1// -*- C++ -*-
2//===-------------------------- memory ------------------------------------===//
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_MEMORY
11#define _LIBCPP_MEMORY
12
13/*
14 memory synopsis
15
16namespace std
17{
18
19struct allocator_arg_t { };
20inline constexpr allocator_arg_t allocator_arg = allocator_arg_t();
21
22template <class T, class Alloc> struct uses_allocator;
23
24template <class Ptr>
25struct pointer_traits
26{
27 typedef Ptr pointer;
28 typedef <details> element_type;
29 typedef <details> difference_type;
30
31 template <class U> using rebind = <details>;
32
33 static pointer pointer_to(<details>);
34};
35
36template <class T>
37struct pointer_traits<T*>
38{
39 typedef T* pointer;
40 typedef T element_type;
41 typedef ptrdiff_t difference_type;
42
43 template <class U> using rebind = U*;
44
45 static pointer pointer_to(<details>) noexcept; // constexpr in C++20
46};
47
48template <class T> constexpr T* to_address(T* p) noexcept; // C++20
49template <class Ptr> auto to_address(const Ptr& p) noexcept; // C++20
50
51template <class Alloc>
52struct allocator_traits
53{
54 typedef Alloc allocator_type;
55 typedef typename allocator_type::value_type
56 value_type;
57
58 typedef Alloc::pointer | value_type* pointer;
59 typedef Alloc::const_pointer
60 | pointer_traits<pointer>::rebind<const value_type>
61 const_pointer;
62 typedef Alloc::void_pointer
63 | pointer_traits<pointer>::rebind<void>
64 void_pointer;
65 typedef Alloc::const_void_pointer
66 | pointer_traits<pointer>::rebind<const void>
67 const_void_pointer;
68 typedef Alloc::difference_type
69 | pointer_traits<pointer>::difference_type
70 difference_type;
71 typedef Alloc::size_type
72 | make_unsigned<difference_type>::type
73 size_type;
74 typedef Alloc::propagate_on_container_copy_assignment
75 | false_type propagate_on_container_copy_assignment;
76 typedef Alloc::propagate_on_container_move_assignment
77 | false_type propagate_on_container_move_assignment;
78 typedef Alloc::propagate_on_container_swap
79 | false_type propagate_on_container_swap;
80 typedef Alloc::is_always_equal
81 | is_empty is_always_equal;
82
83 template <class T> using rebind_alloc = Alloc::rebind<U>::other | Alloc<T, Args...>;
84 template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>;
85
86 static pointer allocate(allocator_type& a, size_type n); // [[nodiscard]] in C++20
87 static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); // [[nodiscard]] in C++20
88
89 static void deallocate(allocator_type& a, pointer p, size_type n) noexcept;
90
91 template <class T, class... Args>
92 static void construct(allocator_type& a, T* p, Args&&... args);
93
94 template <class T>
95 static void destroy(allocator_type& a, T* p);
96
97 static size_type max_size(const allocator_type& a); // noexcept in C++14
98
99 static allocator_type
100 select_on_container_copy_construction(const allocator_type& a);
101};
102
103template <>
104class allocator<void>
105{
106public:
107 typedef void* pointer;
108 typedef const void* const_pointer;
109 typedef void value_type;
110
111 template <class _Up> struct rebind {typedef allocator<_Up> other;};
112};
113
114template <class T>
115class allocator
116{
117public:
118 typedef size_t size_type;
119 typedef ptrdiff_t difference_type;
120 typedef T* pointer;
121 typedef const T* const_pointer;
122 typedef typename add_lvalue_reference<T>::type reference;
123 typedef typename add_lvalue_reference<const T>::type const_reference;
124 typedef T value_type;
125
126 template <class U> struct rebind {typedef allocator<U> other;};
127
128 constexpr allocator() noexcept; // constexpr in C++20
129 constexpr allocator(const allocator&) noexcept; // constexpr in C++20
130 template <class U>
131 constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20
132 ~allocator();
133 pointer address(reference x) const noexcept;
134 const_pointer address(const_reference x) const noexcept;
135 pointer allocate(size_type, allocator<void>::const_pointer hint = 0);
136 void deallocate(pointer p, size_type n) noexcept;
137 size_type max_size() const noexcept;
138 template<class U, class... Args>
139 void construct(U* p, Args&&... args);
140 template <class U>
141 void destroy(U* p);
142};
143
144template <class T, class U>
145bool operator==(const allocator<T>&, const allocator<U>&) noexcept;
146
147template <class T, class U>
148bool operator!=(const allocator<T>&, const allocator<U>&) noexcept;
149
150template <class OutputIterator, class T>
151class raw_storage_iterator
152 : public iterator<output_iterator_tag,
153 T, // purposefully not C++03
154 ptrdiff_t, // purposefully not C++03
155 T*, // purposefully not C++03
156 raw_storage_iterator&> // purposefully not C++03
157{
158public:
159 explicit raw_storage_iterator(OutputIterator x);
160 raw_storage_iterator& operator*();
161 raw_storage_iterator& operator=(const T& element);
162 raw_storage_iterator& operator++();
163 raw_storage_iterator operator++(int);
164};
165
166template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept;
167template <class T> void return_temporary_buffer(T* p) noexcept;
168
169template <class T> T* addressof(T& r) noexcept;
170template <class T> T* addressof(const T&& r) noexcept = delete;
171
172template <class InputIterator, class ForwardIterator>
173ForwardIterator
174uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result);
175
176template <class InputIterator, class Size, class ForwardIterator>
177ForwardIterator
178uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result);
179
180template <class ForwardIterator, class T>
181void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x);
182
183template <class ForwardIterator, class Size, class T>
184ForwardIterator
185uninitialized_fill_n(ForwardIterator first, Size n, const T& x);
186
187template <class T>
188void destroy_at(T* location);
189
190template <class ForwardIterator>
191 void destroy(ForwardIterator first, ForwardIterator last);
192
193template <class ForwardIterator, class Size>
194 ForwardIterator destroy_n(ForwardIterator first, Size n);
195
196template <class InputIterator, class ForwardIterator>
197 ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result);
198
199template <class InputIterator, class Size, class ForwardIterator>
200 pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result);
201
202template <class ForwardIterator>
203 void uninitialized_value_construct(ForwardIterator first, ForwardIterator last);
204
205template <class ForwardIterator, class Size>
206 ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n);
207
208template <class ForwardIterator>
209 void uninitialized_default_construct(ForwardIterator first, ForwardIterator last);
210
211template <class ForwardIterator, class Size>
212 ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n);
213
214template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17
215
216template<class X>
217class auto_ptr // deprecated in C++11, removed in C++17
218{
219public:
220 typedef X element_type;
221
222 explicit auto_ptr(X* p =0) throw();
223 auto_ptr(auto_ptr&) throw();
224 template<class Y> auto_ptr(auto_ptr<Y>&) throw();
225 auto_ptr& operator=(auto_ptr&) throw();
226 template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw();
227 auto_ptr& operator=(auto_ptr_ref<X> r) throw();
228 ~auto_ptr() throw();
229
230 typename add_lvalue_reference<X>::type operator*() const throw();
231 X* operator->() const throw();
232 X* get() const throw();
233 X* release() throw();
234 void reset(X* p =0) throw();
235
236 auto_ptr(auto_ptr_ref<X>) throw();
237 template<class Y> operator auto_ptr_ref<Y>() throw();
238 template<class Y> operator auto_ptr<Y>() throw();
239};
240
241template <class T>
242struct default_delete
243{
244 constexpr default_delete() noexcept = default;
245 template <class U> default_delete(const default_delete<U>&) noexcept;
246
247 void operator()(T*) const noexcept;
248};
249
250template <class T>
251struct default_delete<T[]>
252{
253 constexpr default_delete() noexcept = default;
254 void operator()(T*) const noexcept;
255 template <class U> void operator()(U*) const = delete;
256};
257
258template <class T, class D = default_delete<T>>
259class unique_ptr
260{
261public:
262 typedef see below pointer;
263 typedef T element_type;
264 typedef D deleter_type;
265
266 // constructors
267 constexpr unique_ptr() noexcept;
268 explicit unique_ptr(pointer p) noexcept;
269 unique_ptr(pointer p, see below d1) noexcept;
270 unique_ptr(pointer p, see below d2) noexcept;
271 unique_ptr(unique_ptr&& u) noexcept;
272 unique_ptr(nullptr_t) noexcept : unique_ptr() { }
273 template <class U, class E>
274 unique_ptr(unique_ptr<U, E>&& u) noexcept;
275 template <class U>
276 unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17
277
278 // destructor
279 ~unique_ptr();
280
281 // assignment
282 unique_ptr& operator=(unique_ptr&& u) noexcept;
283 template <class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept;
284 unique_ptr& operator=(nullptr_t) noexcept;
285
286 // observers
287 typename add_lvalue_reference<T>::type operator*() const;
288 pointer operator->() const noexcept;
289 pointer get() const noexcept;
290 deleter_type& get_deleter() noexcept;
291 const deleter_type& get_deleter() const noexcept;
292 explicit operator bool() const noexcept;
293
294 // modifiers
295 pointer release() noexcept;
296 void reset(pointer p = pointer()) noexcept;
297 void swap(unique_ptr& u) noexcept;
298};
299
300template <class T, class D>
301class unique_ptr<T[], D>
302{
303public:
304 typedef implementation-defined pointer;
305 typedef T element_type;
306 typedef D deleter_type;
307
308 // constructors
309 constexpr unique_ptr() noexcept;
310 explicit unique_ptr(pointer p) noexcept;
311 unique_ptr(pointer p, see below d) noexcept;
312 unique_ptr(pointer p, see below d) noexcept;
313 unique_ptr(unique_ptr&& u) noexcept;
314 unique_ptr(nullptr_t) noexcept : unique_ptr() { }
315
316 // destructor
317 ~unique_ptr();
318
319 // assignment
320 unique_ptr& operator=(unique_ptr&& u) noexcept;
321 unique_ptr& operator=(nullptr_t) noexcept;
322
323 // observers
324 T& operator[](size_t i) const;
325 pointer get() const noexcept;
326 deleter_type& get_deleter() noexcept;
327 const deleter_type& get_deleter() const noexcept;
328 explicit operator bool() const noexcept;
329
330 // modifiers
331 pointer release() noexcept;
332 void reset(pointer p = pointer()) noexcept;
333 void reset(nullptr_t) noexcept;
334 template <class U> void reset(U) = delete;
335 void swap(unique_ptr& u) noexcept;
336};
337
338template <class T, class D>
339 void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept;
340
341template <class T1, class D1, class T2, class D2>
342 bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
343template <class T1, class D1, class T2, class D2>
344 bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
345template <class T1, class D1, class T2, class D2>
346 bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
347template <class T1, class D1, class T2, class D2>
348 bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
349template <class T1, class D1, class T2, class D2>
350 bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
351template <class T1, class D1, class T2, class D2>
352 bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y);
353
354template <class T, class D>
355 bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept;
356template <class T, class D>
357 bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept;
358template <class T, class D>
359 bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept;
360template <class T, class D>
361 bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept;
362
363template <class T, class D>
364 bool operator<(const unique_ptr<T, D>& x, nullptr_t);
365template <class T, class D>
366 bool operator<(nullptr_t, const unique_ptr<T, D>& y);
367template <class T, class D>
368 bool operator<=(const unique_ptr<T, D>& x, nullptr_t);
369template <class T, class D>
370 bool operator<=(nullptr_t, const unique_ptr<T, D>& y);
371template <class T, class D>
372 bool operator>(const unique_ptr<T, D>& x, nullptr_t);
373template <class T, class D>
374 bool operator>(nullptr_t, const unique_ptr<T, D>& y);
375template <class T, class D>
376 bool operator>=(const unique_ptr<T, D>& x, nullptr_t);
377template <class T, class D>
378 bool operator>=(nullptr_t, const unique_ptr<T, D>& y);
379
380class bad_weak_ptr
381 : public std::exception
382{
383 bad_weak_ptr() noexcept;
384};
385
386template<class T, class... Args> unique_ptr<T> make_unique(Args&&... args); // C++14
387template<class T> unique_ptr<T> make_unique(size_t n); // C++14
388template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N]
389
390template<class E, class T, class Y, class D>
391 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, unique_ptr<Y, D> const& p);
392
393template<class T>
394class shared_ptr
395{
396public:
397 typedef T element_type;
398 typedef weak_ptr<T> weak_type; // C++17
399
400 // constructors:
401 constexpr shared_ptr() noexcept;
402 template<class Y> explicit shared_ptr(Y* p);
403 template<class Y, class D> shared_ptr(Y* p, D d);
404 template<class Y, class D, class A> shared_ptr(Y* p, D d, A a);
405 template <class D> shared_ptr(nullptr_t p, D d);
406 template <class D, class A> shared_ptr(nullptr_t p, D d, A a);
407 template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept;
408 shared_ptr(const shared_ptr& r) noexcept;
409 template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept;
410 shared_ptr(shared_ptr&& r) noexcept;
411 template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept;
412 template<class Y> explicit shared_ptr(const weak_ptr<Y>& r);
413 template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17
414 template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r);
415 shared_ptr(nullptr_t) : shared_ptr() { }
416
417 // destructor:
418 ~shared_ptr();
419
420 // assignment:
421 shared_ptr& operator=(const shared_ptr& r) noexcept;
422 template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept;
423 shared_ptr& operator=(shared_ptr&& r) noexcept;
424 template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r);
425 template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17
426 template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r);
427
428 // modifiers:
429 void swap(shared_ptr& r) noexcept;
430 void reset() noexcept;
431 template<class Y> void reset(Y* p);
432 template<class Y, class D> void reset(Y* p, D d);
433 template<class Y, class D, class A> void reset(Y* p, D d, A a);
434
435 // observers:
436 T* get() const noexcept;
437 T& operator*() const noexcept;
438 T* operator->() const noexcept;
439 long use_count() const noexcept;
440 bool unique() const noexcept;
441 explicit operator bool() const noexcept;
442 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept;
443 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept;
444};
445
446// shared_ptr comparisons:
447template<class T, class U>
448 bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept;
449template<class T, class U>
450 bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept;
451template<class T, class U>
452 bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept;
453template<class T, class U>
454 bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept;
455template<class T, class U>
456 bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept;
457template<class T, class U>
458 bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept;
459
460template <class T>
461 bool operator==(const shared_ptr<T>& x, nullptr_t) noexcept;
462template <class T>
463 bool operator==(nullptr_t, const shared_ptr<T>& y) noexcept;
464template <class T>
465 bool operator!=(const shared_ptr<T>& x, nullptr_t) noexcept;
466template <class T>
467 bool operator!=(nullptr_t, const shared_ptr<T>& y) noexcept;
468template <class T>
469 bool operator<(const shared_ptr<T>& x, nullptr_t) noexcept;
470template <class T>
471bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept;
472template <class T>
473 bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept;
474template <class T>
475 bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept;
476template <class T>
477 bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept;
478template <class T>
479 bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept;
480template <class T>
481 bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept;
482template <class T>
483 bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept;
484
485// shared_ptr specialized algorithms:
486template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept;
487
488// shared_ptr casts:
489template<class T, class U>
490 shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept;
491template<class T, class U>
492 shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept;
493template<class T, class U>
494 shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept;
495
496// shared_ptr I/O:
497template<class E, class T, class Y>
498 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p);
499
500// shared_ptr get_deleter:
501template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept;
502
503template<class T, class... Args>
504 shared_ptr<T> make_shared(Args&&... args);
505template<class T, class A, class... Args>
506 shared_ptr<T> allocate_shared(const A& a, Args&&... args);
507
508template<class T>
509class weak_ptr
510{
511public:
512 typedef T element_type;
513
514 // constructors
515 constexpr weak_ptr() noexcept;
516 template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept;
517 weak_ptr(weak_ptr const& r) noexcept;
518 template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept;
519 weak_ptr(weak_ptr&& r) noexcept; // C++14
520 template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14
521
522 // destructor
523 ~weak_ptr();
524
525 // assignment
526 weak_ptr& operator=(weak_ptr const& r) noexcept;
527 template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept;
528 template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept;
529 weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14
530 template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14
531
532 // modifiers
533 void swap(weak_ptr& r) noexcept;
534 void reset() noexcept;
535
536 // observers
537 long use_count() const noexcept;
538 bool expired() const noexcept;
539 shared_ptr<T> lock() const noexcept;
540 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept;
541 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept;
542};
543
544// weak_ptr specialized algorithms:
545template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept;
546
547// class owner_less:
548template<class T> struct owner_less;
549
550template<class T>
551struct owner_less<shared_ptr<T>>
552 : binary_function<shared_ptr<T>, shared_ptr<T>, bool>
553{
554 typedef bool result_type;
555 bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept;
556 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept;
557 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept;
558};
559
560template<class T>
561struct owner_less<weak_ptr<T>>
562 : binary_function<weak_ptr<T>, weak_ptr<T>, bool>
563{
564 typedef bool result_type;
565 bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept;
566 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept;
567 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept;
568};
569
570template <> // Added in C++14
571struct owner_less<void>
572{
573 template <class _Tp, class _Up>
574 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept;
575 template <class _Tp, class _Up>
576 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept;
577 template <class _Tp, class _Up>
578 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept;
579 template <class _Tp, class _Up>
580 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept;
581
582 typedef void is_transparent;
583};
584
585template<class T>
586class enable_shared_from_this
587{
588protected:
589 constexpr enable_shared_from_this() noexcept;
590 enable_shared_from_this(enable_shared_from_this const&) noexcept;
591 enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept;
592 ~enable_shared_from_this();
593public:
594 shared_ptr<T> shared_from_this();
595 shared_ptr<T const> shared_from_this() const;
596};
597
598template<class T>
599 bool atomic_is_lock_free(const shared_ptr<T>* p);
600template<class T>
601 shared_ptr<T> atomic_load(const shared_ptr<T>* p);
602template<class T>
603 shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo);
604template<class T>
605 void atomic_store(shared_ptr<T>* p, shared_ptr<T> r);
606template<class T>
607 void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo);
608template<class T>
609 shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r);
610template<class T>
611 shared_ptr<T>
612 atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo);
613template<class T>
614 bool
615 atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w);
616template<class T>
617 bool
618 atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w);
619template<class T>
620 bool
621 atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v,
622 shared_ptr<T> w, memory_order success,
623 memory_order failure);
624template<class T>
625 bool
626 atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v,
627 shared_ptr<T> w, memory_order success,
628 memory_order failure);
629// Hash support
630template <class T> struct hash;
631template <class T, class D> struct hash<unique_ptr<T, D> >;
632template <class T> struct hash<shared_ptr<T> >;
633
634template <class T, class Alloc>
635 inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value;
636
637// Pointer safety
638enum class pointer_safety { relaxed, preferred, strict };
639void declare_reachable(void *p);
640template <class T> T *undeclare_reachable(T *p);
641void declare_no_pointers(char *p, size_t n);
642void undeclare_no_pointers(char *p, size_t n);
643pointer_safety get_pointer_safety() noexcept;
644
645void* align(size_t alignment, size_t size, void*& ptr, size_t& space);
646
647} // std
648
649*/
650
651#include <__config>
652#include <type_traits>
653#include <typeinfo>
654#include <cstddef>
655#include <cstdint>
656#include <new>
657#include <utility>
658#include <limits>
659#include <iterator>
660#include <__functional_base>
661#include <iosfwd>
662#include <tuple>
663#include <stdexcept>
664#include <cstring>
665#include <cassert>
666#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER)
667# include <atomic>
668#endif
669#include <version>
670
671#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
672#pragma GCC system_header
673#endif
674
675_LIBCPP_PUSH_MACROS
676#include <__undef_macros>
677
678
679_LIBCPP_BEGIN_NAMESPACE_STD
680
681template <class _ValueType>
682inline _LIBCPP_INLINE_VISIBILITY
683_ValueType __libcpp_relaxed_load(_ValueType const* __value) {
684#if !defined(_LIBCPP_HAS_NO_THREADS) && \
685 defined(__ATOMIC_RELAXED) && \
686 (__has_builtin(__atomic_load_n) || _GNUC_VER >= 407)
687 return __atomic_load_n(__value, __ATOMIC_RELAXED);
688#else
689 return *__value;
690#endif
691}
692
693template <class _ValueType>
694inline _LIBCPP_INLINE_VISIBILITY
695_ValueType __libcpp_acquire_load(_ValueType const* __value) {
696#if !defined(_LIBCPP_HAS_NO_THREADS) && \
697 defined(__ATOMIC_ACQUIRE) && \
698 (__has_builtin(__atomic_load_n) || _GNUC_VER >= 407)
699 return __atomic_load_n(__value, __ATOMIC_ACQUIRE);
700#else
701 return *__value;
702#endif
703}
704
705// addressof moved to <type_traits>
706
707template <class _Tp> class allocator;
708
709template <>
710class _LIBCPP_TEMPLATE_VIS allocator<void>
711{
712public:
713 typedef void* pointer;
714 typedef const void* const_pointer;
715 typedef void value_type;
716
717 template <class _Up> struct rebind {typedef allocator<_Up> other;};
718};
719
720template <>
721class _LIBCPP_TEMPLATE_VIS allocator<const void>
722{
723public:
724 typedef const void* pointer;
725 typedef const void* const_pointer;
726 typedef const void value_type;
727
728 template <class _Up> struct rebind {typedef allocator<_Up> other;};
729};
730
731// pointer_traits
732
733template <class _Tp, class = void>
734struct __has_element_type : false_type {};
735
736template <class _Tp>
737struct __has_element_type<_Tp,
738 typename __void_t<typename _Tp::element_type>::type> : true_type {};
739
740template <class _Ptr, bool = __has_element_type<_Ptr>::value>
741struct __pointer_traits_element_type;
742
743template <class _Ptr>
744struct __pointer_traits_element_type<_Ptr, true>
745{
746 typedef typename _Ptr::element_type type;
747};
748
749#ifndef _LIBCPP_HAS_NO_VARIADICS
750
751template <template <class, class...> class _Sp, class _Tp, class ..._Args>
752struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, true>
753{
754 typedef typename _Sp<_Tp, _Args...>::element_type type;
755};
756
757template <template <class, class...> class _Sp, class _Tp, class ..._Args>
758struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, false>
759{
760 typedef _Tp type;
761};
762
763#else // _LIBCPP_HAS_NO_VARIADICS
764
765template <template <class> class _Sp, class _Tp>
766struct __pointer_traits_element_type<_Sp<_Tp>, true>
767{
768 typedef typename _Sp<_Tp>::element_type type;
769};
770
771template <template <class> class _Sp, class _Tp>
772struct __pointer_traits_element_type<_Sp<_Tp>, false>
773{
774 typedef _Tp type;
775};
776
777template <template <class, class> class _Sp, class _Tp, class _A0>
778struct __pointer_traits_element_type<_Sp<_Tp, _A0>, true>
779{
780 typedef typename _Sp<_Tp, _A0>::element_type type;
781};
782
783template <template <class, class> class _Sp, class _Tp, class _A0>
784struct __pointer_traits_element_type<_Sp<_Tp, _A0>, false>
785{
786 typedef _Tp type;
787};
788
789template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1>
790struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, true>
791{
792 typedef typename _Sp<_Tp, _A0, _A1>::element_type type;
793};
794
795template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1>
796struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, false>
797{
798 typedef _Tp type;
799};
800
801template <template <class, class, class, class> class _Sp, class _Tp, class _A0,
802 class _A1, class _A2>
803struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, true>
804{
805 typedef typename _Sp<_Tp, _A0, _A1, _A2>::element_type type;
806};
807
808template <template <class, class, class, class> class _Sp, class _Tp, class _A0,
809 class _A1, class _A2>
810struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, false>
811{
812 typedef _Tp type;
813};
814
815#endif // _LIBCPP_HAS_NO_VARIADICS
816
817template <class _Tp, class = void>
818struct __has_difference_type : false_type {};
819
820template <class _Tp>
821struct __has_difference_type<_Tp,
822 typename __void_t<typename _Tp::difference_type>::type> : true_type {};
823
824template <class _Ptr, bool = __has_difference_type<_Ptr>::value>
825struct __pointer_traits_difference_type
826{
827 typedef ptrdiff_t type;
828};
829
830template <class _Ptr>
831struct __pointer_traits_difference_type<_Ptr, true>
832{
833 typedef typename _Ptr::difference_type type;
834};
835
836template <class _Tp, class _Up>
837struct __has_rebind
838{
839private:
840 struct __two {char __lx; char __lxx;};
841 template <class _Xp> static __two __test(...);
842 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>* = 0);
843public:
844 static const bool value = sizeof(__test<_Tp>(0)) == 1;
845};
846
847template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value>
848struct __pointer_traits_rebind
849{
850#ifndef _LIBCPP_CXX03_LANG
851 typedef typename _Tp::template rebind<_Up> type;
852#else
853 typedef typename _Tp::template rebind<_Up>::other type;
854#endif
855};
856
857#ifndef _LIBCPP_HAS_NO_VARIADICS
858
859template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up>
860struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, true>
861{
862#ifndef _LIBCPP_CXX03_LANG
863 typedef typename _Sp<_Tp, _Args...>::template rebind<_Up> type;
864#else
865 typedef typename _Sp<_Tp, _Args...>::template rebind<_Up>::other type;
866#endif
867};
868
869template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up>
870struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, false>
871{
872 typedef _Sp<_Up, _Args...> type;
873};
874
875#else // _LIBCPP_HAS_NO_VARIADICS
876
877template <template <class> class _Sp, class _Tp, class _Up>
878struct __pointer_traits_rebind<_Sp<_Tp>, _Up, true>
879{
880#ifndef _LIBCPP_CXX03_LANG
881 typedef typename _Sp<_Tp>::template rebind<_Up> type;
882#else
883 typedef typename _Sp<_Tp>::template rebind<_Up>::other type;
884#endif
885};
886
887template <template <class> class _Sp, class _Tp, class _Up>
888struct __pointer_traits_rebind<_Sp<_Tp>, _Up, false>
889{
890 typedef _Sp<_Up> type;
891};
892
893template <template <class, class> class _Sp, class _Tp, class _A0, class _Up>
894struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, true>
895{
896#ifndef _LIBCPP_CXX03_LANG
897 typedef typename _Sp<_Tp, _A0>::template rebind<_Up> type;
898#else
899 typedef typename _Sp<_Tp, _A0>::template rebind<_Up>::other type;
900#endif
901};
902
903template <template <class, class> class _Sp, class _Tp, class _A0, class _Up>
904struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, false>
905{
906 typedef _Sp<_Up, _A0> type;
907};
908
909template <template <class, class, class> class _Sp, class _Tp, class _A0,
910 class _A1, class _Up>
911struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, true>
912{
913#ifndef _LIBCPP_CXX03_LANG
914 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up> type;
915#else
916 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up>::other type;
917#endif
918};
919
920template <template <class, class, class> class _Sp, class _Tp, class _A0,
921 class _A1, class _Up>
922struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, false>
923{
924 typedef _Sp<_Up, _A0, _A1> type;
925};
926
927template <template <class, class, class, class> class _Sp, class _Tp, class _A0,
928 class _A1, class _A2, class _Up>
929struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, true>
930{
931#ifndef _LIBCPP_CXX03_LANG
932 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up> type;
933#else
934 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type;
935#endif
936};
937
938template <template <class, class, class, class> class _Sp, class _Tp, class _A0,
939 class _A1, class _A2, class _Up>
940struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, false>
941{
942 typedef _Sp<_Up, _A0, _A1, _A2> type;
943};
944
945#endif // _LIBCPP_HAS_NO_VARIADICS
946
947template <class _Ptr>
948struct _LIBCPP_TEMPLATE_VIS pointer_traits
949{
950 typedef _Ptr pointer;
951 typedef typename __pointer_traits_element_type<pointer>::type element_type;
952 typedef typename __pointer_traits_difference_type<pointer>::type difference_type;
953
954#ifndef _LIBCPP_CXX03_LANG
955 template <class _Up> using rebind = typename __pointer_traits_rebind<pointer, _Up>::type;
956#else
957 template <class _Up> struct rebind
958 {typedef typename __pointer_traits_rebind<pointer, _Up>::type other;};
959#endif // _LIBCPP_CXX03_LANG
960
961private:
962 struct __nat {};
963public:
964 _LIBCPP_INLINE_VISIBILITY
965 static pointer pointer_to(typename conditional<is_void<element_type>::value,
966 __nat, element_type>::type& __r)
967 {return pointer::pointer_to(__r);}
968};
969
970template <class _Tp>
971struct _LIBCPP_TEMPLATE_VIS pointer_traits<_Tp*>
972{
973 typedef _Tp* pointer;
974 typedef _Tp element_type;
975 typedef ptrdiff_t difference_type;
976
977#ifndef _LIBCPP_CXX03_LANG
978 template <class _Up> using rebind = _Up*;
979#else
980 template <class _Up> struct rebind {typedef _Up* other;};
981#endif
982
983private:
984 struct __nat {};
985public:
986 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
987 static pointer pointer_to(typename conditional<is_void<element_type>::value,
988 __nat, element_type>::type& __r) _NOEXCEPT
989 {return _VSTD::addressof(__r);}
990};
991
992template <class _From, class _To>
993struct __rebind_pointer {
994#ifndef _LIBCPP_CXX03_LANG
995 typedef typename pointer_traits<_From>::template rebind<_To> type;
996#else
997 typedef typename pointer_traits<_From>::template rebind<_To>::other type;
998#endif
999};
1000
1001// allocator_traits
1002
1003template <class _Tp, class = void>
1004struct __has_pointer_type : false_type {};
1005
1006template <class _Tp>
1007struct __has_pointer_type<_Tp,
1008 typename __void_t<typename _Tp::pointer>::type> : true_type {};
1009
1010namespace __pointer_type_imp
1011{
1012
1013template <class _Tp, class _Dp, bool = __has_pointer_type<_Dp>::value>
1014struct __pointer_type
1015{
1016 typedef typename _Dp::pointer type;
1017};
1018
1019template <class _Tp, class _Dp>
1020struct __pointer_type<_Tp, _Dp, false>
1021{
1022 typedef _Tp* type;
1023};
1024
1025} // __pointer_type_imp
1026
1027template <class _Tp, class _Dp>
1028struct __pointer_type
1029{
1030 typedef typename __pointer_type_imp::__pointer_type<_Tp, typename remove_reference<_Dp>::type>::type type;
1031};
1032
1033template <class _Tp, class = void>
1034struct __has_const_pointer : false_type {};
1035
1036template <class _Tp>
1037struct __has_const_pointer<_Tp,
1038 typename __void_t<typename _Tp::const_pointer>::type> : true_type {};
1039
1040template <class _Tp, class _Ptr, class _Alloc, bool = __has_const_pointer<_Alloc>::value>
1041struct __const_pointer
1042{
1043 typedef typename _Alloc::const_pointer type;
1044};
1045
1046template <class _Tp, class _Ptr, class _Alloc>
1047struct __const_pointer<_Tp, _Ptr, _Alloc, false>
1048{
1049#ifndef _LIBCPP_CXX03_LANG
1050 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp> type;
1051#else
1052 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp>::other type;
1053#endif
1054};
1055
1056template <class _Tp, class = void>
1057struct __has_void_pointer : false_type {};
1058
1059template <class _Tp>
1060struct __has_void_pointer<_Tp,
1061 typename __void_t<typename _Tp::void_pointer>::type> : true_type {};
1062
1063template <class _Ptr, class _Alloc, bool = __has_void_pointer<_Alloc>::value>
1064struct __void_pointer
1065{
1066 typedef typename _Alloc::void_pointer type;
1067};
1068
1069template <class _Ptr, class _Alloc>
1070struct __void_pointer<_Ptr, _Alloc, false>
1071{
1072#ifndef _LIBCPP_CXX03_LANG
1073 typedef typename pointer_traits<_Ptr>::template rebind<void> type;
1074#else
1075 typedef typename pointer_traits<_Ptr>::template rebind<void>::other type;
1076#endif
1077};
1078
1079template <class _Tp, class = void>
1080struct __has_const_void_pointer : false_type {};
1081
1082template <class _Tp>
1083struct __has_const_void_pointer<_Tp,
1084 typename __void_t<typename _Tp::const_void_pointer>::type> : true_type {};
1085
1086template <class _Ptr, class _Alloc, bool = __has_const_void_pointer<_Alloc>::value>
1087struct __const_void_pointer
1088{
1089 typedef typename _Alloc::const_void_pointer type;
1090};
1091
1092template <class _Ptr, class _Alloc>
1093struct __const_void_pointer<_Ptr, _Alloc, false>
1094{
1095#ifndef _LIBCPP_CXX03_LANG
1096 typedef typename pointer_traits<_Ptr>::template rebind<const void> type;
1097#else
1098 typedef typename pointer_traits<_Ptr>::template rebind<const void>::other type;
1099#endif
1100};
1101
1102template <class _Tp>
1103inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
1104_Tp*
1105__to_raw_pointer(_Tp* __p) _NOEXCEPT
1106{
1107 return __p;
1108}
1109
1110#if _LIBCPP_STD_VER <= 17
1111template <class _Pointer>
1112inline _LIBCPP_INLINE_VISIBILITY
1113typename pointer_traits<_Pointer>::element_type*
1114__to_raw_pointer(_Pointer __p) _NOEXCEPT
1115{
1116 return _VSTD::__to_raw_pointer(__p.operator->());
1117}
1118#else
1119template <class _Pointer>
1120inline _LIBCPP_INLINE_VISIBILITY
1121auto
1122__to_raw_pointer(const _Pointer& __p) _NOEXCEPT
1123-> decltype(pointer_traits<_Pointer>::to_address(__p))
1124{
1125 return pointer_traits<_Pointer>::to_address(__p);
1126}
1127
1128template <class _Pointer, class... _None>
1129inline _LIBCPP_INLINE_VISIBILITY
1130auto
1131__to_raw_pointer(const _Pointer& __p, _None...) _NOEXCEPT
1132{
1133 return _VSTD::__to_raw_pointer(__p.operator->());
1134}
1135
1136template <class _Tp>
1137inline _LIBCPP_INLINE_VISIBILITY constexpr
1138_Tp*
1139to_address(_Tp* __p) _NOEXCEPT
1140{
1141 static_assert(!is_function_v<_Tp>, "_Tp is a function type");
1142 return __p;
1143}
1144
1145template <class _Pointer>
1146inline _LIBCPP_INLINE_VISIBILITY
1147auto
1148to_address(const _Pointer& __p) _NOEXCEPT
1149{
1150 return _VSTD::__to_raw_pointer(__p);
1151}
1152#endif
1153
1154template <class _Tp, class = void>
1155struct __has_size_type : false_type {};
1156
1157template <class _Tp>
1158struct __has_size_type<_Tp,
1159 typename __void_t<typename _Tp::size_type>::type> : true_type {};
1160
1161template <class _Alloc, class _DiffType, bool = __has_size_type<_Alloc>::value>
1162struct __size_type
1163{
1164 typedef typename make_unsigned<_DiffType>::type type;
1165};
1166
1167template <class _Alloc, class _DiffType>
1168struct __size_type<_Alloc, _DiffType, true>
1169{
1170 typedef typename _Alloc::size_type type;
1171};
1172
1173template <class _Tp, class = void>
1174struct __has_propagate_on_container_copy_assignment : false_type {};
1175
1176template <class _Tp>
1177struct __has_propagate_on_container_copy_assignment<_Tp,
1178 typename __void_t<typename _Tp::propagate_on_container_copy_assignment>::type>
1179 : true_type {};
1180
1181template <class _Alloc, bool = __has_propagate_on_container_copy_assignment<_Alloc>::value>
1182struct __propagate_on_container_copy_assignment
1183{
1184 typedef false_type type;
1185};
1186
1187template <class _Alloc>
1188struct __propagate_on_container_copy_assignment<_Alloc, true>
1189{
1190 typedef typename _Alloc::propagate_on_container_copy_assignment type;
1191};
1192
1193template <class _Tp, class = void>
1194struct __has_propagate_on_container_move_assignment : false_type {};
1195
1196template <class _Tp>
1197struct __has_propagate_on_container_move_assignment<_Tp,
1198 typename __void_t<typename _Tp::propagate_on_container_move_assignment>::type>
1199 : true_type {};
1200
1201template <class _Alloc, bool = __has_propagate_on_container_move_assignment<_Alloc>::value>
1202struct __propagate_on_container_move_assignment
1203{
1204 typedef false_type type;
1205};
1206
1207template <class _Alloc>
1208struct __propagate_on_container_move_assignment<_Alloc, true>
1209{
1210 typedef typename _Alloc::propagate_on_container_move_assignment type;
1211};
1212
1213template <class _Tp, class = void>
1214struct __has_propagate_on_container_swap : false_type {};
1215
1216template <class _Tp>
1217struct __has_propagate_on_container_swap<_Tp,
1218 typename __void_t<typename _Tp::propagate_on_container_swap>::type>
1219 : true_type {};
1220
1221template <class _Alloc, bool = __has_propagate_on_container_swap<_Alloc>::value>
1222struct __propagate_on_container_swap
1223{
1224 typedef false_type type;
1225};
1226
1227template <class _Alloc>
1228struct __propagate_on_container_swap<_Alloc, true>
1229{
1230 typedef typename _Alloc::propagate_on_container_swap type;
1231};
1232
1233template <class _Tp, class = void>
1234struct __has_is_always_equal : false_type {};
1235
1236template <class _Tp>
1237struct __has_is_always_equal<_Tp,
1238 typename __void_t<typename _Tp::is_always_equal>::type>
1239 : true_type {};
1240
1241template <class _Alloc, bool = __has_is_always_equal<_Alloc>::value>
1242struct __is_always_equal
1243{
1244 typedef typename _VSTD::is_empty<_Alloc>::type type;
1245};
1246
1247template <class _Alloc>
1248struct __is_always_equal<_Alloc, true>
1249{
1250 typedef typename _Alloc::is_always_equal type;
1251};
1252
1253template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value>
1254struct __has_rebind_other
1255{
1256private:
1257 struct __two {char __lx; char __lxx;};
1258 template <class _Xp> static __two __test(...);
1259 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>::other* = 0);
1260public:
1261 static const bool value = sizeof(__test<_Tp>(0)) == 1;
1262};
1263
1264template <class _Tp, class _Up>
1265struct __has_rebind_other<_Tp, _Up, false>
1266{
1267 static const bool value = false;
1268};
1269
1270template <class _Tp, class _Up, bool = __has_rebind_other<_Tp, _Up>::value>
1271struct __allocator_traits_rebind
1272{
1273 typedef typename _Tp::template rebind<_Up>::other type;
1274};
1275
1276#ifndef _LIBCPP_HAS_NO_VARIADICS
1277
1278template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up>
1279struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, true>
1280{
1281 typedef typename _Alloc<_Tp, _Args...>::template rebind<_Up>::other type;
1282};
1283
1284template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up>
1285struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, false>
1286{
1287 typedef _Alloc<_Up, _Args...> type;
1288};
1289
1290#else // _LIBCPP_HAS_NO_VARIADICS
1291
1292template <template <class> class _Alloc, class _Tp, class _Up>
1293struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, true>
1294{
1295 typedef typename _Alloc<_Tp>::template rebind<_Up>::other type;
1296};
1297
1298template <template <class> class _Alloc, class _Tp, class _Up>
1299struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, false>
1300{
1301 typedef _Alloc<_Up> type;
1302};
1303
1304template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up>
1305struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, true>
1306{
1307 typedef typename _Alloc<_Tp, _A0>::template rebind<_Up>::other type;
1308};
1309
1310template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up>
1311struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, false>
1312{
1313 typedef _Alloc<_Up, _A0> type;
1314};
1315
1316template <template <class, class, class> class _Alloc, class _Tp, class _A0,
1317 class _A1, class _Up>
1318struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, true>
1319{
1320 typedef typename _Alloc<_Tp, _A0, _A1>::template rebind<_Up>::other type;
1321};
1322
1323template <template <class, class, class> class _Alloc, class _Tp, class _A0,
1324 class _A1, class _Up>
1325struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, false>
1326{
1327 typedef _Alloc<_Up, _A0, _A1> type;
1328};
1329
1330template <template <class, class, class, class> class _Alloc, class _Tp, class _A0,
1331 class _A1, class _A2, class _Up>
1332struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, true>
1333{
1334 typedef typename _Alloc<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type;
1335};
1336
1337template <template <class, class, class, class> class _Alloc, class _Tp, class _A0,
1338 class _A1, class _A2, class _Up>
1339struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, false>
1340{
1341 typedef _Alloc<_Up, _A0, _A1, _A2> type;
1342};
1343
1344#endif // _LIBCPP_HAS_NO_VARIADICS
1345
1346#ifndef _LIBCPP_CXX03_LANG
1347
1348template <class _Alloc, class _SizeType, class _ConstVoidPtr>
1349auto
1350__has_allocate_hint_test(_Alloc&& __a, _SizeType&& __sz, _ConstVoidPtr&& __p)
1351 -> decltype((void)__a.allocate(__sz, __p), true_type());
1352
1353template <class _Alloc, class _SizeType, class _ConstVoidPtr>
1354auto
1355__has_allocate_hint_test(const _Alloc& __a, _SizeType&& __sz, _ConstVoidPtr&& __p)
1356 -> false_type;
1357
1358template <class _Alloc, class _SizeType, class _ConstVoidPtr>
1359struct __has_allocate_hint
1360 : integral_constant<bool,
1361 is_same<
1362 decltype(_VSTD::__has_allocate_hint_test(declval<_Alloc>(),
1363 declval<_SizeType>(),
1364 declval<_ConstVoidPtr>())),
1365 true_type>::value>
1366{
1367};
1368
1369#else // _LIBCPP_CXX03_LANG
1370
1371template <class _Alloc, class _SizeType, class _ConstVoidPtr>
1372struct __has_allocate_hint
1373 : true_type
1374{
1375};
1376
1377#endif // _LIBCPP_CXX03_LANG
1378
1379#if !defined(_LIBCPP_CXX03_LANG)
1380
1381template <class _Alloc, class _Tp, class ..._Args>
1382decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Tp*>(),
1383 _VSTD::declval<_Args>()...),
1384 true_type())
1385__has_construct_test(_Alloc&& __a, _Tp* __p, _Args&& ...__args);
1386
1387template <class _Alloc, class _Pointer, class ..._Args>
1388false_type
1389__has_construct_test(const _Alloc& __a, _Pointer&& __p, _Args&& ...__args);
1390
1391template <class _Alloc, class _Pointer, class ..._Args>
1392struct __has_construct
1393 : integral_constant<bool,
1394 is_same<
1395 decltype(_VSTD::__has_construct_test(declval<_Alloc>(),
1396 declval<_Pointer>(),
1397 declval<_Args>()...)),
1398 true_type>::value>
1399{
1400};
1401
1402template <class _Alloc, class _Pointer>
1403auto
1404__has_destroy_test(_Alloc&& __a, _Pointer&& __p)
1405 -> decltype(__a.destroy(__p), true_type());
1406
1407template <class _Alloc, class _Pointer>
1408auto
1409__has_destroy_test(const _Alloc& __a, _Pointer&& __p)
1410 -> false_type;
1411
1412template <class _Alloc, class _Pointer>
1413struct __has_destroy
1414 : integral_constant<bool,
1415 is_same<
1416 decltype(_VSTD::__has_destroy_test(declval<_Alloc>(),
1417 declval<_Pointer>())),
1418 true_type>::value>
1419{
1420};
1421
1422template <class _Alloc>
1423auto
1424__has_max_size_test(_Alloc&& __a)
1425 -> decltype(__a.max_size(), true_type());
1426
1427template <class _Alloc>
1428auto
1429__has_max_size_test(const volatile _Alloc& __a)
1430 -> false_type;
1431
1432template <class _Alloc>
1433struct __has_max_size
1434 : integral_constant<bool,
1435 is_same<
1436 decltype(_VSTD::__has_max_size_test(declval<_Alloc&>())),
1437 true_type>::value>
1438{
1439};
1440
1441template <class _Alloc>
1442auto
1443__has_select_on_container_copy_construction_test(_Alloc&& __a)
1444 -> decltype(__a.select_on_container_copy_construction(), true_type());
1445
1446template <class _Alloc>
1447auto
1448__has_select_on_container_copy_construction_test(const volatile _Alloc& __a)
1449 -> false_type;
1450
1451template <class _Alloc>
1452struct __has_select_on_container_copy_construction
1453 : integral_constant<bool,
1454 is_same<
1455 decltype(_VSTD::__has_select_on_container_copy_construction_test(declval<_Alloc&>())),
1456 true_type>::value>
1457{
1458};
1459
1460#else // _LIBCPP_CXX03_LANG
1461
1462template <class _Alloc, class _Pointer, class _Tp, class = void>
1463struct __has_construct : std::false_type {};
1464
1465template <class _Alloc, class _Pointer, class _Tp>
1466struct __has_construct<_Alloc, _Pointer, _Tp, typename __void_t<
1467 decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Pointer>(), _VSTD::declval<_Tp>()))
1468>::type> : std::true_type {};
1469
1470template <class _Alloc, class _Pointer, class = void>
1471struct __has_destroy : false_type {};
1472
1473template <class _Alloc, class _Pointer>
1474struct __has_destroy<_Alloc, _Pointer, typename __void_t<
1475 decltype(_VSTD::declval<_Alloc>().destroy(_VSTD::declval<_Pointer>()))
1476>::type> : std::true_type {};
1477
1478template <class _Alloc>
1479struct __has_max_size
1480 : true_type
1481{
1482};
1483
1484template <class _Alloc>
1485struct __has_select_on_container_copy_construction
1486 : false_type
1487{
1488};
1489
1490#endif // _LIBCPP_CXX03_LANG
1491
1492template <class _Alloc, class _Ptr, bool = __has_difference_type<_Alloc>::value>
1493struct __alloc_traits_difference_type
1494{
1495 typedef typename pointer_traits<_Ptr>::difference_type type;
1496};
1497
1498template <class _Alloc, class _Ptr>
1499struct __alloc_traits_difference_type<_Alloc, _Ptr, true>
1500{
1501 typedef typename _Alloc::difference_type type;
1502};
1503
1504template <class _Tp>
1505struct __is_default_allocator : false_type {};
1506
1507template <class _Tp>
1508struct __is_default_allocator<_VSTD::allocator<_Tp> > : true_type {};
1509
1510template <class _Alloc>
1511struct _LIBCPP_TEMPLATE_VIS allocator_traits
1512{
1513 typedef _Alloc allocator_type;
1514 typedef typename allocator_type::value_type value_type;
1515
1516 typedef typename __pointer_type<value_type, allocator_type>::type pointer;
1517 typedef typename __const_pointer<value_type, pointer, allocator_type>::type const_pointer;
1518 typedef typename __void_pointer<pointer, allocator_type>::type void_pointer;
1519 typedef typename __const_void_pointer<pointer, allocator_type>::type const_void_pointer;
1520
1521 typedef typename __alloc_traits_difference_type<allocator_type, pointer>::type difference_type;
1522 typedef typename __size_type<allocator_type, difference_type>::type size_type;
1523
1524 typedef typename __propagate_on_container_copy_assignment<allocator_type>::type
1525 propagate_on_container_copy_assignment;
1526 typedef typename __propagate_on_container_move_assignment<allocator_type>::type
1527 propagate_on_container_move_assignment;
1528 typedef typename __propagate_on_container_swap<allocator_type>::type
1529 propagate_on_container_swap;
1530 typedef typename __is_always_equal<allocator_type>::type
1531 is_always_equal;
1532
1533#ifndef _LIBCPP_CXX03_LANG
1534 template <class _Tp> using rebind_alloc =
1535 typename __allocator_traits_rebind<allocator_type, _Tp>::type;
1536 template <class _Tp> using rebind_traits = allocator_traits<rebind_alloc<_Tp>>;
1537#else // _LIBCPP_CXX03_LANG
1538 template <class _Tp> struct rebind_alloc
1539 {typedef typename __allocator_traits_rebind<allocator_type, _Tp>::type other;};
1540 template <class _Tp> struct rebind_traits
1541 {typedef allocator_traits<typename rebind_alloc<_Tp>::other> other;};
1542#endif // _LIBCPP_CXX03_LANG
1543
1544 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
1545 static pointer allocate(allocator_type& __a, size_type __n)
1546 {return __a.allocate(__n);}
1547 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
1548 static pointer allocate(allocator_type& __a, size_type __n, const_void_pointer __hint)
1549 {return __allocate(__a, __n, __hint,
1550 __has_allocate_hint<allocator_type, size_type, const_void_pointer>());}
1551
1552 _LIBCPP_INLINE_VISIBILITY
1553 static void deallocate(allocator_type& __a, pointer __p, size_type __n) _NOEXCEPT
1554 {__a.deallocate(__p, __n);}
1555
1556#ifndef _LIBCPP_HAS_NO_VARIADICS
1557 template <class _Tp, class... _Args>
1558 _LIBCPP_INLINE_VISIBILITY
1559 static void construct(allocator_type& __a, _Tp* __p, _Args&&... __args)
1560 {__construct(__has_construct<allocator_type, _Tp*, _Args...>(),
1561 __a, __p, _VSTD::forward<_Args>(__args)...);}
1562#else // _LIBCPP_HAS_NO_VARIADICS
1563 template <class _Tp>
1564 _LIBCPP_INLINE_VISIBILITY
1565 static void construct(allocator_type&, _Tp* __p)
1566 {
1567 ::new ((void*)__p) _Tp();
1568 }
1569 template <class _Tp, class _A0>
1570 _LIBCPP_INLINE_VISIBILITY
1571 static void construct(allocator_type& __a, _Tp* __p, const _A0& __a0)
1572 {
1573 __construct(__has_construct<allocator_type, _Tp*, const _A0&>(),
1574 __a, __p, __a0);
1575 }
1576 template <class _Tp, class _A0, class _A1>
1577 _LIBCPP_INLINE_VISIBILITY
1578 static void construct(allocator_type&, _Tp* __p, const _A0& __a0,
1579 const _A1& __a1)
1580 {
1581 ::new ((void*)__p) _Tp(__a0, __a1);
1582 }
1583 template <class _Tp, class _A0, class _A1, class _A2>
1584 _LIBCPP_INLINE_VISIBILITY
1585 static void construct(allocator_type&, _Tp* __p, const _A0& __a0,
1586 const _A1& __a1, const _A2& __a2)
1587 {
1588 ::new ((void*)__p) _Tp(__a0, __a1, __a2);
1589 }
1590#endif // _LIBCPP_HAS_NO_VARIADICS
1591
1592 template <class _Tp>
1593 _LIBCPP_INLINE_VISIBILITY
1594 static void destroy(allocator_type& __a, _Tp* __p)
1595 {__destroy(__has_destroy<allocator_type, _Tp*>(), __a, __p);}
1596
1597 _LIBCPP_INLINE_VISIBILITY
1598 static size_type max_size(const allocator_type& __a) _NOEXCEPT
1599 {return __max_size(__has_max_size<const allocator_type>(), __a);}
1600
1601 _LIBCPP_INLINE_VISIBILITY
1602 static allocator_type
1603 select_on_container_copy_construction(const allocator_type& __a)
1604 {return __select_on_container_copy_construction(
1605 __has_select_on_container_copy_construction<const allocator_type>(),
1606 __a);}
1607
1608 template <class _Ptr>
1609 _LIBCPP_INLINE_VISIBILITY
1610 static
1611 void
1612 __construct_forward(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2)
1613 {
1614 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2)
1615 construct(__a, _VSTD::__to_raw_pointer(__begin2), _VSTD::move_if_noexcept(*__begin1));
1616 }
1617
1618 template <class _Tp>
1619 _LIBCPP_INLINE_VISIBILITY
1620 static
1621 typename enable_if
1622 <
1623 (__is_default_allocator<allocator_type>::value
1624 || !__has_construct<allocator_type, _Tp*, _Tp>::value) &&
1625 is_trivially_move_constructible<_Tp>::value,
1626 void
1627 >::type
1628 __construct_forward(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2)
1629 {
1630 ptrdiff_t _Np = __end1 - __begin1;
1631 if (_Np > 0)
1632 {
1633 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp));
1634 __begin2 += _Np;
1635 }
1636 }
1637
1638 template <class _Iter, class _Ptr>
1639 _LIBCPP_INLINE_VISIBILITY
1640 static
1641 void
1642 __construct_range_forward(allocator_type& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2)
1643 {
1644 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2)
1645 construct(__a, _VSTD::__to_raw_pointer(__begin2), *__begin1);
1646 }
1647
1648 template <class _SourceTp, class _DestTp,
1649 class _RawSourceTp = typename remove_const<_SourceTp>::type,
1650 class _RawDestTp = typename remove_const<_DestTp>::type>
1651 _LIBCPP_INLINE_VISIBILITY
1652 static
1653 typename enable_if
1654 <
1655 is_trivially_move_constructible<_DestTp>::value &&
1656 is_same<_RawSourceTp, _RawDestTp>::value &&
1657 (__is_default_allocator<allocator_type>::value ||
1658 !__has_construct<allocator_type, _DestTp*, _SourceTp&>::value),
1659 void
1660 >::type
1661 __construct_range_forward(allocator_type&, _SourceTp* __begin1, _SourceTp* __end1, _DestTp*& __begin2)
1662 {
1663 ptrdiff_t _Np = __end1 - __begin1;
1664 if (_Np > 0)
1665 {
1666 _VSTD::memcpy(const_cast<_RawDestTp*>(__begin2), __begin1, _Np * sizeof(_DestTp));
1667 __begin2 += _Np;
1668 }
1669 }
1670
1671 template <class _Ptr>
1672 _LIBCPP_INLINE_VISIBILITY
1673 static
1674 void
1675 __construct_backward(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2)
1676 {
1677 while (__end1 != __begin1)
1678 {
1679 construct(__a, _VSTD::__to_raw_pointer(__end2-1), _VSTD::move_if_noexcept(*--__end1));
1680 --__end2;
1681 }
1682 }
1683
1684 template <class _Tp>
1685 _LIBCPP_INLINE_VISIBILITY
1686 static
1687 typename enable_if
1688 <
1689 (__is_default_allocator<allocator_type>::value
1690 || !__has_construct<allocator_type, _Tp*, _Tp>::value) &&
1691 is_trivially_move_constructible<_Tp>::value,
1692 void
1693 >::type
1694 __construct_backward(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2)
1695 {
1696 ptrdiff_t _Np = __end1 - __begin1;
1697 __end2 -= _Np;
1698 if (_Np > 0)
1699 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp));
1700 }
1701
1702private:
1703
1704 _LIBCPP_INLINE_VISIBILITY
1705 static pointer __allocate(allocator_type& __a, size_type __n,
1706 const_void_pointer __hint, true_type)
1707 {return __a.allocate(__n, __hint);}
1708 _LIBCPP_INLINE_VISIBILITY
1709 static pointer __allocate(allocator_type& __a, size_type __n,
1710 const_void_pointer, false_type)
1711 {return __a.allocate(__n);}
1712
1713#ifndef _LIBCPP_HAS_NO_VARIADICS
1714 template <class _Tp, class... _Args>
1715 _LIBCPP_INLINE_VISIBILITY
1716 static void __construct(true_type, allocator_type& __a, _Tp* __p, _Args&&... __args)
1717 {__a.construct(__p, _VSTD::forward<_Args>(__args)...);}
1718 template <class _Tp, class... _Args>
1719 _LIBCPP_INLINE_VISIBILITY
1720 static void __construct(false_type, allocator_type&, _Tp* __p, _Args&&... __args)
1721 {
1722 ::new ((void*)__p) _Tp(_VSTD::forward<_Args>(__args)...);
1723 }
1724#else // _LIBCPP_HAS_NO_VARIADICS
1725 template <class _Tp, class _A0>
1726 _LIBCPP_INLINE_VISIBILITY
1727 static void __construct(true_type, allocator_type& __a, _Tp* __p,
1728 const _A0& __a0)
1729 {__a.construct(__p, __a0);}
1730 template <class _Tp, class _A0>
1731 _LIBCPP_INLINE_VISIBILITY
1732 static void __construct(false_type, allocator_type&, _Tp* __p,
1733 const _A0& __a0)
1734 {
1735 ::new ((void*)__p) _Tp(__a0);
1736 }
1737#endif // _LIBCPP_HAS_NO_VARIADICS
1738
1739 template <class _Tp>
1740 _LIBCPP_INLINE_VISIBILITY
1741 static void __destroy(true_type, allocator_type& __a, _Tp* __p)
1742 {__a.destroy(__p);}
1743 template <class _Tp>
1744 _LIBCPP_INLINE_VISIBILITY
1745 static void __destroy(false_type, allocator_type&, _Tp* __p)
1746 {
1747 __p->~_Tp();
1748 }
1749
1750 _LIBCPP_INLINE_VISIBILITY
1751 static size_type __max_size(true_type, const allocator_type& __a) _NOEXCEPT
1752 {return __a.max_size();}
1753 _LIBCPP_INLINE_VISIBILITY
1754 static size_type __max_size(false_type, const allocator_type&) _NOEXCEPT
1755 {return numeric_limits<size_type>::max() / sizeof(value_type);}
1756
1757 _LIBCPP_INLINE_VISIBILITY
1758 static allocator_type
1759 __select_on_container_copy_construction(true_type, const allocator_type& __a)
1760 {return __a.select_on_container_copy_construction();}
1761 _LIBCPP_INLINE_VISIBILITY
1762 static allocator_type
1763 __select_on_container_copy_construction(false_type, const allocator_type& __a)
1764 {return __a;}
1765};
1766
1767template <class _Traits, class _Tp>
1768struct __rebind_alloc_helper
1769{
1770#ifndef _LIBCPP_CXX03_LANG
1771 typedef typename _Traits::template rebind_alloc<_Tp> type;
1772#else
1773 typedef typename _Traits::template rebind_alloc<_Tp>::other type;
1774#endif
1775};
1776
1777// allocator
1778
1779template <class _Tp>
1780class _LIBCPP_TEMPLATE_VIS allocator
1781{
1782public:
1783 typedef size_t size_type;
1784 typedef ptrdiff_t difference_type;
1785 typedef _Tp* pointer;
1786 typedef const _Tp* const_pointer;
1787 typedef _Tp& reference;
1788 typedef const _Tp& const_reference;
1789 typedef _Tp value_type;
1790
1791 typedef true_type propagate_on_container_move_assignment;
1792 typedef true_type is_always_equal;
1793
1794 template <class _Up> struct rebind {typedef allocator<_Up> other;};
1795
1796 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
1797 allocator() _NOEXCEPT {}
1798
1799 template <class _Up>
1800 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
1801 allocator(const allocator<_Up>&) _NOEXCEPT {}
1802
1803 _LIBCPP_INLINE_VISIBILITY pointer address(reference __x) const _NOEXCEPT
1804 {return _VSTD::addressof(__x);}
1805 _LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const _NOEXCEPT
1806 {return _VSTD::addressof(__x);}
1807 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY
1808 pointer allocate(size_type __n, allocator<void>::const_pointer = 0)
1809 {
1810 if (__n > max_size())
1811 __throw_length_error("allocator<T>::allocate(size_t n)"
1812 " 'n' exceeds maximum supported size");
1813 return static_cast<pointer>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)));
1814 }
1815 _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type __n) _NOEXCEPT
1816 {_VSTD::__libcpp_deallocate((void*)__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));}
1817 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT
1818 {return size_type(~0) / sizeof(_Tp);}
1819#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1820 template <class _Up, class... _Args>
1821 _LIBCPP_INLINE_VISIBILITY
1822 void
1823 construct(_Up* __p, _Args&&... __args)
1824 {
1825 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...);
1826 }
1827#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1828 _LIBCPP_INLINE_VISIBILITY
1829 void
1830 construct(pointer __p)
1831 {
1832 ::new((void*)__p) _Tp();
1833 }
1834# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
1835
1836 template <class _A0>
1837 _LIBCPP_INLINE_VISIBILITY
1838 void
1839 construct(pointer __p, _A0& __a0)
1840 {
1841 ::new((void*)__p) _Tp(__a0);
1842 }
1843 template <class _A0>
1844 _LIBCPP_INLINE_VISIBILITY
1845 void
1846 construct(pointer __p, const _A0& __a0)
1847 {
1848 ::new((void*)__p) _Tp(__a0);
1849 }
1850# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
1851 template <class _A0, class _A1>
1852 _LIBCPP_INLINE_VISIBILITY
1853 void
1854 construct(pointer __p, _A0& __a0, _A1& __a1)
1855 {
1856 ::new((void*)__p) _Tp(__a0, __a1);
1857 }
1858 template <class _A0, class _A1>
1859 _LIBCPP_INLINE_VISIBILITY
1860 void
1861 construct(pointer __p, const _A0& __a0, _A1& __a1)
1862 {
1863 ::new((void*)__p) _Tp(__a0, __a1);
1864 }
1865 template <class _A0, class _A1>
1866 _LIBCPP_INLINE_VISIBILITY
1867 void
1868 construct(pointer __p, _A0& __a0, const _A1& __a1)
1869 {
1870 ::new((void*)__p) _Tp(__a0, __a1);
1871 }
1872 template <class _A0, class _A1>
1873 _LIBCPP_INLINE_VISIBILITY
1874 void
1875 construct(pointer __p, const _A0& __a0, const _A1& __a1)
1876 {
1877 ::new((void*)__p) _Tp(__a0, __a1);
1878 }
1879#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1880 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();}
1881};
1882
1883template <class _Tp>
1884class _LIBCPP_TEMPLATE_VIS allocator<const _Tp>
1885{
1886public:
1887 typedef size_t size_type;
1888 typedef ptrdiff_t difference_type;
1889 typedef const _Tp* pointer;
1890 typedef const _Tp* const_pointer;
1891 typedef const _Tp& reference;
1892 typedef const _Tp& const_reference;
1893 typedef const _Tp value_type;
1894
1895 typedef true_type propagate_on_container_move_assignment;
1896 typedef true_type is_always_equal;
1897
1898 template <class _Up> struct rebind {typedef allocator<_Up> other;};
1899
1900 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
1901 allocator() _NOEXCEPT {}
1902
1903 template <class _Up>
1904 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
1905 allocator(const allocator<_Up>&) _NOEXCEPT {}
1906
1907 _LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const _NOEXCEPT
1908 {return _VSTD::addressof(__x);}
1909 _LIBCPP_INLINE_VISIBILITY pointer allocate(size_type __n, allocator<void>::const_pointer = 0)
1910 {
1911 if (__n > max_size())
1912 __throw_length_error("allocator<const T>::allocate(size_t n)"
1913 " 'n' exceeds maximum supported size");
1914 return static_cast<pointer>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)));
1915 }
1916 _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type __n) _NOEXCEPT
1917 {_VSTD::__libcpp_deallocate((void*) const_cast<_Tp *>(__p), __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));}
1918 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT
1919 {return size_type(~0) / sizeof(_Tp);}
1920#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1921 template <class _Up, class... _Args>
1922 _LIBCPP_INLINE_VISIBILITY
1923 void
1924 construct(_Up* __p, _Args&&... __args)
1925 {
1926 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...);
1927 }
1928#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1929 _LIBCPP_INLINE_VISIBILITY
1930 void
1931 construct(pointer __p)
1932 {
1933 ::new((void*) const_cast<_Tp *>(__p)) _Tp();
1934 }
1935# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
1936
1937 template <class _A0>
1938 _LIBCPP_INLINE_VISIBILITY
1939 void
1940 construct(pointer __p, _A0& __a0)
1941 {
1942 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0);
1943 }
1944 template <class _A0>
1945 _LIBCPP_INLINE_VISIBILITY
1946 void
1947 construct(pointer __p, const _A0& __a0)
1948 {
1949 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0);
1950 }
1951# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES)
1952 template <class _A0, class _A1>
1953 _LIBCPP_INLINE_VISIBILITY
1954 void
1955 construct(pointer __p, _A0& __a0, _A1& __a1)
1956 {
1957 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1);
1958 }
1959 template <class _A0, class _A1>
1960 _LIBCPP_INLINE_VISIBILITY
1961 void
1962 construct(pointer __p, const _A0& __a0, _A1& __a1)
1963 {
1964 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1);
1965 }
1966 template <class _A0, class _A1>
1967 _LIBCPP_INLINE_VISIBILITY
1968 void
1969 construct(pointer __p, _A0& __a0, const _A1& __a1)
1970 {
1971 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1);
1972 }
1973 template <class _A0, class _A1>
1974 _LIBCPP_INLINE_VISIBILITY
1975 void
1976 construct(pointer __p, const _A0& __a0, const _A1& __a1)
1977 {
1978 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1);
1979 }
1980#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS)
1981 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();}
1982};
1983
1984template <class _Tp, class _Up>
1985inline _LIBCPP_INLINE_VISIBILITY
1986bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;}
1987
1988template <class _Tp, class _Up>
1989inline _LIBCPP_INLINE_VISIBILITY
1990bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;}
1991
1992template <class _OutputIterator, class _Tp>
1993class _LIBCPP_TEMPLATE_VIS raw_storage_iterator
1994 : public iterator<output_iterator_tag,
1995 _Tp, // purposefully not C++03
1996 ptrdiff_t, // purposefully not C++03
1997 _Tp*, // purposefully not C++03
1998 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03
1999{
2000private:
2001 _OutputIterator __x_;
2002public:
2003 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {}
2004 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;}
2005 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element)
2006 {::new(_VSTD::addressof(*__x_)) _Tp(__element); return *this;}
2007#if _LIBCPP_STD_VER >= 14
2008 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element)
2009 {::new(_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;}
2010#endif
2011 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;}
2012 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int)
2013 {raw_storage_iterator __t(*this); ++__x_; return __t;}
2014#if _LIBCPP_STD_VER >= 14
2015 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; }
2016#endif
2017};
2018
2019template <class _Tp>
2020_LIBCPP_NODISCARD_EXT _LIBCPP_NO_CFI
2021pair<_Tp*, ptrdiff_t>
2022get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT
2023{
2024 pair<_Tp*, ptrdiff_t> __r(0, 0);
2025 const ptrdiff_t __m = (~ptrdiff_t(0) ^
2026 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1)))
2027 / sizeof(_Tp);
2028 if (__n > __m)
2029 __n = __m;
2030 while (__n > 0)
2031 {
2032#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION)
2033 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp)))
2034 {
2035 std::align_val_t __al =
2036 std::align_val_t(std::alignment_of<_Tp>::value);
2037 __r.first = static_cast<_Tp*>(::operator new(
2038 __n * sizeof(_Tp), __al, nothrow));
2039 } else {
2040 __r.first = static_cast<_Tp*>(::operator new(
2041 __n * sizeof(_Tp), nothrow));
2042 }
2043#else
2044 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp)))
2045 {
2046 // Since aligned operator new is unavailable, return an empty
2047 // buffer rather than one with invalid alignment.
2048 return __r;
2049 }
2050
2051 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow));
2052#endif
2053
2054 if (__r.first)
2055 {
2056 __r.second = __n;
2057 break;
2058 }
2059 __n /= 2;
2060 }
2061 return __r;
2062}
2063
2064template <class _Tp>
2065inline _LIBCPP_INLINE_VISIBILITY
2066void return_temporary_buffer(_Tp* __p) _NOEXCEPT
2067{
2068 _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp));
2069}
2070
2071#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
2072template <class _Tp>
2073struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref
2074{
2075 _Tp* __ptr_;
2076};
2077
2078template<class _Tp>
2079class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr
2080{
2081private:
2082 _Tp* __ptr_;
2083public:
2084 typedef _Tp element_type;
2085
2086 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) throw() : __ptr_(__p) {}
2087 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) throw() : __ptr_(__p.release()) {}
2088 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) throw()
2089 : __ptr_(__p.release()) {}
2090 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) throw()
2091 {reset(__p.release()); return *this;}
2092 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) throw()
2093 {reset(__p.release()); return *this;}
2094 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) throw()
2095 {reset(__p.__ptr_); return *this;}
2096 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() throw() {delete __ptr_;}
2097
2098 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const throw()
2099 {return *__ptr_;}
2100 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const throw() {return __ptr_;}
2101 _LIBCPP_INLINE_VISIBILITY _Tp* get() const throw() {return __ptr_;}
2102 _LIBCPP_INLINE_VISIBILITY _Tp* release() throw()
2103 {
2104 _Tp* __t = __ptr_;
2105 __ptr_ = 0;
2106 return __t;
2107 }
2108 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) throw()
2109 {
2110 if (__ptr_ != __p)
2111 delete __ptr_;
2112 __ptr_ = __p;
2113 }
2114
2115 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) throw() : __ptr_(__p.__ptr_) {}
2116 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() throw()
2117 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;}
2118 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() throw()
2119 {return auto_ptr<_Up>(release());}
2120};
2121
2122template <>
2123class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void>
2124{
2125public:
2126 typedef void element_type;
2127};
2128#endif
2129
2130template <class _Tp, int _Idx,
2131 bool _CanBeEmptyBase =
2132 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value>
2133struct __compressed_pair_elem {
2134 typedef _Tp _ParamT;
2135 typedef _Tp& reference;
2136 typedef const _Tp& const_reference;
2137
2138#ifndef _LIBCPP_CXX03_LANG
2139 _LIBCPP_INLINE_VISIBILITY constexpr __compressed_pair_elem() : __value_() {}
2140
2141 template <class _Up, class = typename enable_if<
2142 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value
2143 >::type>
2144 _LIBCPP_INLINE_VISIBILITY
2145 constexpr explicit
2146 __compressed_pair_elem(_Up&& __u)
2147 : __value_(_VSTD::forward<_Up>(__u))
2148 {
2149 }
2150
2151 template <class... _Args, size_t... _Indexes>
2152 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
2153 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args,
2154 __tuple_indices<_Indexes...>)
2155 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {}
2156#else
2157 _LIBCPP_INLINE_VISIBILITY __compressed_pair_elem() : __value_() {}
2158 _LIBCPP_INLINE_VISIBILITY
2159 __compressed_pair_elem(_ParamT __p) : __value_(std::forward<_ParamT>(__p)) {}
2160#endif
2161
2162 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; }
2163 _LIBCPP_INLINE_VISIBILITY
2164 const_reference __get() const _NOEXCEPT { return __value_; }
2165
2166private:
2167 _Tp __value_;
2168};
2169
2170template <class _Tp, int _Idx>
2171struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp {
2172 typedef _Tp _ParamT;
2173 typedef _Tp& reference;
2174 typedef const _Tp& const_reference;
2175 typedef _Tp __value_type;
2176
2177#ifndef _LIBCPP_CXX03_LANG
2178 _LIBCPP_INLINE_VISIBILITY constexpr __compressed_pair_elem() = default;
2179
2180 template <class _Up, class = typename enable_if<
2181 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value
2182 >::type>
2183 _LIBCPP_INLINE_VISIBILITY
2184 constexpr explicit
2185 __compressed_pair_elem(_Up&& __u)
2186 : __value_type(_VSTD::forward<_Up>(__u))
2187 {}
2188
2189 template <class... _Args, size_t... _Indexes>
2190 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
2191 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args,
2192 __tuple_indices<_Indexes...>)
2193 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {}
2194#else
2195 _LIBCPP_INLINE_VISIBILITY __compressed_pair_elem() : __value_type() {}
2196 _LIBCPP_INLINE_VISIBILITY
2197 __compressed_pair_elem(_ParamT __p)
2198 : __value_type(std::forward<_ParamT>(__p)) {}
2199#endif
2200
2201 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; }
2202 _LIBCPP_INLINE_VISIBILITY
2203 const_reference __get() const _NOEXCEPT { return *this; }
2204};
2205
2206// Tag used to construct the second element of the compressed pair.
2207struct __second_tag {};
2208
2209template <class _T1, class _T2>
2210class __compressed_pair : private __compressed_pair_elem<_T1, 0>,
2211 private __compressed_pair_elem<_T2, 1> {
2212 typedef __compressed_pair_elem<_T1, 0> _Base1;
2213 typedef __compressed_pair_elem<_T2, 1> _Base2;
2214
2215 // NOTE: This static assert should never fire because __compressed_pair
2216 // is *almost never* used in a scenario where it's possible for T1 == T2.
2217 // (The exception is std::function where it is possible that the function
2218 // object and the allocator have the same type).
2219 static_assert((!is_same<_T1, _T2>::value),
2220 "__compressed_pair cannot be instantated when T1 and T2 are the same type; "
2221 "The current implementation is NOT ABI-compatible with the previous "
2222 "implementation for this configuration");
2223
2224public:
2225#ifndef _LIBCPP_CXX03_LANG
2226 template <bool _Dummy = true,
2227 class = typename enable_if<
2228 __dependent_type<is_default_constructible<_T1>, _Dummy>::value &&
2229 __dependent_type<is_default_constructible<_T2>, _Dummy>::value
2230 >::type
2231 >
2232 _LIBCPP_INLINE_VISIBILITY
2233 constexpr __compressed_pair() {}
2234
2235 template <class _Tp, typename enable_if<!is_same<typename decay<_Tp>::type,
2236 __compressed_pair>::value,
2237 bool>::type = true>
2238 _LIBCPP_INLINE_VISIBILITY constexpr explicit
2239 __compressed_pair(_Tp&& __t)
2240 : _Base1(std::forward<_Tp>(__t)), _Base2() {}
2241
2242 template <class _Tp>
2243 _LIBCPP_INLINE_VISIBILITY constexpr
2244 __compressed_pair(__second_tag, _Tp&& __t)
2245 : _Base1(), _Base2(std::forward<_Tp>(__t)) {}
2246
2247 template <class _U1, class _U2>
2248 _LIBCPP_INLINE_VISIBILITY constexpr
2249 __compressed_pair(_U1&& __t1, _U2&& __t2)
2250 : _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {}
2251
2252 template <class... _Args1, class... _Args2>
2253 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
2254 __compressed_pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args,
2255 tuple<_Args2...> __second_args)
2256 : _Base1(__pc, _VSTD::move(__first_args),
2257 typename __make_tuple_indices<sizeof...(_Args1)>::type()),
2258 _Base2(__pc, _VSTD::move(__second_args),
2259 typename __make_tuple_indices<sizeof...(_Args2)>::type()) {}
2260
2261#else
2262 _LIBCPP_INLINE_VISIBILITY
2263 __compressed_pair() {}
2264
2265 _LIBCPP_INLINE_VISIBILITY explicit
2266 __compressed_pair(_T1 __t1) : _Base1(_VSTD::forward<_T1>(__t1)) {}
2267
2268 _LIBCPP_INLINE_VISIBILITY
2269 __compressed_pair(__second_tag, _T2 __t2)
2270 : _Base1(), _Base2(_VSTD::forward<_T2>(__t2)) {}
2271
2272 _LIBCPP_INLINE_VISIBILITY
2273 __compressed_pair(_T1 __t1, _T2 __t2)
2274 : _Base1(_VSTD::forward<_T1>(__t1)), _Base2(_VSTD::forward<_T2>(__t2)) {}
2275#endif
2276
2277 _LIBCPP_INLINE_VISIBILITY
2278 typename _Base1::reference first() _NOEXCEPT {
2279 return static_cast<_Base1&>(*this).__get();
2280 }
2281
2282 _LIBCPP_INLINE_VISIBILITY
2283 typename _Base1::const_reference first() const _NOEXCEPT {
2284 return static_cast<_Base1 const&>(*this).__get();
2285 }
2286
2287 _LIBCPP_INLINE_VISIBILITY
2288 typename _Base2::reference second() _NOEXCEPT {
2289 return static_cast<_Base2&>(*this).__get();
2290 }
2291
2292 _LIBCPP_INLINE_VISIBILITY
2293 typename _Base2::const_reference second() const _NOEXCEPT {
2294 return static_cast<_Base2 const&>(*this).__get();
2295 }
2296
2297 _LIBCPP_INLINE_VISIBILITY
2298 void swap(__compressed_pair& __x)
2299 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value &&
2300 __is_nothrow_swappable<_T2>::value)
2301 {
2302 using std::swap;
2303 swap(first(), __x.first());
2304 swap(second(), __x.second());
2305 }
2306};
2307
2308template <class _T1, class _T2>
2309inline _LIBCPP_INLINE_VISIBILITY
2310void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y)
2311 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value &&
2312 __is_nothrow_swappable<_T2>::value) {
2313 __x.swap(__y);
2314}
2315
2316// default_delete
2317
2318template <class _Tp>
2319struct _LIBCPP_TEMPLATE_VIS default_delete {
2320 static_assert(!is_function<_Tp>::value,
2321 "default_delete cannot be instantiated for function types");
2322#ifndef _LIBCPP_CXX03_LANG
2323 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() noexcept = default;
2324#else
2325 _LIBCPP_INLINE_VISIBILITY default_delete() {}
2326#endif
2327 template <class _Up>
2328 _LIBCPP_INLINE_VISIBILITY
2329 default_delete(const default_delete<_Up>&,
2330 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* =
2331 0) _NOEXCEPT {}
2332
2333 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT {
2334 static_assert(sizeof(_Tp) > 0,
2335 "default_delete can not delete incomplete type");
2336 static_assert(!is_void<_Tp>::value,
2337 "default_delete can not delete incomplete type");
2338 delete __ptr;
2339 }
2340};
2341
2342template <class _Tp>
2343struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> {
2344private:
2345 template <class _Up>
2346 struct _EnableIfConvertible
2347 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {};
2348
2349public:
2350#ifndef _LIBCPP_CXX03_LANG
2351 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() noexcept = default;
2352#else
2353 _LIBCPP_INLINE_VISIBILITY default_delete() {}
2354#endif
2355
2356 template <class _Up>
2357 _LIBCPP_INLINE_VISIBILITY
2358 default_delete(const default_delete<_Up[]>&,
2359 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {}
2360
2361 template <class _Up>
2362 _LIBCPP_INLINE_VISIBILITY
2363 typename _EnableIfConvertible<_Up>::type
2364 operator()(_Up* __ptr) const _NOEXCEPT {
2365 static_assert(sizeof(_Tp) > 0,
2366 "default_delete can not delete incomplete type");
2367 static_assert(!is_void<_Tp>::value,
2368 "default_delete can not delete void type");
2369 delete[] __ptr;
2370 }
2371};
2372
2373
2374
2375#ifndef _LIBCPP_CXX03_LANG
2376template <class _Deleter>
2377struct __unique_ptr_deleter_sfinae {
2378 static_assert(!is_reference<_Deleter>::value, "incorrect specialization");
2379 typedef const _Deleter& __lval_ref_type;
2380 typedef _Deleter&& __good_rval_ref_type;
2381 typedef true_type __enable_rval_overload;
2382};
2383
2384template <class _Deleter>
2385struct __unique_ptr_deleter_sfinae<_Deleter const&> {
2386 typedef const _Deleter& __lval_ref_type;
2387 typedef const _Deleter&& __bad_rval_ref_type;
2388 typedef false_type __enable_rval_overload;
2389};
2390
2391template <class _Deleter>
2392struct __unique_ptr_deleter_sfinae<_Deleter&> {
2393 typedef _Deleter& __lval_ref_type;
2394 typedef _Deleter&& __bad_rval_ref_type;
2395 typedef false_type __enable_rval_overload;
2396};
2397#endif // !defined(_LIBCPP_CXX03_LANG)
2398
2399template <class _Tp, class _Dp = default_delete<_Tp> >
2400class _LIBCPP_TEMPLATE_VIS unique_ptr {
2401public:
2402 typedef _Tp element_type;
2403 typedef _Dp deleter_type;
2404 typedef typename __pointer_type<_Tp, deleter_type>::type pointer;
2405
2406 static_assert(!is_rvalue_reference<deleter_type>::value,
2407 "the specified deleter type cannot be an rvalue reference");
2408
2409private:
2410 __compressed_pair<pointer, deleter_type> __ptr_;
2411
2412 struct __nat { int __for_bool_; };
2413
2414#ifndef _LIBCPP_CXX03_LANG
2415 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE;
2416
2417 template <bool _Dummy>
2418 using _LValRefType =
2419 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type;
2420
2421 template <bool _Dummy>
2422 using _GoodRValRefType =
2423 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type;
2424
2425 template <bool _Dummy>
2426 using _BadRValRefType =
2427 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type;
2428
2429 template <bool _Dummy, class _Deleter = typename __dependent_type<
2430 __identity<deleter_type>, _Dummy>::type>
2431 using _EnableIfDeleterDefaultConstructible =
2432 typename enable_if<is_default_constructible<_Deleter>::value &&
2433 !is_pointer<_Deleter>::value>::type;
2434
2435 template <class _ArgType>
2436 using _EnableIfDeleterConstructible =
2437 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type;
2438
2439 template <class _UPtr, class _Up>
2440 using _EnableIfMoveConvertible = typename enable_if<
2441 is_convertible<typename _UPtr::pointer, pointer>::value &&
2442 !is_array<_Up>::value
2443 >::type;
2444
2445 template <class _UDel>
2446 using _EnableIfDeleterConvertible = typename enable_if<
2447 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) ||
2448 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value)
2449 >::type;
2450
2451 template <class _UDel>
2452 using _EnableIfDeleterAssignable = typename enable_if<
2453 is_assignable<_Dp&, _UDel&&>::value
2454 >::type;
2455
2456public:
2457 template <bool _Dummy = true,
2458 class = _EnableIfDeleterDefaultConstructible<_Dummy>>
2459 _LIBCPP_INLINE_VISIBILITY
2460 constexpr unique_ptr() noexcept : __ptr_(pointer()) {}
2461
2462 template <bool _Dummy = true,
2463 class = _EnableIfDeleterDefaultConstructible<_Dummy>>
2464 _LIBCPP_INLINE_VISIBILITY
2465 constexpr unique_ptr(nullptr_t) noexcept : __ptr_(pointer()) {}
2466
2467 template <bool _Dummy = true,
2468 class = _EnableIfDeleterDefaultConstructible<_Dummy>>
2469 _LIBCPP_INLINE_VISIBILITY
2470 explicit unique_ptr(pointer __p) noexcept : __ptr_(__p) {}
2471
2472 template <bool _Dummy = true,
2473 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>>
2474 _LIBCPP_INLINE_VISIBILITY
2475 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) noexcept
2476 : __ptr_(__p, __d) {}
2477
2478 template <bool _Dummy = true,
2479 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>>
2480 _LIBCPP_INLINE_VISIBILITY
2481 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) noexcept
2482 : __ptr_(__p, _VSTD::move(__d)) {
2483 static_assert(!is_reference<deleter_type>::value,
2484 "rvalue deleter bound to reference");
2485 }
2486
2487 template <bool _Dummy = true,
2488 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy>>>
2489 _LIBCPP_INLINE_VISIBILITY
2490 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete;
2491
2492 _LIBCPP_INLINE_VISIBILITY
2493 unique_ptr(unique_ptr&& __u) noexcept
2494 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) {
2495 }
2496
2497 template <class _Up, class _Ep,
2498 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>,
2499 class = _EnableIfDeleterConvertible<_Ep>
2500 >
2501 _LIBCPP_INLINE_VISIBILITY
2502 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT
2503 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {}
2504
2505#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
2506 template <class _Up>
2507 _LIBCPP_INLINE_VISIBILITY
2508 unique_ptr(auto_ptr<_Up>&& __p,
2509 typename enable_if<is_convertible<_Up*, _Tp*>::value &&
2510 is_same<_Dp, default_delete<_Tp>>::value,
2511 __nat>::type = __nat()) _NOEXCEPT
2512 : __ptr_(__p.release()) {}
2513#endif
2514
2515 _LIBCPP_INLINE_VISIBILITY
2516 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT {
2517 reset(__u.release());
2518 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter());
2519 return *this;
2520 }
2521
2522 template <class _Up, class _Ep,
2523 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>,
2524 class = _EnableIfDeleterAssignable<_Ep>
2525 >
2526 _LIBCPP_INLINE_VISIBILITY
2527 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT {
2528 reset(__u.release());
2529 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter());
2530 return *this;
2531 }
2532
2533#else // _LIBCPP_CXX03_LANG
2534private:
2535 unique_ptr(unique_ptr&);
2536 template <class _Up, class _Ep> unique_ptr(unique_ptr<_Up, _Ep>&);
2537
2538 unique_ptr& operator=(unique_ptr&);
2539 template <class _Up, class _Ep> unique_ptr& operator=(unique_ptr<_Up, _Ep>&);
2540
2541public:
2542 _LIBCPP_INLINE_VISIBILITY
2543 unique_ptr() : __ptr_(pointer())
2544 {
2545 static_assert(!is_pointer<deleter_type>::value,
2546 "unique_ptr constructed with null function pointer deleter");
2547 static_assert(is_default_constructible<deleter_type>::value,
2548 "unique_ptr::deleter_type is not default constructible");
2549 }
2550 _LIBCPP_INLINE_VISIBILITY
2551 unique_ptr(nullptr_t) : __ptr_(pointer())
2552 {
2553 static_assert(!is_pointer<deleter_type>::value,
2554 "unique_ptr constructed with null function pointer deleter");
2555 }
2556 _LIBCPP_INLINE_VISIBILITY
2557 explicit unique_ptr(pointer __p)
2558 : __ptr_(_VSTD::move(__p)) {
2559 static_assert(!is_pointer<deleter_type>::value,
2560 "unique_ptr constructed with null function pointer deleter");
2561 }
2562
2563 _LIBCPP_INLINE_VISIBILITY
2564 operator __rv<unique_ptr>() {
2565 return __rv<unique_ptr>(*this);
2566 }
2567
2568 _LIBCPP_INLINE_VISIBILITY
2569 unique_ptr(__rv<unique_ptr> __u)
2570 : __ptr_(__u->release(),
2571 _VSTD::forward<deleter_type>(__u->get_deleter())) {}
2572
2573 template <class _Up, class _Ep>
2574 _LIBCPP_INLINE_VISIBILITY
2575 typename enable_if<
2576 !is_array<_Up>::value &&
2577 is_convertible<typename unique_ptr<_Up, _Ep>::pointer,
2578 pointer>::value &&
2579 is_assignable<deleter_type&, _Ep&>::value,
2580 unique_ptr&>::type
2581 operator=(unique_ptr<_Up, _Ep> __u) {
2582 reset(__u.release());
2583 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter());
2584 return *this;
2585 }
2586
2587 _LIBCPP_INLINE_VISIBILITY
2588 unique_ptr(pointer __p, deleter_type __d)
2589 : __ptr_(_VSTD::move(__p), _VSTD::move(__d)) {}
2590#endif // _LIBCPP_CXX03_LANG
2591
2592#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
2593 template <class _Up>
2594 _LIBCPP_INLINE_VISIBILITY
2595 typename enable_if<is_convertible<_Up*, _Tp*>::value &&
2596 is_same<_Dp, default_delete<_Tp> >::value,
2597 unique_ptr&>::type
2598 operator=(auto_ptr<_Up> __p) {
2599 reset(__p.release());
2600 return *this;
2601 }
2602#endif
2603
2604 _LIBCPP_INLINE_VISIBILITY
2605 ~unique_ptr() { reset(); }
2606
2607 _LIBCPP_INLINE_VISIBILITY
2608 unique_ptr& operator=(nullptr_t) _NOEXCEPT {
2609 reset();
2610 return *this;
2611 }
2612
2613 _LIBCPP_INLINE_VISIBILITY
2614 typename add_lvalue_reference<_Tp>::type
2615 operator*() const {
2616 return *__ptr_.first();
2617 }
2618 _LIBCPP_INLINE_VISIBILITY
2619 pointer operator->() const _NOEXCEPT {
2620 return __ptr_.first();
2621 }
2622 _LIBCPP_INLINE_VISIBILITY
2623 pointer get() const _NOEXCEPT {
2624 return __ptr_.first();
2625 }
2626 _LIBCPP_INLINE_VISIBILITY
2627 deleter_type& get_deleter() _NOEXCEPT {
2628 return __ptr_.second();
2629 }
2630 _LIBCPP_INLINE_VISIBILITY
2631 const deleter_type& get_deleter() const _NOEXCEPT {
2632 return __ptr_.second();
2633 }
2634 _LIBCPP_INLINE_VISIBILITY
2635 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {
2636 return __ptr_.first() != nullptr;
2637 }
2638
2639 _LIBCPP_INLINE_VISIBILITY
2640 pointer release() _NOEXCEPT {
2641 pointer __t = __ptr_.first();
2642 __ptr_.first() = pointer();
2643 return __t;
2644 }
2645
2646 _LIBCPP_INLINE_VISIBILITY
2647 void reset(pointer __p = pointer()) _NOEXCEPT {
2648 pointer __tmp = __ptr_.first();
2649 __ptr_.first() = __p;
2650 if (__tmp)
2651 __ptr_.second()(__tmp);
2652 }
2653
2654 _LIBCPP_INLINE_VISIBILITY
2655 void swap(unique_ptr& __u) _NOEXCEPT {
2656 __ptr_.swap(__u.__ptr_);
2657 }
2658};
2659
2660
2661template <class _Tp, class _Dp>
2662class _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> {
2663public:
2664 typedef _Tp element_type;
2665 typedef _Dp deleter_type;
2666 typedef typename __pointer_type<_Tp, deleter_type>::type pointer;
2667
2668private:
2669 __compressed_pair<pointer, deleter_type> __ptr_;
2670
2671 template <class _From>
2672 struct _CheckArrayPointerConversion : is_same<_From, pointer> {};
2673
2674 template <class _FromElem>
2675 struct _CheckArrayPointerConversion<_FromElem*>
2676 : integral_constant<bool,
2677 is_same<_FromElem*, pointer>::value ||
2678 (is_same<pointer, element_type*>::value &&
2679 is_convertible<_FromElem(*)[], element_type(*)[]>::value)
2680 >
2681 {};
2682
2683#ifndef _LIBCPP_CXX03_LANG
2684 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE;
2685
2686 template <bool _Dummy>
2687 using _LValRefType =
2688 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type;
2689
2690 template <bool _Dummy>
2691 using _GoodRValRefType =
2692 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type;
2693
2694 template <bool _Dummy>
2695 using _BadRValRefType =
2696 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type;
2697
2698 template <bool _Dummy, class _Deleter = typename __dependent_type<
2699 __identity<deleter_type>, _Dummy>::type>
2700 using _EnableIfDeleterDefaultConstructible =
2701 typename enable_if<is_default_constructible<_Deleter>::value &&
2702 !is_pointer<_Deleter>::value>::type;
2703
2704 template <class _ArgType>
2705 using _EnableIfDeleterConstructible =
2706 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type;
2707
2708 template <class _Pp>
2709 using _EnableIfPointerConvertible = typename enable_if<
2710 _CheckArrayPointerConversion<_Pp>::value
2711 >::type;
2712
2713 template <class _UPtr, class _Up,
2714 class _ElemT = typename _UPtr::element_type>
2715 using _EnableIfMoveConvertible = typename enable_if<
2716 is_array<_Up>::value &&
2717 is_same<pointer, element_type*>::value &&
2718 is_same<typename _UPtr::pointer, _ElemT*>::value &&
2719 is_convertible<_ElemT(*)[], element_type(*)[]>::value
2720 >::type;
2721
2722 template <class _UDel>
2723 using _EnableIfDeleterConvertible = typename enable_if<
2724 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) ||
2725 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value)
2726 >::type;
2727
2728 template <class _UDel>
2729 using _EnableIfDeleterAssignable = typename enable_if<
2730 is_assignable<_Dp&, _UDel&&>::value
2731 >::type;
2732
2733public:
2734 template <bool _Dummy = true,
2735 class = _EnableIfDeleterDefaultConstructible<_Dummy>>
2736 _LIBCPP_INLINE_VISIBILITY
2737 constexpr unique_ptr() noexcept : __ptr_(pointer()) {}
2738
2739 template <bool _Dummy = true,
2740 class = _EnableIfDeleterDefaultConstructible<_Dummy>>
2741 _LIBCPP_INLINE_VISIBILITY
2742 constexpr unique_ptr(nullptr_t) noexcept : __ptr_(pointer()) {}
2743
2744 template <class _Pp, bool _Dummy = true,
2745 class = _EnableIfDeleterDefaultConstructible<_Dummy>,
2746 class = _EnableIfPointerConvertible<_Pp>>
2747 _LIBCPP_INLINE_VISIBILITY
2748 explicit unique_ptr(_Pp __p) noexcept
2749 : __ptr_(__p) {}
2750
2751 template <class _Pp, bool _Dummy = true,
2752 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>,
2753 class = _EnableIfPointerConvertible<_Pp>>
2754 _LIBCPP_INLINE_VISIBILITY
2755 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) noexcept
2756 : __ptr_(__p, __d) {}
2757
2758 template <bool _Dummy = true,
2759 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>>
2760 _LIBCPP_INLINE_VISIBILITY
2761 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) noexcept
2762 : __ptr_(nullptr, __d) {}
2763
2764 template <class _Pp, bool _Dummy = true,
2765 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>,
2766 class = _EnableIfPointerConvertible<_Pp>>
2767 _LIBCPP_INLINE_VISIBILITY
2768 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) noexcept
2769 : __ptr_(__p, _VSTD::move(__d)) {
2770 static_assert(!is_reference<deleter_type>::value,
2771 "rvalue deleter bound to reference");
2772 }
2773
2774 template <bool _Dummy = true,
2775 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>>
2776 _LIBCPP_INLINE_VISIBILITY
2777 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) noexcept
2778 : __ptr_(nullptr, _VSTD::move(__d)) {
2779 static_assert(!is_reference<deleter_type>::value,
2780 "rvalue deleter bound to reference");
2781 }
2782
2783 template <class _Pp, bool _Dummy = true,
2784 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy>>,
2785 class = _EnableIfPointerConvertible<_Pp>>
2786 _LIBCPP_INLINE_VISIBILITY
2787 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete;
2788
2789 _LIBCPP_INLINE_VISIBILITY
2790 unique_ptr(unique_ptr&& __u) noexcept
2791 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) {
2792 }
2793
2794 _LIBCPP_INLINE_VISIBILITY
2795 unique_ptr& operator=(unique_ptr&& __u) noexcept {
2796 reset(__u.release());
2797 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter());
2798 return *this;
2799 }
2800
2801 template <class _Up, class _Ep,
2802 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>,
2803 class = _EnableIfDeleterConvertible<_Ep>
2804 >
2805 _LIBCPP_INLINE_VISIBILITY
2806 unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept
2807 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {
2808 }
2809
2810 template <class _Up, class _Ep,
2811 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>,
2812 class = _EnableIfDeleterAssignable<_Ep>
2813 >
2814 _LIBCPP_INLINE_VISIBILITY
2815 unique_ptr&
2816 operator=(unique_ptr<_Up, _Ep>&& __u) noexcept {
2817 reset(__u.release());
2818 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter());
2819 return *this;
2820 }
2821
2822#else // _LIBCPP_CXX03_LANG
2823private:
2824 template <class _Up> explicit unique_ptr(_Up);
2825
2826 unique_ptr(unique_ptr&);
2827 template <class _Up> unique_ptr(unique_ptr<_Up>&);
2828
2829 unique_ptr& operator=(unique_ptr&);
2830 template <class _Up> unique_ptr& operator=(unique_ptr<_Up>&);
2831
2832 template <class _Up>
2833 unique_ptr(_Up __u,
2834 typename conditional<
2835 is_reference<deleter_type>::value, deleter_type,
2836 typename add_lvalue_reference<const deleter_type>::type>::type,
2837 typename enable_if<is_convertible<_Up, pointer>::value,
2838 __nat>::type = __nat());
2839public:
2840 _LIBCPP_INLINE_VISIBILITY
2841 unique_ptr() : __ptr_(pointer()) {
2842 static_assert(!is_pointer<deleter_type>::value,
2843 "unique_ptr constructed with null function pointer deleter");
2844 }
2845 _LIBCPP_INLINE_VISIBILITY
2846 unique_ptr(nullptr_t) : __ptr_(pointer()) {
2847 static_assert(!is_pointer<deleter_type>::value,
2848 "unique_ptr constructed with null function pointer deleter");
2849 }
2850
2851 _LIBCPP_INLINE_VISIBILITY
2852 explicit unique_ptr(pointer __p) : __ptr_(__p) {
2853 static_assert(!is_pointer<deleter_type>::value,
2854 "unique_ptr constructed with null function pointer deleter");
2855 }
2856
2857 _LIBCPP_INLINE_VISIBILITY
2858 unique_ptr(pointer __p, deleter_type __d)
2859 : __ptr_(__p, _VSTD::forward<deleter_type>(__d)) {}
2860
2861 _LIBCPP_INLINE_VISIBILITY
2862 unique_ptr(nullptr_t, deleter_type __d)
2863 : __ptr_(pointer(), _VSTD::forward<deleter_type>(__d)) {}
2864
2865 _LIBCPP_INLINE_VISIBILITY
2866 operator __rv<unique_ptr>() {
2867 return __rv<unique_ptr>(*this);
2868 }
2869
2870 _LIBCPP_INLINE_VISIBILITY
2871 unique_ptr(__rv<unique_ptr> __u)
2872 : __ptr_(__u->release(),
2873 _VSTD::forward<deleter_type>(__u->get_deleter())) {}
2874
2875 _LIBCPP_INLINE_VISIBILITY
2876 unique_ptr& operator=(__rv<unique_ptr> __u) {
2877 reset(__u->release());
2878 __ptr_.second() = _VSTD::forward<deleter_type>(__u->get_deleter());
2879 return *this;
2880 }
2881
2882#endif // _LIBCPP_CXX03_LANG
2883
2884public:
2885 _LIBCPP_INLINE_VISIBILITY
2886 ~unique_ptr() { reset(); }
2887
2888 _LIBCPP_INLINE_VISIBILITY
2889 unique_ptr& operator=(nullptr_t) _NOEXCEPT {
2890 reset();
2891 return *this;
2892 }
2893
2894 _LIBCPP_INLINE_VISIBILITY
2895 typename add_lvalue_reference<_Tp>::type
2896 operator[](size_t __i) const {
2897 return __ptr_.first()[__i];
2898 }
2899 _LIBCPP_INLINE_VISIBILITY
2900 pointer get() const _NOEXCEPT {
2901 return __ptr_.first();
2902 }
2903
2904 _LIBCPP_INLINE_VISIBILITY
2905 deleter_type& get_deleter() _NOEXCEPT {
2906 return __ptr_.second();
2907 }
2908
2909 _LIBCPP_INLINE_VISIBILITY
2910 const deleter_type& get_deleter() const _NOEXCEPT {
2911 return __ptr_.second();
2912 }
2913 _LIBCPP_INLINE_VISIBILITY
2914 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {
2915 return __ptr_.first() != nullptr;
2916 }
2917
2918 _LIBCPP_INLINE_VISIBILITY
2919 pointer release() _NOEXCEPT {
2920 pointer __t = __ptr_.first();
2921 __ptr_.first() = pointer();
2922 return __t;
2923 }
2924
2925 template <class _Pp>
2926 _LIBCPP_INLINE_VISIBILITY
2927 typename enable_if<
2928 _CheckArrayPointerConversion<_Pp>::value
2929 >::type
2930 reset(_Pp __p) _NOEXCEPT {
2931 pointer __tmp = __ptr_.first();
2932 __ptr_.first() = __p;
2933 if (__tmp)
2934 __ptr_.second()(__tmp);
2935 }
2936
2937 _LIBCPP_INLINE_VISIBILITY
2938 void reset(nullptr_t = nullptr) _NOEXCEPT {
2939 pointer __tmp = __ptr_.first();
2940 __ptr_.first() = nullptr;
2941 if (__tmp)
2942 __ptr_.second()(__tmp);
2943 }
2944
2945 _LIBCPP_INLINE_VISIBILITY
2946 void swap(unique_ptr& __u) _NOEXCEPT {
2947 __ptr_.swap(__u.__ptr_);
2948 }
2949
2950};
2951
2952template <class _Tp, class _Dp>
2953inline _LIBCPP_INLINE_VISIBILITY
2954typename enable_if<
2955 __is_swappable<_Dp>::value,
2956 void
2957>::type
2958swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);}
2959
2960template <class _T1, class _D1, class _T2, class _D2>
2961inline _LIBCPP_INLINE_VISIBILITY
2962bool
2963operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();}
2964
2965template <class _T1, class _D1, class _T2, class _D2>
2966inline _LIBCPP_INLINE_VISIBILITY
2967bool
2968operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);}
2969
2970template <class _T1, class _D1, class _T2, class _D2>
2971inline _LIBCPP_INLINE_VISIBILITY
2972bool
2973operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y)
2974{
2975 typedef typename unique_ptr<_T1, _D1>::pointer _P1;
2976 typedef typename unique_ptr<_T2, _D2>::pointer _P2;
2977 typedef typename common_type<_P1, _P2>::type _Vp;
2978 return less<_Vp>()(__x.get(), __y.get());
2979}
2980
2981template <class _T1, class _D1, class _T2, class _D2>
2982inline _LIBCPP_INLINE_VISIBILITY
2983bool
2984operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;}
2985
2986template <class _T1, class _D1, class _T2, class _D2>
2987inline _LIBCPP_INLINE_VISIBILITY
2988bool
2989operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);}
2990
2991template <class _T1, class _D1, class _T2, class _D2>
2992inline _LIBCPP_INLINE_VISIBILITY
2993bool
2994operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);}
2995
2996template <class _T1, class _D1>
2997inline _LIBCPP_INLINE_VISIBILITY
2998bool
2999operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT
3000{
3001 return !__x;
3002}
3003
3004template <class _T1, class _D1>
3005inline _LIBCPP_INLINE_VISIBILITY
3006bool
3007operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT
3008{
3009 return !__x;
3010}
3011
3012template <class _T1, class _D1>
3013inline _LIBCPP_INLINE_VISIBILITY
3014bool
3015operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT
3016{
3017 return static_cast<bool>(__x);
3018}
3019
3020template <class _T1, class _D1>
3021inline _LIBCPP_INLINE_VISIBILITY
3022bool
3023operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT
3024{
3025 return static_cast<bool>(__x);
3026}
3027
3028template <class _T1, class _D1>
3029inline _LIBCPP_INLINE_VISIBILITY
3030bool
3031operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t)
3032{
3033 typedef typename unique_ptr<_T1, _D1>::pointer _P1;
3034 return less<_P1>()(__x.get(), nullptr);
3035}
3036
3037template <class _T1, class _D1>
3038inline _LIBCPP_INLINE_VISIBILITY
3039bool
3040operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x)
3041{
3042 typedef typename unique_ptr<_T1, _D1>::pointer _P1;
3043 return less<_P1>()(nullptr, __x.get());
3044}
3045
3046template <class _T1, class _D1>
3047inline _LIBCPP_INLINE_VISIBILITY
3048bool
3049operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t)
3050{
3051 return nullptr < __x;
3052}
3053
3054template <class _T1, class _D1>
3055inline _LIBCPP_INLINE_VISIBILITY
3056bool
3057operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x)
3058{
3059 return __x < nullptr;
3060}
3061
3062template <class _T1, class _D1>
3063inline _LIBCPP_INLINE_VISIBILITY
3064bool
3065operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t)
3066{
3067 return !(nullptr < __x);
3068}
3069
3070template <class _T1, class _D1>
3071inline _LIBCPP_INLINE_VISIBILITY
3072bool
3073operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x)
3074{
3075 return !(__x < nullptr);
3076}
3077
3078template <class _T1, class _D1>
3079inline _LIBCPP_INLINE_VISIBILITY
3080bool
3081operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t)
3082{
3083 return !(__x < nullptr);
3084}
3085
3086template <class _T1, class _D1>
3087inline _LIBCPP_INLINE_VISIBILITY
3088bool
3089operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x)
3090{
3091 return !(nullptr < __x);
3092}
3093
3094#ifdef _LIBCPP_HAS_NO_RVALUE_REFERENCES
3095
3096template <class _Tp, class _Dp>
3097inline _LIBCPP_INLINE_VISIBILITY
3098unique_ptr<_Tp, _Dp>
3099move(unique_ptr<_Tp, _Dp>& __t)
3100{
3101 return unique_ptr<_Tp, _Dp>(__rv<unique_ptr<_Tp, _Dp> >(__t));
3102}
3103
3104#endif
3105
3106#if _LIBCPP_STD_VER > 11
3107
3108template<class _Tp>
3109struct __unique_if
3110{
3111 typedef unique_ptr<_Tp> __unique_single;
3112};
3113
3114template<class _Tp>
3115struct __unique_if<_Tp[]>
3116{
3117 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound;
3118};
3119
3120template<class _Tp, size_t _Np>
3121struct __unique_if<_Tp[_Np]>
3122{
3123 typedef void __unique_array_known_bound;
3124};
3125
3126template<class _Tp, class... _Args>
3127inline _LIBCPP_INLINE_VISIBILITY
3128typename __unique_if<_Tp>::__unique_single
3129make_unique(_Args&&... __args)
3130{
3131 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...));
3132}
3133
3134template<class _Tp>
3135inline _LIBCPP_INLINE_VISIBILITY
3136typename __unique_if<_Tp>::__unique_array_unknown_bound
3137make_unique(size_t __n)
3138{
3139 typedef typename remove_extent<_Tp>::type _Up;
3140 return unique_ptr<_Tp>(new _Up[__n]());
3141}
3142
3143template<class _Tp, class... _Args>
3144 typename __unique_if<_Tp>::__unique_array_known_bound
3145 make_unique(_Args&&...) = delete;
3146
3147#endif // _LIBCPP_STD_VER > 11
3148
3149template <class _Tp, class _Dp>
3150#ifdef _LIBCPP_CXX03_LANG
3151struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> >
3152#else
3153struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper<
3154 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer>>
3155#endif
3156{
3157 typedef unique_ptr<_Tp, _Dp> argument_type;
3158 typedef size_t result_type;
3159 _LIBCPP_INLINE_VISIBILITY
3160 result_type operator()(const argument_type& __ptr) const
3161 {
3162 typedef typename argument_type::pointer pointer;
3163 return hash<pointer>()(__ptr.get());
3164 }
3165};
3166
3167struct __destruct_n
3168{
3169private:
3170 size_t __size_;
3171
3172 template <class _Tp>
3173 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT
3174 {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();}
3175
3176 template <class _Tp>
3177 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT
3178 {}
3179
3180 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT
3181 {++__size_;}
3182 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT
3183 {}
3184
3185 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT
3186 {__size_ = __s;}
3187 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT
3188 {}
3189public:
3190 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT
3191 : __size_(__s) {}
3192
3193 template <class _Tp>
3194 _LIBCPP_INLINE_VISIBILITY void __incr(_Tp*) _NOEXCEPT
3195 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());}
3196
3197 template <class _Tp>
3198 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT
3199 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());}
3200
3201 template <class _Tp>
3202 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT
3203 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());}
3204};
3205
3206template <class _Alloc>
3207class __allocator_destructor
3208{
3209 typedef allocator_traits<_Alloc> __alloc_traits;
3210public:
3211 typedef typename __alloc_traits::pointer pointer;
3212 typedef typename __alloc_traits::size_type size_type;
3213private:
3214 _Alloc& __alloc_;
3215 size_type __s_;
3216public:
3217 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s)
3218 _NOEXCEPT
3219 : __alloc_(__a), __s_(__s) {}
3220 _LIBCPP_INLINE_VISIBILITY
3221 void operator()(pointer __p) _NOEXCEPT
3222 {__alloc_traits::deallocate(__alloc_, __p, __s_);}
3223};
3224
3225template <class _InputIterator, class _ForwardIterator>
3226_ForwardIterator
3227uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r)
3228{
3229 typedef typename iterator_traits<_ForwardIterator>::value_type value_type;
3230#ifndef _LIBCPP_NO_EXCEPTIONS
3231 _ForwardIterator __s = __r;
3232 try
3233 {
3234#endif
3235 for (; __f != __l; ++__f, (void) ++__r)
3236 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f);
3237#ifndef _LIBCPP_NO_EXCEPTIONS
3238 }
3239 catch (...)
3240 {
3241 for (; __s != __r; ++__s)
3242 __s->~value_type();
3243 throw;
3244 }
3245#endif
3246 return __r;
3247}
3248
3249template <class _InputIterator, class _Size, class _ForwardIterator>
3250_ForwardIterator
3251uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r)
3252{
3253 typedef typename iterator_traits<_ForwardIterator>::value_type value_type;
3254#ifndef _LIBCPP_NO_EXCEPTIONS
3255 _ForwardIterator __s = __r;
3256 try
3257 {
3258#endif
3259 for (; __n > 0; ++__f, (void) ++__r, (void) --__n)
3260 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f);
3261#ifndef _LIBCPP_NO_EXCEPTIONS
3262 }
3263 catch (...)
3264 {
3265 for (; __s != __r; ++__s)
3266 __s->~value_type();
3267 throw;
3268 }
3269#endif
3270 return __r;
3271}
3272
3273template <class _ForwardIterator, class _Tp>
3274void
3275uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x)
3276{
3277 typedef typename iterator_traits<_ForwardIterator>::value_type value_type;
3278#ifndef _LIBCPP_NO_EXCEPTIONS
3279 _ForwardIterator __s = __f;
3280 try
3281 {
3282#endif
3283 for (; __f != __l; ++__f)
3284 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x);
3285#ifndef _LIBCPP_NO_EXCEPTIONS
3286 }
3287 catch (...)
3288 {
3289 for (; __s != __f; ++__s)
3290 __s->~value_type();
3291 throw;
3292 }
3293#endif
3294}
3295
3296template <class _ForwardIterator, class _Size, class _Tp>
3297_ForwardIterator
3298uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x)
3299{
3300 typedef typename iterator_traits<_ForwardIterator>::value_type value_type;
3301#ifndef _LIBCPP_NO_EXCEPTIONS
3302 _ForwardIterator __s = __f;
3303 try
3304 {
3305#endif
3306 for (; __n > 0; ++__f, (void) --__n)
3307 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x);
3308#ifndef _LIBCPP_NO_EXCEPTIONS
3309 }
3310 catch (...)
3311 {
3312 for (; __s != __f; ++__s)
3313 __s->~value_type();
3314 throw;
3315 }
3316#endif
3317 return __f;
3318}
3319
3320#if _LIBCPP_STD_VER > 14
3321
3322template <class _Tp>
3323inline _LIBCPP_INLINE_VISIBILITY
3324void destroy_at(_Tp* __loc) {
3325 _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at");
3326 __loc->~_Tp();
3327}
3328
3329template <class _ForwardIterator>
3330inline _LIBCPP_INLINE_VISIBILITY
3331void destroy(_ForwardIterator __first, _ForwardIterator __last) {
3332 for (; __first != __last; ++__first)
3333 _VSTD::destroy_at(_VSTD::addressof(*__first));
3334}
3335
3336template <class _ForwardIterator, class _Size>
3337inline _LIBCPP_INLINE_VISIBILITY
3338_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) {
3339 for (; __n > 0; (void)++__first, --__n)
3340 _VSTD::destroy_at(_VSTD::addressof(*__first));
3341 return __first;
3342}
3343
3344template <class _ForwardIterator>
3345inline _LIBCPP_INLINE_VISIBILITY
3346void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) {
3347 using _Vt = typename iterator_traits<_ForwardIterator>::value_type;
3348 auto __idx = __first;
3349#ifndef _LIBCPP_NO_EXCEPTIONS
3350 try {
3351#endif
3352 for (; __idx != __last; ++__idx)
3353 ::new((void*)_VSTD::addressof(*__idx)) _Vt;
3354#ifndef _LIBCPP_NO_EXCEPTIONS
3355 } catch (...) {
3356 _VSTD::destroy(__first, __idx);
3357 throw;
3358 }
3359#endif
3360}
3361
3362template <class _ForwardIterator, class _Size>
3363inline _LIBCPP_INLINE_VISIBILITY
3364_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) {
3365 using _Vt = typename iterator_traits<_ForwardIterator>::value_type;
3366 auto __idx = __first;
3367#ifndef _LIBCPP_NO_EXCEPTIONS
3368 try {
3369#endif
3370 for (; __n > 0; (void)++__idx, --__n)
3371 ::new((void*)_VSTD::addressof(*__idx)) _Vt;
3372 return __idx;
3373#ifndef _LIBCPP_NO_EXCEPTIONS
3374 } catch (...) {
3375 _VSTD::destroy(__first, __idx);
3376 throw;
3377 }
3378#endif
3379}
3380
3381
3382template <class _ForwardIterator>
3383inline _LIBCPP_INLINE_VISIBILITY
3384void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) {
3385 using _Vt = typename iterator_traits<_ForwardIterator>::value_type;
3386 auto __idx = __first;
3387#ifndef _LIBCPP_NO_EXCEPTIONS
3388 try {
3389#endif
3390 for (; __idx != __last; ++__idx)
3391 ::new((void*)_VSTD::addressof(*__idx)) _Vt();
3392#ifndef _LIBCPP_NO_EXCEPTIONS
3393 } catch (...) {
3394 _VSTD::destroy(__first, __idx);
3395 throw;
3396 }
3397#endif
3398}
3399
3400template <class _ForwardIterator, class _Size>
3401inline _LIBCPP_INLINE_VISIBILITY
3402_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) {
3403 using _Vt = typename iterator_traits<_ForwardIterator>::value_type;
3404 auto __idx = __first;
3405#ifndef _LIBCPP_NO_EXCEPTIONS
3406 try {
3407#endif
3408 for (; __n > 0; (void)++__idx, --__n)
3409 ::new((void*)_VSTD::addressof(*__idx)) _Vt();
3410 return __idx;
3411#ifndef _LIBCPP_NO_EXCEPTIONS
3412 } catch (...) {
3413 _VSTD::destroy(__first, __idx);
3414 throw;
3415 }
3416#endif
3417}
3418
3419
3420template <class _InputIt, class _ForwardIt>
3421inline _LIBCPP_INLINE_VISIBILITY
3422_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) {
3423 using _Vt = typename iterator_traits<_ForwardIt>::value_type;
3424 auto __idx = __first_res;
3425#ifndef _LIBCPP_NO_EXCEPTIONS
3426 try {
3427#endif
3428 for (; __first != __last; (void)++__idx, ++__first)
3429 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first));
3430 return __idx;
3431#ifndef _LIBCPP_NO_EXCEPTIONS
3432 } catch (...) {
3433 _VSTD::destroy(__first_res, __idx);
3434 throw;
3435 }
3436#endif
3437}
3438
3439template <class _InputIt, class _Size, class _ForwardIt>
3440inline _LIBCPP_INLINE_VISIBILITY
3441pair<_InputIt, _ForwardIt>
3442uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) {
3443 using _Vt = typename iterator_traits<_ForwardIt>::value_type;
3444 auto __idx = __first_res;
3445#ifndef _LIBCPP_NO_EXCEPTIONS
3446 try {
3447#endif
3448 for (; __n > 0; ++__idx, (void)++__first, --__n)
3449 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first));
3450 return {__first, __idx};
3451#ifndef _LIBCPP_NO_EXCEPTIONS
3452 } catch (...) {
3453 _VSTD::destroy(__first_res, __idx);
3454 throw;
3455 }
3456#endif
3457}
3458
3459
3460#endif // _LIBCPP_STD_VER > 14
3461
3462// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively)
3463// should be sufficient for thread safety.
3464// See https://bugs.llvm.org/show_bug.cgi?id=22803
3465#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \
3466 && defined(__ATOMIC_RELAXED) \
3467 && defined(__ATOMIC_ACQ_REL)
3468# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT
3469#elif !defined(__clang__) && defined(_GNUC_VER) && _GNUC_VER >= 407
3470# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT
3471#endif
3472
3473template <class _Tp>
3474inline _LIBCPP_INLINE_VISIBILITY _Tp
3475__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT
3476{
3477#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS)
3478 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED);
3479#else
3480 return __t += 1;
3481#endif
3482}
3483
3484template <class _Tp>
3485inline _LIBCPP_INLINE_VISIBILITY _Tp
3486__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT
3487{
3488#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS)
3489 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL);
3490#else
3491 return __t -= 1;
3492#endif
3493}
3494
3495class _LIBCPP_EXCEPTION_ABI bad_weak_ptr
3496 : public std::exception
3497{
3498public:
3499 virtual ~bad_weak_ptr() _NOEXCEPT;
3500 virtual const char* what() const _NOEXCEPT;
3501};
3502
3503_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY
3504void __throw_bad_weak_ptr()
3505{
3506#ifndef _LIBCPP_NO_EXCEPTIONS
3507 throw bad_weak_ptr();
3508#else
3509 _VSTD::abort();
3510#endif
3511}
3512
3513template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr;
3514
3515class _LIBCPP_TYPE_VIS __shared_count
3516{
3517 __shared_count(const __shared_count&);
3518 __shared_count& operator=(const __shared_count&);
3519
3520protected:
3521 long __shared_owners_;
3522 virtual ~__shared_count();
3523private:
3524 virtual void __on_zero_shared() _NOEXCEPT = 0;
3525
3526public:
3527 _LIBCPP_INLINE_VISIBILITY
3528 explicit __shared_count(long __refs = 0) _NOEXCEPT
3529 : __shared_owners_(__refs) {}
3530
3531#if defined(_LIBCPP_BUILDING_LIBRARY) && \
3532 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS)
3533 void __add_shared() _NOEXCEPT;
3534 bool __release_shared() _NOEXCEPT;
3535#else
3536 _LIBCPP_INLINE_VISIBILITY
3537 void __add_shared() _NOEXCEPT {
3538 __libcpp_atomic_refcount_increment(__shared_owners_);
3539 }
3540 _LIBCPP_INLINE_VISIBILITY
3541 bool __release_shared() _NOEXCEPT {
3542 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) {
3543 __on_zero_shared();
3544 return true;
3545 }
3546 return false;
3547 }
3548#endif
3549 _LIBCPP_INLINE_VISIBILITY
3550 long use_count() const _NOEXCEPT {
3551 return __libcpp_relaxed_load(&__shared_owners_) + 1;
3552 }
3553};
3554
3555class _LIBCPP_TYPE_VIS __shared_weak_count
3556 : private __shared_count
3557{
3558 long __shared_weak_owners_;
3559
3560public:
3561 _LIBCPP_INLINE_VISIBILITY
3562 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT
3563 : __shared_count(__refs),
3564 __shared_weak_owners_(__refs) {}
3565protected:
3566 virtual ~__shared_weak_count();
3567
3568public:
3569#if defined(_LIBCPP_BUILDING_LIBRARY) && \
3570 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS)
3571 void __add_shared() _NOEXCEPT;
3572 void __add_weak() _NOEXCEPT;
3573 void __release_shared() _NOEXCEPT;
3574#else
3575 _LIBCPP_INLINE_VISIBILITY
3576 void __add_shared() _NOEXCEPT {
3577 __shared_count::__add_shared();
3578 }
3579 _LIBCPP_INLINE_VISIBILITY
3580 void __add_weak() _NOEXCEPT {
3581 __libcpp_atomic_refcount_increment(__shared_weak_owners_);
3582 }
3583 _LIBCPP_INLINE_VISIBILITY
3584 void __release_shared() _NOEXCEPT {
3585 if (__shared_count::__release_shared())
3586 __release_weak();
3587 }
3588#endif
3589 void __release_weak() _NOEXCEPT;
3590 _LIBCPP_INLINE_VISIBILITY
3591 long use_count() const _NOEXCEPT {return __shared_count::use_count();}
3592 __shared_weak_count* lock() _NOEXCEPT;
3593
3594 // Define the function out only if we build static libc++ without RTTI.
3595 // Otherwise we may break clients who need to compile their projects with
3596 // -fno-rtti and yet link against a libc++.dylib compiled
3597 // without -fno-rtti.
3598#if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC)
3599 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT;
3600#endif
3601private:
3602 virtual void __on_zero_shared_weak() _NOEXCEPT = 0;
3603};
3604
3605template <class _Tp, class _Dp, class _Alloc>
3606class __shared_ptr_pointer
3607 : public __shared_weak_count
3608{
3609 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_;
3610public:
3611 _LIBCPP_INLINE_VISIBILITY
3612 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a)
3613 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {}
3614
3615#ifndef _LIBCPP_NO_RTTI
3616 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT;
3617#endif
3618
3619private:
3620 virtual void __on_zero_shared() _NOEXCEPT;
3621 virtual void __on_zero_shared_weak() _NOEXCEPT;
3622};
3623
3624#ifndef _LIBCPP_NO_RTTI
3625
3626template <class _Tp, class _Dp, class _Alloc>
3627const void*
3628__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT
3629{
3630 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr;
3631}
3632
3633#endif // _LIBCPP_NO_RTTI
3634
3635template <class _Tp, class _Dp, class _Alloc>
3636void
3637__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT
3638{
3639 __data_.first().second()(__data_.first().first());
3640 __data_.first().second().~_Dp();
3641}
3642
3643template <class _Tp, class _Dp, class _Alloc>
3644void
3645__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT
3646{
3647 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al;
3648 typedef allocator_traits<_Al> _ATraits;
3649 typedef pointer_traits<typename _ATraits::pointer> _PTraits;
3650
3651 _Al __a(__data_.second());
3652 __data_.second().~_Alloc();
3653 __a.deallocate(_PTraits::pointer_to(*this), 1);
3654}
3655
3656template <class _Tp, class _Alloc>
3657class __shared_ptr_emplace
3658 : public __shared_weak_count
3659{
3660 __compressed_pair<_Alloc, _Tp> __data_;
3661public:
3662#ifndef _LIBCPP_HAS_NO_VARIADICS
3663
3664 _LIBCPP_INLINE_VISIBILITY
3665 __shared_ptr_emplace(_Alloc __a)
3666 : __data_(_VSTD::move(__a)) {}
3667
3668 template <class ..._Args>
3669 _LIBCPP_INLINE_VISIBILITY
3670 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args)
3671 : __data_(piecewise_construct, _VSTD::forward_as_tuple(__a),
3672 _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {}
3673
3674#else // _LIBCPP_HAS_NO_VARIADICS
3675
3676 _LIBCPP_INLINE_VISIBILITY
3677 __shared_ptr_emplace(_Alloc __a)
3678 : __data_(__a) {}
3679
3680 template <class _A0>
3681 _LIBCPP_INLINE_VISIBILITY
3682 __shared_ptr_emplace(_Alloc __a, _A0& __a0)
3683 : __data_(__a, _Tp(__a0)) {}
3684
3685 template <class _A0, class _A1>
3686 _LIBCPP_INLINE_VISIBILITY
3687 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1)
3688 : __data_(__a, _Tp(__a0, __a1)) {}
3689
3690 template <class _A0, class _A1, class _A2>
3691 _LIBCPP_INLINE_VISIBILITY
3692 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1, _A2& __a2)
3693 : __data_(__a, _Tp(__a0, __a1, __a2)) {}
3694
3695#endif // _LIBCPP_HAS_NO_VARIADICS
3696
3697private:
3698 virtual void __on_zero_shared() _NOEXCEPT;
3699 virtual void __on_zero_shared_weak() _NOEXCEPT;
3700public:
3701 _LIBCPP_INLINE_VISIBILITY
3702 _Tp* get() _NOEXCEPT {return _VSTD::addressof(__data_.second());}
3703};
3704
3705template <class _Tp, class _Alloc>
3706void
3707__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared() _NOEXCEPT
3708{
3709 __data_.second().~_Tp();
3710}
3711
3712template <class _Tp, class _Alloc>
3713void
3714__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT
3715{
3716 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type _Al;
3717 typedef allocator_traits<_Al> _ATraits;
3718 typedef pointer_traits<typename _ATraits::pointer> _PTraits;
3719 _Al __a(__data_.first());
3720 __data_.first().~_Alloc();
3721 __a.deallocate(_PTraits::pointer_to(*this), 1);
3722}
3723
3724struct __shared_ptr_dummy_rebind_allocator_type;
3725template <>
3726class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type>
3727{
3728public:
3729 template <class _Other>
3730 struct rebind
3731 {
3732 typedef allocator<_Other> other;
3733 };
3734};
3735
3736template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this;
3737
3738template<class _Tp>
3739class _LIBCPP_TEMPLATE_VIS shared_ptr
3740{
3741public:
3742 typedef _Tp element_type;
3743
3744#if _LIBCPP_STD_VER > 14
3745 typedef weak_ptr<_Tp> weak_type;
3746#endif
3747private:
3748 element_type* __ptr_;
3749 __shared_weak_count* __cntrl_;
3750
3751 struct __nat {int __for_bool_;};
3752public:
3753 _LIBCPP_INLINE_VISIBILITY
3754 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT;
3755 _LIBCPP_INLINE_VISIBILITY
3756 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT;
3757 template<class _Yp>
3758 explicit shared_ptr(_Yp* __p,
3759 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
3760 template<class _Yp, class _Dp>
3761 shared_ptr(_Yp* __p, _Dp __d,
3762 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
3763 template<class _Yp, class _Dp, class _Alloc>
3764 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a,
3765 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
3766 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d);
3767 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a);
3768 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT;
3769 _LIBCPP_INLINE_VISIBILITY
3770 shared_ptr(const shared_ptr& __r) _NOEXCEPT;
3771 template<class _Yp>
3772 _LIBCPP_INLINE_VISIBILITY
3773 shared_ptr(const shared_ptr<_Yp>& __r,
3774 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat())
3775 _NOEXCEPT;
3776#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
3777 _LIBCPP_INLINE_VISIBILITY
3778 shared_ptr(shared_ptr&& __r) _NOEXCEPT;
3779 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r,
3780 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat())
3781 _NOEXCEPT;
3782#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
3783 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r,
3784 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat());
3785#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
3786#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
3787 template<class _Yp>
3788 shared_ptr(auto_ptr<_Yp>&& __r,
3789 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
3790#else
3791 template<class _Yp>
3792 shared_ptr(auto_ptr<_Yp> __r,
3793 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat());
3794#endif
3795#endif
3796#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
3797 template <class _Yp, class _Dp>
3798 shared_ptr(unique_ptr<_Yp, _Dp>&&,
3799 typename enable_if
3800 <
3801 !is_lvalue_reference<_Dp>::value &&
3802 !is_array<_Yp>::value &&
3803 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
3804 __nat
3805 >::type = __nat());
3806 template <class _Yp, class _Dp>
3807 shared_ptr(unique_ptr<_Yp, _Dp>&&,
3808 typename enable_if
3809 <
3810 is_lvalue_reference<_Dp>::value &&
3811 !is_array<_Yp>::value &&
3812 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
3813 __nat
3814 >::type = __nat());
3815#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
3816 template <class _Yp, class _Dp>
3817 shared_ptr(unique_ptr<_Yp, _Dp>,
3818 typename enable_if
3819 <
3820 !is_lvalue_reference<_Dp>::value &&
3821 !is_array<_Yp>::value &&
3822 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
3823 __nat
3824 >::type = __nat());
3825 template <class _Yp, class _Dp>
3826 shared_ptr(unique_ptr<_Yp, _Dp>,
3827 typename enable_if
3828 <
3829 is_lvalue_reference<_Dp>::value &&
3830 !is_array<_Yp>::value &&
3831 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
3832 __nat
3833 >::type = __nat());
3834#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
3835
3836 ~shared_ptr();
3837
3838 _LIBCPP_INLINE_VISIBILITY
3839 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT;
3840 template<class _Yp>
3841 typename enable_if
3842 <
3843 is_convertible<_Yp*, element_type*>::value,
3844 shared_ptr&
3845 >::type
3846 _LIBCPP_INLINE_VISIBILITY
3847 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT;
3848#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
3849 _LIBCPP_INLINE_VISIBILITY
3850 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT;
3851 template<class _Yp>
3852 typename enable_if
3853 <
3854 is_convertible<_Yp*, element_type*>::value,
3855 shared_ptr<_Tp>&
3856 >::type
3857 _LIBCPP_INLINE_VISIBILITY
3858 operator=(shared_ptr<_Yp>&& __r);
3859#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
3860 template<class _Yp>
3861 _LIBCPP_INLINE_VISIBILITY
3862 typename enable_if
3863 <
3864 !is_array<_Yp>::value &&
3865 is_convertible<_Yp*, element_type*>::value,
3866 shared_ptr
3867 >::type&
3868 operator=(auto_ptr<_Yp>&& __r);
3869#endif
3870#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
3871#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
3872 template<class _Yp>
3873 _LIBCPP_INLINE_VISIBILITY
3874 typename enable_if
3875 <
3876 !is_array<_Yp>::value &&
3877 is_convertible<_Yp*, element_type*>::value,
3878 shared_ptr&
3879 >::type
3880 operator=(auto_ptr<_Yp> __r);
3881#endif
3882#endif
3883 template <class _Yp, class _Dp>
3884 typename enable_if
3885 <
3886 !is_array<_Yp>::value &&
3887 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
3888 shared_ptr&
3889 >::type
3890#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
3891 _LIBCPP_INLINE_VISIBILITY
3892 operator=(unique_ptr<_Yp, _Dp>&& __r);
3893#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
3894 _LIBCPP_INLINE_VISIBILITY
3895 operator=(unique_ptr<_Yp, _Dp> __r);
3896#endif
3897
3898 _LIBCPP_INLINE_VISIBILITY
3899 void swap(shared_ptr& __r) _NOEXCEPT;
3900 _LIBCPP_INLINE_VISIBILITY
3901 void reset() _NOEXCEPT;
3902 template<class _Yp>
3903 typename enable_if
3904 <
3905 is_convertible<_Yp*, element_type*>::value,
3906 void
3907 >::type
3908 _LIBCPP_INLINE_VISIBILITY
3909 reset(_Yp* __p);
3910 template<class _Yp, class _Dp>
3911 typename enable_if
3912 <
3913 is_convertible<_Yp*, element_type*>::value,
3914 void
3915 >::type
3916 _LIBCPP_INLINE_VISIBILITY
3917 reset(_Yp* __p, _Dp __d);
3918 template<class _Yp, class _Dp, class _Alloc>
3919 typename enable_if
3920 <
3921 is_convertible<_Yp*, element_type*>::value,
3922 void
3923 >::type
3924 _LIBCPP_INLINE_VISIBILITY
3925 reset(_Yp* __p, _Dp __d, _Alloc __a);
3926
3927 _LIBCPP_INLINE_VISIBILITY
3928 element_type* get() const _NOEXCEPT {return __ptr_;}
3929 _LIBCPP_INLINE_VISIBILITY
3930 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT
3931 {return *__ptr_;}
3932 _LIBCPP_INLINE_VISIBILITY
3933 element_type* operator->() const _NOEXCEPT {return __ptr_;}
3934 _LIBCPP_INLINE_VISIBILITY
3935 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;}
3936 _LIBCPP_INLINE_VISIBILITY
3937 bool unique() const _NOEXCEPT {return use_count() == 1;}
3938 _LIBCPP_INLINE_VISIBILITY
3939 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != 0;}
3940 template <class _Up>
3941 _LIBCPP_INLINE_VISIBILITY
3942 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT
3943 {return __cntrl_ < __p.__cntrl_;}
3944 template <class _Up>
3945 _LIBCPP_INLINE_VISIBILITY
3946 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT
3947 {return __cntrl_ < __p.__cntrl_;}
3948 _LIBCPP_INLINE_VISIBILITY
3949 bool
3950 __owner_equivalent(const shared_ptr& __p) const
3951 {return __cntrl_ == __p.__cntrl_;}
3952
3953#ifndef _LIBCPP_NO_RTTI
3954 template <class _Dp>
3955 _LIBCPP_INLINE_VISIBILITY
3956 _Dp* __get_deleter() const _NOEXCEPT
3957 {return static_cast<_Dp*>(__cntrl_
3958 ? const_cast<void *>(__cntrl_->__get_deleter(typeid(_Dp)))
3959 : nullptr);}
3960#endif // _LIBCPP_NO_RTTI
3961
3962#ifndef _LIBCPP_HAS_NO_VARIADICS
3963
3964 template<class ..._Args>
3965 static
3966 shared_ptr<_Tp>
3967 make_shared(_Args&& ...__args);
3968
3969 template<class _Alloc, class ..._Args>
3970 static
3971 shared_ptr<_Tp>
3972 allocate_shared(const _Alloc& __a, _Args&& ...__args);
3973
3974#else // _LIBCPP_HAS_NO_VARIADICS
3975
3976 static shared_ptr<_Tp> make_shared();
3977
3978 template<class _A0>
3979 static shared_ptr<_Tp> make_shared(_A0&);
3980
3981 template<class _A0, class _A1>
3982 static shared_ptr<_Tp> make_shared(_A0&, _A1&);
3983
3984 template<class _A0, class _A1, class _A2>
3985 static shared_ptr<_Tp> make_shared(_A0&, _A1&, _A2&);
3986
3987 template<class _Alloc>
3988 static shared_ptr<_Tp>
3989 allocate_shared(const _Alloc& __a);
3990
3991 template<class _Alloc, class _A0>
3992 static shared_ptr<_Tp>
3993 allocate_shared(const _Alloc& __a, _A0& __a0);
3994
3995 template<class _Alloc, class _A0, class _A1>
3996 static shared_ptr<_Tp>
3997 allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1);
3998
3999 template<class _Alloc, class _A0, class _A1, class _A2>
4000 static shared_ptr<_Tp>
4001 allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2);
4002
4003#endif // _LIBCPP_HAS_NO_VARIADICS
4004
4005private:
4006 template <class _Yp, bool = is_function<_Yp>::value>
4007 struct __shared_ptr_default_allocator
4008 {
4009 typedef allocator<_Yp> type;
4010 };
4011
4012 template <class _Yp>
4013 struct __shared_ptr_default_allocator<_Yp, true>
4014 {
4015 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type;
4016 };
4017
4018 template <class _Yp, class _OrigPtr>
4019 _LIBCPP_INLINE_VISIBILITY
4020 typename enable_if<is_convertible<_OrigPtr*,
4021 const enable_shared_from_this<_Yp>*
4022 >::value,
4023 void>::type
4024 __enable_weak_this(const enable_shared_from_this<_Yp>* __e,
4025 _OrigPtr* __ptr) _NOEXCEPT
4026 {
4027 typedef typename remove_cv<_Yp>::type _RawYp;
4028 if (__e && __e->__weak_this_.expired())
4029 {
4030 __e->__weak_this_ = shared_ptr<_RawYp>(*this,
4031 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr)));
4032 }
4033 }
4034
4035 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {}
4036
4037 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr;
4038 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr;
4039};
4040
4041
4042template<class _Tp>
4043inline
4044_LIBCPP_CONSTEXPR
4045shared_ptr<_Tp>::shared_ptr() _NOEXCEPT
4046 : __ptr_(0),
4047 __cntrl_(0)
4048{
4049}
4050
4051template<class _Tp>
4052inline
4053_LIBCPP_CONSTEXPR
4054shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT
4055 : __ptr_(0),
4056 __cntrl_(0)
4057{
4058}
4059
4060template<class _Tp>
4061template<class _Yp>
4062shared_ptr<_Tp>::shared_ptr(_Yp* __p,
4063 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
4064 : __ptr_(__p)
4065{
4066 unique_ptr<_Yp> __hold(__p);
4067 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
4068 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, _AllocT > _CntrlBlk;
4069 __cntrl_ = new _CntrlBlk(__p, default_delete<_Yp>(), _AllocT());
4070 __hold.release();
4071 __enable_weak_this(__p, __p);
4072}
4073
4074template<class _Tp>
4075template<class _Yp, class _Dp>
4076shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d,
4077 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
4078 : __ptr_(__p)
4079{
4080#ifndef _LIBCPP_NO_EXCEPTIONS
4081 try
4082 {
4083#endif // _LIBCPP_NO_EXCEPTIONS
4084 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
4085 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk;
4086 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT());
4087 __enable_weak_this(__p, __p);
4088#ifndef _LIBCPP_NO_EXCEPTIONS
4089 }
4090 catch (...)
4091 {
4092 __d(__p);
4093 throw;
4094 }
4095#endif // _LIBCPP_NO_EXCEPTIONS
4096}
4097
4098template<class _Tp>
4099template<class _Dp>
4100shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d)
4101 : __ptr_(0)
4102{
4103#ifndef _LIBCPP_NO_EXCEPTIONS
4104 try
4105 {
4106#endif // _LIBCPP_NO_EXCEPTIONS
4107 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT;
4108 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk;
4109 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT());
4110#ifndef _LIBCPP_NO_EXCEPTIONS
4111 }
4112 catch (...)
4113 {
4114 __d(__p);
4115 throw;
4116 }
4117#endif // _LIBCPP_NO_EXCEPTIONS
4118}
4119
4120template<class _Tp>
4121template<class _Yp, class _Dp, class _Alloc>
4122shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a,
4123 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
4124 : __ptr_(__p)
4125{
4126#ifndef _LIBCPP_NO_EXCEPTIONS
4127 try
4128 {
4129#endif // _LIBCPP_NO_EXCEPTIONS
4130 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk;
4131 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2;
4132 typedef __allocator_destructor<_A2> _D2;
4133 _A2 __a2(__a);
4134 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
4135 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
4136 _CntrlBlk(__p, __d, __a);
4137 __cntrl_ = _VSTD::addressof(*__hold2.release());
4138 __enable_weak_this(__p, __p);
4139#ifndef _LIBCPP_NO_EXCEPTIONS
4140 }
4141 catch (...)
4142 {
4143 __d(__p);
4144 throw;
4145 }
4146#endif // _LIBCPP_NO_EXCEPTIONS
4147}
4148
4149template<class _Tp>
4150template<class _Dp, class _Alloc>
4151shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a)
4152 : __ptr_(0)
4153{
4154#ifndef _LIBCPP_NO_EXCEPTIONS
4155 try
4156 {
4157#endif // _LIBCPP_NO_EXCEPTIONS
4158 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk;
4159 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2;
4160 typedef __allocator_destructor<_A2> _D2;
4161 _A2 __a2(__a);
4162 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
4163 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
4164 _CntrlBlk(__p, __d, __a);
4165 __cntrl_ = _VSTD::addressof(*__hold2.release());
4166#ifndef _LIBCPP_NO_EXCEPTIONS
4167 }
4168 catch (...)
4169 {
4170 __d(__p);
4171 throw;
4172 }
4173#endif // _LIBCPP_NO_EXCEPTIONS
4174}
4175
4176template<class _Tp>
4177template<class _Yp>
4178inline
4179shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT
4180 : __ptr_(__p),
4181 __cntrl_(__r.__cntrl_)
4182{
4183 if (__cntrl_)
4184 __cntrl_->__add_shared();
4185}
4186
4187template<class _Tp>
4188inline
4189shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT
4190 : __ptr_(__r.__ptr_),
4191 __cntrl_(__r.__cntrl_)
4192{
4193 if (__cntrl_)
4194 __cntrl_->__add_shared();
4195}
4196
4197template<class _Tp>
4198template<class _Yp>
4199inline
4200shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r,
4201 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
4202 _NOEXCEPT
4203 : __ptr_(__r.__ptr_),
4204 __cntrl_(__r.__cntrl_)
4205{
4206 if (__cntrl_)
4207 __cntrl_->__add_shared();
4208}
4209
4210#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
4211
4212template<class _Tp>
4213inline
4214shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT
4215 : __ptr_(__r.__ptr_),
4216 __cntrl_(__r.__cntrl_)
4217{
4218 __r.__ptr_ = 0;
4219 __r.__cntrl_ = 0;
4220}
4221
4222template<class _Tp>
4223template<class _Yp>
4224inline
4225shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r,
4226 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
4227 _NOEXCEPT
4228 : __ptr_(__r.__ptr_),
4229 __cntrl_(__r.__cntrl_)
4230{
4231 __r.__ptr_ = 0;
4232 __r.__cntrl_ = 0;
4233}
4234
4235#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
4236
4237#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
4238template<class _Tp>
4239template<class _Yp>
4240#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
4241shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r,
4242#else
4243shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp> __r,
4244#endif
4245 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
4246 : __ptr_(__r.get())
4247{
4248 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk;
4249 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>());
4250 __enable_weak_this(__r.get(), __r.get());
4251 __r.release();
4252}
4253#endif
4254
4255template<class _Tp>
4256template <class _Yp, class _Dp>
4257#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
4258shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r,
4259#else
4260shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r,
4261#endif
4262 typename enable_if
4263 <
4264 !is_lvalue_reference<_Dp>::value &&
4265 !is_array<_Yp>::value &&
4266 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
4267 __nat
4268 >::type)
4269 : __ptr_(__r.get())
4270{
4271#if _LIBCPP_STD_VER > 11
4272 if (__ptr_ == nullptr)
4273 __cntrl_ = nullptr;
4274 else
4275#endif
4276 {
4277 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
4278 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk;
4279 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT());
4280 __enable_weak_this(__r.get(), __r.get());
4281 }
4282 __r.release();
4283}
4284
4285template<class _Tp>
4286template <class _Yp, class _Dp>
4287#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
4288shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r,
4289#else
4290shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r,
4291#endif
4292 typename enable_if
4293 <
4294 is_lvalue_reference<_Dp>::value &&
4295 !is_array<_Yp>::value &&
4296 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value,
4297 __nat
4298 >::type)
4299 : __ptr_(__r.get())
4300{
4301#if _LIBCPP_STD_VER > 11
4302 if (__ptr_ == nullptr)
4303 __cntrl_ = nullptr;
4304 else
4305#endif
4306 {
4307 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT;
4308 typedef __shared_ptr_pointer<_Yp*,
4309 reference_wrapper<typename remove_reference<_Dp>::type>,
4310 _AllocT > _CntrlBlk;
4311 __cntrl_ = new _CntrlBlk(__r.get(), ref(__r.get_deleter()), _AllocT());
4312 __enable_weak_this(__r.get(), __r.get());
4313 }
4314 __r.release();
4315}
4316
4317#ifndef _LIBCPP_HAS_NO_VARIADICS
4318
4319template<class _Tp>
4320template<class ..._Args>
4321shared_ptr<_Tp>
4322shared_ptr<_Tp>::make_shared(_Args&& ...__args)
4323{
4324 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in make_shared" );
4325 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
4326 typedef allocator<_CntrlBlk> _A2;
4327 typedef __allocator_destructor<_A2> _D2;
4328 _A2 __a2;
4329 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
4330 ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...);
4331 shared_ptr<_Tp> __r;
4332 __r.__ptr_ = __hold2.get()->get();
4333 __r.__cntrl_ = __hold2.release();
4334 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4335 return __r;
4336}
4337
4338template<class _Tp>
4339template<class _Alloc, class ..._Args>
4340shared_ptr<_Tp>
4341shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _Args&& ...__args)
4342{
4343 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in allocate_shared" );
4344 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
4345 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2;
4346 typedef __allocator_destructor<_A2> _D2;
4347 _A2 __a2(__a);
4348 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1));
4349 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
4350 _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...);
4351 shared_ptr<_Tp> __r;
4352 __r.__ptr_ = __hold2.get()->get();
4353 __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
4354 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4355 return __r;
4356}
4357
4358#else // _LIBCPP_HAS_NO_VARIADICS
4359
4360template<class _Tp>
4361shared_ptr<_Tp>
4362shared_ptr<_Tp>::make_shared()
4363{
4364 static_assert((is_constructible<_Tp>::value), "Can't construct object in make_shared" );
4365 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
4366 typedef allocator<_CntrlBlk> _Alloc2;
4367 typedef __allocator_destructor<_Alloc2> _D2;
4368 _Alloc2 __alloc2;
4369 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
4370 ::new(__hold2.get()) _CntrlBlk(__alloc2);
4371 shared_ptr<_Tp> __r;
4372 __r.__ptr_ = __hold2.get()->get();
4373 __r.__cntrl_ = __hold2.release();
4374 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4375 return __r;
4376}
4377
4378template<class _Tp>
4379template<class _A0>
4380shared_ptr<_Tp>
4381shared_ptr<_Tp>::make_shared(_A0& __a0)
4382{
4383 static_assert((is_constructible<_Tp, _A0>::value), "Can't construct object in make_shared" );
4384 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
4385 typedef allocator<_CntrlBlk> _Alloc2;
4386 typedef __allocator_destructor<_Alloc2> _D2;
4387 _Alloc2 __alloc2;
4388 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
4389 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0);
4390 shared_ptr<_Tp> __r;
4391 __r.__ptr_ = __hold2.get()->get();
4392 __r.__cntrl_ = __hold2.release();
4393 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4394 return __r;
4395}
4396
4397template<class _Tp>
4398template<class _A0, class _A1>
4399shared_ptr<_Tp>
4400shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1)
4401{
4402 static_assert((is_constructible<_Tp, _A0, _A1>::value), "Can't construct object in make_shared" );
4403 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
4404 typedef allocator<_CntrlBlk> _Alloc2;
4405 typedef __allocator_destructor<_Alloc2> _D2;
4406 _Alloc2 __alloc2;
4407 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
4408 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1);
4409 shared_ptr<_Tp> __r;
4410 __r.__ptr_ = __hold2.get()->get();
4411 __r.__cntrl_ = __hold2.release();
4412 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4413 return __r;
4414}
4415
4416template<class _Tp>
4417template<class _A0, class _A1, class _A2>
4418shared_ptr<_Tp>
4419shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1, _A2& __a2)
4420{
4421 static_assert((is_constructible<_Tp, _A0, _A1, _A2>::value), "Can't construct object in make_shared" );
4422 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk;
4423 typedef allocator<_CntrlBlk> _Alloc2;
4424 typedef __allocator_destructor<_Alloc2> _D2;
4425 _Alloc2 __alloc2;
4426 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
4427 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1, __a2);
4428 shared_ptr<_Tp> __r;
4429 __r.__ptr_ = __hold2.get()->get();
4430 __r.__cntrl_ = __hold2.release();
4431 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4432 return __r;
4433}
4434
4435template<class _Tp>
4436template<class _Alloc>
4437shared_ptr<_Tp>
4438shared_ptr<_Tp>::allocate_shared(const _Alloc& __a)
4439{
4440 static_assert((is_constructible<_Tp>::value), "Can't construct object in allocate_shared" );
4441 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
4442 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2;
4443 typedef __allocator_destructor<_Alloc2> _D2;
4444 _Alloc2 __alloc2(__a);
4445 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
4446 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
4447 _CntrlBlk(__a);
4448 shared_ptr<_Tp> __r;
4449 __r.__ptr_ = __hold2.get()->get();
4450 __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
4451 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4452 return __r;
4453}
4454
4455template<class _Tp>
4456template<class _Alloc, class _A0>
4457shared_ptr<_Tp>
4458shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0)
4459{
4460 static_assert((is_constructible<_Tp, _A0>::value), "Can't construct object in allocate_shared" );
4461 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
4462 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2;
4463 typedef __allocator_destructor<_Alloc2> _D2;
4464 _Alloc2 __alloc2(__a);
4465 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
4466 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
4467 _CntrlBlk(__a, __a0);
4468 shared_ptr<_Tp> __r;
4469 __r.__ptr_ = __hold2.get()->get();
4470 __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
4471 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4472 return __r;
4473}
4474
4475template<class _Tp>
4476template<class _Alloc, class _A0, class _A1>
4477shared_ptr<_Tp>
4478shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1)
4479{
4480 static_assert((is_constructible<_Tp, _A0, _A1>::value), "Can't construct object in allocate_shared" );
4481 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
4482 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2;
4483 typedef __allocator_destructor<_Alloc2> _D2;
4484 _Alloc2 __alloc2(__a);
4485 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
4486 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
4487 _CntrlBlk(__a, __a0, __a1);
4488 shared_ptr<_Tp> __r;
4489 __r.__ptr_ = __hold2.get()->get();
4490 __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
4491 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4492 return __r;
4493}
4494
4495template<class _Tp>
4496template<class _Alloc, class _A0, class _A1, class _A2>
4497shared_ptr<_Tp>
4498shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2)
4499{
4500 static_assert((is_constructible<_Tp, _A0, _A1, _A2>::value), "Can't construct object in allocate_shared" );
4501 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk;
4502 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2;
4503 typedef __allocator_destructor<_Alloc2> _D2;
4504 _Alloc2 __alloc2(__a);
4505 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1));
4506 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get())))
4507 _CntrlBlk(__a, __a0, __a1, __a2);
4508 shared_ptr<_Tp> __r;
4509 __r.__ptr_ = __hold2.get()->get();
4510 __r.__cntrl_ = _VSTD::addressof(*__hold2.release());
4511 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_);
4512 return __r;
4513}
4514
4515#endif // _LIBCPP_HAS_NO_VARIADICS
4516
4517template<class _Tp>
4518shared_ptr<_Tp>::~shared_ptr()
4519{
4520 if (__cntrl_)
4521 __cntrl_->__release_shared();
4522}
4523
4524template<class _Tp>
4525inline
4526shared_ptr<_Tp>&
4527shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT
4528{
4529 shared_ptr(__r).swap(*this);
4530 return *this;
4531}
4532
4533template<class _Tp>
4534template<class _Yp>
4535inline
4536typename enable_if
4537<
4538 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
4539 shared_ptr<_Tp>&
4540>::type
4541shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT
4542{
4543 shared_ptr(__r).swap(*this);
4544 return *this;
4545}
4546
4547#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
4548
4549template<class _Tp>
4550inline
4551shared_ptr<_Tp>&
4552shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT
4553{
4554 shared_ptr(_VSTD::move(__r)).swap(*this);
4555 return *this;
4556}
4557
4558template<class _Tp>
4559template<class _Yp>
4560inline
4561typename enable_if
4562<
4563 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
4564 shared_ptr<_Tp>&
4565>::type
4566shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r)
4567{
4568 shared_ptr(_VSTD::move(__r)).swap(*this);
4569 return *this;
4570}
4571
4572#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
4573template<class _Tp>
4574template<class _Yp>
4575inline
4576typename enable_if
4577<
4578 !is_array<_Yp>::value &&
4579 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
4580 shared_ptr<_Tp>
4581>::type&
4582shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r)
4583{
4584 shared_ptr(_VSTD::move(__r)).swap(*this);
4585 return *this;
4586}
4587#endif
4588
4589template<class _Tp>
4590template <class _Yp, class _Dp>
4591inline
4592typename enable_if
4593<
4594 !is_array<_Yp>::value &&
4595 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer,
4596 typename shared_ptr<_Tp>::element_type*>::value,
4597 shared_ptr<_Tp>&
4598>::type
4599shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r)
4600{
4601 shared_ptr(_VSTD::move(__r)).swap(*this);
4602 return *this;
4603}
4604
4605#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
4606
4607#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
4608template<class _Tp>
4609template<class _Yp>
4610inline _LIBCPP_INLINE_VISIBILITY
4611typename enable_if
4612<
4613 !is_array<_Yp>::value &&
4614 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
4615 shared_ptr<_Tp>&
4616>::type
4617shared_ptr<_Tp>::operator=(auto_ptr<_Yp> __r)
4618{
4619 shared_ptr(__r).swap(*this);
4620 return *this;
4621}
4622#endif
4623
4624template<class _Tp>
4625template <class _Yp, class _Dp>
4626inline _LIBCPP_INLINE_VISIBILITY
4627typename enable_if
4628<
4629 !is_array<_Yp>::value &&
4630 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer,
4631 typename shared_ptr<_Tp>::element_type*>::value,
4632 shared_ptr<_Tp>&
4633>::type
4634shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp> __r)
4635{
4636 shared_ptr(_VSTD::move(__r)).swap(*this);
4637 return *this;
4638}
4639
4640#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
4641
4642template<class _Tp>
4643inline
4644void
4645shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT
4646{
4647 _VSTD::swap(__ptr_, __r.__ptr_);
4648 _VSTD::swap(__cntrl_, __r.__cntrl_);
4649}
4650
4651template<class _Tp>
4652inline
4653void
4654shared_ptr<_Tp>::reset() _NOEXCEPT
4655{
4656 shared_ptr().swap(*this);
4657}
4658
4659template<class _Tp>
4660template<class _Yp>
4661inline
4662typename enable_if
4663<
4664 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
4665 void
4666>::type
4667shared_ptr<_Tp>::reset(_Yp* __p)
4668{
4669 shared_ptr(__p).swap(*this);
4670}
4671
4672template<class _Tp>
4673template<class _Yp, class _Dp>
4674inline
4675typename enable_if
4676<
4677 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
4678 void
4679>::type
4680shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d)
4681{
4682 shared_ptr(__p, __d).swap(*this);
4683}
4684
4685template<class _Tp>
4686template<class _Yp, class _Dp, class _Alloc>
4687inline
4688typename enable_if
4689<
4690 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value,
4691 void
4692>::type
4693shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a)
4694{
4695 shared_ptr(__p, __d, __a).swap(*this);
4696}
4697
4698#ifndef _LIBCPP_HAS_NO_VARIADICS
4699
4700template<class _Tp, class ..._Args>
4701inline _LIBCPP_INLINE_VISIBILITY
4702typename enable_if
4703<
4704 !is_array<_Tp>::value,
4705 shared_ptr<_Tp>
4706>::type
4707make_shared(_Args&& ...__args)
4708{
4709 return shared_ptr<_Tp>::make_shared(_VSTD::forward<_Args>(__args)...);
4710}
4711
4712template<class _Tp, class _Alloc, class ..._Args>
4713inline _LIBCPP_INLINE_VISIBILITY
4714typename enable_if
4715<
4716 !is_array<_Tp>::value,
4717 shared_ptr<_Tp>
4718>::type
4719allocate_shared(const _Alloc& __a, _Args&& ...__args)
4720{
4721 return shared_ptr<_Tp>::allocate_shared(__a, _VSTD::forward<_Args>(__args)...);
4722}
4723
4724#else // _LIBCPP_HAS_NO_VARIADICS
4725
4726template<class _Tp>
4727inline _LIBCPP_INLINE_VISIBILITY
4728shared_ptr<_Tp>
4729make_shared()
4730{
4731 return shared_ptr<_Tp>::make_shared();
4732}
4733
4734template<class _Tp, class _A0>
4735inline _LIBCPP_INLINE_VISIBILITY
4736shared_ptr<_Tp>
4737make_shared(_A0& __a0)
4738{
4739 return shared_ptr<_Tp>::make_shared(__a0);
4740}
4741
4742template<class _Tp, class _A0, class _A1>
4743inline _LIBCPP_INLINE_VISIBILITY
4744shared_ptr<_Tp>
4745make_shared(_A0& __a0, _A1& __a1)
4746{
4747 return shared_ptr<_Tp>::make_shared(__a0, __a1);
4748}
4749
4750template<class _Tp, class _A0, class _A1, class _A2>
4751inline _LIBCPP_INLINE_VISIBILITY
4752shared_ptr<_Tp>
4753make_shared(_A0& __a0, _A1& __a1, _A2& __a2)
4754{
4755 return shared_ptr<_Tp>::make_shared(__a0, __a1, __a2);
4756}
4757
4758template<class _Tp, class _Alloc>
4759inline _LIBCPP_INLINE_VISIBILITY
4760shared_ptr<_Tp>
4761allocate_shared(const _Alloc& __a)
4762{
4763 return shared_ptr<_Tp>::allocate_shared(__a);
4764}
4765
4766template<class _Tp, class _Alloc, class _A0>
4767inline _LIBCPP_INLINE_VISIBILITY
4768shared_ptr<_Tp>
4769allocate_shared(const _Alloc& __a, _A0& __a0)
4770{
4771 return shared_ptr<_Tp>::allocate_shared(__a, __a0);
4772}
4773
4774template<class _Tp, class _Alloc, class _A0, class _A1>
4775inline _LIBCPP_INLINE_VISIBILITY
4776shared_ptr<_Tp>
4777allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1)
4778{
4779 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1);
4780}
4781
4782template<class _Tp, class _Alloc, class _A0, class _A1, class _A2>
4783inline _LIBCPP_INLINE_VISIBILITY
4784shared_ptr<_Tp>
4785allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2)
4786{
4787 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1, __a2);
4788}
4789
4790#endif // _LIBCPP_HAS_NO_VARIADICS
4791
4792template<class _Tp, class _Up>
4793inline _LIBCPP_INLINE_VISIBILITY
4794bool
4795operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT
4796{
4797 return __x.get() == __y.get();
4798}
4799
4800template<class _Tp, class _Up>
4801inline _LIBCPP_INLINE_VISIBILITY
4802bool
4803operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT
4804{
4805 return !(__x == __y);
4806}
4807
4808template<class _Tp, class _Up>
4809inline _LIBCPP_INLINE_VISIBILITY
4810bool
4811operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT
4812{
4813#if _LIBCPP_STD_VER <= 11
4814 typedef typename common_type<_Tp*, _Up*>::type _Vp;
4815 return less<_Vp>()(__x.get(), __y.get());
4816#else
4817 return less<>()(__x.get(), __y.get());
4818#endif
4819
4820}
4821
4822template<class _Tp, class _Up>
4823inline _LIBCPP_INLINE_VISIBILITY
4824bool
4825operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT
4826{
4827 return __y < __x;
4828}
4829
4830template<class _Tp, class _Up>
4831inline _LIBCPP_INLINE_VISIBILITY
4832bool
4833operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT
4834{
4835 return !(__y < __x);
4836}
4837
4838template<class _Tp, class _Up>
4839inline _LIBCPP_INLINE_VISIBILITY
4840bool
4841operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT
4842{
4843 return !(__x < __y);
4844}
4845
4846template<class _Tp>
4847inline _LIBCPP_INLINE_VISIBILITY
4848bool
4849operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT
4850{
4851 return !__x;
4852}
4853
4854template<class _Tp>
4855inline _LIBCPP_INLINE_VISIBILITY
4856bool
4857operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT
4858{
4859 return !__x;
4860}
4861
4862template<class _Tp>
4863inline _LIBCPP_INLINE_VISIBILITY
4864bool
4865operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT
4866{
4867 return static_cast<bool>(__x);
4868}
4869
4870template<class _Tp>
4871inline _LIBCPP_INLINE_VISIBILITY
4872bool
4873operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT
4874{
4875 return static_cast<bool>(__x);
4876}
4877
4878template<class _Tp>
4879inline _LIBCPP_INLINE_VISIBILITY
4880bool
4881operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT
4882{
4883 return less<_Tp*>()(__x.get(), nullptr);
4884}
4885
4886template<class _Tp>
4887inline _LIBCPP_INLINE_VISIBILITY
4888bool
4889operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT
4890{
4891 return less<_Tp*>()(nullptr, __x.get());
4892}
4893
4894template<class _Tp>
4895inline _LIBCPP_INLINE_VISIBILITY
4896bool
4897operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT
4898{
4899 return nullptr < __x;
4900}
4901
4902template<class _Tp>
4903inline _LIBCPP_INLINE_VISIBILITY
4904bool
4905operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT
4906{
4907 return __x < nullptr;
4908}
4909
4910template<class _Tp>
4911inline _LIBCPP_INLINE_VISIBILITY
4912bool
4913operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT
4914{
4915 return !(nullptr < __x);
4916}
4917
4918template<class _Tp>
4919inline _LIBCPP_INLINE_VISIBILITY
4920bool
4921operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT
4922{
4923 return !(__x < nullptr);
4924}
4925
4926template<class _Tp>
4927inline _LIBCPP_INLINE_VISIBILITY
4928bool
4929operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT
4930{
4931 return !(__x < nullptr);
4932}
4933
4934template<class _Tp>
4935inline _LIBCPP_INLINE_VISIBILITY
4936bool
4937operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT
4938{
4939 return !(nullptr < __x);
4940}
4941
4942template<class _Tp>
4943inline _LIBCPP_INLINE_VISIBILITY
4944void
4945swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT
4946{
4947 __x.swap(__y);
4948}
4949
4950template<class _Tp, class _Up>
4951inline _LIBCPP_INLINE_VISIBILITY
4952typename enable_if
4953<
4954 !is_array<_Tp>::value && !is_array<_Up>::value,
4955 shared_ptr<_Tp>
4956>::type
4957static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT
4958{
4959 return shared_ptr<_Tp>(__r, static_cast<_Tp*>(__r.get()));
4960}
4961
4962template<class _Tp, class _Up>
4963inline _LIBCPP_INLINE_VISIBILITY
4964typename enable_if
4965<
4966 !is_array<_Tp>::value && !is_array<_Up>::value,
4967 shared_ptr<_Tp>
4968>::type
4969dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT
4970{
4971 _Tp* __p = dynamic_cast<_Tp*>(__r.get());
4972 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>();
4973}
4974
4975template<class _Tp, class _Up>
4976typename enable_if
4977<
4978 is_array<_Tp>::value == is_array<_Up>::value,
4979 shared_ptr<_Tp>
4980>::type
4981const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT
4982{
4983 typedef typename remove_extent<_Tp>::type _RTp;
4984 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get()));
4985}
4986
4987#ifndef _LIBCPP_NO_RTTI
4988
4989template<class _Dp, class _Tp>
4990inline _LIBCPP_INLINE_VISIBILITY
4991_Dp*
4992get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT
4993{
4994 return __p.template __get_deleter<_Dp>();
4995}
4996
4997#endif // _LIBCPP_NO_RTTI
4998
4999template<class _Tp>
5000class _LIBCPP_TEMPLATE_VIS weak_ptr
5001{
5002public:
5003 typedef _Tp element_type;
5004private:
5005 element_type* __ptr_;
5006 __shared_weak_count* __cntrl_;
5007
5008public:
5009 _LIBCPP_INLINE_VISIBILITY
5010 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT;
5011 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r,
5012 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0)
5013 _NOEXCEPT;
5014 _LIBCPP_INLINE_VISIBILITY
5015 weak_ptr(weak_ptr const& __r) _NOEXCEPT;
5016 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r,
5017 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0)
5018 _NOEXCEPT;
5019
5020#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
5021 _LIBCPP_INLINE_VISIBILITY
5022 weak_ptr(weak_ptr&& __r) _NOEXCEPT;
5023 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r,
5024 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0)
5025 _NOEXCEPT;
5026#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
5027 ~weak_ptr();
5028
5029 _LIBCPP_INLINE_VISIBILITY
5030 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT;
5031 template<class _Yp>
5032 typename enable_if
5033 <
5034 is_convertible<_Yp*, element_type*>::value,
5035 weak_ptr&
5036 >::type
5037 _LIBCPP_INLINE_VISIBILITY
5038 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT;
5039
5040#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
5041
5042 _LIBCPP_INLINE_VISIBILITY
5043 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT;
5044 template<class _Yp>
5045 typename enable_if
5046 <
5047 is_convertible<_Yp*, element_type*>::value,
5048 weak_ptr&
5049 >::type
5050 _LIBCPP_INLINE_VISIBILITY
5051 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT;
5052
5053#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
5054
5055 template<class _Yp>
5056 typename enable_if
5057 <
5058 is_convertible<_Yp*, element_type*>::value,
5059 weak_ptr&
5060 >::type
5061 _LIBCPP_INLINE_VISIBILITY
5062 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT;
5063
5064 _LIBCPP_INLINE_VISIBILITY
5065 void swap(weak_ptr& __r) _NOEXCEPT;
5066 _LIBCPP_INLINE_VISIBILITY
5067 void reset() _NOEXCEPT;
5068
5069 _LIBCPP_INLINE_VISIBILITY
5070 long use_count() const _NOEXCEPT
5071 {return __cntrl_ ? __cntrl_->use_count() : 0;}
5072 _LIBCPP_INLINE_VISIBILITY
5073 bool expired() const _NOEXCEPT
5074 {return __cntrl_ == 0 || __cntrl_->use_count() == 0;}
5075 shared_ptr<_Tp> lock() const _NOEXCEPT;
5076 template<class _Up>
5077 _LIBCPP_INLINE_VISIBILITY
5078 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT
5079 {return __cntrl_ < __r.__cntrl_;}
5080 template<class _Up>
5081 _LIBCPP_INLINE_VISIBILITY
5082 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT
5083 {return __cntrl_ < __r.__cntrl_;}
5084
5085 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr;
5086 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr;
5087};
5088
5089template<class _Tp>
5090inline
5091_LIBCPP_CONSTEXPR
5092weak_ptr<_Tp>::weak_ptr() _NOEXCEPT
5093 : __ptr_(0),
5094 __cntrl_(0)
5095{
5096}
5097
5098template<class _Tp>
5099inline
5100weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT
5101 : __ptr_(__r.__ptr_),
5102 __cntrl_(__r.__cntrl_)
5103{
5104 if (__cntrl_)
5105 __cntrl_->__add_weak();
5106}
5107
5108template<class _Tp>
5109template<class _Yp>
5110inline
5111weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r,
5112 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type)
5113 _NOEXCEPT
5114 : __ptr_(__r.__ptr_),
5115 __cntrl_(__r.__cntrl_)
5116{
5117 if (__cntrl_)
5118 __cntrl_->__add_weak();
5119}
5120
5121template<class _Tp>
5122template<class _Yp>
5123inline
5124weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r,
5125 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type)
5126 _NOEXCEPT
5127 : __ptr_(__r.__ptr_),
5128 __cntrl_(__r.__cntrl_)
5129{
5130 if (__cntrl_)
5131 __cntrl_->__add_weak();
5132}
5133
5134#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
5135
5136template<class _Tp>
5137inline
5138weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT
5139 : __ptr_(__r.__ptr_),
5140 __cntrl_(__r.__cntrl_)
5141{
5142 __r.__ptr_ = 0;
5143 __r.__cntrl_ = 0;
5144}
5145
5146template<class _Tp>
5147template<class _Yp>
5148inline
5149weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r,
5150 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type)
5151 _NOEXCEPT
5152 : __ptr_(__r.__ptr_),
5153 __cntrl_(__r.__cntrl_)
5154{
5155 __r.__ptr_ = 0;
5156 __r.__cntrl_ = 0;
5157}
5158
5159#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
5160
5161template<class _Tp>
5162weak_ptr<_Tp>::~weak_ptr()
5163{
5164 if (__cntrl_)
5165 __cntrl_->__release_weak();
5166}
5167
5168template<class _Tp>
5169inline
5170weak_ptr<_Tp>&
5171weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT
5172{
5173 weak_ptr(__r).swap(*this);
5174 return *this;
5175}
5176
5177template<class _Tp>
5178template<class _Yp>
5179inline
5180typename enable_if
5181<
5182 is_convertible<_Yp*, _Tp*>::value,
5183 weak_ptr<_Tp>&
5184>::type
5185weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT
5186{
5187 weak_ptr(__r).swap(*this);
5188 return *this;
5189}
5190
5191#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
5192
5193template<class _Tp>
5194inline
5195weak_ptr<_Tp>&
5196weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT
5197{
5198 weak_ptr(_VSTD::move(__r)).swap(*this);
5199 return *this;
5200}
5201
5202template<class _Tp>
5203template<class _Yp>
5204inline
5205typename enable_if
5206<
5207 is_convertible<_Yp*, _Tp*>::value,
5208 weak_ptr<_Tp>&
5209>::type
5210weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT
5211{
5212 weak_ptr(_VSTD::move(__r)).swap(*this);
5213 return *this;
5214}
5215
5216#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
5217
5218template<class _Tp>
5219template<class _Yp>
5220inline
5221typename enable_if
5222<
5223 is_convertible<_Yp*, _Tp*>::value,
5224 weak_ptr<_Tp>&
5225>::type
5226weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT
5227{
5228 weak_ptr(__r).swap(*this);
5229 return *this;
5230}
5231
5232template<class _Tp>
5233inline
5234void
5235weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT
5236{
5237 _VSTD::swap(__ptr_, __r.__ptr_);
5238 _VSTD::swap(__cntrl_, __r.__cntrl_);
5239}
5240
5241template<class _Tp>
5242inline _LIBCPP_INLINE_VISIBILITY
5243void
5244swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT
5245{
5246 __x.swap(__y);
5247}
5248
5249template<class _Tp>
5250inline
5251void
5252weak_ptr<_Tp>::reset() _NOEXCEPT
5253{
5254 weak_ptr().swap(*this);
5255}
5256
5257template<class _Tp>
5258template<class _Yp>
5259shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r,
5260 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type)
5261 : __ptr_(__r.__ptr_),
5262 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_)
5263{
5264 if (__cntrl_ == 0)
5265 __throw_bad_weak_ptr();
5266}
5267
5268template<class _Tp>
5269shared_ptr<_Tp>
5270weak_ptr<_Tp>::lock() const _NOEXCEPT
5271{
5272 shared_ptr<_Tp> __r;
5273 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_;
5274 if (__r.__cntrl_)
5275 __r.__ptr_ = __ptr_;
5276 return __r;
5277}
5278
5279#if _LIBCPP_STD_VER > 14
5280template <class _Tp = void> struct owner_less;
5281#else
5282template <class _Tp> struct owner_less;
5283#endif
5284
5285template <class _Tp>
5286struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> >
5287 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool>
5288{
5289 typedef bool result_type;
5290 _LIBCPP_INLINE_VISIBILITY
5291 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT
5292 {return __x.owner_before(__y);}
5293 _LIBCPP_INLINE_VISIBILITY
5294 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT
5295 {return __x.owner_before(__y);}
5296 _LIBCPP_INLINE_VISIBILITY
5297 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT
5298 {return __x.owner_before(__y);}
5299};
5300
5301template <class _Tp>
5302struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> >
5303 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool>
5304{
5305 typedef bool result_type;
5306 _LIBCPP_INLINE_VISIBILITY
5307 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT
5308 {return __x.owner_before(__y);}
5309 _LIBCPP_INLINE_VISIBILITY
5310 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT
5311 {return __x.owner_before(__y);}
5312 _LIBCPP_INLINE_VISIBILITY
5313 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT
5314 {return __x.owner_before(__y);}
5315};
5316
5317#if _LIBCPP_STD_VER > 14
5318template <>
5319struct _LIBCPP_TEMPLATE_VIS owner_less<void>
5320{
5321 template <class _Tp, class _Up>
5322 _LIBCPP_INLINE_VISIBILITY
5323 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT
5324 {return __x.owner_before(__y);}
5325 template <class _Tp, class _Up>
5326 _LIBCPP_INLINE_VISIBILITY
5327 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT
5328 {return __x.owner_before(__y);}
5329 template <class _Tp, class _Up>
5330 _LIBCPP_INLINE_VISIBILITY
5331 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT
5332 {return __x.owner_before(__y);}
5333 template <class _Tp, class _Up>
5334 _LIBCPP_INLINE_VISIBILITY
5335 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT
5336 {return __x.owner_before(__y);}
5337 typedef void is_transparent;
5338};
5339#endif
5340
5341template<class _Tp>
5342class _LIBCPP_TEMPLATE_VIS enable_shared_from_this
5343{
5344 mutable weak_ptr<_Tp> __weak_this_;
5345protected:
5346 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR
5347 enable_shared_from_this() _NOEXCEPT {}
5348 _LIBCPP_INLINE_VISIBILITY
5349 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {}
5350 _LIBCPP_INLINE_VISIBILITY
5351 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT
5352 {return *this;}
5353 _LIBCPP_INLINE_VISIBILITY
5354 ~enable_shared_from_this() {}
5355public:
5356 _LIBCPP_INLINE_VISIBILITY
5357 shared_ptr<_Tp> shared_from_this()
5358 {return shared_ptr<_Tp>(__weak_this_);}
5359 _LIBCPP_INLINE_VISIBILITY
5360 shared_ptr<_Tp const> shared_from_this() const
5361 {return shared_ptr<const _Tp>(__weak_this_);}
5362
5363#if _LIBCPP_STD_VER > 14
5364 _LIBCPP_INLINE_VISIBILITY
5365 weak_ptr<_Tp> weak_from_this() _NOEXCEPT
5366 { return __weak_this_; }
5367
5368 _LIBCPP_INLINE_VISIBILITY
5369 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT
5370 { return __weak_this_; }
5371#endif // _LIBCPP_STD_VER > 14
5372
5373 template <class _Up> friend class shared_ptr;
5374};
5375
5376template <class _Tp>
5377struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> >
5378{
5379 typedef shared_ptr<_Tp> argument_type;
5380 typedef size_t result_type;
5381
5382 _LIBCPP_INLINE_VISIBILITY
5383 result_type operator()(const argument_type& __ptr) const _NOEXCEPT
5384 {
5385 return hash<_Tp*>()(__ptr.get());
5386 }
5387};
5388
5389template<class _CharT, class _Traits, class _Yp>
5390inline _LIBCPP_INLINE_VISIBILITY
5391basic_ostream<_CharT, _Traits>&
5392operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p);
5393
5394
5395#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER)
5396
5397class _LIBCPP_TYPE_VIS __sp_mut
5398{
5399 void* __lx;
5400public:
5401 void lock() _NOEXCEPT;
5402 void unlock() _NOEXCEPT;
5403
5404private:
5405 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT;
5406 __sp_mut(const __sp_mut&);
5407 __sp_mut& operator=(const __sp_mut&);
5408
5409 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*);
5410};
5411
5412_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5413__sp_mut& __get_sp_mut(const void*);
5414
5415template <class _Tp>
5416inline _LIBCPP_INLINE_VISIBILITY
5417bool
5418atomic_is_lock_free(const shared_ptr<_Tp>*)
5419{
5420 return false;
5421}
5422
5423template <class _Tp>
5424_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5425shared_ptr<_Tp>
5426atomic_load(const shared_ptr<_Tp>* __p)
5427{
5428 __sp_mut& __m = __get_sp_mut(__p);
5429 __m.lock();
5430 shared_ptr<_Tp> __q = *__p;
5431 __m.unlock();
5432 return __q;
5433}
5434
5435template <class _Tp>
5436inline _LIBCPP_INLINE_VISIBILITY
5437_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5438shared_ptr<_Tp>
5439atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order)
5440{
5441 return atomic_load(__p);
5442}
5443
5444template <class _Tp>
5445_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5446void
5447atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r)
5448{
5449 __sp_mut& __m = __get_sp_mut(__p);
5450 __m.lock();
5451 __p->swap(__r);
5452 __m.unlock();
5453}
5454
5455template <class _Tp>
5456inline _LIBCPP_INLINE_VISIBILITY
5457_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5458void
5459atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order)
5460{
5461 atomic_store(__p, __r);
5462}
5463
5464template <class _Tp>
5465_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5466shared_ptr<_Tp>
5467atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r)
5468{
5469 __sp_mut& __m = __get_sp_mut(__p);
5470 __m.lock();
5471 __p->swap(__r);
5472 __m.unlock();
5473 return __r;
5474}
5475
5476template <class _Tp>
5477inline _LIBCPP_INLINE_VISIBILITY
5478_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5479shared_ptr<_Tp>
5480atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order)
5481{
5482 return atomic_exchange(__p, __r);
5483}
5484
5485template <class _Tp>
5486_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5487bool
5488atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w)
5489{
5490 shared_ptr<_Tp> __temp;
5491 __sp_mut& __m = __get_sp_mut(__p);
5492 __m.lock();
5493 if (__p->__owner_equivalent(*__v))
5494 {
5495 _VSTD::swap(__temp, *__p);
5496 *__p = __w;
5497 __m.unlock();
5498 return true;
5499 }
5500 _VSTD::swap(__temp, *__v);
5501 *__v = *__p;
5502 __m.unlock();
5503 return false;
5504}
5505
5506template <class _Tp>
5507inline _LIBCPP_INLINE_VISIBILITY
5508_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5509bool
5510atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w)
5511{
5512 return atomic_compare_exchange_strong(__p, __v, __w);
5513}
5514
5515template <class _Tp>
5516inline _LIBCPP_INLINE_VISIBILITY
5517_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5518bool
5519atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v,
5520 shared_ptr<_Tp> __w, memory_order, memory_order)
5521{
5522 return atomic_compare_exchange_strong(__p, __v, __w);
5523}
5524
5525template <class _Tp>
5526inline _LIBCPP_INLINE_VISIBILITY
5527_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
5528bool
5529atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v,
5530 shared_ptr<_Tp> __w, memory_order, memory_order)
5531{
5532 return atomic_compare_exchange_weak(__p, __v, __w);
5533}
5534
5535#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER)
5536
5537//enum class
5538#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE)
5539# ifndef _LIBCPP_CXX03_LANG
5540enum class pointer_safety : unsigned char {
5541 relaxed,
5542 preferred,
5543 strict
5544};
5545# endif
5546#else
5547struct _LIBCPP_TYPE_VIS pointer_safety
5548{
5549 enum __lx
5550 {
5551 relaxed,
5552 preferred,
5553 strict
5554 };
5555
5556 __lx __v_;
5557
5558 _LIBCPP_INLINE_VISIBILITY
5559 pointer_safety() : __v_() {}
5560
5561 _LIBCPP_INLINE_VISIBILITY
5562 pointer_safety(__lx __v) : __v_(__v) {}
5563 _LIBCPP_INLINE_VISIBILITY
5564 operator int() const {return __v_;}
5565};
5566#endif
5567
5568#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \
5569 defined(_LIBCPP_BUILDING_LIBRARY)
5570_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT;
5571#else
5572// This function is only offered in C++03 under ABI v1.
5573# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG)
5574inline _LIBCPP_INLINE_VISIBILITY
5575pointer_safety get_pointer_safety() _NOEXCEPT {
5576 return pointer_safety::relaxed;
5577}
5578# endif
5579#endif
5580
5581
5582_LIBCPP_FUNC_VIS void declare_reachable(void* __p);
5583_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n);
5584_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n);
5585_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p);
5586
5587template <class _Tp>
5588inline _LIBCPP_INLINE_VISIBILITY
5589_Tp*
5590undeclare_reachable(_Tp* __p)
5591{
5592 return static_cast<_Tp*>(__undeclare_reachable(__p));
5593}
5594
5595_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space);
5596
5597// --- Helper for container swap --
5598template <typename _Alloc>
5599inline _LIBCPP_INLINE_VISIBILITY
5600void __swap_allocator(_Alloc & __a1, _Alloc & __a2)
5601#if _LIBCPP_STD_VER >= 14
5602 _NOEXCEPT
5603#else
5604 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value)
5605#endif
5606{
5607 __swap_allocator(__a1, __a2,
5608 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>());
5609}
5610
5611template <typename _Alloc>
5612_LIBCPP_INLINE_VISIBILITY
5613void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type)
5614#if _LIBCPP_STD_VER >= 14
5615 _NOEXCEPT
5616#else
5617 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value)
5618#endif
5619{
5620 using _VSTD::swap;
5621 swap(__a1, __a2);
5622}
5623
5624template <typename _Alloc>
5625inline _LIBCPP_INLINE_VISIBILITY
5626void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {}
5627
5628template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> >
5629struct __noexcept_move_assign_container : public integral_constant<bool,
5630 _Traits::propagate_on_container_move_assignment::value
5631#if _LIBCPP_STD_VER > 14
5632 || _Traits::is_always_equal::value
5633#else
5634 && is_nothrow_move_assignable<_Alloc>::value
5635#endif
5636 > {};
5637
5638
5639#ifndef _LIBCPP_HAS_NO_VARIADICS
5640template <class _Tp, class _Alloc>
5641struct __temp_value {
5642 typedef allocator_traits<_Alloc> _Traits;
5643
5644 typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v;
5645 _Alloc &__a;
5646
5647 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); }
5648 _Tp & get() { return *__addr(); }
5649
5650 template<class... _Args>
5651 _LIBCPP_NO_CFI
5652 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) {
5653 _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)),
5654 _VSTD::forward<_Args>(__args)...);
5655 }
5656
5657 ~__temp_value() { _Traits::destroy(__a, __addr()); }
5658 };
5659#endif
5660
5661template<typename _Alloc, typename = void, typename = void>
5662struct __is_allocator : false_type {};
5663
5664template<typename _Alloc>
5665struct __is_allocator<_Alloc,
5666 typename __void_t<typename _Alloc::value_type>::type,
5667 typename __void_t<decltype(_VSTD::declval<_Alloc&>().allocate(size_t(0)))>::type
5668 >
5669 : true_type {};
5670
5671_LIBCPP_END_NAMESPACE_STD
5672
5673_LIBCPP_POP_MACROS
5674
5675#endif // _LIBCPP_MEMORY
5676