29 #ifndef _GLIBCXX_DEBUG_UNORDERED_MAP 30 #define _GLIBCXX_DEBUG_UNORDERED_MAP 1 32 #if __cplusplus < 201103L 42 namespace std _GLIBCXX_VISIBILITY(default)
47 template<
typename _Key,
typename _Tp,
53 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>, _Alloc,
54 __gnu_debug::_Safe_unordered_container>,
55 public _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>
57 typedef _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash,
61 typedef typename _Base::const_iterator _Base_const_iterator;
62 typedef typename _Base::iterator _Base_iterator;
63 typedef typename _Base::const_local_iterator
64 _Base_const_local_iterator;
65 typedef typename _Base::local_iterator _Base_local_iterator;
68 typedef typename _Base::size_type size_type;
69 typedef typename _Base::hasher hasher;
70 typedef typename _Base::key_equal key_equal;
71 typedef typename _Base::allocator_type allocator_type;
73 typedef typename _Base::key_type key_type;
74 typedef typename _Base::value_type value_type;
77 _Base_iterator, unordered_map>
iterator;
85 unordered_map() =
default;
88 unordered_map(size_type __n,
89 const hasher& __hf = hasher(),
90 const key_equal& __eql = key_equal(),
91 const allocator_type& __a = allocator_type())
92 : _Base(__n, __hf, __eql, __a) { }
94 template<
typename _InputIterator>
95 unordered_map(_InputIterator __first, _InputIterator __last,
97 const hasher& __hf = hasher(),
98 const key_equal& __eql = key_equal(),
99 const allocator_type& __a = allocator_type())
100 : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
102 __gnu_debug::__base(__last), __n,
103 __hf, __eql, __a) { }
105 unordered_map(
const unordered_map&) =
default;
107 unordered_map(
const _Base& __x)
110 unordered_map(unordered_map&&) =
default;
113 unordered_map(
const allocator_type& __a)
116 unordered_map(
const unordered_map& __umap,
117 const allocator_type& __a)
118 : _Base(__umap, __a) { }
120 unordered_map(unordered_map&& __umap,
121 const allocator_type& __a)
122 : _Safe(std::move(__umap._M_safe()), __a),
123 _Base(std::move(__umap._M_base()), __a) { }
127 const hasher& __hf = hasher(),
128 const key_equal& __eql = key_equal(),
129 const allocator_type& __a = allocator_type())
130 : _Base(__l, __n, __hf, __eql, __a) { }
132 unordered_map(size_type __n,
const allocator_type& __a)
133 : unordered_map(__n, hasher(), key_equal(), __a)
136 unordered_map(size_type __n,
138 const allocator_type& __a)
139 : unordered_map(__n, __hf, key_equal(), __a)
142 template<
typename _InputIterator>
143 unordered_map(_InputIterator __first, _InputIterator __last,
145 const allocator_type& __a)
146 : unordered_map(__first, __last, __n, hasher(), key_equal(), __a)
149 template<
typename _InputIterator>
150 unordered_map(_InputIterator __first, _InputIterator __last,
153 const allocator_type& __a)
154 : unordered_map(__first, __last, __n, __hf, key_equal(), __a)
159 const allocator_type& __a)
160 : unordered_map(__l, __n, hasher(), key_equal(), __a)
166 const allocator_type& __a)
167 : unordered_map(__l, __n, __hf, key_equal(), __a)
170 ~unordered_map() =
default;
173 operator=(
const unordered_map&) =
default;
176 operator=(unordered_map&&) =
default;
182 this->_M_invalidate_all();
187 swap(unordered_map& __x)
188 noexcept( noexcept(declval<_Base&>().swap(__x)) )
198 this->_M_invalidate_all();
203 {
return iterator(_Base::begin(),
this); }
206 begin()
const noexcept
207 {
return const_iterator(_Base::begin(),
this); }
211 {
return iterator(_Base::end(),
this); }
215 {
return const_iterator(_Base::end(),
this); }
218 cbegin()
const noexcept
219 {
return const_iterator(_Base::begin(),
this); }
222 cend()
const noexcept
223 {
return const_iterator(_Base::end(),
this); }
229 __glibcxx_check_bucket_index(__b);
230 return local_iterator(_Base::begin(__b),
this);
236 __glibcxx_check_bucket_index(__b);
237 return local_iterator(_Base::end(__b),
this);
241 begin(size_type __b)
const 243 __glibcxx_check_bucket_index(__b);
244 return const_local_iterator(_Base::begin(__b),
this);
248 end(size_type __b)
const 250 __glibcxx_check_bucket_index(__b);
251 return const_local_iterator(_Base::end(__b),
this);
255 cbegin(size_type __b)
const 257 __glibcxx_check_bucket_index(__b);
258 return const_local_iterator(_Base::cbegin(__b),
this);
262 cend(size_type __b)
const 264 __glibcxx_check_bucket_index(__b);
265 return const_local_iterator(_Base::cend(__b),
this);
269 bucket_size(size_type __b)
const 271 __glibcxx_check_bucket_index(__b);
272 return _Base::bucket_size(__b);
276 max_load_factor()
const noexcept
277 {
return _Base::max_load_factor(); }
280 max_load_factor(
float __f)
282 __glibcxx_check_max_load_factor(__f);
283 _Base::max_load_factor(__f);
286 template<
typename... _Args>
288 emplace(_Args&&... __args)
290 size_type __bucket_count = this->bucket_count();
292 = _Base::emplace(std::forward<_Args>(__args)...);
293 _M_check_rehashed(__bucket_count);
297 template<
typename... _Args>
299 emplace_hint(const_iterator __hint, _Args&&... __args)
302 size_type __bucket_count = this->bucket_count();
303 _Base_iterator __it = _Base::emplace_hint(__hint.
base(),
304 std::forward<_Args>(__args)...);
305 _M_check_rehashed(__bucket_count);
306 return iterator(__it,
this);
310 insert(
const value_type& __obj)
312 size_type __bucket_count = this->bucket_count();
314 _M_check_rehashed(__bucket_count);
319 insert(const_iterator __hint,
const value_type& __obj)
322 size_type __bucket_count = this->bucket_count();
323 _Base_iterator __it = _Base::insert(__hint.
base(), __obj);
324 _M_check_rehashed(__bucket_count);
325 return iterator(__it,
this);
328 template<
typename _Pair,
typename =
typename 329 std::enable_if<std::is_constructible<value_type,
330 _Pair&&>::value>::type>
332 insert(_Pair&& __obj)
334 size_type __bucket_count = this->bucket_count();
336 _Base::insert(std::forward<_Pair>(__obj));
337 _M_check_rehashed(__bucket_count);
341 template<
typename _Pair,
typename =
typename 342 std::enable_if<std::is_constructible<value_type,
343 _Pair&&>::value>::type>
345 insert(const_iterator __hint, _Pair&& __obj)
348 size_type __bucket_count = this->bucket_count();
349 _Base_iterator __it =
350 _Base::insert(__hint.
base(), std::forward<_Pair>(__obj));
351 _M_check_rehashed(__bucket_count);
352 return iterator(__it,
this);
358 size_type __bucket_count = this->bucket_count();
360 _M_check_rehashed(__bucket_count);
363 template<
typename _InputIterator>
365 insert(_InputIterator __first, _InputIterator __last)
368 __glibcxx_check_valid_range2(__first, __last, __dist);
369 size_type __bucket_count = this->bucket_count();
371 if (__dist.
second >= __gnu_debug::__dp_sign)
372 _Base::insert(__gnu_debug::__unsafe(__first),
373 __gnu_debug::__unsafe(__last));
375 _Base::insert(__first, __last);
377 _M_check_rehashed(__bucket_count);
380 #if __cplusplus > 201402L 381 template <
typename... _Args>
383 try_emplace(
const key_type& __k, _Args&&... __args)
385 auto __res = _Base::try_emplace(__k,
386 std::forward<_Args>(__args)...);
387 return { iterator(__res.first,
this), __res.second };
390 template <
typename... _Args>
392 try_emplace(key_type&& __k, _Args&&... __args)
394 auto __res = _Base::try_emplace(std::move(__k),
395 std::forward<_Args>(__args)...);
396 return { iterator(__res.first,
this), __res.second };
399 template <
typename... _Args>
401 try_emplace(const_iterator __hint,
const key_type& __k,
405 return iterator(_Base::try_emplace(__hint.
base(), __k,
406 std::forward<_Args>(__args)...),
410 template <
typename... _Args>
412 try_emplace(const_iterator __hint, key_type&& __k, _Args&&... __args)
415 return iterator(_Base::try_emplace(__hint.
base(), std::move(__k),
416 std::forward<_Args>(__args)...),
420 template <
typename _Obj>
422 insert_or_assign(
const key_type& __k, _Obj&& __obj)
424 auto __res = _Base::insert_or_assign(__k,
425 std::forward<_Obj>(__obj));
426 return { iterator(__res.first,
this), __res.second };
429 template <
typename _Obj>
431 insert_or_assign(key_type&& __k, _Obj&& __obj)
433 auto __res = _Base::insert_or_assign(std::move(__k),
434 std::forward<_Obj>(__obj));
435 return { iterator(__res.first,
this), __res.second };
438 template <
typename _Obj>
440 insert_or_assign(const_iterator __hint,
const key_type& __k,
444 return iterator(_Base::insert_or_assign(__hint.
base(), __k,
445 std::forward<_Obj>(__obj)),
449 template <
typename _Obj>
451 insert_or_assign(const_iterator __hint, key_type&& __k, _Obj&& __obj)
454 return iterator(_Base::insert_or_assign(__hint.
base(),
456 std::forward<_Obj>(__obj)),
463 find(
const key_type& __key)
464 {
return iterator(_Base::find(__key),
this); }
467 find(
const key_type& __key)
const 468 {
return const_iterator(_Base::find(__key),
this); }
471 equal_range(
const key_type& __key)
474 _Base::equal_range(__key);
476 iterator(__res.
second,
this));
480 equal_range(
const key_type& __key)
const 483 _Base::equal_range(__key);
485 const_iterator(__res.
second,
this));
489 erase(
const key_type& __key)
492 _Base_iterator __victim(_Base::find(__key));
493 if (__victim != _Base::end())
496 {
return __it == __victim; });
498 [__victim](_Base_const_local_iterator __it)
499 {
return __it._M_curr() == __victim._M_cur; });
500 size_type __bucket_count = this->bucket_count();
501 _Base::erase(__victim);
502 _M_check_rehashed(__bucket_count);
509 erase(const_iterator __it)
512 _Base_const_iterator __victim = __it.
base();
514 {
return __it == __victim; });
516 [__victim](_Base_const_local_iterator __it)
517 {
return __it._M_curr() == __victim._M_cur; });
518 size_type __bucket_count = this->bucket_count();
519 _Base_iterator __next = _Base::erase(__it.base());
520 _M_check_rehashed(__bucket_count);
521 return iterator(__next,
this);
526 {
return erase(const_iterator(__it)); }
529 erase(const_iterator __first, const_iterator __last)
532 for (_Base_const_iterator __tmp = __first.
base();
533 __tmp != __last.
base(); ++__tmp)
535 _GLIBCXX_DEBUG_VERIFY(__tmp != _Base::end(),
536 _M_message(__gnu_debug::__msg_valid_range)
537 ._M_iterator(__first,
"first")
538 ._M_iterator(__last,
"last"));
540 {
return __it == __tmp; });
542 [__tmp](_Base_const_local_iterator __it)
543 {
return __it._M_curr() == __tmp._M_cur; });
545 size_type __bucket_count = this->bucket_count();
546 _Base_iterator __next = _Base::erase(__first.
base(), __last.
base());
547 _M_check_rehashed(__bucket_count);
548 return iterator(__next,
this);
552 _M_base() noexcept {
return *
this; }
555 _M_base()
const noexcept {
return *
this; }
559 _M_check_rehashed(size_type __prev_count)
561 if (__prev_count != this->bucket_count())
562 this->_M_invalidate_locals();
566 template<
typename _Key,
typename _Tp,
typename _Hash,
567 typename _Pred,
typename _Alloc>
571 noexcept(noexcept(__x.swap(__y)))
574 template<
typename _Key,
typename _Tp,
typename _Hash,
575 typename _Pred,
typename _Alloc>
579 {
return __x._M_base() == __y._M_base(); }
581 template<
typename _Key,
typename _Tp,
typename _Hash,
582 typename _Pred,
typename _Alloc>
586 {
return !(__x == __y); }
590 template<
typename _Key,
typename _Tp,
596 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>, _Alloc,
597 __gnu_debug::_Safe_unordered_container>,
598 public _GLIBCXX_STD_C::unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>
600 typedef _GLIBCXX_STD_C::unordered_multimap<_Key, _Tp, _Hash,
601 _Pred, _Alloc>
_Base;
604 typedef typename _Base::const_iterator _Base_const_iterator;
605 typedef typename _Base::iterator _Base_iterator;
606 typedef typename _Base::const_local_iterator _Base_const_local_iterator;
607 typedef typename _Base::local_iterator _Base_local_iterator;
610 typedef typename _Base::size_type size_type;
611 typedef typename _Base::hasher hasher;
612 typedef typename _Base::key_equal key_equal;
613 typedef typename _Base::allocator_type allocator_type;
615 typedef typename _Base::key_type key_type;
616 typedef typename _Base::value_type value_type;
619 _Base_iterator, unordered_multimap>
iterator;
627 unordered_multimap() =
default;
630 unordered_multimap(size_type __n,
631 const hasher& __hf = hasher(),
632 const key_equal& __eql = key_equal(),
633 const allocator_type& __a = allocator_type())
634 : _Base(__n, __hf, __eql, __a) { }
636 template<
typename _InputIterator>
637 unordered_multimap(_InputIterator __first, _InputIterator __last,
639 const hasher& __hf = hasher(),
640 const key_equal& __eql = key_equal(),
641 const allocator_type& __a = allocator_type())
642 : _Base(__gnu_debug::__base(__gnu_debug::__check_valid_range(__first,
644 __gnu_debug::__base(__last), __n,
645 __hf, __eql, __a) { }
647 unordered_multimap(
const unordered_multimap&) =
default;
649 unordered_multimap(
const _Base& __x)
652 unordered_multimap(unordered_multimap&&) =
default;
655 unordered_multimap(
const allocator_type& __a)
658 unordered_multimap(
const unordered_multimap& __umap,
659 const allocator_type& __a)
660 : _Base(__umap, __a) { }
662 unordered_multimap(unordered_multimap&& __umap,
663 const allocator_type& __a)
664 : _Safe(std::move(__umap._M_safe()), __a),
665 _Base(std::move(__umap._M_base()), __a) { }
669 const hasher& __hf = hasher(),
670 const key_equal& __eql = key_equal(),
671 const allocator_type& __a = allocator_type())
672 : _Base(__l, __n, __hf, __eql, __a) { }
674 unordered_multimap(size_type __n,
const allocator_type& __a)
675 : unordered_multimap(__n, hasher(), key_equal(), __a)
678 unordered_multimap(size_type __n,
const hasher& __hf,
679 const allocator_type& __a)
680 : unordered_multimap(__n, __hf, key_equal(), __a)
683 template<
typename _InputIterator>
684 unordered_multimap(_InputIterator __first, _InputIterator __last,
686 const allocator_type& __a)
687 : unordered_multimap(__first, __last, __n, hasher(), key_equal(), __a)
690 template<
typename _InputIterator>
691 unordered_multimap(_InputIterator __first, _InputIterator __last,
692 size_type __n,
const hasher& __hf,
693 const allocator_type& __a)
694 : unordered_multimap(__first, __last, __n, __hf, key_equal(), __a)
699 const allocator_type& __a)
700 : unordered_multimap(__l, __n, hasher(), key_equal(), __a)
704 size_type __n,
const hasher& __hf,
705 const allocator_type& __a)
706 : unordered_multimap(__l, __n, __hf, key_equal(), __a)
709 ~unordered_multimap() =
default;
712 operator=(
const unordered_multimap&) =
default;
715 operator=(unordered_multimap&&) =
default;
720 this->_M_base() = __l;
721 this->_M_invalidate_all();
726 swap(unordered_multimap& __x)
727 noexcept( noexcept(declval<_Base&>().swap(__x)) )
737 this->_M_invalidate_all();
742 {
return iterator(_Base::begin(),
this); }
745 begin()
const noexcept
746 {
return const_iterator(_Base::begin(),
this); }
750 {
return iterator(_Base::end(),
this); }
754 {
return const_iterator(_Base::end(),
this); }
758 {
return const_iterator(_Base::begin(),
this); }
761 cend()
const noexcept
762 {
return const_iterator(_Base::end(),
this); }
768 __glibcxx_check_bucket_index(__b);
769 return local_iterator(_Base::begin(__b),
this);
775 __glibcxx_check_bucket_index(__b);
776 return local_iterator(_Base::end(__b),
this);
780 begin(size_type __b)
const 782 __glibcxx_check_bucket_index(__b);
783 return const_local_iterator(_Base::begin(__b),
this);
787 end(size_type __b)
const 789 __glibcxx_check_bucket_index(__b);
790 return const_local_iterator(_Base::end(__b),
this);
794 cbegin(size_type __b)
const 796 __glibcxx_check_bucket_index(__b);
797 return const_local_iterator(_Base::cbegin(__b),
this);
801 cend(size_type __b)
const 803 __glibcxx_check_bucket_index(__b);
804 return const_local_iterator(_Base::cend(__b),
this);
808 bucket_size(size_type __b)
const 810 __glibcxx_check_bucket_index(__b);
811 return _Base::bucket_size(__b);
815 max_load_factor()
const noexcept
816 {
return _Base::max_load_factor(); }
819 max_load_factor(
float __f)
821 __glibcxx_check_max_load_factor(__f);
822 _Base::max_load_factor(__f);
825 template<
typename... _Args>
827 emplace(_Args&&... __args)
829 size_type __bucket_count = this->bucket_count();
831 = _Base::emplace(std::forward<_Args>(__args)...);
832 _M_check_rehashed(__bucket_count);
833 return iterator(__it,
this);
836 template<
typename... _Args>
838 emplace_hint(const_iterator __hint, _Args&&... __args)
841 size_type __bucket_count = this->bucket_count();
842 _Base_iterator __it = _Base::emplace_hint(__hint.
base(),
843 std::forward<_Args>(__args)...);
844 _M_check_rehashed(__bucket_count);
845 return iterator(__it,
this);
849 insert(
const value_type& __obj)
851 size_type __bucket_count = this->bucket_count();
852 _Base_iterator __it = _Base::insert(__obj);
853 _M_check_rehashed(__bucket_count);
854 return iterator(__it,
this);
858 insert(const_iterator __hint,
const value_type& __obj)
861 size_type __bucket_count = this->bucket_count();
862 _Base_iterator __it = _Base::insert(__hint.
base(), __obj);
863 _M_check_rehashed(__bucket_count);
864 return iterator(__it,
this);
867 template<
typename _Pair,
typename =
typename 868 std::enable_if<std::is_constructible<value_type,
869 _Pair&&>::value>::type>
871 insert(_Pair&& __obj)
873 size_type __bucket_count = this->bucket_count();
874 _Base_iterator __it = _Base::insert(std::forward<_Pair>(__obj));
875 _M_check_rehashed(__bucket_count);
876 return iterator(__it,
this);
879 template<
typename _Pair,
typename =
typename 880 std::enable_if<std::is_constructible<value_type,
881 _Pair&&>::value>::type>
883 insert(const_iterator __hint, _Pair&& __obj)
886 size_type __bucket_count = this->bucket_count();
887 _Base_iterator __it =
888 _Base::insert(__hint.
base(), std::forward<_Pair>(__obj));
889 _M_check_rehashed(__bucket_count);
890 return iterator(__it,
this);
895 { _Base::insert(__l); }
897 template<
typename _InputIterator>
899 insert(_InputIterator __first, _InputIterator __last)
902 __glibcxx_check_valid_range2(__first, __last, __dist);
903 size_type __bucket_count = this->bucket_count();
905 if (__dist.
second >= __gnu_debug::__dp_sign)
906 _Base::insert(__gnu_debug::__unsafe(__first),
907 __gnu_debug::__unsafe(__last));
909 _Base::insert(__first, __last);
911 _M_check_rehashed(__bucket_count);
915 find(
const key_type& __key)
916 {
return iterator(_Base::find(__key),
this); }
919 find(
const key_type& __key)
const 920 {
return const_iterator(_Base::find(__key),
this); }
923 equal_range(
const key_type& __key)
926 _Base::equal_range(__key);
928 iterator(__res.
second,
this));
932 equal_range(
const key_type& __key)
const 935 _Base::equal_range(__key);
937 const_iterator(__res.
second,
this));
941 erase(
const key_type& __key)
944 size_type __bucket_count = this->bucket_count();
946 _Base::equal_range(__key);
947 for (_Base_iterator __victim = __pair.
first; __victim != __pair.
second;)
950 {
return __it == __victim; });
952 [__victim](_Base_const_local_iterator __it)
953 {
return __it._M_curr() == __victim._M_cur; });
954 _Base::erase(__victim++);
957 _M_check_rehashed(__bucket_count);
962 erase(const_iterator __it)
965 _Base_const_iterator __victim = __it.
base();
967 {
return __it == __victim; });
969 [__victim](_Base_const_local_iterator __it)
970 {
return __it._M_curr() == __victim._M_cur; });
971 size_type __bucket_count = this->bucket_count();
972 _Base_iterator __next = _Base::erase(__it.base());
973 _M_check_rehashed(__bucket_count);
974 return iterator(__next,
this);
979 {
return erase(const_iterator(__it)); }
982 erase(const_iterator __first, const_iterator __last)
985 for (_Base_const_iterator __tmp = __first.
base();
986 __tmp != __last.
base(); ++__tmp)
988 _GLIBCXX_DEBUG_VERIFY(__tmp != _Base::end(),
989 _M_message(__gnu_debug::__msg_valid_range)
990 ._M_iterator(__first,
"first")
991 ._M_iterator(__last,
"last"));
993 {
return __it == __tmp; });
995 [__tmp](_Base_const_local_iterator __it)
996 {
return __it._M_curr() == __tmp._M_cur; });
998 size_type __bucket_count = this->bucket_count();
999 _Base_iterator __next = _Base::erase(__first.
base(), __last.
base());
1000 _M_check_rehashed(__bucket_count);
1001 return iterator(__next,
this);
1005 _M_base() noexcept {
return *
this; }
1008 _M_base()
const noexcept {
return *
this; }
1012 _M_check_rehashed(size_type __prev_count)
1014 if (__prev_count != this->bucket_count())
1015 this->_M_invalidate_locals();
1019 template<
typename _Key,
typename _Tp,
typename _Hash,
1020 typename _Pred,
typename _Alloc>
1024 noexcept(noexcept(__x.swap(__y)))
1027 template<
typename _Key,
typename _Tp,
typename _Hash,
1028 typename _Pred,
typename _Alloc>
1032 {
return __x._M_base() == __y._M_base(); }
1034 template<
typename _Key,
typename _Tp,
typename _Hash,
1035 typename _Pred,
typename _Alloc>
1039 {
return !(__x == __y); }
void _M_invalidate_local_if(_Predicate __pred)
The standard allocator, as per [20.4].
void _M_invalidate_if(_Predicate __pred)
#define __glibcxx_check_erase_range(_First, _Last)
One of the comparison functors.
constexpr const _Tp * begin(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to the first element of the initializer_list.
Base class for constructing a safe unordered container type that tracks iterators that reference it...
Class std::unordered_multimap with safety/checking/debug instrumentation.
Safe class dealing with some allocator dependent operations.
constexpr auto cend(const _Container &__cont) noexcept(noexcept(std::end(__cont))) -> decltype(std::end(__cont))
Return an iterator pointing to one past the last element of the const container.
_T1 first
second_type is the second bound type
#define __glibcxx_check_erase(_Position)
constexpr auto cbegin(const _Container &__cont) noexcept(noexcept(std::begin(__cont))) -> decltype(std::begin(__cont))
Return an iterator pointing to the first element of the const container.
ISO C++ entities toplevel namespace is std.
_Iterator & base() noexcept
Return the underlying iterator.
Primary class template hash.
Base class that supports tracking of iterators that reference a sequence.
constexpr const _Tp * end(initializer_list< _Tp > __ils) noexcept
Return an iterator pointing to one past the last element of the initializer_list. ...
Class std::unordered_map with safety/checking/debug instrumentation.
#define __glibcxx_check_insert(_Position)
constexpr pair< typename __decay_and_strip< _T1 >::__type, typename __decay_and_strip< _T2 >::__type > make_pair(_T1 &&__x, _T2 &&__y)
A convenience wrapper for creating a pair from two objects.
Struct holding two objects of arbitrary type.
_T2 second
first is a copy of the first object