1 // Debugging unordered_map/unordered_multimap implementation -*- C++ -*-
3 // Copyright (C) 2003-2022 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
20 // You should have received a copy of the GNU General Public License and
21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23 // <http://www.gnu.org/licenses/>.
25 /** @file debug/unordered_map
26 * This file is a GNU debug extension to the Standard C++ Library.
29 #ifndef _GLIBCXX_DEBUG_UNORDERED_MAP
30 #define _GLIBCXX_DEBUG_UNORDERED_MAP 1
32 #pragma GCC system_header
34 #if __cplusplus < 201103L
35 # include <bits/c++0x_warning.h>
37 # include <bits/c++config.h>
38 namespace std _GLIBCXX_VISIBILITY(default) { namespace __debug {
39 template<typename _Key, typename _Tp, typename _Hash, typename _Pred,
42 template<typename _Key, typename _Tp, typename _Hash, typename _Pred,
44 class unordered_multimap;
45 } } // namespace std::__debug
47 # include <unordered_map>
49 #include <debug/safe_unordered_container.h>
50 #include <debug/safe_container.h>
51 #include <debug/safe_iterator.h>
52 #include <debug/safe_local_iterator.h>
54 namespace std _GLIBCXX_VISIBILITY(default)
58 /// Class std::unordered_map with safety/checking/debug instrumentation.
59 template<typename _Key, typename _Tp,
60 typename _Hash = std::hash<_Key>,
61 typename _Pred = std::equal_to<_Key>,
62 typename _Alloc = std::allocator<std::pair<const _Key, _Tp> > >
64 : public __gnu_debug::_Safe_container<
65 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>, _Alloc,
66 __gnu_debug::_Safe_unordered_container>,
67 public _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>
69 typedef _GLIBCXX_STD_C::unordered_map<_Key, _Tp, _Hash,
71 typedef __gnu_debug::_Safe_container<unordered_map,
72 _Alloc, __gnu_debug::_Safe_unordered_container> _Safe;
73 typedef typename _Base::const_iterator _Base_const_iterator;
74 typedef typename _Base::iterator _Base_iterator;
75 typedef typename _Base::const_local_iterator
76 _Base_const_local_iterator;
77 typedef typename _Base::local_iterator _Base_local_iterator;
79 template<typename _ItT, typename _SeqT, typename _CatT>
80 friend class ::__gnu_debug::_Safe_iterator;
81 template<typename _ItT, typename _SeqT>
82 friend class ::__gnu_debug::_Safe_local_iterator;
84 // Reference wrapper for base class. See PR libstdc++/90102.
87 _Base_ref(const _Base& __r) : _M_ref(__r) { }
93 typedef typename _Base::size_type size_type;
94 typedef typename _Base::hasher hasher;
95 typedef typename _Base::key_equal key_equal;
96 typedef typename _Base::allocator_type allocator_type;
98 typedef typename _Base::key_type key_type;
99 typedef typename _Base::value_type value_type;
100 typedef typename _Base::mapped_type mapped_type;
102 typedef typename _Base::pointer pointer;
103 typedef typename _Base::const_pointer const_pointer;
104 typedef typename _Base::reference reference;
105 typedef typename _Base::const_reference const_reference;
106 typedef __gnu_debug::_Safe_iterator<
107 _Base_iterator, unordered_map> iterator;
108 typedef __gnu_debug::_Safe_iterator<
109 _Base_const_iterator, unordered_map> const_iterator;
110 typedef __gnu_debug::_Safe_local_iterator<
111 _Base_local_iterator, unordered_map> local_iterator;
112 typedef __gnu_debug::_Safe_local_iterator<
113 _Base_const_local_iterator, unordered_map> const_local_iterator;
114 typedef typename _Base::difference_type difference_type;
116 unordered_map() = default;
119 unordered_map(size_type __n,
120 const hasher& __hf = hasher(),
121 const key_equal& __eql = key_equal(),
122 const allocator_type& __a = allocator_type())
123 : _Base(__n, __hf, __eql, __a) { }
125 template<typename _InputIterator>
126 unordered_map(_InputIterator __first, _InputIterator __last,
128 const hasher& __hf = hasher(),
129 const key_equal& __eql = key_equal(),
130 const allocator_type& __a = allocator_type())
131 : _Base(__gnu_debug::__base(
132 __glibcxx_check_valid_constructor_range(__first, __last)),
133 __gnu_debug::__base(__last), __n,
134 __hf, __eql, __a) { }
136 unordered_map(const unordered_map&) = default;
138 unordered_map(_Base_ref __x)
139 : _Base(__x._M_ref) { }
141 unordered_map(unordered_map&&) = default;
144 unordered_map(const allocator_type& __a)
147 unordered_map(const unordered_map& __umap,
148 const allocator_type& __a)
149 : _Base(__umap, __a) { }
151 unordered_map(unordered_map&& __umap,
152 const allocator_type& __a)
153 noexcept( noexcept(_Base(std::move(__umap), __a)) )
154 : _Safe(std::move(__umap), __a),
155 _Base(std::move(__umap), __a) { }
157 unordered_map(initializer_list<value_type> __l,
159 const hasher& __hf = hasher(),
160 const key_equal& __eql = key_equal(),
161 const allocator_type& __a = allocator_type())
162 : _Base(__l, __n, __hf, __eql, __a) { }
164 unordered_map(size_type __n, const allocator_type& __a)
165 : unordered_map(__n, hasher(), key_equal(), __a)
168 unordered_map(size_type __n,
170 const allocator_type& __a)
171 : unordered_map(__n, __hf, key_equal(), __a)
174 template<typename _InputIterator>
175 unordered_map(_InputIterator __first, _InputIterator __last,
177 const allocator_type& __a)
178 : unordered_map(__first, __last, __n, hasher(), key_equal(), __a)
181 template<typename _InputIterator>
182 unordered_map(_InputIterator __first, _InputIterator __last,
185 const allocator_type& __a)
186 : unordered_map(__first, __last, __n, __hf, key_equal(), __a)
189 unordered_map(initializer_list<value_type> __l,
191 const allocator_type& __a)
192 : unordered_map(__l, __n, hasher(), key_equal(), __a)
195 unordered_map(initializer_list<value_type> __l,
198 const allocator_type& __a)
199 : unordered_map(__l, __n, __hf, key_equal(), __a)
202 ~unordered_map() = default;
205 operator=(const unordered_map&) = default;
208 operator=(unordered_map&&) = default;
211 operator=(initializer_list<value_type> __l)
213 _Base::operator=(__l);
214 this->_M_invalidate_all();
218 using _Base::get_allocator;
221 using _Base::max_size;
224 swap(unordered_map& __x)
225 noexcept( noexcept(declval<_Base&>().swap(__x)) )
235 this->_M_invalidate_all();
240 { return { _Base::begin(), this }; }
243 begin() const noexcept
244 { return { _Base::begin(), this }; }
248 { return { _Base::end(), this }; }
252 { return { _Base::end(), this }; }
255 cbegin() const noexcept
256 { return { _Base::cbegin(), this }; }
259 cend() const noexcept
260 { return { _Base::cend(), this }; }
266 __glibcxx_check_bucket_index(__b);
267 return { _Base::begin(__b), this };
273 __glibcxx_check_bucket_index(__b);
274 return { _Base::end(__b), this };
278 begin(size_type __b) const
280 __glibcxx_check_bucket_index(__b);
281 return { _Base::begin(__b), this };
285 end(size_type __b) const
287 __glibcxx_check_bucket_index(__b);
288 return { _Base::end(__b), this };
292 cbegin(size_type __b) const
294 __glibcxx_check_bucket_index(__b);
295 return { _Base::cbegin(__b), this };
299 cend(size_type __b) const
301 __glibcxx_check_bucket_index(__b);
302 return { _Base::cend(__b), this };
305 using _Base::bucket_count;
306 using _Base::max_bucket_count;
310 bucket_size(size_type __b) const
312 __glibcxx_check_bucket_index(__b);
313 return _Base::bucket_size(__b);
316 using _Base::load_factor;
319 max_load_factor() const noexcept
320 { return _Base::max_load_factor(); }
323 max_load_factor(float __f)
325 __glibcxx_check_max_load_factor(__f);
326 _Base::max_load_factor(__f);
329 template<typename... _Args>
330 std::pair<iterator, bool>
331 emplace(_Args&&... __args)
333 size_type __bucket_count = this->bucket_count();
334 auto __res = _Base::emplace(std::forward<_Args>(__args)...);
335 _M_check_rehashed(__bucket_count);
336 return { { __res.first, this }, __res.second };
339 template<typename... _Args>
341 emplace_hint(const_iterator __hint, _Args&&... __args)
343 __glibcxx_check_insert(__hint);
344 size_type __bucket_count = this->bucket_count();
345 auto __it = _Base::emplace_hint(__hint.base(),
346 std::forward<_Args>(__args)...);
347 _M_check_rehashed(__bucket_count);
348 return { __it, this };
351 std::pair<iterator, bool>
352 insert(const value_type& __obj)
354 size_type __bucket_count = this->bucket_count();
355 auto __res = _Base::insert(__obj);
356 _M_check_rehashed(__bucket_count);
357 return { { __res.first, this }, __res.second };
360 // _GLIBCXX_RESOLVE_LIB_DEFECTS
361 // 2354. Unnecessary copying when inserting into maps with braced-init
362 std::pair<iterator, bool>
363 insert(value_type&& __x)
365 size_type __bucket_count = this->bucket_count();
366 auto __res = _Base::insert(std::move(__x));
367 _M_check_rehashed(__bucket_count);
368 return { { __res.first, this }, __res.second };
371 template<typename _Pair, typename = typename
372 std::enable_if<std::is_constructible<value_type,
373 _Pair&&>::value>::type>
374 std::pair<iterator, bool>
375 insert(_Pair&& __obj)
377 size_type __bucket_count = this->bucket_count();
378 auto __res = _Base::insert(std::forward<_Pair>(__obj));
379 _M_check_rehashed(__bucket_count);
380 return { { __res.first, this }, __res.second };
384 insert(const_iterator __hint, const value_type& __obj)
386 __glibcxx_check_insert(__hint);
387 size_type __bucket_count = this->bucket_count();
388 auto __it = _Base::insert(__hint.base(), __obj);
389 _M_check_rehashed(__bucket_count);
390 return { __it, this };
393 // _GLIBCXX_RESOLVE_LIB_DEFECTS
394 // 2354. Unnecessary copying when inserting into maps with braced-init
396 insert(const_iterator __hint, value_type&& __x)
398 __glibcxx_check_insert(__hint);
399 size_type __bucket_count = this->bucket_count();
400 auto __it = _Base::insert(__hint.base(), std::move(__x));
401 _M_check_rehashed(__bucket_count);
402 return { __it, this };
405 template<typename _Pair, typename = typename
406 std::enable_if<std::is_constructible<value_type,
407 _Pair&&>::value>::type>
409 insert(const_iterator __hint, _Pair&& __obj)
411 __glibcxx_check_insert(__hint);
412 size_type __bucket_count = this->bucket_count();
413 auto __it = _Base::insert(__hint.base(), std::forward<_Pair>(__obj));
414 _M_check_rehashed(__bucket_count);
415 return { __it, this };
419 insert(std::initializer_list<value_type> __l)
421 size_type __bucket_count = this->bucket_count();
423 _M_check_rehashed(__bucket_count);
426 template<typename _InputIterator>
428 insert(_InputIterator __first, _InputIterator __last)
430 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
431 __glibcxx_check_valid_range2(__first, __last, __dist);
432 size_type __bucket_count = this->bucket_count();
434 if (__dist.second >= __gnu_debug::__dp_sign)
435 _Base::insert(__gnu_debug::__unsafe(__first),
436 __gnu_debug::__unsafe(__last));
438 _Base::insert(__first, __last);
440 _M_check_rehashed(__bucket_count);
443 #if __cplusplus > 201402L
444 template <typename... _Args>
446 try_emplace(const key_type& __k, _Args&&... __args)
448 auto __res = _Base::try_emplace(__k,
449 std::forward<_Args>(__args)...);
450 return { { __res.first, this }, __res.second };
453 template <typename... _Args>
455 try_emplace(key_type&& __k, _Args&&... __args)
457 auto __res = _Base::try_emplace(std::move(__k),
458 std::forward<_Args>(__args)...);
459 return { { __res.first, this }, __res.second };
462 template <typename... _Args>
464 try_emplace(const_iterator __hint, const key_type& __k,
467 __glibcxx_check_insert(__hint);
468 return { _Base::try_emplace(__hint.base(), __k,
469 std::forward<_Args>(__args)...),
473 template <typename... _Args>
475 try_emplace(const_iterator __hint, key_type&& __k, _Args&&... __args)
477 __glibcxx_check_insert(__hint);
478 return { _Base::try_emplace(__hint.base(), std::move(__k),
479 std::forward<_Args>(__args)...),
483 template <typename _Obj>
485 insert_or_assign(const key_type& __k, _Obj&& __obj)
487 auto __res = _Base::insert_or_assign(__k,
488 std::forward<_Obj>(__obj));
489 return { { __res.first, this }, __res.second };
492 template <typename _Obj>
494 insert_or_assign(key_type&& __k, _Obj&& __obj)
496 auto __res = _Base::insert_or_assign(std::move(__k),
497 std::forward<_Obj>(__obj));
498 return { { __res.first, this }, __res.second };
501 template <typename _Obj>
503 insert_or_assign(const_iterator __hint, const key_type& __k,
506 __glibcxx_check_insert(__hint);
507 return { _Base::insert_or_assign(__hint.base(), __k,
508 std::forward<_Obj>(__obj)),
512 template <typename _Obj>
514 insert_or_assign(const_iterator __hint, key_type&& __k, _Obj&& __obj)
516 __glibcxx_check_insert(__hint);
517 return { _Base::insert_or_assign(__hint.base(), std::move(__k),
518 std::forward<_Obj>(__obj)),
523 #if __cplusplus > 201402L
524 using node_type = typename _Base::node_type;
525 using insert_return_type = _Node_insert_return<iterator, node_type>;
528 extract(const_iterator __position)
530 __glibcxx_check_erase(__position);
531 return _M_extract(__position.base());
535 extract(const key_type& __key)
537 const auto __position = _Base::find(__key);
538 if (__position != _Base::end())
539 return _M_extract(__position);
544 insert(node_type&& __nh)
546 auto __ret = _Base::insert(std::move(__nh));
548 { { __ret.position, this }, __ret.inserted, std::move(__ret.node) };
552 insert(const_iterator __hint, node_type&& __nh)
554 __glibcxx_check_insert(__hint);
555 return { _Base::insert(__hint.base(), std::move(__nh)), this };
558 template<typename _H2, typename _P2>
560 merge(unordered_map<_Key, _Tp, _H2, _P2, _Alloc>& __source)
563 = _Safe::_S_uc_guard(std::__detail::_Select1st{}, __source);
564 _Base::merge(__source);
567 template<typename _H2, typename _P2>
569 merge(unordered_map<_Key, _Tp, _H2, _P2, _Alloc>&& __source)
572 template<typename _H2, typename _P2>
574 merge(unordered_multimap<_Key, _Tp, _H2, _P2, _Alloc>& __source)
577 = _Safe::_S_umc_guard(std::__detail::_Select1st{}, __source);
578 _Base::merge(__source);
581 template<typename _H2, typename _P2>
583 merge(unordered_multimap<_Key, _Tp, _H2, _P2, _Alloc>&& __source)
587 using _Base::hash_function;
591 find(const key_type& __key)
592 { return { _Base::find(__key), this }; }
594 #if __cplusplus > 201703L
595 template<typename _Kt,
596 typename = std::__has_is_transparent_t<_Hash, _Kt>,
597 typename = std::__has_is_transparent_t<_Pred, _Kt>>
600 { return { _Base::find(__k), this }; }
604 find(const key_type& __key) const
605 { return { _Base::find(__key), this }; }
607 #if __cplusplus > 201703L
608 template<typename _Kt,
609 typename = std::__has_is_transparent_t<_Hash, _Kt>,
610 typename = std::__has_is_transparent_t<_Pred, _Kt>>
612 find(const _Kt& __k) const
613 { return { _Base::find(__k), this }; }
617 #if __cplusplus > 201703L
618 using _Base::contains;
621 std::pair<iterator, iterator>
622 equal_range(const key_type& __key)
624 auto __res = _Base::equal_range(__key);
625 return { { __res.first, this }, { __res.second, this } };
628 #if __cplusplus > 201703L
629 template<typename _Kt,
630 typename = std::__has_is_transparent_t<_Hash, _Kt>,
631 typename = std::__has_is_transparent_t<_Pred, _Kt>>
632 std::pair<iterator, iterator>
633 equal_range(const _Kt& __k)
635 auto __res = _Base::equal_range(__k);
636 return { { __res.first, this }, { __res.second, this } };
640 std::pair<const_iterator, const_iterator>
641 equal_range(const key_type& __key) const
643 auto __res = _Base::equal_range(__key);
644 return { { __res.first, this }, { __res.second, this } };
647 #if __cplusplus > 201703L
648 template<typename _Kt,
649 typename = std::__has_is_transparent_t<_Hash, _Kt>,
650 typename = std::__has_is_transparent_t<_Pred, _Kt>>
651 std::pair<const_iterator, const_iterator>
652 equal_range(const _Kt& __k) const
654 auto __res = _Base::equal_range(__k);
655 return { { __res.first, this }, { __res.second, this } };
659 using _Base::operator[];
663 erase(const key_type& __key)
666 auto __victim = _Base::find(__key);
667 if (__victim != _Base::end())
676 erase(const_iterator __it)
678 __glibcxx_check_erase(__it);
679 return { _M_erase(__it.base()), this };
683 erase(_Base_const_iterator __it)
685 __glibcxx_check_erase2(__it);
686 return _M_erase(__it);
692 __glibcxx_check_erase(__it);
693 return { _M_erase(__it.base()), this };
697 erase(const_iterator __first, const_iterator __last)
699 __glibcxx_check_erase_range(__first, __last);
700 for (auto __tmp = __first.base(); __tmp != __last.base(); ++__tmp)
702 _GLIBCXX_DEBUG_VERIFY(__tmp != _Base::cend(),
703 _M_message(__gnu_debug::__msg_valid_range)
704 ._M_iterator(__first, "first")
705 ._M_iterator(__last, "last"));
706 _M_invalidate(__tmp);
709 size_type __bucket_count = this->bucket_count();
710 auto __next = _Base::erase(__first.base(), __last.base());
711 _M_check_rehashed(__bucket_count);
712 return { __next, this };
716 using _Base::reserve;
719 _M_base() noexcept { return *this; }
722 _M_base() const noexcept { return *this; }
726 _M_check_rehashed(size_type __prev_count)
728 if (__prev_count != this->bucket_count())
729 this->_M_invalidate_all();
733 _M_invalidate(_Base_const_iterator __victim)
735 this->_M_invalidate_if(
736 [__victim](_Base_const_iterator __it) { return __it == __victim; });
737 this->_M_invalidate_local_if(
738 [__victim](_Base_const_local_iterator __it)
739 { return __it == __victim; });
743 _M_erase(_Base_const_iterator __victim)
745 _M_invalidate(__victim);
746 size_type __bucket_count = this->bucket_count();
747 _Base_iterator __next = _Base::erase(__victim);
748 _M_check_rehashed(__bucket_count);
752 #if __cplusplus > 201402L
754 _M_extract(_Base_const_iterator __victim)
756 _M_invalidate(__victim);
757 return _Base::extract(__victim);
762 #if __cpp_deduction_guides >= 201606
764 template<typename _InputIterator,
765 typename _Hash = hash<__iter_key_t<_InputIterator>>,
766 typename _Pred = equal_to<__iter_key_t<_InputIterator>>,
767 typename _Allocator = allocator<__iter_to_alloc_t<_InputIterator>>,
768 typename = _RequireInputIter<_InputIterator>,
769 typename = _RequireNotAllocatorOrIntegral<_Hash>,
770 typename = _RequireNotAllocator<_Pred>,
771 typename = _RequireAllocator<_Allocator>>
772 unordered_map(_InputIterator, _InputIterator,
773 typename unordered_map<int, int>::size_type = {},
774 _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator())
775 -> unordered_map<__iter_key_t<_InputIterator>,
776 __iter_val_t<_InputIterator>,
777 _Hash, _Pred, _Allocator>;
779 template<typename _Key, typename _Tp, typename _Hash = hash<_Key>,
780 typename _Pred = equal_to<_Key>,
781 typename _Allocator = allocator<pair<const _Key, _Tp>>,
782 typename = _RequireNotAllocatorOrIntegral<_Hash>,
783 typename = _RequireNotAllocator<_Pred>,
784 typename = _RequireAllocator<_Allocator>>
785 unordered_map(initializer_list<pair<_Key, _Tp>>,
786 typename unordered_map<int, int>::size_type = {},
787 _Hash = _Hash(), _Pred = _Pred(), _Allocator = _Allocator())
788 -> unordered_map<_Key, _Tp, _Hash, _Pred, _Allocator>;
790 template<typename _InputIterator, typename _Allocator,
791 typename = _RequireInputIter<_InputIterator>,
792 typename = _RequireAllocator<_Allocator>>
793 unordered_map(_InputIterator, _InputIterator,
794 typename unordered_map<int, int>::size_type, _Allocator)
795 -> unordered_map<__iter_key_t<_InputIterator>,
796 __iter_val_t<_InputIterator>,
797 hash<__iter_key_t<_InputIterator>>,
798 equal_to<__iter_key_t<_InputIterator>>,
801 template<typename _InputIterator, typename _Allocator,
802 typename = _RequireInputIter<_InputIterator>,
803 typename = _RequireAllocator<_Allocator>>
804 unordered_map(_InputIterator, _InputIterator, _Allocator)
805 -> unordered_map<__iter_key_t<_InputIterator>,
806 __iter_val_t<_InputIterator>,
807 hash<__iter_key_t<_InputIterator>>,
808 equal_to<__iter_key_t<_InputIterator>>,
811 template<typename _InputIterator, typename _Hash, typename _Allocator,
812 typename = _RequireInputIter<_InputIterator>,
813 typename = _RequireNotAllocatorOrIntegral<_Hash>,
814 typename = _RequireAllocator<_Allocator>>
815 unordered_map(_InputIterator, _InputIterator,
816 typename unordered_map<int, int>::size_type,
818 -> unordered_map<__iter_key_t<_InputIterator>,
819 __iter_val_t<_InputIterator>, _Hash,
820 equal_to<__iter_key_t<_InputIterator>>, _Allocator>;
822 template<typename _Key, typename _Tp, typename _Allocator,
823 typename = _RequireAllocator<_Allocator>>
824 unordered_map(initializer_list<pair<_Key, _Tp>>,
825 typename unordered_map<int, int>::size_type,
827 -> unordered_map<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>;
829 template<typename _Key, typename _Tp, typename _Allocator,
830 typename = _RequireAllocator<_Allocator>>
831 unordered_map(initializer_list<pair<_Key, _Tp>>, _Allocator)
832 -> unordered_map<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>;
834 template<typename _Key, typename _Tp, typename _Hash, typename _Allocator,
835 typename = _RequireNotAllocatorOrIntegral<_Hash>,
836 typename = _RequireAllocator<_Allocator>>
837 unordered_map(initializer_list<pair<_Key, _Tp>>,
838 typename unordered_map<int, int>::size_type,
840 -> unordered_map<_Key, _Tp, _Hash, equal_to<_Key>, _Allocator>;
844 template<typename _Key, typename _Tp, typename _Hash,
845 typename _Pred, typename _Alloc>
847 swap(unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
848 unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
849 noexcept(noexcept(__x.swap(__y)))
852 template<typename _Key, typename _Tp, typename _Hash,
853 typename _Pred, typename _Alloc>
855 operator==(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
856 const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
857 { return __x._M_base() == __y._M_base(); }
859 #if __cpp_impl_three_way_comparison < 201907L
860 template<typename _Key, typename _Tp, typename _Hash,
861 typename _Pred, typename _Alloc>
863 operator!=(const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
864 const unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
865 { return !(__x == __y); }
868 /// Class std::unordered_multimap with safety/checking/debug instrumentation.
869 template<typename _Key, typename _Tp,
870 typename _Hash = std::hash<_Key>,
871 typename _Pred = std::equal_to<_Key>,
872 typename _Alloc = std::allocator<std::pair<const _Key, _Tp> > >
873 class unordered_multimap
874 : public __gnu_debug::_Safe_container<
875 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>, _Alloc,
876 __gnu_debug::_Safe_unordered_container>,
877 public _GLIBCXX_STD_C::unordered_multimap<
878 _Key, _Tp, _Hash, _Pred, _Alloc>
880 typedef _GLIBCXX_STD_C::unordered_multimap<_Key, _Tp, _Hash,
881 _Pred, _Alloc> _Base;
882 typedef __gnu_debug::_Safe_container<unordered_multimap,
883 _Alloc, __gnu_debug::_Safe_unordered_container> _Safe;
884 typedef typename _Base::const_iterator _Base_const_iterator;
885 typedef typename _Base::iterator _Base_iterator;
886 typedef typename _Base::const_local_iterator _Base_const_local_iterator;
887 typedef typename _Base::local_iterator _Base_local_iterator;
889 template<typename _ItT, typename _SeqT, typename _CatT>
890 friend class ::__gnu_debug::_Safe_iterator;
891 template<typename _ItT, typename _SeqT>
892 friend class ::__gnu_debug::_Safe_local_iterator;
894 // Reference wrapper for base class. See PR libstdc++/90102.
897 _Base_ref(const _Base& __r) : _M_ref(__r) { }
903 typedef typename _Base::size_type size_type;
904 typedef typename _Base::hasher hasher;
905 typedef typename _Base::key_equal key_equal;
906 typedef typename _Base::allocator_type allocator_type;
908 typedef typename _Base::key_type key_type;
909 typedef typename _Base::value_type value_type;
910 typedef typename _Base::mapped_type mapped_type;
912 typedef typename _Base::pointer pointer;
913 typedef typename _Base::const_pointer const_pointer;
914 typedef typename _Base::reference reference;
915 typedef typename _Base::const_reference const_reference;
916 typedef __gnu_debug::_Safe_iterator<
917 _Base_iterator, unordered_multimap> iterator;
918 typedef __gnu_debug::_Safe_iterator<
919 _Base_const_iterator, unordered_multimap> const_iterator;
920 typedef __gnu_debug::_Safe_local_iterator<
921 _Base_local_iterator, unordered_multimap> local_iterator;
922 typedef __gnu_debug::_Safe_local_iterator<
923 _Base_const_local_iterator, unordered_multimap> const_local_iterator;
924 typedef typename _Base::difference_type difference_type;
926 unordered_multimap() = default;
929 unordered_multimap(size_type __n,
930 const hasher& __hf = hasher(),
931 const key_equal& __eql = key_equal(),
932 const allocator_type& __a = allocator_type())
933 : _Base(__n, __hf, __eql, __a) { }
935 template<typename _InputIterator>
936 unordered_multimap(_InputIterator __first, _InputIterator __last,
938 const hasher& __hf = hasher(),
939 const key_equal& __eql = key_equal(),
940 const allocator_type& __a = allocator_type())
941 : _Base(__gnu_debug::__base(
942 __glibcxx_check_valid_constructor_range(__first, __last)),
943 __gnu_debug::__base(__last), __n,
944 __hf, __eql, __a) { }
946 unordered_multimap(const unordered_multimap&) = default;
948 unordered_multimap(_Base_ref __x)
949 : _Base(__x._M_ref) { }
951 unordered_multimap(unordered_multimap&&) = default;
954 unordered_multimap(const allocator_type& __a)
957 unordered_multimap(const unordered_multimap& __umap,
958 const allocator_type& __a)
959 : _Base(__umap, __a) { }
961 unordered_multimap(unordered_multimap&& __umap,
962 const allocator_type& __a)
963 noexcept( noexcept(_Base(std::move(__umap), __a)) )
964 : _Safe(std::move(__umap), __a),
965 _Base(std::move(__umap), __a) { }
967 unordered_multimap(initializer_list<value_type> __l,
969 const hasher& __hf = hasher(),
970 const key_equal& __eql = key_equal(),
971 const allocator_type& __a = allocator_type())
972 : _Base(__l, __n, __hf, __eql, __a) { }
974 unordered_multimap(size_type __n, const allocator_type& __a)
975 : unordered_multimap(__n, hasher(), key_equal(), __a)
978 unordered_multimap(size_type __n, const hasher& __hf,
979 const allocator_type& __a)
980 : unordered_multimap(__n, __hf, key_equal(), __a)
983 template<typename _InputIterator>
984 unordered_multimap(_InputIterator __first, _InputIterator __last,
986 const allocator_type& __a)
987 : unordered_multimap(__first, __last, __n, hasher(), key_equal(), __a)
990 template<typename _InputIterator>
991 unordered_multimap(_InputIterator __first, _InputIterator __last,
992 size_type __n, const hasher& __hf,
993 const allocator_type& __a)
994 : unordered_multimap(__first, __last, __n, __hf, key_equal(), __a)
997 unordered_multimap(initializer_list<value_type> __l,
999 const allocator_type& __a)
1000 : unordered_multimap(__l, __n, hasher(), key_equal(), __a)
1003 unordered_multimap(initializer_list<value_type> __l,
1004 size_type __n, const hasher& __hf,
1005 const allocator_type& __a)
1006 : unordered_multimap(__l, __n, __hf, key_equal(), __a)
1009 ~unordered_multimap() = default;
1012 operator=(const unordered_multimap&) = default;
1015 operator=(unordered_multimap&&) = default;
1018 operator=(initializer_list<value_type> __l)
1020 _Base::operator=(__l);
1021 this->_M_invalidate_all();
1025 using _Base::get_allocator;
1028 using _Base::max_size;
1031 swap(unordered_multimap& __x)
1032 noexcept( noexcept(declval<_Base&>().swap(__x)) )
1034 _Safe::_M_swap(__x);
1042 this->_M_invalidate_all();
1047 { return { _Base::begin(), this }; }
1050 begin() const noexcept
1051 { return { _Base::begin(), this }; }
1055 { return { _Base::end(), this }; }
1058 end() const noexcept
1059 { return { _Base::end(), this }; }
1062 cbegin() const noexcept
1063 { return { _Base::cbegin(), this }; }
1066 cend() const noexcept
1067 { return { _Base::cend(), this }; }
1071 begin(size_type __b)
1073 __glibcxx_check_bucket_index(__b);
1074 return { _Base::begin(__b), this };
1080 __glibcxx_check_bucket_index(__b);
1081 return { _Base::end(__b), this };
1084 const_local_iterator
1085 begin(size_type __b) const
1087 __glibcxx_check_bucket_index(__b);
1088 return { _Base::begin(__b), this };
1091 const_local_iterator
1092 end(size_type __b) const
1094 __glibcxx_check_bucket_index(__b);
1095 return { _Base::end(__b), this };
1098 const_local_iterator
1099 cbegin(size_type __b) const
1101 __glibcxx_check_bucket_index(__b);
1102 return { _Base::cbegin(__b), this };
1105 const_local_iterator
1106 cend(size_type __b) const
1108 __glibcxx_check_bucket_index(__b);
1109 return { _Base::cend(__b), this };
1112 using _Base::bucket_count;
1113 using _Base::max_bucket_count;
1114 using _Base::bucket;
1117 bucket_size(size_type __b) const
1119 __glibcxx_check_bucket_index(__b);
1120 return _Base::bucket_size(__b);
1124 max_load_factor() const noexcept
1125 { return _Base::max_load_factor(); }
1128 max_load_factor(float __f)
1130 __glibcxx_check_max_load_factor(__f);
1131 _Base::max_load_factor(__f);
1134 template<typename... _Args>
1136 emplace(_Args&&... __args)
1138 size_type __bucket_count = this->bucket_count();
1139 auto __it = _Base::emplace(std::forward<_Args>(__args)...);
1140 _M_check_rehashed(__bucket_count);
1141 return { __it, this };
1144 template<typename... _Args>
1146 emplace_hint(const_iterator __hint, _Args&&... __args)
1148 __glibcxx_check_insert(__hint);
1149 size_type __bucket_count = this->bucket_count();
1150 auto __it = _Base::emplace_hint(__hint.base(),
1151 std::forward<_Args>(__args)...);
1152 _M_check_rehashed(__bucket_count);
1153 return { __it, this };
1157 insert(const value_type& __obj)
1159 size_type __bucket_count = this->bucket_count();
1160 auto __it = _Base::insert(__obj);
1161 _M_check_rehashed(__bucket_count);
1162 return { __it, this };
1165 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1166 // 2354. Unnecessary copying when inserting into maps with braced-init
1168 insert(value_type&& __x)
1170 size_type __bucket_count = this->bucket_count();
1171 auto __it = _Base::insert(std::move(__x));
1172 _M_check_rehashed(__bucket_count);
1173 return { __it, this };
1177 insert(const_iterator __hint, const value_type& __obj)
1179 __glibcxx_check_insert(__hint);
1180 size_type __bucket_count = this->bucket_count();
1181 auto __it = _Base::insert(__hint.base(), __obj);
1182 _M_check_rehashed(__bucket_count);
1183 return { __it, this };
1186 // _GLIBCXX_RESOLVE_LIB_DEFECTS
1187 // 2354. Unnecessary copying when inserting into maps with braced-init
1189 insert(const_iterator __hint, value_type&& __x)
1191 __glibcxx_check_insert(__hint);
1192 size_type __bucket_count = this->bucket_count();
1193 auto __it = _Base::insert(__hint.base(), std::move(__x));
1194 _M_check_rehashed(__bucket_count);
1195 return { __it, this };
1198 template<typename _Pair, typename = typename
1199 std::enable_if<std::is_constructible<value_type,
1200 _Pair&&>::value>::type>
1202 insert(_Pair&& __obj)
1204 size_type __bucket_count = this->bucket_count();
1205 auto __it = _Base::insert(std::forward<_Pair>(__obj));
1206 _M_check_rehashed(__bucket_count);
1207 return { __it, this };
1210 template<typename _Pair, typename = typename
1211 std::enable_if<std::is_constructible<value_type,
1212 _Pair&&>::value>::type>
1214 insert(const_iterator __hint, _Pair&& __obj)
1216 __glibcxx_check_insert(__hint);
1217 size_type __bucket_count = this->bucket_count();
1218 auto __it = _Base::insert(__hint.base(), std::forward<_Pair>(__obj));
1219 _M_check_rehashed(__bucket_count);
1220 return { __it, this };
1224 insert(std::initializer_list<value_type> __l)
1225 { _Base::insert(__l); }
1227 template<typename _InputIterator>
1229 insert(_InputIterator __first, _InputIterator __last)
1231 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
1232 __glibcxx_check_valid_range2(__first, __last, __dist);
1233 size_type __bucket_count = this->bucket_count();
1235 if (__dist.second >= __gnu_debug::__dp_sign)
1236 _Base::insert(__gnu_debug::__unsafe(__first),
1237 __gnu_debug::__unsafe(__last));
1239 _Base::insert(__first, __last);
1241 _M_check_rehashed(__bucket_count);
1244 #if __cplusplus > 201402L
1245 using node_type = typename _Base::node_type;
1248 extract(const_iterator __position)
1250 __glibcxx_check_erase(__position);
1251 return _M_extract(__position.base());
1255 extract(const key_type& __key)
1257 const auto __position = _Base::find(__key);
1258 if (__position != _Base::end())
1259 return _M_extract(__position);
1264 insert(node_type&& __nh)
1265 { return { _Base::insert(std::move(__nh)), this }; }
1268 insert(const_iterator __hint, node_type&& __nh)
1270 __glibcxx_check_insert(__hint);
1271 return { _Base::insert(__hint.base(), std::move(__nh)), this };
1274 template<typename _H2, typename _P2>
1276 merge(unordered_multimap<_Key, _Tp, _H2, _P2, _Alloc>& __source)
1279 = _Safe::_S_umc_guard(std::__detail::_Select1st{}, __source);
1280 _Base::merge(__source);
1283 template<typename _H2, typename _P2>
1285 merge(unordered_multimap<_Key, _Tp, _H2, _P2, _Alloc>&& __source)
1286 { merge(__source); }
1288 template<typename _H2, typename _P2>
1290 merge(unordered_map<_Key, _Tp, _H2, _P2, _Alloc>& __source)
1293 = _Safe::_S_uc_guard(std::__detail::_Select1st{}, __source);
1294 _Base::merge(__source);
1297 template<typename _H2, typename _P2>
1299 merge(unordered_map<_Key, _Tp, _H2, _P2, _Alloc>&& __source)
1300 { merge(__source); }
1303 using _Base::hash_function;
1304 using _Base::key_eq;
1307 find(const key_type& __key)
1308 { return { _Base::find(__key), this }; }
1310 #if __cplusplus > 201703L
1311 template<typename _Kt,
1312 typename = std::__has_is_transparent_t<_Hash, _Kt>,
1313 typename = std::__has_is_transparent_t<_Pred, _Kt>>
1315 find(const _Kt& __k)
1316 { return { _Base::find(__k), this }; }
1320 find(const key_type& __key) const
1321 { return { _Base::find(__key), this }; }
1323 #if __cplusplus > 201703L
1324 template<typename _Kt,
1325 typename = std::__has_is_transparent_t<_Hash, _Kt>,
1326 typename = std::__has_is_transparent_t<_Pred, _Kt>>
1328 find(const _Kt& __k) const
1329 { return { _Base::find(__k), this }; }
1333 #if __cplusplus > 201703L
1334 using _Base::contains;
1337 std::pair<iterator, iterator>
1338 equal_range(const key_type& __key)
1340 auto __res = _Base::equal_range(__key);
1341 return { { __res.first, this }, { __res.second, this } };
1344 #if __cplusplus > 201703L
1345 template<typename _Kt,
1346 typename = std::__has_is_transparent_t<_Hash, _Kt>,
1347 typename = std::__has_is_transparent_t<_Pred, _Kt>>
1348 std::pair<iterator, iterator>
1349 equal_range(const _Kt& __k)
1351 auto __res = _Base::equal_range(__k);
1352 return { { __res.first, this }, { __res.second, this } };
1356 std::pair<const_iterator, const_iterator>
1357 equal_range(const key_type& __key) const
1359 auto __res = _Base::equal_range(__key);
1360 return { { __res.first, this }, { __res.second, this } };
1363 #if __cplusplus > 201703L
1364 template<typename _Kt,
1365 typename = std::__has_is_transparent_t<_Hash, _Kt>,
1366 typename = std::__has_is_transparent_t<_Pred, _Kt>>
1367 std::pair<const_iterator, const_iterator>
1368 equal_range(const _Kt& __k) const
1370 auto __res = _Base::equal_range(__k);
1371 return { { __res.first, this }, { __res.second, this } };
1376 erase(const key_type& __key)
1379 size_type __bucket_count = this->bucket_count();
1380 auto __pair = _Base::equal_range(__key);
1381 for (auto __victim = __pair.first; __victim != __pair.second;)
1383 _M_invalidate(__victim);
1384 __victim = _Base::erase(__victim);
1388 _M_check_rehashed(__bucket_count);
1393 erase(const_iterator __it)
1395 __glibcxx_check_erase(__it);
1396 return { _M_erase(__it.base()), this };
1400 erase(_Base_const_iterator __it)
1402 __glibcxx_check_erase2(__it);
1403 return _M_erase(__it);
1407 erase(iterator __it)
1409 __glibcxx_check_erase(__it);
1410 return { _M_erase(__it.base()), this };
1414 erase(const_iterator __first, const_iterator __last)
1416 __glibcxx_check_erase_range(__first, __last);
1417 for (auto __tmp = __first.base(); __tmp != __last.base(); ++__tmp)
1419 _GLIBCXX_DEBUG_VERIFY(__tmp != _Base::cend(),
1420 _M_message(__gnu_debug::__msg_valid_range)
1421 ._M_iterator(__first, "first")
1422 ._M_iterator(__last, "last"));
1423 _M_invalidate(__tmp);
1426 size_type __bucket_count = this->bucket_count();
1427 auto __next = _Base::erase(__first.base(), __last.base());
1428 _M_check_rehashed(__bucket_count);
1429 return { __next, this };
1432 using _Base::rehash;
1433 using _Base::reserve;
1436 _M_base() noexcept { return *this; }
1439 _M_base() const noexcept { return *this; }
1443 _M_check_rehashed(size_type __prev_count)
1445 if (__prev_count != this->bucket_count())
1446 this->_M_invalidate_all();
1450 _M_invalidate(_Base_const_iterator __victim)
1452 this->_M_invalidate_if(
1453 [__victim](_Base_const_iterator __it) { return __it == __victim; });
1454 this->_M_invalidate_local_if(
1455 [__victim](_Base_const_local_iterator __it)
1456 { return __it == __victim; });
1460 _M_erase(_Base_const_iterator __victim)
1462 _M_invalidate(__victim);
1463 size_type __bucket_count = this->bucket_count();
1464 _Base_iterator __next = _Base::erase(__victim);
1465 _M_check_rehashed(__bucket_count);
1469 #if __cplusplus > 201402L
1471 _M_extract(_Base_const_iterator __victim)
1473 _M_invalidate(__victim);
1474 return _Base::extract(__victim);
1479 #if __cpp_deduction_guides >= 201606
1481 template<typename _InputIterator,
1482 typename _Hash = hash<__iter_key_t<_InputIterator>>,
1483 typename _Pred = equal_to<__iter_key_t<_InputIterator>>,
1484 typename _Allocator = allocator<__iter_to_alloc_t<_InputIterator>>,
1485 typename = _RequireInputIter<_InputIterator>,
1486 typename = _RequireNotAllocatorOrIntegral<_Hash>,
1487 typename = _RequireNotAllocator<_Pred>,
1488 typename = _RequireAllocator<_Allocator>>
1489 unordered_multimap(_InputIterator, _InputIterator,
1490 unordered_multimap<int, int>::size_type = {},
1491 _Hash = _Hash(), _Pred = _Pred(),
1492 _Allocator = _Allocator())
1493 -> unordered_multimap<__iter_key_t<_InputIterator>,
1494 __iter_val_t<_InputIterator>, _Hash, _Pred,
1497 template<typename _Key, typename _Tp, typename _Hash = hash<_Key>,
1498 typename _Pred = equal_to<_Key>,
1499 typename _Allocator = allocator<pair<const _Key, _Tp>>,
1500 typename = _RequireNotAllocatorOrIntegral<_Hash>,
1501 typename = _RequireNotAllocator<_Pred>,
1502 typename = _RequireAllocator<_Allocator>>
1503 unordered_multimap(initializer_list<pair<_Key, _Tp>>,
1504 unordered_multimap<int, int>::size_type = {},
1505 _Hash = _Hash(), _Pred = _Pred(),
1506 _Allocator = _Allocator())
1507 -> unordered_multimap<_Key, _Tp, _Hash, _Pred, _Allocator>;
1509 template<typename _InputIterator, typename _Allocator,
1510 typename = _RequireInputIter<_InputIterator>,
1511 typename = _RequireAllocator<_Allocator>>
1512 unordered_multimap(_InputIterator, _InputIterator,
1513 unordered_multimap<int, int>::size_type, _Allocator)
1514 -> unordered_multimap<__iter_key_t<_InputIterator>,
1515 __iter_val_t<_InputIterator>,
1516 hash<__iter_key_t<_InputIterator>>,
1517 equal_to<__iter_key_t<_InputIterator>>, _Allocator>;
1519 template<typename _InputIterator, typename _Allocator,
1520 typename = _RequireInputIter<_InputIterator>,
1521 typename = _RequireAllocator<_Allocator>>
1522 unordered_multimap(_InputIterator, _InputIterator, _Allocator)
1523 -> unordered_multimap<__iter_key_t<_InputIterator>,
1524 __iter_val_t<_InputIterator>,
1525 hash<__iter_key_t<_InputIterator>>,
1526 equal_to<__iter_key_t<_InputIterator>>, _Allocator>;
1528 template<typename _InputIterator, typename _Hash, typename _Allocator,
1529 typename = _RequireInputIter<_InputIterator>,
1530 typename = _RequireNotAllocatorOrIntegral<_Hash>,
1531 typename = _RequireAllocator<_Allocator>>
1532 unordered_multimap(_InputIterator, _InputIterator,
1533 unordered_multimap<int, int>::size_type, _Hash,
1535 -> unordered_multimap<__iter_key_t<_InputIterator>,
1536 __iter_val_t<_InputIterator>, _Hash,
1537 equal_to<__iter_key_t<_InputIterator>>, _Allocator>;
1539 template<typename _Key, typename _Tp, typename _Allocator,
1540 typename = _RequireAllocator<_Allocator>>
1541 unordered_multimap(initializer_list<pair<_Key, _Tp>>,
1542 unordered_multimap<int, int>::size_type,
1544 -> unordered_multimap<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>;
1546 template<typename _Key, typename _Tp, typename _Allocator,
1547 typename = _RequireAllocator<_Allocator>>
1548 unordered_multimap(initializer_list<pair<_Key, _Tp>>, _Allocator)
1549 -> unordered_multimap<_Key, _Tp, hash<_Key>, equal_to<_Key>, _Allocator>;
1551 template<typename _Key, typename _Tp, typename _Hash, typename _Allocator,
1552 typename = _RequireNotAllocatorOrIntegral<_Hash>,
1553 typename = _RequireAllocator<_Allocator>>
1554 unordered_multimap(initializer_list<pair<_Key, _Tp>>,
1555 unordered_multimap<int, int>::size_type,
1557 -> unordered_multimap<_Key, _Tp, _Hash, equal_to<_Key>, _Allocator>;
1561 template<typename _Key, typename _Tp, typename _Hash,
1562 typename _Pred, typename _Alloc>
1564 swap(unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
1565 unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
1566 noexcept(noexcept(__x.swap(__y)))
1569 template<typename _Key, typename _Tp, typename _Hash,
1570 typename _Pred, typename _Alloc>
1572 operator==(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
1573 const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
1574 { return __x._M_base() == __y._M_base(); }
1576 #if __cpp_impl_three_way_comparison < 201907L
1577 template<typename _Key, typename _Tp, typename _Hash,
1578 typename _Pred, typename _Alloc>
1580 operator!=(const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __x,
1581 const unordered_multimap<_Key, _Tp, _Hash, _Pred, _Alloc>& __y)
1582 { return !(__x == __y); }
1585 } // namespace __debug