1// -*- C++ -*-
2//===---------------------------- list ------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_LIST
11#define _LIBCPP_LIST
12
13/*
14 list synopsis
15
16namespace std
17{
18
19template <class T, class Alloc = allocator<T> >
20class list
21{
22public:
23
24 // types:
25 typedef T value_type;
26 typedef Alloc allocator_type;
27 typedef typename allocator_type::reference reference;
28 typedef typename allocator_type::const_reference const_reference;
29 typedef typename allocator_type::pointer pointer;
30 typedef typename allocator_type::const_pointer const_pointer;
31 typedef implementation-defined iterator;
32 typedef implementation-defined const_iterator;
33 typedef implementation-defined size_type;
34 typedef implementation-defined difference_type;
35 typedef reverse_iterator<iterator> reverse_iterator;
36 typedef reverse_iterator<const_iterator> const_reverse_iterator;
37
38 list()
39 noexcept(is_nothrow_default_constructible<allocator_type>::value);
40 explicit list(const allocator_type& a);
41 explicit list(size_type n);
42 explicit list(size_type n, const allocator_type& a); // C++14
43 list(size_type n, const value_type& value);
44 list(size_type n, const value_type& value, const allocator_type& a);
45 template <class Iter>
46 list(Iter first, Iter last);
47 template <class Iter>
48 list(Iter first, Iter last, const allocator_type& a);
49 list(const list& x);
50 list(const list&, const allocator_type& a);
51 list(list&& x)
52 noexcept(is_nothrow_move_constructible<allocator_type>::value);
53 list(list&&, const allocator_type& a);
54 list(initializer_list<value_type>);
55 list(initializer_list<value_type>, const allocator_type& a);
56
57 ~list();
58
59 list& operator=(const list& x);
60 list& operator=(list&& x)
61 noexcept(
62 allocator_type::propagate_on_container_move_assignment::value &&
63 is_nothrow_move_assignable<allocator_type>::value);
64 list& operator=(initializer_list<value_type>);
65 template <class Iter>
66 void assign(Iter first, Iter last);
67 void assign(size_type n, const value_type& t);
68 void assign(initializer_list<value_type>);
69
70 allocator_type get_allocator() const noexcept;
71
72 iterator begin() noexcept;
73 const_iterator begin() const noexcept;
74 iterator end() noexcept;
75 const_iterator end() const noexcept;
76 reverse_iterator rbegin() noexcept;
77 const_reverse_iterator rbegin() const noexcept;
78 reverse_iterator rend() noexcept;
79 const_reverse_iterator rend() const noexcept;
80 const_iterator cbegin() const noexcept;
81 const_iterator cend() const noexcept;
82 const_reverse_iterator crbegin() const noexcept;
83 const_reverse_iterator crend() const noexcept;
84
85 reference front();
86 const_reference front() const;
87 reference back();
88 const_reference back() const;
89
90 bool empty() const noexcept;
91 size_type size() const noexcept;
92 size_type max_size() const noexcept;
93
94 template <class... Args>
95 reference emplace_front(Args&&... args); // reference in C++17
96 void pop_front();
97 template <class... Args>
98 reference emplace_back(Args&&... args); // reference in C++17
99 void pop_back();
100 void push_front(const value_type& x);
101 void push_front(value_type&& x);
102 void push_back(const value_type& x);
103 void push_back(value_type&& x);
104 template <class... Args>
105 iterator emplace(const_iterator position, Args&&... args);
106 iterator insert(const_iterator position, const value_type& x);
107 iterator insert(const_iterator position, value_type&& x);
108 iterator insert(const_iterator position, size_type n, const value_type& x);
109 template <class Iter>
110 iterator insert(const_iterator position, Iter first, Iter last);
111 iterator insert(const_iterator position, initializer_list<value_type> il);
112
113 iterator erase(const_iterator position);
114 iterator erase(const_iterator position, const_iterator last);
115
116 void resize(size_type sz);
117 void resize(size_type sz, const value_type& c);
118
119 void swap(list&)
120 noexcept(allocator_traits<allocator_type>::is_always_equal::value); // C++17
121 void clear() noexcept;
122
123 void splice(const_iterator position, list& x);
124 void splice(const_iterator position, list&& x);
125 void splice(const_iterator position, list& x, const_iterator i);
126 void splice(const_iterator position, list&& x, const_iterator i);
127 void splice(const_iterator position, list& x, const_iterator first,
128 const_iterator last);
129 void splice(const_iterator position, list&& x, const_iterator first,
130 const_iterator last);
131
132 size_type remove(const value_type& value); // void before C++20
133 template <class Pred>
134 size_type remove_if(Pred pred); // void before C++20
135 size_type unique(); // void before C++20
136 template <class BinaryPredicate>
137 size_type unique(BinaryPredicate binary_pred); // void before C++20
138 void merge(list& x);
139 void merge(list&& x);
140 template <class Compare>
141 void merge(list& x, Compare comp);
142 template <class Compare>
143 void merge(list&& x, Compare comp);
144 void sort();
145 template <class Compare>
146 void sort(Compare comp);
147 void reverse() noexcept;
148};
149
150
151template <class InputIterator, class Allocator = allocator<typename iterator_traits<InputIterator>::value_type>>
152 list(InputIterator, InputIterator, Allocator = Allocator())
153 -> list<typename iterator_traits<InputIterator>::value_type, Allocator>; // C++17
154
155template <class T, class Alloc>
156 bool operator==(const list<T,Alloc>& x, const list<T,Alloc>& y);
157template <class T, class Alloc>
158 bool operator< (const list<T,Alloc>& x, const list<T,Alloc>& y);
159template <class T, class Alloc>
160 bool operator!=(const list<T,Alloc>& x, const list<T,Alloc>& y);
161template <class T, class Alloc>
162 bool operator> (const list<T,Alloc>& x, const list<T,Alloc>& y);
163template <class T, class Alloc>
164 bool operator>=(const list<T,Alloc>& x, const list<T,Alloc>& y);
165template <class T, class Alloc>
166 bool operator<=(const list<T,Alloc>& x, const list<T,Alloc>& y);
167
168template <class T, class Alloc>
169 void swap(list<T,Alloc>& x, list<T,Alloc>& y)
170 noexcept(noexcept(x.swap(y)));
171
172template <class T, class Allocator, class U>
173 void erase(list<T, Allocator>& c, const U& value); // C++20
174template <class T, class Allocator, class Predicate>
175 void erase_if(list<T, Allocator>& c, Predicate pred); // C++20
176
177} // std
178
179*/
180
181#include <__config>
182
183#include <memory>
184#include <limits>
185#include <initializer_list>
186#include <iterator>
187#include <algorithm>
188#include <type_traits>
189#include <version>
190
191#include <__debug>
192
193#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
194#pragma GCC system_header
195#endif
196
197_LIBCPP_PUSH_MACROS
198#include <__undef_macros>
199
200
201_LIBCPP_BEGIN_NAMESPACE_STD
202
203template <class _Tp, class _VoidPtr> struct __list_node;
204template <class _Tp, class _VoidPtr> struct __list_node_base;
205
206template <class _Tp, class _VoidPtr>
207struct __list_node_pointer_traits {
208 typedef typename __rebind_pointer<_VoidPtr, __list_node<_Tp, _VoidPtr> >::type
209 __node_pointer;
210 typedef typename __rebind_pointer<_VoidPtr, __list_node_base<_Tp, _VoidPtr> >::type
211 __base_pointer;
212
213#if defined(_LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB)
214 typedef __base_pointer __link_pointer;
215#else
216 typedef typename conditional<
217 is_pointer<_VoidPtr>::value,
218 __base_pointer,
219 __node_pointer
220 >::type __link_pointer;
221#endif
222
223 typedef typename conditional<
224 is_same<__link_pointer, __node_pointer>::value,
225 __base_pointer,
226 __node_pointer
227 >::type __non_link_pointer;
228
229 static _LIBCPP_INLINE_VISIBILITY
230 __link_pointer __unsafe_link_pointer_cast(__link_pointer __p) {
231 return __p;
232 }
233
234 static _LIBCPP_INLINE_VISIBILITY
235 __link_pointer __unsafe_link_pointer_cast(__non_link_pointer __p) {
236 return static_cast<__link_pointer>(static_cast<_VoidPtr>(__p));
237 }
238
239};
240
241template <class _Tp, class _VoidPtr>
242struct __list_node_base
243{
244 typedef __list_node_pointer_traits<_Tp, _VoidPtr> _NodeTraits;
245 typedef typename _NodeTraits::__node_pointer __node_pointer;
246 typedef typename _NodeTraits::__base_pointer __base_pointer;
247 typedef typename _NodeTraits::__link_pointer __link_pointer;
248
249 __link_pointer __prev_;
250 __link_pointer __next_;
251
252 _LIBCPP_INLINE_VISIBILITY
253 __list_node_base() : __prev_(_NodeTraits::__unsafe_link_pointer_cast(__self())),
254 __next_(_NodeTraits::__unsafe_link_pointer_cast(__self())) {}
255
256 _LIBCPP_INLINE_VISIBILITY
257 __base_pointer __self() {
258 return pointer_traits<__base_pointer>::pointer_to(*this);
259 }
260
261 _LIBCPP_INLINE_VISIBILITY
262 __node_pointer __as_node() {
263 return static_cast<__node_pointer>(__self());
264 }
265};
266
267template <class _Tp, class _VoidPtr>
268struct __list_node
269 : public __list_node_base<_Tp, _VoidPtr>
270{
271 _Tp __value_;
272
273 typedef __list_node_base<_Tp, _VoidPtr> __base;
274 typedef typename __base::__link_pointer __link_pointer;
275
276 _LIBCPP_INLINE_VISIBILITY
277 __link_pointer __as_link() {
278 return static_cast<__link_pointer>(__base::__self());
279 }
280};
281
282template <class _Tp, class _Alloc = allocator<_Tp> > class _LIBCPP_TEMPLATE_VIS list;
283template <class _Tp, class _Alloc> class __list_imp;
284template <class _Tp, class _VoidPtr> class _LIBCPP_TEMPLATE_VIS __list_const_iterator;
285
286template <class _Tp, class _VoidPtr>
287class _LIBCPP_TEMPLATE_VIS __list_iterator
288{
289 typedef __list_node_pointer_traits<_Tp, _VoidPtr> _NodeTraits;
290 typedef typename _NodeTraits::__link_pointer __link_pointer;
291
292 __link_pointer __ptr_;
293
294#if _LIBCPP_DEBUG_LEVEL >= 2
295 _LIBCPP_INLINE_VISIBILITY
296 explicit __list_iterator(__link_pointer __p, const void* __c) _NOEXCEPT
297 : __ptr_(__p)
298 {
299 __get_db()->__insert_ic(this, __c);
300 }
301#else
302 _LIBCPP_INLINE_VISIBILITY
303 explicit __list_iterator(__link_pointer __p) _NOEXCEPT : __ptr_(__p) {}
304#endif
305
306
307
308 template<class, class> friend class list;
309 template<class, class> friend class __list_imp;
310 template<class, class> friend class __list_const_iterator;
311public:
312 typedef bidirectional_iterator_tag iterator_category;
313 typedef _Tp value_type;
314 typedef value_type& reference;
315 typedef typename __rebind_pointer<_VoidPtr, value_type>::type pointer;
316 typedef typename pointer_traits<pointer>::difference_type difference_type;
317
318 _LIBCPP_INLINE_VISIBILITY
319 __list_iterator() _NOEXCEPT : __ptr_(nullptr)
320 {
321#if _LIBCPP_DEBUG_LEVEL >= 2
322 __get_db()->__insert_i(this);
323#endif
324 }
325
326#if _LIBCPP_DEBUG_LEVEL >= 2
327
328 _LIBCPP_INLINE_VISIBILITY
329 __list_iterator(const __list_iterator& __p)
330 : __ptr_(__p.__ptr_)
331 {
332 __get_db()->__iterator_copy(this, &__p);
333 }
334
335 _LIBCPP_INLINE_VISIBILITY
336 ~__list_iterator()
337 {
338 __get_db()->__erase_i(this);
339 }
340
341 _LIBCPP_INLINE_VISIBILITY
342 __list_iterator& operator=(const __list_iterator& __p)
343 {
344 if (this != &__p)
345 {
346 __get_db()->__iterator_copy(this, &__p);
347 __ptr_ = __p.__ptr_;
348 }
349 return *this;
350 }
351
352#endif // _LIBCPP_DEBUG_LEVEL >= 2
353
354 _LIBCPP_INLINE_VISIBILITY
355 reference operator*() const
356 {
357#if _LIBCPP_DEBUG_LEVEL >= 2
358 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
359 "Attempted to dereference a non-dereferenceable list::iterator");
360#endif
361 return __ptr_->__as_node()->__value_;
362 }
363 _LIBCPP_INLINE_VISIBILITY
364 pointer operator->() const
365 {
366#if _LIBCPP_DEBUG_LEVEL >= 2
367 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
368 "Attempted to dereference a non-dereferenceable list::iterator");
369#endif
370 return pointer_traits<pointer>::pointer_to(__ptr_->__as_node()->__value_);
371 }
372
373 _LIBCPP_INLINE_VISIBILITY
374 __list_iterator& operator++()
375 {
376#if _LIBCPP_DEBUG_LEVEL >= 2
377 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
378 "Attempted to increment non-incrementable list::iterator");
379#endif
380 __ptr_ = __ptr_->__next_;
381 return *this;
382 }
383 _LIBCPP_INLINE_VISIBILITY
384 __list_iterator operator++(int) {__list_iterator __t(*this); ++(*this); return __t;}
385
386 _LIBCPP_INLINE_VISIBILITY
387 __list_iterator& operator--()
388 {
389#if _LIBCPP_DEBUG_LEVEL >= 2
390 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this),
391 "Attempted to decrement non-decrementable list::iterator");
392#endif
393 __ptr_ = __ptr_->__prev_;
394 return *this;
395 }
396 _LIBCPP_INLINE_VISIBILITY
397 __list_iterator operator--(int) {__list_iterator __t(*this); --(*this); return __t;}
398
399 friend _LIBCPP_INLINE_VISIBILITY
400 bool operator==(const __list_iterator& __x, const __list_iterator& __y)
401 {
402 return __x.__ptr_ == __y.__ptr_;
403 }
404 friend _LIBCPP_INLINE_VISIBILITY
405 bool operator!=(const __list_iterator& __x, const __list_iterator& __y)
406 {return !(__x == __y);}
407};
408
409template <class _Tp, class _VoidPtr>
410class _LIBCPP_TEMPLATE_VIS __list_const_iterator
411{
412 typedef __list_node_pointer_traits<_Tp, _VoidPtr> _NodeTraits;
413 typedef typename _NodeTraits::__link_pointer __link_pointer;
414
415 __link_pointer __ptr_;
416
417#if _LIBCPP_DEBUG_LEVEL >= 2
418 _LIBCPP_INLINE_VISIBILITY
419 explicit __list_const_iterator(__link_pointer __p, const void* __c) _NOEXCEPT
420 : __ptr_(__p)
421 {
422 __get_db()->__insert_ic(this, __c);
423 }
424#else
425 _LIBCPP_INLINE_VISIBILITY
426 explicit __list_const_iterator(__link_pointer __p) _NOEXCEPT : __ptr_(__p) {}
427#endif
428
429 template<class, class> friend class list;
430 template<class, class> friend class __list_imp;
431public:
432 typedef bidirectional_iterator_tag iterator_category;
433 typedef _Tp value_type;
434 typedef const value_type& reference;
435 typedef typename __rebind_pointer<_VoidPtr, const value_type>::type pointer;
436 typedef typename pointer_traits<pointer>::difference_type difference_type;
437
438 _LIBCPP_INLINE_VISIBILITY
439 __list_const_iterator() _NOEXCEPT : __ptr_(nullptr)
440 {
441#if _LIBCPP_DEBUG_LEVEL >= 2
442 __get_db()->__insert_i(this);
443#endif
444 }
445 _LIBCPP_INLINE_VISIBILITY
446 __list_const_iterator(const __list_iterator<_Tp, _VoidPtr>& __p) _NOEXCEPT
447 : __ptr_(__p.__ptr_)
448 {
449#if _LIBCPP_DEBUG_LEVEL >= 2
450 __get_db()->__iterator_copy(this, &__p);
451#endif
452 }
453
454#if _LIBCPP_DEBUG_LEVEL >= 2
455
456 _LIBCPP_INLINE_VISIBILITY
457 __list_const_iterator(const __list_const_iterator& __p)
458 : __ptr_(__p.__ptr_)
459 {
460 __get_db()->__iterator_copy(this, &__p);
461 }
462
463 _LIBCPP_INLINE_VISIBILITY
464 ~__list_const_iterator()
465 {
466 __get_db()->__erase_i(this);
467 }
468
469 _LIBCPP_INLINE_VISIBILITY
470 __list_const_iterator& operator=(const __list_const_iterator& __p)
471 {
472 if (this != &__p)
473 {
474 __get_db()->__iterator_copy(this, &__p);
475 __ptr_ = __p.__ptr_;
476 }
477 return *this;
478 }
479
480#endif // _LIBCPP_DEBUG_LEVEL >= 2
481 _LIBCPP_INLINE_VISIBILITY
482 reference operator*() const
483 {
484#if _LIBCPP_DEBUG_LEVEL >= 2
485 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
486 "Attempted to dereference a non-dereferenceable list::const_iterator");
487#endif
488 return __ptr_->__as_node()->__value_;
489 }
490 _LIBCPP_INLINE_VISIBILITY
491 pointer operator->() const
492 {
493#if _LIBCPP_DEBUG_LEVEL >= 2
494 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
495 "Attempted to dereference a non-dereferenceable list::const_iterator");
496#endif
497 return pointer_traits<pointer>::pointer_to(__ptr_->__as_node()->__value_);
498 }
499
500 _LIBCPP_INLINE_VISIBILITY
501 __list_const_iterator& operator++()
502 {
503#if _LIBCPP_DEBUG_LEVEL >= 2
504 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
505 "Attempted to increment non-incrementable list::const_iterator");
506#endif
507 __ptr_ = __ptr_->__next_;
508 return *this;
509 }
510 _LIBCPP_INLINE_VISIBILITY
511 __list_const_iterator operator++(int) {__list_const_iterator __t(*this); ++(*this); return __t;}
512
513 _LIBCPP_INLINE_VISIBILITY
514 __list_const_iterator& operator--()
515 {
516#if _LIBCPP_DEBUG_LEVEL >= 2
517 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this),
518 "Attempted to decrement non-decrementable list::const_iterator");
519#endif
520 __ptr_ = __ptr_->__prev_;
521 return *this;
522 }
523 _LIBCPP_INLINE_VISIBILITY
524 __list_const_iterator operator--(int) {__list_const_iterator __t(*this); --(*this); return __t;}
525
526 friend _LIBCPP_INLINE_VISIBILITY
527 bool operator==(const __list_const_iterator& __x, const __list_const_iterator& __y)
528 {
529 return __x.__ptr_ == __y.__ptr_;
530 }
531 friend _LIBCPP_INLINE_VISIBILITY
532 bool operator!=(const __list_const_iterator& __x, const __list_const_iterator& __y)
533 {return !(__x == __y);}
534};
535
536template <class _Tp, class _Alloc>
537class __list_imp
538{
539 __list_imp(const __list_imp&);
540 __list_imp& operator=(const __list_imp&);
541public:
542 typedef _Alloc allocator_type;
543 typedef allocator_traits<allocator_type> __alloc_traits;
544 typedef typename __alloc_traits::size_type size_type;
545protected:
546 typedef _Tp value_type;
547 typedef typename __alloc_traits::void_pointer __void_pointer;
548 typedef __list_iterator<value_type, __void_pointer> iterator;
549 typedef __list_const_iterator<value_type, __void_pointer> const_iterator;
550 typedef __list_node_base<value_type, __void_pointer> __node_base;
551 typedef __list_node<value_type, __void_pointer> __node;
552 typedef typename __rebind_alloc_helper<__alloc_traits, __node>::type __node_allocator;
553 typedef allocator_traits<__node_allocator> __node_alloc_traits;
554 typedef typename __node_alloc_traits::pointer __node_pointer;
555 typedef typename __node_alloc_traits::pointer __node_const_pointer;
556 typedef __list_node_pointer_traits<value_type, __void_pointer> __node_pointer_traits;
557 typedef typename __node_pointer_traits::__link_pointer __link_pointer;
558 typedef __link_pointer __link_const_pointer;
559 typedef typename __alloc_traits::pointer pointer;
560 typedef typename __alloc_traits::const_pointer const_pointer;
561 typedef typename __alloc_traits::difference_type difference_type;
562
563 typedef typename __rebind_alloc_helper<__alloc_traits, __node_base>::type __node_base_allocator;
564 typedef typename allocator_traits<__node_base_allocator>::pointer __node_base_pointer;
565 static_assert((!is_same<allocator_type, __node_allocator>::value),
566 "internal allocator type must differ from user-specified "
567 "type; otherwise overload resolution breaks");
568
569 __node_base __end_;
570 __compressed_pair<size_type, __node_allocator> __size_alloc_;
571
572 _LIBCPP_INLINE_VISIBILITY
573 __link_pointer __end_as_link() const _NOEXCEPT {
574 return __node_pointer_traits::__unsafe_link_pointer_cast(
575 const_cast<__node_base&>(__end_).__self());
576 }
577
578 _LIBCPP_INLINE_VISIBILITY
579 size_type& __sz() _NOEXCEPT {return __size_alloc_.first();}
580 _LIBCPP_INLINE_VISIBILITY
581 const size_type& __sz() const _NOEXCEPT
582 {return __size_alloc_.first();}
583 _LIBCPP_INLINE_VISIBILITY
584 __node_allocator& __node_alloc() _NOEXCEPT
585 {return __size_alloc_.second();}
586 _LIBCPP_INLINE_VISIBILITY
587 const __node_allocator& __node_alloc() const _NOEXCEPT
588 {return __size_alloc_.second();}
589
590 _LIBCPP_INLINE_VISIBILITY
591 size_type __node_alloc_max_size() const _NOEXCEPT {
592 return __node_alloc_traits::max_size(__node_alloc());
593 }
594 _LIBCPP_INLINE_VISIBILITY
595 static void __unlink_nodes(__link_pointer __f, __link_pointer __l) _NOEXCEPT;
596
597 _LIBCPP_INLINE_VISIBILITY
598 __list_imp()
599 _NOEXCEPT_(is_nothrow_default_constructible<__node_allocator>::value);
600 _LIBCPP_INLINE_VISIBILITY
601 __list_imp(const allocator_type& __a);
602 _LIBCPP_INLINE_VISIBILITY
603 __list_imp(const __node_allocator& __a);
604#ifndef _LIBCPP_CXX03_LANG
605 __list_imp(__node_allocator&& __a) _NOEXCEPT;
606#endif
607 ~__list_imp();
608 void clear() _NOEXCEPT;
609 _LIBCPP_INLINE_VISIBILITY
610 bool empty() const _NOEXCEPT {return __sz() == 0;}
611
612 _LIBCPP_INLINE_VISIBILITY
613 iterator begin() _NOEXCEPT
614 {
615#if _LIBCPP_DEBUG_LEVEL >= 2
616 return iterator(__end_.__next_, this);
617#else
618 return iterator(__end_.__next_);
619#endif
620 }
621 _LIBCPP_INLINE_VISIBILITY
622 const_iterator begin() const _NOEXCEPT
623 {
624#if _LIBCPP_DEBUG_LEVEL >= 2
625 return const_iterator(__end_.__next_, this);
626#else
627 return const_iterator(__end_.__next_);
628#endif
629 }
630 _LIBCPP_INLINE_VISIBILITY
631 iterator end() _NOEXCEPT
632 {
633#if _LIBCPP_DEBUG_LEVEL >= 2
634 return iterator(__end_as_link(), this);
635#else
636 return iterator(__end_as_link());
637#endif
638 }
639 _LIBCPP_INLINE_VISIBILITY
640 const_iterator end() const _NOEXCEPT
641 {
642#if _LIBCPP_DEBUG_LEVEL >= 2
643 return const_iterator(__end_as_link(), this);
644#else
645 return const_iterator(__end_as_link());
646#endif
647 }
648
649 void swap(__list_imp& __c)
650#if _LIBCPP_STD_VER >= 14
651 _NOEXCEPT;
652#else
653 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||
654 __is_nothrow_swappable<allocator_type>::value);
655#endif
656
657 _LIBCPP_INLINE_VISIBILITY
658 void __copy_assign_alloc(const __list_imp& __c)
659 {__copy_assign_alloc(__c, integral_constant<bool,
660 __node_alloc_traits::propagate_on_container_copy_assignment::value>());}
661
662 _LIBCPP_INLINE_VISIBILITY
663 void __move_assign_alloc(__list_imp& __c)
664 _NOEXCEPT_(
665 !__node_alloc_traits::propagate_on_container_move_assignment::value ||
666 is_nothrow_move_assignable<__node_allocator>::value)
667 {__move_assign_alloc(__c, integral_constant<bool,
668 __node_alloc_traits::propagate_on_container_move_assignment::value>());}
669
670private:
671 _LIBCPP_INLINE_VISIBILITY
672 void __copy_assign_alloc(const __list_imp& __c, true_type)
673 {
674 if (__node_alloc() != __c.__node_alloc())
675 clear();
676 __node_alloc() = __c.__node_alloc();
677 }
678
679 _LIBCPP_INLINE_VISIBILITY
680 void __copy_assign_alloc(const __list_imp&, false_type)
681 {}
682
683 _LIBCPP_INLINE_VISIBILITY
684 void __move_assign_alloc(__list_imp& __c, true_type)
685 _NOEXCEPT_(is_nothrow_move_assignable<__node_allocator>::value)
686 {
687 __node_alloc() = _VSTD::move(__c.__node_alloc());
688 }
689
690 _LIBCPP_INLINE_VISIBILITY
691 void __move_assign_alloc(__list_imp&, false_type)
692 _NOEXCEPT
693 {}
694
695 _LIBCPP_INLINE_VISIBILITY
696 void __invalidate_all_iterators() {
697#if _LIBCPP_DEBUG_LEVEL >= 2
698 __get_db()->__invalidate_all(this);
699#endif
700 }
701};
702
703// Unlink nodes [__f, __l]
704template <class _Tp, class _Alloc>
705inline
706void
707__list_imp<_Tp, _Alloc>::__unlink_nodes(__link_pointer __f, __link_pointer __l)
708 _NOEXCEPT
709{
710 __f->__prev_->__next_ = __l->__next_;
711 __l->__next_->__prev_ = __f->__prev_;
712}
713
714template <class _Tp, class _Alloc>
715inline
716__list_imp<_Tp, _Alloc>::__list_imp()
717 _NOEXCEPT_(is_nothrow_default_constructible<__node_allocator>::value)
718 : __size_alloc_(0, __default_init_tag())
719{
720}
721
722template <class _Tp, class _Alloc>
723inline
724__list_imp<_Tp, _Alloc>::__list_imp(const allocator_type& __a)
725 : __size_alloc_(0, __node_allocator(__a))
726{
727}
728
729template <class _Tp, class _Alloc>
730inline __list_imp<_Tp, _Alloc>::__list_imp(const __node_allocator& __a)
731 : __size_alloc_(0, __a) {}
732
733#ifndef _LIBCPP_CXX03_LANG
734template <class _Tp, class _Alloc>
735inline __list_imp<_Tp, _Alloc>::__list_imp(__node_allocator&& __a) _NOEXCEPT
736 : __size_alloc_(0, std::move(__a)) {}
737#endif
738
739template <class _Tp, class _Alloc>
740__list_imp<_Tp, _Alloc>::~__list_imp() {
741 clear();
742#if _LIBCPP_DEBUG_LEVEL >= 2
743 __get_db()->__erase_c(this);
744#endif
745}
746
747template <class _Tp, class _Alloc>
748void
749__list_imp<_Tp, _Alloc>::clear() _NOEXCEPT
750{
751 if (!empty())
752 {
753 __node_allocator& __na = __node_alloc();
754 __link_pointer __f = __end_.__next_;
755 __link_pointer __l = __end_as_link();
756 __unlink_nodes(__f, __l->__prev_);
757 __sz() = 0;
758 while (__f != __l)
759 {
760 __node_pointer __np = __f->__as_node();
761 __f = __f->__next_;
762 __node_alloc_traits::destroy(__na, _VSTD::addressof(__np->__value_));
763 __node_alloc_traits::deallocate(__na, __np, 1);
764 }
765 __invalidate_all_iterators();
766 }
767}
768
769template <class _Tp, class _Alloc>
770void
771__list_imp<_Tp, _Alloc>::swap(__list_imp& __c)
772#if _LIBCPP_STD_VER >= 14
773 _NOEXCEPT
774#else
775 _NOEXCEPT_(!__alloc_traits::propagate_on_container_swap::value ||
776 __is_nothrow_swappable<allocator_type>::value)
777#endif
778{
779 _LIBCPP_ASSERT(__alloc_traits::propagate_on_container_swap::value ||
780 this->__node_alloc() == __c.__node_alloc(),
781 "list::swap: Either propagate_on_container_swap must be true"
782 " or the allocators must compare equal");
783 using _VSTD::swap;
784 __swap_allocator(__node_alloc(), __c.__node_alloc());
785 swap(__sz(), __c.__sz());
786 swap(__end_, __c.__end_);
787 if (__sz() == 0)
788 __end_.__next_ = __end_.__prev_ = __end_as_link();
789 else
790 __end_.__prev_->__next_ = __end_.__next_->__prev_ = __end_as_link();
791 if (__c.__sz() == 0)
792 __c.__end_.__next_ = __c.__end_.__prev_ = __c.__end_as_link();
793 else
794 __c.__end_.__prev_->__next_ = __c.__end_.__next_->__prev_ = __c.__end_as_link();
795
796#if _LIBCPP_DEBUG_LEVEL >= 2
797 __libcpp_db* __db = __get_db();
798 __c_node* __cn1 = __db->__find_c_and_lock(this);
799 __c_node* __cn2 = __db->__find_c(&__c);
800 std::swap(__cn1->beg_, __cn2->beg_);
801 std::swap(__cn1->end_, __cn2->end_);
802 std::swap(__cn1->cap_, __cn2->cap_);
803 for (__i_node** __p = __cn1->end_; __p != __cn1->beg_;)
804 {
805 --__p;
806 const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_);
807 if (__i->__ptr_ == __c.__end_as_link())
808 {
809 __cn2->__add(*__p);
810 if (--__cn1->end_ != __p)
811 memmove(__p, __p+1, (__cn1->end_ - __p)*sizeof(__i_node*));
812 }
813 else
814 (*__p)->__c_ = __cn1;
815 }
816 for (__i_node** __p = __cn2->end_; __p != __cn2->beg_;)
817 {
818 --__p;
819 const_iterator* __i = static_cast<const_iterator*>((*__p)->__i_);
820 if (__i->__ptr_ == __end_as_link())
821 {
822 __cn1->__add(*__p);
823 if (--__cn2->end_ != __p)
824 memmove(__p, __p+1, (__cn2->end_ - __p)*sizeof(__i_node*));
825 }
826 else
827 (*__p)->__c_ = __cn2;
828 }
829 __db->unlock();
830#endif
831}
832
833template <class _Tp, class _Alloc /*= allocator<_Tp>*/>
834class _LIBCPP_TEMPLATE_VIS list
835 : private __list_imp<_Tp, _Alloc>
836{
837 typedef __list_imp<_Tp, _Alloc> base;
838 typedef typename base::__node __node;
839 typedef typename base::__node_allocator __node_allocator;
840 typedef typename base::__node_pointer __node_pointer;
841 typedef typename base::__node_alloc_traits __node_alloc_traits;
842 typedef typename base::__node_base __node_base;
843 typedef typename base::__node_base_pointer __node_base_pointer;
844 typedef typename base::__link_pointer __link_pointer;
845
846public:
847 typedef _Tp value_type;
848 typedef _Alloc allocator_type;
849 static_assert((is_same<value_type, typename allocator_type::value_type>::value),
850 "Invalid allocator::value_type");
851 typedef value_type& reference;
852 typedef const value_type& const_reference;
853 typedef typename base::pointer pointer;
854 typedef typename base::const_pointer const_pointer;
855 typedef typename base::size_type size_type;
856 typedef typename base::difference_type difference_type;
857 typedef typename base::iterator iterator;
858 typedef typename base::const_iterator const_iterator;
859 typedef _VSTD::reverse_iterator<iterator> reverse_iterator;
860 typedef _VSTD::reverse_iterator<const_iterator> const_reverse_iterator;
861#if _LIBCPP_STD_VER > 17
862 typedef size_type __remove_return_type;
863#else
864 typedef void __remove_return_type;
865#endif
866
867 _LIBCPP_INLINE_VISIBILITY
868 list()
869 _NOEXCEPT_(is_nothrow_default_constructible<__node_allocator>::value)
870 {
871#if _LIBCPP_DEBUG_LEVEL >= 2
872 __get_db()->__insert_c(this);
873#endif
874 }
875 _LIBCPP_INLINE_VISIBILITY
876 explicit list(const allocator_type& __a) : base(__a)
877 {
878#if _LIBCPP_DEBUG_LEVEL >= 2
879 __get_db()->__insert_c(this);
880#endif
881 }
882 explicit list(size_type __n);
883#if _LIBCPP_STD_VER > 11
884 explicit list(size_type __n, const allocator_type& __a);
885#endif
886 list(size_type __n, const value_type& __x);
887 list(size_type __n, const value_type& __x, const allocator_type& __a);
888 template <class _InpIter>
889 list(_InpIter __f, _InpIter __l,
890 typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type* = 0);
891 template <class _InpIter>
892 list(_InpIter __f, _InpIter __l, const allocator_type& __a,
893 typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type* = 0);
894
895 list(const list& __c);
896 list(const list& __c, const allocator_type& __a);
897 _LIBCPP_INLINE_VISIBILITY
898 list& operator=(const list& __c);
899#ifndef _LIBCPP_CXX03_LANG
900 list(initializer_list<value_type> __il);
901 list(initializer_list<value_type> __il, const allocator_type& __a);
902
903 _LIBCPP_INLINE_VISIBILITY
904 list(list&& __c)
905 _NOEXCEPT_(is_nothrow_move_constructible<__node_allocator>::value);
906 _LIBCPP_INLINE_VISIBILITY
907 list(list&& __c, const allocator_type& __a);
908 _LIBCPP_INLINE_VISIBILITY
909 list& operator=(list&& __c)
910 _NOEXCEPT_(
911 __node_alloc_traits::propagate_on_container_move_assignment::value &&
912 is_nothrow_move_assignable<__node_allocator>::value);
913
914 _LIBCPP_INLINE_VISIBILITY
915 list& operator=(initializer_list<value_type> __il)
916 {assign(__il.begin(), __il.end()); return *this;}
917
918 _LIBCPP_INLINE_VISIBILITY
919 void assign(initializer_list<value_type> __il)
920 {assign(__il.begin(), __il.end());}
921#endif // _LIBCPP_CXX03_LANG
922
923 template <class _InpIter>
924 void assign(_InpIter __f, _InpIter __l,
925 typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type* = 0);
926 void assign(size_type __n, const value_type& __x);
927
928 _LIBCPP_INLINE_VISIBILITY
929 allocator_type get_allocator() const _NOEXCEPT;
930
931 _LIBCPP_INLINE_VISIBILITY
932 size_type size() const _NOEXCEPT {return base::__sz();}
933 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
934 bool empty() const _NOEXCEPT {return base::empty();}
935 _LIBCPP_INLINE_VISIBILITY
936 size_type max_size() const _NOEXCEPT
937 {
938 return std::min<size_type>(
939 base::__node_alloc_max_size(),
940 numeric_limits<difference_type >::max());
941 }
942
943 _LIBCPP_INLINE_VISIBILITY
944 iterator begin() _NOEXCEPT {return base::begin();}
945 _LIBCPP_INLINE_VISIBILITY
946 const_iterator begin() const _NOEXCEPT {return base::begin();}
947 _LIBCPP_INLINE_VISIBILITY
948 iterator end() _NOEXCEPT {return base::end();}
949 _LIBCPP_INLINE_VISIBILITY
950 const_iterator end() const _NOEXCEPT {return base::end();}
951 _LIBCPP_INLINE_VISIBILITY
952 const_iterator cbegin() const _NOEXCEPT {return base::begin();}
953 _LIBCPP_INLINE_VISIBILITY
954 const_iterator cend() const _NOEXCEPT {return base::end();}
955
956 _LIBCPP_INLINE_VISIBILITY
957 reverse_iterator rbegin() _NOEXCEPT
958 {return reverse_iterator(end());}
959 _LIBCPP_INLINE_VISIBILITY
960 const_reverse_iterator rbegin() const _NOEXCEPT
961 {return const_reverse_iterator(end());}
962 _LIBCPP_INLINE_VISIBILITY
963 reverse_iterator rend() _NOEXCEPT
964 {return reverse_iterator(begin());}
965 _LIBCPP_INLINE_VISIBILITY
966 const_reverse_iterator rend() const _NOEXCEPT
967 {return const_reverse_iterator(begin());}
968 _LIBCPP_INLINE_VISIBILITY
969 const_reverse_iterator crbegin() const _NOEXCEPT
970 {return const_reverse_iterator(end());}
971 _LIBCPP_INLINE_VISIBILITY
972 const_reverse_iterator crend() const _NOEXCEPT
973 {return const_reverse_iterator(begin());}
974
975 _LIBCPP_INLINE_VISIBILITY
976 reference front()
977 {
978 _LIBCPP_ASSERT(!empty(), "list::front called on empty list");
979 return base::__end_.__next_->__as_node()->__value_;
980 }
981 _LIBCPP_INLINE_VISIBILITY
982 const_reference front() const
983 {
984 _LIBCPP_ASSERT(!empty(), "list::front called on empty list");
985 return base::__end_.__next_->__as_node()->__value_;
986 }
987 _LIBCPP_INLINE_VISIBILITY
988 reference back()
989 {
990 _LIBCPP_ASSERT(!empty(), "list::back called on empty list");
991 return base::__end_.__prev_->__as_node()->__value_;
992 }
993 _LIBCPP_INLINE_VISIBILITY
994 const_reference back() const
995 {
996 _LIBCPP_ASSERT(!empty(), "list::back called on empty list");
997 return base::__end_.__prev_->__as_node()->__value_;
998 }
999
1000#ifndef _LIBCPP_CXX03_LANG
1001 void push_front(value_type&& __x);
1002 void push_back(value_type&& __x);
1003
1004 template <class... _Args>
1005#if _LIBCPP_STD_VER > 14
1006 reference emplace_front(_Args&&... __args);
1007#else
1008 void emplace_front(_Args&&... __args);
1009#endif
1010 template <class... _Args>
1011#if _LIBCPP_STD_VER > 14
1012 reference emplace_back(_Args&&... __args);
1013#else
1014 void emplace_back(_Args&&... __args);
1015#endif
1016 template <class... _Args>
1017 iterator emplace(const_iterator __p, _Args&&... __args);
1018
1019 iterator insert(const_iterator __p, value_type&& __x);
1020
1021 _LIBCPP_INLINE_VISIBILITY
1022 iterator insert(const_iterator __p, initializer_list<value_type> __il)
1023 {return insert(__p, __il.begin(), __il.end());}
1024#endif // _LIBCPP_CXX03_LANG
1025
1026 void push_front(const value_type& __x);
1027 void push_back(const value_type& __x);
1028
1029#ifndef _LIBCPP_CXX03_LANG
1030 template <class _Arg>
1031 _LIBCPP_INLINE_VISIBILITY
1032 void __emplace_back(_Arg&& __arg) { emplace_back(_VSTD::forward<_Arg>(__arg)); }
1033#else
1034 _LIBCPP_INLINE_VISIBILITY
1035 void __emplace_back(value_type const& __arg) { push_back(__arg); }
1036#endif
1037
1038 iterator insert(const_iterator __p, const value_type& __x);
1039 iterator insert(const_iterator __p, size_type __n, const value_type& __x);
1040 template <class _InpIter>
1041 iterator insert(const_iterator __p, _InpIter __f, _InpIter __l,
1042 typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type* = 0);
1043
1044 _LIBCPP_INLINE_VISIBILITY
1045 void swap(list& __c)
1046#if _LIBCPP_STD_VER >= 14
1047 _NOEXCEPT
1048#else
1049 _NOEXCEPT_(!__node_alloc_traits::propagate_on_container_swap::value ||
1050 __is_nothrow_swappable<__node_allocator>::value)
1051#endif
1052 {base::swap(__c);}
1053 _LIBCPP_INLINE_VISIBILITY
1054 void clear() _NOEXCEPT {base::clear();}
1055
1056 void pop_front();
1057 void pop_back();
1058
1059 iterator erase(const_iterator __p);
1060 iterator erase(const_iterator __f, const_iterator __l);
1061
1062 void resize(size_type __n);
1063 void resize(size_type __n, const value_type& __x);
1064
1065 void splice(const_iterator __p, list& __c);
1066#ifndef _LIBCPP_CXX03_LANG
1067 _LIBCPP_INLINE_VISIBILITY
1068 void splice(const_iterator __p, list&& __c) {splice(__p, __c);}
1069 _LIBCPP_INLINE_VISIBILITY
1070 void splice(const_iterator __p, list&& __c, const_iterator __i)
1071 {splice(__p, __c, __i);}
1072 _LIBCPP_INLINE_VISIBILITY
1073 void splice(const_iterator __p, list&& __c, const_iterator __f, const_iterator __l)
1074 {splice(__p, __c, __f, __l);}
1075#endif
1076 void splice(const_iterator __p, list& __c, const_iterator __i);
1077 void splice(const_iterator __p, list& __c, const_iterator __f, const_iterator __l);
1078
1079 __remove_return_type remove(const value_type& __x);
1080 template <class _Pred> __remove_return_type remove_if(_Pred __pred);
1081 _LIBCPP_INLINE_VISIBILITY
1082 __remove_return_type unique() { return unique(__equal_to<value_type>()); }
1083 template <class _BinaryPred>
1084 __remove_return_type unique(_BinaryPred __binary_pred);
1085 _LIBCPP_INLINE_VISIBILITY
1086 void merge(list& __c);
1087#ifndef _LIBCPP_CXX03_LANG
1088 _LIBCPP_INLINE_VISIBILITY
1089 void merge(list&& __c) {merge(__c);}
1090
1091 template <class _Comp>
1092 _LIBCPP_INLINE_VISIBILITY
1093 void merge(list&& __c, _Comp __comp) {merge(__c, __comp);}
1094#endif
1095 template <class _Comp>
1096 void merge(list& __c, _Comp __comp);
1097
1098 _LIBCPP_INLINE_VISIBILITY
1099 void sort();
1100 template <class _Comp>
1101 _LIBCPP_INLINE_VISIBILITY
1102 void sort(_Comp __comp);
1103
1104 void reverse() _NOEXCEPT;
1105
1106 bool __invariants() const;
1107
1108 typedef __allocator_destructor<__node_allocator> __node_destructor;
1109 typedef unique_ptr<__node, __node_destructor> __hold_pointer;
1110
1111 _LIBCPP_INLINE_VISIBILITY
1112 __hold_pointer __allocate_node(__node_allocator& __na) {
1113 __node_pointer __p = __node_alloc_traits::allocate(__na, 1);
1114 __p->__prev_ = nullptr;
1115 return __hold_pointer(__p, __node_destructor(__na, 1));
1116 }
1117
1118#if _LIBCPP_DEBUG_LEVEL >= 2
1119
1120 bool __dereferenceable(const const_iterator* __i) const;
1121 bool __decrementable(const const_iterator* __i) const;
1122 bool __addable(const const_iterator* __i, ptrdiff_t __n) const;
1123 bool __subscriptable(const const_iterator* __i, ptrdiff_t __n) const;
1124
1125#endif // _LIBCPP_DEBUG_LEVEL >= 2
1126
1127private:
1128 _LIBCPP_INLINE_VISIBILITY
1129 static void __link_nodes (__link_pointer __p, __link_pointer __f, __link_pointer __l);
1130 _LIBCPP_INLINE_VISIBILITY
1131 void __link_nodes_at_front(__link_pointer __f, __link_pointer __l);
1132 _LIBCPP_INLINE_VISIBILITY
1133 void __link_nodes_at_back (__link_pointer __f, __link_pointer __l);
1134 iterator __iterator(size_type __n);
1135 template <class _Comp>
1136 static iterator __sort(iterator __f1, iterator __e2, size_type __n, _Comp& __comp);
1137
1138 void __move_assign(list& __c, true_type)
1139 _NOEXCEPT_(is_nothrow_move_assignable<__node_allocator>::value);
1140 void __move_assign(list& __c, false_type);
1141};
1142
1143#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES
1144template<class _InputIterator,
1145 class _Alloc = typename std::allocator<typename iterator_traits<_InputIterator>::value_type>,
1146 class = typename enable_if<__is_allocator<_Alloc>::value, void>::type
1147 >
1148list(_InputIterator, _InputIterator)
1149 -> list<typename iterator_traits<_InputIterator>::value_type, _Alloc>;
1150
1151template<class _InputIterator,
1152 class _Alloc,
1153 class = typename enable_if<__is_allocator<_Alloc>::value, void>::type
1154 >
1155list(_InputIterator, _InputIterator, _Alloc)
1156 -> list<typename iterator_traits<_InputIterator>::value_type, _Alloc>;
1157#endif
1158
1159// Link in nodes [__f, __l] just prior to __p
1160template <class _Tp, class _Alloc>
1161inline
1162void
1163list<_Tp, _Alloc>::__link_nodes(__link_pointer __p, __link_pointer __f, __link_pointer __l)
1164{
1165 __p->__prev_->__next_ = __f;
1166 __f->__prev_ = __p->__prev_;
1167 __p->__prev_ = __l;
1168 __l->__next_ = __p;
1169}
1170
1171// Link in nodes [__f, __l] at the front of the list
1172template <class _Tp, class _Alloc>
1173inline
1174void
1175list<_Tp, _Alloc>::__link_nodes_at_front(__link_pointer __f, __link_pointer __l)
1176{
1177 __f->__prev_ = base::__end_as_link();
1178 __l->__next_ = base::__end_.__next_;
1179 __l->__next_->__prev_ = __l;
1180 base::__end_.__next_ = __f;
1181}
1182
1183// Link in nodes [__f, __l] at the back of the list
1184template <class _Tp, class _Alloc>
1185inline
1186void
1187list<_Tp, _Alloc>::__link_nodes_at_back(__link_pointer __f, __link_pointer __l)
1188{
1189 __l->__next_ = base::__end_as_link();
1190 __f->__prev_ = base::__end_.__prev_;
1191 __f->__prev_->__next_ = __f;
1192 base::__end_.__prev_ = __l;
1193}
1194
1195
1196template <class _Tp, class _Alloc>
1197inline
1198typename list<_Tp, _Alloc>::iterator
1199list<_Tp, _Alloc>::__iterator(size_type __n)
1200{
1201 return __n <= base::__sz() / 2 ? _VSTD::next(begin(), __n)
1202 : _VSTD::prev(end(), base::__sz() - __n);
1203}
1204
1205template <class _Tp, class _Alloc>
1206list<_Tp, _Alloc>::list(size_type __n)
1207{
1208#if _LIBCPP_DEBUG_LEVEL >= 2
1209 __get_db()->__insert_c(this);
1210#endif
1211 for (; __n > 0; --__n)
1212#ifndef _LIBCPP_CXX03_LANG
1213 emplace_back();
1214#else
1215 push_back(value_type());
1216#endif
1217}
1218
1219#if _LIBCPP_STD_VER > 11
1220template <class _Tp, class _Alloc>
1221list<_Tp, _Alloc>::list(size_type __n, const allocator_type& __a) : base(__a)
1222{
1223#if _LIBCPP_DEBUG_LEVEL >= 2
1224 __get_db()->__insert_c(this);
1225#endif
1226 for (; __n > 0; --__n)
1227 emplace_back();
1228}
1229#endif
1230
1231template <class _Tp, class _Alloc>
1232list<_Tp, _Alloc>::list(size_type __n, const value_type& __x)
1233{
1234#if _LIBCPP_DEBUG_LEVEL >= 2
1235 __get_db()->__insert_c(this);
1236#endif
1237 for (; __n > 0; --__n)
1238 push_back(__x);
1239}
1240
1241template <class _Tp, class _Alloc>
1242list<_Tp, _Alloc>::list(size_type __n, const value_type& __x, const allocator_type& __a)
1243 : base(__a)
1244{
1245#if _LIBCPP_DEBUG_LEVEL >= 2
1246 __get_db()->__insert_c(this);
1247#endif
1248 for (; __n > 0; --__n)
1249 push_back(__x);
1250}
1251
1252template <class _Tp, class _Alloc>
1253template <class _InpIter>
1254list<_Tp, _Alloc>::list(_InpIter __f, _InpIter __l,
1255 typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type*)
1256{
1257#if _LIBCPP_DEBUG_LEVEL >= 2
1258 __get_db()->__insert_c(this);
1259#endif
1260 for (; __f != __l; ++__f)
1261 __emplace_back(*__f);
1262}
1263
1264template <class _Tp, class _Alloc>
1265template <class _InpIter>
1266list<_Tp, _Alloc>::list(_InpIter __f, _InpIter __l, const allocator_type& __a,
1267 typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type*)
1268 : base(__a)
1269{
1270#if _LIBCPP_DEBUG_LEVEL >= 2
1271 __get_db()->__insert_c(this);
1272#endif
1273 for (; __f != __l; ++__f)
1274 __emplace_back(*__f);
1275}
1276
1277template <class _Tp, class _Alloc>
1278list<_Tp, _Alloc>::list(const list& __c)
1279 : base(__node_alloc_traits::select_on_container_copy_construction(
1280 __c.__node_alloc())) {
1281#if _LIBCPP_DEBUG_LEVEL >= 2
1282 __get_db()->__insert_c(this);
1283#endif
1284 for (const_iterator __i = __c.begin(), __e = __c.end(); __i != __e; ++__i)
1285 push_back(*__i);
1286}
1287
1288template <class _Tp, class _Alloc>
1289list<_Tp, _Alloc>::list(const list& __c, const allocator_type& __a)
1290 : base(__a)
1291{
1292#if _LIBCPP_DEBUG_LEVEL >= 2
1293 __get_db()->__insert_c(this);
1294#endif
1295 for (const_iterator __i = __c.begin(), __e = __c.end(); __i != __e; ++__i)
1296 push_back(*__i);
1297}
1298
1299#ifndef _LIBCPP_CXX03_LANG
1300
1301template <class _Tp, class _Alloc>
1302list<_Tp, _Alloc>::list(initializer_list<value_type> __il, const allocator_type& __a)
1303 : base(__a)
1304{
1305#if _LIBCPP_DEBUG_LEVEL >= 2
1306 __get_db()->__insert_c(this);
1307#endif
1308 for (typename initializer_list<value_type>::const_iterator __i = __il.begin(),
1309 __e = __il.end(); __i != __e; ++__i)
1310 push_back(*__i);
1311}
1312
1313template <class _Tp, class _Alloc>
1314list<_Tp, _Alloc>::list(initializer_list<value_type> __il)
1315{
1316#if _LIBCPP_DEBUG_LEVEL >= 2
1317 __get_db()->__insert_c(this);
1318#endif
1319 for (typename initializer_list<value_type>::const_iterator __i = __il.begin(),
1320 __e = __il.end(); __i != __e; ++__i)
1321 push_back(*__i);
1322}
1323
1324template <class _Tp, class _Alloc>
1325inline list<_Tp, _Alloc>::list(list&& __c)
1326 _NOEXCEPT_(is_nothrow_move_constructible<__node_allocator>::value)
1327 : base(_VSTD::move(__c.__node_alloc())) {
1328#if _LIBCPP_DEBUG_LEVEL >= 2
1329 __get_db()->__insert_c(this);
1330#endif
1331 splice(end(), __c);
1332}
1333
1334template <class _Tp, class _Alloc>
1335inline
1336list<_Tp, _Alloc>::list(list&& __c, const allocator_type& __a)
1337 : base(__a)
1338{
1339#if _LIBCPP_DEBUG_LEVEL >= 2
1340 __get_db()->__insert_c(this);
1341#endif
1342 if (__a == __c.get_allocator())
1343 splice(end(), __c);
1344 else
1345 {
1346 typedef move_iterator<iterator> _Ip;
1347 assign(_Ip(__c.begin()), _Ip(__c.end()));
1348 }
1349}
1350
1351template <class _Tp, class _Alloc>
1352inline
1353list<_Tp, _Alloc>&
1354list<_Tp, _Alloc>::operator=(list&& __c)
1355 _NOEXCEPT_(
1356 __node_alloc_traits::propagate_on_container_move_assignment::value &&
1357 is_nothrow_move_assignable<__node_allocator>::value)
1358{
1359 __move_assign(__c, integral_constant<bool,
1360 __node_alloc_traits::propagate_on_container_move_assignment::value>());
1361 return *this;
1362}
1363
1364template <class _Tp, class _Alloc>
1365void
1366list<_Tp, _Alloc>::__move_assign(list& __c, false_type)
1367{
1368 if (base::__node_alloc() != __c.__node_alloc())
1369 {
1370 typedef move_iterator<iterator> _Ip;
1371 assign(_Ip(__c.begin()), _Ip(__c.end()));
1372 }
1373 else
1374 __move_assign(__c, true_type());
1375}
1376
1377template <class _Tp, class _Alloc>
1378void
1379list<_Tp, _Alloc>::__move_assign(list& __c, true_type)
1380 _NOEXCEPT_(is_nothrow_move_assignable<__node_allocator>::value)
1381{
1382 clear();
1383 base::__move_assign_alloc(__c);
1384 splice(end(), __c);
1385}
1386
1387#endif // _LIBCPP_CXX03_LANG
1388
1389template <class _Tp, class _Alloc>
1390inline
1391list<_Tp, _Alloc>&
1392list<_Tp, _Alloc>::operator=(const list& __c)
1393{
1394 if (this != &__c)
1395 {
1396 base::__copy_assign_alloc(__c);
1397 assign(__c.begin(), __c.end());
1398 }
1399 return *this;
1400}
1401
1402template <class _Tp, class _Alloc>
1403template <class _InpIter>
1404void
1405list<_Tp, _Alloc>::assign(_InpIter __f, _InpIter __l,
1406 typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type*)
1407{
1408 iterator __i = begin();
1409 iterator __e = end();
1410 for (; __f != __l && __i != __e; ++__f, ++__i)
1411 *__i = *__f;
1412 if (__i == __e)
1413 insert(__e, __f, __l);
1414 else
1415 erase(__i, __e);
1416#if _LIBCPP_DEBUG_LEVEL >= 2
1417 __get_db()->__invalidate_all(this);
1418#endif
1419}
1420
1421template <class _Tp, class _Alloc>
1422void
1423list<_Tp, _Alloc>::assign(size_type __n, const value_type& __x)
1424{
1425 iterator __i = begin();
1426 iterator __e = end();
1427 for (; __n > 0 && __i != __e; --__n, ++__i)
1428 *__i = __x;
1429 if (__i == __e)
1430 insert(__e, __n, __x);
1431 else
1432 erase(__i, __e);
1433#if _LIBCPP_DEBUG_LEVEL >= 2
1434 __get_db()->__invalidate_all(this);
1435#endif
1436}
1437
1438template <class _Tp, class _Alloc>
1439inline
1440_Alloc
1441list<_Tp, _Alloc>::get_allocator() const _NOEXCEPT
1442{
1443 return allocator_type(base::__node_alloc());
1444}
1445
1446template <class _Tp, class _Alloc>
1447typename list<_Tp, _Alloc>::iterator
1448list<_Tp, _Alloc>::insert(const_iterator __p, const value_type& __x)
1449{
1450#if _LIBCPP_DEBUG_LEVEL >= 2
1451 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
1452 "list::insert(iterator, x) called with an iterator not"
1453 " referring to this list");
1454#endif
1455 __node_allocator& __na = base::__node_alloc();
1456 __hold_pointer __hold = __allocate_node(__na);
1457 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), __x);
1458 __link_nodes(__p.__ptr_, __hold->__as_link(), __hold->__as_link());
1459 ++base::__sz();
1460#if _LIBCPP_DEBUG_LEVEL >= 2
1461 return iterator(__hold.release()->__as_link(), this);
1462#else
1463 return iterator(__hold.release()->__as_link());
1464#endif
1465}
1466
1467template <class _Tp, class _Alloc>
1468typename list<_Tp, _Alloc>::iterator
1469list<_Tp, _Alloc>::insert(const_iterator __p, size_type __n, const value_type& __x)
1470{
1471#if _LIBCPP_DEBUG_LEVEL >= 2
1472 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
1473 "list::insert(iterator, n, x) called with an iterator not"
1474 " referring to this list");
1475 iterator __r(__p.__ptr_, this);
1476#else
1477 iterator __r(__p.__ptr_);
1478#endif
1479 if (__n > 0)
1480 {
1481 size_type __ds = 0;
1482 __node_allocator& __na = base::__node_alloc();
1483 __hold_pointer __hold = __allocate_node(__na);
1484 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), __x);
1485 ++__ds;
1486#if _LIBCPP_DEBUG_LEVEL >= 2
1487 __r = iterator(__hold->__as_link(), this);
1488#else
1489 __r = iterator(__hold->__as_link());
1490#endif
1491 __hold.release();
1492 iterator __e = __r;
1493#ifndef _LIBCPP_NO_EXCEPTIONS
1494 try
1495 {
1496#endif // _LIBCPP_NO_EXCEPTIONS
1497 for (--__n; __n != 0; --__n, ++__e, ++__ds)
1498 {
1499 __hold.reset(__node_alloc_traits::allocate(__na, 1));
1500 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), __x);
1501 __e.__ptr_->__next_ = __hold->__as_link();
1502 __hold->__prev_ = __e.__ptr_;
1503 __hold.release();
1504 }
1505#ifndef _LIBCPP_NO_EXCEPTIONS
1506 }
1507 catch (...)
1508 {
1509 while (true)
1510 {
1511 __node_alloc_traits::destroy(__na, _VSTD::addressof(*__e));
1512 __link_pointer __prev = __e.__ptr_->__prev_;
1513 __node_alloc_traits::deallocate(__na, __e.__ptr_->__as_node(), 1);
1514 if (__prev == 0)
1515 break;
1516#if _LIBCPP_DEBUG_LEVEL >= 2
1517 __e = iterator(__prev, this);
1518#else
1519 __e = iterator(__prev);
1520#endif
1521 }
1522 throw;
1523 }
1524#endif // _LIBCPP_NO_EXCEPTIONS
1525 __link_nodes(__p.__ptr_, __r.__ptr_, __e.__ptr_);
1526 base::__sz() += __ds;
1527 }
1528 return __r;
1529}
1530
1531template <class _Tp, class _Alloc>
1532template <class _InpIter>
1533typename list<_Tp, _Alloc>::iterator
1534list<_Tp, _Alloc>::insert(const_iterator __p, _InpIter __f, _InpIter __l,
1535 typename enable_if<__is_cpp17_input_iterator<_InpIter>::value>::type*)
1536{
1537#if _LIBCPP_DEBUG_LEVEL >= 2
1538 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
1539 "list::insert(iterator, range) called with an iterator not"
1540 " referring to this list");
1541 iterator __r(__p.__ptr_, this);
1542#else
1543 iterator __r(__p.__ptr_);
1544#endif
1545 if (__f != __l)
1546 {
1547 size_type __ds = 0;
1548 __node_allocator& __na = base::__node_alloc();
1549 __hold_pointer __hold = __allocate_node(__na);
1550 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), *__f);
1551 ++__ds;
1552#if _LIBCPP_DEBUG_LEVEL >= 2
1553 __r = iterator(__hold.get()->__as_link(), this);
1554#else
1555 __r = iterator(__hold.get()->__as_link());
1556#endif
1557 __hold.release();
1558 iterator __e = __r;
1559#ifndef _LIBCPP_NO_EXCEPTIONS
1560 try
1561 {
1562#endif // _LIBCPP_NO_EXCEPTIONS
1563 for (++__f; __f != __l; ++__f, (void) ++__e, (void) ++__ds)
1564 {
1565 __hold.reset(__node_alloc_traits::allocate(__na, 1));
1566 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), *__f);
1567 __e.__ptr_->__next_ = __hold.get()->__as_link();
1568 __hold->__prev_ = __e.__ptr_;
1569 __hold.release();
1570 }
1571#ifndef _LIBCPP_NO_EXCEPTIONS
1572 }
1573 catch (...)
1574 {
1575 while (true)
1576 {
1577 __node_alloc_traits::destroy(__na, _VSTD::addressof(*__e));
1578 __link_pointer __prev = __e.__ptr_->__prev_;
1579 __node_alloc_traits::deallocate(__na, __e.__ptr_->__as_node(), 1);
1580 if (__prev == 0)
1581 break;
1582#if _LIBCPP_DEBUG_LEVEL >= 2
1583 __e = iterator(__prev, this);
1584#else
1585 __e = iterator(__prev);
1586#endif
1587 }
1588 throw;
1589 }
1590#endif // _LIBCPP_NO_EXCEPTIONS
1591 __link_nodes(__p.__ptr_, __r.__ptr_, __e.__ptr_);
1592 base::__sz() += __ds;
1593 }
1594 return __r;
1595}
1596
1597template <class _Tp, class _Alloc>
1598void
1599list<_Tp, _Alloc>::push_front(const value_type& __x)
1600{
1601 __node_allocator& __na = base::__node_alloc();
1602 __hold_pointer __hold = __allocate_node(__na);
1603 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), __x);
1604 __link_pointer __nl = __hold->__as_link();
1605 __link_nodes_at_front(__nl, __nl);
1606 ++base::__sz();
1607 __hold.release();
1608}
1609
1610template <class _Tp, class _Alloc>
1611void
1612list<_Tp, _Alloc>::push_back(const value_type& __x)
1613{
1614 __node_allocator& __na = base::__node_alloc();
1615 __hold_pointer __hold = __allocate_node(__na);
1616 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), __x);
1617 __link_nodes_at_back(__hold.get()->__as_link(), __hold.get()->__as_link());
1618 ++base::__sz();
1619 __hold.release();
1620}
1621
1622#ifndef _LIBCPP_CXX03_LANG
1623
1624template <class _Tp, class _Alloc>
1625void
1626list<_Tp, _Alloc>::push_front(value_type&& __x)
1627{
1628 __node_allocator& __na = base::__node_alloc();
1629 __hold_pointer __hold = __allocate_node(__na);
1630 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), _VSTD::move(__x));
1631 __link_nodes_at_front(__hold.get()->__as_link(), __hold.get()->__as_link());
1632 ++base::__sz();
1633 __hold.release();
1634}
1635
1636template <class _Tp, class _Alloc>
1637void
1638list<_Tp, _Alloc>::push_back(value_type&& __x)
1639{
1640 __node_allocator& __na = base::__node_alloc();
1641 __hold_pointer __hold = __allocate_node(__na);
1642 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), _VSTD::move(__x));
1643 __link_nodes_at_back(__hold.get()->__as_link(), __hold.get()->__as_link());
1644 ++base::__sz();
1645 __hold.release();
1646}
1647
1648template <class _Tp, class _Alloc>
1649template <class... _Args>
1650#if _LIBCPP_STD_VER > 14
1651typename list<_Tp, _Alloc>::reference
1652#else
1653void
1654#endif
1655list<_Tp, _Alloc>::emplace_front(_Args&&... __args)
1656{
1657 __node_allocator& __na = base::__node_alloc();
1658 __hold_pointer __hold = __allocate_node(__na);
1659 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), _VSTD::forward<_Args>(__args)...);
1660 __link_nodes_at_front(__hold.get()->__as_link(), __hold.get()->__as_link());
1661 ++base::__sz();
1662#if _LIBCPP_STD_VER > 14
1663 return __hold.release()->__value_;
1664#else
1665 __hold.release();
1666#endif
1667}
1668
1669template <class _Tp, class _Alloc>
1670template <class... _Args>
1671#if _LIBCPP_STD_VER > 14
1672typename list<_Tp, _Alloc>::reference
1673#else
1674void
1675#endif
1676list<_Tp, _Alloc>::emplace_back(_Args&&... __args)
1677{
1678 __node_allocator& __na = base::__node_alloc();
1679 __hold_pointer __hold = __allocate_node(__na);
1680 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), _VSTD::forward<_Args>(__args)...);
1681 __link_pointer __nl = __hold->__as_link();
1682 __link_nodes_at_back(__nl, __nl);
1683 ++base::__sz();
1684#if _LIBCPP_STD_VER > 14
1685 return __hold.release()->__value_;
1686#else
1687 __hold.release();
1688#endif
1689}
1690
1691template <class _Tp, class _Alloc>
1692template <class... _Args>
1693typename list<_Tp, _Alloc>::iterator
1694list<_Tp, _Alloc>::emplace(const_iterator __p, _Args&&... __args)
1695{
1696#if _LIBCPP_DEBUG_LEVEL >= 2
1697 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
1698 "list::emplace(iterator, args...) called with an iterator not"
1699 " referring to this list");
1700#endif
1701 __node_allocator& __na = base::__node_alloc();
1702 __hold_pointer __hold = __allocate_node(__na);
1703 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), _VSTD::forward<_Args>(__args)...);
1704 __link_pointer __nl = __hold.get()->__as_link();
1705 __link_nodes(__p.__ptr_, __nl, __nl);
1706 ++base::__sz();
1707 __hold.release();
1708#if _LIBCPP_DEBUG_LEVEL >= 2
1709 return iterator(__nl, this);
1710#else
1711 return iterator(__nl);
1712#endif
1713}
1714
1715template <class _Tp, class _Alloc>
1716typename list<_Tp, _Alloc>::iterator
1717list<_Tp, _Alloc>::insert(const_iterator __p, value_type&& __x)
1718{
1719#if _LIBCPP_DEBUG_LEVEL >= 2
1720 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
1721 "list::insert(iterator, x) called with an iterator not"
1722 " referring to this list");
1723#endif
1724 __node_allocator& __na = base::__node_alloc();
1725 __hold_pointer __hold = __allocate_node(__na);
1726 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), _VSTD::move(__x));
1727 __link_pointer __nl = __hold->__as_link();
1728 __link_nodes(__p.__ptr_, __nl, __nl);
1729 ++base::__sz();
1730 __hold.release();
1731#if _LIBCPP_DEBUG_LEVEL >= 2
1732 return iterator(__nl, this);
1733#else
1734 return iterator(__nl);
1735#endif
1736}
1737
1738#endif // _LIBCPP_CXX03_LANG
1739
1740template <class _Tp, class _Alloc>
1741void
1742list<_Tp, _Alloc>::pop_front()
1743{
1744 _LIBCPP_ASSERT(!empty(), "list::pop_front() called with empty list");
1745 __node_allocator& __na = base::__node_alloc();
1746 __link_pointer __n = base::__end_.__next_;
1747 base::__unlink_nodes(__n, __n);
1748 --base::__sz();
1749#if _LIBCPP_DEBUG_LEVEL >= 2
1750 __c_node* __c = __get_db()->__find_c_and_lock(this);
1751 for (__i_node** __p = __c->end_; __p != __c->beg_; )
1752 {
1753 --__p;
1754 iterator* __i = static_cast<iterator*>((*__p)->__i_);
1755 if (__i->__ptr_ == __n)
1756 {
1757 (*__p)->__c_ = nullptr;
1758 if (--__c->end_ != __p)
1759 memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
1760 }
1761 }
1762 __get_db()->unlock();
1763#endif
1764 __node_pointer __np = __n->__as_node();
1765 __node_alloc_traits::destroy(__na, _VSTD::addressof(__np->__value_));
1766 __node_alloc_traits::deallocate(__na, __np, 1);
1767}
1768
1769template <class _Tp, class _Alloc>
1770void
1771list<_Tp, _Alloc>::pop_back()
1772{
1773 _LIBCPP_ASSERT(!empty(), "list::pop_back() called with empty list");
1774 __node_allocator& __na = base::__node_alloc();
1775 __link_pointer __n = base::__end_.__prev_;
1776 base::__unlink_nodes(__n, __n);
1777 --base::__sz();
1778#if _LIBCPP_DEBUG_LEVEL >= 2
1779 __c_node* __c = __get_db()->__find_c_and_lock(this);
1780 for (__i_node** __p = __c->end_; __p != __c->beg_; )
1781 {
1782 --__p;
1783 iterator* __i = static_cast<iterator*>((*__p)->__i_);
1784 if (__i->__ptr_ == __n)
1785 {
1786 (*__p)->__c_ = nullptr;
1787 if (--__c->end_ != __p)
1788 memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
1789 }
1790 }
1791 __get_db()->unlock();
1792#endif
1793 __node_pointer __np = __n->__as_node();
1794 __node_alloc_traits::destroy(__na, _VSTD::addressof(__np->__value_));
1795 __node_alloc_traits::deallocate(__na, __np, 1);
1796}
1797
1798template <class _Tp, class _Alloc>
1799typename list<_Tp, _Alloc>::iterator
1800list<_Tp, _Alloc>::erase(const_iterator __p)
1801{
1802#if _LIBCPP_DEBUG_LEVEL >= 2
1803 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
1804 "list::erase(iterator) called with an iterator not"
1805 " referring to this list");
1806#endif
1807 _LIBCPP_ASSERT(__p != end(),
1808 "list::erase(iterator) called with a non-dereferenceable iterator");
1809 __node_allocator& __na = base::__node_alloc();
1810 __link_pointer __n = __p.__ptr_;
1811 __link_pointer __r = __n->__next_;
1812 base::__unlink_nodes(__n, __n);
1813 --base::__sz();
1814#if _LIBCPP_DEBUG_LEVEL >= 2
1815 __c_node* __c = __get_db()->__find_c_and_lock(this);
1816 for (__i_node** __ip = __c->end_; __ip != __c->beg_; )
1817 {
1818 --__ip;
1819 iterator* __i = static_cast<iterator*>((*__ip)->__i_);
1820 if (__i->__ptr_ == __n)
1821 {
1822 (*__ip)->__c_ = nullptr;
1823 if (--__c->end_ != __ip)
1824 memmove(__ip, __ip+1, (__c->end_ - __ip)*sizeof(__i_node*));
1825 }
1826 }
1827 __get_db()->unlock();
1828#endif
1829 __node_pointer __np = __n->__as_node();
1830 __node_alloc_traits::destroy(__na, _VSTD::addressof(__np->__value_));
1831 __node_alloc_traits::deallocate(__na, __np, 1);
1832#if _LIBCPP_DEBUG_LEVEL >= 2
1833 return iterator(__r, this);
1834#else
1835 return iterator(__r);
1836#endif
1837}
1838
1839template <class _Tp, class _Alloc>
1840typename list<_Tp, _Alloc>::iterator
1841list<_Tp, _Alloc>::erase(const_iterator __f, const_iterator __l)
1842{
1843#if _LIBCPP_DEBUG_LEVEL >= 2
1844 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__f) == this,
1845 "list::erase(iterator, iterator) called with an iterator not"
1846 " referring to this list");
1847 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__l) == this,
1848 "list::erase(iterator, iterator) called with an iterator not"
1849 " referring to this list");
1850#endif
1851 if (__f != __l)
1852 {
1853 __node_allocator& __na = base::__node_alloc();
1854 base::__unlink_nodes(__f.__ptr_, __l.__ptr_->__prev_);
1855 while (__f != __l)
1856 {
1857 __link_pointer __n = __f.__ptr_;
1858 ++__f;
1859 --base::__sz();
1860#if _LIBCPP_DEBUG_LEVEL >= 2
1861 __c_node* __c = __get_db()->__find_c_and_lock(this);
1862 for (__i_node** __p = __c->end_; __p != __c->beg_; )
1863 {
1864 --__p;
1865 iterator* __i = static_cast<iterator*>((*__p)->__i_);
1866 if (__i->__ptr_ == __n)
1867 {
1868 (*__p)->__c_ = nullptr;
1869 if (--__c->end_ != __p)
1870 memmove(__p, __p+1, (__c->end_ - __p)*sizeof(__i_node*));
1871 }
1872 }
1873 __get_db()->unlock();
1874#endif
1875 __node_pointer __np = __n->__as_node();
1876 __node_alloc_traits::destroy(__na, _VSTD::addressof(__np->__value_));
1877 __node_alloc_traits::deallocate(__na, __np, 1);
1878 }
1879 }
1880#if _LIBCPP_DEBUG_LEVEL >= 2
1881 return iterator(__l.__ptr_, this);
1882#else
1883 return iterator(__l.__ptr_);
1884#endif
1885}
1886
1887template <class _Tp, class _Alloc>
1888void
1889list<_Tp, _Alloc>::resize(size_type __n)
1890{
1891 if (__n < base::__sz())
1892 erase(__iterator(__n), end());
1893 else if (__n > base::__sz())
1894 {
1895 __n -= base::__sz();
1896 size_type __ds = 0;
1897 __node_allocator& __na = base::__node_alloc();
1898 __hold_pointer __hold = __allocate_node(__na);
1899 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_));
1900 ++__ds;
1901#if _LIBCPP_DEBUG_LEVEL >= 2
1902 iterator __r = iterator(__hold.release()->__as_link(), this);
1903#else
1904 iterator __r = iterator(__hold.release()->__as_link());
1905#endif
1906 iterator __e = __r;
1907#ifndef _LIBCPP_NO_EXCEPTIONS
1908 try
1909 {
1910#endif // _LIBCPP_NO_EXCEPTIONS
1911 for (--__n; __n != 0; --__n, ++__e, ++__ds)
1912 {
1913 __hold.reset(__node_alloc_traits::allocate(__na, 1));
1914 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_));
1915 __e.__ptr_->__next_ = __hold.get()->__as_link();
1916 __hold->__prev_ = __e.__ptr_;
1917 __hold.release();
1918 }
1919#ifndef _LIBCPP_NO_EXCEPTIONS
1920 }
1921 catch (...)
1922 {
1923 while (true)
1924 {
1925 __node_alloc_traits::destroy(__na, _VSTD::addressof(*__e));
1926 __link_pointer __prev = __e.__ptr_->__prev_;
1927 __node_alloc_traits::deallocate(__na, __e.__ptr_->__as_node(), 1);
1928 if (__prev == 0)
1929 break;
1930#if _LIBCPP_DEBUG_LEVEL >= 2
1931 __e = iterator(__prev, this);
1932#else
1933 __e = iterator(__prev);
1934#endif
1935 }
1936 throw;
1937 }
1938#endif // _LIBCPP_NO_EXCEPTIONS
1939 __link_nodes_at_back(__r.__ptr_, __e.__ptr_);
1940 base::__sz() += __ds;
1941 }
1942}
1943
1944template <class _Tp, class _Alloc>
1945void
1946list<_Tp, _Alloc>::resize(size_type __n, const value_type& __x)
1947{
1948 if (__n < base::__sz())
1949 erase(__iterator(__n), end());
1950 else if (__n > base::__sz())
1951 {
1952 __n -= base::__sz();
1953 size_type __ds = 0;
1954 __node_allocator& __na = base::__node_alloc();
1955 __hold_pointer __hold = __allocate_node(__na);
1956 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), __x);
1957 ++__ds;
1958 __link_pointer __nl = __hold.release()->__as_link();
1959#if _LIBCPP_DEBUG_LEVEL >= 2
1960 iterator __r = iterator(__nl, this);
1961#else
1962 iterator __r = iterator(__nl);
1963#endif
1964 iterator __e = __r;
1965#ifndef _LIBCPP_NO_EXCEPTIONS
1966 try
1967 {
1968#endif // _LIBCPP_NO_EXCEPTIONS
1969 for (--__n; __n != 0; --__n, ++__e, ++__ds)
1970 {
1971 __hold.reset(__node_alloc_traits::allocate(__na, 1));
1972 __node_alloc_traits::construct(__na, _VSTD::addressof(__hold->__value_), __x);
1973 __e.__ptr_->__next_ = __hold.get()->__as_link();
1974 __hold->__prev_ = __e.__ptr_;
1975 __hold.release();
1976 }
1977#ifndef _LIBCPP_NO_EXCEPTIONS
1978 }
1979 catch (...)
1980 {
1981 while (true)
1982 {
1983 __node_alloc_traits::destroy(__na, _VSTD::addressof(*__e));
1984 __link_pointer __prev = __e.__ptr_->__prev_;
1985 __node_alloc_traits::deallocate(__na, __e.__ptr_->__as_node(), 1);
1986 if (__prev == 0)
1987 break;
1988#if _LIBCPP_DEBUG_LEVEL >= 2
1989 __e = iterator(__prev, this);
1990#else
1991 __e = iterator(__prev);
1992#endif
1993 }
1994 throw;
1995 }
1996#endif // _LIBCPP_NO_EXCEPTIONS
1997 __link_nodes(base::__end_as_link(), __r.__ptr_, __e.__ptr_);
1998 base::__sz() += __ds;
1999 }
2000}
2001
2002template <class _Tp, class _Alloc>
2003void
2004list<_Tp, _Alloc>::splice(const_iterator __p, list& __c)
2005{
2006 _LIBCPP_ASSERT(this != &__c,
2007 "list::splice(iterator, list) called with this == &list");
2008#if _LIBCPP_DEBUG_LEVEL >= 2
2009 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
2010 "list::splice(iterator, list) called with an iterator not"
2011 " referring to this list");
2012#endif
2013 if (!__c.empty())
2014 {
2015 __link_pointer __f = __c.__end_.__next_;
2016 __link_pointer __l = __c.__end_.__prev_;
2017 base::__unlink_nodes(__f, __l);
2018 __link_nodes(__p.__ptr_, __f, __l);
2019 base::__sz() += __c.__sz();
2020 __c.__sz() = 0;
2021#if _LIBCPP_DEBUG_LEVEL >= 2
2022 if (&__c != this) {
2023 __libcpp_db* __db = __get_db();
2024 __c_node* __cn1 = __db->__find_c_and_lock(this);
2025 __c_node* __cn2 = __db->__find_c(&__c);
2026 for (__i_node** __ip = __cn2->end_; __ip != __cn2->beg_;)
2027 {
2028 --__ip;
2029 iterator* __i = static_cast<iterator*>((*__ip)->__i_);
2030 if (__i->__ptr_ != __c.__end_as_link())
2031 {
2032 __cn1->__add(*__ip);
2033 (*__ip)->__c_ = __cn1;
2034 if (--__cn2->end_ != __ip)
2035 memmove(__ip, __ip+1, (__cn2->end_ - __ip)*sizeof(__i_node*));
2036 }
2037 }
2038 __db->unlock();
2039 }
2040#endif
2041 }
2042}
2043
2044template <class _Tp, class _Alloc>
2045void
2046list<_Tp, _Alloc>::splice(const_iterator __p, list& __c, const_iterator __i)
2047{
2048#if _LIBCPP_DEBUG_LEVEL >= 2
2049 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
2050 "list::splice(iterator, list, iterator) called with first iterator not"
2051 " referring to this list");
2052 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__i) == &__c,
2053 "list::splice(iterator, list, iterator) called with second iterator not"
2054 " referring to list argument");
2055 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(&__i),
2056 "list::splice(iterator, list, iterator) called with second iterator not"
2057 " derefereceable");
2058#endif
2059 if (__p.__ptr_ != __i.__ptr_ && __p.__ptr_ != __i.__ptr_->__next_)
2060 {
2061 __link_pointer __f = __i.__ptr_;
2062 base::__unlink_nodes(__f, __f);
2063 __link_nodes(__p.__ptr_, __f, __f);
2064 --__c.__sz();
2065 ++base::__sz();
2066#if _LIBCPP_DEBUG_LEVEL >= 2
2067 if (&__c != this) {
2068 __libcpp_db* __db = __get_db();
2069 __c_node* __cn1 = __db->__find_c_and_lock(this);
2070 __c_node* __cn2 = __db->__find_c(&__c);
2071 for (__i_node** __ip = __cn2->end_; __ip != __cn2->beg_;)
2072 {
2073 --__ip;
2074 iterator* __j = static_cast<iterator*>((*__ip)->__i_);
2075 if (__j->__ptr_ == __f)
2076 {
2077 __cn1->__add(*__ip);
2078 (*__ip)->__c_ = __cn1;
2079 if (--__cn2->end_ != __ip)
2080 memmove(__ip, __ip+1, (__cn2->end_ - __ip)*sizeof(__i_node*));
2081 }
2082 }
2083 __db->unlock();
2084 }
2085#endif
2086 }
2087}
2088
2089template <class _Tp, class _Alloc>
2090void
2091list<_Tp, _Alloc>::splice(const_iterator __p, list& __c, const_iterator __f, const_iterator __l)
2092{
2093#if _LIBCPP_DEBUG_LEVEL >= 2
2094 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__p) == this,
2095 "list::splice(iterator, list, iterator, iterator) called with first iterator not"
2096 " referring to this list");
2097 _LIBCPP_ASSERT(__get_const_db()->__find_c_from_i(&__f) == &__c,
2098 "list::splice(iterator, list, iterator, iterator) called with second iterator not"
2099 " referring to list argument");
2100 if (this == &__c)
2101 {
2102 for (const_iterator __i = __f; __i != __l; ++__i)
2103 _LIBCPP_ASSERT(__i != __p,
2104 "list::splice(iterator, list, iterator, iterator)"
2105 " called with the first iterator within the range"
2106 " of the second and third iterators");
2107 }
2108#endif
2109 if (__f != __l)
2110 {
2111 __link_pointer __first = __f.__ptr_;
2112 --__l;
2113 __link_pointer __last = __l.__ptr_;
2114 if (this != &__c)
2115 {
2116 size_type __s = _VSTD::distance(__f, __l) + 1;
2117 __c.__sz() -= __s;
2118 base::__sz() += __s;
2119 }
2120 base::__unlink_nodes(__first, __last);
2121 __link_nodes(__p.__ptr_, __first, __last);
2122#if _LIBCPP_DEBUG_LEVEL >= 2
2123 if (&__c != this) {
2124 __libcpp_db* __db = __get_db();
2125 __c_node* __cn1 = __db->__find_c_and_lock(this);
2126 __c_node* __cn2 = __db->__find_c(&__c);
2127 for (__i_node** __ip = __cn2->end_; __ip != __cn2->beg_;)
2128 {
2129 --__ip;
2130 iterator* __j = static_cast<iterator*>((*__ip)->__i_);
2131 for (__link_pointer __k = __f.__ptr_;
2132 __k != __l.__ptr_; __k = __k->__next_)
2133 {
2134 if (__j->__ptr_ == __k)
2135 {
2136 __cn1->__add(*__ip);
2137 (*__ip)->__c_ = __cn1;
2138 if (--__cn2->end_ != __ip)
2139 memmove(__ip, __ip+1, (__cn2->end_ - __ip)*sizeof(__i_node*));
2140 }
2141 }
2142 }
2143 __db->unlock();
2144 }
2145#endif
2146 }
2147}
2148
2149template <class _Tp, class _Alloc>
2150typename list<_Tp, _Alloc>::__remove_return_type
2151list<_Tp, _Alloc>::remove(const value_type& __x)
2152{
2153 list<_Tp, _Alloc> __deleted_nodes(get_allocator()); // collect the nodes we're removing
2154 for (const_iterator __i = begin(), __e = end(); __i != __e;)
2155 {
2156 if (*__i == __x)
2157 {
2158 const_iterator __j = _VSTD::next(__i);
2159 for (; __j != __e && *__j == __x; ++__j)
2160 ;
2161 __deleted_nodes.splice(__deleted_nodes.end(), *this, __i, __j);
2162 __i = __j;
2163 if (__i != __e)
2164 ++__i;
2165 }
2166 else
2167 ++__i;
2168 }
2169
2170 return (__remove_return_type) __deleted_nodes.size();
2171}
2172
2173template <class _Tp, class _Alloc>
2174template <class _Pred>
2175typename list<_Tp, _Alloc>::__remove_return_type
2176list<_Tp, _Alloc>::remove_if(_Pred __pred)
2177{
2178 list<_Tp, _Alloc> __deleted_nodes(get_allocator()); // collect the nodes we're removing
2179 for (iterator __i = begin(), __e = end(); __i != __e;)
2180 {
2181 if (__pred(*__i))
2182 {
2183 iterator __j = _VSTD::next(__i);
2184 for (; __j != __e && __pred(*__j); ++__j)
2185 ;
2186 __deleted_nodes.splice(__deleted_nodes.end(), *this, __i, __j);
2187 __i = __j;
2188 if (__i != __e)
2189 ++__i;
2190 }
2191 else
2192 ++__i;
2193 }
2194
2195 return (__remove_return_type) __deleted_nodes.size();
2196}
2197
2198template <class _Tp, class _Alloc>
2199template <class _BinaryPred>
2200typename list<_Tp, _Alloc>::__remove_return_type
2201list<_Tp, _Alloc>::unique(_BinaryPred __binary_pred)
2202{
2203 list<_Tp, _Alloc> __deleted_nodes(get_allocator()); // collect the nodes we're removing
2204 for (iterator __i = begin(), __e = end(); __i != __e;)
2205 {
2206 iterator __j = _VSTD::next(__i);
2207 for (; __j != __e && __binary_pred(*__i, *__j); ++__j)
2208 ;
2209 if (++__i != __j) {
2210 __deleted_nodes.splice(__deleted_nodes.end(), *this, __i, __j);
2211 __i = __j;
2212 }
2213 }
2214
2215 return (__remove_return_type) __deleted_nodes.size();
2216}
2217
2218template <class _Tp, class _Alloc>
2219inline
2220void
2221list<_Tp, _Alloc>::merge(list& __c)
2222{
2223 merge(__c, __less<value_type>());
2224}
2225
2226template <class _Tp, class _Alloc>
2227template <class _Comp>
2228void
2229list<_Tp, _Alloc>::merge(list& __c, _Comp __comp)
2230{
2231 if (this != _VSTD::addressof(__c))
2232 {
2233 iterator __f1 = begin();
2234 iterator __e1 = end();
2235 iterator __f2 = __c.begin();
2236 iterator __e2 = __c.end();
2237 while (__f1 != __e1 && __f2 != __e2)
2238 {
2239 if (__comp(*__f2, *__f1))
2240 {
2241 size_type __ds = 1;
2242 iterator __m2 = _VSTD::next(__f2);
2243 for (; __m2 != __e2 && __comp(*__m2, *__f1); ++__m2, ++__ds)
2244 ;
2245 base::__sz() += __ds;
2246 __c.__sz() -= __ds;
2247 __link_pointer __f = __f2.__ptr_;
2248 __link_pointer __l = __m2.__ptr_->__prev_;
2249 __f2 = __m2;
2250 base::__unlink_nodes(__f, __l);
2251 __m2 = _VSTD::next(__f1);
2252 __link_nodes(__f1.__ptr_, __f, __l);
2253 __f1 = __m2;
2254 }
2255 else
2256 ++__f1;
2257 }
2258 splice(__e1, __c);
2259#if _LIBCPP_DEBUG_LEVEL >= 2
2260 __libcpp_db* __db = __get_db();
2261 __c_node* __cn1 = __db->__find_c_and_lock(this);
2262 __c_node* __cn2 = __db->__find_c(&__c);
2263 for (__i_node** __p = __cn2->end_; __p != __cn2->beg_;)
2264 {
2265 --__p;
2266 iterator* __i = static_cast<iterator*>((*__p)->__i_);
2267 if (__i->__ptr_ != __c.__end_as_link())
2268 {
2269 __cn1->__add(*__p);
2270 (*__p)->__c_ = __cn1;
2271 if (--__cn2->end_ != __p)
2272 memmove(__p, __p+1, (__cn2->end_ - __p)*sizeof(__i_node*));
2273 }
2274 }
2275 __db->unlock();
2276#endif
2277 }
2278}
2279
2280template <class _Tp, class _Alloc>
2281inline
2282void
2283list<_Tp, _Alloc>::sort()
2284{
2285 sort(__less<value_type>());
2286}
2287
2288template <class _Tp, class _Alloc>
2289template <class _Comp>
2290inline
2291void
2292list<_Tp, _Alloc>::sort(_Comp __comp)
2293{
2294 __sort(begin(), end(), base::__sz(), __comp);
2295}
2296
2297template <class _Tp, class _Alloc>
2298template <class _Comp>
2299typename list<_Tp, _Alloc>::iterator
2300list<_Tp, _Alloc>::__sort(iterator __f1, iterator __e2, size_type __n, _Comp& __comp)
2301{
2302 switch (__n)
2303 {
2304 case 0:
2305 case 1:
2306 return __f1;
2307 case 2:
2308 if (__comp(*--__e2, *__f1))
2309 {
2310 __link_pointer __f = __e2.__ptr_;
2311 base::__unlink_nodes(__f, __f);
2312 __link_nodes(__f1.__ptr_, __f, __f);
2313 return __e2;
2314 }
2315 return __f1;
2316 }
2317 size_type __n2 = __n / 2;
2318 iterator __e1 = _VSTD::next(__f1, __n2);
2319 iterator __r = __f1 = __sort(__f1, __e1, __n2, __comp);
2320 iterator __f2 = __e1 = __sort(__e1, __e2, __n - __n2, __comp);
2321 if (__comp(*__f2, *__f1))
2322 {
2323 iterator __m2 = _VSTD::next(__f2);
2324 for (; __m2 != __e2 && __comp(*__m2, *__f1); ++__m2)
2325 ;
2326 __link_pointer __f = __f2.__ptr_;
2327 __link_pointer __l = __m2.__ptr_->__prev_;
2328 __r = __f2;
2329 __e1 = __f2 = __m2;
2330 base::__unlink_nodes(__f, __l);
2331 __m2 = _VSTD::next(__f1);
2332 __link_nodes(__f1.__ptr_, __f, __l);
2333 __f1 = __m2;
2334 }
2335 else
2336 ++__f1;
2337 while (__f1 != __e1 && __f2 != __e2)
2338 {
2339 if (__comp(*__f2, *__f1))
2340 {
2341 iterator __m2 = _VSTD::next(__f2);
2342 for (; __m2 != __e2 && __comp(*__m2, *__f1); ++__m2)
2343 ;
2344 __link_pointer __f = __f2.__ptr_;
2345 __link_pointer __l = __m2.__ptr_->__prev_;
2346 if (__e1 == __f2)
2347 __e1 = __m2;
2348 __f2 = __m2;
2349 base::__unlink_nodes(__f, __l);
2350 __m2 = _VSTD::next(__f1);
2351 __link_nodes(__f1.__ptr_, __f, __l);
2352 __f1 = __m2;
2353 }
2354 else
2355 ++__f1;
2356 }
2357 return __r;
2358}
2359
2360template <class _Tp, class _Alloc>
2361void
2362list<_Tp, _Alloc>::reverse() _NOEXCEPT
2363{
2364 if (base::__sz() > 1)
2365 {
2366 iterator __e = end();
2367 for (iterator __i = begin(); __i.__ptr_ != __e.__ptr_;)
2368 {
2369 _VSTD::swap(__i.__ptr_->__prev_, __i.__ptr_->__next_);
2370 __i.__ptr_ = __i.__ptr_->__prev_;
2371 }
2372 _VSTD::swap(__e.__ptr_->__prev_, __e.__ptr_->__next_);
2373 }
2374}
2375
2376template <class _Tp, class _Alloc>
2377bool
2378list<_Tp, _Alloc>::__invariants() const
2379{
2380 return size() == _VSTD::distance(begin(), end());
2381}
2382
2383#if _LIBCPP_DEBUG_LEVEL >= 2
2384
2385template <class _Tp, class _Alloc>
2386bool
2387list<_Tp, _Alloc>::__dereferenceable(const const_iterator* __i) const
2388{
2389 return __i->__ptr_ != this->__end_as_link();
2390}
2391
2392template <class _Tp, class _Alloc>
2393bool
2394list<_Tp, _Alloc>::__decrementable(const const_iterator* __i) const
2395{
2396 return !empty() && __i->__ptr_ != base::__end_.__next_;
2397}
2398
2399template <class _Tp, class _Alloc>
2400bool
2401list<_Tp, _Alloc>::__addable(const const_iterator*, ptrdiff_t) const
2402{
2403 return false;
2404}
2405
2406template <class _Tp, class _Alloc>
2407bool
2408list<_Tp, _Alloc>::__subscriptable(const const_iterator*, ptrdiff_t) const
2409{
2410 return false;
2411}
2412
2413#endif // _LIBCPP_DEBUG_LEVEL >= 2
2414
2415template <class _Tp, class _Alloc>
2416inline _LIBCPP_INLINE_VISIBILITY
2417bool
2418operator==(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2419{
2420 return __x.size() == __y.size() && _VSTD::equal(__x.begin(), __x.end(), __y.begin());
2421}
2422
2423template <class _Tp, class _Alloc>
2424inline _LIBCPP_INLINE_VISIBILITY
2425bool
2426operator< (const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2427{
2428 return _VSTD::lexicographical_compare(__x.begin(), __x.end(), __y.begin(), __y.end());
2429}
2430
2431template <class _Tp, class _Alloc>
2432inline _LIBCPP_INLINE_VISIBILITY
2433bool
2434operator!=(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2435{
2436 return !(__x == __y);
2437}
2438
2439template <class _Tp, class _Alloc>
2440inline _LIBCPP_INLINE_VISIBILITY
2441bool
2442operator> (const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2443{
2444 return __y < __x;
2445}
2446
2447template <class _Tp, class _Alloc>
2448inline _LIBCPP_INLINE_VISIBILITY
2449bool
2450operator>=(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2451{
2452 return !(__x < __y);
2453}
2454
2455template <class _Tp, class _Alloc>
2456inline _LIBCPP_INLINE_VISIBILITY
2457bool
2458operator<=(const list<_Tp, _Alloc>& __x, const list<_Tp, _Alloc>& __y)
2459{
2460 return !(__y < __x);
2461}
2462
2463template <class _Tp, class _Alloc>
2464inline _LIBCPP_INLINE_VISIBILITY
2465void
2466swap(list<_Tp, _Alloc>& __x, list<_Tp, _Alloc>& __y)
2467 _NOEXCEPT_(_NOEXCEPT_(__x.swap(__y)))
2468{
2469 __x.swap(__y);
2470}
2471
2472#if _LIBCPP_STD_VER > 17
2473template <class _Tp, class _Allocator, class _Predicate>
2474inline _LIBCPP_INLINE_VISIBILITY
2475void erase_if(list<_Tp, _Allocator>& __c, _Predicate __pred)
2476{ __c.remove_if(__pred); }
2477
2478template <class _Tp, class _Allocator, class _Up>
2479inline _LIBCPP_INLINE_VISIBILITY
2480void erase(list<_Tp, _Allocator>& __c, const _Up& __v)
2481{ _VSTD::erase_if(__c, [&](auto& __elem) { return __elem == __v; }); }
2482#endif
2483
2484_LIBCPP_END_NAMESPACE_STD
2485
2486_LIBCPP_POP_MACROS
2487
2488#endif // _LIBCPP_LIST
2489