null
+++ b/src/libipc/mutex.cpp
@@ -0,0 +1,18 @@
+
+#include "libimp/log.h"
+
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+# include "libipc/platform/win/mutex_impl.h"
+#else
+#endif
+
+#if !defined(LIBIMP_OS_LINUX)
+LIBIPC_NAMESPACE_BEG_
+
+/// \brief C style mutex access interface implementation.
+
+/// \brief The mutex object.
+
+LIBIPC_NAMESPACE_END_
+#endif
diff --git a/src/libipc/platform/detail.h b/src/libipc/platform/detail.h
deleted file mode 100755
index e93c1d29..00000000
--- a/src/libipc/platform/detail.h
+++ /dev/null
@@ -1,136 +0,0 @@
-#ifndef LIBIPC_SRC_PLATFORM_DETAIL_H_
-#define LIBIPC_SRC_PLATFORM_DETAIL_H_
-
-// detect platform
-
-#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-    defined(WINCE) || defined(_WIN32_WCE)
-#   define IPC_OS_WINDOWS_
-#elif defined(__linux__) || defined(__linux)
-#   define IPC_OS_LINUX_
-#elif defined(__QNX__)
-#   define IPC_OS_QNX_
-#elif defined(__APPLE__)
-#elif defined(__ANDROID__)
-// TBD
-#endif
-
-#if defined(__cplusplus)
-
-#include <memory>
-#include <mutex>
-#include <shared_mutex>
-#include <type_traits>
-#include <tuple>
-#include <algorithm>
-
-// pre-defined
-
-#ifdef IPC_UNUSED_
-#   error "IPC_UNUSED_ has been defined."
-#endif
-#ifdef IPC_FALLTHROUGH_
-#   error "IPC_FALLTHROUGH_ has been defined."
-#endif
-#ifdef IPC_STBIND_
-#   error "IPC_STBIND_ has been defined."
-#endif
-#ifdef IPC_CONSTEXPR_
-#   error "IPC_CONSTEXPR_ has been defined."
-#endif
-
-#if __cplusplus >= 201703L
-
-#define IPC_UNUSED_      [[maybe_unused]]
-#define IPC_FALLTHROUGH_ [[fallthrough]]
-#define IPC_STBIND_(A, B, ...) auto [A, B] = __VA_ARGS__
-#define IPC_CONSTEXPR_   constexpr
-
-#else /*__cplusplus < 201703L*/
-
-#if defined(_MSC_VER)
-#   define IPC_UNUSED_ __pragma(warning(suppress: 4100 4101 4189))
-#elif defined(__GNUC__)
-#   define IPC_UNUSED_ __attribute__((__unused__))
-#else
-#   define IPC_UNUSED_
-#endif
-
-#define IPC_FALLTHROUGH_
-
-#define IPC_STBIND_(A, B, ...)       \
-    auto tp___ = __VA_ARGS__         \
-    auto A     = std::get<0>(tp___); \
-    auto B     = std::get<1>(tp___)
-
-#define IPC_CONSTEXPR_ inline
-
-#endif/*__cplusplus < 201703L*/
-
-#if __cplusplus >= 201703L
-
-namespace std {
-
-// deduction guides for std::unique_ptr
-template <typename T>
-unique_ptr(T* p) -> unique_ptr<T>;
-template <typename T, typename D>
-unique_ptr(T* p, D&& d) -> unique_ptr<T, std::decay_t<D>>;
-
-} // namespace std
-
-namespace ipc {
-namespace detail {
-
-using std::unique_ptr;
-using std::unique_lock;
-using std::shared_lock;
-using std::max;
-using std::min;
-
-#else /*__cplusplus < 201703L*/
-
-namespace ipc {
-namespace detail {
-
-// deduction guides for std::unique_ptr
-template <typename T>
-constexpr auto unique_ptr(T* p) noexcept {
-    return std::unique_ptr<T> { p };
-}
-
-template <typename T, typename D>
-constexpr auto unique_ptr(T* p, D&& d) noexcept {
-    return std::unique_ptr<T, std::decay_t<D>> { p, std::forward<D>(d) };
-}
-
-// deduction guides for std::unique_lock
-template <typename T>
-constexpr auto unique_lock(T&& lc) noexcept {
-    return std::unique_lock<std::decay_t<T>> { std::forward<T>(lc) };
-}
-
-// deduction guides for std::shared_lock
-template <typename T>
-constexpr auto shared_lock(T&& lc) noexcept {
-    return std::shared_lock<std::decay_t<T>> { std::forward<T>(lc) };
-}
-
-template <typename T>
-constexpr const T& (max)(const T& a, const T& b) {
-    return (a < b) ? b : a;
-}
-
-template <typename T>
-constexpr const T& (min)(const T& a, const T& b) {
-    return (b < a) ? b : a;
-}
-
-#endif/*__cplusplus < 201703L*/
-
-} // namespace detail
-} // namespace ipc
-
-#endif // defined(__cplusplus)
-#endif // LIBIPC_SRC_PLATFORM_DETAIL_H_
\ No newline at end of file
diff --git a/src/libipc/platform/linux/a0/LICENSE b/src/libipc/platform/linux/a0/LICENSE
deleted file mode 100644
index cf1ab25d..00000000
--- a/src/libipc/platform/linux/a0/LICENSE
+++ /dev/null
@@ -1,24 +0,0 @@
-This is free and unencumbered software released into the public domain.
-
-Anyone is free to copy, modify, publish, use, compile, sell, or
-distribute this software, either in source code form or as a compiled
-binary, for any purpose, commercial or non-commercial, and by any
-means.
-
-In jurisdictions that recognize copyright laws, the author or authors
-of this software dedicate any and all copyright interest in the
-software to the public domain. We make this dedication for the benefit
-of the public at large and to the detriment of our heirs and
-successors. We intend this dedication to be an overt act of
-relinquishment in perpetuity of all present and future rights to this
-software under copyright law.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
-OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
-ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-OTHER DEALINGS IN THE SOFTWARE.
-
-For more information, please refer to <http://unlicense.org>
diff --git a/src/libipc/platform/linux/a0/README.md b/src/libipc/platform/linux/a0/README.md
deleted file mode 100644
index 8aed9d7c..00000000
--- a/src/libipc/platform/linux/a0/README.md
+++ /dev/null
@@ -1,213 +0,0 @@
-<h1 align="center">
-  <br>
-  <img src="https://raw.githubusercontent.com/alephzero/logo/master/rendered/alephzero.svg" width="256px">
-  <br>
-  AlephZero
-</h1>
-
-<h3 align="center">Simple, Robust, Fast IPC.</h3>
-
-<p align="center">
-  <a href="https://github.com/alephzero/alephzero/actions?query=workflow%3ACI"><img src="https://github.com/alephzero/alephzero/workflows/CI/badge.svg"></a>
-  <a href="https://codecov.io/gh/alephzero/alephzero"><img src="https://codecov.io/gh/alephzero/alephzero/branch/master/graph/badge.svg"></a>
-  <a href="https://alephzero.readthedocs.io/en/latest/?badge=latest"><img src="https://readthedocs.org/projects/alephzero/badge/?version=latest"></a>
-  <a href="http://unlicense.org"><img src="https://img.shields.io/badge/license-Unlicense-blue.svg"></a>
-</p>
-
-<p align="center">
-  <a href="#overview">Overview</a> •
-  <a href="#transport">Transport</a> •
-  <a href="#protocol">Protocol</a> •
-  <a href="#examples">Examples</a> •
-  <a href="#installation">Installation</a> •
-  <a href="#across-dockers">Across Dockers</a>
-</p>
-
-# Overview
-
-[Presentation from March 25, 2020](https://docs.google.com/presentation/d/12KE9UucjZPtpVnM1NljxOqBolBBKECWJdrCoE2yJaBw/edit#slide=id.p)
-
-AlephZero is a library for message based communication between programs running on the same machine.
-
-## Simple
-
-AlephZero's main goal is to be simple to use. Nothing is higher priority.
-
-There is no "master" process in between your nodes that is needed to do handshakes or exchanges of any kind. All you need is the topic name.
-
-See the <a href="#examples">Examples</a>.
-
-## Robust
-
-This is probably the main value of AlephZero, above similar libraries.
-
-AlephZero uses a lot of tricks to ensure the state of all channels is consistent, even when programs die. This includes double-buffering the state of the communication channel and [robustifying](https://man7.org/linux/man-pages/man3/pthread_mutexattr_setrobust.3.html) the locks and notification channels.
-
-## Fast
-
-AlephZero uses shared memory across multiple processes to read and write messages, minimizing the involvement of the kernel. The kernel only really gets involved in notifying a process that a new message exists, and for that we use futex (fast user-space mutex).
-
-TODO: Benchmarks
-
-# Transport
-
-AlephZero, at its core, is a simple allocator on top of a contiguous region of memory. Usually, shared-memory. The allocator of choice is a circular-linked-list, which is fast, simple, and sufficient for the protocol listed below. It also plays well with the robustness requirement.
-
-This has a number of implications. For one, this means that old messages are kept around until the space is needed. The oldest messages are always discarded before any more recent messages.
-
-# Protocol
-
-Rather than exposing the low-level transport directly, AlephZero provides a few higher level protocol:
-
-* <b>PubSub</b>: Broadcast published messages. Subscribers get notified.
-* <b>RPC</b>: Request-response.
-* <b>PRPC (Progressive RPC)</b>: Request-streaming response.
-* <b>Sessions</b>: Bi-directional channel of communication. Not yet implemented. Let me know if you want this.
-
-# Examples
-
-Many more example and an interactive experience can be found at: https://github.com/alephzero/playground
-
-For the curious, here are some simple snippets to get you started:
-
-To begin with, we need to include AlephZero:
-```cc
-#include <a0.h>
-```
-
-## PubSub
-
-You can have as many publisher and subscribers on the same topic as you wish. They just need to agree on the filename.
-
-```cc
-a0::Publisher p("my_pubsub_topic");
-p.pub("foo");
-```
-
-You just published `"foo"` to the `"my_pubsub_topic"`.
-
-To read those message, you can create a subscriber on the same topic:
-```cc
-a0::Subscriber sub(
-    "my_pubsub_topic",
-    A0_INIT_AWAIT_NEW,  // or MOST_RECENT or OLDEST
-    A0_ITER_NEWEST,     // or NEXT
-    [](a0::PacketView pkt_view) {
-      std::cout << "Got: " << pkt_view.payload() << std::endl;
-    });
-```
-The callback will trigger whenever a message is published.
-
-The `Subscriber` object spawns a thread that will read the topic and call the callback.
-
-The `A0_INIT` tells the subscriber where to start reading. 
-* `A0_INIT_AWAIT_NEW`: Start with messages published after the creation of the subscriber.
-* `A0_INIT_MOST_RECENT`: Start with the most recently published message. Useful for state and configuration. But be careful, this can be quite old!
-* `A0_INIT_OLDEST`: Topics keep a history of 16MB (unless configures otherwise). Start with the oldest thing still in there.
-
-The `A0_ITER` tells the subscriber how to continue reading messages. After each callback:
-* `A0_ITER_NEXT`: grab the sequentially next message. When you don't want to miss a thing.
-* `A0_ITER_NEWEST`: grab the newest available unread message. When you want to keep up with the firehose.
-
-```cc
-a0::SubscriberSync sub_sync(
-    "my_pubsub_topic",
-    A0_INIT_OLDEST, A0_ITER_NEXT);
-while (sub_sync.has_next()) {
-  auto pkt = sub_sync.next();
-  std::cout << "Got: " << pkt.payload() << std::endl;
-}
-```
-
-## RPC
-
-Create an `RpcServer`:
-
-```cc
-a0::RpcServer server(
-    "my_rpc_topic",
-    /* onrequest = */ [](a0::RpcRequest req) {
-        std::cout << "Got: " << req.pkt().payload() << std::endl;
-        req.reply("echo " + std::string(req.pkt().payload()));
-    },
-    /* oncancel = */ nullptr);
-```
-
-Create an `RpcClient`:
-
-```cc
-a0::RpcClient client("my_rpc_topic");
-client.send("client msg", [](a0::PacketView reply) {
-  std::cout << "Got: " << reply.payload() << std::endl;
-});
-```
-
-# Installation
-
-## Install From Source
-
-### Ubuntu Dependencies
-
-```sh
-apt install g++ make
-```
-
-### Alpine Dependencies
-
-```sh
-apk add g++ linux-headers make
-```
-
-### Download And Install
-
-```sh
-git clone https://github.com/alephzero/alephzero.git
-cd alephzero
-make install -j
-```
-
-## Install From Package
-
-Coming soon-ish. Let me know if you want this and I'll prioritize it. External support is much appreciated.
-
-## Integration
-
-### Command Line
-
-Add the following to g++ / clang commands.
-```sh
--L${libdir} -lalephzero -lpthread
-```
-
-### Package-cfg
-
-```sh
-pkg-config --cflags --libs alephzero
-```
-
-### CMake
-
-Coming soon-ish. Let me know if you want this and I'll prioritize it. External support is much appreciated.
-
-### Bazel
-
-Coming soon-ish. Let me know if you want this and I'll prioritize it.
-
-# Across Dockers
-
-For programs running across different dockers to be able to communicate, we need to have them match up on two flags: `--ipc` and `--pid`.
-
-* `--ipc` shares the `/dev/shm` filesystem. This is necessary to open the same file topics.
-* `--pid` shares the process id namespace. This is necessary for the locking and notification systems.
-
-In the simplest case, you can set them both to `host` and talk through the system's global `/dev/shm` and process id namespace.
-```sh
-docker run --ipc=host --pid=host --name=foo foo_image
-docker run --ipc=host --pid=host --name=bar bar_image
-```
-
-Or, you can mark one as `shareable` and have the others connect to it:
-```sh
-docker run --ipc=shareable --pid=shareable --name=foo foo_image
-docker run --ipc=container:foo --pid=container:foo --name=bar bar_image
-```
diff --git a/src/libipc/platform/linux/a0/atomic.h b/src/libipc/platform/linux/a0/atomic.h
deleted file mode 100644
index 09a26ffb..00000000
--- a/src/libipc/platform/linux/a0/atomic.h
+++ /dev/null
@@ -1,36 +0,0 @@
-#ifndef A0_SRC_ATOMIC_H
-#define A0_SRC_ATOMIC_H
-
-#include "a0/inline.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-A0_STATIC_INLINE
-void a0_barrier() {
-  // 'atomic_thread_fence' is not supported with ‘-fsanitize=thread’
-  __sync_synchronize();
-}
-
-#define a0_atomic_fetch_add(P, V) __atomic_fetch_add((P), (V), __ATOMIC_RELAXED)
-#define a0_atomic_add_fetch(P, V) __atomic_add_fetch((P), (V), __ATOMIC_RELAXED)
-
-#define a0_atomic_fetch_and(P, V) __atomic_fetch_and((P), (V), __ATOMIC_RELAXED)
-#define a0_atomic_and_fetch(P, V) __atomic_and_fetch((P), (V), __ATOMIC_RELAXED)
-
-#define a0_atomic_fetch_or(P, V) __atomic_fetch_or((P), (V), __ATOMIC_RELAXED)
-#define a0_atomic_or_fetch(P, V) __atomic_or_fetch((P), (V), __ATOMIC_RELAXED)
-
-#define a0_atomic_load(P) __atomic_load_n((P), __ATOMIC_RELAXED)
-#define a0_atomic_store(P, V) __atomic_store_n((P), (V), __ATOMIC_RELAXED)
-
-// TODO(lshamis): Switch from __sync to __atomic.
-#define a0_cas_val(P, OV, NV) __sync_val_compare_and_swap((P), (OV), (NV))
-#define a0_cas(P, OV, NV) __sync_bool_compare_and_swap((P), (OV), (NV))
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_SRC_ATOMIC_H
diff --git a/src/libipc/platform/linux/a0/clock.h b/src/libipc/platform/linux/a0/clock.h
deleted file mode 100644
index 7b2a88b2..00000000
--- a/src/libipc/platform/linux/a0/clock.h
+++ /dev/null
@@ -1,60 +0,0 @@
-#ifndef A0_SRC_CLOCK_H
-#define A0_SRC_CLOCK_H
-
-#include "a0/err.h"
-#include "a0/inline.h"
-
-#include <stdint.h>
-#include <time.h>
-
-#include "err_macro.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-static const int64_t NS_PER_SEC = 1e9;
-
-typedef struct timespec timespec_t;
-
-A0_STATIC_INLINE
-a0_err_t a0_clock_now(clockid_t clk, timespec_t* out) {
-  A0_RETURN_SYSERR_ON_MINUS_ONE(clock_gettime(clk, out));
-  return A0_OK;
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_clock_add(timespec_t ts, int64_t add_nsec, timespec_t* out) {
-  out->tv_sec = ts.tv_sec + add_nsec / NS_PER_SEC;
-  out->tv_nsec = ts.tv_nsec + add_nsec % NS_PER_SEC;
-  if (out->tv_nsec >= NS_PER_SEC) {
-    out->tv_sec++;
-    out->tv_nsec -= NS_PER_SEC;
-  } else if (out->tv_nsec < 0) {
-    out->tv_sec--;
-    out->tv_nsec += NS_PER_SEC;
-  }
-
-  return A0_OK;
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_clock_convert(
-    clockid_t orig_clk,
-    timespec_t orig_ts,
-    clockid_t target_clk,
-    timespec_t* target_ts) {
-  timespec_t orig_now;
-  A0_RETURN_ERR_ON_ERR(a0_clock_now(orig_clk, &orig_now));
-  timespec_t target_now;
-  A0_RETURN_ERR_ON_ERR(a0_clock_now(target_clk, &target_now));
-
-  int64_t add_nsec = (orig_ts.tv_sec - orig_now.tv_sec) * NS_PER_SEC + (orig_ts.tv_nsec - orig_now.tv_nsec);
-  return a0_clock_add(target_now, add_nsec, target_ts);
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_SRC_CLOCK_H
diff --git a/src/libipc/platform/linux/a0/empty.h b/src/libipc/platform/linux/a0/empty.h
deleted file mode 100644
index 69fef8a7..00000000
--- a/src/libipc/platform/linux/a0/empty.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef A0_EMPTY_H
-#define A0_EMPTY_H
-
-// Bah. Why is there no consistent way to zero initialize a struct?
-#ifdef __cplusplus
-#define A0_EMPTY \
-  {}
-#else
-#define A0_EMPTY \
-  { 0 }
-#endif
-
-#endif  // A0_EMPTY_H
diff --git a/src/libipc/platform/linux/a0/err.c b/src/libipc/platform/linux/a0/err.c
deleted file mode 100644
index a48b8585..00000000
--- a/src/libipc/platform/linux/a0/err.c
+++ /dev/null
@@ -1,50 +0,0 @@
-#include "a0/err.h"
-#include "a0/thread_local.h"
-
-#include <errno.h>
-#include <string.h>
-
-A0_THREAD_LOCAL int a0_err_syscode;
-A0_THREAD_LOCAL char a0_err_msg[1024];
-
-const char* a0_strerror(a0_err_t err) {
-  switch (err) {
-    case A0_OK: {
-      return strerror(0);
-    }
-    case A0_ERR_SYS: {
-      return strerror(a0_err_syscode);
-    }
-    case A0_ERR_CUSTOM_MSG: {
-      return a0_err_msg;
-    }
-    case A0_ERR_INVALID_ARG: {
-      return strerror(EINVAL);
-    }
-    case A0_ERR_RANGE: {
-      return "Index out of bounds";
-    }
-    case A0_ERR_AGAIN: {
-      return "Not available yet";
-    }
-    case A0_ERR_FRAME_LARGE: {
-      return "Frame size too large";
-    }
-    case A0_ERR_ITER_DONE: {
-      return "Done iterating";
-    }
-    case A0_ERR_NOT_FOUND: {
-      return "Not found";
-    }
-    case A0_ERR_BAD_PATH: {
-      return "Invalid path";
-    }
-    case A0_ERR_BAD_TOPIC: {
-      return "Invalid topic name";
-    }
-    default: {
-      break;
-    }
-  }
-  return "";
-}
diff --git a/src/libipc/platform/linux/a0/err.h b/src/libipc/platform/linux/a0/err.h
deleted file mode 100644
index 05b70079..00000000
--- a/src/libipc/platform/linux/a0/err.h
+++ /dev/null
@@ -1,33 +0,0 @@
-#ifndef A0_ERR_H
-#define A0_ERR_H
-
-#include "a0/thread_local.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef enum a0_err_e {
-  A0_OK = 0,
-  A0_ERR_SYS = 1,
-  A0_ERR_CUSTOM_MSG = 2,
-  A0_ERR_INVALID_ARG = 3,
-  A0_ERR_RANGE = 4,
-  A0_ERR_AGAIN = 5,
-  A0_ERR_ITER_DONE = 6,
-  A0_ERR_NOT_FOUND = 7,
-  A0_ERR_FRAME_LARGE = 8,
-  A0_ERR_BAD_PATH = 9,
-  A0_ERR_BAD_TOPIC = 10,
-} a0_err_t;
-
-extern A0_THREAD_LOCAL int a0_err_syscode;
-extern A0_THREAD_LOCAL char a0_err_msg[1024];
-
-const char* a0_strerror(a0_err_t);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_ERR_H
diff --git a/src/libipc/platform/linux/a0/err_macro.h b/src/libipc/platform/linux/a0/err_macro.h
deleted file mode 100644
index 6683efcd..00000000
--- a/src/libipc/platform/linux/a0/err_macro.h
+++ /dev/null
@@ -1,52 +0,0 @@
-#ifndef A0_SRC_ERR_MACRO_H
-#define A0_SRC_ERR_MACRO_H
-
-#include "a0/err.h"
-#include "a0/inline.h"
-
-#include <errno.h>
-#include <stdarg.h>
-#include <stdbool.h>
-#include <stdio.h>
-
-A0_STATIC_INLINE
-a0_err_t A0_MAKE_SYSERR(int syserr) {
-  a0_err_syscode = syserr;
-  return A0_ERR_SYS;
-}
-
-A0_STATIC_INLINE
-int A0_SYSERR(a0_err_t err) {
-  return err == A0_ERR_SYS ? a0_err_syscode : 0;
-}
-
-A0_STATIC_INLINE_RECURSIVE
-a0_err_t A0_MAKE_MSGERR(const char* fmt, ...) {
-  va_list args;
-  va_start(args, fmt);
-  if (fmt) {
-    vsnprintf(a0_err_msg, sizeof(a0_err_msg), fmt, args);  // NOLINT(clang-analyzer-valist.Uninitialized): https://bugs.llvm.org/show_bug.cgi?id=41311
-    va_end(args);
-    return A0_ERR_CUSTOM_MSG;
-  }
-  va_end(args);
-  return A0_OK;
-}
-
-#define A0_RETURN_SYSERR_ON_MINUS_ONE(X) \
-  do {                                   \
-    if ((X) == -1) {                     \
-      a0_err_syscode = errno;            \
-      return A0_ERR_SYS;                 \
-    }                                    \
-  } while (0)
-
-#define A0_RETURN_ERR_ON_ERR(X) \
-  do {                          \
-    a0_err_t _err = (X);        \
-    if (_err) {                 \
-      return _err;              \
-    }                           \
-  } while (0)
-
-#endif  // A0_SRC_ERR_MACRO_H
diff --git a/src/libipc/platform/linux/a0/ftx.h b/src/libipc/platform/linux/a0/ftx.h
deleted file mode 100644
index d0d4c3dc..00000000
--- a/src/libipc/platform/linux/a0/ftx.h
+++ /dev/null
@@ -1,111 +0,0 @@
-#ifndef A0_SRC_FTX_H
-#define A0_SRC_FTX_H
-
-#include "a0/err.h"
-#include "a0/inline.h"
-#include "a0/time.h"
-
-#include <limits.h>
-#include <linux/futex.h>
-#include <stdint.h>
-#include <syscall.h>
-#include <time.h>
-#include <unistd.h>
-
-#include "clock.h"
-#include "err_macro.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// FUTEX_WAIT and FUTEX_WAIT_REQUEUE_PI default to CLOCK_MONOTONIC,
-// but FUTEX_LOCK_PI always uses CLOCK_REALTIME.
-//
-// Until someone tells me otherwise, I assume this is bad decision making
-// and I will instead standardize all things on CLOCK_BOOTTIME.
-
-// Futex.
-// Operations rely on the address.
-// It should not be copied or moved.
-typedef uint32_t a0_ftx_t;
-
-A0_STATIC_INLINE
-a0_err_t a0_futex(a0_ftx_t* uaddr,
-                  int futex_op,
-                  int val,
-                  uintptr_t timeout_or_val2,
-                  a0_ftx_t* uaddr2,
-                  int val3) {
-  A0_RETURN_SYSERR_ON_MINUS_ONE(syscall(SYS_futex, uaddr, futex_op, val, timeout_or_val2, uaddr2, val3));
-  return A0_OK;
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_wait(a0_ftx_t* ftx, int confirm_val, const a0_time_mono_t* time_mono) {
-  if (!time_mono) {
-    return a0_futex(ftx, FUTEX_WAIT, confirm_val, 0, NULL, 0);
-  }
-
-  timespec_t ts_mono;
-  A0_RETURN_ERR_ON_ERR(a0_clock_convert(CLOCK_BOOTTIME, time_mono->ts, CLOCK_MONOTONIC, &ts_mono));
-  return a0_futex(ftx, FUTEX_WAIT, confirm_val, (uintptr_t)&ts_mono, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_wake(a0_ftx_t* ftx, int cnt) {
-  return a0_futex(ftx, FUTEX_WAKE, cnt, 0, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_signal(a0_ftx_t* ftx) {
-  return a0_ftx_wake(ftx, 1);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_broadcast(a0_ftx_t* ftx) {
-  return a0_ftx_wake(ftx, INT_MAX);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_lock_pi(a0_ftx_t* ftx, const a0_time_mono_t* time_mono) {
-  if (!time_mono) {
-    return a0_futex(ftx, FUTEX_LOCK_PI, 0, 0, NULL, 0);
-  }
-
-  timespec_t ts_wall;
-  A0_RETURN_ERR_ON_ERR(a0_clock_convert(CLOCK_BOOTTIME, time_mono->ts, CLOCK_REALTIME, &ts_wall));
-  return a0_futex(ftx, FUTEX_LOCK_PI, 0, (uintptr_t)&ts_wall, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_trylock_pi(a0_ftx_t* ftx) {
-  return a0_futex(ftx, FUTEX_TRYLOCK_PI, 0, 0, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_unlock_pi(a0_ftx_t* ftx) {
-  return a0_futex(ftx, FUTEX_UNLOCK_PI, 0, 0, NULL, 0);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_cmp_requeue_pi(a0_ftx_t* ftx, int confirm_val, a0_ftx_t* requeue_ftx, int max_requeue) {
-  return a0_futex(ftx, FUTEX_CMP_REQUEUE_PI, 1, max_requeue, requeue_ftx, confirm_val);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_ftx_wait_requeue_pi(a0_ftx_t* ftx, int confirm_val, const a0_time_mono_t* time_mono, a0_ftx_t* requeue_ftx) {
-  if (!time_mono) {
-    return a0_futex(ftx, FUTEX_WAIT_REQUEUE_PI, confirm_val, 0, requeue_ftx, 0);
-  }
-
-  timespec_t ts_mono;
-  A0_RETURN_ERR_ON_ERR(a0_clock_convert(CLOCK_BOOTTIME, time_mono->ts, CLOCK_MONOTONIC, &ts_mono));
-  return a0_futex(ftx, FUTEX_WAIT_REQUEUE_PI, confirm_val, (uintptr_t)&ts_mono, requeue_ftx, 0);
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_SRC_FTX_H
diff --git a/src/libipc/platform/linux/a0/inline.h b/src/libipc/platform/linux/a0/inline.h
deleted file mode 100644
index a605540a..00000000
--- a/src/libipc/platform/linux/a0/inline.h
+++ /dev/null
@@ -1,8 +0,0 @@
-#ifndef A0_INLINE_H
-#define A0_INLINE_H
-
-#define A0_STATIC_INLINE static inline __attribute__((always_inline))
-
-#define A0_STATIC_INLINE_RECURSIVE static inline
-
-#endif  // A0_INLINE_H
diff --git a/src/libipc/platform/linux/a0/mtx.c b/src/libipc/platform/linux/a0/mtx.c
deleted file mode 100644
index 00022b64..00000000
--- a/src/libipc/platform/linux/a0/mtx.c
+++ /dev/null
@@ -1,420 +0,0 @@
-#include "a0/err.h"
-#include "a0/inline.h"
-#include "a0/mtx.h"
-#include "a0/thread_local.h"
-#include "a0/tid.h"
-#include "a0/time.h"
-
-#include <errno.h>
-#include <limits.h>
-#include <linux/futex.h>
-#include <pthread.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <syscall.h>
-#include <time.h>
-#include <unistd.h>
-
-#include "atomic.h"
-#include "clock.h"
-#include "err_macro.h"
-#include "ftx.h"
-
-// TSAN is worth the pain of properly annotating our mutex.
-
-// clang-format off
-#if defined(__SANITIZE_THREAD__)
-  #define A0_TSAN_ENABLED
-#elif defined(__has_feature)
-  #if __has_feature(thread_sanitizer)
-    #define A0_TSAN_ENABLED
-  #endif
-#endif
-// clang-format on
-
-const unsigned __tsan_mutex_linker_init = 1 << 0;
-const unsigned __tsan_mutex_write_reentrant = 1 << 1;
-const unsigned __tsan_mutex_read_reentrant = 1 << 2;
-const unsigned __tsan_mutex_not_static = 1 << 8;
-const unsigned __tsan_mutex_read_lock = 1 << 3;
-const unsigned __tsan_mutex_try_lock = 1 << 4;
-const unsigned __tsan_mutex_try_lock_failed = 1 << 5;
-const unsigned __tsan_mutex_recursive_lock = 1 << 6;
-const unsigned __tsan_mutex_recursive_unlock = 1 << 7;
-
-#ifdef A0_TSAN_ENABLED
-
-void __tsan_mutex_create(void* addr, unsigned flags);
-void __tsan_mutex_destroy(void* addr, unsigned flags);
-void __tsan_mutex_pre_lock(void* addr, unsigned flags);
-void __tsan_mutex_post_lock(void* addr, unsigned flags, int recursion);
-int __tsan_mutex_pre_unlock(void* addr, unsigned flags);
-void __tsan_mutex_post_unlock(void* addr, unsigned flags);
-void __tsan_mutex_pre_signal(void* addr, unsigned flags);
-void __tsan_mutex_post_signal(void* addr, unsigned flags);
-void __tsan_mutex_pre_divert(void* addr, unsigned flags);
-void __tsan_mutex_post_divert(void* addr, unsigned flags);
-
-#else
-
-#define _u_ __attribute__((unused))
-
-A0_STATIC_INLINE void _u_ __tsan_mutex_create(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_destroy(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_pre_lock(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_post_lock(_u_ void* addr,
-                                                 _u_ unsigned flags,
-                                                 _u_ int recursion) {}
-A0_STATIC_INLINE int _u_ __tsan_mutex_pre_unlock(_u_ void* addr, _u_ unsigned flags) {
-  return 0;
-}
-A0_STATIC_INLINE void _u_ __tsan_mutex_post_unlock(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_pre_signal(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_post_signal(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_pre_divert(_u_ void* addr, _u_ unsigned flags) {}
-A0_STATIC_INLINE void _u_ __tsan_mutex_post_divert(_u_ void* addr, _u_ unsigned flags) {}
-
-#endif
-
-A0_THREAD_LOCAL bool a0_robust_init = false;
-
-A0_STATIC_INLINE
-void a0_robust_reset() {
-  a0_robust_init = 0;
-}
-
-A0_STATIC_INLINE
-void a0_robust_reset_atfork() {
-  pthread_atfork(NULL, NULL, &a0_robust_reset);
-}
-
-static pthread_once_t a0_robust_reset_atfork_once;
-
-typedef struct robust_list robust_list_t;
-typedef struct robust_list_head robust_list_head_t;
-
-A0_THREAD_LOCAL robust_list_head_t a0_robust_head;
-
-A0_STATIC_INLINE
-void robust_init() {
-  a0_robust_head.list.next = &a0_robust_head.list;
-  a0_robust_head.futex_offset = offsetof(a0_mtx_t, ftx);
-  a0_robust_head.list_op_pending = NULL;
-  syscall(SYS_set_robust_list, &a0_robust_head.list, sizeof(a0_robust_head));
-}
-
-A0_STATIC_INLINE
-void init_thread() {
-  if (a0_robust_init) {
-    return;
-  }
-
-  pthread_once(&a0_robust_reset_atfork_once, a0_robust_reset_atfork);
-  robust_init();
-  a0_robust_init = true;
-}
-
-A0_STATIC_INLINE
-void robust_op_start(a0_mtx_t* mtx) {
-  init_thread();
-  a0_robust_head.list_op_pending = (struct robust_list*)mtx;
-  a0_barrier();
-}
-
-A0_STATIC_INLINE
-void robust_op_end(a0_mtx_t* mtx) {
-  (void)mtx;
-  a0_barrier();
-  a0_robust_head.list_op_pending = NULL;
-}
-
-A0_STATIC_INLINE
-bool robust_is_head(a0_mtx_t* mtx) {
-  return mtx == (a0_mtx_t*)&a0_robust_head;
-}
-
-A0_STATIC_INLINE
-void robust_op_add(a0_mtx_t* mtx) {
-  a0_mtx_t* old_first = (a0_mtx_t*)a0_robust_head.list.next;
-
-  mtx->prev = (a0_mtx_t*)&a0_robust_head;
-  mtx->next = old_first;
-
-  a0_barrier();
-
-  a0_robust_head.list.next = (robust_list_t*)mtx;
-  if (!robust_is_head(old_first)) {
-    old_first->prev = mtx;
-  }
-}
-
-A0_STATIC_INLINE
-void robust_op_del(a0_mtx_t* mtx) {
-  a0_mtx_t* prev = mtx->prev;
-  a0_mtx_t* next = mtx->next;
-  prev->next = next;
-  if (!robust_is_head(next)) {
-    next->prev = prev;
-  }
-}
-
-A0_STATIC_INLINE
-uint32_t ftx_tid(a0_ftx_t ftx) {
-  return ftx & FUTEX_TID_MASK;
-}
-
-A0_STATIC_INLINE
-bool ftx_owner_died(a0_ftx_t ftx) {
-  return ftx & FUTEX_OWNER_DIED;
-}
-
-static const uint32_t FTX_NOTRECOVERABLE = FUTEX_TID_MASK | FUTEX_OWNER_DIED;
-
-A0_STATIC_INLINE
-bool ftx_notrecoverable(a0_ftx_t ftx) {
-  return (ftx & FTX_NOTRECOVERABLE) == FTX_NOTRECOVERABLE;
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_mtx_timedlock_robust(a0_mtx_t* mtx, const a0_time_mono_t* timeout) {
-  const uint32_t tid = a0_tid();
-
-  int syserr = EINTR;
-  while (syserr == EINTR) {
-    // Can't lock if borked.
-    if (ftx_notrecoverable(a0_atomic_load(&mtx->ftx))) {
-      return A0_MAKE_SYSERR(ENOTRECOVERABLE);
-    }
-
-    // Try to lock without kernel involvement.
-    if (a0_cas(&mtx->ftx, 0, tid)) {
-      return A0_OK;
-    }
-
-    // Ask the kernel to lock.
-    syserr = A0_SYSERR(a0_ftx_lock_pi(&mtx->ftx, timeout));
-  }
-
-  if (!syserr) {
-    if (ftx_owner_died(a0_atomic_load(&mtx->ftx))) {
-      return A0_MAKE_SYSERR(EOWNERDEAD);
-    }
-    return A0_OK;
-  }
-
-  return A0_MAKE_SYSERR(syserr);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_mtx_timedlock_impl(a0_mtx_t* mtx, const a0_time_mono_t* timeout) {
-  // Note: __tsan_mutex_pre_lock should come here, but tsan doesn't provide
-  //       a way to "fail" a lock. Only a trylock.
-  robust_op_start(mtx);
-  const a0_err_t err = a0_mtx_timedlock_robust(mtx, timeout);
-  if (!err || A0_SYSERR(err) == EOWNERDEAD) {
-    __tsan_mutex_pre_lock(mtx, 0);
-    robust_op_add(mtx);
-    __tsan_mutex_post_lock(mtx, 0, 0);
-  }
-  robust_op_end(mtx);
-  return err;
-}
-
-a0_err_t a0_mtx_timedlock(a0_mtx_t* mtx, a0_time_mono_t timeout) {
-  return a0_mtx_timedlock_impl(mtx, &timeout);
-}
-
-a0_err_t a0_mtx_lock(a0_mtx_t* mtx) {
-  return a0_mtx_timedlock_impl(mtx, NULL);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_mtx_trylock_impl(a0_mtx_t* mtx) {
-  const uint32_t tid = a0_tid();
-
-  // Try to lock without kernel involvement.
-  uint32_t old = a0_cas_val(&mtx->ftx, 0, tid);
-
-  // Did it work?
-  if (!old) {
-    robust_op_add(mtx);
-    return A0_OK;
-  }
-
-  // Is the lock still usable?
-  if (ftx_notrecoverable(old)) {
-    return A0_MAKE_SYSERR(ENOTRECOVERABLE);
-  }
-
-  // Is the owner still alive?
-  if (!ftx_owner_died(old)) {
-    return A0_MAKE_SYSERR(EBUSY);
-  }
-
-  // Oh, the owner died. Ask the kernel to fix the state.
-  a0_err_t err = a0_ftx_trylock_pi(&mtx->ftx);
-  if (!err) {
-    robust_op_add(mtx);
-    if (ftx_owner_died(a0_atomic_load(&mtx->ftx))) {
-      return A0_MAKE_SYSERR(EOWNERDEAD);
-    }
-    return A0_OK;
-  }
-
-  // EAGAIN means that somebody else beat us to it.
-  // Anything else means we're borked.
-  if (A0_SYSERR(err) == EAGAIN) {
-    return A0_MAKE_SYSERR(EBUSY);
-  }
-  return A0_MAKE_SYSERR(ENOTRECOVERABLE);
-}
-
-a0_err_t a0_mtx_trylock(a0_mtx_t* mtx) {
-  __tsan_mutex_pre_lock(mtx, __tsan_mutex_try_lock);
-  robust_op_start(mtx);
-  a0_err_t err = a0_mtx_trylock_impl(mtx);
-  robust_op_end(mtx);
-  if (!err || A0_SYSERR(err) == EOWNERDEAD) {
-    __tsan_mutex_post_lock(mtx, __tsan_mutex_try_lock, 0);
-  } else {
-    __tsan_mutex_post_lock(mtx, __tsan_mutex_try_lock | __tsan_mutex_try_lock_failed, 0);
-  }
-  return err;
-}
-
-a0_err_t a0_mtx_consistent(a0_mtx_t* mtx) {
-  const uint32_t val = a0_atomic_load(&mtx->ftx);
-
-  // Why fix what isn't broken?
-  if (!ftx_owner_died(val)) {
-    return A0_MAKE_SYSERR(EINVAL);
-  }
-
-  // Is it yours to fix?
-  if (ftx_tid(val) != a0_tid()) {
-    return A0_MAKE_SYSERR(EPERM);
-  }
-
-  // Fix it!
-  a0_atomic_and_fetch(&mtx->ftx, ~FUTEX_OWNER_DIED);
-
-  return A0_OK;
-}
-
-a0_err_t a0_mtx_unlock(a0_mtx_t* mtx) {
-  const uint32_t tid = a0_tid();
-
-  const uint32_t val = a0_atomic_load(&mtx->ftx);
-
-  // Only the owner can unlock.
-  if (ftx_tid(val) != tid) {
-    return A0_MAKE_SYSERR(EPERM);
-  }
-
-  __tsan_mutex_pre_unlock(mtx, 0);
-
-  // If the mutex was acquired with EOWNERDEAD, the caller is responsible
-  // for fixing the state and marking the mutex consistent. If they did
-  // not mark it consistent and are unlocking... then we are unrecoverably
-  // borked!
-  uint32_t new_val = 0;
-  if (ftx_owner_died(val)) {
-    new_val = FTX_NOTRECOVERABLE;
-  }
-
-  robust_op_start(mtx);
-  robust_op_del(mtx);
-
-  // If the futex is exactly equal to tid, then there are no waiters and the
-  // kernel doesn't need to get involved.
-  if (!a0_cas(&mtx->ftx, tid, new_val)) {
-    // Ask the kernel to wake up a waiter.
-    a0_ftx_unlock_pi(&mtx->ftx);
-    if (new_val) {
-      a0_atomic_or_fetch(&mtx->ftx, new_val);
-    }
-  }
-
-  robust_op_end(mtx);
-  __tsan_mutex_post_unlock(mtx, 0);
-
-  return A0_OK;
-}
-
-// TODO(lshamis): Handle ENOTRECOVERABLE
-A0_STATIC_INLINE
-a0_err_t a0_cnd_timedwait_impl(a0_cnd_t* cnd, a0_mtx_t* mtx, const a0_time_mono_t* timeout) {
-  const uint32_t init_cnd = a0_atomic_load(cnd);
-
-  // Unblock other threads to do the things that will eventually signal this wait.
-  a0_err_t err = a0_mtx_unlock(mtx);
-  if (err) {
-    return err;
-  }
-
-  __tsan_mutex_pre_lock(mtx, 0);
-  robust_op_start(mtx);
-
-  do {
-    // Priority-inheritance-aware wait until awoken or timeout.
-    err = a0_ftx_wait_requeue_pi(cnd, init_cnd, timeout, &mtx->ftx);
-  } while (A0_SYSERR(err) == EINTR);
-
-  // We need to manually lock on timeout.
-  // Note: We keep the timeout error.
-  if (A0_SYSERR(err) == ETIMEDOUT) {
-    a0_mtx_timedlock_robust(mtx, NULL);
-  }
-  // Someone else grabbed and mutated the resource between the unlock and wait.
-  // No need to wait.
-  if (A0_SYSERR(err) == EAGAIN) {
-    err = a0_mtx_timedlock_robust(mtx, NULL);
-  }
-
-  robust_op_add(mtx);
-
-  // If no higher priority error, check the previous owner didn't die.
-  if (!err) {
-    err = ftx_owner_died(a0_atomic_load(&mtx->ftx)) ? EOWNERDEAD : A0_OK;
-  }
-
-  robust_op_end(mtx);
-  __tsan_mutex_post_lock(mtx, 0, 0);
-  return err;
-}
-
-a0_err_t a0_cnd_timedwait(a0_cnd_t* cnd, a0_mtx_t* mtx, a0_time_mono_t timeout) {
-  // Let's not unlock the mutex if we're going to get EINVAL due to a bad timeout.
-  if ((timeout.ts.tv_sec < 0 || timeout.ts.tv_nsec < 0 || (!timeout.ts.tv_sec && !timeout.ts.tv_nsec) || timeout.ts.tv_nsec >= NS_PER_SEC)) {
-    return A0_MAKE_SYSERR(EINVAL);
-  }
-  return a0_cnd_timedwait_impl(cnd, mtx, &timeout);
-}
-
-a0_err_t a0_cnd_wait(a0_cnd_t* cnd, a0_mtx_t* mtx) {
-  return a0_cnd_timedwait_impl(cnd, mtx, NULL);
-}
-
-A0_STATIC_INLINE
-a0_err_t a0_cnd_wake(a0_cnd_t* cnd, a0_mtx_t* mtx, uint32_t cnt) {
-  uint32_t val = a0_atomic_add_fetch(cnd, 1);
-
-  while (true) {
-    a0_err_t err = a0_ftx_cmp_requeue_pi(cnd, val, &mtx->ftx, cnt);
-    if (A0_SYSERR(err) != EAGAIN) {
-      return err;
-    }
-
-    // Another thread is also trying to wake this condition variable.
-    val = a0_atomic_load(cnd);
-  }
-}
-
-a0_err_t a0_cnd_signal(a0_cnd_t* cnd, a0_mtx_t* mtx) {
-  return a0_cnd_wake(cnd, mtx, 1);
-}
-
-a0_err_t a0_cnd_broadcast(a0_cnd_t* cnd, a0_mtx_t* mtx) {
-  return a0_cnd_wake(cnd, mtx, INT_MAX);
-}
diff --git a/src/libipc/platform/linux/a0/mtx.h b/src/libipc/platform/linux/a0/mtx.h
deleted file mode 100644
index d27ce179..00000000
--- a/src/libipc/platform/linux/a0/mtx.h
+++ /dev/null
@@ -1,57 +0,0 @@
-#ifndef A0_MTX_H
-#define A0_MTX_H
-
-#include "a0/err.h"
-#include "a0/time.h"
-#include "a0/unused.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef uint32_t a0_ftx_t;
-
-// https://stackoverflow.com/questions/61645966/is-typedef-allowed-before-definition
-struct a0_mtx_s;
-
-typedef struct a0_mtx_s a0_mtx_t;
-
-// Mutex implementation designed for IPC.
-//
-// Similar to pthread_mutex_t with the following flags fixed:
-// * Process shared.
-// * Robust.
-// * Error checking.
-// * Priority inheriting.
-//
-// Unlike pthread_mutex_t, timespec are expected to use CLOCK_BOOTTIME.
-//
-// struct a0_mtx_s "Inherits" from robust_list, which requires:
-// * The first field MUST be a next pointer.
-// * There must be a futex, which makes the mutex immovable.
-//
-// Note: a mutex MUST be unlocked before being freed or unmapped.
-struct a0_mtx_s {
-  a0_mtx_t* next;
-  a0_mtx_t* prev;
-  a0_ftx_t ftx;
-};
-
-a0_err_t a0_mtx_lock(a0_mtx_t*) A0_WARN_UNUSED_RESULT;
-a0_err_t a0_mtx_timedlock(a0_mtx_t*, a0_time_mono_t) A0_WARN_UNUSED_RESULT;
-a0_err_t a0_mtx_trylock(a0_mtx_t*) A0_WARN_UNUSED_RESULT;
-a0_err_t a0_mtx_consistent(a0_mtx_t*);
-a0_err_t a0_mtx_unlock(a0_mtx_t*);
-
-typedef a0_ftx_t a0_cnd_t;
-
-a0_err_t a0_cnd_wait(a0_cnd_t*, a0_mtx_t*);
-a0_err_t a0_cnd_timedwait(a0_cnd_t*, a0_mtx_t*, a0_time_mono_t);
-a0_err_t a0_cnd_signal(a0_cnd_t*, a0_mtx_t*);
-a0_err_t a0_cnd_broadcast(a0_cnd_t*, a0_mtx_t*);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_MTX_H
diff --git a/src/libipc/platform/linux/a0/strconv.c b/src/libipc/platform/linux/a0/strconv.c
deleted file mode 100644
index 70eedbf8..00000000
--- a/src/libipc/platform/linux/a0/strconv.c
+++ /dev/null
@@ -1,64 +0,0 @@
-#include "strconv.h"
-
-#include "a0/err.h"
-
-#include <string.h>
-
-static const char DECIMAL_DIGITS[] =
-    "00010203040506070809"
-    "10111213141516171819"
-    "20212223242526272829"
-    "30313233343536373839"
-    "40414243444546474849"
-    "50515253545556575859"
-    "60616263646566676869"
-    "70717273747576777879"
-    "80818283848586878889"
-    "90919293949596979899";
-
-a0_err_t a0_u32_to_str(uint32_t val, char* buf_start, char* buf_end, char** start_ptr) {
-  return a0_u64_to_str(val, buf_start, buf_end, start_ptr);
-}
-
-a0_err_t a0_u64_to_str(uint64_t val, char* buf_start, char* buf_end, char** start_ptr) {
-  uint64_t orig_val = val;
-  char* ptr = buf_end;
-  while (val >= 10) {
-    ptr -= 2;
-    memcpy(ptr, &DECIMAL_DIGITS[2 * (val % 100)], sizeof(uint16_t));
-    val /= 100;
-  }
-  if (val) {
-    *--ptr = (char)('0' + val);
-  }
-  memset(buf_start, '0', ptr - buf_start);
-  ptr -= (!orig_val);
-  if (start_ptr) {
-    *start_ptr = ptr;
-  }
-  return A0_OK;
-}
-
-a0_err_t a0_str_to_u32(const char* start, const char* end, uint32_t* out) {
-  *out = 0;
-  for (const char* ptr = start; ptr < end; ptr++) {
-    if (*ptr < '0' || *ptr > '9') {
-      return A0_ERR_INVALID_ARG;
-    }
-    *out *= 10;
-    *out += *ptr - '0';
-  }
-  return A0_OK;
-}
-
-a0_err_t a0_str_to_u64(const char* start, const char* end, uint64_t* out) {
-  *out = 0;
-  for (const char* ptr = start; ptr < end; ptr++) {
-    if (*ptr < '0' || *ptr > '9') {
-      return A0_ERR_INVALID_ARG;
-    }
-    *out *= 10;
-    *out += *ptr - '0';
-  }
-  return A0_OK;
-}
diff --git a/src/libipc/platform/linux/a0/strconv.h b/src/libipc/platform/linux/a0/strconv.h
deleted file mode 100644
index 2f5b743a..00000000
--- a/src/libipc/platform/linux/a0/strconv.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#ifndef A0_SRC_STRCONV_H
-#define A0_SRC_STRCONV_H
-
-#include "a0/err.h"
-
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// Converts a uint32 or uint64 to string.
-// The entire buffer will be populated, if not with given the value, then with '0'.
-// Populates the buffer from the back.
-// start_ptr, if not null, will be set to the point within the buffer where the number starts.
-// Does NOT check for overflow.
-a0_err_t a0_u32_to_str(uint32_t val, char* buf_start, char* buf_end, char** start_ptr);
-a0_err_t a0_u64_to_str(uint64_t val, char* buf_start, char* buf_end, char** start_ptr);
-
-// Converts a string to uint32 or uint64.
-// The string may have leading '0's.
-// Returns A0_ERR_INVALID_ARG if any character is not a digit.
-// Does NOT check for overflow.
-a0_err_t a0_str_to_u32(const char* start, const char* end, uint32_t* out);
-a0_err_t a0_str_to_u64(const char* start, const char* end, uint64_t* out);
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_SRC_STRCONV_H
diff --git a/src/libipc/platform/linux/a0/thread_local.h b/src/libipc/platform/linux/a0/thread_local.h
deleted file mode 100644
index 8e498134..00000000
--- a/src/libipc/platform/linux/a0/thread_local.h
+++ /dev/null
@@ -1,10 +0,0 @@
-#ifndef A0_THREAD_LOCAL_H
-#define A0_THREAD_LOCAL_H
-
-#ifdef __cplusplus
-#define A0_THREAD_LOCAL thread_local
-#else
-#define A0_THREAD_LOCAL _Thread_local
-#endif  // __cplusplus
-
-#endif  // A0_THREAD_LOCAL_H
diff --git a/src/libipc/platform/linux/a0/tid.c b/src/libipc/platform/linux/a0/tid.c
deleted file mode 100644
index 9ad016a7..00000000
--- a/src/libipc/platform/linux/a0/tid.c
+++ /dev/null
@@ -1,30 +0,0 @@
-#include "a0/inline.h"
-#include "a0/thread_local.h"
-#include "a0/tid.h"
-
-#include <pthread.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <syscall.h>
-#include <unistd.h>
-
-A0_THREAD_LOCAL uint32_t a0_tid_cache = 0;
-static pthread_once_t a0_tid_reset_atfork_once;
-
-A0_STATIC_INLINE
-void a0_tid_reset() {
-  a0_tid_cache = 0;
-}
-
-A0_STATIC_INLINE
-void a0_tid_reset_atfork() {
-  pthread_atfork(NULL, NULL, &a0_tid_reset);
-}
-
-uint32_t a0_tid() {
-  if (!a0_tid_cache) {
-    a0_tid_cache = syscall(SYS_gettid);
-    pthread_once(&a0_tid_reset_atfork_once, a0_tid_reset_atfork);
-  }
-  return a0_tid_cache;
-}
diff --git a/src/libipc/platform/linux/a0/tid.h b/src/libipc/platform/linux/a0/tid.h
deleted file mode 100644
index 11cb71cd..00000000
--- a/src/libipc/platform/linux/a0/tid.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef A0_TID_H
-#define A0_TID_H
-
-#include <stdint.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-uint32_t a0_tid();
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_TID_H
diff --git a/src/libipc/platform/linux/a0/time.c b/src/libipc/platform/linux/a0/time.c
deleted file mode 100644
index 09a79b4a..00000000
--- a/src/libipc/platform/linux/a0/time.c
+++ /dev/null
@@ -1,124 +0,0 @@
-#include "a0/empty.h"
-#include "a0/err.h"
-#include "a0/time.h"
-
-#include <stdint.h>
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-
-#include "clock.h"
-#include "err_macro.h"
-#include "strconv.h"
-
-const char A0_TIME_MONO[] = "a0_time_mono";
-
-a0_err_t a0_time_mono_now(a0_time_mono_t* out) {
-  return a0_clock_now(CLOCK_BOOTTIME, &out->ts);
-}
-
-a0_err_t a0_time_mono_str(a0_time_mono_t time_mono, char mono_str[20]) {
-  // Mono time as unsigned integer with up to 20 chars: "18446744072709551615"
-  uint64_t ns = time_mono.ts.tv_sec * NS_PER_SEC + time_mono.ts.tv_nsec;
-  mono_str[19] = '\0';
-  return a0_u64_to_str(ns, mono_str, mono_str + 19, NULL);
-}
-
-a0_err_t a0_time_mono_parse(const char mono_str[20], a0_time_mono_t* out) {
-  uint64_t ns;
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u64(mono_str, mono_str + 19, &ns));
-  out->ts.tv_sec = ns / NS_PER_SEC;
-  out->ts.tv_nsec = ns % NS_PER_SEC;
-  return A0_OK;
-}
-
-a0_err_t a0_time_mono_add(a0_time_mono_t time_mono, int64_t add_nsec, a0_time_mono_t* out) {
-  return a0_clock_add(time_mono.ts, add_nsec, &out->ts);
-}
-
-const char A0_TIME_WALL[] = "a0_time_wall";
-
-a0_err_t a0_time_wall_now(a0_time_wall_t* out) {
-  A0_RETURN_SYSERR_ON_MINUS_ONE(clock_gettime(CLOCK_REALTIME, &out->ts));
-  return A0_OK;
-}
-
-a0_err_t a0_time_wall_str(a0_time_wall_t wall_time, char wall_str[36]) {
-  // Wall time in RFC 3999 Nano: "2006-01-02T15:04:05.999999999-07:00"
-  struct tm wall_tm;
-  gmtime_r(&wall_time.ts.tv_sec, &wall_tm);
-
-  strftime(&wall_str[0], 20, "%Y-%m-%dT%H:%M:%S", &wall_tm);
-  snprintf(&wall_str[19], 17, ".%09ld-00:00", wall_time.ts.tv_nsec);
-  wall_str[35] = '\0';
-
-  return A0_OK;
-}
-
-a0_err_t a0_time_wall_parse(const char wall_str[36], a0_time_wall_t* out) {
-  // strptime requires _GNU_SOURCE, which we don't want, so we do it our selves.
-  // Hard code "%Y-%m-%dT%H:%M:%S" + ".%09ld-00:00" pattern.
-
-  struct tm wall_tm = A0_EMPTY;
-  // %Y
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 0, wall_str + 4, (uint32_t*)&wall_tm.tm_year));
-  wall_tm.tm_year -= 1900;
-  // -
-  if (wall_str[4] != '-') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %m
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 5, wall_str + 7, (uint32_t*)&wall_tm.tm_mon));
-  if (wall_tm.tm_mon < 1 || wall_tm.tm_mon > 12) {
-    return A0_ERR_INVALID_ARG;
-  }
-  wall_tm.tm_mon--;
-  // -
-  if (wall_str[7] != '-') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %d
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 8, wall_str + 10, (uint32_t*)&wall_tm.tm_mday));
-  if (wall_tm.tm_mday < 1 || wall_tm.tm_mday > 31) {
-    return A0_ERR_INVALID_ARG;
-  }
-  // T
-  if (wall_str[10] != 'T') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %H
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 11, wall_str + 13, (uint32_t*)&wall_tm.tm_hour));
-  if (wall_tm.tm_hour > 24) {
-    return A0_ERR_INVALID_ARG;
-  }
-  // :
-  if (wall_str[13] != ':') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %M
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 14, wall_str + 16, (uint32_t*)&wall_tm.tm_min));
-  if (wall_tm.tm_min > 60) {
-    return A0_ERR_INVALID_ARG;
-  }
-  // :
-  if (wall_str[16] != ':') {
-    return A0_ERR_INVALID_ARG;
-  }
-  // %S
-  A0_RETURN_ERR_ON_ERR(a0_str_to_u32(wall_str + 17, wall_str + 19, (uint32_t*)&wall_tm.tm_sec));
-  if (wall_tm.tm_sec > 61) {
-    return A0_ERR_INVALID_ARG;
-  }
-  // .
-  if (wall_str[19] != '.') {
-    return A0_ERR_INVALID_ARG;
-  }
-
-  if (memcmp(wall_str + 29, "-00:00", 6) != 0) {
-    return A0_ERR_INVALID_ARG;
-  }
-
-  // Use timegm, cause it's a pain to compute months/years to seconds.
-  out->ts.tv_sec = timegm(&wall_tm);
-  return a0_str_to_u64(wall_str + 20, wall_str + 29, (uint64_t*)&out->ts.tv_nsec);
-}
diff --git a/src/libipc/platform/linux/a0/time.h b/src/libipc/platform/linux/a0/time.h
deleted file mode 100644
index 77e49c4d..00000000
--- a/src/libipc/platform/linux/a0/time.h
+++ /dev/null
@@ -1,97 +0,0 @@
-/**
- * \file time.h
- * \rst
- *
- * Mono Time
- * ---------
- *
- * | Mono time is a number of nanoseconds from machine boottime.
- * | This time cannot decrease and duration between ticks is constant.
- * | This time is not related to wall clock time.
- * | This time is most suitable for measuring durations.
- * |
- * | As a string, it is represented as a 20 char number:
- * | **18446744072709551615**
- * |
- * | Note that this uses CLOCK_BOOTTIME under the hood, not CLOCK_MONOTONIC.
- *
- * Wall Time
- * ---------
- *
- * | Wall time is an time object representing human-readable wall clock time.
- * | This time can decrease and duration between ticks is not constant.
- * | This time is most related to wall clock time.
- * | This time is not suitable for measuring durations.
- * |
- * | As a string, it is represented as a 36 char RFC 3999 Nano / ISO 8601:
- * | **2006-01-02T15:04:05.999999999-07:00**
- *
- * \endrst
- */
-
-#ifndef A0_TIME_H
-#define A0_TIME_H
-
-#include "a0/err.h"
-
-#include <stdint.h>
-#include <time.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/** \addtogroup TIME_MONO
- *  @{
- */
-
-/// Header key for mono timestamps.
-extern const char A0_TIME_MONO[];
-
-/// Monotonic timestamp. Despite the name, uses CLOCK_BOOTTIME.
-typedef struct a0_time_mono_s {
-  struct timespec ts;
-} a0_time_mono_t;
-
-/// Get the current mono timestamps.
-a0_err_t a0_time_mono_now(a0_time_mono_t*);
-
-/// Stringify a given mono timestamps.
-a0_err_t a0_time_mono_str(a0_time_mono_t, char mono_str[20]);
-
-/// Parse a stringified mono timestamps.
-a0_err_t a0_time_mono_parse(const char mono_str[20], a0_time_mono_t*);
-
-/// Add a duration in nanoseconds to a mono timestamp.
-a0_err_t a0_time_mono_add(a0_time_mono_t, int64_t add_nsec, a0_time_mono_t*);
-
-/** @}*/
-
-/** \addtogroup TIME_WALL
- *  @{
- */
-
-/// Header key for wall timestamps.
-extern const char A0_TIME_WALL[];
-
-/// Wall clock timestamp.
-typedef struct a0_time_wall_s {
-  struct timespec ts;
-} a0_time_wall_t;
-
-/// Get the current wall timestamps.
-a0_err_t a0_time_wall_now(a0_time_wall_t*);
-
-/// Stringify a given wall timestamps.
-a0_err_t a0_time_wall_str(a0_time_wall_t, char wall_str[36]);
-
-/// Parse a stringified wall timestamps.
-a0_err_t a0_time_wall_parse(const char wall_str[36], a0_time_wall_t*);
-
-/** @}*/
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif  // A0_TRANSPORT_H
diff --git a/src/libipc/platform/linux/a0/unused.h b/src/libipc/platform/linux/a0/unused.h
deleted file mode 100644
index 8b1025a4..00000000
--- a/src/libipc/platform/linux/a0/unused.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#ifndef A0_UNUSED_H
-#define A0_UNUSED_H
-
-#define A0_WARN_UNUSED_RESULT __attribute__((warn_unused_result))
-#define A0_MAYBE_UNUSED(X) ((void)(X))
-
-#endif  // A0_UNUSED_H
diff --git a/src/libipc/platform/linux/condition.h b/src/libipc/platform/linux/condition.h
deleted file mode 100644
index c4f00ca7..00000000
--- a/src/libipc/platform/linux/condition.h
+++ /dev/null
@@ -1,66 +0,0 @@
-#pragma once
-
-#include "libipc/utility/log.h"
-#include "libipc/mutex.h"
-
-#include "get_wait_time.h"
-#include "sync_obj_impl.h"
-
-#include "a0/err_macro.h"
-#include "a0/mtx.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class condition : public sync::obj_impl<a0_cnd_t> {
-public:
-    condition() = default;
-    ~condition() = default;
-
-    bool wait(ipc::sync::mutex &mtx, std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        if (tm == invalid_value) {
-            int eno = A0_SYSERR(a0_cnd_wait(native(), static_cast<a0_mtx_t *>(mtx.native())));
-            if (eno != 0) {
-                ipc::error("fail condition wait[%d]\n", eno);
-                return false;
-            }
-        } else {
-            auto ts = detail::make_timespec(tm);
-            int eno = A0_SYSERR(a0_cnd_timedwait(native(), static_cast<a0_mtx_t *>(mtx.native()), {ts}));
-            if (eno != 0) {
-                if (eno != ETIMEDOUT) {
-                    ipc::error("fail condition timedwait[%d]: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                                eno, tm, ts.tv_sec, ts.tv_nsec);
-                }
-                return false;
-            }
-        }
-        return true;
-    }
-
-    bool notify(ipc::sync::mutex &mtx) noexcept {
-        if (!valid()) return false;
-        int eno = A0_SYSERR(a0_cnd_signal(native(), static_cast<a0_mtx_t *>(mtx.native())));
-        if (eno != 0) {
-            ipc::error("fail condition notify[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-
-    bool broadcast(ipc::sync::mutex &mtx) noexcept {
-        if (!valid()) return false;
-        int eno = A0_SYSERR(a0_cnd_broadcast(native(), static_cast<a0_mtx_t *>(mtx.native())));
-        if (eno != 0) {
-            ipc::error("fail condition broadcast[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/linux/get_wait_time.h b/src/libipc/platform/linux/get_wait_time.h
deleted file mode 100644
index ffaf2d29..00000000
--- a/src/libipc/platform/linux/get_wait_time.h
+++ /dev/null
@@ -1,46 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <cinttypes>
-#include <system_error>
-
-#include "libipc/utility/log.h"
-
-#include "a0/time.h"
-#include "a0/err_macro.h"
-
-namespace ipc {
-namespace detail {
-
-inline bool calc_wait_time(timespec &ts, std::uint64_t tm /*ms*/) noexcept {
-    std::int64_t add_ns = static_cast<std::int64_t>(tm * 1000000ull);
-    if (add_ns < 0) {
-        ipc::error("invalid time = " PRIu64 "\n", tm);
-        return false;
-    }
-    a0_time_mono_t now;
-    int eno = A0_SYSERR(a0_time_mono_now(&now));
-    if (eno != 0) {
-        ipc::error("fail get time[%d]\n", eno);
-        return false;
-    }
-    a0_time_mono_t *target = reinterpret_cast<a0_time_mono_t *>(&ts);
-    if ((eno = A0_SYSERR(a0_time_mono_add(now, add_ns, target))) != 0) {
-        ipc::error("fail get time[%d]\n", eno);
-        return false;
-    }
-    return true;
-}
-
-inline timespec make_timespec(std::uint64_t tm /*ms*/) noexcept(false) {
-    timespec ts {};
-    if (!calc_wait_time(ts, tm)) {
-        ipc::error("fail calc_wait_time: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                    tm, ts.tv_sec, ts.tv_nsec);
-        throw std::system_error{static_cast<int>(errno), std::system_category()};
-    }
-    return ts;
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/linux/mutex.h b/src/libipc/platform/linux/mutex.h
deleted file mode 100644
index 91f156b4..00000000
--- a/src/libipc/platform/linux/mutex.h
+++ /dev/null
@@ -1,204 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <system_error>
-#include <mutex>
-#include <atomic>
-
-#include "libipc/platform/detail.h"
-#include "libipc/utility/log.h"
-#include "libipc/memory/resource.h"
-#include "libipc/shm.h"
-
-#include "get_wait_time.h"
-#include "sync_obj_impl.h"
-
-#include "a0/err_macro.h"
-#include "a0/mtx.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class robust_mutex : public sync::obj_impl<a0_mtx_t> {
-public:
-    bool lock(std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        for (;;) {
-            auto ts = detail::make_timespec(tm);
-            int eno = A0_SYSERR(
-                (tm == invalid_value) ? a0_mtx_lock(native()) 
-                                      : a0_mtx_timedlock(native(), {ts}));
-            switch (eno) {
-            case 0:
-                return true;
-            case ETIMEDOUT:
-                return false;
-            case EOWNERDEAD: {
-                    int eno2 = A0_SYSERR(a0_mtx_consistent(native()));
-                    if (eno2 != 0) {
-                        ipc::error("fail mutex lock[%d] -> consistent[%d]\n", eno, eno2);
-                        return false;
-                    }
-                    int eno3 = A0_SYSERR(a0_mtx_unlock(native()));
-                    if (eno3 != 0) {
-                        ipc::error("fail mutex lock[%d] -> unlock[%d]\n", eno, eno3);
-                        return false;
-                    }
-                }
-                break; // loop again
-            default:
-                ipc::error("fail mutex lock[%d]\n", eno);
-                return false;
-            }
-        }
-    }
-
-    bool try_lock() noexcept(false) {
-        if (!valid()) return false;
-        int eno = A0_SYSERR(a0_mtx_timedlock(native(), {detail::make_timespec(0)}));
-        switch (eno) {
-        case 0:
-            return true;
-        case ETIMEDOUT:
-            return false;
-        case EOWNERDEAD: {
-                int eno2 = A0_SYSERR(a0_mtx_consistent(native()));
-                if (eno2 != 0) {
-                    ipc::error("fail mutex try_lock[%d] -> consistent[%d]\n", eno, eno2);
-                    break;
-                }
-                int eno3 = A0_SYSERR(a0_mtx_unlock(native()));
-                if (eno3 != 0) {
-                    ipc::error("fail mutex try_lock[%d] -> unlock[%d]\n", eno, eno3);
-                    break;
-                }
-            }
-            break;
-        default:
-            ipc::error("fail mutex try_lock[%d]\n", eno);
-            break;
-        }
-        throw std::system_error{eno, std::system_category()};
-    }
-
-    bool unlock() noexcept {
-        if (!valid()) return false;
-        int eno = A0_SYSERR(a0_mtx_unlock(native()));
-        if (eno != 0) {
-            ipc::error("fail mutex unlock[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-};
-
-class mutex {
-    robust_mutex *mutex_ = nullptr;
-    std::atomic<std::int32_t> *ref_ = nullptr;
-
-    struct curr_prog {
-        struct shm_data {
-            robust_mutex mtx;
-            std::atomic<std::int32_t> ref;
-
-            struct init {
-                char const *name;
-            };
-            shm_data(init arg)
-                : mtx{}, ref{0} { mtx.open(arg.name); }
-        };
-        ipc::map<ipc::string, shm_data> mutex_handles;
-        std::mutex lock;
-
-        static curr_prog &get() {
-            static curr_prog info;
-            return info;
-        }
-    };
-
-    void acquire_mutex(char const *name) {
-        if (name == nullptr) {
-            return;
-        }
-        auto &info = curr_prog::get();
-        IPC_UNUSED_ std::lock_guard<std::mutex> guard {info.lock};
-        auto it = info.mutex_handles.find(name);
-        if (it == info.mutex_handles.end()) {
-            it = curr_prog::get().mutex_handles.emplace(name, 
-                              curr_prog::shm_data::init{name}).first;
-        }
-        mutex_ = &it->second.mtx;
-        ref_   = &it->second.ref;
-    }
-
-    template <typename F>
-    void release_mutex(ipc::string const &name, F &&clear) {
-        if (name.empty()) return;
-        IPC_UNUSED_ std::lock_guard<std::mutex> guard {curr_prog::get().lock};
-        auto it = curr_prog::get().mutex_handles.find(name);
-        if (it == curr_prog::get().mutex_handles.end()) {
-            return;
-        }
-        if (clear()) {
-            curr_prog::get().mutex_handles.erase(it);
-        }
-    }
-
-public:
-    mutex() = default;
-    ~mutex() = default;
-
-    a0_mtx_t const *native() const noexcept {
-        return valid() ? mutex_->native() : nullptr;
-    }
-
-    a0_mtx_t *native() noexcept {
-        return valid() ? mutex_->native() : nullptr;
-    }
-
-    bool valid() const noexcept {
-        return (mutex_ != nullptr) && (ref_ != nullptr) && mutex_->valid();
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        acquire_mutex(name);
-        if (!valid()) {
-            return false;
-        }
-        ref_->fetch_add(1, std::memory_order_relaxed);
-        return true;
-    }
-
-    void close() noexcept {
-        if ((mutex_ != nullptr) && (ref_ != nullptr)) {
-            if (mutex_->name() != nullptr) {
-                release_mutex(mutex_->name(), [this] {
-                    return ref_->fetch_sub(1, std::memory_order_relaxed) <= 1;
-                });
-            } else mutex_->close();
-        }
-        mutex_ = nullptr;
-        ref_   = nullptr;
-    }
-
-    bool lock(std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        return mutex_->lock(tm);
-    }
-
-    bool try_lock() noexcept(false) {
-        if (!valid()) return false;
-        return mutex_->try_lock();
-    }
-
-    bool unlock() noexcept {
-        if (!valid()) return false;
-        return mutex_->unlock();
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/linux/sync_obj_impl.h b/src/libipc/platform/linux/sync_obj_impl.h
deleted file mode 100644
index e28f95dc..00000000
--- a/src/libipc/platform/linux/sync_obj_impl.h
+++ /dev/null
@@ -1,69 +0,0 @@
-#pragma once
-
-#include "libipc/utility/log.h"
-#include "libipc/shm.h"
-
-#include "a0/empty.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-template <typename SyncT>
-class obj_impl {
-public:
-    using sync_t = SyncT;
-
-protected:
-    ipc::shm::handle shm_;
-    sync_t *h_ = nullptr;
-
-    sync_t *acquire_handle(char const *name) {
-        if (!shm_.acquire(name, sizeof(sync_t))) {
-            ipc::error("[acquire_handle] fail shm.acquire: %s\n", name);
-            return nullptr;
-        }
-        return static_cast<sync_t *>(shm_.get());
-    }
-
-public:
-    obj_impl() = default;
-    ~obj_impl() = default;
-
-    sync_t const *native() const noexcept {
-        return h_;
-    }
-
-    sync_t *native() noexcept {
-        return h_;
-    }
-
-    char const *name() const noexcept {
-        return shm_.name();
-    }
-
-    bool valid() const noexcept {
-        return h_ != nullptr;
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        if ((h_ = acquire_handle(name)) == nullptr) {
-            return false;
-        }
-        if (shm_.ref() > 1) {
-            return true;
-        }
-        *h_ = A0_EMPTY;
-        return true;
-    }
-
-    void close() noexcept {
-        shm_.release();
-        h_ = nullptr;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/platform.c b/src/libipc/platform/platform.c
deleted file mode 100644
index 49cc977b..00000000
--- a/src/libipc/platform/platform.c
+++ /dev/null
@@ -1,13 +0,0 @@
-
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#elif defined(IPC_OS_LINUX_)
-#include "libipc/platform/linux/a0/err.c"
-#include "libipc/platform/linux/a0/mtx.c"
-#include "libipc/platform/linux/a0/strconv.c"
-#include "libipc/platform/linux/a0/tid.c"
-#include "libipc/platform/linux/a0/time.c"
-#elif defined(IPC_OS_QNX_)
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
diff --git a/src/libipc/platform/platform.cpp b/src/libipc/platform/platform.cpp
deleted file mode 100644
index b77cbc97..00000000
--- a/src/libipc/platform/platform.cpp
+++ /dev/null
@@ -1,9 +0,0 @@
-
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#include "libipc/platform/win/shm_win.cpp"
-#elif defined(IPC_OS_LINUX_) || defined(IPC_OS_QNX_)
-#include "libipc/platform/posix/shm_posix.cpp"
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
diff --git a/src/libipc/platform/posix/condition.h b/src/libipc/platform/posix/condition.h
deleted file mode 100644
index d283d687..00000000
--- a/src/libipc/platform/posix/condition.h
+++ /dev/null
@@ -1,141 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <cstring>
-
-#include <pthread.h>
-
-#include "libipc/utility/log.h"
-#include "libipc/utility/scope_guard.h"
-#include "libipc/mutex.h"
-#include "libipc/shm.h"
-
-#include "get_wait_time.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class condition {
-    ipc::shm::handle shm_;
-    pthread_cond_t *cond_ = nullptr;
-
-    pthread_cond_t *acquire_cond(char const *name) {
-        if (!shm_.acquire(name, sizeof(pthread_cond_t))) {
-            ipc::error("[acquire_cond] fail shm.acquire: %s\n", name);
-            return nullptr;
-        }
-        return static_cast<pthread_cond_t *>(shm_.get());
-    }
-
-public:
-    condition() = default;
-    ~condition() = default;
-
-    pthread_cond_t const *native() const noexcept {
-        return cond_;
-    }
-
-    pthread_cond_t *native() noexcept {
-        return cond_;
-    }
-
-    bool valid() const noexcept {
-        static const char tmp[sizeof(pthread_cond_t)] {};
-        return (cond_ != nullptr)
-            && (std::memcmp(tmp, cond_, sizeof(pthread_cond_t)) != 0);
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        if ((cond_ = acquire_cond(name)) == nullptr) {
-            return false;
-        }
-        if (shm_.ref() > 1) {
-            return valid();
-        }
-        ::pthread_cond_destroy(cond_);
-        auto finally = ipc::guard([this] { close(); }); // close when failed
-        // init condition
-        int eno;
-        pthread_condattr_t cond_attr;
-        if ((eno = ::pthread_condattr_init(&cond_attr)) != 0) {
-            ipc::error("fail pthread_condattr_init[%d]\n", eno);
-            return false;
-        }
-        IPC_UNUSED_ auto guard_cond_attr = guard([&cond_attr] { ::pthread_condattr_destroy(&cond_attr); });
-        if ((eno = ::pthread_condattr_setpshared(&cond_attr, PTHREAD_PROCESS_SHARED)) != 0) {
-            ipc::error("fail pthread_condattr_setpshared[%d]\n", eno);
-            return false;
-        }
-        *cond_ = PTHREAD_COND_INITIALIZER;
-        if ((eno = ::pthread_cond_init(cond_, &cond_attr)) != 0) {
-            ipc::error("fail pthread_cond_init[%d]\n", eno);
-            return false;
-        }
-        finally.dismiss();
-        return valid();
-    }
-
-    void close() noexcept {
-        if ((shm_.ref() <= 1) && cond_ != nullptr) {
-            int eno;
-            if ((eno = ::pthread_cond_destroy(cond_)) != 0) {
-                ipc::error("fail pthread_cond_destroy[%d]\n", eno);
-            }
-        }
-        shm_.release();
-        cond_ = nullptr;
-    }
-
-    bool wait(ipc::sync::mutex &mtx, std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        switch (tm) {
-        case invalid_value: {
-                int eno;
-                if ((eno = ::pthread_cond_wait(cond_, static_cast<pthread_mutex_t *>(mtx.native()))) != 0) {
-                    ipc::error("fail pthread_cond_wait[%d]\n", eno);
-                    return false;
-                }
-            }
-            break;
-        default: {
-                auto ts = detail::make_timespec(tm);
-                int eno;
-                if ((eno = ::pthread_cond_timedwait(cond_, static_cast<pthread_mutex_t *>(mtx.native()), &ts)) != 0) {
-                    if (eno != ETIMEDOUT) {
-                        ipc::error("fail pthread_cond_timedwait[%d]: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                                   eno, tm, ts.tv_sec, ts.tv_nsec);
-                    }
-                    return false;
-                }
-            }
-            break;
-        }
-        return true;
-    }
-
-    bool notify(ipc::sync::mutex &) noexcept {
-        if (!valid()) return false;
-        int eno;
-        if ((eno = ::pthread_cond_signal(cond_)) != 0) {
-            ipc::error("fail pthread_cond_signal[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-
-    bool broadcast(ipc::sync::mutex &) noexcept {
-        if (!valid()) return false;
-        int eno;
-        if ((eno = ::pthread_cond_broadcast(cond_)) != 0) {
-            ipc::error("fail pthread_cond_broadcast[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/def.h b/src/libipc/platform/posix/def.h
new file mode 100644
index 00000000..71f48cf2
--- /dev/null
+++ b/src/libipc/platform/posix/def.h
@@ -0,0 +1,18 @@
+/**
+ * \file libipc/platform/posix/mmap.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+namespace posix {
+
+enum : int {
+  succ   = 0,
+  failed = -1,
+};
+
+} // namespace posix
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/get_wait_time.h b/src/libipc/platform/posix/get_wait_time.h
deleted file mode 100644
index 785cd754..00000000
--- a/src/libipc/platform/posix/get_wait_time.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <system_error>
-
-#include <sys/time.h>
-#include <time.h>
-#include <errno.h>
-
-#include "libipc/utility/log.h"
-
-namespace ipc {
-namespace detail {
-
-inline bool calc_wait_time(timespec &ts, std::uint64_t tm /*ms*/) noexcept {
-    timeval now;
-    int eno = ::gettimeofday(&now, NULL);
-    if (eno != 0) {
-        ipc::error("fail gettimeofday [%d]\n", eno);
-        return false;
-    }
-    ts.tv_nsec = (now.tv_usec + (tm % 1000) * 1000) * 1000;
-    ts.tv_sec  =  now.tv_sec  + (tm / 1000) + (ts.tv_nsec / 1000000000l);
-    ts.tv_nsec %= 1000000000l;
-    return true;
-}
-
-inline timespec make_timespec(std::uint64_t tm /*ms*/) noexcept(false) {
-    timespec ts {};
-    if (!calc_wait_time(ts, tm)) {
-        ipc::error("fail calc_wait_time: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                    tm, ts.tv_sec, ts.tv_nsec);
-        throw std::system_error{static_cast<int>(errno), std::system_category()};
-    }
-    return ts;
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/mutex.h b/src/libipc/platform/posix/mutex.h
deleted file mode 100644
index 8f7525f0..00000000
--- a/src/libipc/platform/posix/mutex.h
+++ /dev/null
@@ -1,237 +0,0 @@
-#pragma once
-
-#include <cstring>
-#include <cassert>
-#include <cstdint>
-#include <system_error>
-#include <mutex>
-#include <atomic>
-
-#include <pthread.h>
-
-#include "libipc/platform/detail.h"
-#include "libipc/utility/log.h"
-#include "libipc/utility/scope_guard.h"
-#include "libipc/memory/resource.h"
-#include "libipc/shm.h"
-
-#include "get_wait_time.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class mutex {
-    ipc::shm::handle *shm_ = nullptr;
-    std::atomic<std::int32_t> *ref_ = nullptr;
-    pthread_mutex_t *mutex_ = nullptr;
-
-    struct curr_prog {
-        struct shm_data {
-            ipc::shm::handle shm;
-            std::atomic<std::int32_t> ref;
-
-            struct init {
-                char const *name;
-                std::size_t size;
-            };
-            shm_data(init arg)
-                : shm{arg.name, arg.size}, ref{0} {}
-        };
-        ipc::map<ipc::string, shm_data> mutex_handles;
-        std::mutex lock;
-
-        static curr_prog &get() {
-            static curr_prog info;
-            return info;
-        }
-    };
-
-    pthread_mutex_t *acquire_mutex(char const *name) {
-        if (name == nullptr) {
-            return nullptr;
-        }
-        auto &info = curr_prog::get();
-        IPC_UNUSED_ std::lock_guard<std::mutex> guard {info.lock};
-        auto it = info.mutex_handles.find(name);
-        if (it == info.mutex_handles.end()) {
-            it = curr_prog::get().mutex_handles.emplace(name, 
-                              curr_prog::shm_data::init{name, sizeof(pthread_mutex_t)}).first;
-        }
-        shm_ = &it->second.shm;
-        ref_ = &it->second.ref;
-        if (shm_ == nullptr) {
-            return nullptr;
-        }
-        return static_cast<pthread_mutex_t *>(shm_->get());
-    }
-
-    template <typename F>
-    void release_mutex(ipc::string const &name, F &&clear) {
-        if (name.empty()) return;
-        IPC_UNUSED_ std::lock_guard<std::mutex> guard {curr_prog::get().lock};
-        auto it = curr_prog::get().mutex_handles.find(name);
-        if (it == curr_prog::get().mutex_handles.end()) {
-            return;
-        }
-        if (clear()) {
-            curr_prog::get().mutex_handles.erase(it);
-        }
-    }
-
-public:
-    mutex() = default;
-    ~mutex() = default;
-
-    pthread_mutex_t const *native() const noexcept {
-        return mutex_;
-    }
-
-    pthread_mutex_t *native() noexcept {
-        return mutex_;
-    }
-
-    bool valid() const noexcept {
-        static const char tmp[sizeof(pthread_mutex_t)] {};
-        return (shm_ != nullptr) && (ref_ != nullptr) && (mutex_ != nullptr)
-            && (std::memcmp(tmp, mutex_, sizeof(pthread_mutex_t)) != 0);
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        if ((mutex_ = acquire_mutex(name)) == nullptr) {
-            return false;
-        }
-        auto self_ref = ref_->fetch_add(1, std::memory_order_relaxed);
-        if (shm_->ref() > 1 || self_ref > 0) {
-            return valid();
-        }
-        ::pthread_mutex_destroy(mutex_);
-        auto finally = ipc::guard([this] { close(); }); // close when failed
-        // init mutex
-        int eno;
-        pthread_mutexattr_t mutex_attr;
-        if ((eno = ::pthread_mutexattr_init(&mutex_attr)) != 0) {
-            ipc::error("fail pthread_mutexattr_init[%d]\n", eno);
-            return false;
-        }
-        IPC_UNUSED_ auto guard_mutex_attr = guard([&mutex_attr] { ::pthread_mutexattr_destroy(&mutex_attr); });
-        if ((eno = ::pthread_mutexattr_setpshared(&mutex_attr, PTHREAD_PROCESS_SHARED)) != 0) {
-            ipc::error("fail pthread_mutexattr_setpshared[%d]\n", eno);
-            return false;
-        }
-        if ((eno = ::pthread_mutexattr_setrobust(&mutex_attr, PTHREAD_MUTEX_ROBUST)) != 0) {
-            ipc::error("fail pthread_mutexattr_setrobust[%d]\n", eno);
-            return false;
-        }
-        *mutex_ = PTHREAD_MUTEX_INITIALIZER;
-        if ((eno = ::pthread_mutex_init(mutex_, &mutex_attr)) != 0) {
-            ipc::error("fail pthread_mutex_init[%d]\n", eno);
-            return false;
-        }
-        finally.dismiss();
-        return valid();
-    }
-
-    void close() noexcept {
-        if ((ref_ != nullptr) && (shm_ != nullptr) && (mutex_ != nullptr)) {
-            if (shm_->name() != nullptr) {
-                release_mutex(shm_->name(), [this] {
-                    auto self_ref = ref_->fetch_sub(1, std::memory_order_relaxed);
-                    if ((shm_->ref() <= 1) && (self_ref <= 1)) {
-                        int eno;
-                        if ((eno = ::pthread_mutex_destroy(mutex_)) != 0) {
-                            ipc::error("fail pthread_mutex_destroy[%d]\n", eno);
-                        }
-                        return true;
-                    }
-                    return false;
-                });
-            } else shm_->release();
-        }
-        shm_   = nullptr;
-        ref_   = nullptr;
-        mutex_ = nullptr;
-    }
-
-    bool lock(std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        for (;;) {
-            auto ts = detail::make_timespec(tm);
-            int eno = (tm == invalid_value) 
-                ? ::pthread_mutex_lock(mutex_) 
-                : ::pthread_mutex_timedlock(mutex_, &ts);
-            switch (eno) {
-            case 0:
-                return true;
-            case ETIMEDOUT:
-                return false;
-            case EOWNERDEAD: {
-                    if (shm_->ref() > 1) {
-                        shm_->sub_ref();
-                    }
-                    int eno2 = ::pthread_mutex_consistent(mutex_);
-                    if (eno2 != 0) {
-                        ipc::error("fail pthread_mutex_lock[%d], pthread_mutex_consistent[%d]\n", eno, eno2);
-                        return false;
-                    }
-                    int eno3 = ::pthread_mutex_unlock(mutex_);
-                    if (eno3 != 0) {
-                        ipc::error("fail pthread_mutex_lock[%d], pthread_mutex_unlock[%d]\n", eno, eno3);
-                        return false;
-                    }
-                }
-                break; // loop again
-            default:
-                ipc::error("fail pthread_mutex_lock[%d]\n", eno);
-                return false;
-            }
-        }
-    }
-
-    bool try_lock() noexcept(false) {
-        if (!valid()) return false;
-        auto ts = detail::make_timespec(0);
-        int eno = ::pthread_mutex_timedlock(mutex_, &ts);
-        switch (eno) {
-        case 0:
-            return true;
-        case ETIMEDOUT:
-            return false;
-        case EOWNERDEAD: {
-                if (shm_->ref() > 1) {
-                    shm_->sub_ref();
-                }
-                int eno2 = ::pthread_mutex_consistent(mutex_);
-                if (eno2 != 0) {
-                    ipc::error("fail pthread_mutex_timedlock[%d], pthread_mutex_consistent[%d]\n", eno, eno2);
-                    break;
-                }
-                int eno3 = ::pthread_mutex_unlock(mutex_);
-                if (eno3 != 0) {
-                    ipc::error("fail pthread_mutex_timedlock[%d], pthread_mutex_unlock[%d]\n", eno, eno3);
-                    break;
-                }
-            }
-            break;
-        default:
-            ipc::error("fail pthread_mutex_timedlock[%d]\n", eno);
-            break;
-        }
-        throw std::system_error{eno, std::system_category()};
-    }
-
-    bool unlock() noexcept {
-        if (!valid()) return false;
-        int eno;
-        if ((eno = ::pthread_mutex_unlock(mutex_)) != 0) {
-            ipc::error("fail pthread_mutex_unlock[%d]\n", eno);
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/semaphore_impl.h b/src/libipc/platform/posix/semaphore_impl.h
deleted file mode 100644
index d48bcd4b..00000000
--- a/src/libipc/platform/posix/semaphore_impl.h
+++ /dev/null
@@ -1,99 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-#include <fcntl.h>      /* For O_* constants */
-#include <sys/stat.h>   /* For mode constants */
-#include <semaphore.h>
-#include <errno.h>
-
-#include "libipc/utility/log.h"
-#include "libipc/shm.h"
-
-#include "get_wait_time.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class semaphore {
-    ipc::shm::handle shm_;
-    sem_t *h_ = SEM_FAILED;
-
-public:
-    semaphore() = default;
-    ~semaphore() noexcept = default;
-
-    sem_t *native() const noexcept {
-        return h_;
-    }
-
-    bool valid() const noexcept {
-        return h_ != SEM_FAILED;
-    }
-
-    bool open(char const *name, std::uint32_t count) noexcept {
-        close();
-        if (!shm_.acquire(name, 1)) {
-            ipc::error("[open_semaphore] fail shm.acquire: %s\n", name);
-            return false;
-        }
-        h_ = ::sem_open(name, O_CREAT, 0666, static_cast<unsigned>(count));
-        if (h_ == SEM_FAILED) {
-            ipc::error("fail sem_open[%d]: %s\n", errno, name);
-            return false;
-        }
-        return true;
-    }
-
-    void close() noexcept {
-        if (!valid()) return;
-        if (::sem_close(h_) != 0) {
-            ipc::error("fail sem_close[%d]: %s\n", errno);
-        }
-        h_ = SEM_FAILED;
-        if (shm_.name() != nullptr) {
-            std::string name = shm_.name();
-            if (shm_.release() <= 1) {
-                if (::sem_unlink(name.c_str()) != 0) {
-                    ipc::error("fail sem_unlink[%d]: %s, name: %s\n", errno, name.c_str());
-                }
-            }
-        }
-    }
-
-    bool wait(std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        if (tm == invalid_value) {
-            if (::sem_wait(h_) != 0) {
-                ipc::error("fail sem_wait[%d]: %s\n", errno);
-                return false;
-            }
-        } else {
-            auto ts = detail::make_timespec(tm);
-            if (::sem_timedwait(h_, &ts) != 0) {
-                if (errno != ETIMEDOUT) {
-                    ipc::error("fail sem_timedwait[%d]: tm = %zd, tv_sec = %ld, tv_nsec = %ld\n",
-                                errno, tm, ts.tv_sec, ts.tv_nsec);
-                }
-                return false;
-            }
-        }
-        return true;
-    }
-
-    bool post(std::uint32_t count) noexcept {
-        if (!valid()) return false;
-        for (std::uint32_t i = 0; i < count; ++i) {
-            if (::sem_post(h_) != 0) {
-                ipc::error("fail sem_post[%d]: %s\n", errno);
-                return false;
-            }
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/posix/shm_impl.h b/src/libipc/platform/posix/shm_impl.h
new file mode 100644
index 00000000..f335862e
--- /dev/null
+++ b/src/libipc/platform/posix/shm_impl.h
@@ -0,0 +1,171 @@
+/**
+ * \file libipc/platform/posix/shm_impl.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <string>
+#include <memory>   // std::unique_ptr
+#include <cstddef>
+
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+#include "libimp/detect_plat.h"
+
+#include "libipc/shm.h"
+
+#include "def.h"
+
+LIBIPC_NAMESPACE_BEG_
+using namespace ::LIBIMP;
+
+struct shm_handle {
+  std::string file;
+  std::size_t f_sz;
+  void *memp;
+};
+
+namespace {
+
+shm_handle *valid(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return nullptr;
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  if (shm->memp == nullptr) {
+    log.error("memory pointer is null.");
+    return nullptr;
+  }
+  return shm;
+}
+
+result<int> shm_open_fd(std::string const &name, mode::type type) noexcept {
+  LIBIMP_LOG_();
+  if (name.empty()) {
+    log.error("name is empty.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  // For portable use, a shared memory object should be identified by name of the form /somename.
+  // see: https://man7.org/linux/man-pages/man3/shm_open.3.html
+  std::string op_name = '/' + name;
+  // Open the object for read-write access.
+  int flag = O_RDWR;
+  switch (type) {
+  case mode::open:
+    break;
+  // The check for the existence of the object, 
+  // and its creation if it does not exist, are performed atomically.
+  case mode::create:
+    flag |= O_CREAT | O_EXCL;
+    break;
+  // Create the shared memory object if it does not exist.
+  case mode::open | mode::create:
+    flag |= O_CREAT;
+    break;
+  default:
+    log.error("mode type is invalid. type = ", type);
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+
+  // Create/Open POSIX shared memory bject.
+  int fd = ::shm_open(op_name.c_str(), flag, S_IRUSR | S_IWUSR |
+                                             S_IRGRP | S_IWGRP |
+                                             S_IROTH | S_IWOTH);
+  if (fd == posix::failed) {
+    auto err = sys::error();
+    log.error("failed: shm_open(name = ", op_name, 
+                             ", type = ", type, 
+                           "). error = ", err);
+    return err;
+  }
+  return fd;
+}
+
+result_code ftruncate_fd(int fd, std::size_t size) noexcept {
+  LIBIMP_LOG_();
+  /// \see https://man7.org/linux/man-pages/man3/ftruncate.3p.html
+  if (::ftruncate(fd, size) != posix::succ) {
+    auto err = sys::error();
+    log.error("failed: ftruncate(", fd, ", ", size, "). error = ", err);
+    return err;
+  }
+  return posix::succ;
+}
+
+} // namespace
+
+/**
+ * \see https://man7.org/linux/man-pages/man3/shm_open.3.html
+ *      https://man7.org/linux/man-pages/man3/fstat.3p.html
+ *      https://man7.org/linux/man-pages/man2/mmap.2.html
+ */
+result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
+  LIBIMP_LOG_();
+  auto fd = shm_open_fd(name, type);
+  if (!fd) {
+    return fd.error();
+  }
+  LIBIMP_UNUSED auto guard = std::unique_ptr<decltype(fd), void (*)(decltype(fd) *)> {
+    &fd, [](decltype(fd) *pfd) {
+      if (pfd != nullptr) ::close(**pfd);
+    }};
+
+  /// \brief Try to get the size of this fd
+  struct stat st;
+  if (::fstat(*fd, &st) == posix::failed) {
+    auto err = sys::error();
+    log.error("failed: fstat(fd = ", *fd, "). error = ", err);
+    return err;
+  }
+
+  /// \brief Truncate this fd to a specified length
+  if (size == 0) {
+    size = static_cast<std::size_t>(st.st_size);
+    auto ret = ftruncate_fd(*fd, size);
+    if (!ret) return ret.error();
+  } else if (st.st_size > 0) {
+    /// \remark Based on the actual size.
+    size = static_cast<std::size_t>(st.st_size);
+  } else { // st.st_size <= 0
+    auto ret = ftruncate_fd(*fd, size);
+    if (!ret) return ret.error();
+  }
+
+  /// \brief Creates a new mapping in the virtual address space of the calling process.
+  void *mem = ::mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_SHARED, *fd, 0);
+  if (mem == MAP_FAILED) {
+    auto err = sys::error();
+    log.error("failed: mmap(size = ", size, ", fd = ", *fd, "). error = ", err);
+    return err;
+  }
+  return new shm_handle{std::move(name), size, mem};
+}
+
+/**
+ * \see https://man7.org/linux/man-pages/man2/mmap.2.html
+ */
+result<void> shm_close(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  auto shm = valid(h);
+  if (shm == nullptr) {
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  if (::munmap(shm->memp, shm->f_sz) == posix::failed) {
+    auto err = sys::error();
+    log.error("failed: munmap(", shm->memp, ", ", shm->f_sz, "). error = ", err);
+    return err;
+  }
+  /// \brief no unlink the file.
+  delete shm;
+  return std::error_code{};
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/posix/shm_posix.cpp b/src/libipc/platform/posix/shm_posix.cpp
deleted file mode 100644
index 7f70b070..00000000
--- a/src/libipc/platform/posix/shm_posix.cpp
+++ /dev/null
@@ -1,197 +0,0 @@
-
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-
-#include <atomic>
-#include <string>
-#include <utility>
-#include <cstring>
-
-#include "libipc/shm.h"
-#include "libipc/def.h"
-#include "libipc/pool_alloc.h"
-
-#include "libipc/utility/log.h"
-#include "libipc/memory/resource.h"
-
-namespace {
-
-struct info_t {
-    std::atomic<std::int32_t> acc_;
-};
-
-struct id_info_t {
-    int         fd_   = -1;
-    void*       mem_  = nullptr;
-    std::size_t size_ = 0;
-    ipc::string name_;
-};
-
-constexpr std::size_t calc_size(std::size_t size) {
-    return ((((size - 1) / alignof(info_t)) + 1) * alignof(info_t)) + sizeof(info_t);
-}
-
-inline auto& acc_of(void* mem, std::size_t size) {
-    return reinterpret_cast<info_t*>(static_cast<ipc::byte_t*>(mem) + size - sizeof(info_t))->acc_;
-}
-
-} // internal-linkage
-
-namespace ipc {
-namespace shm {
-
-id_t acquire(char const * name, std::size_t size, unsigned mode) {
-    if (name == nullptr || name[0] == '\0') {
-        ipc::error("fail acquire: name is empty\n");
-        return nullptr;
-    }
-    ipc::string op_name = ipc::string{"__IPC_SHM__"} + name;
-    // Open the object for read-write access.
-    int flag = O_RDWR;
-    switch (mode) {
-    case open:
-        size = 0;
-        break;
-    // The check for the existence of the object, 
-    // and its creation if it does not exist, are performed atomically.
-    case create:
-        flag |= O_CREAT | O_EXCL;
-        break;
-    // Create the shared memory object if it does not exist.
-    default:
-        flag |= O_CREAT;
-        break;
-    }
-    int fd = ::shm_open(op_name.c_str(), flag, S_IRUSR | S_IWUSR |
-                                               S_IRGRP | S_IWGRP |
-                                               S_IROTH | S_IWOTH);
-    if (fd == -1) {
-        ipc::error("fail shm_open[%d]: %s\n", errno, name);
-        return nullptr;
-    }
-    auto ii = mem::alloc<id_info_t>();
-    ii->fd_   = fd;
-    ii->size_ = size;
-    ii->name_ = std::move(op_name);
-    return ii;
-}
-
-std::int32_t get_ref(id_t id) {
-    if (id == nullptr) {
-        return 0;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ == nullptr || ii->size_ == 0) {
-        return 0;
-    }
-    return acc_of(ii->mem_, ii->size_).load(std::memory_order_acquire);
-}
-
-void sub_ref(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail sub_ref: invalid id (null)\n");
-        return;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ == nullptr || ii->size_ == 0) {
-        ipc::error("fail sub_ref: invalid id (mem = %p, size = %zd)\n", ii->mem_, ii->size_);
-        return;
-    }
-    acc_of(ii->mem_, ii->size_).fetch_sub(1, std::memory_order_acq_rel);
-}
-
-void * get_mem(id_t id, std::size_t * size) {
-    if (id == nullptr) {
-        ipc::error("fail get_mem: invalid id (null)\n");
-        return nullptr;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ != nullptr) {
-        if (size != nullptr) *size = ii->size_;
-        return ii->mem_;
-    }
-    int fd = ii->fd_;
-    if (fd == -1) {
-        ipc::error("fail get_mem: invalid id (fd = -1)\n");
-        return nullptr;
-    }
-    if (ii->size_ == 0) {
-        struct stat st;
-        if (::fstat(fd, &st) != 0) {
-            ipc::error("fail fstat[%d]: %s, size = %zd\n", errno, ii->name_.c_str(), ii->size_);
-            return nullptr;
-        }
-        ii->size_ = static_cast<std::size_t>(st.st_size);
-        if ((ii->size_ <= sizeof(info_t)) || (ii->size_ % sizeof(info_t))) {
-            ipc::error("fail get_mem: %s, invalid size = %zd\n", ii->name_.c_str(), ii->size_);
-            return nullptr;
-        }
-    }
-    else {
-        ii->size_ = calc_size(ii->size_);
-        if (::ftruncate(fd, static_cast<off_t>(ii->size_)) != 0) {
-            ipc::error("fail ftruncate[%d]: %s, size = %zd\n", errno, ii->name_.c_str(), ii->size_);
-            return nullptr;
-        }
-    }
-    void* mem = ::mmap(nullptr, ii->size_, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-    if (mem == MAP_FAILED) {
-        ipc::error("fail mmap[%d]: %s, size = %zd\n", errno, ii->name_.c_str(), ii->size_);
-        return nullptr;
-    }
-    ::close(fd);
-    ii->fd_  = -1;
-    ii->mem_ = mem;
-    if (size != nullptr) *size = ii->size_;
-    acc_of(mem, ii->size_).fetch_add(1, std::memory_order_release);
-    return mem;
-}
-
-std::int32_t release(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail release: invalid id (null)\n");
-        return -1;
-    }
-    std::int32_t ret = -1;
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ == nullptr || ii->size_ == 0) {
-        ipc::error("fail release: invalid id (mem = %p, size = %zd)\n", ii->mem_, ii->size_);
-    }
-    else if ((ret = acc_of(ii->mem_, ii->size_).fetch_sub(1, std::memory_order_acq_rel)) <= 1) {
-        ::munmap(ii->mem_, ii->size_);
-        if (!ii->name_.empty()) {
-            ::shm_unlink(ii->name_.c_str());
-        }
-    }
-    else ::munmap(ii->mem_, ii->size_);
-    mem::free(ii);
-    return ret;
-}
-
-void remove(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail remove: invalid id (null)\n");
-        return;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    auto name = std::move(ii->name_);
-    release(id);
-    if (!name.empty()) {
-        ::shm_unlink(name.c_str());
-    }
-}
-
-void remove(char const * name) {
-    if (name == nullptr || name[0] == '\0') {
-        ipc::error("fail remove: name is empty\n");
-        return;
-    }
-    ::shm_unlink((ipc::string{"__IPC_SHM__"} + name).c_str());
-}
-
-} // namespace shm
-} // namespace ipc
diff --git a/src/libipc/platform/win/api.h b/src/libipc/platform/win/api.h
new file mode 100644
index 00000000..67162bca
--- /dev/null
+++ b/src/libipc/platform/win/api.h
@@ -0,0 +1,344 @@
+/**
+ * \file libipc/platform/win/api.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <Windows.h>
+#include <securitybaseapi.h>
+#include <tchar.h>
+
+#include <string>
+#include <cstddef>
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+#include "libimp/codecvt.h"
+#include "libimp/span.h"
+#include "libimp/detect_plat.h"
+
+#include "libipc/def.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+using namespace ::LIBIMP;
+
+namespace winapi {
+
+using tstring = std::basic_string<TCHAR>;
+
+inline tstring to_tstring(std::string const &str) {
+  tstring des;
+  ::LIBIMP::cvt_sstr(str, des);
+  return des;
+}
+
+/**
+ * \brief Creates or opens a SECURITY_ATTRIBUTES structure singleton
+ * \see https://docs.microsoft.com/en-us/previous-versions/windows/desktop/legacy/aa379560(v=vs.85)
+ */
+inline LPSECURITY_ATTRIBUTES get_security_descriptor() {
+  static struct initiator {
+
+    SECURITY_DESCRIPTOR sd_;
+    SECURITY_ATTRIBUTES sa_;
+
+    bool succ_ = false;
+
+    initiator() {
+      using namespace ::LIBIMP;
+      LIBIMP_LOG_("get_security_descriptor");
+      if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
+        log.error("failed: InitializeSecurityDescriptor(SECURITY_DESCRIPTOR_REVISION). "
+                  "error = ", sys::error());
+        return;
+      }
+      if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
+        log.error("failed: SetSecurityDescriptorDacl. error = ", sys::error());
+        return;
+      }
+      sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
+      sa_.bInheritHandle = FALSE;
+      sa_.lpSecurityDescriptor = &sd_;
+      succ_ = true;
+    }
+  } handle;
+  return handle.succ_ ? &handle.sa_ : nullptr;
+}
+
+/**
+ * \brief Closes an open object handle.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/handleapi/nf-handleapi-closehandle
+ */
+inline result<void> close_handle(HANDLE h) noexcept {
+  LIBIMP_LOG_();
+  if (h == NULL) {
+    log.error("handle is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  if (!::CloseHandle(h)) {
+    auto err = sys::error();
+    log.error("failed: CloseHandle(", h, "). error = ", err);
+    return err;
+  }
+  return std::error_code{};
+}
+
+/**
+ * \brief Creates or opens a file mapping object for a specified file.
+ * 
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-openfilemappinga
+ *      https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-createfilemappinga
+ * 
+ * \param file Specifies the name of the file mapping object.
+ * \param size Specifies the size required to create a file mapping object.
+ *             This size is ignored when opening an existing file mapping object.
+ * \param type Combinable open modes, create | open.
+ * 
+ * \return File mapping object HANDLE, NULL on error.
+ */
+inline result<HANDLE> open_file_mapping(std::string const &file, std::size_t size, mode::type type) noexcept {
+  LIBIMP_LOG_();
+  if (file.empty()) {
+    log.error("file name is empty.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  auto t_name = winapi::to_tstring(file);
+  if (t_name.empty()) {
+    log.error("file name is empty. (TCHAR conversion failed)");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+
+  // Opens a named file mapping object.
+  auto try_open = [&]() -> result<HANDLE> {
+    HANDLE h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, t_name.c_str());
+    if (h == NULL) {
+      auto err = sys::error();
+      log.error("failed: OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, ", file, "). error = ", err);
+      return err;
+    }
+    return h;
+  };
+
+  // Creates or opens a named or unnamed file mapping object for a specified file.
+  auto try_create = [&]() -> result<HANDLE> {
+    HANDLE h = ::CreateFileMapping(INVALID_HANDLE_VALUE, winapi::get_security_descriptor(), PAGE_READWRITE | SEC_COMMIT,
+                                   /// \remark dwMaximumSizeHigh always 0 here.
+                                   0, static_cast<DWORD>(size), t_name.c_str());
+    if (h == NULL) {
+      auto err = sys::error();
+      log.error("failed: CreateFileMapping(PAGE_READWRITE | SEC_COMMIT, ", size, ", ", file, "). error = ", err);
+      return err;
+    }
+    return h;
+  };
+
+  if (type == mode::open) {
+    return try_open();
+  } else if ((type == (mode::create | mode::open)) && (size == 0)) {
+    /// \remark CreateFileMapping may returns ERROR_INVALID_PARAMETER when dwMaximumSizeLow is zero.
+    /// \see CreateFileMapping (Windows CE 5.0)
+    ///      https://learn.microsoft.com/en-us/previous-versions/windows/embedded/aa517331(v=msdn.10)
+    return try_open();
+  } else if (!(type & mode::create)) {
+    log.error("mode type is invalid. type = ", type);
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  auto h = try_create();
+  if (!h) return h;
+  /// \remark If the object exists before the function call, the function returns a handle to the existing object
+  ///         (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
+  if ((type == mode::create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
+    log.info("the file being created already exists. file = ", file, ", type = ", type);
+    winapi::close_handle(*h);
+    return sys::error();
+  }
+  return h;
+}
+
+/**
+ * \brief Maps a view of a file mapping into the address space of a calling process.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-mapviewoffile
+ */
+inline result<LPVOID> address_of_file_mapping(HANDLE h) {
+  LIBIMP_LOG_();
+  if (h == NULL) {
+    log.error("handle is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  LPVOID mem = ::MapViewOfFile(h, FILE_MAP_ALL_ACCESS, 0, 0, 0);
+  if (mem == NULL) {
+    auto err = sys::error();
+    log.error("failed: MapViewOfFile(", h, ", FILE_MAP_ALL_ACCESS). error = ", err);
+    return err;
+  }
+  return mem;
+}
+
+/**
+ * \brief Retrieves the size about a range of pages in the virtual address space of the calling process.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-virtualquery
+ */
+inline result<SIZE_T> region_size_of_address(LPCVOID mem) {
+  LIBIMP_LOG_();
+  if (mem == NULL) {
+    log.error("memory pointer is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  MEMORY_BASIC_INFORMATION mem_info {};
+  if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
+    auto err = sys::error();
+    log.error("failed: VirtualQuery(", mem, "). error = ", err);
+    return err;
+  }
+  return mem_info.RegionSize;
+}
+
+/**
+ * \brief Unmaps a mapped view of a file from the calling process's address space.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/memoryapi/nf-memoryapi-unmapviewoffile
+ */
+inline result<void> close_file_mapping(HANDLE h, LPCVOID mem) {
+  LIBIMP_LOG_();
+  if (h == NULL) {
+    log.error("handle is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  if (mem == NULL) {
+    log.error("memory pointer is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  if (!::UnmapViewOfFile(mem)) {
+    log.warning("failed: UnmapViewOfFile. error = ", sys::error());
+  }
+  return winapi::close_handle(h);
+}
+
+enum class wait_result {
+  object_0,
+  abandoned,
+  timeout
+};
+
+LIBIMP_INLINE_CONSTEXPR std::int64_t const infinite_time = -1;
+
+/**
+ * \brief Waits until the specified object is in the signaled state or the time-out interval elapses.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
+ */
+inline result<wait_result> wait_for_single_object(HANDLE h, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
+  DWORD r = ::WaitForSingleObject(h, dwMilliseconds);
+  if (r == WAIT_FAILED) {
+    auto err = sys::error();
+    log.error("failed: WaitForSingleObject(", h, ", ", dwMilliseconds, "). error = ", err);
+    return err;
+  }
+  if (r == WAIT_OBJECT_0) {
+    return wait_result::object_0;
+  }
+  if (r == WAIT_ABANDONED) {
+    return wait_result::abandoned;
+  }
+  return wait_result::timeout;
+}
+
+/**
+ * \brief Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitformultipleobjects
+ */
+inline result<wait_result> wait_for_multiple_objects(span<HANDLE const> handles, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  DWORD dwMilliseconds = (ms < 0) ? INFINITE : static_cast<DWORD>(ms);
+  DWORD r = ::WaitForMultipleObjects(static_cast<DWORD>(handles.size()), handles.data(), FALSE, dwMilliseconds);
+  if (r == WAIT_FAILED) {
+    auto err = sys::error();
+    log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", dwMilliseconds, "). error = ", err);
+    return err;
+  }
+  if ((r >= WAIT_OBJECT_0) && (r < WAIT_OBJECT_0 + handles.size())) {
+    return wait_result::object_0;
+  }
+  if ((r >= WAIT_ABANDONED_0) && (r < WAIT_ABANDONED_0 + handles.size())) {
+    return wait_result::abandoned;
+  }
+  return wait_result::timeout;
+}
+
+/**
+ * \brief Retrieves the current value of the performance counter, 
+ *        which is a high resolution (<1us) time stamp that can be used for time-interval measurements.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/profileapi/nf-profileapi-queryperformancecounter
+ */
+inline result<std::int64_t> query_performance_counter() noexcept {
+  LIBIMP_LOG_();
+  std::int64_t pc;
+  BOOL r = ::QueryPerformanceCounter(reinterpret_cast<LARGE_INTEGER *>(&pc));
+  if (!r) {
+    auto err = sys::error();
+    log.error("failed: QueryPerformanceCounter(). error = ", err);
+    return err;
+  }
+  return pc;
+}
+
+/**
+ * \brief Creates or opens a named or unnamed mutex object.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createmutexa
+ * \return Mutex object HANDLE, NULL on error.
+ */
+inline result<HANDLE> open_mutex(char const *name, bool initial_owner) noexcept {
+  LIBIMP_LOG_();
+  HANDLE h = ::CreateMutexA(winapi::get_security_descriptor(), initial_owner, name);
+  if (h == NULL) {
+    auto err = sys::error();
+    log.error("failed: CreateMutexA(", initial_owner, ", ", name, "). error = ", err);
+    return err;
+  }
+  return h;
+}
+
+/**
+ * \brief Releases ownership of the specified mutex object.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-releasemutex
+*/
+inline result<bool> release_mutex(HANDLE h) noexcept {
+  LIBIMP_LOG_();
+  if (::ReleaseMutex(h)) {
+    return true;
+  }
+  auto err = sys::error();
+  log.error("failed: ReleaseMutex. error = ", err);
+  return err;
+}
+
+/**
+ * \brief Locks the mutex, blocks if the mutex is not available.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
+*/
+inline result<bool> wait_mutex(HANDLE h, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  // If the mutex is abandoned, we need to release it and try again.
+  for (;;) {
+    auto r = winapi::wait_for_single_object(h, ms);
+    if (!r) {
+      return r.error();
+    }
+    if (*r == winapi::wait_result::object_0) {
+      return true;
+    }
+    if (*r == winapi::wait_result::abandoned) {
+      log.info("failed: WaitForSingleObject(", ms, "). The mutex is abandoned, try again.");
+      auto rr = release_mutex(h);
+      if (rr) {
+        continue;
+      }
+      return rr.error();
+    }
+    return false;
+  }
+}
+
+} // namespace winapi
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/condition.h b/src/libipc/platform/win/condition.h
deleted file mode 100644
index e477bff0..00000000
--- a/src/libipc/platform/win/condition.h
+++ /dev/null
@@ -1,119 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <string>
-#include <mutex>
-
-#include <Windows.h>
-
-#include "libipc/utility/log.h"
-#include "libipc/utility/scope_guard.h"
-#include "libipc/platform/detail.h"
-#include "libipc/mutex.h"
-#include "libipc/semaphore.h"
-#include "libipc/shm.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class condition {
-    ipc::sync::semaphore sem_;
-    ipc::sync::mutex lock_;
-    ipc::shm::handle shm_;
-
-    std::int32_t &counter() {
-        return *static_cast<std::int32_t *>(shm_.get());
-    }
-
-public:
-    condition() = default;
-    ~condition() noexcept = default;
-
-    auto native() noexcept {
-        return sem_.native();
-    }
-
-    auto native() const noexcept {
-        return sem_.native();
-    }
-
-    bool valid() const noexcept {
-        return sem_.valid() && lock_.valid() && shm_.valid();
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        if (!sem_.open((std::string{"_cond_sem_"} + name).c_str())) {
-            return false;
-        }
-        auto finally_sem = ipc::guard([this] { sem_.close(); }); // close when failed
-        if (!lock_.open((std::string{"_cond_lock_"} + name).c_str())) {
-            return false;
-        }
-        auto finally_lock = ipc::guard([this] { lock_.close(); }); // close when failed
-        if (!shm_.acquire((std::string{"_cond_shm_"} + name).c_str(), sizeof(std::int32_t))) {
-            return false;
-        }
-        finally_lock.dismiss();
-        finally_sem.dismiss();
-        return valid();
-    }
-
-    void close() noexcept {
-        if (!valid()) return;
-        sem_.close();
-        lock_.close();
-        shm_.release();
-    }
-
-    bool wait(ipc::sync::mutex &mtx, std::uint64_t tm) noexcept {
-        if (!valid()) return false;
-        auto &cnt = counter();
-        {
-            IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_};
-            cnt = (cnt < 0) ? 1 : cnt + 1;
-        }
-        DWORD ms = (tm == invalid_value) ? INFINITE : static_cast<DWORD>(tm);
-        /**
-         * @see
-         *  - https://www.microsoft.com/en-us/research/wp-content/uploads/2004/12/ImplementingCVs.pdf
-         *  - https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-signalobjectandwait
-        */
-        bool rs = ::SignalObjectAndWait(mtx.native(), sem_.native(), ms, FALSE) == WAIT_OBJECT_0;
-        bool rl = mtx.lock(); // INFINITE
-        if (!rs) {
-            IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_};
-            cnt -= 1;
-        }
-        return rs && rl;
-    }
-
-    bool notify(ipc::sync::mutex &) noexcept {
-        if (!valid()) return false;
-        auto &cnt = counter();
-        if (!lock_.lock()) return false;
-        bool ret = false;
-        if (cnt > 0) {
-            ret = sem_.post(1);
-            cnt -= 1;
-        }
-        return lock_.unlock() && ret;
-    }
-
-    bool broadcast(ipc::sync::mutex &) noexcept {
-        if (!valid()) return false;
-        auto &cnt = counter();
-        if (!lock_.lock()) return false;
-        bool ret = false;
-        if (cnt > 0) {
-            ret = sem_.post(cnt);
-            cnt = 0;
-        }
-        return lock_.unlock() && ret;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/win/event_impl.h b/src/libipc/platform/win/event_impl.h
new file mode 100644
index 00000000..4265f1bf
--- /dev/null
+++ b/src/libipc/platform/win/event_impl.h
@@ -0,0 +1,146 @@
+/**
+ * \file libipc/platform/win/event_impl.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <string>
+#include <memory>
+#include <vector>
+#include <cstddef>
+
+#include "libimp/log.h"
+#include "libpmr/new.h"
+#include "libipc/event.h"
+
+#include "api.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+using namespace ::LIBIMP;
+using namespace ::LIBPMR;
+
+struct evt_handle {
+  std::string name;
+  HANDLE h_event;
+};
+
+namespace {
+
+bool is_valid(evt_t evt) noexcept {
+  return (evt != nullptr) && (evt->h_event != NULL);
+}
+
+} // namespace
+
+/**
+ * \brief Creates or opens a named event object.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createeventa
+ * \param name The name of the event object. The name is limited to MAX_PATH characters. Name comparison is case sensitive.
+ * \return A handle to the event object, NULL on error.
+ */
+result<evt_t> evt_open(std::string name) noexcept {
+  LIBIMP_LOG_();
+  auto t_name = winapi::to_tstring(name);
+  auto h = ::CreateEvent(winapi::get_security_descriptor(), 
+                        /*bManualReset*/ FALSE, 
+                        /*bInitialState*/FALSE, 
+                        /*lpName*/       t_name.c_str());
+  if (h == NULL) {
+    auto err = sys::error();
+    log.error("failed: CreateEvent(FALSE, FALSE, ", name, "). error = ", err);
+    return err;
+  }
+  return $new<evt_handle>(std::move(name), h);
+}
+
+/**
+ * \brief Closes an open event object handle.
+ */
+result<void> evt_close(evt_t evt) noexcept {
+  LIBIMP_LOG_();
+  LIBIMP_UNUSED auto guard = std::unique_ptr<evt_handle, deleter>(evt);
+  if (!is_valid(evt)) {
+    log.error("handle is null.");
+    return {};
+  }
+  return winapi::close_handle(evt->h_event);
+}
+
+/**
+ * \brief Sets the specified event object to the signaled state.
+ * \see https://docs.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-setevent
+ */
+result<void> evt_set(evt_t evt) noexcept {
+  LIBIMP_LOG_();
+  if (!is_valid(evt)) {
+    log.error("handle is null.");
+    return {};
+  }
+  if (!::SetEvent(evt->h_event)) {
+    auto err = sys::error();
+    log.error("failed: SetEvent(", evt->h_event, "). error = ", err);
+    return err;
+  }
+  return std::error_code{};
+}
+
+/**
+ * \brief Waits until the specified object is in the signaled state or the time-out interval elapses.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitforsingleobject
+ */
+result<bool> evt_wait(evt_t evt, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  if (!is_valid(evt)) {
+    log.error("handle is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  auto r = winapi::wait_for_single_object(evt->h_event, ms);
+  if (!r) {
+    return r.error();
+  }
+  if (*r == winapi::wait_result::object_0) {
+    return true;
+  }
+  if (*r == winapi::wait_result::abandoned) {
+    log.error("failed: WaitForSingleObject(", evt->h_event, ", ", ms, "). error = WAIT_ABANDONED");
+    return false;
+  }
+  return false;
+}
+
+/**
+ * \brief Waits until one or all of the specified objects are in the signaled state or the time-out interval elapses.
+ * \see https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-waitformultipleobjects
+ */
+result<bool> evt_wait(::LIBIMP::span<evt_t const> evts, std::int64_t ms) noexcept {
+  LIBIMP_LOG_();
+  if (evts.empty()) {
+    log.error("evts handle is empty.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  // Conversion of the event handle array to the windows handle array.
+  std::vector<HANDLE> handles(evts.size());
+  for (std::size_t i = 0; i < evts.size(); ++i) {
+    if (!is_valid(evts[i])) {
+      log.error("handle is null.");
+      return std::make_error_code(std::errc::invalid_argument);
+    }
+    handles[i] = evts[i]->h_event;
+  }
+  // Wait for the events.
+  auto r = winapi::wait_for_multiple_objects(handles, ms);
+  if (!r) {
+    return r.error();
+  }
+  if (*r == winapi::wait_result::object_0) {
+    return true;
+  }
+  if (*r == winapi::wait_result::abandoned) {
+    log.error("failed: WaitForMultipleObjects(", handles.size(), ", ", ms, "). error = WAIT_ABANDONED");
+    return false;
+  }
+  return false;
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/get_sa.h b/src/libipc/platform/win/get_sa.h
deleted file mode 100644
index 74b68d4f..00000000
--- a/src/libipc/platform/win/get_sa.h
+++ /dev/null
@@ -1,35 +0,0 @@
-#pragma once
-
-#include <securitybaseapi.h>
-
-namespace ipc {
-namespace detail {
-
-inline LPSECURITY_ATTRIBUTES get_sa() {
-    static struct initiator {
-
-        SECURITY_DESCRIPTOR sd_;
-        SECURITY_ATTRIBUTES sa_;
-
-        bool succ_ = false;
-
-        initiator() {
-            if (!::InitializeSecurityDescriptor(&sd_, SECURITY_DESCRIPTOR_REVISION)) {
-                ipc::error("fail InitializeSecurityDescriptor[%d]\n", static_cast<int>(::GetLastError()));
-                return;
-            }
-            if (!::SetSecurityDescriptorDacl(&sd_, TRUE, NULL, FALSE)) {
-                ipc::error("fail SetSecurityDescriptorDacl[%d]\n", static_cast<int>(::GetLastError()));
-                return;
-            }
-            sa_.nLength = sizeof(SECURITY_ATTRIBUTES);
-            sa_.bInheritHandle = FALSE;
-            sa_.lpSecurityDescriptor = &sd_;
-            succ_ = true;
-        }
-    } handle;
-    return handle.succ_ ? &handle.sa_ : nullptr;
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/win/mutex.h b/src/libipc/platform/win/mutex.h
deleted file mode 100644
index 68968c48..00000000
--- a/src/libipc/platform/win/mutex.h
+++ /dev/null
@@ -1,96 +0,0 @@
-#pragma once
-
-#include <cstdint>
-#include <system_error>
-
-#include <Windows.h>
-
-#include "libipc/utility/log.h"
-
-#include "to_tchar.h"
-#include "get_sa.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class mutex {
-    HANDLE h_ = NULL;
-
-public:
-    mutex() noexcept = default;
-    ~mutex() noexcept = default;
-
-    HANDLE native() const noexcept {
-        return h_;
-    }
-
-    bool valid() const noexcept {
-        return h_ != NULL;
-    }
-
-    bool open(char const *name) noexcept {
-        close();
-        h_ = ::CreateMutex(detail::get_sa(), FALSE, ipc::detail::to_tchar(name).c_str());
-        if (h_ == NULL) {
-            ipc::error("fail CreateMutex[%lu]: %s\n", ::GetLastError(), name);
-            return false;
-        }
-        return true;
-    }
-
-    void close() noexcept {
-        if (!valid()) return;
-        ::CloseHandle(h_);
-        h_ = NULL;
-    }
-
-    bool lock(std::uint64_t tm) noexcept {
-        DWORD ret, ms = (tm == invalid_value) ? INFINITE : static_cast<DWORD>(tm);
-        for(;;) {
-            switch ((ret = ::WaitForSingleObject(h_, ms))) {
-            case WAIT_OBJECT_0:
-                return true;
-            case WAIT_TIMEOUT:
-                return false;
-            case WAIT_ABANDONED:
-                ipc::log("fail WaitForSingleObject[%lu]: WAIT_ABANDONED, try again.\n", ::GetLastError());
-                if (!unlock()) {
-                    return false;
-                }
-                break; // loop again
-            default:
-                ipc::error("fail WaitForSingleObject[%lu]: 0x%08X\n", ::GetLastError(), ret);
-                return false;
-            }
-        }
-    }
-
-    bool try_lock() noexcept(false) {
-        DWORD ret = ::WaitForSingleObject(h_, 0);
-        switch (ret) {
-        case WAIT_OBJECT_0:
-            return true;
-        case WAIT_TIMEOUT:
-            return false;
-        case WAIT_ABANDONED:
-            unlock();
-            IPC_FALLTHROUGH_;
-        default:
-            ipc::error("fail WaitForSingleObject[%lu]: 0x%08X\n", ::GetLastError(), ret);
-            throw std::system_error{static_cast<int>(ret), std::system_category()};
-        }
-    }
-
-    bool unlock() noexcept {
-        if (!::ReleaseMutex(h_)) {
-            ipc::error("fail ReleaseMutex[%lu]\n", ::GetLastError());
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/win/mutex_impl.h b/src/libipc/platform/win/mutex_impl.h
new file mode 100644
index 00000000..5fd6df8f
--- /dev/null
+++ b/src/libipc/platform/win/mutex_impl.h
@@ -0,0 +1,28 @@
+/**
+ * \file libipc/platform/win/mutex_impl.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+#include "libpmr/new.h"
+#include "libipc/mutex.h"
+
+#include "api.h"
+#include "sync_id.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+using namespace ::LIBIMP;
+using namespace ::LIBPMR;
+
+struct mutex_handle {
+
+};
+
+result<mutex_t> mutex_open(span<::LIBIMP::byte> mem) noexcept {
+  return {};
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/semaphore.h b/src/libipc/platform/win/semaphore.h
deleted file mode 100644
index 47fd45d1..00000000
--- a/src/libipc/platform/win/semaphore.h
+++ /dev/null
@@ -1,74 +0,0 @@
-#pragma once
-
-#include <cstdint>
-
-#include <Windows.h>
-
-#include "libipc/utility/log.h"
-
-#include "to_tchar.h"
-#include "get_sa.h"
-
-namespace ipc {
-namespace detail {
-namespace sync {
-
-class semaphore {
-    HANDLE h_ = NULL;
-
-public:
-    semaphore() noexcept = default;
-    ~semaphore() noexcept = default;
-
-    HANDLE native() const noexcept {
-        return h_;
-    }
-
-    bool valid() const noexcept {
-        return h_ != NULL;
-    }
-
-    bool open(char const *name, std::uint32_t count) noexcept {
-        close();
-        h_ = ::CreateSemaphore(detail::get_sa(), 
-                               static_cast<LONG>(count), LONG_MAX, 
-                               ipc::detail::to_tchar(name).c_str());
-        if (h_ == NULL) {
-            ipc::error("fail CreateSemaphore[%lu]: %s\n", ::GetLastError(), name);
-            return false;
-        }
-        return true;
-    }
-
-    void close() noexcept {
-        if (!valid()) return;
-        ::CloseHandle(h_);
-        h_ = NULL;
-    }
-
-    bool wait(std::uint64_t tm) noexcept {
-        DWORD ret, ms = (tm == invalid_value) ? INFINITE : static_cast<DWORD>(tm);
-        switch ((ret = ::WaitForSingleObject(h_, ms))) {
-        case WAIT_OBJECT_0:
-            return true;
-        case WAIT_TIMEOUT:
-            return false;
-        case WAIT_ABANDONED:
-        default:
-            ipc::error("fail WaitForSingleObject[%lu]: 0x%08X\n", ::GetLastError(), ret);
-            return false;
-        }
-    }
-
-    bool post(std::uint32_t count) noexcept {
-        if (!::ReleaseSemaphore(h_, static_cast<LONG>(count), NULL)) {
-            ipc::error("fail ReleaseSemaphore[%lu]\n", ::GetLastError());
-            return false;
-        }
-        return true;
-    }
-};
-
-} // namespace sync
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/platform/win/shm_impl.h b/src/libipc/platform/win/shm_impl.h
new file mode 100644
index 00000000..9b561340
--- /dev/null
+++ b/src/libipc/platform/win/shm_impl.h
@@ -0,0 +1,63 @@
+/**
+ * \file libipc/platform/win/shm_impl.h
+ * \author mutouyun (orz@orzz.org)
+ */
+#pragma once
+
+#include <string>
+#include <cstddef>
+
+#include "libimp/log.h"
+#include "libimp/system.h"
+#include "libpmr/new.h"
+#include "libipc/shm.h"
+
+#include "api.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+using namespace ::LIBIMP;
+using namespace ::LIBPMR;
+
+struct shm_handle {
+  std::string file;
+  std::size_t f_sz;
+  void *memp;
+  HANDLE h_fmap;
+};
+
+result<shm_t> shm_open(std::string name, std::size_t size, mode::type type) noexcept {
+  LIBIMP_LOG_();
+  auto h = winapi::open_file_mapping(name, size, type);
+  if (*h == NULL) {
+    log.error("failed: OpenFileMapping(name = ", name, ", size = ", size, ", type = ", type, ").");
+    return h.error();
+  }
+  auto mem = winapi::address_of_file_mapping(*h);
+  if (*mem == NULL) {
+    log.error("failed: MapViewOfFile(", *h, ").");
+    winapi::close_handle(*h);
+    return mem.error();
+  }
+  auto sz = winapi::region_size_of_address(*mem);
+  if (!sz) {
+    log.error("failed: RegionSizeOfMemory(", *mem, ").");
+    winapi::close_handle(*h);
+    return sz.error();
+  }
+  return $new<shm_handle>(std::move(name), *sz, *mem, *h);
+}
+
+result<void> shm_close(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return std::make_error_code(std::errc::invalid_argument);
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  auto ret = winapi::close_file_mapping(shm->h_fmap, shm->memp);
+  $delete(shm);
+  return ret;
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/platform/win/shm_win.cpp b/src/libipc/platform/win/shm_win.cpp
deleted file mode 100755
index 366e8bd1..00000000
--- a/src/libipc/platform/win/shm_win.cpp
+++ /dev/null
@@ -1,135 +0,0 @@
-
-#include <Windows.h>
-
-#include <string>
-#include <utility>
-
-#include "libipc/shm.h"
-#include "libipc/def.h"
-#include "libipc/pool_alloc.h"
-
-#include "libipc/utility/log.h"
-#include "libipc/memory/resource.h"
-
-#include "to_tchar.h"
-#include "get_sa.h"
-
-namespace {
-
-struct id_info_t {
-    HANDLE      h_    = NULL;
-    void*       mem_  = nullptr;
-    std::size_t size_ = 0;
-};
-
-} // internal-linkage
-
-namespace ipc {
-namespace shm {
-
-id_t acquire(char const * name, std::size_t size, unsigned mode) {
-    if (name == nullptr || name[0] == '\0') {
-        ipc::error("fail acquire: name is empty\n");
-        return nullptr;
-    }
-    HANDLE h;
-    auto fmt_name = ipc::detail::to_tchar(ipc::string{"__IPC_SHM__"} + name);
-    // Opens a named file mapping object.
-    if (mode == open) {
-        h = ::OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, fmt_name.c_str());
-    }
-    // Creates or opens a named file mapping object for a specified file.
-    else {
-        h = ::CreateFileMapping(INVALID_HANDLE_VALUE, detail::get_sa(), PAGE_READWRITE | SEC_COMMIT,
-                                0, static_cast<DWORD>(size), fmt_name.c_str());
-        // If the object exists before the function call, the function returns a handle to the existing object 
-        // (with its current size, not the specified size), and GetLastError returns ERROR_ALREADY_EXISTS.
-        if ((mode == create) && (::GetLastError() == ERROR_ALREADY_EXISTS)) {
-            ::CloseHandle(h);
-            h = NULL;
-        }
-    }
-    if (h == NULL) {
-        ipc::error("fail CreateFileMapping/OpenFileMapping[%d]: %s\n", static_cast<int>(::GetLastError()), name);
-        return nullptr;
-    }
-    auto ii = mem::alloc<id_info_t>();
-    ii->h_    = h;
-    ii->size_ = size;
-    return ii;
-}
-
-std::int32_t get_ref(id_t) {
-    return 0;
-}
-
-void sub_ref(id_t) {
-    // Do Nothing.
-}
-
-void * get_mem(id_t id, std::size_t * size) {
-    if (id == nullptr) {
-        ipc::error("fail get_mem: invalid id (null)\n");
-        return nullptr;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ != nullptr) {
-        if (size != nullptr) *size = ii->size_;
-        return ii->mem_;
-    }
-    if (ii->h_ == NULL) {
-        ipc::error("fail to_mem: invalid id (h = null)\n");
-        return nullptr;
-    }
-    LPVOID mem = ::MapViewOfFile(ii->h_, FILE_MAP_ALL_ACCESS, 0, 0, 0);
-    if (mem == NULL) {
-        ipc::error("fail MapViewOfFile[%d]\n", static_cast<int>(::GetLastError()));
-        return nullptr;
-    }
-    MEMORY_BASIC_INFORMATION mem_info;
-    if (::VirtualQuery(mem, &mem_info, sizeof(mem_info)) == 0) {
-        ipc::error("fail VirtualQuery[%d]\n", static_cast<int>(::GetLastError()));
-        return nullptr;
-    }
-    ii->mem_  = mem;
-    ii->size_ = static_cast<std::size_t>(mem_info.RegionSize);
-    if (size != nullptr) *size = ii->size_;
-    return static_cast<void *>(mem);
-}
-
-std::int32_t release(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail release: invalid id (null)\n");
-        return -1;
-    }
-    auto ii = static_cast<id_info_t*>(id);
-    if (ii->mem_ == nullptr || ii->size_ == 0) {
-        ipc::error("fail release: invalid id (mem = %p, size = %zd)\n", ii->mem_, ii->size_);
-    }
-    else ::UnmapViewOfFile(static_cast<LPCVOID>(ii->mem_));
-    if (ii->h_ == NULL) {
-        ipc::error("fail release: invalid id (h = null)\n");
-    }
-    else ::CloseHandle(ii->h_);
-    mem::free(ii);
-    return 0;
-}
-
-void remove(id_t id) {
-    if (id == nullptr) {
-        ipc::error("fail release: invalid id (null)\n");
-        return;
-    }
-    release(id);
-}
-
-void remove(char const * name) {
-    if (name == nullptr || name[0] == '\0') {
-        ipc::error("fail remove: name is empty\n");
-        return;
-    }
-    // Do Nothing.
-}
-
-} // namespace shm
-} // namespace ipc
diff --git a/src/libipc/platform/win/to_tchar.h b/src/libipc/platform/win/to_tchar.h
deleted file mode 100755
index 892177e2..00000000
--- a/src/libipc/platform/win/to_tchar.h
+++ /dev/null
@@ -1,74 +0,0 @@
-#pragma once
-
-#include <Windows.h>
-
-#include <type_traits>
-#include <string>
-#include <locale>
-#include <codecvt>
-#include <cstring>
-#include <stdexcept>
-#include <cstddef>
-
-#include "libipc/utility/concept.h"
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace detail {
-
-struct has_value_type_ {
-    template <typename T> static std::true_type  check(typename T::value_type *);
-    template <typename T> static std::false_type check(...);
-};
-
-template <typename T, typename U, typename = decltype(has_value_type_::check<U>(nullptr))>
-struct is_same_char : std::is_same<T, U> {};
-
-template <typename T, typename U>
-struct is_same_char<T, U, std::true_type> : std::is_same<T, typename U::value_type> {};
-
-template <typename T, typename S, typename R = S>
-using IsSameChar = ipc::require<is_same_char<T, S>::value, R>;
-
-////////////////////////////////////////////////////////////////
-/// to_tchar implementation
-////////////////////////////////////////////////////////////////
-
-template <typename T = TCHAR>
-constexpr auto to_tchar(ipc::string &&str) -> IsSameChar<T, ipc::string, ipc::string &&> {
-    return std::move(str); // noconv
-}
-
-/**
- * @remarks codecvt_utf8_utf16/std::wstring_convert is deprecated
- * @see https://codingtidbit.com/2020/02/09/c17-codecvt_utf8-is-deprecated/
- *      https://stackoverflow.com/questions/42946335/deprecated-header-codecvt-replacement
- *      https://en.cppreference.com/w/cpp/locale/codecvt/in
- *      https://docs.microsoft.com/en-us/windows/win32/api/stringapiset/nf-stringapiset-multibytetowidechar
-*/
-template <typename T = TCHAR>
-auto to_tchar(ipc::string &&external) -> IsSameChar<T, ipc::wstring> {
-    if (external.empty()) {
-        return {}; // noconv
-    }
-    /**
-     * CP_ACP       : The system default Windows ANSI code page.
-     * CP_MACCP     : The current system Macintosh code page.
-     * CP_OEMCP     : The current system OEM code page.
-     * CP_SYMBOL    : Symbol code page (42).
-     * CP_THREAD_ACP: The Windows ANSI code page for the current thread.
-     * CP_UTF7      : UTF-7. Use this value only when forced by a 7-bit transport mechanism. Use of UTF-8 is preferred.
-     * CP_UTF8      : UTF-8.
-    */
-    int size_needed = ::MultiByteToWideChar(CP_UTF8, 0, &external[0], (int)external.size(), NULL, 0);
-    if (size_needed <= 0) {
-        return {};
-    }
-    ipc::wstring internal(size_needed, L'\0');
-    ::MultiByteToWideChar(CP_UTF8, 0, &external[0], (int)external.size(), &internal[0], size_needed);
-    return internal;
-}
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/policy.h b/src/libipc/policy.h
deleted file mode 100755
index 89596079..00000000
--- a/src/libipc/policy.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#pragma once
-
-#include <type_traits>
-
-#include "libipc/def.h"
-#include "libipc/prod_cons.h"
-
-#include "libipc/circ/elem_array.h"
-
-namespace ipc {
-namespace policy {
-
-template <template <typename, std::size_t...> class Elems, typename Flag>
-struct choose;
-
-template <typename Flag>
-struct choose<circ::elem_array, Flag> {
-    using flag_t = Flag;
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    using elems_t = circ::elem_array<ipc::prod_cons_impl<flag_t>, DataSize, AlignSize>;
-};
-
-} // namespace policy
-} // namespace ipc
diff --git a/src/libipc/pool_alloc.cpp b/src/libipc/pool_alloc.cpp
deleted file mode 100755
index d19a13c7..00000000
--- a/src/libipc/pool_alloc.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#include "libipc/pool_alloc.h"
-
-#include "libipc/memory/resource.h"
-
-namespace ipc {
-namespace mem {
-
-void* pool_alloc::alloc(std::size_t size) {
-    return async_pool_alloc::alloc(size);
-}
-
-void pool_alloc::free(void* p, std::size_t size) {
-    async_pool_alloc::free(p, size);
-}
-
-} // namespace mem
-} // namespace ipc
diff --git a/src/libipc/prod_cons.h b/src/libipc/prod_cons.h
deleted file mode 100755
index 28d99bda..00000000
--- a/src/libipc/prod_cons.h
+++ /dev/null
@@ -1,433 +0,0 @@
-#pragma once
-
-#include <atomic>
-#include <utility>
-#include <cstring>
-#include <type_traits>
-#include <cstdint>
-
-#include "libipc/def.h"
-
-#include "libipc/platform/detail.h"
-#include "libipc/circ/elem_def.h"
-#include "libipc/utility/log.h"
-#include "libipc/utility/utility.h"
-
-namespace ipc {
-
-////////////////////////////////////////////////////////////////
-/// producer-consumer implementation
-////////////////////////////////////////////////////////////////
-
-template <typename Flag>
-struct prod_cons_impl;
-
-template <>
-struct prod_cons_impl<wr<relat::single, relat::single, trans::unicast>> {
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    struct elem_t {
-        std::aligned_storage_t<DataSize, AlignSize> data_ {};
-    };
-
-    alignas(cache_line_size) std::atomic<circ::u2_t> rd_; // read index
-    alignas(cache_line_size) std::atomic<circ::u2_t> wt_; // write index
-
-    constexpr circ::u2_t cursor() const noexcept {
-        return 0;
-    }
-
-    template <typename W, typename F, typename E>
-    bool push(W* /*wrapper*/, F&& f, E* elems) {
-        auto cur_wt = circ::index_of(wt_.load(std::memory_order_relaxed));
-        if (cur_wt == circ::index_of(rd_.load(std::memory_order_acquire) - 1)) {
-            return false; // full
-        }
-        std::forward<F>(f)(&(elems[cur_wt].data_));
-        wt_.fetch_add(1, std::memory_order_release);
-        return true;
-    }
-
-    /**
-     * In single-single-unicast, 'force_push' means 'no reader' or 'the only one reader is dead'.
-     * So we could just disconnect all connections of receiver, and return false.
-    */
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&&, E*) {
-        wrapper->elems()->disconnect_receiver(~static_cast<circ::cc_t>(0u));
-        return false;
-    }
-
-    template <typename W, typename F, typename R, typename E>
-    bool pop(W* /*wrapper*/, circ::u2_t& /*cur*/, F&& f, R&& out, E* elems) {
-        auto cur_rd = circ::index_of(rd_.load(std::memory_order_relaxed));
-        if (cur_rd == circ::index_of(wt_.load(std::memory_order_acquire))) {
-            return false; // empty
-        }
-        std::forward<F>(f)(&(elems[cur_rd].data_));
-        std::forward<R>(out)(true);
-        rd_.fetch_add(1, std::memory_order_release);
-        return true;
-    }
-};
-
-template <>
-struct prod_cons_impl<wr<relat::single, relat::multi , trans::unicast>>
-     : prod_cons_impl<wr<relat::single, relat::single, trans::unicast>> {
-
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&&, E*) {
-        wrapper->elems()->disconnect_receiver(1);
-        return false;
-    }
-
-    template <typename W, typename F, typename R, 
-              template <std::size_t, std::size_t> class E, std::size_t DS, std::size_t AS>
-    bool pop(W* /*wrapper*/, circ::u2_t& /*cur*/, F&& f, R&& out, E<DS, AS>* elems) {
-        byte_t buff[DS];
-        for (unsigned k = 0;;) {
-            auto cur_rd = rd_.load(std::memory_order_relaxed);
-            if (circ::index_of(cur_rd) ==
-                circ::index_of(wt_.load(std::memory_order_acquire))) {
-                return false; // empty
-            }
-            std::memcpy(buff, &(elems[circ::index_of(cur_rd)].data_), sizeof(buff));
-            if (rd_.compare_exchange_weak(cur_rd, cur_rd + 1, std::memory_order_release)) {
-                std::forward<F>(f)(buff);
-                std::forward<R>(out)(true);
-                return true;
-            }
-            ipc::yield(k);
-        }
-    }
-};
-
-template <>
-struct prod_cons_impl<wr<relat::multi , relat::multi, trans::unicast>>
-     : prod_cons_impl<wr<relat::single, relat::multi, trans::unicast>> {
-
-    using flag_t = std::uint64_t;
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    struct elem_t {
-        std::aligned_storage_t<DataSize, AlignSize> data_ {};
-        std::atomic<flag_t> f_ct_ { 0 }; // commit flag
-    };
-
-    alignas(cache_line_size) std::atomic<circ::u2_t> ct_; // commit index
-
-    template <typename W, typename F, typename E>
-    bool push(W* /*wrapper*/, F&& f, E* elems) {
-        circ::u2_t cur_ct, nxt_ct;
-        for (unsigned k = 0;;) {
-            cur_ct = ct_.load(std::memory_order_relaxed);
-            if (circ::index_of(nxt_ct = cur_ct + 1) ==
-                circ::index_of(rd_.load(std::memory_order_acquire))) {
-                return false; // full
-            }
-            if (ct_.compare_exchange_weak(cur_ct, nxt_ct, std::memory_order_acq_rel)) {
-                break;
-            }
-            ipc::yield(k);
-        }
-        auto* el = elems + circ::index_of(cur_ct);
-        std::forward<F>(f)(&(el->data_));
-        // set flag & try update wt
-        el->f_ct_.store(~static_cast<flag_t>(cur_ct), std::memory_order_release);
-        while (1) {
-            auto cac_ct = el->f_ct_.load(std::memory_order_acquire);
-            if (cur_ct != wt_.load(std::memory_order_relaxed)) {
-                return true;
-            }
-            if ((~cac_ct) != cur_ct) {
-                return true;
-            }
-            if (!el->f_ct_.compare_exchange_strong(cac_ct, 0, std::memory_order_relaxed)) {
-                return true;
-            }
-            wt_.store(nxt_ct, std::memory_order_release);
-            cur_ct = nxt_ct;
-            nxt_ct = cur_ct + 1;
-            el = elems + circ::index_of(cur_ct);
-        }
-        return true;
-    }
-
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&&, E*) {
-        wrapper->elems()->disconnect_receiver(1);
-        return false;
-    }
-
-    template <typename W, typename F, typename R, 
-              template <std::size_t, std::size_t> class E, std::size_t DS, std::size_t AS>
-    bool pop(W* /*wrapper*/, circ::u2_t& /*cur*/, F&& f, R&& out, E<DS, AS>* elems) {
-        byte_t buff[DS];
-        for (unsigned k = 0;;) {
-            auto cur_rd = rd_.load(std::memory_order_relaxed);
-            auto cur_wt = wt_.load(std::memory_order_acquire);
-            auto id_rd  = circ::index_of(cur_rd);
-            auto id_wt  = circ::index_of(cur_wt);
-            if (id_rd == id_wt) {
-                auto* el = elems + id_wt;
-                auto cac_ct = el->f_ct_.load(std::memory_order_acquire);
-                if ((~cac_ct) != cur_wt) {
-                    return false; // empty
-                }
-                if (el->f_ct_.compare_exchange_weak(cac_ct, 0, std::memory_order_relaxed)) {
-                    wt_.store(cur_wt + 1, std::memory_order_release);
-                }
-                k = 0;
-            }
-            else {
-                std::memcpy(buff, &(elems[circ::index_of(cur_rd)].data_), sizeof(buff));
-                if (rd_.compare_exchange_weak(cur_rd, cur_rd + 1, std::memory_order_release)) {
-                    std::forward<F>(f)(buff);
-                    std::forward<R>(out)(true);
-                    return true;
-                }
-                ipc::yield(k);
-            }
-        }
-    }
-};
-
-template <>
-struct prod_cons_impl<wr<relat::single, relat::multi, trans::broadcast>> {
-
-    using rc_t = std::uint64_t;
-
-    enum : rc_t {
-        ep_mask = 0x00000000ffffffffull,
-        ep_incr = 0x0000000100000000ull
-    };
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    struct elem_t {
-        std::aligned_storage_t<DataSize, AlignSize> data_ {};
-        std::atomic<rc_t> rc_ { 0 }; // read-counter
-    };
-
-    alignas(cache_line_size) std::atomic<circ::u2_t> wt_;   // write index
-    alignas(cache_line_size) rc_t epoch_ { 0 };             // only one writer
-
-    circ::u2_t cursor() const noexcept {
-        return wt_.load(std::memory_order_acquire);
-    }
-
-    template <typename W, typename F, typename E>
-    bool push(W* wrapper, F&& f, E* elems) {
-        E* el;
-        for (unsigned k = 0;;) {
-            circ::cc_t cc = wrapper->elems()->connections(std::memory_order_relaxed);
-            if (cc == 0) return false; // no reader
-            el = elems + circ::index_of(wt_.load(std::memory_order_relaxed));
-            // check all consumers have finished reading this element
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            circ::cc_t rem_cc = cur_rc & ep_mask;
-            if ((cc & rem_cc) && ((cur_rc & ~ep_mask) == epoch_)) {
-                return false; // has not finished yet
-            }
-            // consider rem_cc to be 0 here
-            if (el->rc_.compare_exchange_weak(
-                        cur_rc, epoch_ | static_cast<rc_t>(cc), std::memory_order_release)) {
-                break;
-            }
-            ipc::yield(k);
-        }
-        std::forward<F>(f)(&(el->data_));
-        wt_.fetch_add(1, std::memory_order_release);
-        return true;
-    }
-
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&& f, E* elems) {
-        E* el;
-        epoch_ += ep_incr;
-        for (unsigned k = 0;;) {
-            circ::cc_t cc = wrapper->elems()->connections(std::memory_order_relaxed);
-            if (cc == 0) return false; // no reader
-            el = elems + circ::index_of(wt_.load(std::memory_order_relaxed));
-            // check all consumers have finished reading this element
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            circ::cc_t rem_cc = cur_rc & ep_mask;
-            if (cc & rem_cc) {
-                ipc::log("force_push: k = %u, cc = %u, rem_cc = %u\n", k, cc, rem_cc);
-                cc = wrapper->elems()->disconnect_receiver(rem_cc); // disconnect all invalid readers
-                if (cc == 0) return false; // no reader
-            }
-            // just compare & exchange
-            if (el->rc_.compare_exchange_weak(
-                        cur_rc, epoch_ | static_cast<rc_t>(cc), std::memory_order_release)) {
-                break;
-            }
-            ipc::yield(k);
-        }
-        std::forward<F>(f)(&(el->data_));
-        wt_.fetch_add(1, std::memory_order_release);
-        return true;
-    }
-
-    template <typename W, typename F, typename R, typename E>
-    bool pop(W* wrapper, circ::u2_t& cur, F&& f, R&& out, E* elems) {
-        if (cur == cursor()) return false; // acquire
-        auto* el = elems + circ::index_of(cur++);
-        std::forward<F>(f)(&(el->data_));
-        for (unsigned k = 0;;) {
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            if ((cur_rc & ep_mask) == 0) {
-                std::forward<R>(out)(true);
-                return true;
-            }
-            auto nxt_rc = cur_rc & ~static_cast<rc_t>(wrapper->connected_id());
-            if (el->rc_.compare_exchange_weak(cur_rc, nxt_rc, std::memory_order_release)) {
-                std::forward<R>(out)((nxt_rc & ep_mask) == 0);
-                return true;
-            }
-            ipc::yield(k);
-        }
-    }
-};
-
-template <>
-struct prod_cons_impl<wr<relat::multi, relat::multi, trans::broadcast>> {
-
-    using rc_t   = std::uint64_t;
-    using flag_t = std::uint64_t;
-
-    enum : rc_t {
-        rc_mask = 0x00000000ffffffffull,
-        ep_mask = 0x00ffffffffffffffull,
-        ep_incr = 0x0100000000000000ull,
-        ic_mask = 0xff000000ffffffffull,
-        ic_incr = 0x0000000100000000ull
-    };
-
-    template <std::size_t DataSize, std::size_t AlignSize>
-    struct elem_t {
-        std::aligned_storage_t<DataSize, AlignSize> data_ {};
-        std::atomic<rc_t  > rc_   { 0 }; // read-counter
-        std::atomic<flag_t> f_ct_ { 0 }; // commit flag
-    };
-
-    alignas(cache_line_size) std::atomic<circ::u2_t> ct_;   // commit index
-    alignas(cache_line_size) std::atomic<rc_t> epoch_ { 0 };
-
-    circ::u2_t cursor() const noexcept {
-        return ct_.load(std::memory_order_acquire);
-    }
-
-    constexpr static rc_t inc_rc(rc_t rc) noexcept {
-        return (rc & ic_mask) | ((rc + ic_incr) & ~ic_mask);
-    }
-
-    constexpr static rc_t inc_mask(rc_t rc) noexcept {
-        return inc_rc(rc) & ~rc_mask;
-    }
-
-    template <typename W, typename F, typename E>
-    bool push(W* wrapper, F&& f, E* elems) {
-        E* el;
-        circ::u2_t cur_ct;
-        rc_t epoch = epoch_.load(std::memory_order_acquire);
-        for (unsigned k = 0;;) {
-            circ::cc_t cc = wrapper->elems()->connections(std::memory_order_relaxed);
-            if (cc == 0) return false; // no reader
-            el = elems + circ::index_of(cur_ct = ct_.load(std::memory_order_relaxed));
-            // check all consumers have finished reading this element
-            auto cur_rc = el->rc_.load(std::memory_order_relaxed);
-            circ::cc_t rem_cc = cur_rc & rc_mask;
-            if ((cc & rem_cc) && ((cur_rc & ~ep_mask) == epoch)) {
-                return false; // has not finished yet
-            }
-            else if (!rem_cc) {
-                auto cur_fl = el->f_ct_.load(std::memory_order_acquire);
-                if ((cur_fl != cur_ct) && cur_fl) {
-                    return false; // full
-                }
-            }
-            // consider rem_cc to be 0 here
-            if (el->rc_.compare_exchange_weak(
-                        cur_rc, inc_mask(epoch | (cur_rc & ep_mask)) | static_cast<rc_t>(cc), std::memory_order_relaxed) &&
-                epoch_.compare_exchange_weak(epoch, epoch, std::memory_order_acq_rel)) {
-                break;
-            }
-            ipc::yield(k);
-        }
-        // only one thread/process would touch here at one time
-        ct_.store(cur_ct + 1, std::memory_order_release);
-        std::forward<F>(f)(&(el->data_));
-        // set flag & try update wt
-        el->f_ct_.store(~static_cast<flag_t>(cur_ct), std::memory_order_release);
-        return true;
-    }
-
-    template <typename W, typename F, typename E>
-    bool force_push(W* wrapper, F&& f, E* elems) {
-        E* el;
-        circ::u2_t cur_ct;
-        rc_t epoch = epoch_.fetch_add(ep_incr, std::memory_order_release) + ep_incr;
-        for (unsigned k = 0;;) {
-            circ::cc_t cc = wrapper->elems()->connections(std::memory_order_relaxed);
-            if (cc == 0) return false; // no reader
-            el = elems + circ::index_of(cur_ct = ct_.load(std::memory_order_relaxed));
-            // check all consumers have finished reading this element
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            circ::cc_t rem_cc = cur_rc & rc_mask;
-            if (cc & rem_cc) {
-                ipc::log("force_push: k = %u, cc = %u, rem_cc = %u\n", k, cc, rem_cc);
-                cc = wrapper->elems()->disconnect_receiver(rem_cc); // disconnect all invalid readers
-                if (cc == 0) return false; // no reader
-            }
-            // just compare & exchange
-            if (el->rc_.compare_exchange_weak(
-                        cur_rc, inc_mask(epoch | (cur_rc & ep_mask)) | static_cast<rc_t>(cc), std::memory_order_relaxed)) {
-                if (epoch == epoch_.load(std::memory_order_acquire)) {
-                    break;
-                }
-                else if (push(wrapper, std::forward<F>(f), elems)) {
-                    return true;
-                }
-                epoch = epoch_.fetch_add(ep_incr, std::memory_order_release) + ep_incr;
-            }
-            ipc::yield(k);
-        }
-        // only one thread/process would touch here at one time
-        ct_.store(cur_ct + 1, std::memory_order_release);
-        std::forward<F>(f)(&(el->data_));
-        // set flag & try update wt
-        el->f_ct_.store(~static_cast<flag_t>(cur_ct), std::memory_order_release);
-        return true;
-    }
-
-    template <typename W, typename F, typename R, typename E, std::size_t N>
-    bool pop(W* wrapper, circ::u2_t& cur, F&& f, R&& out, E(& elems)[N]) {
-        auto* el = elems + circ::index_of(cur);
-        auto cur_fl = el->f_ct_.load(std::memory_order_acquire);
-        if (cur_fl != ~static_cast<flag_t>(cur)) {
-            return false; // empty
-        }
-        ++cur;
-        std::forward<F>(f)(&(el->data_));
-        for (unsigned k = 0;;) {
-            auto cur_rc = el->rc_.load(std::memory_order_acquire);
-            if ((cur_rc & rc_mask) == 0) {
-                std::forward<R>(out)(true);
-                el->f_ct_.store(cur + N - 1, std::memory_order_release);
-                return true;
-            }
-            auto nxt_rc = inc_rc(cur_rc) & ~static_cast<rc_t>(wrapper->connected_id());
-            bool last_one = false;
-            if ((last_one = (nxt_rc & rc_mask) == 0)) {
-                el->f_ct_.store(cur + N - 1, std::memory_order_release);
-            }
-            if (el->rc_.compare_exchange_weak(cur_rc, nxt_rc, std::memory_order_release)) {
-                std::forward<R>(out)(last_one);
-                return true;
-            }
-            ipc::yield(k);
-        }
-    }
-};
-
-} // namespace ipc
diff --git a/src/libipc/queue.h b/src/libipc/queue.h
deleted file mode 100755
index f66860b8..00000000
--- a/src/libipc/queue.h
+++ /dev/null
@@ -1,216 +0,0 @@
-#pragma once
-
-#include <type_traits>
-#include <new>
-#include <utility>  // [[since C++14]]: std::exchange
-#include <algorithm>
-#include <atomic>
-#include <tuple>
-#include <thread>
-#include <chrono>
-#include <string>
-#include <cassert>  // assert
-
-#include "libipc/def.h"
-#include "libipc/shm.h"
-#include "libipc/rw_lock.h"
-
-#include "libipc/utility/log.h"
-#include "libipc/platform/detail.h"
-#include "libipc/circ/elem_def.h"
-
-namespace ipc {
-namespace detail {
-
-class queue_conn {
-protected:
-    circ::cc_t connected_ = 0;
-    shm::handle elems_h_;
-
-    template <typename Elems>
-    Elems* open(char const * name) {
-        if (name == nullptr || name[0] == '\0') {
-            ipc::error("fail open waiter: name is empty!\n");
-            return nullptr;
-        }
-        if (!elems_h_.acquire(name, sizeof(Elems))) {
-            return nullptr;
-        }
-        auto elems = static_cast<Elems*>(elems_h_.get());
-        if (elems == nullptr) {
-            ipc::error("fail acquire elems: %s\n", name);
-            return nullptr;
-        }
-        elems->init();
-        return elems;
-    }
-
-    void close() {
-        elems_h_.release();
-    }
-
-public:
-    queue_conn() = default;
-    queue_conn(const queue_conn&) = delete;
-    queue_conn& operator=(const queue_conn&) = delete;
-
-    bool connected() const noexcept {
-        return connected_ != 0;
-    }
-
-    circ::cc_t connected_id() const noexcept {
-        return connected_;
-    }
-
-    template <typename Elems>
-    auto connect(Elems* elems) noexcept
-                         /*needs 'optional' here*/
-     -> std::tuple<bool, bool, decltype(std::declval<Elems>().cursor())> {
-        if (elems == nullptr) return {};
-        // if it's already connected, just return
-        if (connected()) return {connected(), false, 0};
-        connected_ = elems->connect_receiver();
-        return {connected(), true, elems->cursor()};
-    }
-
-    template <typename Elems>
-    bool disconnect(Elems* elems) noexcept {
-        if (elems == nullptr) return false;
-        // if it's already disconnected, just return false
-        if (!connected()) return false;
-        elems->disconnect_receiver(std::exchange(connected_, 0));
-        return true;
-    }
-};
-
-template <typename Elems>
-class queue_base : public queue_conn {
-    using base_t = queue_conn;
-
-public:
-    using elems_t  = Elems;
-    using policy_t = typename elems_t::policy_t;
-
-protected:
-    elems_t * elems_ = nullptr;
-    decltype(std::declval<elems_t>().cursor()) cursor_ = 0;
-    bool sender_flag_ = false;
-
-public:
-    using base_t::base_t;
-
-    queue_base() = default;
-
-    explicit queue_base(char const * name)
-        : queue_base{} {
-        elems_ = open<elems_t>(name);
-    }
-
-    explicit queue_base(elems_t * elems) noexcept
-        : queue_base{} {
-        assert(elems != nullptr);
-        elems_ = elems;
-    }
-
-    /* not virtual */ ~queue_base() {
-        base_t::close();
-    }
-
-    elems_t       * elems()       noexcept { return elems_; }
-    elems_t const * elems() const noexcept { return elems_; }
-
-    bool ready_sending() noexcept {
-        if (elems_ == nullptr) return false;
-        return sender_flag_ || (sender_flag_ = elems_->connect_sender());
-    }
-
-    void shut_sending() noexcept {
-        if (elems_ == nullptr) return;
-        if (!sender_flag_) return;
-        elems_->disconnect_sender();
-    }
-
-    bool connect() noexcept {
-        auto tp = base_t::connect(elems_);
-        if (std::get<0>(tp) && std::get<1>(tp)) {
-            cursor_ = std::get<2>(tp);
-            return true;
-        }
-        return std::get<0>(tp);
-    }
-
-    bool disconnect() noexcept {
-        return base_t::disconnect(elems_);
-    }
-
-    std::size_t conn_count() const noexcept {
-        return (elems_ == nullptr) ? static_cast<std::size_t>(invalid_value) : elems_->conn_count();
-    }
-
-    bool valid() const noexcept {
-        return elems_ != nullptr;
-    }
-
-    bool empty() const noexcept {
-        return !valid() || (cursor_ == elems_->cursor());
-    }
-
-    template <typename T, typename F, typename... P>
-    bool push(F&& prep, P&&... params) {
-        if (elems_ == nullptr) return false;
-        return elems_->push(this, [&](void* p) {
-            if (prep(p)) ::new (p) T(std::forward<P>(params)...);
-        });
-    }
-
-    template <typename T, typename F, typename... P>
-    bool force_push(F&& prep, P&&... params) {
-        if (elems_ == nullptr) return false;
-        return elems_->force_push(this, [&](void* p) {
-            if (prep(p)) ::new (p) T(std::forward<P>(params)...);
-        });
-    }
-
-    template <typename T, typename F>
-    bool pop(T& item, F&& out) {
-        if (elems_ == nullptr) {
-            return false;
-        }
-        return elems_->pop(this, &(this->cursor_), [&item](void* p) {
-            ::new (&item) T(std::move(*static_cast<T*>(p)));
-        }, std::forward<F>(out));
-    }
-};
-
-} // namespace detail
-
-template <typename T, typename Policy>
-class queue final : public detail::queue_base<typename Policy::template elems_t<sizeof(T), alignof(T)>> {
-    using base_t = detail::queue_base<typename Policy::template elems_t<sizeof(T), alignof(T)>>;
-
-public:
-    using value_t = T;
-
-    using base_t::base_t;
-
-    template <typename... P>
-    bool push(P&&... params) {
-        return base_t::template push<T>(std::forward<P>(params)...);
-    }
-
-    template <typename... P>
-    bool force_push(P&&... params) {
-        return base_t::template force_push<T>(std::forward<P>(params)...);
-    }
-
-    bool pop(T& item) {
-        return base_t::pop(item, [](bool) {});
-    }
-
-    template <typename F>
-    bool pop(T& item, F&& out) {
-        return base_t::pop(item, std::forward<F>(out));
-    }
-};
-
-} // namespace ipc
diff --git a/src/libipc/shm.cpp b/src/libipc/shm.cpp
old mode 100755
new mode 100644
index 92f96ef4..4b6d54d9
--- a/src/libipc/shm.cpp
+++ b/src/libipc/shm.cpp
@@ -1,103 +1,106 @@
-
-#include <string>
-#include <utility>
-
-#include "libipc/shm.h"
-
-#include "libipc/utility/pimpl.h"
-#include "libipc/memory/resource.h"
-
-namespace ipc {
-namespace shm {
-
-class handle::handle_ : public pimpl<handle_> {
-public:
-    shm::id_t id_ = nullptr;
-    void*     m_  = nullptr;
-
-    ipc::string n_;
-    std::size_t s_ = 0;
-};
-
-handle::handle()
-    : p_(p_->make()) {
-}
-
-handle::handle(char const * name, std::size_t size, unsigned mode)
-    : handle() {
-    acquire(name, size, mode);
-}
-
-handle::handle(handle&& rhs)
-    : handle() {
-    swap(rhs);
-}
-
-handle::~handle() {
-    release();
-    p_->clear();
-}
-
-void handle::swap(handle& rhs) {
-    std::swap(p_, rhs.p_);
-}
-
-handle& handle::operator=(handle rhs) {
-    swap(rhs);
-    return *this;
-}
-
-bool handle::valid() const noexcept {
-    return impl(p_)->m_ != nullptr;
-}
-
-std::size_t handle::size() const noexcept {
-    return impl(p_)->s_;
-}
-
-char const * handle::name() const noexcept {
-    return impl(p_)->n_.c_str();
-}
-
-std::int32_t handle::ref() const noexcept {
-    return shm::get_ref(impl(p_)->id_);
-}
-
-void handle::sub_ref() noexcept {
-    shm::sub_ref(impl(p_)->id_);
-}
-
-bool handle::acquire(char const * name, std::size_t size, unsigned mode) {
-    release();
-    impl(p_)->id_ = shm::acquire((impl(p_)->n_ = name).c_str(), size, mode);
-    impl(p_)->m_  = shm::get_mem(impl(p_)->id_, &(impl(p_)->s_));
-    return valid();
-}
-
-std::int32_t handle::release() {
-    if (impl(p_)->id_ == nullptr) return -1;
-    return shm::release(detach());
-}
-
-void* handle::get() const {
-    return impl(p_)->m_;
-}
-
-void handle::attach(id_t id) {
-    if (id == nullptr) return;
-    release();
-    impl(p_)->id_ = id;
-    impl(p_)->m_  = shm::get_mem(impl(p_)->id_, &(impl(p_)->s_));
-}
-
-id_t handle::detach() {
-    auto old = impl(p_)->id_;
-    impl(p_)->id_ = nullptr;
-    impl(p_)->m_  = nullptr;
-    impl(p_)->s_  = 0;
-    impl(p_)->n_.clear();
-    return old;
-}
-
-} // namespace shm
-} // namespace ipc
+
+#include <utility>  // std::exchange, std::swap (since C++11)
+
+#include "libimp/log.h"
+
+#include "libimp/detect_plat.h"
+#if defined(LIBIMP_OS_WIN)
+# include "libipc/platform/win/shm_impl.h"
+#else
+# include "libipc/platform/posix/shm_impl.h"
+#endif
+
+LIBIPC_NAMESPACE_BEG_
+
+/// \brief C style shared memory access interface implementation.
+
+void *shm_get(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  return shm->memp;
+}
+
+std::size_t shm_size(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  return shm->f_sz;
+}
+
+std::string shm_name(shm_t h) noexcept {
+  LIBIMP_LOG_();
+  if (h == nullptr) {
+    log.error("shm handle is null.");
+    return {};
+  }
+  auto shm = static_cast<shm_handle *>(h);
+  return shm->file;
+}
+
+/// \brief The shared memory object.
+
+shared_memory::shared_memory() noexcept
+  : shm_(nullptr) {}
+
+shared_memory::~shared_memory() noexcept {
+  this->close();
+}
+
+shared_memory::shared_memory(shared_memory &&other) noexcept
+  : shm_(std::exchange(other.shm_, nullptr)) {}
+
+shared_memory &shared_memory::operator=(shared_memory &&rhs) & noexcept {
+  shared_memory(std::move(rhs)).swap(*this);
+  return *this;
+}
+
+void shared_memory::swap(shared_memory &other) noexcept {
+  std::swap(this->shm_, other.shm_);
+}
+
+shared_memory::shared_memory(std::string name, std::size_t size, mode::type type) noexcept
+  : shared_memory() {
+  open(std::move(name), size, type);
+}
+
+bool shared_memory::open(std::string name, std::size_t size, mode::type type) noexcept {
+  this->close();
+  auto ret = shm_open(std::move(name), size, type);
+  if (!ret) return false;
+  shm_ = *ret;
+  return true;
+}
+
+void shared_memory::close() noexcept {
+  if (!valid()) return;
+  shm_close(std::exchange(shm_, nullptr));
+}
+
+bool shared_memory::valid() const noexcept {
+  return this->shm_ != nullptr;
+}
+
+void *shared_memory::get() const noexcept {
+  return shm_get(shm_);
+}
+
+void *shared_memory::operator*() const noexcept {
+  return this->get();
+}
+
+std::size_t shared_memory::size() const noexcept {
+  return shm_size(shm_);
+}
+
+std::string shared_memory::name() const noexcept {
+  return shm_name(shm_);
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/spin_lock.cpp b/src/libipc/spin_lock.cpp
new file mode 100644
index 00000000..d21781a1
--- /dev/null
+++ b/src/libipc/spin_lock.cpp
@@ -0,0 +1,116 @@
+
+#include <limits>
+
+#include "libimp/detect_plat.h"
+
+#include "libipc/spin_lock.h"
+
+LIBIPC_NAMESPACE_BEG_
+
+#if defined(LIBIMP_CC_MSVC)
+# include <Windows.h>   // YieldProcessor
+/**
+ * \brief Not for intel c++ compiler, so ignore http://software.intel.com/en-us/forums/topic/296168
+ * \see http://msdn.microsoft.com/en-us/library/windows/desktop/ms687419(v=vs.85).aspx
+*/
+# define LIBIPC_LOCK_PAUSE_() YieldProcessor()
+#elif defined(LIBIMP_CC_GNUC)
+# if defined(LIBIMP_INSTR_X86_64)
+/**
+ * \brief Intel(R) 64 and IA-32 Architectures Software Developer's Manual V2
+ *        PAUSE-Spin Loop Hint, 4-57
+ * \see http://www.intel.com/content/www/us/en/architecture-and-technology/64-ia-32-architectures-software-developer-instruction-set-reference-manual-325383.html?wapkw=instruction+set+reference
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__("pause")
+# elif defined(LIBIMP_INSTR_I64)
+/**
+ * \brief Intel(R) Itanium(R) Architecture Developer's Manual, Vol.3
+ *        hint - Performance Hint, 3:145
+ * \see http://www.intel.com/content/www/us/en/processors/itanium/itanium-architecture-vol-3-manual.html
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("hint @pause")
+# elif defined(LIBIMP_INSTR_ARM)
+/**
+ * \brief ARM Architecture Reference Manuals (YIELD)
+ * \see http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.subset.architecture.reference/index.html
+*/
+#   define LIBIPC_LOCK_PAUSE_() __asm__ __volatile__ ("yield")
+# endif
+#endif /*compilers*/
+
+#if !defined(LIBIPC_LOCK_PAUSE_)
+/**
+ * \brief Just use a compiler fence, prevent compiler from optimizing loop
+*/
+# define LIBIPC_LOCK_PAUSE_() std::atomic_signal_fence(std::memory_order_seq_cst)
+#endif /*!defined(LIBIPC_LOCK_PAUSE_)*/
+
+/**
+ * \brief Gives hint to processor that improves performance of spin-wait loops.
+*/
+void pause() noexcept {
+  LIBIPC_LOCK_PAUSE_();
+}
+
+/**
+ * \brief Basic spin lock
+*/
+
+void spin_lock::lock() noexcept {
+  for (unsigned k = 0;
+        lc_.exchange(1, std::memory_order_acquire);
+        yield(k)) ;
+}
+
+void spin_lock::unlock() noexcept {
+  lc_.store(0, std::memory_order_release);
+}
+
+/// \brief Constants for shared mode spin lock
+enum : unsigned {
+  w_mask = (std::numeric_limits<std::make_signed_t<unsigned>>::max)(), // b 0111 1111
+  w_flag = w_mask + 1,                                                 // b 1000 0000
+};
+
+/**
+ * \brief Support for shared mode spin lock
+*/
+
+void rw_lock::lock() noexcept {
+  for (unsigned k = 0;;) {
+    auto old = lc_.fetch_or(w_flag, std::memory_order_acq_rel);
+    if (!old) return;           // got w-lock
+    if (!(old & w_flag)) break; // other thread having r-lock
+    yield(k);                   // other thread having w-lock
+  }
+  // wait for reading finished
+  for (unsigned k = 0;
+        lc_.load(std::memory_order_acquire) & w_mask;
+        yield(k)) ;
+}
+
+void rw_lock::unlock() noexcept {
+  lc_.store(0, std::memory_order_release);
+}
+
+void rw_lock::lock_shared() noexcept {
+  auto old = lc_.load(std::memory_order_acquire);
+  for (unsigned k = 0;;) {
+    // if w_flag set, just continue
+    if (old & w_flag) {
+      yield(k);
+      old = lc_.load(std::memory_order_acquire);
+    }
+    // otherwise try cas lc + 1 (set r-lock)
+    else if (lc_.compare_exchange_weak(old, old + 1, std::memory_order_release)) {
+      return;
+    }
+    // set r-lock failed, old has been updated
+  }
+}
+
+void rw_lock::unlock_shared() noexcept {
+  lc_.fetch_sub(1, std::memory_order_release);
+}
+
+LIBIPC_NAMESPACE_END_
diff --git a/src/libipc/sync/condition.cpp b/src/libipc/sync/condition.cpp
deleted file mode 100644
index 06d90e19..00000000
--- a/src/libipc/sync/condition.cpp
+++ /dev/null
@@ -1,72 +0,0 @@
-
-#include "libipc/condition.h"
-
-#include "libipc/utility/pimpl.h"
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#include "libipc/platform/win/condition.h"
-#elif defined(IPC_OS_LINUX_)
-#include "libipc/platform/linux/condition.h"
-#elif defined(IPC_OS_QNX_)
-#include "libipc/platform/posix/condition.h"
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
-
-namespace ipc {
-namespace sync {
-
-class condition::condition_ : public ipc::pimpl<condition_> {
-public:
-    ipc::detail::sync::condition cond_;
-};
-
-condition::condition()
-    : p_(p_->make()) {
-}
-
-condition::condition(char const * name)
-    : condition() {
-    open(name);
-}
-
-condition::~condition() {
-    close();
-    p_->clear();
-}
-
-void const *condition::native() const noexcept {
-    return impl(p_)->cond_.native();
-}
-
-void *condition::native() noexcept {
-    return impl(p_)->cond_.native();
-}
-
-bool condition::valid() const noexcept {
-    return impl(p_)->cond_.valid();
-}
-
-bool condition::open(char const *name) noexcept {
-    return impl(p_)->cond_.open(name);
-}
-
-void condition::close() noexcept {
-    impl(p_)->cond_.close();
-}
-
-bool condition::wait(ipc::sync::mutex &mtx, std::uint64_t tm) noexcept {
-    return impl(p_)->cond_.wait(mtx, tm);
-}
-
-bool condition::notify(ipc::sync::mutex &mtx) noexcept {
-    return impl(p_)->cond_.notify(mtx);
-}
-
-bool condition::broadcast(ipc::sync::mutex &mtx) noexcept {
-    return impl(p_)->cond_.broadcast(mtx);
-}
-
-} // namespace sync
-} // namespace ipc
diff --git a/src/libipc/sync/mutex.cpp b/src/libipc/sync/mutex.cpp
deleted file mode 100644
index 79f1a910..00000000
--- a/src/libipc/sync/mutex.cpp
+++ /dev/null
@@ -1,72 +0,0 @@
-
-#include "libipc/mutex.h"
-
-#include "libipc/utility/pimpl.h"
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#include "libipc/platform/win/mutex.h"
-#elif defined(IPC_OS_LINUX_)
-#include "libipc/platform/linux/mutex.h"
-#elif defined(IPC_OS_QNX_)
-#include "libipc/platform/posix/mutex.h"
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
-
-namespace ipc {
-namespace sync {
-
-class mutex::mutex_ : public ipc::pimpl<mutex_> {
-public:
-    ipc::detail::sync::mutex lock_;
-};
-
-mutex::mutex()
-    : p_(p_->make()) {
-}
-
-mutex::mutex(char const * name)
-    : mutex() {
-    open(name);
-}
-
-mutex::~mutex() {
-    close();
-    p_->clear();
-}
-
-void const *mutex::native() const noexcept {
-    return impl(p_)->lock_.native();
-}
-
-void *mutex::native() noexcept {
-    return impl(p_)->lock_.native();
-}
-
-bool mutex::valid() const noexcept {
-    return impl(p_)->lock_.valid();
-}
-
-bool mutex::open(char const *name) noexcept {
-    return impl(p_)->lock_.open(name);
-}
-
-void mutex::close() noexcept {
-    impl(p_)->lock_.close();
-}
-
-bool mutex::lock(std::uint64_t tm) noexcept {
-    return impl(p_)->lock_.lock(tm);
-}
-
-bool mutex::try_lock() noexcept(false) {
-    return impl(p_)->lock_.try_lock();
-}
-
-bool mutex::unlock() noexcept {
-    return impl(p_)->lock_.unlock();
-}
-
-} // namespace sync
-} // namespace ipc
diff --git a/src/libipc/sync/semaphore.cpp b/src/libipc/sync/semaphore.cpp
deleted file mode 100644
index 23f6bdce..00000000
--- a/src/libipc/sync/semaphore.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-
-#include "libipc/semaphore.h"
-
-#include "libipc/utility/pimpl.h"
-#include "libipc/memory/resource.h"
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_WINDOWS_)
-#include "libipc/platform/win/semaphore.h"
-#elif defined(IPC_OS_LINUX_) || defined(IPC_OS_QNX_)
-#include "libipc/platform/posix/semaphore_impl.h"
-#else/*IPC_OS*/
-#   error "Unsupported platform."
-#endif
-
-namespace ipc {
-namespace sync {
-
-class semaphore::semaphore_ : public ipc::pimpl<semaphore_> {
-public:
-    ipc::detail::sync::semaphore sem_;
-};
-
-semaphore::semaphore()
-    : p_(p_->make()) {
-}
-
-semaphore::semaphore(char const * name, std::uint32_t count)
-    : semaphore() {
-    open(name, count);
-}
-
-semaphore::~semaphore() {
-    close();
-    p_->clear();
-}
-
-void const *semaphore::native() const noexcept {
-    return impl(p_)->sem_.native();
-}
-
-void *semaphore::native() noexcept {
-    return impl(p_)->sem_.native();
-}
-
-bool semaphore::valid() const noexcept {
-    return impl(p_)->sem_.valid();
-}
-
-bool semaphore::open(char const *name, std::uint32_t count) noexcept {
-    return impl(p_)->sem_.open(name, count);
-}
-
-void semaphore::close() noexcept {
-    impl(p_)->sem_.close();
-}
-
-bool semaphore::wait(std::uint64_t tm) noexcept {
-    return impl(p_)->sem_.wait(tm);
-}
-
-bool semaphore::post(std::uint32_t count) noexcept {
-    return impl(p_)->sem_.post(count);
-}
-
-} // namespace sync
-} // namespace ipc
diff --git a/src/libipc/utility/concept.h b/src/libipc/utility/concept.h
deleted file mode 100755
index 9325ddcf..00000000
--- a/src/libipc/utility/concept.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#pragma once
-
-#include <type_traits>  // std::enable_if
-
-namespace ipc {
-
-// concept helpers
-
-template <bool Cond, typename R = void>
-using require = typename std::enable_if<Cond, R>::type;
-
-#ifdef IPC_CONCEPT_
-#   error "IPC_CONCEPT_ has been defined."
-#endif
-
-#define IPC_CONCEPT_(NAME, WHAT)                                       \
-template <typename T>                                                  \
-class NAME {                                                           \
-private:                                                               \
-    template <typename Type>                                           \
-    static std::true_type check(decltype(std::declval<Type>().WHAT)*); \
-    template <typename Type>                                           \
-    static std::false_type check(...);                                 \
-public:                                                                \
-    using type = decltype(check<T>(nullptr));                          \
-    constexpr static auto value = type::value;                         \
-}
-
-} // namespace ipc
diff --git a/src/libipc/utility/id_pool.h b/src/libipc/utility/id_pool.h
deleted file mode 100755
index 24d32e4f..00000000
--- a/src/libipc/utility/id_pool.h
+++ /dev/null
@@ -1,103 +0,0 @@
-#pragma once
-
-#include <type_traits>  // std::aligned_storage_t
-#include <cstring>      // std::memcmp
-#include <cstdint>
-
-#include "libipc/def.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-
-using storage_id_t = std::int32_t;
-
-template <std::size_t DataSize, std::size_t AlignSize>
-struct id_type;
-
-template <std::size_t AlignSize>
-struct id_type<0, AlignSize> {
-    uint_t<8> id_;
-
-    id_type& operator=(storage_id_t val) {
-        id_ = static_cast<uint_t<8>>(val);
-        return (*this);
-    }
-
-    operator uint_t<8>() const {
-        return id_;
-    }
-};
-
-template <std::size_t DataSize, std::size_t AlignSize>
-struct id_type : id_type<0, AlignSize> {
-    std::aligned_storage_t<DataSize, AlignSize> data_;
-};
-
-template <std::size_t DataSize  = 0,
-          std::size_t AlignSize = (ipc::detail::min)(DataSize, alignof(std::max_align_t))>
-class id_pool {
-
-    static constexpr std::size_t limited_max_count() {
-        return ipc::detail::min<std::size_t>(large_msg_cache, (std::numeric_limits<uint_t<8>>::max)());
-    }
-
-public:
-    enum : std::size_t {
-        /* eliminate error: taking address of temporary */
-        max_count = limited_max_count()
-    };
-
-private:
-    id_type<DataSize, AlignSize> next_[max_count];
-    uint_t<8> cursor_ = 0;
-    bool prepared_ = false;
-
-public:
-    void prepare() {
-        if (!prepared_ && this->invalid()) this->init();
-        prepared_ = true;
-    }
-
-    void init() {
-        for (storage_id_t i = 0; i < max_count;) {
-            i = next_[i] = (i + 1);
-        }
-    }
-
-    bool invalid() const {
-        static id_pool inv;
-        return std::memcmp(this, &inv, sizeof(id_pool)) == 0;
-    }
-
-    bool empty() const {
-        return cursor_ == max_count;
-    }
-
-    storage_id_t acquire() {
-        if (empty()) return -1;
-        storage_id_t id = cursor_;
-        cursor_ = next_[id]; // point to next
-        return id;
-    }
-
-    bool release(storage_id_t id) {
-        if (id < 0) return false;
-        next_[id] = cursor_;
-        cursor_ = static_cast<uint_t<8>>(id); // put it back
-        return true;
-    }
-
-    void       * at(storage_id_t id)       { return &(next_[id].data_); }
-    void const * at(storage_id_t id) const { return &(next_[id].data_); }
-};
-
-template <typename T>
-class obj_pool : public id_pool<sizeof(T), alignof(T)> {
-    using base_t = id_pool<sizeof(T), alignof(T)>;
-
-public:
-    T       * at(storage_id_t id)       { return reinterpret_cast<T       *>(base_t::at(id)); }
-    T const * at(storage_id_t id) const { return reinterpret_cast<T const *>(base_t::at(id)); }
-};
-
-} // namespace ipc
diff --git a/src/libipc/utility/log.h b/src/libipc/utility/log.h
deleted file mode 100755
index bb1dcea1..00000000
--- a/src/libipc/utility/log.h
+++ /dev/null
@@ -1,39 +0,0 @@
-#pragma once
-
-#include <cstdio>
-#include <utility>
-
-namespace ipc {
-namespace detail {
-
-template <typename O>
-void print(O out, char const * str) {
-    std::fprintf(out, "%s", str);
-}
-
-template <typename O, typename P1, typename... P>
-void print(O out, char const * fmt, P1&& p1, P&&... params) {
-    std::fprintf(out, fmt, std::forward<P1>(p1), std::forward<P>(params)...);
-}
-
-} // namespace detail
-
-inline void log(char const * fmt) {
-    ipc::detail::print(stdout, fmt);
-}
-
-template <typename P1, typename... P>
-void log(char const * fmt, P1&& p1, P&&... params) {
-    ipc::detail::print(stdout, fmt, std::forward<P1>(p1), std::forward<P>(params)...);
-}
-
-inline void error(char const * str) {
-    ipc::detail::print(stderr, str);
-}
-
-template <typename P1, typename... P>
-void error(char const * fmt, P1&& p1, P&&... params) {
-    ipc::detail::print(stderr, fmt, std::forward<P1>(p1), std::forward<P>(params)...);
-}
-
-} // namespace ipc
diff --git a/src/libipc/utility/pimpl.h b/src/libipc/utility/pimpl.h
deleted file mode 100755
index ca0edd3c..00000000
--- a/src/libipc/utility/pimpl.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#pragma once
-
-#include <new>
-#include <utility>
-
-#include "libipc/platform/detail.h"
-#include "libipc/utility/concept.h"
-#include "libipc/pool_alloc.h"
-
-namespace ipc {
-
-// pimpl small object optimization helpers
-
-template <typename T, typename R = T*>
-using IsImplComfortable = ipc::require<(sizeof(T) <= sizeof(T*)), R>;
-
-template <typename T, typename R = T*>
-using IsImplUncomfortable = ipc::require<(sizeof(T) > sizeof(T*)), R>;
-
-template <typename T, typename... P>
-IPC_CONSTEXPR_ auto make_impl(P&&... params) -> IsImplComfortable<T> {
-    T* buf {};
-    ::new (&buf) T { std::forward<P>(params)... };
-    return buf;
-}
-
-template <typename T>
-IPC_CONSTEXPR_ auto impl(T* const (& p)) -> IsImplComfortable<T> {
-    return reinterpret_cast<T*>(&const_cast<char &>(reinterpret_cast<char const &>(p)));
-}
-
-template <typename T>
-IPC_CONSTEXPR_ auto clear_impl(T* p) -> IsImplComfortable<T, void> {
-    if (p != nullptr) impl(p)->~T();
-}
-
-template <typename T, typename... P>
-IPC_CONSTEXPR_ auto make_impl(P&&... params) -> IsImplUncomfortable<T> {
-    return mem::alloc<T>(std::forward<P>(params)...);
-}
-
-template <typename T>
-IPC_CONSTEXPR_ auto clear_impl(T* p) -> IsImplUncomfortable<T, void> {
-    mem::free(p);
-}
-
-template <typename T>
-IPC_CONSTEXPR_ auto impl(T* const (& p)) -> IsImplUncomfortable<T> {
-    return p;
-}
-
-template <typename T>
-struct pimpl {
-    template <typename... P>
-    IPC_CONSTEXPR_ static T* make(P&&... params) {
-        return make_impl<T>(std::forward<P>(params)...);
-    }
-
-    IPC_CONSTEXPR_ void clear() {
-        clear_impl(static_cast<T*>(const_cast<pimpl*>(this)));
-    }
-};
-
-} // namespace ipc
diff --git a/src/libipc/utility/scope_guard.h b/src/libipc/utility/scope_guard.h
deleted file mode 100644
index 9f421496..00000000
--- a/src/libipc/utility/scope_guard.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#pragma once
-
-#include <utility>      // std::forward, std::move
-#include <algorithm>    // std::swap
-#include <type_traits>  // std::decay
-
-namespace ipc {
-
-////////////////////////////////////////////////////////////////
-/// Execute guard function when the enclosing scope exits
-////////////////////////////////////////////////////////////////
-
-template <typename F>
-class scope_guard {
-    F destructor_;
-    mutable bool dismiss_;
-
-public:
-    template <typename D>
-    scope_guard(D && destructor)
-        : destructor_(std::forward<D>(destructor))
-        , dismiss_(false) {
-    }
-
-    scope_guard(scope_guard&& rhs)
-        : destructor_(std::move(rhs.destructor_))
-        , dismiss_(true) /* dismiss rhs */ {
-        std::swap(dismiss_, rhs.dismiss_);
-    }
-
-    ~scope_guard() {
-        try { do_exit(); }
-        /**
-         * In the realm of exceptions, it is fundamental that you can do nothing
-         * if your "undo/recover" action fails.
-        */
-        catch (...) { /* Do nothing */ }
-    }
-
-    void swap(scope_guard & rhs) {
-        std::swap(destructor_, rhs.destructor_);
-        std::swap(dismiss_   , rhs.dismiss_);
-    }
-
-    void dismiss() const noexcept {
-        dismiss_ = true;
-    }
-
-    void do_exit() {
-        if (!dismiss_) {
-            dismiss_ = true;
-            destructor_();
-        }
-    }
-};
-
-template <typename D>
-constexpr auto guard(D && destructor) noexcept {
-    return scope_guard<std::decay_t<D>> {
-        std::forward<D>(destructor)
-    };
-}
-
-} // namespace ipc
\ No newline at end of file
diff --git a/src/libipc/utility/utility.h b/src/libipc/utility/utility.h
deleted file mode 100755
index 79424d95..00000000
--- a/src/libipc/utility/utility.h
+++ /dev/null
@@ -1,64 +0,0 @@
-#pragma once
-
-#include <utility>      // std::forward, std::integer_sequence
-#include <cstddef>      // std::size_t
-#include <new>          // std::hardware_destructive_interference_size
-#include <type_traits>  // std::is_trivially_copyable
-
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-
-template <typename F, typename D>
-constexpr decltype(auto) static_switch(std::size_t /*i*/, std::index_sequence<>, F&& /*f*/, D&& def) {
-    return std::forward<D>(def)();
-}
-
-template <typename F, typename D, std::size_t N, std::size_t...I>
-constexpr decltype(auto) static_switch(std::size_t i, std::index_sequence<N, I...>, F&& f, D&& def) {
-    return (i == N) ? std::forward<F>(f)(std::integral_constant<std::size_t, N>{}) :
-                      static_switch(i, std::index_sequence<I...>{}, std::forward<F>(f), std::forward<D>(def));
-}
-
-template <std::size_t N, typename F, typename D>
-constexpr decltype(auto) static_switch(std::size_t i, F&& f, D&& def) {
-    return static_switch(i, std::make_index_sequence<N>{}, std::forward<F>(f), std::forward<D>(def));
-}
-
-template <typename F, std::size_t...I>
-IPC_CONSTEXPR_ void static_for(std::index_sequence<I...>, F&& f) {
-    IPC_UNUSED_ auto expand = { (std::forward<F>(f)(std::integral_constant<std::size_t, I>{}), 0)... };
-}
-
-template <std::size_t N, typename F>
-IPC_CONSTEXPR_ void static_for(F&& f) {
-    static_for(std::make_index_sequence<N>{}, std::forward<F>(f));
-}
-
-// Minimum offset between two objects to avoid false sharing.
-enum {
-// #if __cplusplus >= 201703L
-//     cache_line_size = std::hardware_destructive_interference_size
-// #else /*__cplusplus < 201703L*/
-    cache_line_size = 64
-// #endif/*__cplusplus < 201703L*/
-};
-
-template <typename T, typename U>
-auto horrible_cast(U rhs) noexcept
-    -> typename std::enable_if<std::is_trivially_copyable<T>::value
-                            && std::is_trivially_copyable<U>::value, T>::type {
-    union {
-        T t;
-        U u;
-    } r = {};
-    r.u = rhs;
-    return r.t;
-}
-
-IPC_CONSTEXPR_ std::size_t make_align(std::size_t align, std::size_t size) {
-    // align must be 2^n
-    return (size + align - 1) & ~(align - 1);
-}
-
-} // namespace ipc
diff --git a/src/libipc/waiter.h b/src/libipc/waiter.h
deleted file mode 100644
index 2e13dc39..00000000
--- a/src/libipc/waiter.h
+++ /dev/null
@@ -1,81 +0,0 @@
-#pragma once
-
-#include <utility>
-#include <string>
-#include <mutex>
-#include <atomic>
-
-#include "libipc/def.h"
-#include "libipc/mutex.h"
-#include "libipc/condition.h"
-#include "libipc/platform/detail.h"
-
-namespace ipc {
-namespace detail {
-
-class waiter {
-    ipc::sync::condition cond_;
-    ipc::sync::mutex     lock_;
-    std::atomic<bool>    quit_ {false};
-
-public:
-    waiter() = default;
-    waiter(char const *name) {
-        open(name);
-    }
-
-    ~waiter() {
-        close();
-    }
-
-    bool valid() const noexcept {
-        return cond_.valid() && lock_.valid();
-    }
-
-    bool open(char const *name) noexcept {
-        quit_.store(false, std::memory_order_relaxed);
-        if (!cond_.open((std::string{"_waiter_cond_"} + name).c_str())) {
-            return false;
-        }
-        if (!lock_.open((std::string{"_waiter_lock_"} + name).c_str())) {
-            cond_.close();
-            return false;
-        }
-        return valid();
-    }
-
-    void close() noexcept {
-        cond_.close();
-        lock_.close();
-    }
-
-    template <typename F>
-    bool wait_if(F &&pred, std::uint64_t tm = ipc::invalid_value) noexcept {
-        IPC_UNUSED_ std::lock_guard<ipc::sync::mutex> guard {lock_};
-        while ([this, &pred] {
-                    return !quit_.load(std::memory_order_relaxed)
-                        && std::forward<F>(pred)();
-                }()) {
-            if (!cond_.wait(lock_, tm)) return false;
-        }
-        return true;
-    }
-
-    bool notify() noexcept {
-        std::lock_guard<ipc::sync::mutex>{lock_}; // barrier
-        return cond_.notify(lock_);
-    }
-
-    bool broadcast() noexcept {
-        std::lock_guard<ipc::sync::mutex>{lock_}; // barrier
-        return cond_.broadcast(lock_);
-    }
-
-    bool quit_waiting() {
-        quit_.store(true, std::memory_order_release);
-        return broadcast();
-    }
-};
-
-} // namespace detail
-} // namespace ipc
diff --git a/src/libipc/xmake.lua b/src/libipc/xmake.lua
new file mode 100644
index 00000000..a15966f9
--- /dev/null
+++ b/src/libipc/xmake.lua
@@ -0,0 +1,22 @@
+target("ipc")
+  if has_config("build_shared_lib") then
+    set_kind("shared")
+    add_defines("LIBIMP_LIBRARY_SHARED_BUILDING__")
+  else
+    set_kind("static")
+  end
+  add_deps("imp", "pmr")
+  if is_os("linux") then
+    add_syslinks("pthread", "rt")
+  elseif is_os("windows") then
+    add_syslinks("Advapi32")
+  end
+  on_config(config_target_compilation)
+  on_config(function (target)
+    if (not target:has_tool("cxx", "cl")) and has_config("build_shared_lib") then
+      target:add("linkgroups", "imp", "pmr", {whole = true})
+    end
+  end)
+  add_includedirs("$(projectdir)/include", {public = true})
+  add_includedirs("$(projectdir)/src")
+  add_files("$(projectdir)/src/libipc/**.cpp")
diff --git a/src/libpmr/CMakeLists.txt b/src/libpmr/CMakeLists.txt
new file mode 100644
index 00000000..976508aa
--- /dev/null
+++ b/src/libpmr/CMakeLists.txt
@@ -0,0 +1,32 @@
+project(pmr)
+
+if(NOT MSVC)
+  add_compile_options(
+    -Wno-attributes)
+endif()
+
+aux_source_directory(${LIBIPC_PROJECT_DIR}/src/libpmr SRC_FILES)
+
+file(GLOB HEAD_FILES
+  ${LIBIPC_PROJECT_DIR}/include/libpmr/*.h)
+
+add_library(${PROJECT_NAME} STATIC ${SRC_FILES} ${HEAD_FILES})
+
+# set output directory
+set_target_properties(${PROJECT_NAME}
+	PROPERTIES
+	ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib"
+	RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
+
+target_include_directories(${PROJECT_NAME}
+  PUBLIC  ${LIBIPC_PROJECT_DIR}/include
+  PRIVATE ${LIBIPC_PROJECT_DIR}/src)
+
+target_link_libraries(${PROJECT_NAME} PUBLIC imp)
+
+install(
+  TARGETS ${PROJECT_NAME}
+  RUNTIME DESTINATION bin
+  LIBRARY DESTINATION lib
+  ARCHIVE DESTINATION lib)
diff --git a/src/libpmr/allocator.cpp b/src/libpmr/allocator.cpp
new file mode 100644
index 00000000..4f91848e
--- /dev/null
+++ b/src/libpmr/allocator.cpp
@@ -0,0 +1,46 @@
+
+#include <algorithm>  // std::swap
+
+#include "libimp/log.h"
+#include "libpmr/allocator.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+allocator::holder_mr_base &allocator::get_holder() noexcept {
+  return *reinterpret_cast<holder_mr_base *>(holder_.data());
+}
+
+allocator::holder_mr_base const &allocator::get_holder() const noexcept {
+  return *reinterpret_cast<holder_mr_base const *>(holder_.data());
+}
+
+allocator::allocator() noexcept
+  : allocator(new_delete_resource::get()) {}
+
+allocator::~allocator() noexcept {
+  ::LIBIMP::destroy(&get_holder());
+}
+
+void allocator::swap(allocator &other) noexcept {
+  std::swap(this->holder_, other.holder_);
+}
+
+void *allocator::allocate(std::size_t s, std::size_t a) const {
+  LIBIMP_LOG_();
+  if ((a & (a - 1)) != 0) {
+    log.error("failed: allocate alignment is not a power of 2.");
+    return nullptr;
+  }
+  return get_holder().alloc(s, a);
+}
+
+void allocator::deallocate(void *p, std::size_t s, std::size_t a) const {
+  LIBIMP_LOG_();
+  if ((a & (a - 1)) != 0) {
+    log.error("failed: allocate alignment is not a power of 2.");
+    return;
+  }
+  get_holder().dealloc(p, s, a);
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/block_pool.cpp b/src/libpmr/block_pool.cpp
new file mode 100644
index 00000000..94fa2637
--- /dev/null
+++ b/src/libpmr/block_pool.cpp
@@ -0,0 +1,42 @@
+
+#include <mutex>
+
+#include "libimp/detect_plat.h"
+
+#include "libpmr/block_pool.h"
+#include "libpmr/monotonic_buffer_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+class thread_safe_resource : public monotonic_buffer_resource {
+public:
+  thread_safe_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept
+      : monotonic_buffer_resource(buffer) {}
+
+  ~thread_safe_resource() noexcept {
+    LIBIMP_UNUSED std::lock_guard<std::mutex> lock(mutex_);
+    monotonic_buffer_resource::release();
+  }
+
+  void *allocate(std::size_t bytes, std::size_t alignment) noexcept {
+    LIBIMP_UNUSED std::lock_guard<std::mutex> lock(mutex_);
+    return monotonic_buffer_resource::allocate(bytes, alignment);
+  }
+
+  void deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
+    LIBIMP_UNUSED std::lock_guard<std::mutex> lock(mutex_);
+    monotonic_buffer_resource::deallocate(p, bytes, alignment);
+  }
+
+private:
+  std::mutex mutex_;
+};
+
+allocator &central_cache_allocator() noexcept {
+  static std::array<::LIBIMP::byte, central_cache_default_size> buf;
+  static thread_safe_resource res(buf);
+  static allocator a(&res);
+  return a;
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/memory_resource.cpp b/src/libpmr/memory_resource.cpp
new file mode 100644
index 00000000..1ac95ebe
--- /dev/null
+++ b/src/libpmr/memory_resource.cpp
@@ -0,0 +1,101 @@
+
+#include <cstdlib>  // std::aligned_alloc
+
+#include "libimp/detect_plat.h"
+#include "libimp/system.h"
+#include "libimp/log.h"
+#include "libimp/aligned.h"
+
+#include "libpmr/memory_resource.h"
+
+#include "verify_args.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \brief Returns a pointer to a new_delete_resource.
+ * 
+ * \return new_delete_resource* 
+ */
+new_delete_resource *new_delete_resource::get() noexcept {
+  static new_delete_resource mem_res;
+  return &mem_res;
+}
+
+/**
+ * \brief Allocates storage with a size of at least bytes bytes, aligned to the specified alignment.
+ * Alignment shall be a power of two.
+ * 
+ * \see https://en.cppreference.com/w/cpp/memory/memory_resource/do_allocate
+ *      https://www.cppstories.com/2019/08/newnew-align/
+ * 
+ * \return void * - nullptr if storage of the requested size and alignment cannot be obtained.
+ */
+void *new_delete_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
+  LIBIMP_LOG_();
+  if (!verify_args(bytes, alignment)) {
+    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
+    return nullptr;
+  }
+#if defined(LIBIMP_CPP_17)
+  /// \see https://en.cppreference.com/w/cpp/memory/c/aligned_alloc
+  /// \remark The size parameter must be an integral multiple of alignment.
+  return std::aligned_alloc(alignment, ::LIBIMP::round_up(bytes, alignment));
+#else
+  if (alignment <= alignof(std::max_align_t)) {
+    /// \see https://en.cppreference.com/w/cpp/memory/c/malloc
+    return std::malloc(bytes);
+  }
+#if defined(LIBIMP_OS_WIN)
+  /// \see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-malloc
+  return ::_aligned_malloc(bytes, alignment);
+#else // try posix
+  /// \see https://pubs.opengroup.org/onlinepubs/9699919799/functions/posix_memalign.html
+  void *p = nullptr;
+  int ret = ::posix_memalign(&p, alignment, bytes);
+  if (ret != 0) {
+    log.error("failed: posix_memalign(alignment = ", alignment, 
+                                       ", bytes = ", bytes, 
+                                      "). error = ", sys::error(ret));
+    return nullptr;
+  }
+  return p;
+#endif
+#endif // defined(LIBIMP_CPP_17)
+}
+
+/**
+ * \brief Deallocates the storage pointed to by p.
+ * The storage it points to must not yet have been deallocated, otherwise the behavior is undefined.
+ * 
+ * \see https://en.cppreference.com/w/cpp/memory/memory_resource/do_deallocate
+ * 
+ * \param p must have been returned by a prior call to new_delete_resource::do_allocate(bytes, alignment).
+ */
+void new_delete_resource::deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
+  LIBIMP_LOG_();
+  if (p == nullptr) {
+    return;
+  }
+  if (!verify_args(bytes, alignment)) {
+    log.error("invalid bytes = ", bytes, ", alignment = ", alignment);
+    return;
+  }
+#if defined(LIBIMP_CPP_17)
+  /// \see https://en.cppreference.com/w/cpp/memory/c/free
+  std::free(p);
+#else
+  if (alignment <= alignof(std::max_align_t)) {
+    std::free(p);
+    return;
+  }
+#if defined(LIBIMP_OS_WIN)
+  /// \see https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/aligned-free
+  ::_aligned_free(p);
+#else // try posix
+  ::free(p);
+#endif
+#endif // defined(LIBIMP_CPP_17)
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/monotonic_buffer_resource.cpp b/src/libpmr/monotonic_buffer_resource.cpp
new file mode 100644
index 00000000..72be867c
--- /dev/null
+++ b/src/libpmr/monotonic_buffer_resource.cpp
@@ -0,0 +1,139 @@
+
+#include <utility>
+#include <memory>
+#include <algorithm>
+
+#include "libimp/log.h"
+#include "libimp/aligned.h"
+#include "libimp/detect_plat.h"
+
+#include "libpmr/monotonic_buffer_resource.h"
+
+LIBPMR_NAMESPACE_BEG_
+namespace {
+
+template <typename Node>
+Node *make_node(allocator const &upstream, std::size_t initial_size, std::size_t alignment) noexcept {
+  LIBIMP_LOG_();
+  auto sz = ::LIBIMP::round_up(sizeof(Node), alignment) + initial_size;
+  LIBIMP_TRY {
+    auto *node = static_cast<Node *>(upstream.allocate(sz));
+    if (node == nullptr) {
+      log.error("failed: allocate memory for `monotonic_buffer_resource`'s node.", 
+                " bytes = ", initial_size, ", alignment = ", alignment);
+      return nullptr;
+    }
+    node->next = nullptr;
+    node->size = sz;
+    return node;
+  } LIBIMP_CATCH(...) {
+    log.error("failed: allocate memory for `monotonic_buffer_resource`'s node.", 
+              " bytes = ", initial_size, ", alignment = ", alignment,
+              "\n\texception: ", ::LIBIMP::log::exception_string(std::current_exception()));
+    return nullptr;
+  }
+}
+
+std::size_t next_buffer_size(std::size_t size) noexcept {
+  return size * 3 / 2;
+}
+
+} // namespace
+
+monotonic_buffer_resource::monotonic_buffer_resource() noexcept
+  : monotonic_buffer_resource(allocator{}) {}
+
+monotonic_buffer_resource::monotonic_buffer_resource(allocator upstream) noexcept
+  : monotonic_buffer_resource(0, std::move(upstream)) {}
+
+monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size) noexcept
+  : monotonic_buffer_resource(initial_size, allocator{}) {}
+
+monotonic_buffer_resource::monotonic_buffer_resource(std::size_t initial_size, allocator upstream) noexcept
+  : upstream_      (std::move(upstream))
+  , free_list_     (nullptr)
+  , head_          (nullptr)
+  , tail_          (nullptr)
+  , next_size_     (initial_size)
+  , initial_buffer_(nullptr)
+  , initial_size_  (initial_size) {}
+
+monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer) noexcept
+  : monotonic_buffer_resource(buffer, allocator{}) {}
+
+monotonic_buffer_resource::monotonic_buffer_resource(::LIBIMP::span<::LIBIMP::byte> buffer, allocator upstream) noexcept
+  : upstream_      (std::move(upstream))
+  , free_list_     (nullptr)
+  , head_          (buffer.begin())
+  , tail_          (buffer.end())
+  , next_size_     (next_buffer_size(buffer.size()))
+  , initial_buffer_(buffer.begin())
+  , initial_size_  (buffer.size()) {}
+
+monotonic_buffer_resource::~monotonic_buffer_resource() noexcept {
+  release();
+}
+
+allocator monotonic_buffer_resource::upstream_resource() const noexcept {
+  return upstream_;
+}
+
+void monotonic_buffer_resource::release() noexcept {
+  LIBIMP_LOG_();
+  LIBIMP_TRY {
+    while (free_list_ != nullptr) {
+      auto *next = free_list_->next;
+      upstream_.deallocate(free_list_, free_list_->size);
+      free_list_ = next;
+    }
+  } LIBIMP_CATCH(...) {
+    log.error("failed: deallocate memory for `monotonic_buffer_resource`.",
+              "\n\texception: ", ::LIBIMP::log::exception_string(std::current_exception()));
+  }
+  // reset to initial state at contruction
+  if ((head_ = initial_buffer_) != nullptr) {
+    tail_ = head_ + initial_size_;
+    next_size_ = next_buffer_size(initial_size_);
+  } else {
+    tail_ = nullptr;
+    next_size_ = initial_size_;
+  }
+}
+
+void *monotonic_buffer_resource::allocate(std::size_t bytes, std::size_t alignment) noexcept {
+  LIBIMP_LOG_();
+  if (bytes == 0) {
+    log.error("failed: allocate bytes = 0.");
+    return nullptr;
+  }
+  void *p = head_;
+  auto  s = static_cast<std::size_t>(tail_ - head_);
+  if (std::align(alignment, bytes, p, s) == nullptr) {
+    next_size_ = (std::max)(next_size_, bytes);
+    auto *node = make_node<monotonic_buffer_resource::node>(upstream_, next_size_, alignment);
+    if (node == nullptr) return nullptr;
+    node->next = free_list_;
+    free_list_ = node;
+    next_size_ = next_buffer_size(next_size_);
+    // try again
+    s = node->size - sizeof(monotonic_buffer_resource::node);
+    p = std::align(alignment, bytes, (p = node + 1), s);
+    if (p == nullptr) {
+      log.error("failed: allocate memory for `monotonic_buffer_resource`.", 
+                " bytes = ", bytes, ", alignment = ", alignment);
+      return nullptr;
+    }
+    tail_ = static_cast<::LIBIMP::byte *>(p) + s;
+  }
+  head_ = static_cast<::LIBIMP::byte *>(p) + bytes;
+  return p;
+}
+
+void monotonic_buffer_resource::deallocate(void *p, std::size_t bytes, std::size_t alignment) noexcept {
+  static_cast<void>(p);
+  static_cast<void>(bytes);
+  static_cast<void>(alignment);
+  // Do nothing.
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/verify_args.h b/src/libpmr/verify_args.h
new file mode 100644
index 00000000..fceaccf5
--- /dev/null
+++ b/src/libpmr/verify_args.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <cstddef>
+
+#include "libpmr/def.h"
+
+LIBPMR_NAMESPACE_BEG_
+
+/**
+ * \brief Check that bytes is not 0 and that the alignment is a power of two.
+ */
+inline bool verify_args(std::size_t bytes, std::size_t alignment) noexcept {
+  if (bytes == 0) {
+    return false;
+  }
+  if ((alignment == 0) || (alignment & (alignment - 1)) != 0) {
+    return false;
+  }
+  return true;
+}
+
+LIBPMR_NAMESPACE_END_
diff --git a/src/libpmr/xmake.lua b/src/libpmr/xmake.lua
new file mode 100644
index 00000000..02ccfe20
--- /dev/null
+++ b/src/libpmr/xmake.lua
@@ -0,0 +1,7 @@
+target("pmr")
+  set_kind("static")
+  add_deps("imp")
+  on_config(config_target_compilation)
+  add_includedirs("$(projectdir)/include", {public = true})
+  add_includedirs("$(projectdir)/src")
+  add_files("$(projectdir)/src/libpmr/**.cpp")
diff --git a/src/xmake.lua b/src/xmake.lua
new file mode 100644
index 00000000..6182196b
--- /dev/null
+++ b/src/xmake.lua
@@ -0,0 +1 @@
+includes("libimp", "libpmr", "libipc")
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 9398aa30..bbd37cd9 100755
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -6,23 +6,39 @@ if(NOT MSVC)
     -Wno-missing-field-initializers 
     -Wno-unused-variable 
     -Wno-unused-function)
+else()
+  add_compile_options(
+    /wd4723)
+endif()
+
+FetchContent_Declare(googletest
+  GIT_REPOSITORY https://github.com/google/googletest.git
+  GIT_TAG        v1.12.0
+)
+set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
+if (LIBIPC_USE_STATIC_CRT)
+  set(gtest_force_shared_crt OFF CACHE BOOL "" FORCE)
+else()
+  set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
 endif()
+FetchContent_MakeAvailable(googletest)
 
 include_directories(
-    ${LIBIPC_PROJECT_DIR}/include 
-    ${LIBIPC_PROJECT_DIR}/src
-    ${LIBIPC_PROJECT_DIR}/test
-    ${LIBIPC_PROJECT_DIR}/3rdparty
-    ${LIBIPC_PROJECT_DIR}/3rdparty/gtest/include)
+  ${LIBIPC_PROJECT_DIR}/include 
+  ${LIBIPC_PROJECT_DIR}/src
+  ${LIBIPC_PROJECT_DIR}/test)
 
 file(GLOB SRC_FILES
-    ${LIBIPC_PROJECT_DIR}/test/*.cpp
-    # ${LIBIPC_PROJECT_DIR}/test/profiler/*.cpp
-    )
-file(GLOB HEAD_FILES ${LIBIPC_PROJECT_DIR}/test/*.h)
+  ${LIBIPC_PROJECT_DIR}/test/imp/*.cpp
+  ${LIBIPC_PROJECT_DIR}/test/pmr/*.cpp
+  ${LIBIPC_PROJECT_DIR}/test/concur/*.cpp
+  ${LIBIPC_PROJECT_DIR}/test/ipc/*.cpp)
+
+file(GLOB HEAD_FILES
+  ${LIBIPC_PROJECT_DIR}/test/*.h)
 
 add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEAD_FILES})
 
-link_directories(${LIBIPC_PROJECT_DIR}/3rdparty/gperftools)
-target_link_libraries(${PROJECT_NAME} gtest gtest_main ipc)
-#target_link_libraries(${PROJECT_NAME} tcmalloc_minimal)
+target_link_libraries(${PROJECT_NAME} 
+  gtest_main 
+  imp pmr ipc)
diff --git a/test/concur/test_concur_bus.cpp b/test/concur/test_concur_bus.cpp
new file mode 100644
index 00000000..b2933df7
--- /dev/null
+++ b/test/concur/test_concur_bus.cpp
@@ -0,0 +1,8 @@
+
+#include "gtest/gtest.h"
+
+#include "libconcur/bus.h"
+#include "libimp/span.h"
+
+TEST(bus, construct) {
+}
\ No newline at end of file
diff --git a/test/concur/test_concur_circular_queue.cpp b/test/concur/test_concur_circular_queue.cpp
new file mode 100644
index 00000000..54fc1c84
--- /dev/null
+++ b/test/concur/test_concur_circular_queue.cpp
@@ -0,0 +1,161 @@
+
+#include <cstdint>
+#include <cstddef>
+#include <atomic>
+#include <array>
+#include <thread>
+
+#include "gtest/gtest.h"
+
+#include "libconcur/circular_queue.h"
+#include "libimp/log.h"
+#include "libimp/nameof.h"
+
+using namespace concur;
+
+TEST(circular_queue, construct) {
+  using queue_t = circular_queue<int>;
+  queue_t q1;
+  EXPECT_TRUE(q1.valid());
+  EXPECT_TRUE(q1.empty());
+  EXPECT_EQ(q1.approx_size(), 0);
+}
+
+namespace {
+
+template <typename PR, typename CR>
+void test_queue_basic() {
+  using queue_t = circular_queue<int, PR, CR>;
+  queue_t q1;
+  EXPECT_TRUE(q1.valid());
+  EXPECT_TRUE(q1.empty());
+  EXPECT_EQ(q1.approx_size(), 0);
+
+  EXPECT_TRUE(q1.push(1));
+  EXPECT_FALSE(q1.empty());
+  EXPECT_EQ(q1.approx_size(), 1);
+
+  int value;
+  EXPECT_TRUE(q1.pop(value));
+  EXPECT_EQ(value, 1);
+  EXPECT_TRUE(q1.empty());
+  EXPECT_EQ(q1.approx_size(), 0);
+
+  int count = 0;
+  auto push = [&q1, &count](int i) {
+    ASSERT_TRUE(q1.push(i));
+    ASSERT_FALSE(q1.empty());
+    ++count;
+    ASSERT_EQ(q1.approx_size(), count);
+  };
+  auto pop = [&q1, &count](int i) {
+    int value;
+    ASSERT_TRUE(q1.pop(value));
+    ASSERT_EQ(value, i);
+    --count;
+    ASSERT_EQ(q1.approx_size(), count);
+  };
+
+  for (int i = 0; i < 1000; ++i) {
+    push(i);
+  }
+  for (int i = 0; i < 1000; ++i) {
+    pop(i);
+  }
+
+  for (int i = 0; i < default_circle_buffer_size; ++i) {
+    push(i);
+  }
+  ASSERT_FALSE(q1.push(65536));
+  for (int i = 0; i < default_circle_buffer_size; ++i) {
+    pop(i);
+  }
+}
+
+} // namespace
+
+TEST(circular_queue, push_pop) {
+  test_queue_basic<relation::single, relation::single>();
+  test_queue_basic<relation::single, relation::multi >();
+  test_queue_basic<relation::multi , relation::multi >();
+}
+
+namespace {
+
+template <typename PR, typename CR>
+void test_queue(std::size_t np, std::size_t nc) {
+  LIBIMP_LOG_();
+  log.info("\n\tStart with: [", imp::nameof<PR>(), " - ", imp::nameof<CR>(), "]\n\t\t", np, " producers, ", nc, " consumers...");
+
+  struct Data {
+    std::uint64_t n;
+    std::uint64_t i;
+  };
+  circular_queue<Data, PR, CR> que;
+
+  static constexpr std::uint32_t loop_size = 10'0000;
+
+  std::atomic<std::uint64_t> sum {0};
+  std::atomic<std::size_t> running {np};
+
+  auto prod_call = [&](std::size_t n) {
+    for (std::uint32_t i = 1; i <= loop_size; ++i) {
+      std::this_thread::yield();
+      for (std::uint32_t k = 1; !que.push(Data{n, i}); ++k) {
+        std::this_thread::yield();
+        if (k % (loop_size / 10) == 0) {
+          log.info("[", n, "] put count: ", i, ", retry: ", k);
+          std::this_thread::sleep_for(std::chrono::milliseconds(1));
+        }
+      }
+      if (i % (loop_size / 10) == 0) {
+        log.info("[", n, "] put count: ", i);
+      }
+    }
+    --running;
+  };
+  auto cons_call = [&] {
+    for (;;) {
+      std::this_thread::yield();
+      Data v;
+      while (!que.pop(v)) {
+        if (running == 0) return;
+        std::this_thread::yield();
+      }
+      sum += v.i;
+    }
+  };
+
+  std::vector<std::thread> prods(np);
+  for (std::size_t n = 0; n < np; ++n) prods[n] = std::thread(prod_call, n);
+  std::vector<std::thread> conss(nc);
+  for (auto &c : conss) c = std::thread(cons_call);
+
+  for (auto &p : prods) p.join();
+  for (auto &c : conss) c.join();
+
+  EXPECT_EQ(sum, np * (loop_size * std::uint64_t(loop_size + 1)) / 2);
+}
+
+} // namespace
+
+TEST(circular_queue, multi_thread) {
+  using namespace concur;
+
+  /// \brief 1-1
+  test_queue<relation::single, relation::single>(1, 1);
+  test_queue<relation::single, relation::multi >(1, 1);
+  test_queue<relation::multi , relation::single>(1, 1);
+  test_queue<relation::multi , relation::multi >(1, 1);
+
+  /// \brief 8-1
+  test_queue<relation::multi , relation::single>(8, 1);
+  test_queue<relation::multi , relation::multi >(8, 1);
+
+  /// \brief 1-8
+  test_queue<relation::single, relation::multi >(1, 8);
+  test_queue<relation::multi , relation::multi >(1, 8);
+
+  /// \brief 8-8
+  test_queue<relation::multi , relation::multi >(8, 8);
+}
diff --git a/test/concur/test_concur_concurrent.cpp b/test/concur/test_concur_concurrent.cpp
new file mode 100644
index 00000000..214f89a1
--- /dev/null
+++ b/test/concur/test_concur_concurrent.cpp
@@ -0,0 +1,373 @@
+
+#include <iostream>
+#include <thread>
+#include <vector>
+#include <atomic>
+#include <typeinfo>
+#include <cstddef>
+
+#include "gtest/gtest.h"
+
+#include "libconcur/concurrent.h"
+#include "libimp/countof.h"
+#include "libimp/log.h"
+#include "libimp/nameof.h"
+
+#include "test_util.h"
+
+TEST(concurrent, cache_line_size) {
+  std::cout << concur::cache_line_size << "\n";
+  EXPECT_TRUE(concur::cache_line_size >= alignof(std::max_align_t));
+}
+
+TEST(concurrent, index_and_flag) {
+  EXPECT_TRUE(sizeof(concur::index_t) < sizeof(concur::state::flag_t));
+}
+
+TEST(concurrent, trunc_index) {
+  struct header {
+    concur::index_t circ_size;
+
+    bool valid() const noexcept {
+      return (circ_size > 1) && ((circ_size & (circ_size - 1)) == 0);
+    }
+  };
+
+  /// \brief circ-size = 0
+  EXPECT_EQ(concur::trunc_index(header{0}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(header{0}, -1), 0);
+
+  /// \brief circ-size = 1
+  EXPECT_EQ(concur::trunc_index(header{1}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(header{1}, -1), 0);
+
+  /// \brief circ-size = 2
+  EXPECT_EQ(concur::trunc_index(header{2}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{2}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(header{2}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{2}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{2}, 111), 1);
+  EXPECT_EQ(concur::trunc_index(header{2}, -1), 1);
+
+  /// \brief circ-size = 10
+  EXPECT_EQ(concur::trunc_index(header{10}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(header{10}, -1), 0);
+
+  /// \brief circ-size = 16
+  EXPECT_EQ(concur::trunc_index(header{16}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{16}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(header{16}, 2), 2);
+  EXPECT_EQ(concur::trunc_index(header{16}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{16}, 111), 15);
+  EXPECT_EQ(concur::trunc_index(header{16}, -1), 15);
+
+  /// \brief circ-size = (index_t)-1
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 1), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 2), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 16), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, 111), 0);
+  EXPECT_EQ(concur::trunc_index(header{(concur::index_t)-1}, -1), 0);
+
+  /// \brief circ-size = 2147483648 (2^31)
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 0), 0);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 1), 1);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 2), 2);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 16), 16);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, 111), 111);
+  EXPECT_EQ(concur::trunc_index(header{2147483648u}, -1), 2147483647);
+}
+
+namespace {
+
+template <typename PC>
+void test_unicast(std::size_t np, std::size_t nc) {
+  LIBIMP_LOG_();
+  log.info("\n\tStart with: ", imp::nameof<PC>(), ", ", np, " producers, ", nc, " consumers...");
+
+  static constexpr std::uint32_t loop_size = 100'0000;
+
+  concur::element<std::uint64_t> circ[32] {};
+  PC pc;
+  typename concur::traits<PC>::header hdr {imp::make_span(circ)};
+  ASSERT_TRUE(hdr.valid());
+
+  std::atomic<std::uint64_t> sum {0};
+  std::atomic<std::size_t> running {np};
+
+  auto prod_call = [&](std::size_t n) {
+    typename concur::traits<PC>::context ctx {};
+    for (std::uint32_t i = 1; i <= loop_size; ++i) {
+      std::this_thread::yield();
+      while (!pc.enqueue(imp::make_span(circ), hdr, ctx, i)) {
+        std::this_thread::yield();
+      }
+      if (i % (loop_size / 10) == 0) {
+        log.info("[", n, "] put count: ", i);
+      }
+    }
+    --running;
+  };
+  auto cons_call = [&] {
+    typename concur::traits<PC>::context ctx {};
+    for (;;) {
+      std::this_thread::yield();
+      std::uint64_t v;
+      while (!pc.dequeue(imp::make_span(circ), hdr, ctx, v)) {
+        if (running == 0) return;
+        std::this_thread::yield();
+      }
+      sum += v;
+    }
+  };
+
+  std::vector<std::thread> prods(np);
+  for (std::size_t n = 0; n < np; ++n) prods[n] = std::thread(prod_call, n);
+  std::vector<std::thread> conss(nc);
+  for (auto &c : conss) c = std::thread(cons_call);
+
+  for (auto &p : prods) p.join();
+  for (auto &c : conss) c.join();
+
+  EXPECT_EQ(sum, np * (loop_size * std::uint64_t(loop_size + 1)) / 2);
+}
+
+} // namespace
+
+TEST(concurrent, unicast) {
+  using namespace concur;
+
+  /// \brief 1-1
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::single>>(1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::single>>(1, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 1);
+
+  /// \brief 8-1
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::single>>(8, 1);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 1);
+
+  /// \brief 1-8
+  test_unicast<prod_cons<trans::unicast, relation::single, relation::multi >>(1, 8);
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(1, 8);
+
+  /// \brief 8-8
+  test_unicast<prod_cons<trans::unicast, relation::multi , relation::multi >>(8, 8);
+}
+
+namespace {
+
+template <typename PC>
+void test_broadcast(std::size_t np, std::size_t nc) {
+  LIBIMP_LOG_();
+  {
+    concur::element<std::uint64_t> circ[32] {};
+    PC pc;
+    typename concur::traits<PC>::header hdr {imp::make_span(circ)};
+    ASSERT_TRUE(hdr.valid());
+
+    auto push_one = [&, ctx = typename concur::traits<PC>::context{}](std::uint32_t i) mutable {
+      return pc.enqueue(imp::make_span(circ), hdr, ctx, i);
+    };
+    auto pop_one = [&, ctx = typename concur::traits<PC>::context{}]() mutable {
+      std::uint64_t i;
+      if (pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
+        return i;
+      }
+      return (std::uint64_t)-1;
+    };
+    auto pop_one_2 = pop_one;
+
+    // empty queue pop
+    ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+
+    // test one push & pop
+    for (int i = 0; i < 32; ++i) {
+      ASSERT_TRUE(push_one(i));
+      ASSERT_EQ(pop_one(), i);
+    }
+    for (int i = 0; i < 100; ++i) {
+      ASSERT_TRUE(push_one(i));
+      ASSERT_EQ(pop_one(), i);
+    }
+    ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+
+    // test loop push & pop
+    for (int i = 0; i < 10; ++i) ASSERT_TRUE(push_one(i));
+    for (int i = 0; i < 10; ++i) ASSERT_EQ(pop_one(), i);
+    ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+
+    // other loop pop
+    for (int i = 0; i < 32; ++i) ASSERT_TRUE(push_one(i));
+    for (int i = 0; i < 32; ++i) ASSERT_EQ(pop_one_2(), i);
+    ASSERT_EQ(pop_one_2(), (std::uint64_t)-1);
+
+    // overwrite
+    ASSERT_TRUE(push_one(123));
+    for (int i = 1; i < 32; ++i) {
+      ASSERT_EQ(pop_one(), i);
+    }
+    ASSERT_EQ(pop_one(), 123);
+    ASSERT_EQ(pop_one(), (std::uint64_t)-1);
+  }
+
+  log.info("\n\tStart with: ", imp::nameof<PC>(), ", ", np, " producers, ", nc, " consumers...");
+  {
+    struct Data {
+      std::uint64_t n;
+      std::uint64_t i;
+    };
+    concur::element<Data> circ[256] {};
+    PC pc;
+    typename concur::traits<PC>::header hdr {imp::make_span(circ)};
+    ASSERT_TRUE(hdr.valid());
+
+    static constexpr std::uint32_t loop_size = 10'0000;
+
+    std::atomic<std::uint64_t> sum {0};
+    std::atomic<std::size_t> running {np};
+    std::array<std::atomic<std::size_t>, 64> counters {};
+
+    auto prod_call = [&](std::size_t n) {
+      typename concur::traits<PC>::context ctx {};
+      for (std::uint32_t i = 1; i <= loop_size; ++i) {
+        std::this_thread::yield();
+        counters[n] = 0;
+        for (std::uint32_t k = 1;; ++k) {
+          ASSERT_TRUE(pc.enqueue(imp::make_span(circ), hdr, ctx, Data{n, i}));
+          // We need to wait for the consumer to consume the data.
+          if (counters[n] >= nc) {
+            break;
+          }
+          std::this_thread::yield();
+          if (k % (loop_size / 10) == 0) {
+            log.info("[", n, "] put count: ", i, ", retry: ", k, ", counter: ", counters[n]);
+            std::this_thread::sleep_for(std::chrono::milliseconds(1));
+          }
+        }
+        if (i % (loop_size / 10) == 0) {
+          log.info("[", n, "] put count: ", i);
+        }
+      }
+      --running;
+    };
+    auto cons_call = [&] {
+      typename concur::traits<PC>::context ctx {};
+      std::array<std::uint64_t, 64> last_i {};
+      for (;;) {
+        std::this_thread::yield();
+        Data v;
+        while (!pc.dequeue(imp::make_span(circ), hdr, ctx, v)) {
+          if (running == 0) return;
+          std::this_thread::yield();
+        }
+        // The v.i variable always increases.
+        if (last_i[(std::size_t)v.n] != (v.i - 1)) {
+          continue;
+        }
+        last_i[(std::size_t)v.n] = v.i;
+        sum += v.i;
+        ++counters[(std::size_t)v.n];
+      }
+    };
+
+    std::vector<std::thread> prods(np);
+    for (std::size_t n = 0; n < np; ++n) prods[n] = std::thread(prod_call, n);
+    std::vector<std::thread> conss(nc);
+    for (auto &c : conss) c = std::thread(cons_call);
+
+    for (auto &p : prods) p.join();
+    for (auto &c : conss) c.join();
+
+    EXPECT_EQ(sum, np * nc * (loop_size * std::uint64_t(loop_size + 1)) / 2);
+  }
+}
+
+} // namespace
+
+TEST(concurrent, broadcast) {
+  using namespace concur;
+
+  /// \brief 1-1
+  test_broadcast<prod_cons<trans::broadcast, relation::single, relation::multi>>(1, 1);
+  test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(1, 1);
+
+  /// \brief 8-1
+  test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(8, 1);
+
+  /// \brief 1-8
+  test_broadcast<prod_cons<trans::broadcast, relation::single, relation::multi>>(1, 8);
+  test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(1, 8);
+
+  /// \brief 8-8
+  test_broadcast<prod_cons<trans::broadcast, relation::multi , relation::multi>>(8, 8);
+}
+
+TEST(concurrent, broadcast_multi_dirtywrite) {
+  using namespace concur;
+
+  struct data {
+    std::uint64_t n;
+
+    data &operator=(test::latch &l) noexcept {
+      l.arrive_and_wait();
+      std::this_thread::sleep_for(std::chrono::milliseconds(10));
+      n = 1;
+      return *this;
+    }
+
+    data &operator=(data const &rhs) noexcept {
+      n = rhs.n;
+      return *this;
+    }
+  };
+
+  element<data> circ[2] {};
+  prod_cons<trans::broadcast, relation::multi, relation::multi> pc;
+  typename traits<decltype(pc)>::header hdr {imp::make_span(circ)};
+
+  auto push_one = [&, ctx = typename concur::traits<decltype(pc)>::context{}](auto &&i) mutable {
+    return pc.enqueue(imp::make_span(circ), hdr, ctx, i);
+  };
+  auto pop_one = [&, ctx = typename concur::traits<decltype(pc)>::context{}]() mutable {
+    data i;
+    if (pc.dequeue(imp::make_span(circ), hdr, ctx, i)) {
+      return i;
+    }
+    return data{0};
+  };
+
+  test::latch l(2);
+  std::thread t[2];
+  t[0] = std::thread([&] {
+    push_one(l); // 1
+  });
+  t[1] = std::thread([&] {
+    l.arrive_and_wait();
+    push_one(data{3});
+    push_one(data{2}); // dirty write
+  });
+
+  for (int i = 0; i < 2; ++i) {
+    t[i].join();
+  }
+  std::set<std::uint64_t> s{1, 2, 3};
+  for (int i = 0; i < 2; ++i) {
+    auto d = pop_one();
+    EXPECT_TRUE(s.find(d.n) != s.end());
+    s.erase(d.n);
+  }
+  EXPECT_TRUE(s.find(3) == s.end());
+}
diff --git a/test/concur/test_concur_stack.cpp b/test/concur/test_concur_stack.cpp
new file mode 100644
index 00000000..33544c1a
--- /dev/null
+++ b/test/concur/test_concur_stack.cpp
@@ -0,0 +1,101 @@
+
+#include "gtest/gtest.h"
+
+#define private public
+#include "libconcur/intrusive_stack.h"
+
+TEST(intrusive_stack, construct) {
+  concur::intrusive_stack<int> s;
+  EXPECT_TRUE(s.empty());
+}
+
+TEST(intrusive_stack, construct_node) {
+  concur::intrusive_stack<int>::node n{};
+  EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
+}
+
+TEST(intrusive_stack, copyable) {
+  EXPECT_FALSE(std::is_copy_constructible<concur::intrusive_stack<int>>::value);
+  EXPECT_FALSE(std::is_copy_assignable<concur::intrusive_stack<int>>::value);
+}
+
+TEST(intrusive_stack, moveable) {
+  EXPECT_FALSE(std::is_move_constructible<concur::intrusive_stack<int>>::value);
+  EXPECT_FALSE(std::is_move_assignable<concur::intrusive_stack<int>>::value);
+}
+
+TEST(intrusive_stack, push_one) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n{123};
+  s.push(&n);
+  EXPECT_FALSE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == &n);
+  EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_EQ(n.value, 123);
+}
+
+TEST(intrusive_stack, push_many) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n1{111111};
+  concur::intrusive_stack<int>::node n2{222222};
+  concur::intrusive_stack<int>::node n3{333333};
+  s.push(&n1);
+  s.push(&n2);
+  s.push(&n3);
+  EXPECT_FALSE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == &n3);
+  EXPECT_TRUE(n3.next.load(std::memory_order_relaxed) == &n2);
+  EXPECT_TRUE(n2.next.load(std::memory_order_relaxed) == &n1);
+  EXPECT_TRUE(n1.next.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_EQ(n1.value, 111111);
+  EXPECT_EQ(n2.value, 222222);
+  EXPECT_EQ(n3.value, 333333);
+}
+
+TEST(intrusive_stack, push_same) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n{321};
+  s.push(&n);
+  s.push(&n);
+  EXPECT_FALSE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == &n);
+  EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == &n);
+  EXPECT_EQ(n.value, 321);
+}
+
+TEST(intrusive_stack, pop_empty) {
+  concur::intrusive_stack<int> s;
+  EXPECT_TRUE(s.pop() == nullptr);
+}
+
+TEST(intrusive_stack, pop_one) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n{112233};
+  s.push(&n);
+  EXPECT_TRUE(s.pop() == &n);
+  EXPECT_TRUE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_TRUE(n.next.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_EQ(n.value, 112233);
+}
+
+TEST(intrusive_stack, pop_many) {
+  concur::intrusive_stack<int> s;
+  concur::intrusive_stack<int>::node n1{111111};
+  concur::intrusive_stack<int>::node n2{222222};
+  concur::intrusive_stack<int>::node n3{333333};
+  s.push(&n1);
+  s.push(&n2);
+  s.push(&n3);
+  EXPECT_TRUE(s.pop() == &n3);
+  EXPECT_TRUE(s.pop() == &n2);
+  EXPECT_TRUE(s.pop() == &n1);
+  EXPECT_TRUE(s.empty());
+  EXPECT_TRUE(s.top_.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_TRUE(n3.next.load(std::memory_order_relaxed) == &n2);
+  EXPECT_TRUE(n2.next.load(std::memory_order_relaxed) == &n1);
+  EXPECT_TRUE(n1.next.load(std::memory_order_relaxed) == nullptr);
+  EXPECT_EQ(n1.value, 111111);
+  EXPECT_EQ(n2.value, 222222);
+  EXPECT_EQ(n3.value, 333333);
+}
diff --git a/test/imp/test_imp_byte.cpp b/test/imp/test_imp_byte.cpp
new file mode 100644
index 00000000..5ce48d1f
--- /dev/null
+++ b/test/imp/test_imp_byte.cpp
@@ -0,0 +1,71 @@
+
+#include "gtest/gtest.h"
+
+#include "libimp/byte.h"
+#include "libimp/span.h"
+#include "libimp/fmt.h"
+#include "libimp/detect_plat.h"
+
+TEST(byte, construct) {
+  {
+    LIBIMP_UNUSED imp::byte b;
+    SUCCEED();
+  }
+  {
+    imp::byte b{};
+    EXPECT_EQ(int(b), 0);
+  }
+  {
+    imp::byte b{123};
+    EXPECT_EQ(int(b), 123);
+  }
+  {
+    imp::byte b{65535};
+    EXPECT_EQ(int(b), 255);
+    EXPECT_EQ(std::int8_t(b), -1);
+  }
+  {
+    imp::byte b{65536};
+    EXPECT_EQ(int(b), 0);
+  }
+}
+
+TEST(byte, compare) {
+  {
+    imp::byte b1{}, b2{};
+    EXPECT_EQ(b1, b2);
+  }
+  {
+    imp::byte b1{}, b2(321);
+    EXPECT_NE(b1, b2);
+  }
+}
+
+TEST(byte, fmt) {
+  {
+    imp::byte b1{}, b2(31);
+    EXPECT_EQ(imp::fmt(b1), "00");
+    EXPECT_EQ(imp::fmt(b2), "1f");
+    EXPECT_EQ(imp::fmt(imp::spec("03X")(b2)), "01F");
+  }
+  {
+    imp::byte bs[] {31, 32, 33, 34, 35, 36, 37, 38};
+    EXPECT_EQ(imp::fmt(imp::make_span(bs)), "1f 20 21 22 23 24 25 26");
+  }
+}
+
+TEST(byte, byte_cast) {
+  int a = 654321;
+  int *pa = &a;
+
+  // int * => byte *
+  imp::byte *pb = imp::byte_cast(pa);
+  EXPECT_EQ((std::size_t)pb, (std::size_t)pa);
+
+  // byte * => int32_t *
+  std::int32_t *pc = imp::byte_cast<std::int32_t>(pb);
+  EXPECT_EQ(*pc, a);
+
+  // byte alignment check
+  EXPECT_EQ(imp::byte_cast<int>(pb + 1), nullptr);
+}
\ No newline at end of file
diff --git a/test/imp/test_imp_codecvt.cpp b/test/imp/test_imp_codecvt.cpp
new file mode 100644
index 00000000..b7e887e5
--- /dev/null
+++ b/test/imp/test_imp_codecvt.cpp
@@ -0,0 +1,40 @@
+
+#include <string>
+#include <cstring>
+
+#include "gtest/gtest.h"
+
+#include "libimp/codecvt.h"
+
+TEST(codecvt, cvt_cstr) {
+  char const utf8[] = "hello world, 你好，こんにちは";
+  wchar_t const utf16[] = L"hello world, 你好，こんにちは";
+  {
+    auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (wchar_t *)nullptr, 0);
+    EXPECT_NE(cvt_len, 0);
+    std::wstring wstr(cvt_len, L'\0');
+    EXPECT_EQ(imp::cvt_cstr(utf8, std::strlen(utf8), &wstr[0], wstr.size()), cvt_len);
+    EXPECT_EQ(wstr, utf16);
+  }
+  {
+    auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (char *)nullptr, 0);
+    EXPECT_NE(cvt_len, 0);
+    std::string str(cvt_len, '\0');
+    EXPECT_EQ(imp::cvt_cstr(utf16, std::wcslen(utf16), &str[0], str.size()), cvt_len);
+    EXPECT_EQ(str, utf8);
+  }
+  {
+    auto cvt_len = imp::cvt_cstr(utf8, std::strlen(utf8), (char *)nullptr, 0);
+    EXPECT_EQ(cvt_len, std::strlen(utf8));
+    std::string str(cvt_len, '\0');
+    EXPECT_EQ(imp::cvt_cstr(utf8, cvt_len, &str[0], str.size()), cvt_len);
+    EXPECT_EQ(str, utf8);
+  }
+  {
+    auto cvt_len = imp::cvt_cstr(utf16, std::wcslen(utf16), (wchar_t *)nullptr, 0);
+    EXPECT_EQ(cvt_len, std::wcslen(utf16));
+    std::wstring wstr(cvt_len, u'\0');
+    EXPECT_EQ(imp::cvt_cstr(utf16, cvt_len, &wstr[0], wstr.size()), cvt_len);
+    EXPECT_EQ(wstr, utf16);
+  }
+}
\ No newline at end of file
diff --git a/test/imp/test_imp_detect_plat.cpp b/test/imp/test_imp_detect_plat.cpp
new file mode 100644
index 00000000..0870cc45
--- /dev/null
+++ b/test/imp/test_imp_detect_plat.cpp
@@ -0,0 +1,97 @@
+
+#include <iostream>
+#include <cstdint>
+
+#include "gtest/gtest.h"
+
+#include "libimp/detect_plat.h"
+
+namespace {
+
+} // namespace
+
+TEST(detect_plat, os) {
+#if defined(LIBIMP_OS_WINCE)
+  std::cout << "LIBIMP_OS_WINCE\n";
+#elif defined(LIBIMP_OS_WIN)
+  std::cout << "LIBIMP_OS_WIN\n";
+#elif defined(LIBIMP_OS_LINUX)
+  std::cout << "LIBIMP_OS_LINUX\n";
+#elif defined(LIBIMP_OS_QNX)
+  std::cout << "LIBIMP_OS_QNX\n";
+#elif defined(LIBIMP_OS_ANDROID)
+  std::cout << "LIBIMP_OS_ANDROID\n";
+#else
+  ASSERT_TRUE(false);
+#endif
+  SUCCEED();
+}
+
+TEST(detect_plat, cc) {
+#if defined(LIBIMP_CC_MSVC)
+  std::cout << "LIBIMP_CC_MSVC\n";
+#elif defined(LIBIMP_CC_GNUC)
+  std::cout << "LIBIMP_CC_GNUC\n";
+#else
+  ASSERT_TRUE(false);
+#endif
+  SUCCEED();
+}
+
+TEST(detect_plat, cpp) {
+#if defined(LIBIMP_CPP_20)
+  std::cout << "LIBIMP_CPP_20\n";
+#elif defined(LIBIMP_CPP_17)
+  std::cout << "LIBIMP_CPP_17\n";
+#elif defined(LIBIMP_CPP_14)
+  std::cout << "LIBIMP_CPP_14\n";
+#else
+  ASSERT_TRUE(false);
+#endif
+  SUCCEED();
+}
+
+TEST(detect_plat, byte_order) {
+  auto is_endian_little = [] {
+    union {
+      std::int32_t a;
+      std::int8_t  b;
+    } c;
+    c.a = 1;
+    return c.b == 1;
+  };
+  EXPECT_EQ(!!LIBIMP_ENDIAN_LIT, is_endian_little());
+  EXPECT_NE(!!LIBIMP_ENDIAN_BIG, is_endian_little());
+}
+
+TEST(detect_plat, fallthrough) {
+  switch (0) {
+  case 0:
+    std::cout << "fallthrough 0\n";
+    LIBIMP_FALLTHROUGH;
+  case 1:
+    std::cout << "fallthrough 1\n";
+    LIBIMP_FALLTHROUGH;
+  default:
+    std::cout << "fallthrough default\n";
+    break;
+  }
+  SUCCEED();
+}
+
+TEST(detect_plat, unused) {
+  LIBIMP_UNUSED int abc;
+  SUCCEED();
+}
+
+TEST(detect_plat, likely_unlikely) {
+  int xx = sizeof(int);
+  if LIBIMP_LIKELY(xx < sizeof(long long)) {
+    std::cout << "sizeof(int) < sizeof(long long)\n";
+  } else if LIBIMP_UNLIKELY(xx < sizeof(char)) {
+    std::cout << "sizeof(int) < sizeof(char)\n";
+  } else {
+    std::cout << "sizeof(int) < whatever\n";
+  }
+  SUCCEED();
+}
\ No newline at end of file
diff --git a/test/imp/test_imp_error.cpp b/test/imp/test_imp_error.cpp
new file mode 100644
index 00000000..8f0e31c7
--- /dev/null
+++ b/test/imp/test_imp_error.cpp
@@ -0,0 +1,14 @@
+#include <iostream>
+
+#include "gtest/gtest.h"
+
+#include "libimp/error.h"
+#include "libimp/result.h"
+#include "libimp/fmt.h"
+#include "libimp/codecvt.h"
+
+TEST(error, error_code) {
+  std::error_code ecode;
+  EXPECT_FALSE(ecode);
+  std::cout << imp::fmt(ecode, '\n');
+}
diff --git a/test/imp/test_imp_expected.cpp b/test/imp/test_imp_expected.cpp
new file mode 100644
index 00000000..21f64402
--- /dev/null
+++ b/test/imp/test_imp_expected.cpp
@@ -0,0 +1,146 @@
+
+#include <utility>
+#include <cstdio>
+#include <cstdint>
+
+#include "gtest/gtest.h"
+
+#include "libimp/expected.h"
+
+namespace {
+
+class test_val {
+public:
+  int val = 0;
+  int dc_ = 0;
+  int cc_ = 0;
+  int mv_ = 0;
+
+  test_val() {
+    dc_ += 1;
+    std::printf("test_val construct.\n");
+  }
+  test_val(test_val const &o)
+    : val(o.val) {
+    cc_ = o.cc_ + 1;
+    std::printf("test_val copy construct.\n");
+  }
+  test_val(test_val &&o) noexcept
+    : val(std::exchange(o.val, 0)) {
+    mv_ = o.mv_ + 1;
+    std::printf("test_val move construct.\n");
+  }
+  ~test_val() {
+    std::printf("test_val destruct.\n");
+  }
+
+  test_val &operator=(test_val &&o) noexcept {
+    mv_ = o.mv_ + 1;
+    val = std::exchange(o.val, 0);
+    return *this;
+  }
+
+  test_val(int v)
+    : val(v) {
+    std::printf("test_val value initialization.\n");
+  }
+
+  bool operator==(test_val const &rhs) const {
+    return val == rhs.val;
+  }
+};
+
+class test_err {
+public:
+  int dc_ = 0;
+  int cc_ = 0;
+  int mv_ = 0;
+  std::int64_t val = 0;
+
+  test_err() {
+    dc_ += 1;
+    std::printf("test_err construct.\n");
+  }
+  test_err(test_err const &o)
+    : val(o.val) {
+    cc_ = o.cc_ + 1;
+    std::printf("test_err copy construct.\n");
+  }
+  test_err(test_err &&o) noexcept
+    : val(std::exchange(o.val, 0)) {
+    mv_ = o.mv_ + 1;
+    std::printf("test_err move construct.\n");
+  }
+  ~test_err() {
+    std::printf("test_err destruct.\n");
+  }
+
+  test_err &operator=(test_err &&o) noexcept {
+    mv_ = o.mv_ + 1;
+    val = std::exchange(o.val, 0);
+    return *this;
+  }
+
+  test_err(int v)
+    : val(v) {
+    std::printf("test_err value initialization.\n");
+  }
+
+  bool operator==(test_err const &rhs) const {
+    return val == rhs.val;
+  }
+};
+
+} // namespace
+
+TEST(expected, in_place) {
+  imp::expected<test_val, test_err> e1;
+  EXPECT_TRUE(e1);
+  EXPECT_EQ(e1.value().dc_, 1);
+  EXPECT_EQ(e1.value().val, 0);
+
+  imp::expected<test_val, test_err> e2 {imp::in_place, 123};
+  EXPECT_TRUE(e2);
+  EXPECT_EQ(e2.value().dc_, 0);
+  EXPECT_EQ(e2.value().val, 123);
+}
+
+TEST(expected, unexpected) {
+  imp::expected<test_val, test_err> e1 {imp::unexpected};
+  EXPECT_FALSE(e1);
+  EXPECT_EQ(e1.error().dc_, 1);
+  EXPECT_EQ(e1.error().val, 0);
+
+  imp::expected<test_val, test_err> e2 {imp::unexpected, 321};
+  EXPECT_FALSE(e2);
+  EXPECT_EQ(e2.error().dc_, 0);
+  EXPECT_EQ(e2.error().val, 321);
+}
+
+TEST(expected, copy_and_move) {
+  imp::expected<test_val, test_err> e1 {imp::in_place, 123};
+  imp::expected<test_val, test_err> e2 {e1};
+  EXPECT_TRUE(e1);
+  EXPECT_TRUE(e2);
+  EXPECT_EQ(e1, e2);
+  EXPECT_EQ(e2.value().cc_, 1);
+  EXPECT_EQ(e2.value().val, 123);
+
+  imp::expected<test_val, test_err> e3 {imp::unexpected, 333};
+  imp::expected<test_val, test_err> e4 {e3};
+  EXPECT_FALSE(e3);
+  EXPECT_FALSE(e4);
+  EXPECT_EQ(e3, e4);
+  EXPECT_EQ(e4.error().cc_, 1);
+  EXPECT_EQ(e4.error().val, 333);
+
+  imp::expected<test_val, test_err> e5;
+  e5 = e1;
+  EXPECT_EQ(e1, e5);
+  EXPECT_EQ(e5.value().val, 123);
+
+  imp::expected<test_val, test_err> e6;
+  e6 = std::move(e5);
+  EXPECT_EQ(e1, e6);
+  EXPECT_EQ(e5.value().val, 0);
+}
\ No newline at end of file
diff --git a/test/imp/test_imp_fmt.cpp b/test/imp/test_imp_fmt.cpp
new file mode 100644
index 00000000..4f1634cf
--- /dev/null
+++ b/test/imp/test_imp_fmt.cpp
@@ -0,0 +1,125 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include <iostream>
+#include <tuple>
+#include <cstring>
+
+#include "gtest/gtest.h"
+
+#include "libimp/fmt.h"
+
+TEST(fmt, spec) {
+  EXPECT_STREQ(imp::spec("hello")(123).fstr.data(), "hello");
+  EXPECT_EQ(imp::spec("hello")(123).param , 123);
+  EXPECT_STREQ(imp::spec("hello")("world").fstr.data(), "hello");
+  EXPECT_STREQ(imp::spec("hello")("world").param , "world");
+}
+
+TEST(fmt, to_string) {
+  std::string joined;
+  imp::fmt_context ctx(joined);
+
+  auto check = [&](auto &&txt, auto &&...val) {
+    ctx.reset();
+    EXPECT_TRUE(imp::to_string(ctx, std::forward<decltype(val)>(val)...));
+    ctx.finish();
+    EXPECT_EQ(joined, std::forward<decltype(txt)>(txt));
+  };
+
+  /// \brief string
+  check("", "");
+  check("%what%", "%what%");
+  check("    %what%", "%what%", "10");
+  check("%what%    ", "%what%", "-10");
+
+  /// \brief character
+  check("A", 'A');
+  check("A", L'A');
+  check("A", u'A');
+  check("A", U'A');
+
+  /// \brief numeric
+  check("123"       , (signed char)123      );
+  check("-65"       , (signed char)-321     );
+  check("123"       , (unsigned char)123    );
+  check("65"        , (unsigned char)321    );
+  check("123"       , (short)123            );
+  check("-321"      , (short)-321           );
+  check("123"       , (unsigned short)123   );
+  check("321"       , (unsigned short)321   );
+  check("-7949"     , (short)123123         );
+  check("6359"      , (short)-321321        );
+  check("57587"     , (unsigned short)123123);
+  check("59177"     , (unsigned short)321321);
+  check("123123"    , 123123                );
+  check("-321321"   , -321321               );
+  check("123123"    , 123123u               );
+  check("321321"    , 321321u               );
+  check("123123"    , 123123ll              );
+  check("-321321"   , -321321ll             );
+  check("123123"    , 123123ull             );
+  check("321321"    , 321321ull             );
+  check("1e0f3"     , 123123, "x"           );
+  check("1e0f3"     , 123123u, "x"          );
+  check("1CAAB5C3B3", 123123123123ll, "X"   );
+  check("1CAAB5C3B3", 123123123123ull, "X"  );
+
+  /// \brief floating point
+  check("123.123"     , 123.123f, ".3");
+  check("0123.12300"  , 123.123, "010.5");
+  check("123.123000"  , 123.123l, "010.6");
+  check("1.500000e+00", 1.5, "e");
+  check("1.500000E+00", 1.5, "E");
+  double r = 0.0;
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 0.0/r)); ctx.finish();
+  std::cout << joined << "\n";
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, 1.0/r)); ctx.finish();
+  std::cout << joined << "\n";
+
+  /// \brief pointer
+  check("null", nullptr);
+  int *p = (int *)0x0f013a04;
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, (void *)p)); ctx.finish();
+  std::cout << joined << "\n";
+
+  /// \brief date and time
+  auto tp = std::chrono::system_clock::now();
+  auto tt = std::chrono::system_clock::to_time_t(tp);
+  auto tm = *std::localtime(&tt);
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, tm)); ctx.finish();
+  std::cout << joined << "\n";
+  std::string tm_str = joined;
+  ctx.reset(); EXPECT_TRUE(imp::to_string(ctx, tp)); ctx.finish();
+  EXPECT_EQ(tm_str, joined);
+}
+
+TEST(fmt, fmt) {
+  char const txt[] = "hello world.";
+
+  /// \brief hello world
+  auto s = imp::fmt("hello", " ", "world", ".");
+  EXPECT_EQ(s, txt);
+
+  /// \brief chrono
+  std::cout << imp::fmt('[', std::chrono::system_clock::now(), "] ", s) << "\n";
+
+  /// \brief long string
+  s = imp::fmt(imp::spec("4096")(txt));
+  std::string test(4096, ' ');
+  std::memcpy(&test[test.size() - sizeof(txt) + 1], txt, sizeof(txt) - 1);
+  EXPECT_EQ(s, test);
+}
+
+namespace {
+
+class foo {};
+
+bool tag_invoke(decltype(imp::fmt_to), imp::fmt_context &, foo arg) noexcept(false) {
+  throw arg;
+  return {};
+}
+
+} // namespace
+
+TEST(fmt, throw) {
+  EXPECT_THROW(std::ignore = imp::fmt(foo{}), foo);
+}
\ No newline at end of file
diff --git a/test/imp/test_imp_log.cpp b/test/imp/test_imp_log.cpp
new file mode 100644
index 00000000..1d5bd9b6
--- /dev/null
+++ b/test/imp/test_imp_log.cpp
@@ -0,0 +1,46 @@
+
+#include <iostream>
+#include <string>
+
+#include "gtest/gtest.h"
+
+#include "libimp/log.h"
+
+TEST(log, logger) {
+  {
+    LIBIMP_LOG_();
+    log.info("hello");
+  }
+  {
+    LIBIMP_LOG_();
+    log.info("hello 2");
+  }
+  {
+    LIBIMP_LOG_();
+    log.info("hello ", 3);
+  }
+  SUCCEED();
+}
+
+TEST(log, custom) {
+  struct log {
+    std::string i;
+    std::string e;
+  } ll_data;
+  auto ll = [&ll_data](auto &&ctx) {
+    auto s = imp::fmt(ctx.params);
+    if (ctx.level == imp::log::level::error) ll_data.e += s + " ";
+    else
+    if (ctx.level == imp::log::level::info ) ll_data.i += s + " ";
+  };
+
+  LIBIMP_LOG_(ll);
+
+  log.info ("hello", " world");
+  log.error("failed", ":");
+  log.info ("log", '-', "pt");
+  log.error("whatever");
+
+  EXPECT_EQ(ll_data.i, "hello world log-pt ");
+  EXPECT_EQ(ll_data.e, "failed: whatever ");
+}
diff --git a/test/imp/test_imp_result.cpp b/test/imp/test_imp_result.cpp
new file mode 100644
index 00000000..3d8ba076
--- /dev/null
+++ b/test/imp/test_imp_result.cpp
@@ -0,0 +1,122 @@
+
+#include <sstream>
+#include <cstdint>
+
+#include "gtest/gtest.h"
+
+#include "libimp/result.h"
+#include "libimp/fmt.h"
+
+TEST(result, ok) {
+  imp::result_code ret;
+  EXPECT_FALSE(ret);
+  EXPECT_FALSE(ret.ok());
+  EXPECT_EQ(ret.value(), 0);
+
+  ret = {0, true};
+  EXPECT_TRUE(ret);
+  EXPECT_TRUE(ret.ok());
+  EXPECT_EQ(ret.value(), 0);
+
+  ret = {0, false};
+  EXPECT_FALSE(ret);
+  EXPECT_FALSE(ret.ok());
+  EXPECT_EQ(ret.value(), 0);
+
+  ret = {0};
+  EXPECT_TRUE(ret);
+  EXPECT_TRUE(ret.ok());
+  EXPECT_EQ(ret.value(), 0);
+
+  ret = {1234, false};
+  EXPECT_FALSE(ret);
+  EXPECT_FALSE(ret.ok());
+  EXPECT_EQ(*ret, 1234);
+
+  ret = imp::result_code(1234, true);
+  EXPECT_TRUE(ret);
+  EXPECT_TRUE(ret.ok());
+  EXPECT_EQ(ret.value(), 1234);
+
+  ret = {0, false};
+  EXPECT_FALSE(ret);
+  EXPECT_FALSE(ret.ok());
+  EXPECT_EQ(ret.value(), 0);
+
+  ret = {4321, true};
+  EXPECT_TRUE(ret);
+  EXPECT_TRUE(ret.ok());
+  EXPECT_EQ(ret.value(), 4321);
+
+  imp::result<void> r1;
+  EXPECT_FALSE(r1);
+  r1 = std::error_code{};
+  EXPECT_TRUE(r1);
+  r1 = {};
+  EXPECT_FALSE(r1);
+  r1 = std::error_code{9999, std::generic_category()};
+  EXPECT_FALSE(r1);
+  EXPECT_EQ(r1.error().value(), 9999);
+
+  imp::result<int *> r2 {nullptr, std::error_code{4321, std::generic_category()}};
+  EXPECT_NE(r2, nullptr); // imp::result<int *>{nullptr}
+  EXPECT_EQ(*r2, nullptr);
+  EXPECT_FALSE(r2);
+}
+
+TEST(result, compare) {
+  imp::result_code r1, r2;
+  EXPECT_EQ(r1, r2);
+
+  imp::result_code r3(0, true);
+  EXPECT_NE(r1, r3);
+
+  imp::result_code r4(222222, true);
+  EXPECT_NE(r3, r4);
+
+  imp::result_code r5(222222, false);
+  EXPECT_NE(r4, r5);
+  r3 = r5;
+  EXPECT_EQ(r3, r5);
+}
+
+TEST(result, fmt) {
+  {
+    imp::result_code r1;
+    EXPECT_EQ(imp::fmt(r1), "fail, value = 0");
+    imp::result_code r2(65537, true);
+    EXPECT_EQ(imp::fmt(r2), "succ, value = 65537");
+    imp::result_code r3(0);
+    EXPECT_EQ(imp::fmt(r3), "succ, value = 0");
+  }
+  {
+    imp::result<int> r0;
+    EXPECT_EQ(imp::fmt(r0), imp::fmt(imp::result_code()));
+    imp::result<int> r1 {-123, false};
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("fail, value = ", -123));
+
+    imp::result<void *> r2 {&r1};
+    EXPECT_EQ(imp::fmt(r2), imp::fmt("succ, value = ", (void *)&r1));
+
+    int aaa {};
+    imp::result<int *> r3 {&aaa};
+    EXPECT_EQ(imp::fmt(r3), imp::fmt("succ, value = ", (void *)&aaa));
+    imp::result<int *> r4 {nullptr};
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = ", std::error_code(-1, std::generic_category())));
+    r4 = std::error_code(1234, std::generic_category());
+    EXPECT_EQ(imp::fmt(r4), imp::fmt("fail, value = ", nullptr, ", error = ", std::error_code(1234, std::generic_category())));
+    imp::result<int *> r5;
+    EXPECT_EQ(imp::fmt(r5), imp::fmt("fail, value = null, error = ", std::error_code(-1, std::generic_category())));
+  }
+  {
+    imp::result<std::int64_t> r1 {-123};
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("succ, value = ", -123));
+  }
+  {
+    imp::result<void> r1;
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("fail, error = ", std::error_code(-1, std::generic_category())));
+    r1 = std::error_code{};
+    EXPECT_TRUE(r1);
+    EXPECT_EQ(imp::fmt(r1), imp::fmt("succ, error = ", std::error_code()));
+  }
+}
diff --git a/test/imp/test_imp_span.cpp b/test/imp/test_imp_span.cpp
new file mode 100644
index 00000000..dd1f7170
--- /dev/null
+++ b/test/imp/test_imp_span.cpp
@@ -0,0 +1,75 @@
+
+#include <string>
+#include <memory>
+
+#include "gtest/gtest.h"
+
+#include "libimp/span.h"
+#include "libimp/countof.h"
+#include "libimp/byte.h"
+#include "libimp/fmt.h"
+
+TEST(span, to_address) {
+  int *a = new int;
+  EXPECT_EQ(imp::detail::to_address(a), a);
+  std::unique_ptr<int> b {a};
+  EXPECT_EQ(imp::detail::to_address(b), a);
+}
+
+TEST(span, span) {
+  auto test_proc = [](auto &&buf, auto &&sp) {
+    EXPECT_EQ(imp::countof(buf), sp.size());
+    EXPECT_EQ(sizeof(buf[0]) * imp::countof(buf), sp.size_bytes());
+    for (std::size_t i = 0; i < sp.size(); ++i) {
+      EXPECT_EQ(buf[i], sp[i]);
+    }
+  };
+  {
+    int buf[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+    auto sp = imp::make_span(buf);
+    test_proc(buf, sp);
+    test_proc(imp::make_span({0, 1, 2})   , sp.first(3));
+    test_proc(imp::make_span({6, 7, 8, 9}), sp.last(4));
+    test_proc(imp::make_span({3, 4, 5, 6}), sp.subspan(3, 4));
+    test_proc(imp::make_span({3, 4, 5, 6, 7, 8, 9}), sp.subspan(3));
+  }
+  {
+    std::vector<int> buf = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
+    auto sp = imp::make_span(buf);
+    imp::span<int> sp2 {buf.begin(), buf.end()};
+    EXPECT_EQ(sp, sp2);
+    test_proc(buf, sp);
+    test_proc(imp::make_span({0, 1, 2})   , sp.first(3));
+    test_proc(imp::make_span({6, 7, 8, 9}), sp.last(4));
+    test_proc(imp::make_span({3, 4, 5, 6}), sp.subspan(3, 4));
+    test_proc(imp::make_span({3, 4, 5, 6, 7, 8, 9}), sp.subspan(3));
+    test_proc(imp::make_span((imp::byte *)sp.data(), sp.size_bytes()), imp::as_bytes(sp));
+  }
+  {
+    std::string buf = "0123456789";
+    auto sp = imp::make_span(buf);
+    // if (sp == imp::make_span({nullptr})) {}
+    test_proc(buf, sp);
+    test_proc(imp::make_span("012", 3) , sp.first(3));
+    test_proc(imp::make_span("6789", 4), sp.last(4));
+    test_proc(imp::make_span("3456", 4), sp.subspan(3, 4));
+    test_proc(imp::make_span("3456789", 7), sp.subspan(3));
+  }
+}
+
+TEST(span, fmt) {
+  EXPECT_EQ(imp::fmt(imp::span<int>{}), "");
+  EXPECT_EQ(imp::fmt(imp::make_span({1, 3, 2, 4, 5, 6, 7})), "1 3 2 4 5 6 7");
+}
+
+TEST(span, construct) {
+  struct test_imp_span_construct {
+    /* data */
+    int  size() const noexcept { return sizeof(this); }
+    auto Data() const noexcept { return this; }
+  } d1;
+  imp::span<test_imp_span_construct const> sp {d1};
+  // imp::span<int const> spp {d1};
+  EXPECT_EQ(sp.size(), d1.size());
+  EXPECT_EQ(sp.data(), d1.Data());
+}
\ No newline at end of file
diff --git a/test/imp/test_imp_system.cpp b/test/imp/test_imp_system.cpp
new file mode 100644
index 00000000..6ac26297
--- /dev/null
+++ b/test/imp/test_imp_system.cpp
@@ -0,0 +1,16 @@
+
+#include <iostream>
+#include <string>
+
+#include "gtest/gtest.h"
+
+#include "libimp/system.h"
+#include "libimp/detect_plat.h"
+#include "libimp/codecvt.h"
+#include "libimp/fmt.h"
+
+TEST(system, conf) {
+  auto ret = imp::sys::conf(imp::sys::info::page_size);
+  EXPECT_TRUE(ret);
+  EXPECT_EQ(ret.value(), 4096);
+}
diff --git a/test/imp/test_imp_utility.cpp b/test/imp/test_imp_utility.cpp
new file mode 100644
index 00000000..037683d5
--- /dev/null
+++ b/test/imp/test_imp_utility.cpp
@@ -0,0 +1,177 @@
+
+#include <type_traits>  // std::aligned_storage_t
+#include <cstdint>
+#include <vector>
+
+#include "gtest/gtest.h"
+
+#include "libimp/uninitialized.h"
+#include "libimp/pimpl.h"
+#include "libimp/countof.h"
+#include "libimp/dataof.h"
+#include "libimp/horrible_cast.h"
+#include "libimp/detect_plat.h"
+#include "libimp/generic.h"
+
+TEST(utility, construct) {
+  struct Foo {
+    int a_;
+    short b_;
+    char c_;
+  };
+  std::aligned_storage_t<sizeof(Foo)> foo;
+  Foo *pfoo = imp::construct<Foo>(&foo, 123, short{321}, '1');
+  EXPECT_EQ(pfoo->a_, 123);
+  EXPECT_EQ(pfoo->b_, 321);
+  EXPECT_EQ(pfoo->c_, '1');
+  imp::destroy(pfoo);
+
+  static int bar_test_flag = 0;
+  struct Bar : Foo {
+    Bar(int a, short b, char c)
+        : Foo{a, b, c} {
+      ++bar_test_flag;
+    }
+    ~Bar() { --bar_test_flag; }
+  };
+  std::aligned_storage_t<sizeof(Bar)> bar;
+  Bar *pbar = imp::construct<Bar>(&bar, 123, short(321), '1');
+  EXPECT_EQ(pbar->a_, 123);
+  EXPECT_EQ(pbar->b_, 321);
+  EXPECT_EQ(pbar->c_, '1');
+  EXPECT_EQ(bar_test_flag, 1);
+  imp::destroy(pbar);
+  EXPECT_EQ(bar_test_flag, 0);
+
+  std::aligned_storage_t<sizeof(Bar)> bars[3];
+  for (auto &b : bars) {
+    auto pb = imp::construct<Bar>(&b, 321, short(123), '3');
+    EXPECT_EQ(pb->a_, 321);
+    EXPECT_EQ(pb->b_, 123);
+    EXPECT_EQ(pb->c_, '3');
+  }
+  //EXPECT_EQ(bar_test_flag, imp::countof(bars));
+  imp::destroy(reinterpret_cast<Bar(*)[3]>(&bars));
+  EXPECT_EQ(bar_test_flag, 0);
+}
+
+namespace {
+
+struct Foo : imp::pimpl::Obj<Foo> {
+  int *pi_;
+  Foo(int *pi) : pi_(pi) {}
+};
+
+struct Bar : imp::pimpl::Obj<Bar> {
+  int *pi_;
+  int *pj_;
+  Bar(int *pi, int *pj) : pi_(pi), pj_(pj) {}
+};
+
+} // namespace
+
+TEST(utility, pimpl_is_comfortable) {
+  EXPECT_TRUE ((imp::pimpl::is_comfortable<std::int32_t, std::int64_t>::value));
+  EXPECT_TRUE ((imp::pimpl::is_comfortable<std::int64_t, std::int64_t>::value));
+  EXPECT_FALSE((imp::pimpl::is_comfortable<std::int64_t, std::int32_t>::value));
+
+  EXPECT_TRUE ((imp::pimpl::is_comfortable<Foo>::value));
+  EXPECT_FALSE((imp::pimpl::is_comfortable<Bar>::value));
+}
+
+TEST(utility, pimpl_inherit) {
+  int i = 123;
+  Foo *pfoo = Foo::make(&i);
+  EXPECT_EQ(imp::pimpl::get(pfoo)->pi_, &i);
+  pfoo->clear();
+
+  int j = 321;
+  Bar *pbar = Bar::make(&i, &j);
+  EXPECT_EQ(imp::pimpl::get(pbar)->pi_, &i);
+  EXPECT_EQ(imp::pimpl::get(pbar)->pj_, &j);
+  pbar->clear();
+}
+
+TEST(utility, countof) {
+  struct {
+    constexpr int Size() const noexcept { return 3; }
+  } sv;
+  EXPECT_FALSE(imp::detail_countof::trait_has_size<decltype(sv)>::value);
+  EXPECT_TRUE (imp::detail_countof::trait_has_Size<decltype(sv)>::value);
+
+  std::vector<int> vec {1, 2, 3, 4, 5};
+  int arr[] {7, 6, 5, 4, 3, 2, 1};
+  auto il = {9, 7, 6, 4, 3, 1, 5};
+  EXPECT_EQ(imp::countof(sv) , sv.Size());
+  EXPECT_EQ(imp::countof(vec), vec.size());
+  EXPECT_EQ(imp::countof(arr), sizeof(arr) / sizeof(arr[0]));
+  EXPECT_EQ(imp::countof(il) , il.size());
+}
+
+TEST(utility, dataof) {
+  struct {
+    int *Data() const noexcept { return (int *)this; }
+  } sv;
+  EXPECT_FALSE(imp::detail_dataof::trait_has_data<decltype(sv)>::value);
+  EXPECT_TRUE (imp::detail_dataof::trait_has_Data<decltype(sv)>::value);
+
+  std::vector<int> vec {1, 2, 3, 4, 5};
+  int arr[] {7, 6, 5, 4, 3, 2, 1};
+  auto il = {9, 7, 6, 4, 3, 1, 5};
+  EXPECT_EQ(imp::dataof(sv) , sv.Data());
+  EXPECT_EQ(imp::dataof(vec), vec.data());
+  EXPECT_EQ(imp::dataof(arr), arr);
+  EXPECT_EQ(imp::dataof(il) , il.begin());
+}
+
+TEST(utility, horrible_cast) {
+  struct A {
+    int a_;
+  } a {123};
+
+  struct B {
+    char a_[sizeof(int)];
+  } b = imp::horrible_cast<B>(a);
+
+  EXPECT_EQ(b.a_[1], 0);
+  EXPECT_EQ(b.a_[2], 0);
+#if LIBIMP_ENDIAN_LIT
+  EXPECT_EQ(b.a_[0], 123);
+  EXPECT_EQ(b.a_[3], 0);
+#else
+  EXPECT_EQ(b.a_[3], 123);
+  EXPECT_EQ(b.a_[0], 0);
+#endif
+
+#if LIBIMP_ENDIAN_LIT
+  EXPECT_EQ(imp::horrible_cast<std::uint32_t>(0xff00'0000'0001ll), 1);
+#else
+  EXPECT_EQ(imp::horrible_cast<std::uint32_t>(0xff00'0000'0001ll), 0xff00);
+#endif
+}
+
+#if defined(LIBIMP_CPP_17)
+TEST(utility, in_place) {
+  EXPECT_TRUE((std::is_same<std::in_place_t, imp::in_place_t>::value));
+  [](imp::in_place_t) {}(std::in_place);
+  [](std::in_place_t) {}(imp::in_place);
+}
+#endif/*LIBIMP_CPP_17*/
+
+TEST(utility, copy_cvref) {
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int   , long>, long   >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int & , long>, long & >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int &&, long>, long &&>()));
+
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const   , long>, long const   >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const & , long>, long const & >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const &&, long>, long const &&>()));
+
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int volatile   , long>, long volatile   >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int volatile & , long>, long volatile & >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int volatile &&, long>, long volatile &&>()));
+
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const volatile   , long>, long const volatile   >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const volatile & , long>, long const volatile & >()));
+  EXPECT_TRUE((std::is_same<imp::copy_cvref_t<int const volatile &&, long>, long const volatile &&>()));
+}
\ No newline at end of file
diff --git a/test/ipc/test_ipc_event.cpp b/test/ipc/test_ipc_event.cpp
new file mode 100644
index 00000000..c4398e13
--- /dev/null
+++ b/test/ipc/test_ipc_event.cpp
@@ -0,0 +1,101 @@
+
+#include <thread>
+
+#include "gtest/gtest.h"
+
+#include <libipc/event.h>
+
+#if !defined(LIBIMP_OS_LINUX)
+TEST(event, open_close) {
+  auto evt = ipc::evt_open("test");
+  ASSERT_TRUE(evt);
+  ASSERT_EQ(ipc::evt_name(*evt), "test");
+  ASSERT_TRUE(ipc::evt_close(*evt));
+}
+
+TEST(event, wait_timeout) {
+  auto evt = ipc::evt_open("test");
+  ASSERT_TRUE(evt);
+  ASSERT_FALSE(*ipc::evt_wait(*evt, 0));
+  ASSERT_TRUE(ipc::evt_close(*evt));
+}
+
+TEST(event, set_wait) {
+  auto evt = ipc::evt_open("test");
+  ASSERT_TRUE(evt);
+  ASSERT_TRUE(ipc::evt_set(*evt));
+  ASSERT_TRUE(*ipc::evt_wait(*evt, 0));
+  ASSERT_TRUE(ipc::evt_close(*evt));
+}
+
+TEST(event, unicast) {
+  auto evt = ipc::evt_open("test");
+  ASSERT_TRUE(evt);
+  int success = 0;
+  auto wait = [evt, &success] {
+    if (*ipc::evt_wait(*evt, 200)) ++success;
+  };
+  auto th1 = std::thread(wait);
+  auto th2 = std::thread(wait);
+  auto th3 = std::thread(wait);
+  std::this_thread::sleep_for(std::chrono::milliseconds(100));
+  ASSERT_TRUE(ipc::evt_set(*evt));
+  th1.join();
+  th2.join();
+  th3.join();
+  ASSERT_TRUE(ipc::evt_close(*evt));
+  ASSERT_EQ(success, 1);
+}
+
+TEST(event, wait_multi_timeout) {
+  auto evt1 = ipc::evt_open("test1");
+  ASSERT_TRUE(evt1);
+  auto evt2 = ipc::evt_open("test2");
+  ASSERT_TRUE(evt2);
+  auto evt3 = ipc::evt_open("test3");
+  ASSERT_TRUE(evt3);
+  ASSERT_FALSE(*ipc::evt_wait(imp::make_span({*evt1, *evt2, *evt3}), 0));
+  ASSERT_TRUE(ipc::evt_close(*evt1));
+  ASSERT_TRUE(ipc::evt_close(*evt2));
+  ASSERT_TRUE(ipc::evt_close(*evt3));
+}
+
+TEST(event, set_wait_multi) {
+  auto evt1 = ipc::evt_open("test1");
+  ASSERT_TRUE(evt1);
+  auto evt2 = ipc::evt_open("test2");
+  ASSERT_TRUE(evt2);
+  auto evt3 = ipc::evt_open("test3");
+  ASSERT_TRUE(evt3);
+  ASSERT_TRUE(ipc::evt_set(*evt2));
+  ASSERT_TRUE(*ipc::evt_wait(imp::make_span({*evt1, *evt2, *evt3}), 0));
+  ASSERT_TRUE(ipc::evt_close(*evt1));
+  ASSERT_TRUE(ipc::evt_close(*evt2));
+  ASSERT_TRUE(ipc::evt_close(*evt3));
+}
+
+TEST(event, unicast_multi) {
+  auto evt1 = ipc::evt_open("test1");
+  ASSERT_TRUE(evt1);
+  auto evt2 = ipc::evt_open("test2");
+  ASSERT_TRUE(evt2);
+  auto evt3 = ipc::evt_open("test3");
+  ASSERT_TRUE(evt3);
+  int success = 0;
+  auto wait = [evt1, evt2, evt3, &success] {
+    if (*ipc::evt_wait(imp::make_span({*evt1, *evt2, *evt3}), 200)) ++success;
+  };
+  auto th1 = std::thread(wait);
+  auto th2 = std::thread(wait);
+  auto th3 = std::thread(wait);
+  std::this_thread::sleep_for(std::chrono::milliseconds(100));
+  ASSERT_TRUE(ipc::evt_set(*evt3));
+  th1.join();
+  th2.join();
+  th3.join();
+  ASSERT_TRUE(ipc::evt_close(*evt1));
+  ASSERT_TRUE(ipc::evt_close(*evt2));
+  ASSERT_TRUE(ipc::evt_close(*evt3));
+  ASSERT_EQ(success, 1);
+}
+#endif
diff --git a/test/ipc/test_ipc_shm.cpp b/test/ipc/test_ipc_shm.cpp
new file mode 100644
index 00000000..9a237d00
--- /dev/null
+++ b/test/ipc/test_ipc_shm.cpp
@@ -0,0 +1,195 @@
+
+#include "gtest/gtest.h"
+
+#include "libipc/shm.h"
+
+#include "test_util.h"
+
+TEST(shm, open_close) {
+  EXPECT_FALSE(ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::none));
+
+  auto shm1 = ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::create | ipc::mode::open);
+  EXPECT_TRUE(shm1);
+  EXPECT_FALSE(ipc::shm_open("hello-ipc-shm", 1024, ipc::mode::create));
+
+  auto pt1 = ipc::shm_get(*shm1);
+  EXPECT_TRUE(ipc::shm_size(*shm1) >= 1024);
+  EXPECT_NE(pt1, nullptr);
+  *(int *)pt1 = 0;
+
+  auto shm2 = ipc::shm_open(ipc::shm_name(*shm1), 0, ipc::mode::create | ipc::mode::open);
+  EXPECT_TRUE(shm2);
+  auto shm3 = ipc::shm_open(ipc::shm_name(*shm1), 128, ipc::mode::open);
+  EXPECT_TRUE(shm3);
+  auto shm4 = ipc::shm_open(ipc::shm_name(*shm1), 256, ipc::mode::create | ipc::mode::open);
+  EXPECT_TRUE(shm4);
+  EXPECT_EQ(ipc::shm_size(*shm1), ipc::shm_size(*shm2));
+  EXPECT_EQ(ipc::shm_size(*shm1), ipc::shm_size(*shm3));
+  EXPECT_EQ(ipc::shm_size(*shm1), ipc::shm_size(*shm4));
+  auto pt2 = ipc::shm_get(*shm1);
+  EXPECT_NE(pt2, nullptr);
+  EXPECT_EQ(*(int *)pt2, 0);
+  *(int *)pt1 = 1234;
+  EXPECT_EQ(*(int *)pt2, 1234);
+
+  EXPECT_TRUE(ipc::shm_close(*shm4));
+  EXPECT_TRUE(ipc::shm_close(*shm3));
+  EXPECT_TRUE(ipc::shm_close(*shm2));
+  EXPECT_TRUE(ipc::shm_close(*shm1));
+  EXPECT_FALSE(ipc::shm_close(nullptr));
+}
+
+TEST(shm, shared_memory) {
+  ipc::shared_memory shm;
+  EXPECT_FALSE(shm.valid());
+  EXPECT_EQ(shm.size(), 0);
+  EXPECT_EQ(shm.name(), "");
+  EXPECT_EQ(shm.get()    , nullptr);
+  EXPECT_EQ(*shm         , nullptr);
+  EXPECT_EQ(shm.as<int>(), nullptr);
+  shm.close();
+
+  EXPECT_TRUE(shm.open("hello-ipc-shared-memory", 2048, ipc::mode::create | ipc::mode::open));
+  EXPECT_TRUE(shm.valid());
+  EXPECT_TRUE(shm.size() >= 2048);
+  EXPECT_EQ(shm.name(), "hello-ipc-shared-memory");
+  EXPECT_NE(shm.get()    , nullptr);
+  EXPECT_NE(*shm         , nullptr);
+  EXPECT_NE(shm.as<int>(), nullptr);
+  *shm.as<int>() = 4321;
+
+  auto shm_r = ipc::shm_open(shm.name());
+  ASSERT_TRUE(shm_r);
+  EXPECT_EQ(*static_cast<int *>(ipc::shm_get(*shm_r)), 4321);
+
+  shm = ipc::shared_memory("hello-ipc-shared-memory-2", 512);
+  EXPECT_TRUE(shm.valid());
+  EXPECT_TRUE(shm.size() >= 512);
+  EXPECT_EQ(shm.name(), "hello-ipc-shared-memory-2");
+  EXPECT_NE(shm.get()    , nullptr);
+  EXPECT_NE(*shm         , nullptr);
+  EXPECT_NE(shm.as<int>(), nullptr);
+
+  *static_cast<int *>(ipc::shm_get(*shm_r)) = 1234;
+  *shm.as<int>() = 4444;
+  EXPECT_EQ(*static_cast<int *>(ipc::shm_get(*shm_r)), 1234);
+  EXPECT_EQ(*shm.as<int>(), 4444);
+
+  EXPECT_TRUE(ipc::shm_close(*shm_r));
+}
+
+TEST(shm, process) {
+  ipc::shared_memory shm{"ipc-shared-memory-process1", 333};
+  ASSERT_TRUE(shm.valid());
+  *shm.as<int>() = 4321;
+
+  auto r1 = test::subproc([] {
+    ipc::shared_memory shm{"ipc-shared-memory-process1"};
+    ASSERT_TRUE(shm.valid());
+    EXPECT_EQ(*shm.as<int>(), 4321);
+    *shm.as<int>() = 1234;
+  });
+
+  test::join_subproc(r1);
+  EXPECT_EQ(*shm.as<int>(), 1234);
+}
+
+#include <libimp/detect_plat.h>
+#if /*defined(LIBIMP_OS_LINUX)*/ 0
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <netinet/in.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+TEST(shm, pipe) {
+  auto writer = test::subproc([] {
+    mkfifo("/tmp/shm-pipe.w", S_IFIFO|0666);
+    // mkfifo("/tmp/shm-pipe.r", S_IFIFO|0666);
+    int wfd = open("/tmp/shm-pipe.w", O_WRONLY);
+    // int rfd = open("/tmp/shm-pipe.r", O_RDONLY);
+    printf("writer prepared...\n");
+    for (char c = 'A'; c <= 'Z'; ++c) {
+      sleep(1);
+      printf("\nwrite %c\n", c);
+      write(wfd, &c, sizeof(c));
+      // char n {};
+      // read(rfd, &n, sizeof(n));
+      // printf("write echo %c\n", n);
+    }
+    close(wfd);
+    // close(rfd);
+  });
+
+  auto reader_maker = [](int k) {
+    return [k] {
+      printf("r%d prepared...\n", k);
+      sleep(1);
+      int wfd = open("/tmp/shm-pipe.w", O_RDONLY);
+      // int rfd = open("/tmp/shm-pipe.r", O_WRONLY);
+      for (;;) {
+        char n {};
+        read(wfd, &n, sizeof(n));
+        printf("r%d %c\n", k, n);
+        // write(rfd, &n, sizeof(n));
+        if (n == 'Z') break;
+      }
+      close(wfd);
+      // close(rfd);
+    };
+  };
+
+  auto r1 = test::subproc(reader_maker(1));
+  auto r2 = test::subproc(reader_maker(2));
+
+  test::join_subproc(writer);
+  test::join_subproc(r1);
+  test::join_subproc(r2);
+}
+
+#include <sys/inotify.h>
+#include <stdio.h>
+
+TEST(shm, event) {
+  fclose(fopen("/tmp/shm-event", "w"));
+
+  auto sender = test::subproc([] {
+    printf("sender prepared...\n");
+    auto fd = fopen("/tmp/shm-event", "w");
+    for (int i = 0; i < 10; ++i) {
+      sleep(1);
+      printf("\nwrite %d\n", i);
+      char c {'A'};
+      fwrite(&c, 1, 1, fd);
+      fflush(fd);
+    }
+    fclose(fd);
+  });
+
+  auto reader_maker = [](int k) {
+    return [k] {
+      printf("r%d prepared...\n", k);
+      sleep(1);
+      int ifd = inotify_init();
+      int iwd = inotify_add_watch(ifd, "/tmp/shm-event", IN_MODIFY);
+      for (int i = 0; i < 10; ++i) {
+        struct inotify_event e {};
+        read(ifd, &e, sizeof(e));
+        printf("r%d %u\n", k, e.mask);
+      }
+      inotify_rm_watch(ifd, iwd);
+      close(ifd);
+    };
+  };
+
+  auto r1 = test::subproc(reader_maker(1));
+  auto r2 = test::subproc(reader_maker(2));
+
+  test::join_subproc(sender);
+  test::join_subproc(r1);
+  test::join_subproc(r2);
+}
+#endif
\ No newline at end of file
diff --git a/test/pmr/test_pmr_allocator.cpp b/test/pmr/test_pmr_allocator.cpp
new file mode 100644
index 00000000..f55a2646
--- /dev/null
+++ b/test/pmr/test_pmr_allocator.cpp
@@ -0,0 +1,78 @@
+
+#include <vector>
+#include <utility>
+
+#include "gtest/gtest.h"
+
+#include "libpmr/allocator.h"
+
+TEST(pmr_allocator, construct) {
+  pmr::allocator alc;
+  SUCCEED();
+}
+
+TEST(pmr_allocator, construct_value_initialization) {
+  pmr::allocator alc{};
+  auto p = alc.allocate(128);
+  EXPECT_NE(p, nullptr);
+  EXPECT_NO_THROW(alc.deallocate(p, 128));
+}
+
+namespace {
+
+class dummy_resource {
+public:
+  void *allocate(std::size_t, std::size_t = 0) noexcept {
+    return nullptr;
+  }
+  void deallocate(void *, std::size_t, std::size_t = 0) noexcept {
+    return;
+  }
+};
+
+} // namespace
+
+TEST(pmr_allocator, construct_copy_move) {
+  pmr::new_delete_resource mem_res;
+  dummy_resource dummy_res;
+  pmr::allocator alc1{&mem_res}, alc2{&dummy_res};
+  auto p = alc1.allocate(128);
+  ASSERT_NE(p, nullptr);
+  ASSERT_NO_THROW(alc1.deallocate(p, 128));
+  ASSERT_EQ(alc2.allocate(128), nullptr);
+
+  pmr::allocator alc3{alc1}, alc4{alc2}, alc5{std::move(alc1)};
+
+  p = alc3.allocate(128);
+  ASSERT_NE(p, nullptr);
+  ASSERT_NO_THROW(alc3.deallocate(p, 128));
+
+  ASSERT_EQ(alc4.allocate(128), nullptr);
+
+  p = alc5.allocate(128);
+  ASSERT_NE(p, nullptr);
+  ASSERT_NO_THROW(alc5.deallocate(p, 128));
+}
+
+TEST(pmr_allocator, swap) {
+  pmr::new_delete_resource mem_res;
+  dummy_resource dummy_res;
+  pmr::allocator alc1{&mem_res}, alc2{&dummy_res};
+  alc1.swap(alc2);
+  auto p = alc2.allocate(128);
+  ASSERT_NE(p, nullptr);
+  ASSERT_NO_THROW(alc2.deallocate(p, 128));
+  ASSERT_EQ(alc1.allocate(128), nullptr);
+}
+
+TEST(pmr_allocator, invalid_alloc_free) {
+  pmr::allocator alc1;
+  EXPECT_EQ(alc1.allocate(0), nullptr);
+  EXPECT_NO_THROW(alc1.deallocate(nullptr, 128));
+  EXPECT_NO_THROW(alc1.deallocate(nullptr, 0));
+  EXPECT_NO_THROW(alc1.deallocate(&alc1, 0));
+}
+
+TEST(pmr_allocator, sizeof) {
+  EXPECT_EQ(sizeof(pmr::allocator), sizeof(void *) * 2);
+}
diff --git a/test/pmr/test_pmr_block_pool.cpp b/test/pmr/test_pmr_block_pool.cpp
new file mode 100644
index 00000000..f98f89fd
--- /dev/null
+++ b/test/pmr/test_pmr_block_pool.cpp
@@ -0,0 +1,89 @@
+
+#include <type_traits>
+#include <algorithm>
+
+#include "gtest/gtest.h"
+
+#include "libpmr/block_pool.h"
+
+TEST(pmr_block_pool, central_cache_allocator) {
+  auto &a = pmr::central_cache_allocator();
+  ASSERT_FALSE(nullptr == a.allocate(1));
+  ASSERT_FALSE(nullptr == a.allocate(10));
+  ASSERT_FALSE(nullptr == a.allocate(100));
+  ASSERT_FALSE(nullptr == a.allocate(1000));
+  ASSERT_FALSE(nullptr == a.allocate(10000));
+}
+
+TEST(pmr_block_pool, block) {
+  pmr::block<1> b1;
+  EXPECT_EQ(sizeof(b1), (std::max)(alignof(std::max_align_t), sizeof(void *)));
+  pmr::block<sizeof(void *)> b2;
+  EXPECT_EQ(sizeof(b2), (std::max)(alignof(std::max_align_t), sizeof(void *)));
+  pmr::block<sizeof(void *) + 1> b3;
+  EXPECT_EQ(sizeof(b3), (std::max)(alignof(std::max_align_t), sizeof(void *) * 2));
+}
+
+TEST(pmr_block_pool, central_cache_pool_ctor) {
+  ASSERT_FALSE((std::is_default_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  ASSERT_FALSE((std::is_copy_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  ASSERT_FALSE((std::is_move_constructible<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  ASSERT_FALSE((std::is_copy_assignable<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  ASSERT_FALSE((std::is_move_assignable<pmr::central_cache_pool<pmr::block<1>, 1>>::value));
+  {
+    auto &pool = pmr::central_cache_pool<pmr::block<1>, 1>::instance();
+    pmr::block<1> *b1 = pool.aqueire();
+    ASSERT_FALSE(nullptr == b1);
+    ASSERT_TRUE (nullptr == b1->next);
+    pool.release(b1);
+    pmr::block<1> *b2 = pool.aqueire();
+    EXPECT_EQ(b1, b2);
+    pmr::block<1> *b3 = pool.aqueire();
+    ASSERT_FALSE(nullptr == b3);
+    ASSERT_TRUE (nullptr == b3->next);
+    EXPECT_NE(b1, b3);
+  }
+  {
+    auto &pool = pmr::central_cache_pool<pmr::block<1>, 2>::instance();
+    pmr::block<1> *b1 = pool.aqueire();
+    ASSERT_FALSE(nullptr == b1);
+    ASSERT_FALSE(nullptr == b1->next);
+    ASSERT_TRUE (nullptr == b1->next->next);
+    pool.release(b1);
+    pmr::block<1> *b2 = pool.aqueire();
+    EXPECT_EQ(b1, b2);
+    pmr::block<1> *b3 = pool.aqueire();
+    EXPECT_NE(b1, b3);
+    pmr::block<1> *b4 = pool.aqueire();
+    ASSERT_FALSE(nullptr == b4);
+    ASSERT_FALSE(nullptr == b4->next);
+    ASSERT_TRUE (nullptr == b4->next->next);
+    EXPECT_NE(b1, b4);
+  }
+}
+
+TEST(pmr_block_pool, ctor) {
+  ASSERT_TRUE ((std::is_default_constructible<pmr::block_pool<1, 1>>::value));
+  ASSERT_FALSE((std::is_copy_constructible<pmr::block_pool<1, 1>>::value));
+  ASSERT_TRUE ((std::is_move_constructible<pmr::block_pool<1, 1>>::value));
+  ASSERT_FALSE((std::is_copy_assignable<pmr::block_pool<1, 1>>::value));
+  ASSERT_FALSE((std::is_move_assignable<pmr::block_pool<1, 1>>::value));
+}
+
+TEST(pmr_block_pool, allocate) {
+  std::vector<void *> v;
+  pmr::block_pool<1, 1> pool;
+  for (int i = 0; i < 100; ++i) {
+    v.push_back(pool.allocate());
+  }
+  for (void *p: v) {
+    ASSERT_FALSE(nullptr == p);
+    pool.deallocate(p);
+  }
+  for (int i = 0; i < 100; ++i) {
+    ASSERT_EQ(v[v.size() - i - 1], pool.allocate());
+  }
+  for (void *p: v) {
+    pool.deallocate(p);
+  }
+}
diff --git a/test/pmr/test_pmr_memory_resource.cpp b/test/pmr/test_pmr_memory_resource.cpp
new file mode 100644
index 00000000..e322c320
--- /dev/null
+++ b/test/pmr/test_pmr_memory_resource.cpp
@@ -0,0 +1,63 @@
+
+#include <utility>
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
+#include <memory_resource>
+#endif
+
+#include "gtest/gtest.h"
+
+#include "libpmr/memory_resource.h"
+
+namespace {
+
+template <typename T>
+void *test_mr(T &&mr, std::size_t bytes, std::size_t alignment) {
+  auto p = std::forward<T>(mr).allocate(bytes, alignment);
+  if (alignment == 0) {
+    EXPECT_EQ(p, nullptr);
+  } else if (p != nullptr) {
+    EXPECT_EQ((std::size_t)p % alignment, 0);
+  }
+  std::forward<T>(mr).deallocate(p, bytes, alignment);
+  return p;
+}
+
+} // namespace
+
+TEST(pmr_memory_resource, traits) {
+  EXPECT_FALSE(pmr::has_allocate<void>::value);
+  EXPECT_FALSE(pmr::has_allocate<int>::value);
+  EXPECT_FALSE(pmr::has_allocate<std::vector<int>>::value);
+  EXPECT_FALSE(pmr::has_allocate<std::allocator<int>>::value);
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
+  EXPECT_TRUE (pmr::has_allocate<std::pmr::memory_resource>::value);
+  EXPECT_TRUE (pmr::has_allocate<std::pmr::polymorphic_allocator<int>>::value);
+#endif
+
+  EXPECT_FALSE(pmr::has_deallocate<void>::value);
+  EXPECT_FALSE(pmr::has_deallocate<int>::value);
+  EXPECT_FALSE(pmr::has_deallocate<std::vector<int>>::value);
+  EXPECT_FALSE(pmr::has_deallocate<std::allocator<int>>::value);
+#if defined(LIBIMP_CPP_17) && defined(__cpp_lib_memory_resource)
+  EXPECT_TRUE (pmr::has_deallocate<std::pmr::memory_resource>::value);
+  EXPECT_FALSE(pmr::has_deallocate<std::pmr::polymorphic_allocator<int>>::value);
+#endif
+}
+
+TEST(pmr_memory_resource, new_delete_resource) {
+  pmr::new_delete_resource mem_res;
+
+  EXPECT_EQ(test_mr(mem_res, 0, 0), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 1), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 2), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 3), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 8), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 0, 64), nullptr);
+
+  EXPECT_EQ(test_mr(mem_res, 1, 0), nullptr);
+  EXPECT_NE(test_mr(mem_res, 1, 1), nullptr);
+  EXPECT_NE(test_mr(mem_res, 1, 2), nullptr);
+  EXPECT_EQ(test_mr(mem_res, 1, 3), nullptr);
+  EXPECT_NE(test_mr(mem_res, 1, 8), nullptr);
+  EXPECT_NE(test_mr(mem_res, 1, 64), nullptr);
+}
\ No newline at end of file
diff --git a/test/pmr/test_pmr_monotonic_buffer_resource.cpp b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
new file mode 100644
index 00000000..67031212
--- /dev/null
+++ b/test/pmr/test_pmr_monotonic_buffer_resource.cpp
@@ -0,0 +1,133 @@
+
+#include <type_traits>
+#include <array>
+#include <cstdlib>
+
+#include "gtest/gtest.h"
+
+#include "libpmr/monotonic_buffer_resource.h"
+
+TEST(pmr_monotonic_buffer_resource, construct) {
+  { pmr::monotonic_buffer_resource tmp; }
+  pmr::monotonic_buffer_resource{};
+  pmr::monotonic_buffer_resource{pmr::allocator{}};
+  pmr::monotonic_buffer_resource{0};
+  pmr::monotonic_buffer_resource{0, pmr::allocator{}};
+  pmr::monotonic_buffer_resource{imp::span<imp::byte>{}};
+  pmr::monotonic_buffer_resource{imp::span<imp::byte>{}, pmr::allocator{}};
+  SUCCEED();
+}
+
+TEST(pmr_monotonic_buffer_resource, no_copy) {
+  EXPECT_FALSE(std::is_copy_constructible<pmr::monotonic_buffer_resource>::value);
+  EXPECT_FALSE(std::is_copy_assignable<pmr::monotonic_buffer_resource>::value);
+  EXPECT_FALSE(std::is_move_constructible<pmr::monotonic_buffer_resource>::value);
+  EXPECT_FALSE(std::is_move_assignable<pmr::monotonic_buffer_resource>::value);
+}
+
+TEST(pmr_monotonic_buffer_resource, upstream_resource) {
+  struct dummy_allocator {
+    bool allocated = false;
+    void *allocate(std::size_t, std::size_t) noexcept { allocated = true; return nullptr; }
+    void deallocate(void *, std::size_t, std::size_t) noexcept {}
+  } dummy;
+  pmr::monotonic_buffer_resource tmp{&dummy};
+  ASSERT_EQ(tmp.upstream_resource().allocate(1), nullptr);
+  ASSERT_TRUE(dummy.allocated);
+}
+
+namespace {
+
+struct dummy_allocator {
+  std::size_t allocated = 0;
+  void *allocate(std::size_t size, std::size_t) noexcept {
+    allocated += size;
+    return std::malloc(size);
+  }
+  void deallocate(void *p, std::size_t size, std::size_t) noexcept {
+    allocated -= size;
+    std::free(p);
+  }
+};
+
+} // namespace
+
+TEST(pmr_monotonic_buffer_resource, allocate) {
+  dummy_allocator dummy;
+  {
+    pmr::monotonic_buffer_resource tmp{&dummy};
+    ASSERT_EQ(tmp.allocate(0), nullptr);
+    ASSERT_EQ(dummy.allocated, 0);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+  {
+    pmr::monotonic_buffer_resource tmp{&dummy};
+    std::size_t sz = 0;
+    for (std::size_t i = 1; i < 1024; ++i) {
+      ASSERT_NE(tmp.allocate(i), nullptr);
+      sz += i;
+    }
+    for (std::size_t i = 1; i < 1024; ++i) {
+      ASSERT_NE(tmp.allocate(1024 - i), nullptr);
+      sz += 1024 - i;
+    }
+    ASSERT_GE(dummy.allocated, sz);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+}
+
+TEST(pmr_monotonic_buffer_resource, allocate_by_buffer) {
+  dummy_allocator dummy;
+  std::array<imp::byte, 4096> buffer;
+  {
+    pmr::monotonic_buffer_resource tmp{buffer, &dummy};
+    for (std::size_t i = 1; i < 64; ++i) {
+      ASSERT_NE(tmp.allocate(i), nullptr);
+    }
+    ASSERT_EQ(dummy.allocated, 0);
+    std::size_t sz = 0;
+    for (std::size_t i = 1; i < 64; ++i) {
+      ASSERT_NE(tmp.allocate(64 - i), nullptr);
+      sz += 64 - i;
+    }
+    ASSERT_GT(dummy.allocated, sz);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+}
+
+TEST(pmr_monotonic_buffer_resource, release) {
+  dummy_allocator dummy;
+  {
+    pmr::monotonic_buffer_resource tmp{&dummy};
+    tmp.release();
+    ASSERT_EQ(dummy.allocated, 0);
+    ASSERT_NE(tmp.allocate(1024), nullptr);
+    ASSERT_GE(dummy.allocated, 1024u);
+    ASSERT_LE(dummy.allocated, 1024u * 1.5);
+    tmp.release();
+    ASSERT_EQ(dummy.allocated, 0);
+    ASSERT_NE(tmp.allocate(1024), nullptr);
+    ASSERT_GE(dummy.allocated, 1024u);
+    ASSERT_LE(dummy.allocated, 1024u * 1.5);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+  std::array<imp::byte, 4096> buffer;
+  {
+    pmr::monotonic_buffer_resource tmp{buffer, &dummy};
+    auto *p = tmp.allocate(1024);
+    ASSERT_EQ(p, buffer.data());
+    ASSERT_EQ(dummy.allocated, 0);
+    p = tmp.allocate(10240);
+    ASSERT_NE(p, buffer.data());
+    ASSERT_LE(dummy.allocated, 10240u + 1024u);
+    tmp.release();
+    ASSERT_EQ(dummy.allocated, 0);
+    p = tmp.allocate(1024);
+    ASSERT_EQ(p, buffer.data());
+    ASSERT_EQ(dummy.allocated, 0);
+    p = tmp.allocate(10240);
+    ASSERT_NE(p, buffer.data());
+    ASSERT_LE(dummy.allocated, 10240u + 1024u);
+  }
+  ASSERT_EQ(dummy.allocated, 0);
+}
diff --git a/test/pmr/test_pmr_new.cpp b/test/pmr/test_pmr_new.cpp
new file mode 100644
index 00000000..e3b1c690
--- /dev/null
+++ b/test/pmr/test_pmr_new.cpp
@@ -0,0 +1,169 @@
+
+#include <limits>
+#include <array>
+#include <cstring>
+#include <cstddef>
+#include <thread>
+
+#include "gtest/gtest.h"
+
+#include "libpmr/new.h"
+
+TEST(pmr_new, regular_sizeof) {
+  ASSERT_EQ(pmr::regular_sizeof<std::int8_t >(), pmr::regular_head_size + alignof(std::max_align_t));
+  ASSERT_EQ(pmr::regular_sizeof<std::int16_t>(), pmr::regular_head_size + alignof(std::max_align_t));
+  ASSERT_EQ(pmr::regular_sizeof<std::int32_t>(), pmr::regular_head_size + alignof(std::max_align_t));
+  ASSERT_EQ(pmr::regular_sizeof<std::int64_t>(), pmr::regular_head_size + alignof(std::max_align_t));
+
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 10    >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 10   , alignof(std::max_align_t)));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 100   >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 100  , alignof(std::max_align_t)));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 1000  >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 1000 , 128));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 10000 >>()), ::LIBIMP::round_up<std::size_t>(pmr::regular_head_size + 10000, 8192));
+  ASSERT_EQ((pmr::regular_sizeof<std::array<char, 100000>>()), (std::numeric_limits<std::size_t>::max)());
+}
+
+TEST(pmr_new, $new) {
+  auto p = pmr::$new<int>();
+  ASSERT_NE(p, nullptr);
+  *p = -1;
+  ASSERT_EQ(*p, -1);
+  pmr::$delete(p);
+}
+
+TEST(pmr_new, $new_value) {
+  auto p = pmr::$new<int>((std::numeric_limits<int>::max)());
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(*p, (std::numeric_limits<int>::max)());
+  pmr::$delete(p);
+}
+
+namespace {
+
+template <std::size_t Pts, std::size_t N>
+void test_new$array() {
+  std::array<void *, Pts> pts;
+  using T = std::array<char, N>;
+  for (int i = 0; i < (int)pts.size(); ++i) {
+    auto p = pmr::$new<T>();
+    pts[i] = p;
+    std::memset(p, i, sizeof(T));
+  }
+  for (int i = 0; i < (int)pts.size(); ++i) {
+    T tmp;
+    std::memset(&tmp, i, sizeof(T));
+    ASSERT_EQ(std::memcmp(pts[i], &tmp, sizeof(T)), 0);
+    pmr::$delete(static_cast<T *>(pts[i]));
+  }
+}
+
+} // namespace
+
+TEST(pmr_new, $new_array) {
+  test_new$array<1000, 10>();
+  test_new$array<1000, 100>();
+  test_new$array<1000, 1000>();
+  test_new$array<1000, 10000>();
+  test_new$array<1000, 100000>();
+  // test_new$array<1000, 1000000>();
+}
+
+namespace {
+
+int construct_count__ = 0;
+
+class Base {
+public:
+  virtual ~Base() = default;
+  virtual int get() const = 0;
+};
+
+class Derived : public Base {
+public:
+  Derived(int value) : value_(value) {
+    construct_count__ = value_;
+  }
+
+  ~Derived() override {
+    construct_count__ = 0;
+  }
+
+  int get() const override { return value_; }
+
+private:
+  int value_;
+};
+
+class Derived64K : public Derived {
+public:
+  using Derived::Derived;
+
+private:
+  std::array<char, 65536> padding_;
+};
+
+} // namespace
+
+TEST(pmr_new, $delete_poly) {
+  Base *p = pmr::$new<Derived>(-1);
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(p->get(), -1);
+  ASSERT_EQ(construct_count__, -1);
+  pmr::$delete(p);
+  ASSERT_EQ(construct_count__, 0);
+
+  ASSERT_EQ(p, pmr::$new<Derived>((std::numeric_limits<int>::max)()));
+  ASSERT_EQ(p->get(), (std::numeric_limits<int>::max)());
+  ASSERT_EQ(construct_count__, (std::numeric_limits<int>::max)());
+  pmr::$delete(p);
+  ASSERT_EQ(construct_count__, 0);
+}
+
+TEST(pmr_new, $delete_poly64k) {
+  Base *p = pmr::$new<Derived64K>(-1);
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(p->get(), -1);
+  ASSERT_EQ(construct_count__, -1);
+  pmr::$delete(p);
+  ASSERT_EQ(construct_count__, 0);
+
+  Base *q = pmr::$new<Derived64K>((std::numeric_limits<int>::max)());
+  ASSERT_EQ(q->get(), (std::numeric_limits<int>::max)());
+  ASSERT_EQ(construct_count__, (std::numeric_limits<int>::max)());
+  pmr::$delete(q);
+  ASSERT_EQ(construct_count__, 0);
+}
+
+TEST(pmr_new, $delete_null) {
+  Base *p = nullptr;
+  pmr::$delete(p);
+  SUCCEED();
+}
+
+TEST(pmr_new, multi_thread) {
+  std::array<std::thread, 16> threads;
+  for (auto &t : threads) {
+    t = std::thread([] {
+      for (int i = 0; i < 10000; ++i) {
+        auto p = pmr::$new<int>();
+        *p = i;
+        pmr::$delete(p);
+      }
+      std::array<void *, 10000> pts;
+      for (int i = 0; i < 10000; ++i) {
+        auto p = pmr::$new<std::array<char, 10>>();
+        pts[i] = p;
+        std::memset(p, i, sizeof(std::array<char, 10>));
+      }
+      for (int i = 0; i < 10000; ++i) {
+        std::array<char, 10> tmp;
+        std::memset(&tmp, i, sizeof(std::array<char, 10>));
+        ASSERT_EQ(std::memcmp(pts[i], &tmp, sizeof(std::array<char, 10>)), 0);
+        pmr::$delete(static_cast<std::array<char, 10> *>(pts[i]));
+      }
+    });
+  }
+  for (auto &t : threads) {
+    t.join();
+  }
+  SUCCEED();
+}
diff --git a/test/pmr/test_pmr_small_storage.cpp b/test/pmr/test_pmr_small_storage.cpp
new file mode 100644
index 00000000..c2da3f9c
--- /dev/null
+++ b/test/pmr/test_pmr_small_storage.cpp
@@ -0,0 +1,172 @@
+
+#include <type_traits>
+#include <utility>
+
+#include "gtest/gtest.h"
+
+#include "libpmr/small_storage.h"
+
+TEST(pmr_small_storage, holder_construct) {
+  pmr::holder_null();
+  pmr::holder<int, true>();
+  pmr::holder<int, false>();
+  pmr::holder<void, true>();
+  pmr::holder<void, false>();
+  SUCCEED();
+}
+
+TEST(pmr_small_storage, holder_copy_move_construct) {
+  EXPECT_FALSE(std::is_copy_constructible<pmr::holder_null>::value);
+  EXPECT_FALSE((std::is_copy_constructible<pmr::holder<int, true>>::value));
+  EXPECT_FALSE((std::is_copy_constructible<pmr::holder<int, false>>::value));
+  EXPECT_FALSE((std::is_copy_constructible<pmr::holder<void, true>>::value));
+  EXPECT_FALSE((std::is_copy_constructible<pmr::holder<void, false>>::value));
+
+  EXPECT_FALSE(std::is_copy_assignable<pmr::holder_null>::value);
+  EXPECT_FALSE((std::is_copy_assignable<pmr::holder<int, true>>::value));
+  EXPECT_FALSE((std::is_copy_assignable<pmr::holder<int, false>>::value));
+  EXPECT_FALSE((std::is_copy_assignable<pmr::holder<void, true>>::value));
+  EXPECT_FALSE((std::is_copy_assignable<pmr::holder<void, false>>::value));
+
+  EXPECT_FALSE(std::is_move_constructible<pmr::holder_null>::value);
+  EXPECT_FALSE((std::is_move_constructible<pmr::holder<int, true>>::value));
+  EXPECT_FALSE((std::is_move_constructible<pmr::holder<int, false>>::value));
+  EXPECT_FALSE((std::is_move_constructible<pmr::holder<void, true>>::value));
+  EXPECT_FALSE((std::is_move_constructible<pmr::holder<void, false>>::value));
+
+  EXPECT_FALSE(std::is_move_assignable<pmr::holder_null>::value);
+  EXPECT_FALSE((std::is_move_assignable<pmr::holder<int, true>>::value));
+  EXPECT_FALSE((std::is_move_assignable<pmr::holder<int, false>>::value));
+  EXPECT_FALSE((std::is_move_assignable<pmr::holder<void, true>>::value));
+  EXPECT_FALSE((std::is_move_assignable<pmr::holder<void, false>>::value));
+}
+
+namespace {
+
+struct foo {
+  int i;
+  foo(int i) : i(i) {}
+  foo(foo const &rhs) : i(rhs.i) {}
+  foo(foo &&rhs) : i(std::exchange(rhs.i, 0)) {}
+};
+
+} // namespace
+
+TEST(pmr_small_storage, holder_copy_move_object_stack) {
+  pmr::allocator alc;
+  pmr::holder<foo, true> h1(alc, 1);
+  pmr::holder<foo, true> h2, h3;
+  h1.copy_to(alc, &h2);
+  EXPECT_EQ(static_cast<foo *>(h1.get())->i, 1);
+  EXPECT_EQ(static_cast<foo *>(h2.get())->i, 1);
+  h1.move_to(alc, &h3);
+  EXPECT_EQ(static_cast<foo *>(h1.get())->i, 0);
+  EXPECT_EQ(static_cast<foo *>(h3.get())->i, 1);
+  h1.destroy(alc);
+  h2.destroy(alc);
+  h3.destroy(alc);
+}
+
+TEST(pmr_small_storage, holder_copy_move_object_heap) {
+  pmr::allocator alc;
+  pmr::holder<foo, false> h4(alc, 1);
+  pmr::holder<foo, false> h5, h6;
+  h4.copy_to(alc, &h5);
+  EXPECT_EQ(static_cast<foo *>(h4.get())->i, 1);
+  EXPECT_EQ(static_cast<foo *>(h5.get())->i, 1);
+  h4.move_to(alc, &h6);
+  EXPECT_EQ(static_cast<foo *>(h4.get())->i, 0);
+  EXPECT_EQ(static_cast<foo *>(h6.get())->i, 1);
+  h4.destroy(alc);
+  h5.destroy(alc);
+  h6.destroy(alc);
+}
+
+TEST(pmr_small_storage, holder_copy_move_array_stack) {
+  pmr::allocator alc;
+  void *ph1 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
+  void *ph2 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
+  void *ph3 = std::malloc(pmr::holder<void, true>::full_sizeof<int>(10));
+  auto *h7 = ::new (ph1) pmr::holder<void, true>(alc, ::LIBIMP::types<int>{}, 10);
+  auto *h8 = static_cast<pmr::holder<void, true> *>(ph2);
+  auto *h9 = static_cast<pmr::holder<void, true> *>(ph3);
+  h7->copy_to(alc, ph2);
+  EXPECT_EQ(h7->count(), 10);
+  EXPECT_EQ(h8->count(), 10);
+  h7->move_to(alc, ph3);
+  EXPECT_EQ(h7->count(), 0);
+  EXPECT_EQ(h9->count(), 10);
+  h7->destroy(alc);
+  h8->destroy(alc);
+  h9->destroy(alc);
+  std::free(ph1);
+  std::free(ph2);
+  std::free(ph3);
+}
+
+TEST(pmr_small_storage, holder_copy_move_array_heap) {
+  pmr::allocator alc;
+  pmr::holder<void, false> h10(alc, ::LIBIMP::types<int>{}, 10);
+  pmr::holder<void, false> h11, h12;
+  h10.copy_to(alc, &h11);
+  EXPECT_EQ(h10.count(), 10);
+  EXPECT_EQ(h11.count(), 10);
+  h10.move_to(alc, &h12);
+  EXPECT_EQ(h10.count(), 0);
+  EXPECT_EQ(h12.count(), 10);
+  h10.destroy(alc);
+  h11.destroy(alc);
+  h12.destroy(alc);
+}
+
+TEST(pmr_small_storage, sizeof) {
+  EXPECT_EQ(sizeof(pmr::holder_null), sizeof(void *));
+  EXPECT_EQ(sizeof(pmr::holder<int, true>), sizeof(void *) + imp::round_up(sizeof(int), alignof(void *)));
+  EXPECT_EQ(sizeof(pmr::holder<int, false>), sizeof(void *) + sizeof(void *));
+  EXPECT_EQ(sizeof(pmr::holder<void, true>), imp::round_up(sizeof(void *) + sizeof(pmr::detail::holder_data), alignof(std::max_align_t)));
+  EXPECT_EQ(sizeof(pmr::holder<void, false>), sizeof(void *) + sizeof(void *));
+
+  // pmr::small_storage<4> s1;
+  EXPECT_GT(sizeof(pmr::small_storage<16>)  , 16);
+  EXPECT_GT(sizeof(pmr::small_storage<64>)  , 64);
+  EXPECT_GT(sizeof(pmr::small_storage<512>) , 512);
+  EXPECT_GT(sizeof(pmr::small_storage<4096>), 4096);
+}
+
+TEST(pmr_small_storage, construct) {
+  pmr::small_storage<64> ss;
+  SUCCEED();
+}
+
+TEST(pmr_small_storage, acquire) {
+  pmr::small_storage<128> ss;
+  pmr::allocator alc;
+  ASSERT_FALSE(ss.valid());
+  int *p = ss.acquire<int>(alc, 3);
+  ASSERT_TRUE(ss.valid());
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(*p, 3);
+  ASSERT_EQ(p, ss.as<int>());
+  ASSERT_EQ(ss.count(), 1);
+  ASSERT_EQ(ss.sizeof_heap(), 0);
+  ASSERT_EQ(ss.sizeof_type(), sizeof(int));
+
+  p = ss.acquire<int[]>(alc, 3);
+  ASSERT_TRUE(ss.valid());
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(p, ss.as<int>());
+  ASSERT_EQ(ss.count(), 3);
+  ASSERT_EQ(ss.sizeof_heap(), 0);
+  ASSERT_EQ(ss.sizeof_type(), sizeof(int));
+
+  p = ss.acquire<int[]>(alc, 30);
+  ASSERT_TRUE(ss.valid());
+  ASSERT_NE(p, nullptr);
+  ASSERT_EQ(p, ss.as<int>());
+  ASSERT_EQ(ss.count(), 30);
+  ASSERT_EQ(ss.sizeof_heap(), sizeof(int) * 30 + sizeof(pmr::detail::holder_info));
+  ASSERT_EQ(ss.sizeof_type(), sizeof(int));
+
+  ss.release(alc);
+  SUCCEED();
+}
diff --git a/test/test.h b/test/test.h
deleted file mode 100755
index 19bd22bf..00000000
--- a/test/test.h
+++ /dev/null
@@ -1,86 +0,0 @@
-#pragma once
-
-#include <iostream>
-#include <atomic>
-#include <thread>
-#include <string>
-#include <memory>
-#include <mutex>
-#include <utility>
-
-#include "gtest/gtest.h"
-
-#include "capo/stopwatch.hpp"
-
-#include "thread_pool.h"
-
-namespace ipc_ut {
-
-template <typename Dur>
-struct unit;
-
-template <> struct unit<std::chrono::nanoseconds> {
-    constexpr static char const * str() noexcept {
-        return "ns";
-    }
-};
-
-template <> struct unit<std::chrono::microseconds> {
-    constexpr static char const * str() noexcept {
-        return "us";
-    }
-};
-
-template <> struct unit<std::chrono::milliseconds> {
-    constexpr static char const * str() noexcept {
-        return "ms";
-    }
-};
-
-template <> struct unit<std::chrono::seconds> {
-    constexpr static char const * str() noexcept {
-        return "sec";
-    }
-};
-
-struct test_stopwatch {
-    capo::stopwatch<> sw_;
-    std::atomic_flag started_ = ATOMIC_FLAG_INIT;
-
-    void start() {
-        if (!started_.test_and_set()) {
-            sw_.start();
-        }
-    }
-
-    template <typename ToDur = std::chrono::nanoseconds>
-    void print_elapsed(int N, int Loops, char const * message = "") {
-        auto ts = sw_.elapsed<ToDur>();
-        std::cout << "[" << N << ", \t" << Loops << "] " << message << "\t"
-                  << (double(ts) / double(Loops)) << " " << unit<ToDur>::str() << std::endl;
-    }
-
-    template <int Factor, typename ToDur = std::chrono::nanoseconds>
-    void print_elapsed(int N, int M, int Loops, char const * message = "") {
-        auto ts = sw_.elapsed<ToDur>();
-        std::cout << "[" << N << "-" << M << ", \t" << Loops << "] " << message << "\t"
-                  << (double(ts) / double(Factor ? (Loops * Factor) : (Loops * N))) << " " << unit<ToDur>::str() << std::endl;
-    }
-
-    template <typename ToDur = std::chrono::nanoseconds>
-    void print_elapsed(int N, int M, int Loops, char const * message = "") {
-        print_elapsed<0, ToDur>(N, M, Loops, message);
-    }
-};
-
-inline static thread_pool & sender() {
-    static thread_pool pool;
-    return pool;
-}
-
-inline static thread_pool & reader() {
-    static thread_pool pool;
-    return pool;
-}
-
-} // namespace ipc_ut
\ No newline at end of file
diff --git a/test/test_ipc.cpp b/test/test_ipc.cpp
deleted file mode 100755
index a1f01083..00000000
--- a/test/test_ipc.cpp
+++ /dev/null
@@ -1,185 +0,0 @@
-
-#include <vector>
-#include <iostream>
-#include <mutex>
-#include <atomic>
-#include <cstring>
-
-#include "libipc/ipc.h"
-#include "libipc/buffer.h"
-#include "libipc/memory/resource.h"
-
-#include "test.h"
-#include "thread_pool.h"
-
-#include "capo/random.hpp"
-
-using namespace ipc;
-
-namespace {
-
-constexpr int LoopCount   = 10000;
-constexpr int MultiMax    = 8;
-constexpr int TestBuffMax = 65536;
-
-struct msg_head {
-    int id_;
-};
-
-class rand_buf : public buffer {
-public:
-    rand_buf() {
-        int size = capo::random<>{(int)sizeof(msg_head), TestBuffMax}();
-        *this = buffer(new char[size], size, [](void * p, std::size_t) {
-            delete [] static_cast<char *>(p);
-        });
-    }
-
-    rand_buf(msg_head const &msg) {
-        *this = buffer(new msg_head{msg}, sizeof(msg), [](void * p, std::size_t) {
-            delete static_cast<msg_head *>(p);
-        });
-    }
-
-    rand_buf(rand_buf &&) = default;
-    rand_buf(rand_buf const & rhs) {
-        if (rhs.empty()) return;
-        void * mem = new char[rhs.size()];
-        std::memcpy(mem, rhs.data(), rhs.size());
-        *this = buffer(mem, rhs.size(), [](void * p, std::size_t) {
-            delete [] static_cast<char *>(p);
-        });
-    }
-
-    rand_buf(buffer && rhs)
-        : buffer(std::move(rhs)) {
-    }
-
-    void set_id(int k) noexcept {
-        get<msg_head *>()->id_ = k;
-    }
-
-    int get_id() const noexcept {
-        return get<msg_head *>()->id_;
-    }
-
-    using buffer::operator=;
-};
-
-template <relat Rp, relat Rc, trans Ts>
-void test_basic(char const * name) {
-    using que_t = chan<Rp, Rc, Ts>;
-    rand_buf test1, test2;
-
-    que_t que1 { name };
-    EXPECT_FALSE(que1.send(test1));
-    EXPECT_FALSE(que1.try_send(test2));
-
-    que_t que2 { que1.name(), ipc::receiver };
-    ASSERT_TRUE(que1.send(test1));
-    ASSERT_TRUE(que1.try_send(test2));
-
-    EXPECT_EQ(que2.recv(), test1);
-    EXPECT_EQ(que2.recv(), test2);
-}
-
-class data_set {
-    std::vector<rand_buf> datas_;
-
-public:
-    data_set() {
-        datas_.resize(LoopCount);
-        for (int i = 0; i < LoopCount; ++i) {
-            datas_[i].set_id(i);
-        }
-    }
-
-    std::vector<rand_buf> const &get() const noexcept {
-        return datas_;
-    }
-} const data_set__;
-
-template <relat Rp, relat Rc, trans Ts, typename Que = chan<Rp, Rc, Ts>>
-void test_sr(char const * name, int s_cnt, int r_cnt) {
-    ipc_ut::sender().start(static_cast<std::size_t>(s_cnt));
-    ipc_ut::reader().start(static_cast<std::size_t>(r_cnt));
-
-    std::atomic_thread_fence(std::memory_order_seq_cst);
-    ipc_ut::test_stopwatch sw;
-
-    for (int k = 0; k < s_cnt; ++k) {
-        ipc_ut::sender() << [name, &sw, r_cnt, k] {
-            Que que { name, ipc::sender };
-            ASSERT_TRUE(que.wait_for_recv(r_cnt));
-            sw.start();
-            for (int i = 0; i < (int)data_set__.get().size(); ++i) {
-                ASSERT_TRUE(que.send(data_set__.get()[i]));
-            }
-        };
-    }
-
-    for (int k = 0; k < r_cnt; ++k) {
-        ipc_ut::reader() << [name] {
-            Que que { name, ipc::receiver };
-            for (;;) {
-                rand_buf got { que.recv() };
-                ASSERT_FALSE(got.empty());
-                int i = got.get_id();
-                if (i == -1) {
-                    return;
-                }
-                ASSERT_TRUE((i >= 0) && (i < (int)data_set__.get().size()));
-                auto const &data_set = data_set__.get()[i];
-                if (data_set != got) {
-                    printf("data_set__.get()[%d] != got, size = %zd/%zd\n", 
-                            i, data_set.size(), got.size());
-                    ASSERT_TRUE(false);
-                }
-            }
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    Que que { name };
-    ASSERT_TRUE(que.wait_for_recv(r_cnt));
-    for (int k = 0; k < r_cnt; ++k) {
-        que.send(rand_buf{msg_head{-1}});
-    }
-    ipc_ut::reader().wait_for_done();
-    sw.print_elapsed<std::chrono::microseconds>(s_cnt, r_cnt, (int)data_set__.get().size(), name);
-}
-
-} // internal-linkage
-
-TEST(IPC, basic) {
-    test_basic<relat::single, relat::single, trans::unicast  >("ssu");
-    //test_basic<relat::single, relat::multi , trans::unicast  >("smu");
-    //test_basic<relat::multi , relat::multi , trans::unicast  >("mmu");
-    test_basic<relat::single, relat::multi , trans::broadcast>("smb");
-    test_basic<relat::multi , relat::multi , trans::broadcast>("mmb");
-}
-
-TEST(IPC, 1v1) {
-    test_sr<relat::single, relat::single, trans::unicast  >("ssu", 1, 1);
-    //test_sr<relat::single, relat::multi , trans::unicast  >("smu", 1, 1);
-    //test_sr<relat::multi , relat::multi , trans::unicast  >("mmu", 1, 1);
-    test_sr<relat::single, relat::multi , trans::broadcast>("smb", 1, 1);
-    test_sr<relat::multi , relat::multi , trans::broadcast>("mmb", 1, 1);
-}
-
-TEST(IPC, 1vN) {
-    //test_sr<relat::single, relat::multi , trans::unicast  >("smu", 1, MultiMax);
-    //test_sr<relat::multi , relat::multi , trans::unicast  >("mmu", 1, MultiMax);
-    test_sr<relat::single, relat::multi , trans::broadcast>("smb", 1, MultiMax);
-    test_sr<relat::multi , relat::multi , trans::broadcast>("mmb", 1, MultiMax);
-}
-
-TEST(IPC, Nv1) {
-    //test_sr<relat::multi , relat::multi , trans::unicast  >("mmu", MultiMax, 1);
-    test_sr<relat::multi , relat::multi , trans::broadcast>("mmb", MultiMax, 1);
-}
-
-TEST(IPC, NvN) {
-    //test_sr<relat::multi , relat::multi , trans::unicast  >("mmu", MultiMax, MultiMax);
-    test_sr<relat::multi , relat::multi , trans::broadcast>("mmb", MultiMax, MultiMax);
-}
diff --git a/test/test_mem.cpp b/test/test_mem.cpp
deleted file mode 100755
index 16a5ad1d..00000000
--- a/test/test_mem.cpp
+++ /dev/null
@@ -1,218 +0,0 @@
-#include <vector>
-#include <array>
-#include <thread>
-#include <atomic>
-#include <cstddef>
-
-#include "capo/random.hpp"
-
-#include "libipc/memory/resource.h"
-#include "libipc/pool_alloc.h"
-
-// #include "gperftools/tcmalloc.h"
-
-#include "test.h"
-#include "thread_pool.h"
-
-namespace {
-
-constexpr int DataMin   = 4;
-constexpr int DataMax   = 256;
-constexpr int LoopCount = 8388608;
-constexpr int ThreadMax = 8;
-
-// constexpr int DataMin   = 256;
-// constexpr int DataMax   = 512;
-// constexpr int LoopCount = 2097152;
-
-std::vector<std::size_t> sizes__;
-std::vector<void*> ptr_cache__[ThreadMax];
-
-template <typename M>
-struct alloc_ix_t {
-    static std::vector<int> ix_;
-    static bool inited_;
-
-    alloc_ix_t() {
-        if (inited_) return;
-        inited_ = true;
-        M::init();
-    }
-
-    template <int ThreadsN>
-    static int index(std::size_t /*pid*/, std::size_t /*k*/, std::size_t n) {
-        return ix_[n];
-    }
-};
-
-template <typename M>
-std::vector<int> alloc_ix_t<M>::ix_(LoopCount);
-template <typename M>
-bool alloc_ix_t<M>::inited_ = false;
-
-struct alloc_FIFO : alloc_ix_t<alloc_FIFO> {
-    static void init() {
-        for (int i = 0; i < LoopCount; ++i) {
-            ix_[static_cast<std::size_t>(i)] = i;
-        }
-    }
-};
-
-struct alloc_LIFO : alloc_ix_t<alloc_LIFO> {
-    static void init() {
-        for (int i = 0; i < LoopCount; ++i) {
-            ix_[static_cast<std::size_t>(i)] = i;
-        }
-    }
-
-    template <int ThreadsN>
-    static int index(std::size_t pid, std::size_t k, std::size_t n) {
-        constexpr static int CacheSize = LoopCount / ThreadsN;
-        if (k) {
-            return ix_[(CacheSize * (2 * pid + 1)) - 1 - n];
-        }
-        else return ix_[n];
-    }
-};
-
-struct alloc_Random : alloc_ix_t<alloc_Random> {
-    static void init() {
-        capo::random<> rdm_index(0, LoopCount - 1);
-        for (int i = 0; i < LoopCount; ++i) {
-            ix_[static_cast<std::size_t>(i)] = rdm_index();
-        }
-    }
-};
-
-struct Init {
-    Init() {
-        capo::random<> rdm{ DataMin, DataMax };
-        for (int i = 0; i < LoopCount; ++i) {
-            sizes__.emplace_back(static_cast<std::size_t>(rdm()));
-        }
-        for (auto& vec : ptr_cache__) {
-            vec.resize(LoopCount, nullptr);
-        }
-    }
-} init__;
-
-template <typename AllocT, int ThreadsN>
-void benchmark_alloc(char const * message) {
-    std::string msg = std::to_string(ThreadsN) + "\t" + message;
-
-    constexpr static int CacheSize = LoopCount / ThreadsN;
-    ipc_ut::sender().start(static_cast<std::size_t>(ThreadsN));
-    ipc_ut::test_stopwatch sw;
-
-    for (int pid = 0; pid < ThreadsN; ++pid) {
-        ipc_ut::sender() << [&, pid] {
-            sw.start();
-            for (int n = (CacheSize * pid); n < (CacheSize * (pid + 1)); ++n) {
-                std::size_t s = sizes__[n];
-                AllocT::free(AllocT::alloc(s), s);
-            }
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    sw.print_elapsed<1>(DataMin, DataMax, LoopCount, msg.c_str());
-}
-
-template <typename AllocT, typename ModeT, int ThreadsN>
-void benchmark_alloc(char const * message) {
-    std::string msg = std::to_string(ThreadsN) + "\t" + message;
-
-    constexpr static int CacheSize = LoopCount / ThreadsN;
-    ModeT mode;
-    ipc_ut::sender().start(static_cast<std::size_t>(ThreadsN));
-    ipc_ut::test_stopwatch sw;
-
-    for (int pid = 0; pid < ThreadsN; ++pid) {
-        ipc_ut::sender() << [&, pid] {
-            auto& vec = ptr_cache__[pid];
-            sw.start();
-            for (std::size_t k = 0; k < 2; ++k)
-            for (int n = (CacheSize * pid); n < (CacheSize * (pid + 1)); ++n) {
-                int    m = mode.template index<ThreadsN>(pid, k, n);
-                void*& p = vec[static_cast<std::size_t>(m)];
-                std::size_t s  = sizes__[static_cast<std::size_t>(m)];
-                if (p == nullptr) {
-                    p = AllocT::alloc(s);
-                }
-                else {
-                    AllocT::free(p, s);
-                    p = nullptr;
-                }
-            }
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    sw.print_elapsed<1>(DataMin, DataMax, LoopCount, msg.c_str());
-}
-
-template <typename AllocT, typename ModeT, int ThreadsN>
-struct test_performance {
-    static void start(char const * message) {
-        test_performance<AllocT, ModeT, ThreadsN / 2>::start(message);
-        benchmark_alloc<AllocT, ModeT, ThreadsN>(message);
-    }
-};
-
-template <typename AllocT, typename ModeT>
-struct test_performance<AllocT, ModeT, 1> {
-    static void start(char const * message) {
-        benchmark_alloc<AllocT, ModeT, 1>(message);
-    }
-};
-
-template <typename AllocT, int ThreadsN>
-struct test_performance<AllocT, void, ThreadsN> {
-    static void start(char const * message) {
-        test_performance<AllocT, void, ThreadsN / 2>::start(message);
-        benchmark_alloc<AllocT, ThreadsN>(message);
-    }
-};
-
-template <typename AllocT>
-struct test_performance<AllocT, void, 1> {
-    static void start(char const * message) {
-        benchmark_alloc<AllocT, 1>(message);
-    }
-};
-
-// class tc_alloc {
-// public:
-//    static void clear() {}
-
-//    static void* alloc(std::size_t size) {
-//        return size ? tc_malloc(size) : nullptr;
-//    }
-
-//    static void free(void* p, std::size_t size) {
-//        tc_free_sized(p, size);
-//    }
-// };
-/*
-TEST(Memory, static_alloc) {
-    test_performance<ipc::mem::static_alloc, void        , ThreadMax>::start("alloc-free");
-    test_performance<ipc::mem::static_alloc, alloc_FIFO  , ThreadMax>::start("alloc-FIFO");
-    test_performance<ipc::mem::static_alloc, alloc_LIFO  , ThreadMax>::start("alloc-LIFO");
-    test_performance<ipc::mem::static_alloc, alloc_Random, ThreadMax>::start("alloc-Rand");
-}
-
-TEST(Memory, pool_alloc) {
-    test_performance<ipc::mem::async_pool_alloc, void        , ThreadMax>::start("alloc-free");
-    test_performance<ipc::mem::async_pool_alloc, alloc_FIFO  , ThreadMax>::start("alloc-FIFO");
-    test_performance<ipc::mem::async_pool_alloc, alloc_LIFO  , ThreadMax>::start("alloc-LIFO");
-    test_performance<ipc::mem::async_pool_alloc, alloc_Random, ThreadMax>::start("alloc-Rand");
-}
-*/
-// TEST(Memory, tc_alloc) {
-//     test_performance<tc_alloc, void       , ThreadMax>::start();
-//     test_performance<tc_alloc, alloc_FIFO  , ThreadMax>::start();
-//     test_performance<tc_alloc, alloc_LIFO  , ThreadMax>::start();
-//     test_performance<tc_alloc, alloc_Random, ThreadMax>::start();
-// }
-
-} // internal-linkage
diff --git a/test/test_platform.cpp b/test/test_platform.cpp
deleted file mode 100644
index 65fa5135..00000000
--- a/test/test_platform.cpp
+++ /dev/null
@@ -1,31 +0,0 @@
-#if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
-    defined(WINCE) || defined(_WIN32_WCE)
-
-#include <locale>
-#include <iostream>
-//#include <fstream>
-
-#include "test.h"
-
-#include "libipc/platform/win/to_tchar.h"
-
-TEST(Platform, to_tchar) {
-    char const *utf8 = "hello world, "
-                       "\xe4\xbd\xa0\xe5\xa5\xbd\xef\xbc"
-                       "\x8c\xe3\x81\x93\xe3\x82\x93\xe3"
-                       "\x81\xab\xe3\x81\xa1\xe3\x81\xaf";
-    wchar_t const *utf16 = L"hello world, \u4f60\u597d\uff0c\u3053\u3093\u306b\u3061\u306f";
-    {
-        ipc::string str = ipc::detail::to_tchar<char>(utf8);
-        EXPECT_STREQ(str.c_str(), utf8);
-    }
-    {
-        ipc::wstring wtr = ipc::detail::to_tchar<wchar_t>(utf8);
-        EXPECT_STREQ(wtr.c_str(), utf16);
-        //std::ofstream out("out.txt", std::ios::binary|std::ios::out);
-        //out.write((char const *)wtr.c_str(), wtr.size() * sizeof(wchar_t));
-    }
-}
-
-#endif/*WIN*/
\ No newline at end of file
diff --git a/test/test_queue.cpp b/test/test_queue.cpp
deleted file mode 100755
index e85d39fa..00000000
--- a/test/test_queue.cpp
+++ /dev/null
@@ -1,304 +0,0 @@
-#include <iostream>
-#include <string>
-#include <type_traits>
-#include <memory>
-#include <new>
-#include <vector>
-#include <unordered_map>
-#include <climits>  // CHAR_BIT
-
-#include "libipc/prod_cons.h"
-#include "libipc/policy.h"
-#include "libipc/circ/elem_array.h"
-#include "libipc/queue.h"
-
-#include "test.h"
-
-namespace {
-
-struct msg_t {
-    int pid_;
-    int dat_;
-
-    msg_t() = default;
-    msg_t(int p, int d) : pid_(p), dat_(d) {}
-};
-
-template <ipc::relat Rp, ipc::relat Rc, ipc::trans Ts>
-using queue_t = ipc::queue<msg_t, ipc::policy::choose<ipc::circ::elem_array, ipc::wr<Rp, Rc, Ts>>>;
-
-template <ipc::relat Rp, ipc::relat Rc, ipc::trans Ts>
-struct elems_t : public queue_t<Rp, Rc, Ts>::elems_t {};
-
-bool operator==(msg_t const & m1, msg_t const & m2) noexcept {
-    return (m1.pid_ == m2.pid_) && (m1.dat_ == m2.dat_);
-}
-
-bool operator!=(msg_t const & m1, msg_t const & m2) noexcept {
-    return !(m1 == m2);
-}
-
-constexpr int LoopCount = 1000000;
-constexpr int PushRetry = 1000000;
-constexpr int ThreadMax = 8;
-
-template <typename Que>
-void push(Que & que, int p, int d) {
-    for (int n = 0; !que.push([](void*) { return true; }, p, d); ++n) {
-        ASSERT_NE(n, PushRetry);
-        std::this_thread::yield();
-    }
-}
-
-template <typename Que>
-msg_t pop(Que & que) {
-    msg_t msg;
-    while (!que.pop(msg)) {
-        std::this_thread::yield();
-    }
-    return msg;
-}
-
-template <ipc::trans Ts>
-struct quitter;
-
-template <>
-struct quitter<ipc::trans::unicast> {
-    template <typename Que>
-    static void emit(Que && que, int r_cnt) {
-        for (int k = 0; k < r_cnt; ++k) {
-            push(que, -1, -1);
-        }
-    }
-};
-
-template <>
-struct quitter<ipc::trans::broadcast> {
-    template <typename Que>
-    static void emit(Que && que, int /*r_cnt*/) {
-        push(que, -1, -1);
-    }
-};
-
-template <ipc::relat Rp, ipc::relat Rc, ipc::trans Ts>
-void test_sr(elems_t<Rp, Rc, Ts> && elems, int s_cnt, int r_cnt, char const * message) {
-    ipc_ut::sender().start(static_cast<std::size_t>(s_cnt));
-    ipc_ut::reader().start(static_cast<std::size_t>(r_cnt));
-    ipc_ut::test_stopwatch sw;
-
-    for (int k = 0; k < s_cnt; ++k) {
-        ipc_ut::sender() << [&elems, &sw, r_cnt, k] {
-            queue_t<Rp, Rc, Ts> que { &elems };
-            while (que.conn_count() != static_cast<std::size_t>(r_cnt)) {
-                std::this_thread::yield();
-            }
-            sw.start();
-            for (int i = 0; i < LoopCount; ++i) {
-                push(que, k, i);
-            }
-        };
-    }
-    for (int k = 0; k < r_cnt; ++k) {
-        ipc_ut::reader() << [&elems, k] {
-            queue_t<Rp, Rc, Ts> que { &elems };
-            ASSERT_TRUE(que.connect());
-            while (pop(que).pid_ >= 0) ;
-            ASSERT_TRUE(que.disconnect());
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    quitter<Ts>::emit(queue_t<Rp, Rc, Ts> { &elems }, r_cnt);
-    ipc_ut::reader().wait_for_done();
-    sw.print_elapsed(s_cnt, r_cnt, LoopCount, message);
-}
-
-} // internal-linkage
-
-TEST(Queue, check_size) {
-    using el_t = elems_t<ipc::relat::single, ipc::relat::multi, ipc::trans::broadcast>;
-
-    std::cout << "cq_t::head_size  = " << el_t::head_size << std::endl;
-    std::cout << "cq_t::data_size  = " << el_t::data_size << std::endl;
-    std::cout << "cq_t::elem_size  = " << el_t::elem_size << std::endl;
-    std::cout << "cq_t::block_size = " << el_t::block_size << std::endl;
-
-    EXPECT_EQ(static_cast<std::size_t>(el_t::data_size), sizeof(msg_t));
-
-    std::cout << "sizeof(elems_t<s, m, b>) = " << sizeof(el_t) << std::endl;
-}
-
-TEST(Queue, el_connection) {
-    {
-        elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> el;
-        EXPECT_TRUE(el.connect_sender());
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_FALSE(el.connect_sender());
-        }
-        el.disconnect_sender();
-        EXPECT_TRUE(el.connect_sender());
-    }
-    {
-        elems_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::unicast> el;
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(el.connect_sender());
-        }
-    }
-    {
-        elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> el;
-        auto cc = el.connect_receiver();
-        EXPECT_NE(cc, 0);
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_EQ(el.connect_receiver(), 0);
-        }
-        EXPECT_EQ(el.disconnect_receiver(cc), 0);
-        EXPECT_EQ(el.connect_receiver(), cc);
-    }
-    {
-        elems_t<ipc::relat::single, ipc::relat::multi, ipc::trans::broadcast> el;
-        for (std::size_t i = 0; i < (sizeof(ipc::circ::cc_t) * CHAR_BIT); ++i) {
-            ASSERT_NE(el.connect_receiver(), 0);
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_EQ(el.connect_receiver(), 0);
-        }
-    }
-}
-
-TEST(Queue, connection) {
-    {
-        elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> el;
-        queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-        // sending
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(que.ready_sending());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            ASSERT_FALSE(que.ready_sending());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            que.shut_sending();
-        }
-        {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            EXPECT_TRUE(que.ready_sending());
-        }
-        // receiving
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(que.connect());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            ASSERT_FALSE(que.connect());
-        }
-        EXPECT_TRUE(que.disconnect());
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_FALSE(que.disconnect());
-        }
-        {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            EXPECT_TRUE(que.connect());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast> que{&el};
-            ASSERT_FALSE(que.connect());
-        }
-    }
-    {
-        elems_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> el;
-        queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-        // sending
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(que.ready_sending());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.ready_sending());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            que.shut_sending();
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.ready_sending());
-        }
-        // receiving
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_TRUE(que.connect());
-        }
-        for (std::size_t i = 1; i < (sizeof(ipc::circ::cc_t) * CHAR_BIT); ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.connect());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_FALSE(que.connect());
-        }
-        ASSERT_TRUE(que.disconnect());
-        for (std::size_t i = 0; i < 10000; ++i) {
-            ASSERT_FALSE(que.disconnect());
-        }
-        {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_TRUE(que.connect());
-        }
-        for (std::size_t i = 0; i < 10000; ++i) {
-            queue_t<ipc::relat::multi, ipc::relat::multi, ipc::trans::broadcast> que{&el};
-            ASSERT_FALSE(que.connect());
-        }
-    }
-}
-
-TEST(Queue, prod_cons_1v1_unicast) {
-    test_sr(elems_t<ipc::relat::single, ipc::relat::single, ipc::trans::unicast>{}, 1, 1, "ssu");
-    test_sr(elems_t<ipc::relat::single, ipc::relat::multi , ipc::trans::unicast>{}, 1, 1, "smu");
-    test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, 1, 1, "mmu");
-}
-
-TEST(Queue, prod_cons_1v1_broadcast) {
-    test_sr(elems_t<ipc::relat::single, ipc::relat::multi , ipc::trans::broadcast>{}, 1, 1, "smb");
-    test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, 1, 1, "mmb");
-}
-
-TEST(Queue, prod_cons_1vN_unicast) {
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::single, ipc::relat::multi , ipc::trans::unicast>{}, 1, i, "smu");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, 1, i, "mmu");
-    }
-}
-
-TEST(Queue, prod_cons_1vN_broadcast) {
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::single, ipc::relat::multi , ipc::trans::broadcast>{}, 1, i, "smb");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, 1, i, "mmb");
-    }
-}
-
-TEST(Queue, prod_cons_NvN_unicast) {
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, 1, i, "mmu");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, i, 1, "mmu");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::unicast>{}, i, i, "mmu");
-    }
-}
-
-TEST(Queue, prod_cons_NvN_broadcast) {
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, 1, i, "mmb");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, i, 1, "mmb");
-    }
-    for (int i = 1; i <= ThreadMax; ++i) {
-        test_sr(elems_t<ipc::relat::multi , ipc::relat::multi , ipc::trans::broadcast>{}, i, i, "mmb");
-    }
-}
diff --git a/test/test_shm.cpp b/test/test_shm.cpp
deleted file mode 100755
index 3272dcc6..00000000
--- a/test/test_shm.cpp
+++ /dev/null
@@ -1,102 +0,0 @@
-#include <cstring>
-#include <cstdint>
-#include <thread>
-
-#include "libipc/shm.h"
-#include "test.h"
-
-using namespace ipc::shm;
-
-namespace {
-
-TEST(SHM, acquire) {
-    handle shm_hd;
-    EXPECT_FALSE(shm_hd.valid());
-
-    EXPECT_TRUE(shm_hd.acquire("my-test-1", 1024));
-    EXPECT_TRUE(shm_hd.valid());
-    EXPECT_STREQ(shm_hd.name(), "my-test-1");
-
-    EXPECT_TRUE(shm_hd.acquire("my-test-2", 2048));
-    EXPECT_TRUE(shm_hd.valid());
-    EXPECT_STREQ(shm_hd.name(), "my-test-2");
-
-    EXPECT_TRUE(shm_hd.acquire("my-test-3", 4096));
-    EXPECT_TRUE(shm_hd.valid());
-    EXPECT_STREQ(shm_hd.name(), "my-test-3");
-}
-
-TEST(SHM, release) {
-    handle shm_hd;
-    EXPECT_FALSE(shm_hd.valid());
-    shm_hd.release();
-    EXPECT_FALSE(shm_hd.valid());
-    EXPECT_TRUE(shm_hd.acquire("release-test-1", 512));
-    EXPECT_TRUE(shm_hd.valid());
-    shm_hd.release();
-    EXPECT_FALSE(shm_hd.valid());
-}
-
-TEST(SHM, get) {
-    handle shm_hd;
-    EXPECT_TRUE(shm_hd.get() == nullptr);
-    EXPECT_TRUE(shm_hd.acquire("get-test", 2048));
-
-    auto mem = shm_hd.get();
-    EXPECT_TRUE(mem != nullptr);
-    EXPECT_TRUE(mem == shm_hd.get());
-
-    std::uint8_t buf[1024] = {};
-    EXPECT_TRUE(memcmp(mem, buf, sizeof(buf)) == 0);
-
-    handle shm_other(shm_hd.name(), shm_hd.size());
-    EXPECT_TRUE(shm_other.get() != shm_hd.get());
-}
-
-TEST(SHM, hello) {
-    handle shm_hd;
-    EXPECT_TRUE(shm_hd.acquire("hello-test", 128));
-    auto mem = shm_hd.get();
-    EXPECT_TRUE(mem != nullptr);
-
-    constexpr char hello[] = "hello!";
-    std::memcpy(mem, hello, sizeof(hello));
-    EXPECT_STREQ((char const *)shm_hd.get(), hello);
-
-    shm_hd.release();
-    EXPECT_TRUE(shm_hd.get() == nullptr);
-    EXPECT_TRUE(shm_hd.acquire("hello-test", 1024));
-
-    mem = shm_hd.get();
-    EXPECT_TRUE(mem != nullptr);
-    std::uint8_t buf[1024] = {};
-    EXPECT_TRUE(memcmp(mem, buf, sizeof(buf)) == 0);
-
-    std::memcpy(mem, hello, sizeof(hello));
-    EXPECT_STREQ((char const *)shm_hd.get(), hello);
-}
-
-TEST(SHM, mt) {
-    handle shm_hd;
-    EXPECT_TRUE(shm_hd.acquire("mt-test", 256));
-    constexpr char hello[] = "hello!";
-    std::memcpy(shm_hd.get(), hello, sizeof(hello));
-
-    std::thread {
-        [&shm_hd] {
-            handle shm_mt(shm_hd.name(), shm_hd.size());
-            shm_hd.release();
-            constexpr char hello[] = "hello!";
-            EXPECT_STREQ((char const *)shm_mt.get(), hello);
-        }
-    }.join();
-
-    EXPECT_TRUE(shm_hd.get() == nullptr);
-    EXPECT_FALSE(shm_hd.valid());
-
-    EXPECT_TRUE(shm_hd.acquire("mt-test", 1024));
-    std::uint8_t buf[1024] = {};
-    EXPECT_TRUE(memcmp(shm_hd.get(), buf, sizeof(buf)) == 0);
-}
-
-} // internal-linkage
diff --git a/test/test_sync.cpp b/test/test_sync.cpp
deleted file mode 100644
index 4cb82e68..00000000
--- a/test/test_sync.cpp
+++ /dev/null
@@ -1,208 +0,0 @@
-
-#include <thread>
-#include <iostream>
-#include <mutex>
-#include <chrono>
-#include <deque>
-#include <array>
-#include <cstdio>
-
-#include "test.h"
-
-#include "libipc/platform/detail.h"
-#if defined(IPC_OS_LINUX_)
-#include <pthread.h>
-#include <time.h>
-
-TEST(PThread, Robust) {
-    pthread_mutexattr_t ma;
-    pthread_mutexattr_init(&ma);
-    pthread_mutexattr_setpshared(&ma, PTHREAD_PROCESS_SHARED);
-    pthread_mutexattr_setrobust(&ma, PTHREAD_MUTEX_ROBUST);
-    pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
-    pthread_mutex_init(&mutex, &ma);
-
-    std::thread{[&mutex] {
-        pthread_mutex_lock(&mutex);
-        // pthread_mutex_unlock(&mutex);
-    }}.join();
-
-    struct timespec tout;
-    clock_gettime(CLOCK_REALTIME, &tout);
-    int r = pthread_mutex_timedlock(&mutex, &tout);
-    EXPECT_EQ(r, EOWNERDEAD);
-
-    pthread_mutex_consistent(&mutex);
-    pthread_mutex_unlock(&mutex);
-    pthread_mutex_destroy(&mutex);
-}
-#elif defined(IPC_OS_WINDOWS_)
-#include <Windows.h>
-#include <tchar.h>
-
-TEST(PThread, Robust) {
-    HANDLE lock = CreateMutex(NULL, FALSE, _T("test-robust"));
-    std::thread{[] {
-        HANDLE lock = CreateMutex(NULL, FALSE, _T("test-robust"));
-        WaitForSingleObject(lock, 0);
-    }}.join();
-
-    DWORD r = WaitForSingleObject(lock, 0);
-    EXPECT_EQ(r, WAIT_ABANDONED);
-
-    CloseHandle(lock);
-}
-#endif // OS
-
-#include "libipc/mutex.h"
-
-TEST(Sync, Mutex) {
-    ipc::sync::mutex lock;
-    EXPECT_TRUE(lock.open("test-mutex-robust"));
-    std::thread{[] {
-        ipc::sync::mutex lock {"test-mutex-robust"};
-        EXPECT_TRUE(lock.valid());
-        EXPECT_TRUE(lock.lock());
-    }}.join();
-
-    EXPECT_THROW(lock.try_lock(), std::system_error);
-
-    // int i = 0;
-    // EXPECT_TRUE(lock.lock());
-    // i = 100;
-    // auto t2 = std::thread{[&i] {
-    //     ipc::sync::mutex lock {"test-mutex-robust"};
-    //     EXPECT_TRUE(lock.valid());
-    //     EXPECT_FALSE(lock.try_lock());
-    //     EXPECT_TRUE(lock.lock());
-    //     i += i;
-    //     EXPECT_TRUE(lock.unlock());
-    // }};
-    // std::this_thread::sleep_for(std::chrono::seconds(1));
-    // EXPECT_EQ(i, 100);
-    // EXPECT_TRUE(lock.unlock());
-    // t2.join();
-    // EXPECT_EQ(i, 200);
-}
-
-#include "libipc/semaphore.h"
-
-TEST(Sync, Semaphore) {
-    ipc::sync::semaphore sem;
-    EXPECT_TRUE(sem.open("test-sem"));
-    std::thread{[] {
-        ipc::sync::semaphore sem {"test-sem"};
-        EXPECT_TRUE(sem.post(1000));
-    }}.join();
-
-    for (int i = 0; i < 1000; ++i) {
-        EXPECT_TRUE(sem.wait(0));
-    }
-    EXPECT_FALSE(sem.wait(0));
-}
-
-#include "libipc/condition.h"
-
-TEST(Sync, Condition) {
-    ipc::sync::condition cond;
-    EXPECT_TRUE(cond.open("test-cond"));
-    ipc::sync::mutex lock;
-    EXPECT_TRUE(lock.open("test-mutex"));
-    std::deque<int> que;
-
-    auto job = [&que](int num) {
-        ipc::sync::condition cond {"test-cond"};
-        ipc::sync::mutex lock {"test-mutex"};
-        for (int i = 0; i < 10; ++i) {
-            int val = 0;
-            {
-                std::lock_guard<ipc::sync::mutex> guard {lock};
-                while (que.empty()) {
-                    ASSERT_TRUE(cond.wait(lock));
-                }
-                val = que.front();
-                que.pop_front();
-            }
-            EXPECT_NE(val, 0);
-            std::printf("test-cond-%d: %d\n", num, val);
-        }
-        for (;;) {
-            int val = 0;
-            {
-                std::lock_guard<ipc::sync::mutex> guard {lock};
-                while (que.empty()) {
-                    EXPECT_TRUE(cond.wait(lock, 1000));
-                }
-                val = que.front();
-                que.pop_front();
-            }
-            if (val == 0) {
-                std::printf("test-cond-%d: exit.\n", num);
-                return;
-            }
-            std::printf("test-cond-%d: %d\n", num, val);
-        }
-    };
-    std::array<std::thread, 10> test_conds;
-    for (int i = 0; i < (int)test_conds.size(); ++i) {
-        test_conds[i] = std::thread{job, i};
-    }
-
-    for (int i = 1; i < 100; ++i) {
-        {
-            std::lock_guard<ipc::sync::mutex> guard {lock};
-            que.push_back(i);
-            ASSERT_TRUE(cond.notify(lock));
-        }
-        std::this_thread::sleep_for(std::chrono::milliseconds(20));
-    }
-    for (int i = 1; i < 100; ++i) {
-        {
-            std::lock_guard<ipc::sync::mutex> guard {lock};
-            que.push_back(i);
-            ASSERT_TRUE(cond.broadcast(lock));
-        }
-        std::this_thread::sleep_for(std::chrono::milliseconds(20));
-    }
-    {
-        std::lock_guard<ipc::sync::mutex> guard {lock};
-        for (int i = 0; i < (int)test_conds.size(); ++i) {
-            que.push_back(0);
-        }
-        ASSERT_TRUE(cond.broadcast(lock));
-    }
-
-    for (auto &t : test_conds) t.join();
-}
-
-/**
- * https://stackoverflow.com/questions/51730660/is-this-a-bug-in-glibc-pthread
-*/
-TEST(Sync, ConditionRobust) {
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 1\n");
-    ipc::sync::condition cond {"test-cond"};
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 2\n");
-    ipc::sync::mutex lock {"test-mutex"};
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 3\n");
-    ASSERT_TRUE(lock.lock());
-    std::thread unlock {[] {
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 1\n");
-        ipc::sync::condition cond {"test-cond"};
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 2\n");
-        ipc::sync::mutex lock {"test-mutex"};
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 3\n");
-        {
-            std::lock_guard<ipc::sync::mutex> guard {lock};
-        }
-        std::this_thread::sleep_for(std::chrono::seconds(1));
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 4\n");
-        ASSERT_TRUE(cond.broadcast(lock));
-        printf("WWWWWWWWWWWWWWWWWWWWWWWWWWWWWW 5\n");
-    }};
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 4\n");
-    ASSERT_TRUE(cond.wait(lock));
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 5\n");
-    ASSERT_TRUE(lock.unlock());
-    printf("XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX 6\n");
-    unlock.join();
-}
\ No newline at end of file
diff --git a/test/test_thread_utility.cpp b/test/test_thread_utility.cpp
deleted file mode 100755
index 02dd0c23..00000000
--- a/test/test_thread_utility.cpp
+++ /dev/null
@@ -1,203 +0,0 @@
-#include <type_traits>
-#include <iostream>
-#include <shared_mutex> // std::shared_lock
-#include <utility>
-#include <thread>
-#include <future>       // std::async
-#include <atomic>
-#include <string>       // std::string
-
-#include "capo/spin_lock.hpp"
-#include "capo/type_name.hpp"
-
-#include "libipc/rw_lock.h"
-
-#include "test.h"
-#include "thread_pool.h"
-
-namespace {
-
-constexpr int LoopCount = 100000;
-constexpr int ThreadMax = 8;
-
-template <typename T>
-constexpr T acc(T b, T e) noexcept {
-    return (e + b) * (e - b + 1) / 2;
-}
-
-template <typename Mutex>
-struct lc_wrapper : Mutex {
-    void lock_shared  () { Mutex::lock  (); }
-    void unlock_shared() { Mutex::unlock(); }
-};
-
-template <typename Lc, int Loops = LoopCount>
-void benchmark_lc(int w, int r, char const * message) {
-    ipc_ut::sender().start(static_cast<std::size_t>(w));
-    ipc_ut::reader().start(static_cast<std::size_t>(r));
-    ipc_ut::test_stopwatch sw;
-
-    std::uint64_t data = 0;
-    std::uint64_t sum  = acc<std::uint64_t>(1, Loops) * w;
-    Lc lc;
-
-    for (int k = 0; k < r; ++k) {
-        ipc_ut::reader() << [sum, &lc, &data] {
-            while (1) {
-                {
-                    std::shared_lock<Lc> guard { lc };
-                    if (data == sum) break;
-                }
-                std::this_thread::yield();
-            }
-        };
-    }
-
-    for (int k = 0; k < w; ++k) {
-        ipc_ut::sender() << [&sw, &lc, &data] {
-            sw.start();
-            for (int i = 1; i <= Loops; ++i) {
-                {
-                    std::lock_guard<Lc> guard { lc };
-                    data += i;
-                }
-                std::this_thread::yield();
-            }
-        };
-    }
-
-    ipc_ut::sender().wait_for_done();
-    sw.print_elapsed(w, r, Loops, message);
-    ipc_ut::reader().wait_for_done();
-}
-
-void test_lock_performance(int w, int r) {
-    std::cout << "test_lock_performance: [" << w << "-" << r << "]" << std::endl;
-    benchmark_lc<ipc::rw_lock               >(w, r, "ipc::rw_lock");
-    benchmark_lc<lc_wrapper< ipc::spin_lock>>(w, r, "ipc::spin_lock");
-    benchmark_lc<lc_wrapper<capo::spin_lock>>(w, r, "capo::spin_lock");
-    benchmark_lc<lc_wrapper<std::mutex>     >(w, r, "std::mutex");
-    // benchmark_lc<std::shared_mutex          >(w, r, "std::shared_mutex");
-}
-
-} // internal-linkage
-
-//TEST(Thread, rw_lock) {
-//    for (int i = 1; i <= ThreadMax; ++i) test_lock_performance(i, 0);
-//    for (int i = 1; i <= ThreadMax; ++i) test_lock_performance(1, i);
-//    for (int i = 2; i <= ThreadMax; ++i) test_lock_performance(i, i);
-//}
-
-#if 0 // disable ipc::tls
-TEST(Thread, tls_main_thread) {
-    ipc::tls::pointer<int> p;
-    EXPECT_FALSE(p);
-    EXPECT_NE(p.create(123), nullptr);
-    EXPECT_EQ(*p, 123);
-}
-
-namespace {
-
-struct Foo {
-    std::atomic<int> * px_;
-    Foo(std::atomic<int> * px) : px_(px) {}
-    ~Foo() {
-        px_->fetch_add(1, std::memory_order_relaxed);
-    }
-};
-
-} // namespace
-
-TEST(Thread, tls_create_once) {
-    std::atomic<int> x { 0 };
-    Foo { &x };
-    EXPECT_EQ(x, 1);
-    {
-        ipc::tls::pointer<Foo> foo;
-        EXPECT_NE(foo.create(&x), nullptr);
-        EXPECT_EQ(x, 1);
-
-        std::thread {[&foo, &x] {
-            auto foo1 = foo.create_once(&x);
-            auto foo2 = foo.create_once(&x);
-            EXPECT_EQ(foo1, foo2);
-        }}.join();
-        EXPECT_EQ(x, 2);
-    }
-    EXPECT_EQ(x, 3);
-}
-
-TEST(Thread, tls_multi_thread) {
-    std::atomic<int> x { 0 };
-    {
-        ipc::tls::pointer<Foo> foo; // no create
-        EXPECT_EQ(x, 0);
-
-        ipc_ut::thread_pool pool { 10 };
-        for (int i = 0; i < 1000; ++i) {
-          pool << [&foo, &x] {
-            // foo.create_once(&x);
-            std::this_thread::sleep_for(std::chrono::milliseconds(1));
-          };
-        }
-        pool.wait_for_done();
-        EXPECT_EQ(x, 0); // thread_pool hasn't destructed.
-    }
-    // EXPECT_EQ(x, 10);
-}
-
-namespace {
-
-template <typename Tls, typename T>
-void benchmark_tls(char const * message) {
-    ipc_ut::thread_pool pool { static_cast<std::size_t>(ThreadMax) };
-    ipc_ut::test_stopwatch sw;
-    pool.wait_for_started();
-
-    for (int k = 0; k < ThreadMax; ++k) {
-        pool << [&sw] {
-            sw.start();
-            for (int i = 0; i < LoopCount * 10; ++i) {
-                *Tls::template get<T>() = i;
-            }
-        };
-    }
-
-    pool.wait_for_done();
-    sw.print_elapsed(ThreadMax, LoopCount * 10, message);
-}
-
-struct ipc_tls {
-    template <typename T>
-    static T * get() {
-        static ipc::tls::pointer<T> p;
-        return p.create_once();
-    }
-};
-
-struct std_tls {
-    template <typename T>
-    static T * get() {
-        thread_local T p;
-        return &p;
-    }
-};
-
-struct Str {
-    std::string str_;
-
-    Str & operator=(int i) {
-        str_ = std::to_string(i);
-        return *this;
-    }
-};
-
-} // internal-linkage
-
-TEST(Thread, tls_benchmark) {
-    benchmark_tls<std_tls, int>("std_tls: int");
-    benchmark_tls<ipc_tls, int>("ipc_tls: int");
-    benchmark_tls<std_tls, Str>("std_tls: Str");
-    benchmark_tls<ipc_tls, Str>("ipc_tls: Str");
-}
-#endif
\ No newline at end of file
diff --git a/test/test_util.h b/test/test_util.h
new file mode 100644
index 00000000..c78d9190
--- /dev/null
+++ b/test/test_util.h
@@ -0,0 +1,90 @@
+
+#pragma once
+
+#include "libimp/detect_plat.h"
+#ifndef LIBIMP_OS_WIN
+# include <sys/wait.h>
+# include <unistd.h>
+#else
+# include <Windows.h>
+# include <process.h>
+# define pid_t uintptr_t
+#endif
+
+#include <condition_variable>
+#include <mutex>
+
+namespace test {
+
+template <typename Fn>
+pid_t subproc(Fn &&fn) {
+#ifndef LIBIMP_OS_WIN
+  pid_t pid = fork();
+  if (pid == -1) {
+    return pid;
+  }
+  if (!pid) {
+    // Unhook doctest from the subprocess.
+    // Otherwise, we would see a test-failure printout after the crash.
+    signal(SIGABRT, SIG_DFL);
+    signal(SIGSEGV, SIG_DFL);
+    fn();
+    exit(0);
+  }
+  return pid;
+#else
+  auto runner = [](void* pparam) {
+    auto fn = reinterpret_cast<std::decay_t<Fn> *>(pparam);
+    (*fn)();
+  };
+  return _beginthread(runner, 0, (void *)&fn);
+#endif
+}
+
+inline void join_subproc(pid_t pid) {
+  if (pid == -1) return;
+#ifndef LIBIMP_OS_WIN
+  int ret_code;
+  waitpid(pid, &ret_code, 0);
+#else
+  HANDLE hThread = reinterpret_cast<HANDLE>(pid);
+  WaitForSingleObject(hThread, INFINITE);
+  CloseHandle(hThread);
+#endif
+}
+
+/// \brief A simple latch implementation.
+class latch {
+public:
+  explicit latch(int count) : count_(count) {}
+
+  void count_down() {
+    std::unique_lock<std::mutex> lock(mutex_);
+    if (count_ > 0) {
+      --count_;
+      if (count_ == 0) {
+        cv_.notify_all();
+      }
+    }
+  }
+
+  void wait() {
+    std::unique_lock<std::mutex> lock(mutex_);
+    cv_.wait(lock, [&] { return count_ == 0; });
+  }
+
+  void arrive_and_wait() {
+    count_down();
+    wait();
+  }
+
+private:
+  std::mutex mutex_;
+  std::condition_variable cv_;
+  int count_;
+};
+
+} // namespace test
+
+#define REQUIRE_EXIT(...) \
+  test::join_subproc(test::subproc([&]() __VA_ARGS__))
diff --git a/test/test_waiter.cpp b/test/test_waiter.cpp
deleted file mode 100755
index 727cca0c..00000000
--- a/test/test_waiter.cpp
+++ /dev/null
@@ -1,68 +0,0 @@
-#include <thread>
-#include <iostream>
-
-#include "libipc/waiter.h"
-#include "test.h"
-
-namespace {
-
-TEST(Waiter, broadcast) {
-    for (int i = 0; i < 10; ++i) {
-        ipc::detail::waiter waiter;
-        std::thread ts[10];
-
-        int k = 0;
-        for (auto& t : ts) {
-            t = std::thread([&k] {
-                ipc::detail::waiter waiter {"test-ipc-waiter"};
-                EXPECT_TRUE(waiter.valid());
-                for (int i = 0; i < 9; ++i) {
-                    while (!waiter.wait_if([&k, &i] { return k == i; })) ;
-                }
-            });
-        }
-
-        EXPECT_TRUE(waiter.open("test-ipc-waiter"));
-        std::cout << "waiting for broadcast...\n";
-        for (k = 1; k < 10; ++k) {
-            std::cout << "broadcast: " << k << "\n";
-            ASSERT_TRUE(waiter.broadcast());
-            std::this_thread::sleep_for(std::chrono::milliseconds(100));
-        }
-        for (auto& t : ts) t.join();
-        std::cout << "quit... " << i << "\n";
-    }
-}
-
-TEST(Waiter, quit_waiting) {
-    ipc::detail::waiter waiter;
-    EXPECT_TRUE(waiter.open("test-ipc-waiter"));
-
-    std::thread t1 {
-        [&waiter] {
-            EXPECT_TRUE(waiter.wait_if([] { return true; }));
-        }
-    };
-
-    bool quit = false;
-    std::thread t2 {
-        [&quit] {
-            ipc::detail::waiter waiter {"test-ipc-waiter"};
-            EXPECT_TRUE(waiter.wait_if([&quit] { return !quit; }));
-        }
-    };
-
-    std::this_thread::sleep_for(std::chrono::milliseconds(100));
-    EXPECT_TRUE(waiter.quit_waiting());
-    t1.join();
-    ASSERT_TRUE(t2.joinable());
-
-    EXPECT_TRUE(waiter.open("test-ipc-waiter"));
-    std::cout << "nofify quit...\n";
-    quit = true;
-    EXPECT_TRUE(waiter.notify());
-    t2.join();
-    std::cout << "quit... \n";
-}
-
-} // internal-linkage
diff --git a/test/thread_pool.h b/test/thread_pool.h
deleted file mode 100755
index 03b7e8f6..00000000
--- a/test/thread_pool.h
+++ /dev/null
@@ -1,123 +0,0 @@
-#pragma once
-
-#include <thread>             // std::thread
-#include <mutex>              // std::mutex
-#include <condition_variable> // std::condition_variable
-#include <deque>              // std::deque
-#include <functional>         // std::function
-#include <utility>            // std::forward, std::move
-#include <cstddef>            // std::size_t
-#include <cassert>            // assert
-
-#include "capo/scope_guard.hpp"
-
-namespace ipc_ut {
-
-class thread_pool final {
-
-  std::deque<std::thread> workers_;
-  std::deque<std::function<void()>> jobs_;
-
-  std::mutex lock_;
-  std::condition_variable cv_jobs_;
-  std::condition_variable cv_empty_;
-
-  std::size_t waiting_cnt_ = 0;
-  bool quit_ = false;
-
-  static void proc(thread_pool * pool) {
-    assert(pool != nullptr);
-    std::function<void()> job;
-    for (;;) {
-      {
-        std::unique_lock<std::mutex> guard { pool->lock_ };
-        if (pool->quit_) return;
-        if (pool->jobs_.empty()) {
-          pool->waiting_cnt_ += 1;
-          CAPO_SCOPE_GUARD_ = [pool] {
-              pool->waiting_cnt_ -= 1;
-          };
-
-          if (pool->waiting_cnt_ == pool->workers_.size()) {
-            pool->cv_empty_.notify_all();
-          }
-          assert(pool->waiting_cnt_ <= pool->workers_.size());
-          do {
-            pool->cv_jobs_.wait(guard);
-            if (pool->quit_) return;
-          } while (pool->jobs_.empty());
-        }
-        assert(!pool->jobs_.empty());
-        job = std::move(pool->jobs_.front());
-        pool->jobs_.pop_front();
-      }
-      if (job) job();
-    }
-  }
-
-public:
-  thread_pool() = default;
-
-  ~thread_pool() {
-    {
-      std::lock_guard<std::mutex> guard { lock_ };
-      static_cast<void>(guard);
-      quit_ = true;
-    }
-    cv_jobs_.notify_all();
-    cv_empty_.notify_all();
-    for (auto & trd : workers_) trd.join();
-  }
-
-  explicit thread_pool(std::size_t n) : thread_pool() {
-    start(n);
-  }
-
-  void start(std::size_t n) {
-    std::unique_lock<std::mutex> guard { lock_ };
-    if (n <= workers_.size()) return;
-    for (std::size_t i = workers_.size(); i < n; ++i) {
-      workers_.push_back(std::thread { &thread_pool::proc, this });
-    }
-  }
-
-  std::size_t size() const noexcept {
-    return workers_.size();
-  }
-
-  std::size_t jobs_size() const noexcept {
-    return jobs_.size();
-  }
-
-  void wait_for_started() {
-    std::unique_lock<std::mutex> guard { lock_ };
-    if (quit_) return;
-    while (!workers_.empty() && (waiting_cnt_ != workers_.size())) {
-      cv_empty_.wait(guard);
-      if (quit_) return;
-    }
-  }
-
-  void wait_for_done() {
-    std::unique_lock<std::mutex> guard { lock_ };
-    if (quit_) return;
-    while (!jobs_.empty() || (waiting_cnt_ != workers_.size())) {
-      assert(waiting_cnt_ <= workers_.size());
-      cv_empty_.wait(guard);
-      if (quit_) return;
-    }
-  }
-
-  template <typename F>
-  thread_pool & operator<<(F && job) {
-    {
-      std::lock_guard<std::mutex> guard { lock_ };
-      static_cast<void>(guard);
-      jobs_.emplace_back(std::forward<F>(job));
-    }
-    cv_jobs_.notify_one();
-    return *this;
-  }
-};
-
-} // namespace ipc_ut
\ No newline at end of file
diff --git a/test/xmake.lua b/test/xmake.lua
new file mode 100644
index 00000000..44264140
--- /dev/null
+++ b/test/xmake.lua
@@ -0,0 +1,25 @@
+add_requires("gtest 1.15.*", {configs = {main = true}})
+
+target("test-ipc")
+  set_kind("binary")
+  add_deps("ipc")
+  add_packages("gtest")
+  add_links("gtest_main")
+  if is_os("windows") then
+    add_ldflags("/subsystem:console")
+  end
+  on_config(config_target_compilation)
+  on_config(function (target)
+    if target:has_tool("cxx", "cl") then
+      target:add("cxflags", "/wd4723")
+    else
+      target:add("links", "gtest_main")
+      target:add("cxflags", "-Wno-missing-field-initializers"
+                          , "-Wno-unused-variable"
+                          , "-Wno-unused-function")
+    end
+  end)
+  add_includedirs("$(projectdir)/include"
+                , "$(projectdir)/src"
+                , "$(projectdir)/test")
+  add_files("$(projectdir)/test/**.cpp")
diff --git a/xmake.lua b/xmake.lua
new file mode 100644
index 00000000..18f522a0
--- /dev/null
+++ b/xmake.lua
@@ -0,0 +1,63 @@
+set_project("cpp-ipc")
+set_version("2.0.0", {build = "%Y%m%d%H%M"})
+
+-- Build all of libipc's own tests.
+option("build_tests") set_default(false)
+-- Build all of libipc's own demos.
+option("build_demos") set_default(false)
+-- Build all of libipc's own benchmark tests.
+option("build_benchmarks") set_default(false)
+-- Build shared libraries (DLLs).
+option("build_shared_lib") set_default(false)
+-- Set to ON to build with static CRT on Windows (/MT).
+option("use_static_crt") set_default(false)
+-- Build with unit test coverage.
+option("use_codecov") set_default(false)
+option_end()
+
+add_rules("mode.debug", "mode.release")
+set_languages("cxx17")
+if is_mode("debug") then
+  if has_config("use_static_crt") then
+    set_runtimes("MTd")
+  else
+    set_runtimes("MDd")
+  end
+else
+  if has_config("use_static_crt") then
+    set_runtimes("MT")
+  else
+    set_runtimes("MD")
+  end
+end
+
+function config_target_compilation(target)
+  if target:has_tool("cxx", "cl") then
+    target:add("defines", "UNICODE", "_UNICODE")
+    if is_mode("debug") then
+      target:add("cxflags", "/Zi")
+    end
+  else
+    target:add("cxflags", "-fPIC", "-Wno-attributes")
+    if has_config("use_codecov") then
+      target:add("cxflags", "--coverage")
+      target:add("ldflags", "--coverage")
+      target:add("syslinks", "gcov")
+    end
+    if is_mode("debug") then
+      target:add("cxflags", "-rdynamic -fsanitize=address")
+      target:add("ldflags", "-fsanitize=address")
+    end
+  end
+end
+
+includes("src")
+if has_config("build_tests") then
+  includes("test")
+end
+if has_config("build_demos") then
+  includes("demo")
+end
+if has_config("build_benchmarks") then
+  includes("benchmark")
+end