1 // Debugging map implementation -*- C++ -*-
2
3 // Copyright (C) 2003-2023 Free Software Foundation, Inc.
4 //
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)
9 // any later version.
10
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.
15
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.
19
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/>.
24
25 /** @file debug/map.h
26 * This file is a GNU debug extension to the Standard C++ Library.
27 */
28
29 #ifndef _GLIBCXX_DEBUG_MAP_H
30 #define _GLIBCXX_DEBUG_MAP_H 1
31
32 #include <debug/safe_sequence.h>
33 #include <debug/safe_container.h>
34 #include <debug/safe_iterator.h>
35 #include <bits/stl_pair.h>
36
37 namespace std _GLIBCXX_VISIBILITY(default)
38 {
39 namespace __debug
40 {
41 /// Class std::map with safety/checking/debug instrumentation.
42 template<typename _Key, typename _Tp, typename _Compare = std::less<_Key>,
43 typename _Allocator = std::allocator<std::pair<const _Key, _Tp> > >
44 class map
45 : public __gnu_debug::_Safe_container<
46 map<_Key, _Tp, _Compare, _Allocator>, _Allocator,
47 __gnu_debug::_Safe_node_sequence>,
48 public _GLIBCXX_STD_C::map<_Key, _Tp, _Compare, _Allocator>
49 {
50 typedef _GLIBCXX_STD_C::map<
51 _Key, _Tp, _Compare, _Allocator> _Base;
52 typedef __gnu_debug::_Safe_container<
53 map, _Allocator, __gnu_debug::_Safe_node_sequence> _Safe;
54
55 typedef typename _Base::const_iterator _Base_const_iterator;
56 typedef typename _Base::iterator _Base_iterator;
57 typedef __gnu_debug::_Equal_to<_Base_const_iterator> _Equal;
58
59 template<typename _ItT, typename _SeqT, typename _CatT>
60 friend class ::__gnu_debug::_Safe_iterator;
61
62 // Reference wrapper for base class. Disambiguates map(const _Base&)
63 // from copy constructor by requiring a user-defined conversion.
64 // See PR libstdc++/90102.
65 struct _Base_ref
66 {
67 _Base_ref(const _Base& __r) : _M_ref(__r) { }
68
69 const _Base& _M_ref;
70 };
71
72 public:
73 // types:
74 typedef _Key key_type;
75 typedef _Tp mapped_type;
76 typedef std::pair<const _Key, _Tp> value_type;
77 typedef _Compare key_compare;
78 typedef _Allocator allocator_type;
79 typedef typename _Base::reference reference;
80 typedef typename _Base::const_reference const_reference;
81
82 typedef __gnu_debug::_Safe_iterator<_Base_iterator, map>
83 iterator;
84 typedef __gnu_debug::_Safe_iterator<_Base_const_iterator, map>
85 const_iterator;
86
87 typedef typename _Base::size_type size_type;
88 typedef typename _Base::difference_type difference_type;
89 typedef typename _Base::pointer pointer;
90 typedef typename _Base::const_pointer const_pointer;
91 typedef std::reverse_iterator<iterator> reverse_iterator;
92 typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
93
94 // 23.3.1.1 construct/copy/destroy:
95
96 #if __cplusplus < 201103L
97 map() : _Base() { }
98
99 map(const map& __x)
100 : _Base(__x) { }
101
102 ~map() { }
103 #else
104 map() = default;
105 map(const map&) = default;
106 map(map&&) = default;
107
108 map(initializer_list<value_type> __l,
109 const _Compare& __c = _Compare(),
110 const allocator_type& __a = allocator_type())
111 : _Base(__l, __c, __a) { }
112
113 explicit
114 map(const allocator_type& __a)
115 : _Base(__a) { }
116
117 map(const map& __m, const __type_identity_t<allocator_type>& __a)
118 : _Base(__m, __a) { }
119
120 map(map&& __m, const __type_identity_t<allocator_type>& __a)
121 noexcept( noexcept(_Base(std::move(__m), __a)) )
122 : _Safe(std::move(__m), __a),
123 _Base(std::move(__m), __a) { }
124
125 map(initializer_list<value_type> __l, const allocator_type& __a)
126 : _Base(__l, __a) { }
127
128 template<typename _InputIterator>
129 map(_InputIterator __first, _InputIterator __last,
130 const allocator_type& __a)
131 : _Base(__gnu_debug::__base(
132 __glibcxx_check_valid_constructor_range(__first, __last)),
133 __gnu_debug::__base(__last), __a)
134 { }
135
136 ~map() = default;
137 #endif
138
139 map(_Base_ref __x)
140 : _Base(__x._M_ref) { }
141
142 explicit map(const _Compare& __comp,
143 const _Allocator& __a = _Allocator())
144 : _Base(__comp, __a) { }
145
146 template<typename _InputIterator>
147 map(_InputIterator __first, _InputIterator __last,
148 const _Compare& __comp = _Compare(),
149 const _Allocator& __a = _Allocator())
150 : _Base(__gnu_debug::__base(
151 __glibcxx_check_valid_constructor_range(__first, __last)),
152 __gnu_debug::__base(__last),
153 __comp, __a) { }
154
155 #if __cplusplus >= 201103L
156 map&
157 operator=(const map&) = default;
158
159 map&
160 operator=(map&&) = default;
161
162 map&
163 operator=(initializer_list<value_type> __l)
164 {
165 _Base::operator=(__l);
166 this->_M_invalidate_all();
167 return *this;
168 }
169 #endif
170
171 // _GLIBCXX_RESOLVE_LIB_DEFECTS
172 // 133. map missing get_allocator()
173 using _Base::get_allocator;
174
175 // iterators:
176 iterator
177 begin() _GLIBCXX_NOEXCEPT
178 { return iterator(_Base::begin(), this); }
179
180 const_iterator
181 begin() const _GLIBCXX_NOEXCEPT
182 { return const_iterator(_Base::begin(), this); }
183
184 iterator
185 end() _GLIBCXX_NOEXCEPT
186 { return iterator(_Base::end(), this); }
187
188 const_iterator
189 end() const _GLIBCXX_NOEXCEPT
190 { return const_iterator(_Base::end(), this); }
191
192 reverse_iterator
193 rbegin() _GLIBCXX_NOEXCEPT
194 { return reverse_iterator(end()); }
195
196 const_reverse_iterator
197 rbegin() const _GLIBCXX_NOEXCEPT
198 { return const_reverse_iterator(end()); }
199
200 reverse_iterator
201 rend() _GLIBCXX_NOEXCEPT
202 { return reverse_iterator(begin()); }
203
204 const_reverse_iterator
205 rend() const _GLIBCXX_NOEXCEPT
206 { return const_reverse_iterator(begin()); }
207
208 #if __cplusplus >= 201103L
209 const_iterator
210 cbegin() const noexcept
211 { return const_iterator(_Base::begin(), this); }
212
213 const_iterator
214 cend() const noexcept
215 { return const_iterator(_Base::end(), this); }
216
217 const_reverse_iterator
218 crbegin() const noexcept
219 { return const_reverse_iterator(end()); }
220
221 const_reverse_iterator
222 crend() const noexcept
223 { return const_reverse_iterator(begin()); }
224 #endif
225
226 // capacity:
227 using _Base::empty;
228 using _Base::size;
229 using _Base::max_size;
230
231 // 23.3.1.2 element access:
232 using _Base::operator[];
233
234 // _GLIBCXX_RESOLVE_LIB_DEFECTS
235 // DR 464. Suggestion for new member functions in standard containers.
236 using _Base::at;
237
238 // modifiers:
239 #if __cplusplus >= 201103L
240 template<typename... _Args>
241 std::pair<iterator, bool>
242 emplace(_Args&&... __args)
243 {
244 auto __res = _Base::emplace(std::forward<_Args>(__args)...);
245 return { { __res.first, this }, __res.second };
246 }
247
248 template<typename... _Args>
249 iterator
250 emplace_hint(const_iterator __pos, _Args&&... __args)
251 {
252 __glibcxx_check_insert(__pos);
253 return
254 {
255 _Base::emplace_hint(__pos.base(), std::forward<_Args>(__args)...),
256 this
257 };
258 }
259 #endif
260
261 std::pair<iterator, bool>
262 insert(const value_type& __x)
263 {
264 std::pair<_Base_iterator, bool> __res = _Base::insert(__x);
265 return std::pair<iterator, bool>(iterator(__res.first, this),
266 __res.second);
267 }
268
269 #if __cplusplus >= 201103L
270 // _GLIBCXX_RESOLVE_LIB_DEFECTS
271 // 2354. Unnecessary copying when inserting into maps with braced-init
272 std::pair<iterator, bool>
273 insert(value_type&& __x)
274 {
275 auto __res = _Base::insert(std::move(__x));
276 return { { __res.first, this }, __res.second };
277 }
278
279 template<typename _Pair, typename = typename
280 std::enable_if<std::is_constructible<value_type,
281 _Pair&&>::value>::type>
282 std::pair<iterator, bool>
283 insert(_Pair&& __x)
284 {
285 auto __res = _Base::insert(std::forward<_Pair>(__x));
286 return { { __res.first, this }, __res.second };
287 }
288 #endif
289
290 #if __cplusplus >= 201103L
291 void
292 insert(std::initializer_list<value_type> __list)
293 { _Base::insert(__list); }
294 #endif
295
296 iterator
297 #if __cplusplus >= 201103L
298 insert(const_iterator __position, const value_type& __x)
299 #else
300 insert(iterator __position, const value_type& __x)
301 #endif
302 {
303 __glibcxx_check_insert(__position);
304 return iterator(_Base::insert(__position.base(), __x), this);
305 }
306
307 #if __cplusplus >= 201103L
308 // _GLIBCXX_RESOLVE_LIB_DEFECTS
309 // 2354. Unnecessary copying when inserting into maps with braced-init
310 iterator
311 insert(const_iterator __position, value_type&& __x)
312 {
313 __glibcxx_check_insert(__position);
314 return { _Base::insert(__position.base(), std::move(__x)), this };
315 }
316
317 template<typename _Pair, typename = typename
318 std::enable_if<std::is_constructible<value_type,
319 _Pair&&>::value>::type>
320 iterator
321 insert(const_iterator __position, _Pair&& __x)
322 {
323 __glibcxx_check_insert(__position);
324 return
325 {
326 _Base::insert(__position.base(), std::forward<_Pair>(__x)),
327 this
328 };
329 }
330 #endif
331
332 template<typename _InputIterator>
333 void
334 insert(_InputIterator __first, _InputIterator __last)
335 {
336 typename __gnu_debug::_Distance_traits<_InputIterator>::__type __dist;
337 __glibcxx_check_valid_range2(__first, __last, __dist);
338
339 if (__dist.second >= __gnu_debug::__dp_sign)
340 _Base::insert(__gnu_debug::__unsafe(__first),
341 __gnu_debug::__unsafe(__last));
342 else
343 _Base::insert(__first, __last);
344 }
345
346
347 #if __cplusplus > 201402L
348 template <typename... _Args>
349 pair<iterator, bool>
350 try_emplace(const key_type& __k, _Args&&... __args)
351 {
352 auto __res = _Base::try_emplace(__k,
353 std::forward<_Args>(__args)...);
354 return { { __res.first, this }, __res.second };
355 }
356
357 template <typename... _Args>
358 pair<iterator, bool>
359 try_emplace(key_type&& __k, _Args&&... __args)
360 {
361 auto __res = _Base::try_emplace(std::move(__k),
362 std::forward<_Args>(__args)...);
363 return { { __res.first, this }, __res.second };
364 }
365
366 template <typename... _Args>
367 iterator
368 try_emplace(const_iterator __hint, const key_type& __k,
369 _Args&&... __args)
370 {
371 __glibcxx_check_insert(__hint);
372 return
373 {
374 _Base::try_emplace(__hint.base(), __k,
375 std::forward<_Args>(__args)...),
376 this
377 };
378 }
379
380 template <typename... _Args>
381 iterator
382 try_emplace(const_iterator __hint, key_type&& __k, _Args&&... __args)
383 {
384 __glibcxx_check_insert(__hint);
385 return
386 {
387 _Base::try_emplace(__hint.base(), std::move(__k),
388 std::forward<_Args>(__args)...),
389 this
390 };
391 }
392
393 template <typename _Obj>
394 std::pair<iterator, bool>
395 insert_or_assign(const key_type& __k, _Obj&& __obj)
396 {
397 auto __res = _Base::insert_or_assign(__k,
398 std::forward<_Obj>(__obj));
399 return { { __res.first, this }, __res.second };
400 }
401
402 template <typename _Obj>
403 std::pair<iterator, bool>
404 insert_or_assign(key_type&& __k, _Obj&& __obj)
405 {
406 auto __res = _Base::insert_or_assign(std::move(__k),
407 std::forward<_Obj>(__obj));
408 return { { __res.first, this }, __res.second };
409 }
410
411 template <typename _Obj>
412 iterator
413 insert_or_assign(const_iterator __hint,
414 const key_type& __k, _Obj&& __obj)
415 {
416 __glibcxx_check_insert(__hint);
417 return
418 {
419 _Base::insert_or_assign(__hint.base(), __k,
420 std::forward<_Obj>(__obj)),
421 this
422 };
423 }
424
425 template <typename _Obj>
426 iterator
427 insert_or_assign(const_iterator __hint, key_type&& __k, _Obj&& __obj)
428 {
429 __glibcxx_check_insert(__hint);
430 return
431 {
432 _Base::insert_or_assign(__hint.base(), std::move(__k),
433 std::forward<_Obj>(__obj)),
434 this
435 };
436 }
437 #endif // C++17
438
439 #if __cplusplus > 201402L
440 using node_type = typename _Base::node_type;
441 using insert_return_type = _Node_insert_return<iterator, node_type>;
442
443 node_type
444 extract(const_iterator __position)
445 {
446 __glibcxx_check_erase(__position);
447 this->_M_invalidate_if(_Equal(__position.base()));
448 return _Base::extract(__position.base());
449 }
450
451 node_type
452 extract(const key_type& __key)
453 {
454 const auto __position = find(__key);
455 if (__position != end())
456 return extract(__position);
457 return {};
458 }
459
460 insert_return_type
461 insert(node_type&& __nh)
462 {
463 auto __ret = _Base::insert(std::move(__nh));
464 return
465 { { __ret.position, this }, __ret.inserted, std::move(__ret.node) };
466 }
467
468 iterator
469 insert(const_iterator __hint, node_type&& __nh)
470 {
471 __glibcxx_check_insert(__hint);
472 return { _Base::insert(__hint.base(), std::move(__nh)), this };
473 }
474
475 using _Base::merge;
476 #endif // C++17
477
478 #if __cplusplus >= 201103L
479 iterator
480 erase(const_iterator __position)
481 {
482 __glibcxx_check_erase(__position);
483 return { erase(__position.base()), this };
484 }
485
486 _Base_iterator
487 erase(_Base_const_iterator __position)
488 {
489 __glibcxx_check_erase2(__position);
490 this->_M_invalidate_if(_Equal(__position));
491 return _Base::erase(__position);
492 }
493
494 _GLIBCXX_ABI_TAG_CXX11
495 iterator
496 erase(iterator __position)
497 { return erase(const_iterator(__position)); }
498 #else
499 void
500 erase(iterator __position)
501 {
502 __glibcxx_check_erase(__position);
503 this->_M_invalidate_if(_Equal(__position.base()));
504 _Base::erase(__position.base());
505 }
506 #endif
507
508 size_type
509 erase(const key_type& __x)
510 {
511 _Base_iterator __victim = _Base::find(__x);
512 if (__victim == _Base::end())
513 return 0;
514 else
515 {
516 this->_M_invalidate_if(_Equal(__victim));
517 _Base::erase(__victim);
518 return 1;
519 }
520 }
521
522 #if __cplusplus >= 201103L
523 iterator
524 erase(const_iterator __first, const_iterator __last)
525 {
526 // _GLIBCXX_RESOLVE_LIB_DEFECTS
527 // 151. can't currently clear() empty container
528 __glibcxx_check_erase_range(__first, __last);
529 for (_Base_const_iterator __victim = __first.base();
530 __victim != __last.base(); ++__victim)
531 {
532 _GLIBCXX_DEBUG_VERIFY(__victim != _Base::cend(),
533 _M_message(__gnu_debug::__msg_valid_range)
534 ._M_iterator(__first, "first")
535 ._M_iterator(__last, "last"));
536 this->_M_invalidate_if(_Equal(__victim));
537 }
538
539 return { _Base::erase(__first.base(), __last.base()), this };
540 }
541 #else
542 void
543 erase(iterator __first, iterator __last)
544 {
545 // _GLIBCXX_RESOLVE_LIB_DEFECTS
546 // 151. can't currently clear() empty container
547 __glibcxx_check_erase_range(__first, __last);
548 for (_Base_iterator __victim = __first.base();
549 __victim != __last.base(); ++__victim)
550 {
551 _GLIBCXX_DEBUG_VERIFY(__victim != _Base::end(),
552 _M_message(__gnu_debug::__msg_valid_range)
553 ._M_iterator(__first, "first")
554 ._M_iterator(__last, "last"));
555 this->_M_invalidate_if(_Equal(__victim));
556 }
557 _Base::erase(__first.base(), __last.base());
558 }
559 #endif
560
561 void
562 swap(map& __x)
563 _GLIBCXX_NOEXCEPT_IF( noexcept(declval<_Base&>().swap(__x)) )
564 {
565 _Safe::_M_swap(__x);
566 _Base::swap(__x);
567 }
568
569 void
570 clear() _GLIBCXX_NOEXCEPT
571 {
572 this->_M_invalidate_all();
573 _Base::clear();
574 }
575
576 // observers:
577 using _Base::key_comp;
578 using _Base::value_comp;
579
580 // 23.3.1.3 map operations:
581 iterator
582 find(const key_type& __x)
583 { return iterator(_Base::find(__x), this); }
584
585 #if __cplusplus > 201103L
586 template<typename _Kt,
587 typename _Req =
588 typename __has_is_transparent<_Compare, _Kt>::type>
589 iterator
590 find(const _Kt& __x)
591 { return { _Base::find(__x), this }; }
592 #endif
593
594 const_iterator
595 find(const key_type& __x) const
596 { return const_iterator(_Base::find(__x), this); }
597
598 #if __cplusplus > 201103L
599 template<typename _Kt,
600 typename _Req =
601 typename __has_is_transparent<_Compare, _Kt>::type>
602 const_iterator
603 find(const _Kt& __x) const
604 { return { _Base::find(__x), this }; }
605 #endif
606
607 using _Base::count;
608
609 iterator
610 lower_bound(const key_type& __x)
611 { return iterator(_Base::lower_bound(__x), this); }
612
613 #if __cplusplus > 201103L
614 template<typename _Kt,
615 typename _Req =
616 typename __has_is_transparent<_Compare, _Kt>::type>
617 iterator
618 lower_bound(const _Kt& __x)
619 { return { _Base::lower_bound(__x), this }; }
620 #endif
621
622 const_iterator
623 lower_bound(const key_type& __x) const
624 { return const_iterator(_Base::lower_bound(__x), this); }
625
626 #if __cplusplus > 201103L
627 template<typename _Kt,
628 typename _Req =
629 typename __has_is_transparent<_Compare, _Kt>::type>
630 const_iterator
631 lower_bound(const _Kt& __x) const
632 { return { _Base::lower_bound(__x), this }; }
633 #endif
634
635 iterator
636 upper_bound(const key_type& __x)
637 { return iterator(_Base::upper_bound(__x), this); }
638
639 #if __cplusplus > 201103L
640 template<typename _Kt,
641 typename _Req =
642 typename __has_is_transparent<_Compare, _Kt>::type>
643 iterator
644 upper_bound(const _Kt& __x)
645 { return { _Base::upper_bound(__x), this }; }
646 #endif
647
648 const_iterator
649 upper_bound(const key_type& __x) const
650 { return const_iterator(_Base::upper_bound(__x), this); }
651
652 #if __cplusplus > 201103L
653 template<typename _Kt,
654 typename _Req =
655 typename __has_is_transparent<_Compare, _Kt>::type>
656 const_iterator
657 upper_bound(const _Kt& __x) const
658 { return { _Base::upper_bound(__x), this }; }
659 #endif
660
661 std::pair<iterator,iterator>
662 equal_range(const key_type& __x)
663 {
664 std::pair<_Base_iterator, _Base_iterator> __res =
665 _Base::equal_range(__x);
666 return std::make_pair(iterator(__res.first, this),
667 iterator(__res.second, this));
668 }
669
670 #if __cplusplus > 201103L
671 template<typename _Kt,
672 typename _Req =
673 typename __has_is_transparent<_Compare, _Kt>::type>
674 std::pair<iterator, iterator>
675 equal_range(const _Kt& __x)
676 {
677 auto __res = _Base::equal_range(__x);
678 return { { __res.first, this }, { __res.second, this } };
679 }
680 #endif
681
682 std::pair<const_iterator,const_iterator>
683 equal_range(const key_type& __x) const
684 {
685 std::pair<_Base_const_iterator, _Base_const_iterator> __res =
686 _Base::equal_range(__x);
687 return std::make_pair(const_iterator(__res.first, this),
688 const_iterator(__res.second, this));
689 }
690
691 #if __cplusplus > 201103L
692 template<typename _Kt,
693 typename _Req =
694 typename __has_is_transparent<_Compare, _Kt>::type>
695 std::pair<const_iterator, const_iterator>
696 equal_range(const _Kt& __x) const
697 {
698 auto __res = _Base::equal_range(__x);
699 return { { __res.first, this }, { __res.second, this } };
700 }
701 #endif
702
703 _Base&
704 _M_base() _GLIBCXX_NOEXCEPT { return *this; }
705
706 const _Base&
707 _M_base() const _GLIBCXX_NOEXCEPT { return *this; }
708 };
709
710 #if __cpp_deduction_guides >= 201606
711
712 template<typename _InputIterator,
713 typename _Compare = less<__iter_key_t<_InputIterator>>,
714 typename _Allocator = allocator<__iter_to_alloc_t<_InputIterator>>,
715 typename = _RequireInputIter<_InputIterator>,
716 typename = _RequireNotAllocator<_Compare>,
717 typename = _RequireAllocator<_Allocator>>
718 map(_InputIterator, _InputIterator,
719 _Compare = _Compare(), _Allocator = _Allocator())
720 -> map<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>,
721 _Compare, _Allocator>;
722
723 template<typename _Key, typename _Tp, typename _Compare = less<_Key>,
724 typename _Allocator = allocator<pair<const _Key, _Tp>>,
725 typename = _RequireNotAllocator<_Compare>,
726 typename = _RequireAllocator<_Allocator>>
727 map(initializer_list<pair<_Key, _Tp>>,
728 _Compare = _Compare(), _Allocator = _Allocator())
729 -> map<_Key, _Tp, _Compare, _Allocator>;
730
731 template <typename _InputIterator, typename _Allocator,
732 typename = _RequireInputIter<_InputIterator>,
733 typename = _RequireAllocator<_Allocator>>
734 map(_InputIterator, _InputIterator, _Allocator)
735 -> map<__iter_key_t<_InputIterator>, __iter_val_t<_InputIterator>,
736 less<__iter_key_t<_InputIterator>>, _Allocator>;
737
738 template<typename _Key, typename _Tp, typename _Allocator,
739 typename = _RequireAllocator<_Allocator>>
740 map(initializer_list<pair<_Key, _Tp>>, _Allocator)
741 -> map<_Key, _Tp, less<_Key>, _Allocator>;
742
743 #endif // deduction guides
744
745 template<typename _Key, typename _Tp,
746 typename _Compare, typename _Allocator>
747 inline bool
748 operator==(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
749 const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
750 { return __lhs._M_base() == __rhs._M_base(); }
751
752 #if __cpp_lib_three_way_comparison
753 template<typename _Key, typename _Tp, typename _Compare, typename _Alloc>
754 inline __detail::__synth3way_t<pair<const _Key, _Tp>>
755 operator<=>(const map<_Key, _Tp, _Compare, _Alloc>& __lhs,
756 const map<_Key, _Tp, _Compare, _Alloc>& __rhs)
757 { return __lhs._M_base() <=> __rhs._M_base(); }
758 #else
759 template<typename _Key, typename _Tp,
760 typename _Compare, typename _Allocator>
761 inline bool
762 operator!=(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
763 const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
764 { return __lhs._M_base() != __rhs._M_base(); }
765
766 template<typename _Key, typename _Tp,
767 typename _Compare, typename _Allocator>
768 inline bool
769 operator<(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
770 const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
771 { return __lhs._M_base() < __rhs._M_base(); }
772
773 template<typename _Key, typename _Tp,
774 typename _Compare, typename _Allocator>
775 inline bool
776 operator<=(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
777 const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
778 { return __lhs._M_base() <= __rhs._M_base(); }
779
780 template<typename _Key, typename _Tp,
781 typename _Compare, typename _Allocator>
782 inline bool
783 operator>=(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
784 const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
785 { return __lhs._M_base() >= __rhs._M_base(); }
786
787 template<typename _Key, typename _Tp,
788 typename _Compare, typename _Allocator>
789 inline bool
790 operator>(const map<_Key, _Tp, _Compare, _Allocator>& __lhs,
791 const map<_Key, _Tp, _Compare, _Allocator>& __rhs)
792 { return __lhs._M_base() > __rhs._M_base(); }
793 #endif // three-way comparison
794
795 template<typename _Key, typename _Tp,
796 typename _Compare, typename _Allocator>
797 inline void
798 swap(map<_Key, _Tp, _Compare, _Allocator>& __lhs,
799 map<_Key, _Tp, _Compare, _Allocator>& __rhs)
800 _GLIBCXX_NOEXCEPT_IF(noexcept(__lhs.swap(__rhs)))
801 { __lhs.swap(__rhs); }
802
803 } // namespace __debug
804 } // namespace std
805
806 #endif