-
Notifications
You must be signed in to change notification settings - Fork 13.1k
/
Copy pathutility
1619 lines (1391 loc) · 48.5 KB
/
utility
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// -*- C++ -*-
//===-------------------------- utility -----------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_UTILITY
#define _LIBCPP_UTILITY
/*
utility synopsis
#include <initializer_list>
namespace std
{
template <class T>
void
swap(T& a, T& b);
namespace rel_ops
{
template<class T> bool operator!=(const T&, const T&);
template<class T> bool operator> (const T&, const T&);
template<class T> bool operator<=(const T&, const T&);
template<class T> bool operator>=(const T&, const T&);
}
template<class T>
void
swap(T& a, T& b) noexcept(is_nothrow_move_constructible<T>::value &&
is_nothrow_move_assignable<T>::value);
template <class T, size_t N>
void
swap(T (&a)[N], T (&b)[N]) noexcept(noexcept(swap(*a, *b)));
template <class T> T&& forward(typename remove_reference<T>::type& t) noexcept; // constexpr in C++14
template <class T> T&& forward(typename remove_reference<T>::type&& t) noexcept; // constexpr in C++14
template <class T> typename remove_reference<T>::type&& move(T&&) noexcept; // constexpr in C++14
template <class T>
typename conditional
<
!is_nothrow_move_constructible<T>::value && is_copy_constructible<T>::value,
const T&,
T&&
>::type
move_if_noexcept(T& x) noexcept; // constexpr in C++14
template <class T> constexpr add_const_t<T>& as_const(T& t) noexcept; // C++17
template <class T> void as_const(const T&&) = delete; // C++17
template <class T> typename add_rvalue_reference<T>::type declval() noexcept;
template <class T1, class T2>
struct pair
{
typedef T1 first_type;
typedef T2 second_type;
T1 first;
T2 second;
pair(const pair&) = default;
pair(pair&&) = default;
explicit(see-below) constexpr pair();
explicit(see-below) pair(const T1& x, const T2& y); // constexpr in C++14
template <class U, class V> explicit(see-below) pair(U&& x, V&& y); // constexpr in C++14
template <class U, class V> explicit(see-below) pair(const pair<U, V>& p); // constexpr in C++14
template <class U, class V> explicit(see-below) pair(pair<U, V>&& p); // constexpr in C++14
template <class... Args1, class... Args2>
pair(piecewise_construct_t, tuple<Args1...> first_args,
tuple<Args2...> second_args);
template <class U, class V> pair& operator=(const pair<U, V>& p);
pair& operator=(pair&& p) noexcept(is_nothrow_move_assignable<T1>::value &&
is_nothrow_move_assignable<T2>::value);
template <class U, class V> pair& operator=(pair<U, V>&& p);
void swap(pair& p) noexcept(is_nothrow_swappable_v<T1> &&
is_nothrow_swappable_v<T2>);
};
template <class T1, class T2> bool operator==(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14
template <class T1, class T2> bool operator!=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14
template <class T1, class T2> bool operator< (const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14
template <class T1, class T2> bool operator> (const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14
template <class T1, class T2> bool operator>=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14
template <class T1, class T2> bool operator<=(const pair<T1,T2>&, const pair<T1,T2>&); // constexpr in C++14
template <class T1, class T2> pair<V1, V2> make_pair(T1&&, T2&&); // constexpr in C++14
template <class T1, class T2>
void
swap(pair<T1, T2>& x, pair<T1, T2>& y) noexcept(noexcept(x.swap(y)));
struct piecewise_construct_t { explicit piecewise_construct_t() = default; };
inline constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t();
template <class T> struct tuple_size;
template <size_t I, class T> struct tuple_element;
template <class T1, class T2> struct tuple_size<pair<T1, T2> >;
template <class T1, class T2> struct tuple_element<0, pair<T1, T2> >;
template <class T1, class T2> struct tuple_element<1, pair<T1, T2> >;
template<size_t I, class T1, class T2>
typename tuple_element<I, pair<T1, T2> >::type&
get(pair<T1, T2>&) noexcept; // constexpr in C++14
template<size_t I, class T1, class T2>
const typename tuple_element<I, pair<T1, T2> >::type&
get(const pair<T1, T2>&) noexcept; // constexpr in C++14
template<size_t I, class T1, class T2>
typename tuple_element<I, pair<T1, T2> >::type&&
get(pair<T1, T2>&&) noexcept; // constexpr in C++14
template<size_t I, class T1, class T2>
const typename tuple_element<I, pair<T1, T2> >::type&&
get(const pair<T1, T2>&&) noexcept; // constexpr in C++14
template<class T1, class T2>
constexpr T1& get(pair<T1, T2>&) noexcept; // C++14
template<class T1, class T2>
constexpr const T1& get(const pair<T1, T2>&) noexcept; // C++14
template<class T1, class T2>
constexpr T1&& get(pair<T1, T2>&&) noexcept; // C++14
template<class T1, class T2>
constexpr const T1&& get(const pair<T1, T2>&&) noexcept; // C++14
template<class T1, class T2>
constexpr T1& get(pair<T2, T1>&) noexcept; // C++14
template<class T1, class T2>
constexpr const T1& get(const pair<T2, T1>&) noexcept; // C++14
template<class T1, class T2>
constexpr T1&& get(pair<T2, T1>&&) noexcept; // C++14
template<class T1, class T2>
constexpr const T1&& get(const pair<T2, T1>&&) noexcept; // C++14
// C++14
template<class T, T... I>
struct integer_sequence
{
typedef T value_type;
static constexpr size_t size() noexcept;
};
template<size_t... I>
using index_sequence = integer_sequence<size_t, I...>;
template<class T, T N>
using make_integer_sequence = integer_sequence<T, 0, 1, ..., N-1>;
template<size_t N>
using make_index_sequence = make_integer_sequence<size_t, N>;
template<class... T>
using index_sequence_for = make_index_sequence<sizeof...(T)>;
template<class T, class U=T>
T exchange(T& obj, U&& new_value);
// 20.2.7, in-place construction // C++17
struct in_place_t {
explicit in_place_t() = default;
};
inline constexpr in_place_t in_place{};
template <class T>
struct in_place_type_t {
explicit in_place_type_t() = default;
};
template <class T>
inline constexpr in_place_type_t<T> in_place_type{};
template <size_t I>
struct in_place_index_t {
explicit in_place_index_t() = default;
};
template <size_t I>
inline constexpr in_place_index_t<I> in_place_index{};
} // std
*/
#include <__config>
#include <__tuple>
#include <type_traits>
#include <initializer_list>
#include <cstddef>
#include <cstring>
#include <cstdint>
#include <version>
#include <__debug>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
namespace rel_ops
{
template<class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
bool
operator!=(const _Tp& __x, const _Tp& __y)
{
return !(__x == __y);
}
template<class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
bool
operator> (const _Tp& __x, const _Tp& __y)
{
return __y < __x;
}
template<class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
bool
operator<=(const _Tp& __x, const _Tp& __y)
{
return !(__y < __x);
}
template<class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
bool
operator>=(const _Tp& __x, const _Tp& __y)
{
return !(__x < __y);
}
} // rel_ops
// swap_ranges is defined in <type_traits>`
// swap is defined in <type_traits>
// move_if_noexcept
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
#ifndef _LIBCPP_CXX03_LANG
typename conditional
<
!is_nothrow_move_constructible<_Tp>::value && is_copy_constructible<_Tp>::value,
const _Tp&,
_Tp&&
>::type
#else // _LIBCPP_CXX03_LANG
const _Tp&
#endif
move_if_noexcept(_Tp& __x) _NOEXCEPT
{
return _VSTD::move(__x);
}
#if _LIBCPP_STD_VER > 14
template <class _Tp> constexpr add_const_t<_Tp>& as_const(_Tp& __t) noexcept { return __t; }
template <class _Tp> void as_const(const _Tp&&) = delete;
#endif
struct _LIBCPP_TEMPLATE_VIS piecewise_construct_t { explicit piecewise_construct_t() = default; };
#if defined(_LIBCPP_CXX03_LANG) || defined(_LIBCPP_BUILDING_LIBRARY)
extern _LIBCPP_EXPORTED_FROM_ABI const piecewise_construct_t piecewise_construct;// = piecewise_construct_t();
#else
/* _LIBCPP_INLINE_VAR */ constexpr piecewise_construct_t piecewise_construct = piecewise_construct_t();
#endif
#if defined(_LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR)
template <class, class>
struct __non_trivially_copyable_base {
_LIBCPP_CONSTEXPR _LIBCPP_INLINE_VISIBILITY
__non_trivially_copyable_base() _NOEXCEPT {}
_LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
__non_trivially_copyable_base(__non_trivially_copyable_base const&) _NOEXCEPT {}
};
#endif
template <class _T1, class _T2>
struct _LIBCPP_TEMPLATE_VIS pair
#if defined(_LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR)
: private __non_trivially_copyable_base<_T1, _T2>
#endif
{
typedef _T1 first_type;
typedef _T2 second_type;
_T1 first;
_T2 second;
#if !defined(_LIBCPP_CXX03_LANG)
pair(pair const&) = default;
pair(pair&&) = default;
#else
// Use the implicitly declared copy constructor in C++03
#endif
#ifdef _LIBCPP_CXX03_LANG
_LIBCPP_INLINE_VISIBILITY
pair() : first(), second() {}
_LIBCPP_INLINE_VISIBILITY
pair(_T1 const& __t1, _T2 const& __t2) : first(__t1), second(__t2) {}
template <class _U1, class _U2>
_LIBCPP_INLINE_VISIBILITY
pair(const pair<_U1, _U2>& __p) : first(__p.first), second(__p.second) {}
_LIBCPP_INLINE_VISIBILITY
pair& operator=(pair const& __p) {
first = __p.first;
second = __p.second;
return *this;
}
#else
template <bool _Val>
using _EnableB _LIBCPP_NODEBUG_TYPE = typename enable_if<_Val, bool>::type;
struct _CheckArgs {
template <int&...>
static constexpr bool __enable_explicit_default() {
return is_default_constructible<_T1>::value
&& is_default_constructible<_T2>::value
&& !__enable_implicit_default<>();
}
template <int&...>
static constexpr bool __enable_implicit_default() {
return __is_implicitly_default_constructible<_T1>::value
&& __is_implicitly_default_constructible<_T2>::value;
}
template <class _U1, class _U2>
static constexpr bool __enable_explicit() {
return is_constructible<first_type, _U1>::value
&& is_constructible<second_type, _U2>::value
&& (!is_convertible<_U1, first_type>::value
|| !is_convertible<_U2, second_type>::value);
}
template <class _U1, class _U2>
static constexpr bool __enable_implicit() {
return is_constructible<first_type, _U1>::value
&& is_constructible<second_type, _U2>::value
&& is_convertible<_U1, first_type>::value
&& is_convertible<_U2, second_type>::value;
}
};
template <bool _MaybeEnable>
using _CheckArgsDep _LIBCPP_NODEBUG_TYPE = typename conditional<
_MaybeEnable, _CheckArgs, __check_tuple_constructor_fail>::type;
struct _CheckTupleLikeConstructor {
template <class _Tuple>
static constexpr bool __enable_implicit() {
return __tuple_convertible<_Tuple, pair>::value;
}
template <class _Tuple>
static constexpr bool __enable_explicit() {
return __tuple_constructible<_Tuple, pair>::value
&& !__tuple_convertible<_Tuple, pair>::value;
}
template <class _Tuple>
static constexpr bool __enable_assign() {
return __tuple_assignable<_Tuple, pair>::value;
}
};
template <class _Tuple>
using _CheckTLC _LIBCPP_NODEBUG_TYPE = typename conditional<
__tuple_like_with_size<_Tuple, 2>::value
&& !is_same<typename decay<_Tuple>::type, pair>::value,
_CheckTupleLikeConstructor,
__check_tuple_constructor_fail
>::type;
template<bool _Dummy = true, _EnableB<
_CheckArgsDep<_Dummy>::__enable_explicit_default()
> = false>
explicit _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
pair() _NOEXCEPT_(is_nothrow_default_constructible<first_type>::value &&
is_nothrow_default_constructible<second_type>::value)
: first(), second() {}
template<bool _Dummy = true, _EnableB<
_CheckArgsDep<_Dummy>::__enable_implicit_default()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
pair() _NOEXCEPT_(is_nothrow_default_constructible<first_type>::value &&
is_nothrow_default_constructible<second_type>::value)
: first(), second() {}
template <bool _Dummy = true, _EnableB<
_CheckArgsDep<_Dummy>::template __enable_explicit<_T1 const&, _T2 const&>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit pair(_T1 const& __t1, _T2 const& __t2)
_NOEXCEPT_(is_nothrow_copy_constructible<first_type>::value &&
is_nothrow_copy_constructible<second_type>::value)
: first(__t1), second(__t2) {}
template<bool _Dummy = true, _EnableB<
_CheckArgsDep<_Dummy>::template __enable_implicit<_T1 const&, _T2 const&>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
pair(_T1 const& __t1, _T2 const& __t2)
_NOEXCEPT_(is_nothrow_copy_constructible<first_type>::value &&
is_nothrow_copy_constructible<second_type>::value)
: first(__t1), second(__t2) {}
template<class _U1, class _U2, _EnableB<
_CheckArgs::template __enable_explicit<_U1, _U2>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit pair(_U1&& __u1, _U2&& __u2)
_NOEXCEPT_((is_nothrow_constructible<first_type, _U1>::value &&
is_nothrow_constructible<second_type, _U2>::value))
: first(_VSTD::forward<_U1>(__u1)), second(_VSTD::forward<_U2>(__u2)) {}
template<class _U1, class _U2, _EnableB<
_CheckArgs::template __enable_implicit<_U1, _U2>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
pair(_U1&& __u1, _U2&& __u2)
_NOEXCEPT_((is_nothrow_constructible<first_type, _U1>::value &&
is_nothrow_constructible<second_type, _U2>::value))
: first(_VSTD::forward<_U1>(__u1)), second(_VSTD::forward<_U2>(__u2)) {}
template<class _U1, class _U2, _EnableB<
_CheckArgs::template __enable_explicit<_U1 const&, _U2 const&>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit pair(pair<_U1, _U2> const& __p)
_NOEXCEPT_((is_nothrow_constructible<first_type, _U1 const&>::value &&
is_nothrow_constructible<second_type, _U2 const&>::value))
: first(__p.first), second(__p.second) {}
template<class _U1, class _U2, _EnableB<
_CheckArgs::template __enable_implicit<_U1 const&, _U2 const&>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
pair(pair<_U1, _U2> const& __p)
_NOEXCEPT_((is_nothrow_constructible<first_type, _U1 const&>::value &&
is_nothrow_constructible<second_type, _U2 const&>::value))
: first(__p.first), second(__p.second) {}
template<class _U1, class _U2, _EnableB<
_CheckArgs::template __enable_explicit<_U1, _U2>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit pair(pair<_U1, _U2>&&__p)
_NOEXCEPT_((is_nothrow_constructible<first_type, _U1&&>::value &&
is_nothrow_constructible<second_type, _U2&&>::value))
: first(_VSTD::forward<_U1>(__p.first)), second(_VSTD::forward<_U2>(__p.second)) {}
template<class _U1, class _U2, _EnableB<
_CheckArgs::template __enable_implicit<_U1, _U2>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
pair(pair<_U1, _U2>&& __p)
_NOEXCEPT_((is_nothrow_constructible<first_type, _U1&&>::value &&
is_nothrow_constructible<second_type, _U2&&>::value))
: first(_VSTD::forward<_U1>(__p.first)), second(_VSTD::forward<_U2>(__p.second)) {}
template<class _Tuple, _EnableB<
_CheckTLC<_Tuple>::template __enable_explicit<_Tuple>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
explicit pair(_Tuple&& __p)
: first(_VSTD::get<0>(_VSTD::forward<_Tuple>(__p))),
second(_VSTD::get<1>(_VSTD::forward<_Tuple>(__p))) {}
template<class _Tuple, _EnableB<
_CheckTLC<_Tuple>::template __enable_implicit<_Tuple>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
pair(_Tuple&& __p)
: first(_VSTD::get<0>(_VSTD::forward<_Tuple>(__p))),
second(_VSTD::get<1>(_VSTD::forward<_Tuple>(__p))) {}
template <class... _Args1, class... _Args2>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
pair(piecewise_construct_t __pc,
tuple<_Args1...> __first_args, tuple<_Args2...> __second_args)
_NOEXCEPT_((is_nothrow_constructible<first_type, _Args1...>::value &&
is_nothrow_constructible<second_type, _Args2...>::value))
: pair(__pc, __first_args, __second_args,
typename __make_tuple_indices<sizeof...(_Args1)>::type(),
typename __make_tuple_indices<sizeof...(_Args2) >::type()) {}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
pair& operator=(typename conditional<
is_copy_assignable<first_type>::value &&
is_copy_assignable<second_type>::value,
pair, __nat>::type const& __p)
_NOEXCEPT_(is_nothrow_copy_assignable<first_type>::value &&
is_nothrow_copy_assignable<second_type>::value)
{
first = __p.first;
second = __p.second;
return *this;
}
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
pair& operator=(typename conditional<
is_move_assignable<first_type>::value &&
is_move_assignable<second_type>::value,
pair, __nat>::type&& __p)
_NOEXCEPT_(is_nothrow_move_assignable<first_type>::value &&
is_nothrow_move_assignable<second_type>::value)
{
first = _VSTD::forward<first_type>(__p.first);
second = _VSTD::forward<second_type>(__p.second);
return *this;
}
template <class _Tuple, _EnableB<
_CheckTLC<_Tuple>::template __enable_assign<_Tuple>()
> = false>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
pair& operator=(_Tuple&& __p) {
first = _VSTD::get<0>(_VSTD::forward<_Tuple>(__p));
second = _VSTD::get<1>(_VSTD::forward<_Tuple>(__p));
return *this;
}
#endif
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
void
swap(pair& __p) _NOEXCEPT_(__is_nothrow_swappable<first_type>::value &&
__is_nothrow_swappable<second_type>::value)
{
using _VSTD::swap;
swap(first, __p.first);
swap(second, __p.second);
}
private:
#ifndef _LIBCPP_CXX03_LANG
template <class... _Args1, class... _Args2, size_t... _I1, size_t... _I2>
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
pair(piecewise_construct_t,
tuple<_Args1...>& __first_args, tuple<_Args2...>& __second_args,
__tuple_indices<_I1...>, __tuple_indices<_I2...>);
#endif
};
#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
template<class _T1, class _T2>
pair(_T1, _T2) -> pair<_T1, _T2>;
#endif // _LIBCPP_HAS_NO_DEDUCTION_GUIDES
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator==(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return __x.first == __y.first && __x.second == __y.second;
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator!=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return !(__x == __y);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator< (const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return __x.first < __y.first || (!(__y.first < __x.first) && __x.second < __y.second);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator> (const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return __y < __x;
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator>=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return !(__x < __y);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
bool
operator<=(const pair<_T1,_T2>& __x, const pair<_T1,_T2>& __y)
{
return !(__y < __x);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
typename enable_if
<
__is_swappable<_T1>::value &&
__is_swappable<_T2>::value,
void
>::type
swap(pair<_T1, _T2>& __x, pair<_T1, _T2>& __y)
_NOEXCEPT_((__is_nothrow_swappable<_T1>::value &&
__is_nothrow_swappable<_T2>::value))
{
__x.swap(__y);
}
template <class _Tp>
struct __unwrap_reference { typedef _LIBCPP_NODEBUG_TYPE _Tp type; };
template <class _Tp>
struct __unwrap_reference<reference_wrapper<_Tp> > { typedef _LIBCPP_NODEBUG_TYPE _Tp& type; };
#if _LIBCPP_STD_VER > 17
template <class _Tp>
struct unwrap_reference : __unwrap_reference<_Tp> { };
template <class _Tp>
struct unwrap_ref_decay : unwrap_reference<typename decay<_Tp>::type> { };
#endif // > C++17
template <class _Tp>
struct __unwrap_ref_decay
#if _LIBCPP_STD_VER > 17
: unwrap_ref_decay<_Tp>
#else
: __unwrap_reference<typename decay<_Tp>::type>
#endif
{ };
#ifndef _LIBCPP_CXX03_LANG
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
pair<typename __unwrap_ref_decay<_T1>::type, typename __unwrap_ref_decay<_T2>::type>
make_pair(_T1&& __t1, _T2&& __t2)
{
return pair<typename __unwrap_ref_decay<_T1>::type, typename __unwrap_ref_decay<_T2>::type>
(_VSTD::forward<_T1>(__t1), _VSTD::forward<_T2>(__t2));
}
#else // _LIBCPP_CXX03_LANG
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
pair<_T1,_T2>
make_pair(_T1 __x, _T2 __y)
{
return pair<_T1, _T2>(__x, __y);
}
#endif // _LIBCPP_CXX03_LANG
template <class _T1, class _T2>
struct _LIBCPP_TEMPLATE_VIS tuple_size<pair<_T1, _T2> >
: public integral_constant<size_t, 2> {};
template <size_t _Ip, class _T1, class _T2>
struct _LIBCPP_TEMPLATE_VIS tuple_element<_Ip, pair<_T1, _T2> >
{
static_assert(_Ip < 2, "Index out of bounds in std::tuple_element<std::pair<T1, T2>>");
};
template <class _T1, class _T2>
struct _LIBCPP_TEMPLATE_VIS tuple_element<0, pair<_T1, _T2> >
{
typedef _LIBCPP_NODEBUG_TYPE _T1 type;
};
template <class _T1, class _T2>
struct _LIBCPP_TEMPLATE_VIS tuple_element<1, pair<_T1, _T2> >
{
typedef _LIBCPP_NODEBUG_TYPE _T2 type;
};
template <size_t _Ip> struct __get_pair;
template <>
struct __get_pair<0>
{
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_T1&
get(pair<_T1, _T2>& __p) _NOEXCEPT {return __p.first;}
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const _T1&
get(const pair<_T1, _T2>& __p) _NOEXCEPT {return __p.first;}
#ifndef _LIBCPP_CXX03_LANG
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_T1&&
get(pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<_T1>(__p.first);}
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const _T1&&
get(const pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<const _T1>(__p.first);}
#endif // _LIBCPP_CXX03_LANG
};
template <>
struct __get_pair<1>
{
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_T2&
get(pair<_T1, _T2>& __p) _NOEXCEPT {return __p.second;}
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const _T2&
get(const pair<_T1, _T2>& __p) _NOEXCEPT {return __p.second;}
#ifndef _LIBCPP_CXX03_LANG
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
_T2&&
get(pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<_T2>(__p.second);}
template <class _T1, class _T2>
static
_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const _T2&&
get(const pair<_T1, _T2>&& __p) _NOEXCEPT {return _VSTD::forward<const _T2>(__p.second);}
#endif // _LIBCPP_CXX03_LANG
};
template <size_t _Ip, class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
typename tuple_element<_Ip, pair<_T1, _T2> >::type&
get(pair<_T1, _T2>& __p) _NOEXCEPT
{
return __get_pair<_Ip>::get(__p);
}
template <size_t _Ip, class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const typename tuple_element<_Ip, pair<_T1, _T2> >::type&
get(const pair<_T1, _T2>& __p) _NOEXCEPT
{
return __get_pair<_Ip>::get(__p);
}
#ifndef _LIBCPP_CXX03_LANG
template <size_t _Ip, class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
get(pair<_T1, _T2>&& __p) _NOEXCEPT
{
return __get_pair<_Ip>::get(_VSTD::move(__p));
}
template <size_t _Ip, class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
const typename tuple_element<_Ip, pair<_T1, _T2> >::type&&
get(const pair<_T1, _T2>&& __p) _NOEXCEPT
{
return __get_pair<_Ip>::get(_VSTD::move(__p));
}
#endif // _LIBCPP_CXX03_LANG
#if _LIBCPP_STD_VER > 11
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 & get(pair<_T1, _T2>& __p) _NOEXCEPT
{
return __get_pair<0>::get(__p);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 const & get(pair<_T1, _T2> const& __p) _NOEXCEPT
{
return __get_pair<0>::get(__p);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 && get(pair<_T1, _T2>&& __p) _NOEXCEPT
{
return __get_pair<0>::get(_VSTD::move(__p));
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 const && get(pair<_T1, _T2> const&& __p) _NOEXCEPT
{
return __get_pair<0>::get(_VSTD::move(__p));
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 & get(pair<_T2, _T1>& __p) _NOEXCEPT
{
return __get_pair<1>::get(__p);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 const & get(pair<_T2, _T1> const& __p) _NOEXCEPT
{
return __get_pair<1>::get(__p);
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 && get(pair<_T2, _T1>&& __p) _NOEXCEPT
{
return __get_pair<1>::get(_VSTD::move(__p));
}
template <class _T1, class _T2>
inline _LIBCPP_INLINE_VISIBILITY
constexpr _T1 const && get(pair<_T2, _T1> const&& __p) _NOEXCEPT
{
return __get_pair<1>::get(_VSTD::move(__p));
}
#endif
#if _LIBCPP_STD_VER > 11
template<class _Tp, _Tp... _Ip>
struct _LIBCPP_TEMPLATE_VIS integer_sequence
{
typedef _Tp value_type;
static_assert( is_integral<_Tp>::value,
"std::integer_sequence can only be instantiated with an integral type" );
static
_LIBCPP_INLINE_VISIBILITY
constexpr
size_t
size() noexcept { return sizeof...(_Ip); }
};
template<size_t... _Ip>
using index_sequence = integer_sequence<size_t, _Ip...>;
#if __has_builtin(__make_integer_seq) && !defined(_LIBCPP_TESTING_FALLBACK_MAKE_INTEGER_SEQUENCE)
template <class _Tp, _Tp _Ep>
using __make_integer_sequence _LIBCPP_NODEBUG_TYPE = __make_integer_seq<integer_sequence, _Tp, _Ep>;
#else
template<typename _Tp, _Tp _Np> using __make_integer_sequence_unchecked _LIBCPP_NODEBUG_TYPE =
typename __detail::__make<_Np>::type::template __convert<integer_sequence, _Tp>;
template <class _Tp, _Tp _Ep>
struct __make_integer_sequence_checked
{
static_assert(is_integral<_Tp>::value,
"std::make_integer_sequence can only be instantiated with an integral type" );
static_assert(0 <= _Ep, "std::make_integer_sequence must have a non-negative sequence length");
// Workaround GCC bug by preventing bad installations when 0 <= _Ep
// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68929
typedef _LIBCPP_NODEBUG_TYPE __make_integer_sequence_unchecked<_Tp, 0 <= _Ep ? _Ep : 0> type;
};
template <class _Tp, _Tp _Ep>
using __make_integer_sequence _LIBCPP_NODEBUG_TYPE = typename __make_integer_sequence_checked<_Tp, _Ep>::type;
#endif
template<class _Tp, _Tp _Np>
using make_integer_sequence = __make_integer_sequence<_Tp, _Np>;
template<size_t _Np>
using make_index_sequence = make_integer_sequence<size_t, _Np>;
template<class... _Tp>
using index_sequence_for = make_index_sequence<sizeof...(_Tp)>;
#endif // _LIBCPP_STD_VER > 11
#if _LIBCPP_STD_VER > 11
template<class _T1, class _T2 = _T1>
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
_T1 exchange(_T1& __obj, _T2 && __new_value)
{
_T1 __old_value = _VSTD::move(__obj);
__obj = _VSTD::forward<_T2>(__new_value);
return __old_value;
}
#endif // _LIBCPP_STD_VER > 11
#if _LIBCPP_STD_VER > 14
struct _LIBCPP_TYPE_VIS in_place_t {
explicit in_place_t() = default;
};
_LIBCPP_INLINE_VAR constexpr in_place_t in_place{};
template <class _Tp>
struct _LIBCPP_TEMPLATE_VIS in_place_type_t {
explicit in_place_type_t() = default;
};
template <class _Tp>
_LIBCPP_INLINE_VAR constexpr in_place_type_t<_Tp> in_place_type{};
template <size_t _Idx>
struct _LIBCPP_TYPE_VIS in_place_index_t {
explicit in_place_index_t() = default;
};
template <size_t _Idx>
_LIBCPP_INLINE_VAR constexpr in_place_index_t<_Idx> in_place_index{};
template <class _Tp> struct __is_inplace_type_imp : false_type {};
template <class _Tp> struct __is_inplace_type_imp<in_place_type_t<_Tp>> : true_type {};
template <class _Tp>
using __is_inplace_type = __is_inplace_type_imp<__uncvref_t<_Tp>>;
template <class _Tp> struct __is_inplace_index_imp : false_type {};
template <size_t _Idx> struct __is_inplace_index_imp<in_place_index_t<_Idx>> : true_type {};
template <class _Tp>
using __is_inplace_index = __is_inplace_index_imp<__uncvref_t<_Tp>>;
#endif // _LIBCPP_STD_VER > 14
template <class _Arg, class _Result>
struct _LIBCPP_TEMPLATE_VIS unary_function
{
typedef _Arg argument_type;
typedef _Result result_type;
};
template <class _Size>
inline _LIBCPP_INLINE_VISIBILITY
_Size
__loadword(const void* __p)
{
_Size __r;
std::memcpy(&__r, __p, sizeof(__r));
return __r;
}
// We use murmur2 when size_t is 32 bits, and cityhash64 when size_t
// is 64 bits. This is because cityhash64 uses 64bit x 64bit
// multiplication, which can be very slow on 32-bit systems.
template <class _Size, size_t = sizeof(_Size)*__CHAR_BIT__>
struct __murmur2_or_cityhash;
template <class _Size>
struct __murmur2_or_cityhash<_Size, 32>
{
inline _Size operator()(const void* __key, _Size __len)
_LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK;
};
// murmur2
template <class _Size>
_Size
__murmur2_or_cityhash<_Size, 32>::operator()(const void* __key, _Size __len)
{
const _Size __m = 0x5bd1e995;
const _Size __r = 24;
_Size __h = __len;
const unsigned char* __data = static_cast<const unsigned char*>(__key);
for (; __len >= 4; __data += 4, __len -= 4)
{