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<T>::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> // deprecated in C++17, removed in C++20 105{ 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; // deprecated in C++17, removed in C++20 119 typedef ptrdiff_t difference_type; // deprecated in C++17, removed in C++20 120 typedef T* pointer; // deprecated in C++17, removed in C++20 121 typedef const T* const_pointer; // deprecated in C++17, removed in C++20 122 typedef typename add_lvalue_reference<T>::type 123 reference; // deprecated in C++17, removed in C++20 124 typedef typename add_lvalue_reference<const T>::type 125 const_reference; // deprecated in C++17, removed in C++20 126 127 typedef T value_type; 128 129 template <class U> struct rebind {typedef allocator<U> other;}; // deprecated in C++17, removed in C++20 130 131 typedef true_type propagate_on_container_move_assignment; 132 typedef true_type is_always_equal; 133 134 constexpr allocator() noexcept; // constexpr in C++20 135 constexpr allocator(const allocator&) noexcept; // constexpr in C++20 136 template <class U> 137 constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20 138 ~allocator(); 139 pointer address(reference x) const noexcept; // deprecated in C++17, removed in C++20 140 const_pointer address(const_reference x) const noexcept; // deprecated in C++17, removed in C++20 141 T* allocate(size_t n, const void* hint); // deprecated in C++17, removed in C++20 142 T* allocate(size_t n); 143 void deallocate(T* p, size_t n) noexcept; 144 size_type max_size() const noexcept; // deprecated in C++17, removed in C++20 145 template<class U, class... Args> 146 void construct(U* p, Args&&... args); // deprecated in C++17, removed in C++20 147 template <class U> 148 void destroy(U* p); // deprecated in C++17, removed in C++20 149}; 150 151template <class T, class U> 152bool operator==(const allocator<T>&, const allocator<U>&) noexcept; 153 154template <class T, class U> 155bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; 156 157template <class OutputIterator, class T> 158class raw_storage_iterator 159 : public iterator<output_iterator_tag, 160 T, // purposefully not C++03 161 ptrdiff_t, // purposefully not C++03 162 T*, // purposefully not C++03 163 raw_storage_iterator&> // purposefully not C++03 164{ 165public: 166 explicit raw_storage_iterator(OutputIterator x); 167 raw_storage_iterator& operator*(); 168 raw_storage_iterator& operator=(const T& element); 169 raw_storage_iterator& operator++(); 170 raw_storage_iterator operator++(int); 171}; 172 173template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept; 174template <class T> void return_temporary_buffer(T* p) noexcept; 175 176template <class T> T* addressof(T& r) noexcept; 177template <class T> T* addressof(const T&& r) noexcept = delete; 178 179template <class InputIterator, class ForwardIterator> 180ForwardIterator 181uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result); 182 183template <class InputIterator, class Size, class ForwardIterator> 184ForwardIterator 185uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result); 186 187template <class ForwardIterator, class T> 188void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x); 189 190template <class ForwardIterator, class Size, class T> 191ForwardIterator 192uninitialized_fill_n(ForwardIterator first, Size n, const T& x); 193 194template <class T> 195void destroy_at(T* location); 196 197template <class ForwardIterator> 198 void destroy(ForwardIterator first, ForwardIterator last); 199 200template <class ForwardIterator, class Size> 201 ForwardIterator destroy_n(ForwardIterator first, Size n); 202 203template <class InputIterator, class ForwardIterator> 204 ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result); 205 206template <class InputIterator, class Size, class ForwardIterator> 207 pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result); 208 209template <class ForwardIterator> 210 void uninitialized_value_construct(ForwardIterator first, ForwardIterator last); 211 212template <class ForwardIterator, class Size> 213 ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n); 214 215template <class ForwardIterator> 216 void uninitialized_default_construct(ForwardIterator first, ForwardIterator last); 217 218template <class ForwardIterator, class Size> 219 ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n); 220 221template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17 222 223template<class X> 224class auto_ptr // deprecated in C++11, removed in C++17 225{ 226public: 227 typedef X element_type; 228 229 explicit auto_ptr(X* p =0) throw(); 230 auto_ptr(auto_ptr&) throw(); 231 template<class Y> auto_ptr(auto_ptr<Y>&) throw(); 232 auto_ptr& operator=(auto_ptr&) throw(); 233 template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw(); 234 auto_ptr& operator=(auto_ptr_ref<X> r) throw(); 235 ~auto_ptr() throw(); 236 237 typename add_lvalue_reference<X>::type operator*() const throw(); 238 X* operator->() const throw(); 239 X* get() const throw(); 240 X* release() throw(); 241 void reset(X* p =0) throw(); 242 243 auto_ptr(auto_ptr_ref<X>) throw(); 244 template<class Y> operator auto_ptr_ref<Y>() throw(); 245 template<class Y> operator auto_ptr<Y>() throw(); 246}; 247 248template <class T> 249struct default_delete 250{ 251 constexpr default_delete() noexcept = default; 252 template <class U> default_delete(const default_delete<U>&) noexcept; 253 254 void operator()(T*) const noexcept; 255}; 256 257template <class T> 258struct default_delete<T[]> 259{ 260 constexpr default_delete() noexcept = default; 261 void operator()(T*) const noexcept; 262 template <class U> void operator()(U*) const = delete; 263}; 264 265template <class T, class D = default_delete<T>> 266class unique_ptr 267{ 268public: 269 typedef see below pointer; 270 typedef T element_type; 271 typedef D deleter_type; 272 273 // constructors 274 constexpr unique_ptr() noexcept; 275 explicit unique_ptr(pointer p) noexcept; 276 unique_ptr(pointer p, see below d1) noexcept; 277 unique_ptr(pointer p, see below d2) noexcept; 278 unique_ptr(unique_ptr&& u) noexcept; 279 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 280 template <class U, class E> 281 unique_ptr(unique_ptr<U, E>&& u) noexcept; 282 template <class U> 283 unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17 284 285 // destructor 286 ~unique_ptr(); 287 288 // assignment 289 unique_ptr& operator=(unique_ptr&& u) noexcept; 290 template <class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept; 291 unique_ptr& operator=(nullptr_t) noexcept; 292 293 // observers 294 typename add_lvalue_reference<T>::type operator*() const; 295 pointer operator->() const noexcept; 296 pointer get() const noexcept; 297 deleter_type& get_deleter() noexcept; 298 const deleter_type& get_deleter() const noexcept; 299 explicit operator bool() const noexcept; 300 301 // modifiers 302 pointer release() noexcept; 303 void reset(pointer p = pointer()) noexcept; 304 void swap(unique_ptr& u) noexcept; 305}; 306 307template <class T, class D> 308class unique_ptr<T[], D> 309{ 310public: 311 typedef implementation-defined pointer; 312 typedef T element_type; 313 typedef D deleter_type; 314 315 // constructors 316 constexpr unique_ptr() noexcept; 317 explicit unique_ptr(pointer p) noexcept; 318 unique_ptr(pointer p, see below d) noexcept; 319 unique_ptr(pointer p, see below d) noexcept; 320 unique_ptr(unique_ptr&& u) noexcept; 321 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 322 323 // destructor 324 ~unique_ptr(); 325 326 // assignment 327 unique_ptr& operator=(unique_ptr&& u) noexcept; 328 unique_ptr& operator=(nullptr_t) noexcept; 329 330 // observers 331 T& operator[](size_t i) const; 332 pointer get() const noexcept; 333 deleter_type& get_deleter() noexcept; 334 const deleter_type& get_deleter() const noexcept; 335 explicit operator bool() const noexcept; 336 337 // modifiers 338 pointer release() noexcept; 339 void reset(pointer p = pointer()) noexcept; 340 void reset(nullptr_t) noexcept; 341 template <class U> void reset(U) = delete; 342 void swap(unique_ptr& u) noexcept; 343}; 344 345template <class T, class D> 346 void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept; 347 348template <class T1, class D1, class T2, class D2> 349 bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 350template <class T1, class D1, class T2, class D2> 351 bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 352template <class T1, class D1, class T2, class D2> 353 bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 354template <class T1, class D1, class T2, class D2> 355 bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 356template <class T1, class D1, class T2, class D2> 357 bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 358template <class T1, class D1, class T2, class D2> 359 bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 360 361template <class T, class D> 362 bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; 363template <class T, class D> 364 bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept; 365template <class T, class D> 366 bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; 367template <class T, class D> 368 bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept; 369 370template <class T, class D> 371 bool operator<(const unique_ptr<T, D>& x, nullptr_t); 372template <class T, class D> 373 bool operator<(nullptr_t, const unique_ptr<T, D>& y); 374template <class T, class D> 375 bool operator<=(const unique_ptr<T, D>& x, nullptr_t); 376template <class T, class D> 377 bool operator<=(nullptr_t, const unique_ptr<T, D>& y); 378template <class T, class D> 379 bool operator>(const unique_ptr<T, D>& x, nullptr_t); 380template <class T, class D> 381 bool operator>(nullptr_t, const unique_ptr<T, D>& y); 382template <class T, class D> 383 bool operator>=(const unique_ptr<T, D>& x, nullptr_t); 384template <class T, class D> 385 bool operator>=(nullptr_t, const unique_ptr<T, D>& y); 386 387class bad_weak_ptr 388 : public std::exception 389{ 390 bad_weak_ptr() noexcept; 391}; 392 393template<class T, class... Args> unique_ptr<T> make_unique(Args&&... args); // C++14 394template<class T> unique_ptr<T> make_unique(size_t n); // C++14 395template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N] 396 397template<class E, class T, class Y, class D> 398 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, unique_ptr<Y, D> const& p); 399 400template<class T> 401class shared_ptr 402{ 403public: 404 typedef T element_type; 405 typedef weak_ptr<T> weak_type; // C++17 406 407 // constructors: 408 constexpr shared_ptr() noexcept; 409 template<class Y> explicit shared_ptr(Y* p); 410 template<class Y, class D> shared_ptr(Y* p, D d); 411 template<class Y, class D, class A> shared_ptr(Y* p, D d, A a); 412 template <class D> shared_ptr(nullptr_t p, D d); 413 template <class D, class A> shared_ptr(nullptr_t p, D d, A a); 414 template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept; 415 shared_ptr(const shared_ptr& r) noexcept; 416 template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept; 417 shared_ptr(shared_ptr&& r) noexcept; 418 template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept; 419 template<class Y> explicit shared_ptr(const weak_ptr<Y>& r); 420 template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17 421 template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r); 422 shared_ptr(nullptr_t) : shared_ptr() { } 423 424 // destructor: 425 ~shared_ptr(); 426 427 // assignment: 428 shared_ptr& operator=(const shared_ptr& r) noexcept; 429 template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept; 430 shared_ptr& operator=(shared_ptr&& r) noexcept; 431 template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r); 432 template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17 433 template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r); 434 435 // modifiers: 436 void swap(shared_ptr& r) noexcept; 437 void reset() noexcept; 438 template<class Y> void reset(Y* p); 439 template<class Y, class D> void reset(Y* p, D d); 440 template<class Y, class D, class A> void reset(Y* p, D d, A a); 441 442 // observers: 443 T* get() const noexcept; 444 T& operator*() const noexcept; 445 T* operator->() const noexcept; 446 long use_count() const noexcept; 447 bool unique() const noexcept; 448 explicit operator bool() const noexcept; 449 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 450 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 451}; 452 453template<class T> 454shared_ptr(weak_ptr<T>) -> shared_ptr<T>; 455template<class T, class D> 456shared_ptr(unique_ptr<T, D>) -> shared_ptr<T>; 457 458// shared_ptr comparisons: 459template<class T, class U> 460 bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 461template<class T, class U> 462 bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 463template<class T, class U> 464 bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 465template<class T, class U> 466 bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 467template<class T, class U> 468 bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 469template<class T, class U> 470 bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 471 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> 483bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept; 484template <class T> 485 bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept; 486template <class T> 487 bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept; 488template <class T> 489 bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept; 490template <class T> 491 bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept; 492template <class T> 493 bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept; 494template <class T> 495 bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept; 496 497// shared_ptr specialized algorithms: 498template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept; 499 500// shared_ptr casts: 501template<class T, class U> 502 shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept; 503template<class T, class U> 504 shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept; 505template<class T, class U> 506 shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept; 507 508// shared_ptr I/O: 509template<class E, class T, class Y> 510 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p); 511 512// shared_ptr get_deleter: 513template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept; 514 515template<class T, class... Args> 516 shared_ptr<T> make_shared(Args&&... args); 517template<class T, class A, class... Args> 518 shared_ptr<T> allocate_shared(const A& a, Args&&... args); 519 520template<class T> 521class weak_ptr 522{ 523public: 524 typedef T element_type; 525 526 // constructors 527 constexpr weak_ptr() noexcept; 528 template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept; 529 weak_ptr(weak_ptr const& r) noexcept; 530 template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept; 531 weak_ptr(weak_ptr&& r) noexcept; // C++14 532 template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14 533 534 // destructor 535 ~weak_ptr(); 536 537 // assignment 538 weak_ptr& operator=(weak_ptr const& r) noexcept; 539 template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept; 540 template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept; 541 weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14 542 template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14 543 544 // modifiers 545 void swap(weak_ptr& r) noexcept; 546 void reset() noexcept; 547 548 // observers 549 long use_count() const noexcept; 550 bool expired() const noexcept; 551 shared_ptr<T> lock() const noexcept; 552 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 553 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 554}; 555 556template<class T> 557weak_ptr(shared_ptr<T>) -> weak_ptr<T>; 558 559// weak_ptr specialized algorithms: 560template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept; 561 562// class owner_less: 563template<class T> struct owner_less; 564 565template<class T> 566struct owner_less<shared_ptr<T> > 567 : binary_function<shared_ptr<T>, shared_ptr<T>, bool> 568{ 569 typedef bool result_type; 570 bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept; 571 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 572 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 573}; 574 575template<class T> 576struct owner_less<weak_ptr<T> > 577 : binary_function<weak_ptr<T>, weak_ptr<T>, bool> 578{ 579 typedef bool result_type; 580 bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept; 581 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 582 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 583}; 584 585template <> // Added in C++14 586struct owner_less<void> 587{ 588 template <class _Tp, class _Up> 589 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 590 template <class _Tp, class _Up> 591 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 592 template <class _Tp, class _Up> 593 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 594 template <class _Tp, class _Up> 595 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 596 597 typedef void is_transparent; 598}; 599 600template<class T> 601class enable_shared_from_this 602{ 603protected: 604 constexpr enable_shared_from_this() noexcept; 605 enable_shared_from_this(enable_shared_from_this const&) noexcept; 606 enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept; 607 ~enable_shared_from_this(); 608public: 609 shared_ptr<T> shared_from_this(); 610 shared_ptr<T const> shared_from_this() const; 611}; 612 613template<class T> 614 bool atomic_is_lock_free(const shared_ptr<T>* p); 615template<class T> 616 shared_ptr<T> atomic_load(const shared_ptr<T>* p); 617template<class T> 618 shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo); 619template<class T> 620 void atomic_store(shared_ptr<T>* p, shared_ptr<T> r); 621template<class T> 622 void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 623template<class T> 624 shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r); 625template<class T> 626 shared_ptr<T> 627 atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 628template<class T> 629 bool 630 atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 631template<class T> 632 bool 633 atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 634template<class T> 635 bool 636 atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 637 shared_ptr<T> w, memory_order success, 638 memory_order failure); 639template<class T> 640 bool 641 atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 642 shared_ptr<T> w, memory_order success, 643 memory_order failure); 644// Hash support 645template <class T> struct hash; 646template <class T, class D> struct hash<unique_ptr<T, D> >; 647template <class T> struct hash<shared_ptr<T> >; 648 649template <class T, class Alloc> 650 inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value; 651 652// Pointer safety 653enum class pointer_safety { relaxed, preferred, strict }; 654void declare_reachable(void *p); 655template <class T> T *undeclare_reachable(T *p); 656void declare_no_pointers(char *p, size_t n); 657void undeclare_no_pointers(char *p, size_t n); 658pointer_safety get_pointer_safety() noexcept; 659 660void* align(size_t alignment, size_t size, void*& ptr, size_t& space); 661 662} // std 663 664*/ 665 666#include <__config> 667#include <type_traits> 668#include <typeinfo> 669#include <cstddef> 670#include <cstdint> 671#include <new> 672#include <utility> 673#include <limits> 674#include <iterator> 675#include <__functional_base> 676#include <iosfwd> 677#include <tuple> 678#include <stdexcept> 679#include <cstring> 680#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 681# include <atomic> 682#endif 683#include <version> 684 685#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 686#pragma GCC system_header 687#endif 688 689_LIBCPP_PUSH_MACROS 690#include <__undef_macros> 691 692 693_LIBCPP_BEGIN_NAMESPACE_STD 694 695template <class _ValueType> 696inline _LIBCPP_INLINE_VISIBILITY 697_ValueType __libcpp_relaxed_load(_ValueType const* __value) { 698#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 699 defined(__ATOMIC_RELAXED) && \ 700 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 701 return __atomic_load_n(__value, __ATOMIC_RELAXED); 702#else 703 return *__value; 704#endif 705} 706 707template <class _ValueType> 708inline _LIBCPP_INLINE_VISIBILITY 709_ValueType __libcpp_acquire_load(_ValueType const* __value) { 710#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 711 defined(__ATOMIC_ACQUIRE) && \ 712 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 713 return __atomic_load_n(__value, __ATOMIC_ACQUIRE); 714#else 715 return *__value; 716#endif 717} 718 719// addressof moved to <type_traits> 720 721template <class _Tp> class allocator; 722 723#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 724template <> 725class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 allocator<void> 726{ 727public: 728 typedef void* pointer; 729 typedef const void* const_pointer; 730 typedef void value_type; 731 732 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 733}; 734 735template <> 736class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 allocator<const void> 737{ 738public: 739 typedef const void* pointer; 740 typedef const void* const_pointer; 741 typedef const void value_type; 742 743 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 744}; 745#endif 746 747// pointer_traits 748 749template <class _Tp, class = void> 750struct __has_element_type : false_type {}; 751 752template <class _Tp> 753struct __has_element_type<_Tp, 754 typename __void_t<typename _Tp::element_type>::type> : true_type {}; 755 756template <class _Ptr, bool = __has_element_type<_Ptr>::value> 757struct __pointer_traits_element_type; 758 759template <class _Ptr> 760struct __pointer_traits_element_type<_Ptr, true> 761{ 762 typedef _LIBCPP_NODEBUG_TYPE typename _Ptr::element_type type; 763}; 764 765#ifndef _LIBCPP_HAS_NO_VARIADICS 766 767template <template <class, class...> class _Sp, class _Tp, class ..._Args> 768struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, true> 769{ 770 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::element_type type; 771}; 772 773template <template <class, class...> class _Sp, class _Tp, class ..._Args> 774struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, false> 775{ 776 typedef _LIBCPP_NODEBUG_TYPE _Tp type; 777}; 778 779#else // _LIBCPP_HAS_NO_VARIADICS 780 781template <template <class> class _Sp, class _Tp> 782struct __pointer_traits_element_type<_Sp<_Tp>, true> 783{ 784 typedef typename _Sp<_Tp>::element_type type; 785}; 786 787template <template <class> class _Sp, class _Tp> 788struct __pointer_traits_element_type<_Sp<_Tp>, false> 789{ 790 typedef _Tp type; 791}; 792 793template <template <class, class> class _Sp, class _Tp, class _A0> 794struct __pointer_traits_element_type<_Sp<_Tp, _A0>, true> 795{ 796 typedef typename _Sp<_Tp, _A0>::element_type type; 797}; 798 799template <template <class, class> class _Sp, class _Tp, class _A0> 800struct __pointer_traits_element_type<_Sp<_Tp, _A0>, false> 801{ 802 typedef _Tp type; 803}; 804 805template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1> 806struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, true> 807{ 808 typedef typename _Sp<_Tp, _A0, _A1>::element_type type; 809}; 810 811template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1> 812struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, false> 813{ 814 typedef _Tp type; 815}; 816 817template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 818 class _A1, class _A2> 819struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, true> 820{ 821 typedef typename _Sp<_Tp, _A0, _A1, _A2>::element_type type; 822}; 823 824template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 825 class _A1, class _A2> 826struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, false> 827{ 828 typedef _Tp type; 829}; 830 831#endif // _LIBCPP_HAS_NO_VARIADICS 832 833template <class _Tp, class = void> 834struct __has_difference_type : false_type {}; 835 836template <class _Tp> 837struct __has_difference_type<_Tp, 838 typename __void_t<typename _Tp::difference_type>::type> : true_type {}; 839 840template <class _Ptr, bool = __has_difference_type<_Ptr>::value> 841struct __pointer_traits_difference_type 842{ 843 typedef _LIBCPP_NODEBUG_TYPE ptrdiff_t type; 844}; 845 846template <class _Ptr> 847struct __pointer_traits_difference_type<_Ptr, true> 848{ 849 typedef _LIBCPP_NODEBUG_TYPE typename _Ptr::difference_type type; 850}; 851 852template <class _Tp, class _Up> 853struct __has_rebind 854{ 855private: 856 struct __two {char __lx; char __lxx;}; 857 template <class _Xp> static __two __test(...); 858 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 859 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>* = 0); 860 _LIBCPP_SUPPRESS_DEPRECATED_POP 861public: 862 static const bool value = sizeof(__test<_Tp>(0)) == 1; 863}; 864 865template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 866struct __pointer_traits_rebind 867{ 868#ifndef _LIBCPP_CXX03_LANG 869 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up> type; 870#else 871 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up>::other type; 872#endif 873}; 874 875#ifndef _LIBCPP_HAS_NO_VARIADICS 876 877template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 878struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, true> 879{ 880#ifndef _LIBCPP_CXX03_LANG 881 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::template rebind<_Up> type; 882#else 883 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::template rebind<_Up>::other type; 884#endif 885}; 886 887template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 888struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, false> 889{ 890 typedef _Sp<_Up, _Args...> type; 891}; 892 893#else // _LIBCPP_HAS_NO_VARIADICS 894 895template <template <class> class _Sp, class _Tp, class _Up> 896struct __pointer_traits_rebind<_Sp<_Tp>, _Up, true> 897{ 898#ifndef _LIBCPP_CXX03_LANG 899 typedef typename _Sp<_Tp>::template rebind<_Up> type; 900#else 901 typedef typename _Sp<_Tp>::template rebind<_Up>::other type; 902#endif 903}; 904 905template <template <class> class _Sp, class _Tp, class _Up> 906struct __pointer_traits_rebind<_Sp<_Tp>, _Up, false> 907{ 908 typedef _Sp<_Up> type; 909}; 910 911template <template <class, class> class _Sp, class _Tp, class _A0, class _Up> 912struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, true> 913{ 914#ifndef _LIBCPP_CXX03_LANG 915 typedef typename _Sp<_Tp, _A0>::template rebind<_Up> type; 916#else 917 typedef typename _Sp<_Tp, _A0>::template rebind<_Up>::other type; 918#endif 919}; 920 921template <template <class, class> class _Sp, class _Tp, class _A0, class _Up> 922struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, false> 923{ 924 typedef _Sp<_Up, _A0> type; 925}; 926 927template <template <class, class, class> class _Sp, class _Tp, class _A0, 928 class _A1, class _Up> 929struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, true> 930{ 931#ifndef _LIBCPP_CXX03_LANG 932 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up> type; 933#else 934 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up>::other type; 935#endif 936}; 937 938template <template <class, class, class> class _Sp, class _Tp, class _A0, 939 class _A1, class _Up> 940struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, false> 941{ 942 typedef _Sp<_Up, _A0, _A1> type; 943}; 944 945template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 946 class _A1, class _A2, class _Up> 947struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, true> 948{ 949#ifndef _LIBCPP_CXX03_LANG 950 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up> type; 951#else 952 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type; 953#endif 954}; 955 956template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 957 class _A1, class _A2, class _Up> 958struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, false> 959{ 960 typedef _Sp<_Up, _A0, _A1, _A2> type; 961}; 962 963#endif // _LIBCPP_HAS_NO_VARIADICS 964 965template <class _Ptr> 966struct _LIBCPP_TEMPLATE_VIS pointer_traits 967{ 968 typedef _Ptr pointer; 969 typedef typename __pointer_traits_element_type<pointer>::type element_type; 970 typedef typename __pointer_traits_difference_type<pointer>::type difference_type; 971 972#ifndef _LIBCPP_CXX03_LANG 973 template <class _Up> using rebind = typename __pointer_traits_rebind<pointer, _Up>::type; 974#else 975 template <class _Up> struct rebind 976 {typedef typename __pointer_traits_rebind<pointer, _Up>::type other;}; 977#endif // _LIBCPP_CXX03_LANG 978 979private: 980 struct __nat {}; 981public: 982 _LIBCPP_INLINE_VISIBILITY 983 static pointer pointer_to(typename conditional<is_void<element_type>::value, 984 __nat, element_type>::type& __r) 985 {return pointer::pointer_to(__r);} 986}; 987 988template <class _Tp> 989struct _LIBCPP_TEMPLATE_VIS pointer_traits<_Tp*> 990{ 991 typedef _Tp* pointer; 992 typedef _Tp element_type; 993 typedef ptrdiff_t difference_type; 994 995#ifndef _LIBCPP_CXX03_LANG 996 template <class _Up> using rebind = _Up*; 997#else 998 template <class _Up> struct rebind {typedef _Up* other;}; 999#endif 1000 1001private: 1002 struct __nat {}; 1003public: 1004 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1005 static pointer pointer_to(typename conditional<is_void<element_type>::value, 1006 __nat, element_type>::type& __r) _NOEXCEPT 1007 {return _VSTD::addressof(__r);} 1008}; 1009 1010template <class _From, class _To> 1011struct __rebind_pointer { 1012#ifndef _LIBCPP_CXX03_LANG 1013 typedef typename pointer_traits<_From>::template rebind<_To> type; 1014#else 1015 typedef typename pointer_traits<_From>::template rebind<_To>::other type; 1016#endif 1017}; 1018 1019// allocator_traits 1020 1021template <class _Tp, class = void> 1022struct __has_pointer_type : false_type {}; 1023 1024template <class _Tp> 1025struct __has_pointer_type<_Tp, 1026 typename __void_t<typename _Tp::pointer>::type> : true_type {}; 1027 1028namespace __pointer_type_imp 1029{ 1030 1031template <class _Tp, class _Dp, bool = __has_pointer_type<_Dp>::value> 1032struct __pointer_type 1033{ 1034 typedef _LIBCPP_NODEBUG_TYPE typename _Dp::pointer type; 1035}; 1036 1037template <class _Tp, class _Dp> 1038struct __pointer_type<_Tp, _Dp, false> 1039{ 1040 typedef _LIBCPP_NODEBUG_TYPE _Tp* type; 1041}; 1042 1043} // __pointer_type_imp 1044 1045template <class _Tp, class _Dp> 1046struct __pointer_type 1047{ 1048 typedef _LIBCPP_NODEBUG_TYPE typename __pointer_type_imp::__pointer_type<_Tp, typename remove_reference<_Dp>::type>::type type; 1049}; 1050 1051template <class _Tp, class = void> 1052struct __has_const_pointer : false_type {}; 1053 1054template <class _Tp> 1055struct __has_const_pointer<_Tp, 1056 typename __void_t<typename _Tp::const_pointer>::type> : true_type {}; 1057 1058template <class _Tp, class _Ptr, class _Alloc, bool = __has_const_pointer<_Alloc>::value> 1059struct __const_pointer 1060{ 1061 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::const_pointer type; 1062}; 1063 1064template <class _Tp, class _Ptr, class _Alloc> 1065struct __const_pointer<_Tp, _Ptr, _Alloc, false> 1066{ 1067#ifndef _LIBCPP_CXX03_LANG 1068 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const _Tp> type; 1069#else 1070 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp>::other type; 1071#endif 1072}; 1073 1074template <class _Tp, class = void> 1075struct __has_void_pointer : false_type {}; 1076 1077template <class _Tp> 1078struct __has_void_pointer<_Tp, 1079 typename __void_t<typename _Tp::void_pointer>::type> : true_type {}; 1080 1081template <class _Ptr, class _Alloc, bool = __has_void_pointer<_Alloc>::value> 1082struct __void_pointer 1083{ 1084 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::void_pointer type; 1085}; 1086 1087template <class _Ptr, class _Alloc> 1088struct __void_pointer<_Ptr, _Alloc, false> 1089{ 1090#ifndef _LIBCPP_CXX03_LANG 1091 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<void> type; 1092#else 1093 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<void>::other type; 1094#endif 1095}; 1096 1097template <class _Tp, class = void> 1098struct __has_const_void_pointer : false_type {}; 1099 1100template <class _Tp> 1101struct __has_const_void_pointer<_Tp, 1102 typename __void_t<typename _Tp::const_void_pointer>::type> : true_type {}; 1103 1104template <class _Ptr, class _Alloc, bool = __has_const_void_pointer<_Alloc>::value> 1105struct __const_void_pointer 1106{ 1107 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::const_void_pointer type; 1108}; 1109 1110template <class _Ptr, class _Alloc> 1111struct __const_void_pointer<_Ptr, _Alloc, false> 1112{ 1113#ifndef _LIBCPP_CXX03_LANG 1114 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const void> type; 1115#else 1116 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const void>::other type; 1117#endif 1118}; 1119 1120 1121template <bool _UsePointerTraits> struct __to_address_helper; 1122 1123template <> struct __to_address_helper<true> { 1124 template <class _Pointer> 1125 using __return_type = decltype(pointer_traits<_Pointer>::to_address(std::declval<const _Pointer&>())); 1126 1127 template <class _Pointer> 1128 _LIBCPP_CONSTEXPR 1129 static __return_type<_Pointer> 1130 __do_it(const _Pointer &__p) _NOEXCEPT { return pointer_traits<_Pointer>::to_address(__p); } 1131}; 1132 1133template <class _Pointer, bool _Dummy = true> 1134using __choose_to_address = __to_address_helper<_IsValidExpansion<__to_address_helper<_Dummy>::template __return_type, _Pointer>::value>; 1135 1136 1137template <class _Tp> 1138inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1139_Tp* 1140__to_address(_Tp* __p) _NOEXCEPT 1141{ 1142 static_assert(!is_function<_Tp>::value, "_Tp is a function type"); 1143 return __p; 1144} 1145 1146template <class _Pointer> 1147inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1148typename __choose_to_address<_Pointer>::template __return_type<_Pointer> 1149__to_address(const _Pointer& __p) _NOEXCEPT { 1150 return __choose_to_address<_Pointer>::__do_it(__p); 1151} 1152 1153template <> struct __to_address_helper<false> { 1154 template <class _Pointer> 1155 using __return_type = typename pointer_traits<_Pointer>::element_type*; 1156 1157 template <class _Pointer> 1158 _LIBCPP_CONSTEXPR 1159 static __return_type<_Pointer> 1160 __do_it(const _Pointer &__p) _NOEXCEPT { return std::__to_address(__p.operator->()); } 1161}; 1162 1163 1164#if _LIBCPP_STD_VER > 17 1165template <class _Tp> 1166inline _LIBCPP_INLINE_VISIBILITY constexpr 1167_Tp* 1168to_address(_Tp* __p) _NOEXCEPT 1169{ 1170 static_assert(!is_function_v<_Tp>, "_Tp is a function type"); 1171 return __p; 1172} 1173 1174template <class _Pointer> 1175inline _LIBCPP_INLINE_VISIBILITY 1176auto 1177to_address(const _Pointer& __p) _NOEXCEPT 1178{ 1179 return _VSTD::__to_address(__p); 1180} 1181#endif 1182 1183template <class _Tp, class = void> 1184struct __has_size_type : false_type {}; 1185 1186template <class _Tp> 1187struct __has_size_type<_Tp, 1188 typename __void_t<typename _Tp::size_type>::type> : true_type {}; 1189 1190template <class _Alloc, class _DiffType, bool = __has_size_type<_Alloc>::value> 1191struct __size_type 1192{ 1193 typedef _LIBCPP_NODEBUG_TYPE typename make_unsigned<_DiffType>::type type; 1194}; 1195 1196template <class _Alloc, class _DiffType> 1197struct __size_type<_Alloc, _DiffType, true> 1198{ 1199 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::size_type type; 1200}; 1201 1202template <class _Tp, class = void> 1203struct __has_propagate_on_container_copy_assignment : false_type {}; 1204 1205template <class _Tp> 1206struct __has_propagate_on_container_copy_assignment<_Tp, 1207 typename __void_t<typename _Tp::propagate_on_container_copy_assignment>::type> 1208 : true_type {}; 1209 1210template <class _Alloc, bool = __has_propagate_on_container_copy_assignment<_Alloc>::value> 1211struct __propagate_on_container_copy_assignment 1212{ 1213 typedef _LIBCPP_NODEBUG_TYPE false_type type; 1214}; 1215 1216template <class _Alloc> 1217struct __propagate_on_container_copy_assignment<_Alloc, true> 1218{ 1219 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_copy_assignment type; 1220}; 1221 1222template <class _Tp, class = void> 1223struct __has_propagate_on_container_move_assignment : false_type {}; 1224 1225template <class _Tp> 1226struct __has_propagate_on_container_move_assignment<_Tp, 1227 typename __void_t<typename _Tp::propagate_on_container_move_assignment>::type> 1228 : true_type {}; 1229 1230template <class _Alloc, bool = __has_propagate_on_container_move_assignment<_Alloc>::value> 1231struct __propagate_on_container_move_assignment 1232{ 1233 typedef false_type type; 1234}; 1235 1236template <class _Alloc> 1237struct __propagate_on_container_move_assignment<_Alloc, true> 1238{ 1239 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_move_assignment type; 1240}; 1241 1242template <class _Tp, class = void> 1243struct __has_propagate_on_container_swap : false_type {}; 1244 1245template <class _Tp> 1246struct __has_propagate_on_container_swap<_Tp, 1247 typename __void_t<typename _Tp::propagate_on_container_swap>::type> 1248 : true_type {}; 1249 1250template <class _Alloc, bool = __has_propagate_on_container_swap<_Alloc>::value> 1251struct __propagate_on_container_swap 1252{ 1253 typedef false_type type; 1254}; 1255 1256template <class _Alloc> 1257struct __propagate_on_container_swap<_Alloc, true> 1258{ 1259 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_swap type; 1260}; 1261 1262template <class _Tp, class = void> 1263struct __has_is_always_equal : false_type {}; 1264 1265template <class _Tp> 1266struct __has_is_always_equal<_Tp, 1267 typename __void_t<typename _Tp::is_always_equal>::type> 1268 : true_type {}; 1269 1270template <class _Alloc, bool = __has_is_always_equal<_Alloc>::value> 1271struct __is_always_equal 1272{ 1273 typedef _LIBCPP_NODEBUG_TYPE typename _VSTD::is_empty<_Alloc>::type type; 1274}; 1275 1276template <class _Alloc> 1277struct __is_always_equal<_Alloc, true> 1278{ 1279 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::is_always_equal type; 1280}; 1281 1282template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 1283struct __has_rebind_other 1284{ 1285private: 1286 struct __two {char __lx; char __lxx;}; 1287 template <class _Xp> static __two __test(...); 1288 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1289 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>::other* = 0); 1290 _LIBCPP_SUPPRESS_DEPRECATED_POP 1291public: 1292 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1293}; 1294 1295template <class _Tp, class _Up> 1296struct __has_rebind_other<_Tp, _Up, false> 1297{ 1298 static const bool value = false; 1299}; 1300 1301template <class _Tp, class _Up, bool = __has_rebind_other<_Tp, _Up>::value> 1302struct __allocator_traits_rebind 1303{ 1304 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1305 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up>::other type; 1306 _LIBCPP_SUPPRESS_DEPRECATED_POP 1307}; 1308 1309template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1310struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, true> 1311{ 1312 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1313 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc<_Tp, _Args...>::template rebind<_Up>::other type; 1314 _LIBCPP_SUPPRESS_DEPRECATED_POP 1315}; 1316 1317template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1318struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, false> 1319{ 1320 typedef _LIBCPP_NODEBUG_TYPE _Alloc<_Up, _Args...> type; 1321}; 1322 1323#ifndef _LIBCPP_CXX03_LANG 1324 1325_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1326template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1327auto 1328__has_allocate_hint_test(_Alloc&& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1329 -> decltype((void)__a.allocate(__sz, __p), true_type()); 1330_LIBCPP_SUPPRESS_DEPRECATED_POP 1331 1332template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1333auto 1334__has_allocate_hint_test(const _Alloc& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1335 -> false_type; 1336 1337template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1338struct __has_allocate_hint 1339 : decltype(_VSTD::__has_allocate_hint_test(declval<_Alloc>(), 1340 declval<_SizeType>(), 1341 declval<_ConstVoidPtr>())) 1342{ 1343}; 1344 1345#else // _LIBCPP_CXX03_LANG 1346 1347template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1348struct __has_allocate_hint 1349 : true_type 1350{ 1351}; 1352 1353#endif // _LIBCPP_CXX03_LANG 1354 1355#if !defined(_LIBCPP_CXX03_LANG) 1356 1357_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1358template <class _Alloc, class _Tp, class... _Args> 1359auto 1360__has_construct_test(_Alloc&& __a, _Tp* __p, _Args&&... __args) 1361 -> decltype(__a.construct(__p, _VSTD::forward<_Args>(__args)...), true_type()); 1362_LIBCPP_SUPPRESS_DEPRECATED_POP 1363 1364template <class _Alloc, class _Pointer, class ..._Args> 1365auto 1366__has_construct_test(const _Alloc& __a, _Pointer&& __p, _Args&& ...__args) 1367 -> false_type; 1368 1369template <class _Alloc, class _Pointer, class ..._Args> 1370struct __has_construct 1371 : decltype(_VSTD::__has_construct_test(declval<_Alloc>(), 1372 declval<_Pointer>(), 1373 declval<_Args>()...)) 1374{ 1375}; 1376 1377_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1378template <class _Alloc, class _Pointer> 1379auto 1380__has_destroy_test(_Alloc&& __a, _Pointer&& __p) 1381 -> decltype(__a.destroy(__p), true_type()); 1382_LIBCPP_SUPPRESS_DEPRECATED_POP 1383 1384template <class _Alloc, class _Pointer> 1385auto 1386__has_destroy_test(const _Alloc& __a, _Pointer&& __p) 1387 -> false_type; 1388 1389template <class _Alloc, class _Pointer> 1390struct __has_destroy 1391 : decltype(_VSTD::__has_destroy_test(declval<_Alloc>(), 1392 declval<_Pointer>())) 1393{ 1394}; 1395 1396_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1397template <class _Alloc> 1398auto 1399__has_max_size_test(_Alloc&& __a) 1400 -> decltype(__a.max_size(), true_type()); 1401_LIBCPP_SUPPRESS_DEPRECATED_POP 1402 1403template <class _Alloc> 1404auto 1405__has_max_size_test(const volatile _Alloc& __a) 1406 -> false_type; 1407 1408template <class _Alloc> 1409struct __has_max_size 1410 : decltype(_VSTD::__has_max_size_test(declval<_Alloc&>())) 1411{ 1412}; 1413 1414template <class _Alloc> 1415auto 1416__has_select_on_container_copy_construction_test(_Alloc&& __a) 1417 -> decltype(__a.select_on_container_copy_construction(), true_type()); 1418 1419template <class _Alloc> 1420auto 1421__has_select_on_container_copy_construction_test(const volatile _Alloc& __a) 1422 -> false_type; 1423 1424template <class _Alloc> 1425struct __has_select_on_container_copy_construction 1426 : decltype(_VSTD::__has_select_on_container_copy_construction_test(declval<_Alloc&>())) 1427{ 1428}; 1429 1430#else // _LIBCPP_CXX03_LANG 1431 1432template <class _Alloc, class _Pointer, class _Tp, class = void> 1433struct __has_construct : std::false_type {}; 1434 1435template <class _Alloc, class _Pointer, class _Tp> 1436struct __has_construct<_Alloc, _Pointer, _Tp, typename __void_t< 1437 decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Pointer>(), _VSTD::declval<_Tp>())) 1438>::type> : std::true_type {}; 1439 1440template <class _Alloc, class _Pointer, class = void> 1441struct __has_destroy : false_type {}; 1442 1443template <class _Alloc, class _Pointer> 1444struct __has_destroy<_Alloc, _Pointer, typename __void_t< 1445 decltype(_VSTD::declval<_Alloc>().destroy(_VSTD::declval<_Pointer>())) 1446>::type> : std::true_type {}; 1447 1448template <class _Alloc> 1449struct __has_max_size 1450 : true_type 1451{ 1452}; 1453 1454template <class _Alloc> 1455struct __has_select_on_container_copy_construction 1456 : false_type 1457{ 1458}; 1459 1460#endif // _LIBCPP_CXX03_LANG 1461 1462template <class _Alloc, class _Ptr, bool = __has_difference_type<_Alloc>::value> 1463struct __alloc_traits_difference_type 1464{ 1465 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::difference_type type; 1466}; 1467 1468template <class _Alloc, class _Ptr> 1469struct __alloc_traits_difference_type<_Alloc, _Ptr, true> 1470{ 1471 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::difference_type type; 1472}; 1473 1474template <class _Tp> 1475struct __is_default_allocator : false_type {}; 1476 1477template <class _Tp> 1478struct __is_default_allocator<_VSTD::allocator<_Tp> > : true_type {}; 1479 1480 1481 1482template <class _Alloc, 1483 bool = __has_construct<_Alloc, typename _Alloc::value_type*, typename _Alloc::value_type&&>::value && !__is_default_allocator<_Alloc>::value 1484 > 1485struct __is_cpp17_move_insertable; 1486template <class _Alloc> 1487struct __is_cpp17_move_insertable<_Alloc, true> : std::true_type {}; 1488template <class _Alloc> 1489struct __is_cpp17_move_insertable<_Alloc, false> : std::is_move_constructible<typename _Alloc::value_type> {}; 1490 1491template <class _Alloc, 1492 bool = __has_construct<_Alloc, typename _Alloc::value_type*, const typename _Alloc::value_type&>::value && !__is_default_allocator<_Alloc>::value 1493 > 1494struct __is_cpp17_copy_insertable; 1495template <class _Alloc> 1496struct __is_cpp17_copy_insertable<_Alloc, true> : __is_cpp17_move_insertable<_Alloc> {}; 1497template <class _Alloc> 1498struct __is_cpp17_copy_insertable<_Alloc, false> : integral_constant<bool, 1499 std::is_copy_constructible<typename _Alloc::value_type>::value && 1500 __is_cpp17_move_insertable<_Alloc>::value> 1501 {}; 1502 1503 1504 1505template <class _Alloc> 1506struct _LIBCPP_TEMPLATE_VIS allocator_traits 1507{ 1508 typedef _Alloc allocator_type; 1509 typedef typename allocator_type::value_type value_type; 1510 1511 typedef typename __pointer_type<value_type, allocator_type>::type pointer; 1512 typedef typename __const_pointer<value_type, pointer, allocator_type>::type const_pointer; 1513 typedef typename __void_pointer<pointer, allocator_type>::type void_pointer; 1514 typedef typename __const_void_pointer<pointer, allocator_type>::type const_void_pointer; 1515 1516 typedef typename __alloc_traits_difference_type<allocator_type, pointer>::type difference_type; 1517 typedef typename __size_type<allocator_type, difference_type>::type size_type; 1518 1519 typedef typename __propagate_on_container_copy_assignment<allocator_type>::type 1520 propagate_on_container_copy_assignment; 1521 typedef typename __propagate_on_container_move_assignment<allocator_type>::type 1522 propagate_on_container_move_assignment; 1523 typedef typename __propagate_on_container_swap<allocator_type>::type 1524 propagate_on_container_swap; 1525 typedef typename __is_always_equal<allocator_type>::type 1526 is_always_equal; 1527 1528#ifndef _LIBCPP_CXX03_LANG 1529 template <class _Tp> using rebind_alloc = 1530 typename __allocator_traits_rebind<allocator_type, _Tp>::type; 1531 template <class _Tp> using rebind_traits = allocator_traits<rebind_alloc<_Tp> >; 1532#else // _LIBCPP_CXX03_LANG 1533 template <class _Tp> struct rebind_alloc 1534 {typedef typename __allocator_traits_rebind<allocator_type, _Tp>::type other;}; 1535 template <class _Tp> struct rebind_traits 1536 {typedef allocator_traits<typename rebind_alloc<_Tp>::other> other;}; 1537#endif // _LIBCPP_CXX03_LANG 1538 1539 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1540 static pointer allocate(allocator_type& __a, size_type __n) 1541 {return __a.allocate(__n);} 1542 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1543 static pointer allocate(allocator_type& __a, size_type __n, const_void_pointer __hint) 1544 {return __allocate(__a, __n, __hint, 1545 __has_allocate_hint<allocator_type, size_type, const_void_pointer>());} 1546 1547 _LIBCPP_INLINE_VISIBILITY 1548 static void deallocate(allocator_type& __a, pointer __p, size_type __n) _NOEXCEPT 1549 {__a.deallocate(__p, __n);} 1550 1551#ifndef _LIBCPP_HAS_NO_VARIADICS 1552 template <class _Tp, class... _Args> 1553 _LIBCPP_INLINE_VISIBILITY 1554 static void construct(allocator_type& __a, _Tp* __p, _Args&&... __args) 1555 {__construct(__has_construct<allocator_type, _Tp*, _Args...>(), 1556 __a, __p, _VSTD::forward<_Args>(__args)...);} 1557#else // _LIBCPP_HAS_NO_VARIADICS 1558 template <class _Tp> 1559 _LIBCPP_INLINE_VISIBILITY 1560 static void construct(allocator_type&, _Tp* __p) 1561 { 1562 ::new ((void*)__p) _Tp(); 1563 } 1564 template <class _Tp, class _A0> 1565 _LIBCPP_INLINE_VISIBILITY 1566 static void construct(allocator_type& __a, _Tp* __p, const _A0& __a0) 1567 { 1568 __construct(__has_construct<allocator_type, _Tp*, const _A0&>(), 1569 __a, __p, __a0); 1570 } 1571 template <class _Tp, class _A0, class _A1> 1572 _LIBCPP_INLINE_VISIBILITY 1573 static void construct(allocator_type&, _Tp* __p, const _A0& __a0, 1574 const _A1& __a1) 1575 { 1576 ::new ((void*)__p) _Tp(__a0, __a1); 1577 } 1578 template <class _Tp, class _A0, class _A1, class _A2> 1579 _LIBCPP_INLINE_VISIBILITY 1580 static void construct(allocator_type&, _Tp* __p, const _A0& __a0, 1581 const _A1& __a1, const _A2& __a2) 1582 { 1583 ::new ((void*)__p) _Tp(__a0, __a1, __a2); 1584 } 1585#endif // _LIBCPP_HAS_NO_VARIADICS 1586 1587 template <class _Tp> 1588 _LIBCPP_INLINE_VISIBILITY 1589 static void destroy(allocator_type& __a, _Tp* __p) 1590 {__destroy(__has_destroy<allocator_type, _Tp*>(), __a, __p);} 1591 1592 _LIBCPP_INLINE_VISIBILITY 1593 static size_type max_size(const allocator_type& __a) _NOEXCEPT 1594 {return __max_size(__has_max_size<const allocator_type>(), __a);} 1595 1596 _LIBCPP_INLINE_VISIBILITY 1597 static allocator_type 1598 select_on_container_copy_construction(const allocator_type& __a) 1599 {return __select_on_container_copy_construction( 1600 __has_select_on_container_copy_construction<const allocator_type>(), 1601 __a);} 1602 1603 template <class _Ptr> 1604 _LIBCPP_INLINE_VISIBILITY 1605 static 1606 void 1607 __construct_forward_with_exception_guarantees(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) 1608 { 1609 static_assert(__is_cpp17_move_insertable<allocator_type>::value, 1610 "The specified type does not meet the requirements of Cpp17MoveInsertible"); 1611 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1612 construct(__a, _VSTD::__to_address(__begin2), 1613#ifdef _LIBCPP_NO_EXCEPTIONS 1614 _VSTD::move(*__begin1) 1615#else 1616 _VSTD::move_if_noexcept(*__begin1) 1617#endif 1618 ); 1619 } 1620 1621 template <class _Tp> 1622 _LIBCPP_INLINE_VISIBILITY 1623 static 1624 typename enable_if 1625 < 1626 (__is_default_allocator<allocator_type>::value 1627 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1628 is_trivially_move_constructible<_Tp>::value, 1629 void 1630 >::type 1631 __construct_forward_with_exception_guarantees(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) 1632 { 1633 ptrdiff_t _Np = __end1 - __begin1; 1634 if (_Np > 0) 1635 { 1636 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); 1637 __begin2 += _Np; 1638 } 1639 } 1640 1641 template <class _Iter, class _Ptr> 1642 _LIBCPP_INLINE_VISIBILITY 1643 static 1644 void 1645 __construct_range_forward(allocator_type& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) 1646 { 1647 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1648 construct(__a, _VSTD::__to_address(__begin2), *__begin1); 1649 } 1650 1651 template <class _SourceTp, class _DestTp, 1652 class _RawSourceTp = typename remove_const<_SourceTp>::type, 1653 class _RawDestTp = typename remove_const<_DestTp>::type> 1654 _LIBCPP_INLINE_VISIBILITY 1655 static 1656 typename enable_if 1657 < 1658 is_trivially_copy_constructible<_DestTp>::value && 1659 is_same<_RawSourceTp, _RawDestTp>::value && 1660 (__is_default_allocator<allocator_type>::value || 1661 !__has_construct<allocator_type, _DestTp*, _SourceTp&>::value), 1662 void 1663 >::type 1664 __construct_range_forward(allocator_type&, _SourceTp* __begin1, _SourceTp* __end1, _DestTp*& __begin2) 1665 { 1666 ptrdiff_t _Np = __end1 - __begin1; 1667 if (_Np > 0) 1668 { 1669 _VSTD::memcpy(const_cast<_RawDestTp*>(__begin2), __begin1, _Np * sizeof(_DestTp)); 1670 __begin2 += _Np; 1671 } 1672 } 1673 1674 template <class _Ptr> 1675 _LIBCPP_INLINE_VISIBILITY 1676 static 1677 void 1678 __construct_backward_with_exception_guarantees(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) 1679 { 1680 static_assert(__is_cpp17_move_insertable<allocator_type>::value, 1681 "The specified type does not meet the requirements of Cpp17MoveInsertable"); 1682 while (__end1 != __begin1) 1683 { 1684 construct(__a, _VSTD::__to_address(__end2 - 1), 1685#ifdef _LIBCPP_NO_EXCEPTIONS 1686 _VSTD::move(*--__end1) 1687#else 1688 _VSTD::move_if_noexcept(*--__end1) 1689#endif 1690 ); 1691 --__end2; 1692 } 1693 } 1694 1695 template <class _Tp> 1696 _LIBCPP_INLINE_VISIBILITY 1697 static 1698 typename enable_if 1699 < 1700 (__is_default_allocator<allocator_type>::value 1701 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1702 is_trivially_move_constructible<_Tp>::value, 1703 void 1704 >::type 1705 __construct_backward_with_exception_guarantees(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) 1706 { 1707 ptrdiff_t _Np = __end1 - __begin1; 1708 __end2 -= _Np; 1709 if (_Np > 0) 1710 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); 1711 } 1712 1713private: 1714 1715 _LIBCPP_INLINE_VISIBILITY 1716 static pointer __allocate(allocator_type& __a, size_type __n, 1717 const_void_pointer __hint, true_type) 1718 { 1719 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1720 return __a.allocate(__n, __hint); 1721 _LIBCPP_SUPPRESS_DEPRECATED_POP 1722 } 1723 _LIBCPP_INLINE_VISIBILITY 1724 static pointer __allocate(allocator_type& __a, size_type __n, 1725 const_void_pointer, false_type) 1726 {return __a.allocate(__n);} 1727 1728#ifndef _LIBCPP_HAS_NO_VARIADICS 1729 template <class _Tp, class... _Args> 1730 _LIBCPP_INLINE_VISIBILITY 1731 static void __construct(true_type, allocator_type& __a, _Tp* __p, _Args&&... __args) 1732 { 1733 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1734 __a.construct(__p, _VSTD::forward<_Args>(__args)...); 1735 _LIBCPP_SUPPRESS_DEPRECATED_POP 1736 } 1737 1738 template <class _Tp, class... _Args> 1739 _LIBCPP_INLINE_VISIBILITY 1740 static void __construct(false_type, allocator_type&, _Tp* __p, _Args&&... __args) 1741 { 1742 ::new ((void*)__p) _Tp(_VSTD::forward<_Args>(__args)...); 1743 } 1744#else // _LIBCPP_HAS_NO_VARIADICS 1745 template <class _Tp, class _A0> 1746 _LIBCPP_INLINE_VISIBILITY 1747 static void __construct(true_type, allocator_type& __a, _Tp* __p, 1748 const _A0& __a0) 1749 {__a.construct(__p, __a0);} 1750 template <class _Tp, class _A0> 1751 _LIBCPP_INLINE_VISIBILITY 1752 static void __construct(false_type, allocator_type&, _Tp* __p, 1753 const _A0& __a0) 1754 { 1755 ::new ((void*)__p) _Tp(__a0); 1756 } 1757#endif // _LIBCPP_HAS_NO_VARIADICS 1758 1759 template <class _Tp> 1760 _LIBCPP_INLINE_VISIBILITY 1761 static void __destroy(true_type, allocator_type& __a, _Tp* __p) 1762 { 1763 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1764 __a.destroy(__p); 1765 _LIBCPP_SUPPRESS_DEPRECATED_POP 1766 } 1767 template <class _Tp> 1768 _LIBCPP_INLINE_VISIBILITY 1769 static void __destroy(false_type, allocator_type&, _Tp* __p) 1770 { 1771 __p->~_Tp(); 1772 } 1773 1774 _LIBCPP_INLINE_VISIBILITY 1775 static size_type __max_size(true_type, const allocator_type& __a) _NOEXCEPT 1776 { 1777 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1778 return __a.max_size(); 1779 _LIBCPP_SUPPRESS_DEPRECATED_POP 1780 } 1781 1782 _LIBCPP_INLINE_VISIBILITY 1783 static size_type __max_size(false_type, const allocator_type&) _NOEXCEPT 1784 {return numeric_limits<size_type>::max() / sizeof(value_type);} 1785 1786 _LIBCPP_INLINE_VISIBILITY 1787 static allocator_type 1788 __select_on_container_copy_construction(true_type, const allocator_type& __a) 1789 {return __a.select_on_container_copy_construction();} 1790 _LIBCPP_INLINE_VISIBILITY 1791 static allocator_type 1792 __select_on_container_copy_construction(false_type, const allocator_type& __a) 1793 {return __a;} 1794}; 1795 1796template <class _Traits, class _Tp> 1797struct __rebind_alloc_helper 1798{ 1799#ifndef _LIBCPP_CXX03_LANG 1800 typedef _LIBCPP_NODEBUG_TYPE typename _Traits::template rebind_alloc<_Tp> type; 1801#else 1802 typedef typename _Traits::template rebind_alloc<_Tp>::other type; 1803#endif 1804}; 1805 1806// allocator 1807 1808template <class _Tp> 1809class _LIBCPP_TEMPLATE_VIS allocator 1810{ 1811public: 1812#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1813 _LIBCPP_DEPRECATED_IN_CXX17 typedef size_t size_type; 1814 _LIBCPP_DEPRECATED_IN_CXX17 typedef ptrdiff_t difference_type; 1815 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp* pointer; 1816 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 1817 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp& reference; 1818 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 1819 1820 template <class _Up> struct _LIBCPP_DEPRECATED_IN_CXX17 rebind {typedef allocator<_Up> other;}; 1821#endif 1822 1823 typedef _Tp value_type; 1824 1825 typedef true_type propagate_on_container_move_assignment; 1826 typedef true_type is_always_equal; 1827 1828 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1829 allocator() _NOEXCEPT {} 1830 1831 template <class _Up> 1832 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1833 allocator(const allocator<_Up>&) _NOEXCEPT {} 1834 1835#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1836 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1837 pointer address(reference __x) const _NOEXCEPT 1838 {return _VSTD::addressof(__x);} 1839 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1840 const_pointer address(const_reference __x) const _NOEXCEPT 1841 {return _VSTD::addressof(__x);} 1842#endif 1843 1844 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _Tp* allocate(size_t __n) 1845 { 1846 // TODO(mpark): Replace with `allocator_traits<allocator>::max_size(*this)`. 1847 if (__n > (size_t(~0) / sizeof(_Tp))) 1848 __throw_length_error("allocator<T>::allocate(size_t n)" 1849 " 'n' exceeds maximum supported size"); 1850 return static_cast<_Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1851 } 1852 1853#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1854 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 1855 _Tp* allocate(size_t __n, const void*) { return allocate(__n); } 1856#endif 1857 1858 _LIBCPP_INLINE_VISIBILITY void deallocate(_Tp* __p, size_t __n) _NOEXCEPT 1859 {_VSTD::__libcpp_deallocate((void*)__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));} 1860 1861#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1862 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1863 {return size_type(~0) / sizeof(_Tp);} 1864 1865 template <class _Up, class... _Args> 1866 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1867 void 1868 construct(_Up* __p, _Args&&... __args) 1869 { 1870 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1871 } 1872 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1873#endif 1874}; 1875 1876template <class _Tp> 1877class _LIBCPP_TEMPLATE_VIS allocator<const _Tp> 1878{ 1879public: 1880#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1881 _LIBCPP_DEPRECATED_IN_CXX17 typedef size_t size_type; 1882 _LIBCPP_DEPRECATED_IN_CXX17 typedef ptrdiff_t difference_type; 1883 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* pointer; 1884 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 1885 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& reference; 1886 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 1887 1888 template <class _Up> struct _LIBCPP_DEPRECATED_IN_CXX17 rebind {typedef allocator<_Up> other;}; 1889#endif 1890 1891 typedef const _Tp value_type; 1892 1893 typedef true_type propagate_on_container_move_assignment; 1894 typedef true_type is_always_equal; 1895 1896 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1897 allocator() _NOEXCEPT {} 1898 1899 template <class _Up> 1900 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1901 allocator(const allocator<_Up>&) _NOEXCEPT {} 1902 1903#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1904 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1905 const_pointer address(const_reference __x) const _NOEXCEPT 1906 {return _VSTD::addressof(__x);} 1907#endif 1908 1909 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY const _Tp* allocate(size_t __n) 1910 { 1911 // TODO(mpark): Replace with `allocator_traits<allocator>::max_size(*this)`. 1912 if (__n > (size_t(~0) / sizeof(_Tp))) 1913 __throw_length_error("allocator<const T>::allocate(size_t n)" 1914 " 'n' exceeds maximum supported size"); 1915 return static_cast<const _Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1916 } 1917 1918#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1919 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 1920 const _Tp* allocate(size_t __n, const void*) { return allocate(__n); } 1921#endif 1922 1923 _LIBCPP_INLINE_VISIBILITY void deallocate(const _Tp* __p, size_t __n) 1924 {_VSTD::__libcpp_deallocate((void*) const_cast<_Tp *>(__p), __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));} 1925 1926#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1927 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1928 {return size_type(~0) / sizeof(_Tp);} 1929 1930#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1931 template <class _Up, class... _Args> 1932 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1933 void 1934 construct(_Up* __p, _Args&&... __args) 1935 { 1936 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1937 } 1938#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1939 _LIBCPP_INLINE_VISIBILITY 1940 void 1941 construct(pointer __p) 1942 { 1943 ::new((void*) const_cast<_Tp *>(__p)) _Tp(); 1944 } 1945# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1946 1947 template <class _A0> 1948 _LIBCPP_INLINE_VISIBILITY 1949 void 1950 construct(pointer __p, _A0& __a0) 1951 { 1952 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0); 1953 } 1954 template <class _A0> 1955 _LIBCPP_INLINE_VISIBILITY 1956 void 1957 construct(pointer __p, const _A0& __a0) 1958 { 1959 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0); 1960 } 1961# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1962 template <class _A0, class _A1> 1963 _LIBCPP_INLINE_VISIBILITY 1964 void 1965 construct(pointer __p, _A0& __a0, _A1& __a1) 1966 { 1967 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1968 } 1969 template <class _A0, class _A1> 1970 _LIBCPP_INLINE_VISIBILITY 1971 void 1972 construct(pointer __p, const _A0& __a0, _A1& __a1) 1973 { 1974 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1975 } 1976 template <class _A0, class _A1> 1977 _LIBCPP_INLINE_VISIBILITY 1978 void 1979 construct(pointer __p, _A0& __a0, const _A1& __a1) 1980 { 1981 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1982 } 1983 template <class _A0, class _A1> 1984 _LIBCPP_INLINE_VISIBILITY 1985 void 1986 construct(pointer __p, const _A0& __a0, const _A1& __a1) 1987 { 1988 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1989 } 1990#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1991 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1992#endif 1993}; 1994 1995template <class _Tp, class _Up> 1996inline _LIBCPP_INLINE_VISIBILITY 1997bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;} 1998 1999template <class _Tp, class _Up> 2000inline _LIBCPP_INLINE_VISIBILITY 2001bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;} 2002 2003template <class _OutputIterator, class _Tp> 2004class _LIBCPP_TEMPLATE_VIS raw_storage_iterator 2005 : public iterator<output_iterator_tag, 2006 _Tp, // purposefully not C++03 2007 ptrdiff_t, // purposefully not C++03 2008 _Tp*, // purposefully not C++03 2009 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03 2010{ 2011private: 2012 _OutputIterator __x_; 2013public: 2014 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {} 2015 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;} 2016 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element) 2017 {::new(_VSTD::addressof(*__x_)) _Tp(__element); return *this;} 2018#if _LIBCPP_STD_VER >= 14 2019 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element) 2020 {::new(_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;} 2021#endif 2022 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;} 2023 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int) 2024 {raw_storage_iterator __t(*this); ++__x_; return __t;} 2025#if _LIBCPP_STD_VER >= 14 2026 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; } 2027#endif 2028}; 2029 2030template <class _Tp> 2031_LIBCPP_NODISCARD_EXT _LIBCPP_NO_CFI 2032pair<_Tp*, ptrdiff_t> 2033get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT 2034{ 2035 pair<_Tp*, ptrdiff_t> __r(0, 0); 2036 const ptrdiff_t __m = (~ptrdiff_t(0) ^ 2037 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1))) 2038 / sizeof(_Tp); 2039 if (__n > __m) 2040 __n = __m; 2041 while (__n > 0) 2042 { 2043#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) 2044 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 2045 { 2046 std::align_val_t __al = 2047 std::align_val_t(std::alignment_of<_Tp>::value); 2048 __r.first = static_cast<_Tp*>(::operator new( 2049 __n * sizeof(_Tp), __al, nothrow)); 2050 } else { 2051 __r.first = static_cast<_Tp*>(::operator new( 2052 __n * sizeof(_Tp), nothrow)); 2053 } 2054#else 2055 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 2056 { 2057 // Since aligned operator new is unavailable, return an empty 2058 // buffer rather than one with invalid alignment. 2059 return __r; 2060 } 2061 2062 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow)); 2063#endif 2064 2065 if (__r.first) 2066 { 2067 __r.second = __n; 2068 break; 2069 } 2070 __n /= 2; 2071 } 2072 return __r; 2073} 2074 2075template <class _Tp> 2076inline _LIBCPP_INLINE_VISIBILITY 2077void return_temporary_buffer(_Tp* __p) _NOEXCEPT 2078{ 2079 _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp)); 2080} 2081 2082#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2083template <class _Tp> 2084struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref 2085{ 2086 _Tp* __ptr_; 2087}; 2088 2089template<class _Tp> 2090class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr 2091{ 2092private: 2093 _Tp* __ptr_; 2094public: 2095 typedef _Tp element_type; 2096 2097 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} 2098 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} 2099 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT 2100 : __ptr_(__p.release()) {} 2101 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT 2102 {reset(__p.release()); return *this;} 2103 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT 2104 {reset(__p.release()); return *this;} 2105 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT 2106 {reset(__p.__ptr_); return *this;} 2107 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() _NOEXCEPT {delete __ptr_;} 2108 2109 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const _NOEXCEPT 2110 {return *__ptr_;} 2111 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const _NOEXCEPT {return __ptr_;} 2112 _LIBCPP_INLINE_VISIBILITY _Tp* get() const _NOEXCEPT {return __ptr_;} 2113 _LIBCPP_INLINE_VISIBILITY _Tp* release() _NOEXCEPT 2114 { 2115 _Tp* __t = __ptr_; 2116 __ptr_ = 0; 2117 return __t; 2118 } 2119 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) _NOEXCEPT 2120 { 2121 if (__ptr_ != __p) 2122 delete __ptr_; 2123 __ptr_ = __p; 2124 } 2125 2126 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} 2127 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() _NOEXCEPT 2128 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 2129 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() _NOEXCEPT 2130 {return auto_ptr<_Up>(release());} 2131}; 2132 2133template <> 2134class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> 2135{ 2136public: 2137 typedef void element_type; 2138}; 2139#endif 2140 2141// Tag used to default initialize one or both of the pair's elements. 2142struct __default_init_tag {}; 2143struct __value_init_tag {}; 2144 2145template <class _Tp, int _Idx, 2146 bool _CanBeEmptyBase = 2147 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value> 2148struct __compressed_pair_elem { 2149 typedef _Tp _ParamT; 2150 typedef _Tp& reference; 2151 typedef const _Tp& const_reference; 2152 2153 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2154 __compressed_pair_elem(__default_init_tag) {} 2155 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2156 __compressed_pair_elem(__value_init_tag) : __value_() {} 2157 2158 template <class _Up, class = typename enable_if< 2159 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2160 >::type> 2161 _LIBCPP_INLINE_VISIBILITY 2162 _LIBCPP_CONSTEXPR explicit 2163 __compressed_pair_elem(_Up&& __u) 2164 : __value_(_VSTD::forward<_Up>(__u)) 2165 { 2166 } 2167 2168 2169#ifndef _LIBCPP_CXX03_LANG 2170 template <class... _Args, size_t... _Indexes> 2171 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2172 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2173 __tuple_indices<_Indexes...>) 2174 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2175#endif 2176 2177 2178 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; } 2179 _LIBCPP_INLINE_VISIBILITY 2180 const_reference __get() const _NOEXCEPT { return __value_; } 2181 2182private: 2183 _Tp __value_; 2184}; 2185 2186template <class _Tp, int _Idx> 2187struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { 2188 typedef _Tp _ParamT; 2189 typedef _Tp& reference; 2190 typedef const _Tp& const_reference; 2191 typedef _Tp __value_type; 2192 2193 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __compressed_pair_elem() = default; 2194 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2195 __compressed_pair_elem(__default_init_tag) {} 2196 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2197 __compressed_pair_elem(__value_init_tag) : __value_type() {} 2198 2199 template <class _Up, class = typename enable_if< 2200 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2201 >::type> 2202 _LIBCPP_INLINE_VISIBILITY 2203 _LIBCPP_CONSTEXPR explicit 2204 __compressed_pair_elem(_Up&& __u) 2205 : __value_type(_VSTD::forward<_Up>(__u)) 2206 {} 2207 2208#ifndef _LIBCPP_CXX03_LANG 2209 template <class... _Args, size_t... _Indexes> 2210 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2211 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2212 __tuple_indices<_Indexes...>) 2213 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2214#endif 2215 2216 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; } 2217 _LIBCPP_INLINE_VISIBILITY 2218 const_reference __get() const _NOEXCEPT { return *this; } 2219}; 2220 2221template <class _T1, class _T2> 2222class __compressed_pair : private __compressed_pair_elem<_T1, 0>, 2223 private __compressed_pair_elem<_T2, 1> { 2224 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T1, 0> _Base1; 2225 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T2, 1> _Base2; 2226 2227 // NOTE: This static assert should never fire because __compressed_pair 2228 // is *almost never* used in a scenario where it's possible for T1 == T2. 2229 // (The exception is std::function where it is possible that the function 2230 // object and the allocator have the same type). 2231 static_assert((!is_same<_T1, _T2>::value), 2232 "__compressed_pair cannot be instantated when T1 and T2 are the same type; " 2233 "The current implementation is NOT ABI-compatible with the previous " 2234 "implementation for this configuration"); 2235 2236public: 2237 template <bool _Dummy = true, 2238 class = typename enable_if< 2239 __dependent_type<is_default_constructible<_T1>, _Dummy>::value && 2240 __dependent_type<is_default_constructible<_T2>, _Dummy>::value 2241 >::type 2242 > 2243 _LIBCPP_INLINE_VISIBILITY 2244 _LIBCPP_CONSTEXPR __compressed_pair() : _Base1(__value_init_tag()), _Base2(__value_init_tag()) {} 2245 2246 template <class _U1, class _U2> 2247 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2248 __compressed_pair(_U1&& __t1, _U2&& __t2) 2249 : _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {} 2250 2251#ifndef _LIBCPP_CXX03_LANG 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#endif 2261 2262 _LIBCPP_INLINE_VISIBILITY 2263 typename _Base1::reference first() _NOEXCEPT { 2264 return static_cast<_Base1&>(*this).__get(); 2265 } 2266 2267 _LIBCPP_INLINE_VISIBILITY 2268 typename _Base1::const_reference first() const _NOEXCEPT { 2269 return static_cast<_Base1 const&>(*this).__get(); 2270 } 2271 2272 _LIBCPP_INLINE_VISIBILITY 2273 typename _Base2::reference second() _NOEXCEPT { 2274 return static_cast<_Base2&>(*this).__get(); 2275 } 2276 2277 _LIBCPP_INLINE_VISIBILITY 2278 typename _Base2::const_reference second() const _NOEXCEPT { 2279 return static_cast<_Base2 const&>(*this).__get(); 2280 } 2281 2282 _LIBCPP_INLINE_VISIBILITY 2283 void swap(__compressed_pair& __x) 2284 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2285 __is_nothrow_swappable<_T2>::value) 2286 { 2287 using std::swap; 2288 swap(first(), __x.first()); 2289 swap(second(), __x.second()); 2290 } 2291}; 2292 2293template <class _T1, class _T2> 2294inline _LIBCPP_INLINE_VISIBILITY 2295void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) 2296 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2297 __is_nothrow_swappable<_T2>::value) { 2298 __x.swap(__y); 2299} 2300 2301// default_delete 2302 2303template <class _Tp> 2304struct _LIBCPP_TEMPLATE_VIS default_delete { 2305 static_assert(!is_function<_Tp>::value, 2306 "default_delete cannot be instantiated for function types"); 2307#ifndef _LIBCPP_CXX03_LANG 2308 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 2309#else 2310 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2311#endif 2312 template <class _Up> 2313 _LIBCPP_INLINE_VISIBILITY 2314 default_delete(const default_delete<_Up>&, 2315 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 2316 0) _NOEXCEPT {} 2317 2318 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 2319 static_assert(sizeof(_Tp) > 0, 2320 "default_delete can not delete incomplete type"); 2321 static_assert(!is_void<_Tp>::value, 2322 "default_delete can not delete incomplete type"); 2323 delete __ptr; 2324 } 2325}; 2326 2327template <class _Tp> 2328struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 2329private: 2330 template <class _Up> 2331 struct _EnableIfConvertible 2332 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 2333 2334public: 2335#ifndef _LIBCPP_CXX03_LANG 2336 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 2337#else 2338 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2339#endif 2340 2341 template <class _Up> 2342 _LIBCPP_INLINE_VISIBILITY 2343 default_delete(const default_delete<_Up[]>&, 2344 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 2345 2346 template <class _Up> 2347 _LIBCPP_INLINE_VISIBILITY 2348 typename _EnableIfConvertible<_Up>::type 2349 operator()(_Up* __ptr) const _NOEXCEPT { 2350 static_assert(sizeof(_Tp) > 0, 2351 "default_delete can not delete incomplete type"); 2352 static_assert(!is_void<_Tp>::value, 2353 "default_delete can not delete void type"); 2354 delete[] __ptr; 2355 } 2356}; 2357 2358template <class _Deleter> 2359struct __unique_ptr_deleter_sfinae { 2360 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 2361 typedef const _Deleter& __lval_ref_type; 2362 typedef _Deleter&& __good_rval_ref_type; 2363 typedef true_type __enable_rval_overload; 2364}; 2365 2366template <class _Deleter> 2367struct __unique_ptr_deleter_sfinae<_Deleter const&> { 2368 typedef const _Deleter& __lval_ref_type; 2369 typedef const _Deleter&& __bad_rval_ref_type; 2370 typedef false_type __enable_rval_overload; 2371}; 2372 2373template <class _Deleter> 2374struct __unique_ptr_deleter_sfinae<_Deleter&> { 2375 typedef _Deleter& __lval_ref_type; 2376 typedef _Deleter&& __bad_rval_ref_type; 2377 typedef false_type __enable_rval_overload; 2378}; 2379 2380template <class _Tp, class _Dp = default_delete<_Tp> > 2381class _LIBCPP_TEMPLATE_VIS unique_ptr { 2382public: 2383 typedef _Tp element_type; 2384 typedef _Dp deleter_type; 2385 typedef _LIBCPP_NODEBUG_TYPE typename __pointer_type<_Tp, deleter_type>::type pointer; 2386 2387 static_assert(!is_rvalue_reference<deleter_type>::value, 2388 "the specified deleter type cannot be an rvalue reference"); 2389 2390private: 2391 __compressed_pair<pointer, deleter_type> __ptr_; 2392 2393 struct __nat { int __for_bool_; }; 2394 2395 typedef _LIBCPP_NODEBUG_TYPE __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2396 2397 template <bool _Dummy> 2398 using _LValRefType _LIBCPP_NODEBUG_TYPE = 2399 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2400 2401 template <bool _Dummy> 2402 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 2403 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2404 2405 template <bool _Dummy> 2406 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 2407 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2408 2409 template <bool _Dummy, class _Deleter = typename __dependent_type< 2410 __identity<deleter_type>, _Dummy>::type> 2411 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 2412 typename enable_if<is_default_constructible<_Deleter>::value && 2413 !is_pointer<_Deleter>::value>::type; 2414 2415 template <class _ArgType> 2416 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 2417 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2418 2419 template <class _UPtr, class _Up> 2420 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2421 is_convertible<typename _UPtr::pointer, pointer>::value && 2422 !is_array<_Up>::value 2423 >::type; 2424 2425 template <class _UDel> 2426 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2427 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2428 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2429 >::type; 2430 2431 template <class _UDel> 2432 using _EnableIfDeleterAssignable = typename enable_if< 2433 is_assignable<_Dp&, _UDel&&>::value 2434 >::type; 2435 2436public: 2437 template <bool _Dummy = true, 2438 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2439 _LIBCPP_INLINE_VISIBILITY 2440 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2441 2442 template <bool _Dummy = true, 2443 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2444 _LIBCPP_INLINE_VISIBILITY 2445 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2446 2447 template <bool _Dummy = true, 2448 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2449 _LIBCPP_INLINE_VISIBILITY 2450 explicit unique_ptr(pointer __p) _NOEXCEPT : __ptr_(__p, __default_init_tag()) {} 2451 2452 template <bool _Dummy = true, 2453 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 2454 _LIBCPP_INLINE_VISIBILITY 2455 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) _NOEXCEPT 2456 : __ptr_(__p, __d) {} 2457 2458 template <bool _Dummy = true, 2459 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 2460 _LIBCPP_INLINE_VISIBILITY 2461 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2462 : __ptr_(__p, _VSTD::move(__d)) { 2463 static_assert(!is_reference<deleter_type>::value, 2464 "rvalue deleter bound to reference"); 2465 } 2466 2467 template <bool _Dummy = true, 2468 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> > > 2469 _LIBCPP_INLINE_VISIBILITY 2470 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 2471 2472 _LIBCPP_INLINE_VISIBILITY 2473 unique_ptr(unique_ptr&& __u) _NOEXCEPT 2474 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2475 } 2476 2477 template <class _Up, class _Ep, 2478 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2479 class = _EnableIfDeleterConvertible<_Ep> 2480 > 2481 _LIBCPP_INLINE_VISIBILITY 2482 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2483 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 2484 2485#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2486 template <class _Up> 2487 _LIBCPP_INLINE_VISIBILITY 2488 unique_ptr(auto_ptr<_Up>&& __p, 2489 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2490 is_same<_Dp, default_delete<_Tp> >::value, 2491 __nat>::type = __nat()) _NOEXCEPT 2492 : __ptr_(__p.release(), __default_init_tag()) {} 2493#endif 2494 2495 _LIBCPP_INLINE_VISIBILITY 2496 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2497 reset(__u.release()); 2498 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2499 return *this; 2500 } 2501 2502 template <class _Up, class _Ep, 2503 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2504 class = _EnableIfDeleterAssignable<_Ep> 2505 > 2506 _LIBCPP_INLINE_VISIBILITY 2507 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2508 reset(__u.release()); 2509 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2510 return *this; 2511 } 2512 2513#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2514 template <class _Up> 2515 _LIBCPP_INLINE_VISIBILITY 2516 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2517 is_same<_Dp, default_delete<_Tp> >::value, 2518 unique_ptr&>::type 2519 operator=(auto_ptr<_Up> __p) { 2520 reset(__p.release()); 2521 return *this; 2522 } 2523#endif 2524 2525#ifdef _LIBCPP_CXX03_LANG 2526 unique_ptr(unique_ptr const&) = delete; 2527 unique_ptr& operator=(unique_ptr const&) = delete; 2528#endif 2529 2530 2531 _LIBCPP_INLINE_VISIBILITY 2532 ~unique_ptr() { reset(); } 2533 2534 _LIBCPP_INLINE_VISIBILITY 2535 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2536 reset(); 2537 return *this; 2538 } 2539 2540 _LIBCPP_INLINE_VISIBILITY 2541 typename add_lvalue_reference<_Tp>::type 2542 operator*() const { 2543 return *__ptr_.first(); 2544 } 2545 _LIBCPP_INLINE_VISIBILITY 2546 pointer operator->() const _NOEXCEPT { 2547 return __ptr_.first(); 2548 } 2549 _LIBCPP_INLINE_VISIBILITY 2550 pointer get() const _NOEXCEPT { 2551 return __ptr_.first(); 2552 } 2553 _LIBCPP_INLINE_VISIBILITY 2554 deleter_type& get_deleter() _NOEXCEPT { 2555 return __ptr_.second(); 2556 } 2557 _LIBCPP_INLINE_VISIBILITY 2558 const deleter_type& get_deleter() const _NOEXCEPT { 2559 return __ptr_.second(); 2560 } 2561 _LIBCPP_INLINE_VISIBILITY 2562 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2563 return __ptr_.first() != nullptr; 2564 } 2565 2566 _LIBCPP_INLINE_VISIBILITY 2567 pointer release() _NOEXCEPT { 2568 pointer __t = __ptr_.first(); 2569 __ptr_.first() = pointer(); 2570 return __t; 2571 } 2572 2573 _LIBCPP_INLINE_VISIBILITY 2574 void reset(pointer __p = pointer()) _NOEXCEPT { 2575 pointer __tmp = __ptr_.first(); 2576 __ptr_.first() = __p; 2577 if (__tmp) 2578 __ptr_.second()(__tmp); 2579 } 2580 2581 _LIBCPP_INLINE_VISIBILITY 2582 void swap(unique_ptr& __u) _NOEXCEPT { 2583 __ptr_.swap(__u.__ptr_); 2584 } 2585}; 2586 2587 2588template <class _Tp, class _Dp> 2589class _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 2590public: 2591 typedef _Tp element_type; 2592 typedef _Dp deleter_type; 2593 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2594 2595private: 2596 __compressed_pair<pointer, deleter_type> __ptr_; 2597 2598 template <class _From> 2599 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 2600 2601 template <class _FromElem> 2602 struct _CheckArrayPointerConversion<_FromElem*> 2603 : integral_constant<bool, 2604 is_same<_FromElem*, pointer>::value || 2605 (is_same<pointer, element_type*>::value && 2606 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 2607 > 2608 {}; 2609 2610 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2611 2612 template <bool _Dummy> 2613 using _LValRefType _LIBCPP_NODEBUG_TYPE = 2614 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2615 2616 template <bool _Dummy> 2617 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 2618 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2619 2620 template <bool _Dummy> 2621 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 2622 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2623 2624 template <bool _Dummy, class _Deleter = typename __dependent_type< 2625 __identity<deleter_type>, _Dummy>::type> 2626 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 2627 typename enable_if<is_default_constructible<_Deleter>::value && 2628 !is_pointer<_Deleter>::value>::type; 2629 2630 template <class _ArgType> 2631 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 2632 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2633 2634 template <class _Pp> 2635 using _EnableIfPointerConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2636 _CheckArrayPointerConversion<_Pp>::value 2637 >::type; 2638 2639 template <class _UPtr, class _Up, 2640 class _ElemT = typename _UPtr::element_type> 2641 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2642 is_array<_Up>::value && 2643 is_same<pointer, element_type*>::value && 2644 is_same<typename _UPtr::pointer, _ElemT*>::value && 2645 is_convertible<_ElemT(*)[], element_type(*)[]>::value 2646 >::type; 2647 2648 template <class _UDel> 2649 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2650 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2651 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2652 >::type; 2653 2654 template <class _UDel> 2655 using _EnableIfDeleterAssignable _LIBCPP_NODEBUG_TYPE = typename enable_if< 2656 is_assignable<_Dp&, _UDel&&>::value 2657 >::type; 2658 2659public: 2660 template <bool _Dummy = true, 2661 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2662 _LIBCPP_INLINE_VISIBILITY 2663 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2664 2665 template <bool _Dummy = true, 2666 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2667 _LIBCPP_INLINE_VISIBILITY 2668 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2669 2670 template <class _Pp, bool _Dummy = true, 2671 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 2672 class = _EnableIfPointerConvertible<_Pp> > 2673 _LIBCPP_INLINE_VISIBILITY 2674 explicit unique_ptr(_Pp __p) _NOEXCEPT 2675 : __ptr_(__p, __default_init_tag()) {} 2676 2677 template <class _Pp, bool _Dummy = true, 2678 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> >, 2679 class = _EnableIfPointerConvertible<_Pp> > 2680 _LIBCPP_INLINE_VISIBILITY 2681 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) _NOEXCEPT 2682 : __ptr_(__p, __d) {} 2683 2684 template <bool _Dummy = true, 2685 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 2686 _LIBCPP_INLINE_VISIBILITY 2687 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) _NOEXCEPT 2688 : __ptr_(nullptr, __d) {} 2689 2690 template <class _Pp, bool _Dummy = true, 2691 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> >, 2692 class = _EnableIfPointerConvertible<_Pp> > 2693 _LIBCPP_INLINE_VISIBILITY 2694 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2695 : __ptr_(__p, _VSTD::move(__d)) { 2696 static_assert(!is_reference<deleter_type>::value, 2697 "rvalue deleter bound to reference"); 2698 } 2699 2700 template <bool _Dummy = true, 2701 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 2702 _LIBCPP_INLINE_VISIBILITY 2703 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2704 : __ptr_(nullptr, _VSTD::move(__d)) { 2705 static_assert(!is_reference<deleter_type>::value, 2706 "rvalue deleter bound to reference"); 2707 } 2708 2709 template <class _Pp, bool _Dummy = true, 2710 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> >, 2711 class = _EnableIfPointerConvertible<_Pp> > 2712 _LIBCPP_INLINE_VISIBILITY 2713 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 2714 2715 _LIBCPP_INLINE_VISIBILITY 2716 unique_ptr(unique_ptr&& __u) _NOEXCEPT 2717 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2718 } 2719 2720 _LIBCPP_INLINE_VISIBILITY 2721 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2722 reset(__u.release()); 2723 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2724 return *this; 2725 } 2726 2727 template <class _Up, class _Ep, 2728 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2729 class = _EnableIfDeleterConvertible<_Ep> 2730 > 2731 _LIBCPP_INLINE_VISIBILITY 2732 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2733 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 2734 } 2735 2736 template <class _Up, class _Ep, 2737 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2738 class = _EnableIfDeleterAssignable<_Ep> 2739 > 2740 _LIBCPP_INLINE_VISIBILITY 2741 unique_ptr& 2742 operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2743 reset(__u.release()); 2744 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2745 return *this; 2746 } 2747 2748#ifdef _LIBCPP_CXX03_LANG 2749 unique_ptr(unique_ptr const&) = delete; 2750 unique_ptr& operator=(unique_ptr const&) = delete; 2751#endif 2752 2753public: 2754 _LIBCPP_INLINE_VISIBILITY 2755 ~unique_ptr() { reset(); } 2756 2757 _LIBCPP_INLINE_VISIBILITY 2758 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2759 reset(); 2760 return *this; 2761 } 2762 2763 _LIBCPP_INLINE_VISIBILITY 2764 typename add_lvalue_reference<_Tp>::type 2765 operator[](size_t __i) const { 2766 return __ptr_.first()[__i]; 2767 } 2768 _LIBCPP_INLINE_VISIBILITY 2769 pointer get() const _NOEXCEPT { 2770 return __ptr_.first(); 2771 } 2772 2773 _LIBCPP_INLINE_VISIBILITY 2774 deleter_type& get_deleter() _NOEXCEPT { 2775 return __ptr_.second(); 2776 } 2777 2778 _LIBCPP_INLINE_VISIBILITY 2779 const deleter_type& get_deleter() const _NOEXCEPT { 2780 return __ptr_.second(); 2781 } 2782 _LIBCPP_INLINE_VISIBILITY 2783 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2784 return __ptr_.first() != nullptr; 2785 } 2786 2787 _LIBCPP_INLINE_VISIBILITY 2788 pointer release() _NOEXCEPT { 2789 pointer __t = __ptr_.first(); 2790 __ptr_.first() = pointer(); 2791 return __t; 2792 } 2793 2794 template <class _Pp> 2795 _LIBCPP_INLINE_VISIBILITY 2796 typename enable_if< 2797 _CheckArrayPointerConversion<_Pp>::value 2798 >::type 2799 reset(_Pp __p) _NOEXCEPT { 2800 pointer __tmp = __ptr_.first(); 2801 __ptr_.first() = __p; 2802 if (__tmp) 2803 __ptr_.second()(__tmp); 2804 } 2805 2806 _LIBCPP_INLINE_VISIBILITY 2807 void reset(nullptr_t = nullptr) _NOEXCEPT { 2808 pointer __tmp = __ptr_.first(); 2809 __ptr_.first() = nullptr; 2810 if (__tmp) 2811 __ptr_.second()(__tmp); 2812 } 2813 2814 _LIBCPP_INLINE_VISIBILITY 2815 void swap(unique_ptr& __u) _NOEXCEPT { 2816 __ptr_.swap(__u.__ptr_); 2817 } 2818 2819}; 2820 2821template <class _Tp, class _Dp> 2822inline _LIBCPP_INLINE_VISIBILITY 2823typename enable_if< 2824 __is_swappable<_Dp>::value, 2825 void 2826>::type 2827swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 2828 2829template <class _T1, class _D1, class _T2, class _D2> 2830inline _LIBCPP_INLINE_VISIBILITY 2831bool 2832operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 2833 2834template <class _T1, class _D1, class _T2, class _D2> 2835inline _LIBCPP_INLINE_VISIBILITY 2836bool 2837operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 2838 2839template <class _T1, class _D1, class _T2, class _D2> 2840inline _LIBCPP_INLINE_VISIBILITY 2841bool 2842operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 2843{ 2844 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2845 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 2846 typedef typename common_type<_P1, _P2>::type _Vp; 2847 return less<_Vp>()(__x.get(), __y.get()); 2848} 2849 2850template <class _T1, class _D1, class _T2, class _D2> 2851inline _LIBCPP_INLINE_VISIBILITY 2852bool 2853operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 2854 2855template <class _T1, class _D1, class _T2, class _D2> 2856inline _LIBCPP_INLINE_VISIBILITY 2857bool 2858operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 2859 2860template <class _T1, class _D1, class _T2, class _D2> 2861inline _LIBCPP_INLINE_VISIBILITY 2862bool 2863operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 2864 2865template <class _T1, class _D1> 2866inline _LIBCPP_INLINE_VISIBILITY 2867bool 2868operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2869{ 2870 return !__x; 2871} 2872 2873template <class _T1, class _D1> 2874inline _LIBCPP_INLINE_VISIBILITY 2875bool 2876operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2877{ 2878 return !__x; 2879} 2880 2881template <class _T1, class _D1> 2882inline _LIBCPP_INLINE_VISIBILITY 2883bool 2884operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2885{ 2886 return static_cast<bool>(__x); 2887} 2888 2889template <class _T1, class _D1> 2890inline _LIBCPP_INLINE_VISIBILITY 2891bool 2892operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2893{ 2894 return static_cast<bool>(__x); 2895} 2896 2897template <class _T1, class _D1> 2898inline _LIBCPP_INLINE_VISIBILITY 2899bool 2900operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2901{ 2902 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2903 return less<_P1>()(__x.get(), nullptr); 2904} 2905 2906template <class _T1, class _D1> 2907inline _LIBCPP_INLINE_VISIBILITY 2908bool 2909operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2910{ 2911 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2912 return less<_P1>()(nullptr, __x.get()); 2913} 2914 2915template <class _T1, class _D1> 2916inline _LIBCPP_INLINE_VISIBILITY 2917bool 2918operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2919{ 2920 return nullptr < __x; 2921} 2922 2923template <class _T1, class _D1> 2924inline _LIBCPP_INLINE_VISIBILITY 2925bool 2926operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2927{ 2928 return __x < nullptr; 2929} 2930 2931template <class _T1, class _D1> 2932inline _LIBCPP_INLINE_VISIBILITY 2933bool 2934operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2935{ 2936 return !(nullptr < __x); 2937} 2938 2939template <class _T1, class _D1> 2940inline _LIBCPP_INLINE_VISIBILITY 2941bool 2942operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2943{ 2944 return !(__x < nullptr); 2945} 2946 2947template <class _T1, class _D1> 2948inline _LIBCPP_INLINE_VISIBILITY 2949bool 2950operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2951{ 2952 return !(__x < nullptr); 2953} 2954 2955template <class _T1, class _D1> 2956inline _LIBCPP_INLINE_VISIBILITY 2957bool 2958operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2959{ 2960 return !(nullptr < __x); 2961} 2962 2963#if _LIBCPP_STD_VER > 11 2964 2965template<class _Tp> 2966struct __unique_if 2967{ 2968 typedef unique_ptr<_Tp> __unique_single; 2969}; 2970 2971template<class _Tp> 2972struct __unique_if<_Tp[]> 2973{ 2974 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 2975}; 2976 2977template<class _Tp, size_t _Np> 2978struct __unique_if<_Tp[_Np]> 2979{ 2980 typedef void __unique_array_known_bound; 2981}; 2982 2983template<class _Tp, class... _Args> 2984inline _LIBCPP_INLINE_VISIBILITY 2985typename __unique_if<_Tp>::__unique_single 2986make_unique(_Args&&... __args) 2987{ 2988 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 2989} 2990 2991template<class _Tp> 2992inline _LIBCPP_INLINE_VISIBILITY 2993typename __unique_if<_Tp>::__unique_array_unknown_bound 2994make_unique(size_t __n) 2995{ 2996 typedef typename remove_extent<_Tp>::type _Up; 2997 return unique_ptr<_Tp>(new _Up[__n]()); 2998} 2999 3000template<class _Tp, class... _Args> 3001 typename __unique_if<_Tp>::__unique_array_known_bound 3002 make_unique(_Args&&...) = delete; 3003 3004#endif // _LIBCPP_STD_VER > 11 3005 3006template <class _Tp, class _Dp> 3007#ifdef _LIBCPP_CXX03_LANG 3008struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 3009#else 3010struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 3011 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer> > 3012#endif 3013{ 3014 typedef unique_ptr<_Tp, _Dp> argument_type; 3015 typedef size_t result_type; 3016 _LIBCPP_INLINE_VISIBILITY 3017 result_type operator()(const argument_type& __ptr) const 3018 { 3019 typedef typename argument_type::pointer pointer; 3020 return hash<pointer>()(__ptr.get()); 3021 } 3022}; 3023 3024struct __destruct_n 3025{ 3026private: 3027 size_t __size_; 3028 3029 template <class _Tp> 3030 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 3031 {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();} 3032 3033 template <class _Tp> 3034 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 3035 {} 3036 3037 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 3038 {++__size_;} 3039 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 3040 {} 3041 3042 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 3043 {__size_ = __s;} 3044 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 3045 {} 3046public: 3047 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 3048 : __size_(__s) {} 3049 3050 template <class _Tp> 3051 _LIBCPP_INLINE_VISIBILITY void __incr(_Tp*) _NOEXCEPT 3052 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3053 3054 template <class _Tp> 3055 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 3056 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3057 3058 template <class _Tp> 3059 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 3060 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3061}; 3062 3063template <class _Alloc> 3064class __allocator_destructor 3065{ 3066 typedef _LIBCPP_NODEBUG_TYPE allocator_traits<_Alloc> __alloc_traits; 3067public: 3068 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::pointer pointer; 3069 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::size_type size_type; 3070private: 3071 _Alloc& __alloc_; 3072 size_type __s_; 3073public: 3074 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 3075 _NOEXCEPT 3076 : __alloc_(__a), __s_(__s) {} 3077 _LIBCPP_INLINE_VISIBILITY 3078 void operator()(pointer __p) _NOEXCEPT 3079 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 3080}; 3081 3082template <class _InputIterator, class _ForwardIterator> 3083_ForwardIterator 3084uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 3085{ 3086 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3087#ifndef _LIBCPP_NO_EXCEPTIONS 3088 _ForwardIterator __s = __r; 3089 try 3090 { 3091#endif 3092 for (; __f != __l; ++__f, (void) ++__r) 3093 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3094#ifndef _LIBCPP_NO_EXCEPTIONS 3095 } 3096 catch (...) 3097 { 3098 for (; __s != __r; ++__s) 3099 __s->~value_type(); 3100 throw; 3101 } 3102#endif 3103 return __r; 3104} 3105 3106template <class _InputIterator, class _Size, class _ForwardIterator> 3107_ForwardIterator 3108uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 3109{ 3110 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3111#ifndef _LIBCPP_NO_EXCEPTIONS 3112 _ForwardIterator __s = __r; 3113 try 3114 { 3115#endif 3116 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 3117 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3118#ifndef _LIBCPP_NO_EXCEPTIONS 3119 } 3120 catch (...) 3121 { 3122 for (; __s != __r; ++__s) 3123 __s->~value_type(); 3124 throw; 3125 } 3126#endif 3127 return __r; 3128} 3129 3130template <class _ForwardIterator, class _Tp> 3131void 3132uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 3133{ 3134 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3135#ifndef _LIBCPP_NO_EXCEPTIONS 3136 _ForwardIterator __s = __f; 3137 try 3138 { 3139#endif 3140 for (; __f != __l; ++__f) 3141 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3142#ifndef _LIBCPP_NO_EXCEPTIONS 3143 } 3144 catch (...) 3145 { 3146 for (; __s != __f; ++__s) 3147 __s->~value_type(); 3148 throw; 3149 } 3150#endif 3151} 3152 3153template <class _ForwardIterator, class _Size, class _Tp> 3154_ForwardIterator 3155uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 3156{ 3157 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3158#ifndef _LIBCPP_NO_EXCEPTIONS 3159 _ForwardIterator __s = __f; 3160 try 3161 { 3162#endif 3163 for (; __n > 0; ++__f, (void) --__n) 3164 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3165#ifndef _LIBCPP_NO_EXCEPTIONS 3166 } 3167 catch (...) 3168 { 3169 for (; __s != __f; ++__s) 3170 __s->~value_type(); 3171 throw; 3172 } 3173#endif 3174 return __f; 3175} 3176 3177#if _LIBCPP_STD_VER > 14 3178 3179template <class _Tp> 3180inline _LIBCPP_INLINE_VISIBILITY 3181void destroy_at(_Tp* __loc) { 3182 _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); 3183 __loc->~_Tp(); 3184} 3185 3186template <class _ForwardIterator> 3187inline _LIBCPP_INLINE_VISIBILITY 3188void destroy(_ForwardIterator __first, _ForwardIterator __last) { 3189 for (; __first != __last; ++__first) 3190 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3191} 3192 3193template <class _ForwardIterator, class _Size> 3194inline _LIBCPP_INLINE_VISIBILITY 3195_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 3196 for (; __n > 0; (void)++__first, --__n) 3197 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3198 return __first; 3199} 3200 3201template <class _ForwardIterator> 3202inline _LIBCPP_INLINE_VISIBILITY 3203void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 3204 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3205 auto __idx = __first; 3206#ifndef _LIBCPP_NO_EXCEPTIONS 3207 try { 3208#endif 3209 for (; __idx != __last; ++__idx) 3210 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3211#ifndef _LIBCPP_NO_EXCEPTIONS 3212 } catch (...) { 3213 _VSTD::destroy(__first, __idx); 3214 throw; 3215 } 3216#endif 3217} 3218 3219template <class _ForwardIterator, class _Size> 3220inline _LIBCPP_INLINE_VISIBILITY 3221_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 3222 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3223 auto __idx = __first; 3224#ifndef _LIBCPP_NO_EXCEPTIONS 3225 try { 3226#endif 3227 for (; __n > 0; (void)++__idx, --__n) 3228 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3229 return __idx; 3230#ifndef _LIBCPP_NO_EXCEPTIONS 3231 } catch (...) { 3232 _VSTD::destroy(__first, __idx); 3233 throw; 3234 } 3235#endif 3236} 3237 3238 3239template <class _ForwardIterator> 3240inline _LIBCPP_INLINE_VISIBILITY 3241void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 3242 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3243 auto __idx = __first; 3244#ifndef _LIBCPP_NO_EXCEPTIONS 3245 try { 3246#endif 3247 for (; __idx != __last; ++__idx) 3248 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3249#ifndef _LIBCPP_NO_EXCEPTIONS 3250 } catch (...) { 3251 _VSTD::destroy(__first, __idx); 3252 throw; 3253 } 3254#endif 3255} 3256 3257template <class _ForwardIterator, class _Size> 3258inline _LIBCPP_INLINE_VISIBILITY 3259_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 3260 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3261 auto __idx = __first; 3262#ifndef _LIBCPP_NO_EXCEPTIONS 3263 try { 3264#endif 3265 for (; __n > 0; (void)++__idx, --__n) 3266 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3267 return __idx; 3268#ifndef _LIBCPP_NO_EXCEPTIONS 3269 } catch (...) { 3270 _VSTD::destroy(__first, __idx); 3271 throw; 3272 } 3273#endif 3274} 3275 3276 3277template <class _InputIt, class _ForwardIt> 3278inline _LIBCPP_INLINE_VISIBILITY 3279_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 3280 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3281 auto __idx = __first_res; 3282#ifndef _LIBCPP_NO_EXCEPTIONS 3283 try { 3284#endif 3285 for (; __first != __last; (void)++__idx, ++__first) 3286 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3287 return __idx; 3288#ifndef _LIBCPP_NO_EXCEPTIONS 3289 } catch (...) { 3290 _VSTD::destroy(__first_res, __idx); 3291 throw; 3292 } 3293#endif 3294} 3295 3296template <class _InputIt, class _Size, class _ForwardIt> 3297inline _LIBCPP_INLINE_VISIBILITY 3298pair<_InputIt, _ForwardIt> 3299uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 3300 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3301 auto __idx = __first_res; 3302#ifndef _LIBCPP_NO_EXCEPTIONS 3303 try { 3304#endif 3305 for (; __n > 0; ++__idx, (void)++__first, --__n) 3306 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3307 return {__first, __idx}; 3308#ifndef _LIBCPP_NO_EXCEPTIONS 3309 } catch (...) { 3310 _VSTD::destroy(__first_res, __idx); 3311 throw; 3312 } 3313#endif 3314} 3315 3316 3317#endif // _LIBCPP_STD_VER > 14 3318 3319// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 3320// should be sufficient for thread safety. 3321// See https://bugs.llvm.org/show_bug.cgi?id=22803 3322#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 3323 && defined(__ATOMIC_RELAXED) \ 3324 && defined(__ATOMIC_ACQ_REL) 3325# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3326#elif defined(_LIBCPP_COMPILER_GCC) 3327# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3328#endif 3329 3330template <class _Tp> 3331inline _LIBCPP_INLINE_VISIBILITY _Tp 3332__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 3333{ 3334#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3335 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 3336#else 3337 return __t += 1; 3338#endif 3339} 3340 3341template <class _Tp> 3342inline _LIBCPP_INLINE_VISIBILITY _Tp 3343__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 3344{ 3345#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3346 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 3347#else 3348 return __t -= 1; 3349#endif 3350} 3351 3352class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 3353 : public std::exception 3354{ 3355public: 3356 bad_weak_ptr() _NOEXCEPT = default; 3357 bad_weak_ptr(const bad_weak_ptr&) _NOEXCEPT = default; 3358 virtual ~bad_weak_ptr() _NOEXCEPT; 3359 virtual const char* what() const _NOEXCEPT; 3360}; 3361 3362_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY 3363void __throw_bad_weak_ptr() 3364{ 3365#ifndef _LIBCPP_NO_EXCEPTIONS 3366 throw bad_weak_ptr(); 3367#else 3368 _VSTD::abort(); 3369#endif 3370} 3371 3372template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 3373 3374class _LIBCPP_TYPE_VIS __shared_count 3375{ 3376 __shared_count(const __shared_count&); 3377 __shared_count& operator=(const __shared_count&); 3378 3379protected: 3380 long __shared_owners_; 3381 virtual ~__shared_count(); 3382private: 3383 virtual void __on_zero_shared() _NOEXCEPT = 0; 3384 3385public: 3386 _LIBCPP_INLINE_VISIBILITY 3387 explicit __shared_count(long __refs = 0) _NOEXCEPT 3388 : __shared_owners_(__refs) {} 3389 3390#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3391 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3392 void __add_shared() _NOEXCEPT; 3393 bool __release_shared() _NOEXCEPT; 3394#else 3395 _LIBCPP_INLINE_VISIBILITY 3396 void __add_shared() _NOEXCEPT { 3397 __libcpp_atomic_refcount_increment(__shared_owners_); 3398 } 3399 _LIBCPP_INLINE_VISIBILITY 3400 bool __release_shared() _NOEXCEPT { 3401 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 3402 __on_zero_shared(); 3403 return true; 3404 } 3405 return false; 3406 } 3407#endif 3408 _LIBCPP_INLINE_VISIBILITY 3409 long use_count() const _NOEXCEPT { 3410 return __libcpp_relaxed_load(&__shared_owners_) + 1; 3411 } 3412}; 3413 3414class _LIBCPP_TYPE_VIS __shared_weak_count 3415 : private __shared_count 3416{ 3417 long __shared_weak_owners_; 3418 3419public: 3420 _LIBCPP_INLINE_VISIBILITY 3421 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 3422 : __shared_count(__refs), 3423 __shared_weak_owners_(__refs) {} 3424protected: 3425 virtual ~__shared_weak_count(); 3426 3427public: 3428#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3429 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3430 void __add_shared() _NOEXCEPT; 3431 void __add_weak() _NOEXCEPT; 3432 void __release_shared() _NOEXCEPT; 3433#else 3434 _LIBCPP_INLINE_VISIBILITY 3435 void __add_shared() _NOEXCEPT { 3436 __shared_count::__add_shared(); 3437 } 3438 _LIBCPP_INLINE_VISIBILITY 3439 void __add_weak() _NOEXCEPT { 3440 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 3441 } 3442 _LIBCPP_INLINE_VISIBILITY 3443 void __release_shared() _NOEXCEPT { 3444 if (__shared_count::__release_shared()) 3445 __release_weak(); 3446 } 3447#endif 3448 void __release_weak() _NOEXCEPT; 3449 _LIBCPP_INLINE_VISIBILITY 3450 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 3451 __shared_weak_count* lock() _NOEXCEPT; 3452 3453 // Define the function out only if we build static libc++ without RTTI. 3454 // Otherwise we may break clients who need to compile their projects with 3455 // -fno-rtti and yet link against a libc++.dylib compiled 3456 // without -fno-rtti. 3457#if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC) 3458 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3459#endif 3460private: 3461 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 3462}; 3463 3464template <class _Tp, class _Dp, class _Alloc> 3465class __shared_ptr_pointer 3466 : public __shared_weak_count 3467{ 3468 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 3469public: 3470 _LIBCPP_INLINE_VISIBILITY 3471 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 3472 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 3473 3474#ifndef _LIBCPP_NO_RTTI 3475 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3476#endif 3477 3478private: 3479 virtual void __on_zero_shared() _NOEXCEPT; 3480 virtual void __on_zero_shared_weak() _NOEXCEPT; 3481}; 3482 3483#ifndef _LIBCPP_NO_RTTI 3484 3485template <class _Tp, class _Dp, class _Alloc> 3486const void* 3487__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 3488{ 3489 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 3490} 3491 3492#endif // _LIBCPP_NO_RTTI 3493 3494template <class _Tp, class _Dp, class _Alloc> 3495void 3496__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 3497{ 3498 __data_.first().second()(__data_.first().first()); 3499 __data_.first().second().~_Dp(); 3500} 3501 3502template <class _Tp, class _Dp, class _Alloc> 3503void 3504__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3505{ 3506 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 3507 typedef allocator_traits<_Al> _ATraits; 3508 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3509 3510 _Al __a(__data_.second()); 3511 __data_.second().~_Alloc(); 3512 __a.deallocate(_PTraits::pointer_to(*this), 1); 3513} 3514 3515template <class _Tp, class _Alloc> 3516class __shared_ptr_emplace 3517 : public __shared_weak_count 3518{ 3519 __compressed_pair<_Alloc, _Tp> __data_; 3520public: 3521 3522 _LIBCPP_INLINE_VISIBILITY 3523 __shared_ptr_emplace(_Alloc __a) 3524 : __data_(_VSTD::move(__a), __value_init_tag()) {} 3525 3526 3527#ifndef _LIBCPP_HAS_NO_VARIADICS 3528 template <class ..._Args> 3529 _LIBCPP_INLINE_VISIBILITY 3530 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 3531 : __data_(piecewise_construct, _VSTD::forward_as_tuple(__a), 3532 _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {} 3533#else // _LIBCPP_HAS_NO_VARIADICS 3534 3535 template <class _A0> 3536 _LIBCPP_INLINE_VISIBILITY 3537 __shared_ptr_emplace(_Alloc __a, _A0& __a0) 3538 : __data_(__a, _Tp(__a0)) {} 3539 3540 template <class _A0, class _A1> 3541 _LIBCPP_INLINE_VISIBILITY 3542 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1) 3543 : __data_(__a, _Tp(__a0, __a1)) {} 3544 3545 template <class _A0, class _A1, class _A2> 3546 _LIBCPP_INLINE_VISIBILITY 3547 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1, _A2& __a2) 3548 : __data_(__a, _Tp(__a0, __a1, __a2)) {} 3549 3550#endif // _LIBCPP_HAS_NO_VARIADICS 3551 3552private: 3553 virtual void __on_zero_shared() _NOEXCEPT; 3554 virtual void __on_zero_shared_weak() _NOEXCEPT; 3555public: 3556 _LIBCPP_INLINE_VISIBILITY 3557 _Tp* get() _NOEXCEPT {return _VSTD::addressof(__data_.second());} 3558}; 3559 3560template <class _Tp, class _Alloc> 3561void 3562__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared() _NOEXCEPT 3563{ 3564 __data_.second().~_Tp(); 3565} 3566 3567template <class _Tp, class _Alloc> 3568void 3569__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3570{ 3571 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type _Al; 3572 typedef allocator_traits<_Al> _ATraits; 3573 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3574 _Al __a(__data_.first()); 3575 __data_.first().~_Alloc(); 3576 __a.deallocate(_PTraits::pointer_to(*this), 1); 3577} 3578 3579struct __shared_ptr_dummy_rebind_allocator_type; 3580template <> 3581class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type> 3582{ 3583public: 3584 template <class _Other> 3585 struct rebind 3586 { 3587 typedef allocator<_Other> other; 3588 }; 3589}; 3590 3591template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 3592 3593template<class _Tp, class _Up> 3594struct __compatible_with 3595#if _LIBCPP_STD_VER > 14 3596 : is_convertible<remove_extent_t<_Tp>*, remove_extent_t<_Up>*> {}; 3597#else 3598 : is_convertible<_Tp*, _Up*> {}; 3599#endif // _LIBCPP_STD_VER > 14 3600 3601template<class _Tp> 3602class _LIBCPP_TEMPLATE_VIS shared_ptr 3603{ 3604public: 3605#if _LIBCPP_STD_VER > 14 3606 typedef weak_ptr<_Tp> weak_type; 3607 typedef remove_extent_t<_Tp> element_type; 3608#else 3609 typedef _Tp element_type; 3610#endif 3611 3612private: 3613 element_type* __ptr_; 3614 __shared_weak_count* __cntrl_; 3615 3616 struct __nat {int __for_bool_;}; 3617public: 3618 _LIBCPP_INLINE_VISIBILITY 3619 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 3620 _LIBCPP_INLINE_VISIBILITY 3621 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 3622 template<class _Yp> 3623 explicit shared_ptr(_Yp* __p, 3624 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3625 template<class _Yp, class _Dp> 3626 shared_ptr(_Yp* __p, _Dp __d, 3627 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3628 template<class _Yp, class _Dp, class _Alloc> 3629 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3630 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3631 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 3632 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 3633 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 3634 _LIBCPP_INLINE_VISIBILITY 3635 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 3636 template<class _Yp> 3637 _LIBCPP_INLINE_VISIBILITY 3638 shared_ptr(const shared_ptr<_Yp>& __r, 3639 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 3640 _NOEXCEPT; 3641#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3642 _LIBCPP_INLINE_VISIBILITY 3643 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 3644 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 3645 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 3646 _NOEXCEPT; 3647#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3648 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 3649 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 3650#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3651#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3652 template<class _Yp> 3653 shared_ptr(auto_ptr<_Yp>&& __r, 3654 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3655#else 3656 template<class _Yp> 3657 shared_ptr(auto_ptr<_Yp> __r, 3658 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3659#endif 3660#endif 3661#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3662 template <class _Yp, class _Dp> 3663 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3664 typename enable_if 3665 < 3666 !is_lvalue_reference<_Dp>::value && 3667 !is_array<_Yp>::value && 3668 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3669 __nat 3670 >::type = __nat()); 3671 template <class _Yp, class _Dp> 3672 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3673 typename enable_if 3674 < 3675 is_lvalue_reference<_Dp>::value && 3676 !is_array<_Yp>::value && 3677 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3678 __nat 3679 >::type = __nat()); 3680#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3681 template <class _Yp, class _Dp> 3682 shared_ptr(unique_ptr<_Yp, _Dp>, 3683 typename enable_if 3684 < 3685 !is_lvalue_reference<_Dp>::value && 3686 !is_array<_Yp>::value && 3687 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3688 __nat 3689 >::type = __nat()); 3690 template <class _Yp, class _Dp> 3691 shared_ptr(unique_ptr<_Yp, _Dp>, 3692 typename enable_if 3693 < 3694 is_lvalue_reference<_Dp>::value && 3695 !is_array<_Yp>::value && 3696 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3697 __nat 3698 >::type = __nat()); 3699#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3700 3701 ~shared_ptr(); 3702 3703 _LIBCPP_INLINE_VISIBILITY 3704 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 3705 template<class _Yp> 3706 typename enable_if 3707 < 3708 __compatible_with<_Yp, element_type>::value, 3709 shared_ptr& 3710 >::type 3711 _LIBCPP_INLINE_VISIBILITY 3712 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 3713#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3714 _LIBCPP_INLINE_VISIBILITY 3715 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 3716 template<class _Yp> 3717 typename enable_if 3718 < 3719 __compatible_with<_Yp, element_type>::value, 3720 shared_ptr& 3721 >::type 3722 _LIBCPP_INLINE_VISIBILITY 3723 operator=(shared_ptr<_Yp>&& __r); 3724#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3725 template<class _Yp> 3726 _LIBCPP_INLINE_VISIBILITY 3727 typename enable_if 3728 < 3729 !is_array<_Yp>::value && 3730 is_convertible<_Yp*, element_type*>::value, 3731 shared_ptr 3732 >::type& 3733 operator=(auto_ptr<_Yp>&& __r); 3734#endif 3735#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3736#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3737 template<class _Yp> 3738 _LIBCPP_INLINE_VISIBILITY 3739 typename enable_if 3740 < 3741 !is_array<_Yp>::value && 3742 is_convertible<_Yp*, element_type*>::value, 3743 shared_ptr& 3744 >::type 3745 operator=(auto_ptr<_Yp> __r); 3746#endif 3747#endif 3748 template <class _Yp, class _Dp> 3749 typename enable_if 3750 < 3751 !is_array<_Yp>::value && 3752 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3753 shared_ptr& 3754 >::type 3755#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3756 _LIBCPP_INLINE_VISIBILITY 3757 operator=(unique_ptr<_Yp, _Dp>&& __r); 3758#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3759 _LIBCPP_INLINE_VISIBILITY 3760 operator=(unique_ptr<_Yp, _Dp> __r); 3761#endif 3762 3763 _LIBCPP_INLINE_VISIBILITY 3764 void swap(shared_ptr& __r) _NOEXCEPT; 3765 _LIBCPP_INLINE_VISIBILITY 3766 void reset() _NOEXCEPT; 3767 template<class _Yp> 3768 typename enable_if 3769 < 3770 __compatible_with<_Yp, element_type>::value, 3771 void 3772 >::type 3773 _LIBCPP_INLINE_VISIBILITY 3774 reset(_Yp* __p); 3775 template<class _Yp, class _Dp> 3776 typename enable_if 3777 < 3778 __compatible_with<_Yp, element_type>::value, 3779 void 3780 >::type 3781 _LIBCPP_INLINE_VISIBILITY 3782 reset(_Yp* __p, _Dp __d); 3783 template<class _Yp, class _Dp, class _Alloc> 3784 typename enable_if 3785 < 3786 __compatible_with<_Yp, element_type>::value, 3787 void 3788 >::type 3789 _LIBCPP_INLINE_VISIBILITY 3790 reset(_Yp* __p, _Dp __d, _Alloc __a); 3791 3792 _LIBCPP_INLINE_VISIBILITY 3793 element_type* get() const _NOEXCEPT {return __ptr_;} 3794 _LIBCPP_INLINE_VISIBILITY 3795 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 3796 {return *__ptr_;} 3797 _LIBCPP_INLINE_VISIBILITY 3798 element_type* operator->() const _NOEXCEPT 3799 { 3800 static_assert(!_VSTD::is_array<_Tp>::value, 3801 "std::shared_ptr<T>::operator-> is only valid when T is not an array type."); 3802 return __ptr_; 3803 } 3804 _LIBCPP_INLINE_VISIBILITY 3805 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 3806 _LIBCPP_INLINE_VISIBILITY 3807 bool unique() const _NOEXCEPT {return use_count() == 1;} 3808 _LIBCPP_INLINE_VISIBILITY 3809 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != 0;} 3810 template <class _Up> 3811 _LIBCPP_INLINE_VISIBILITY 3812 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 3813 {return __cntrl_ < __p.__cntrl_;} 3814 template <class _Up> 3815 _LIBCPP_INLINE_VISIBILITY 3816 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 3817 {return __cntrl_ < __p.__cntrl_;} 3818 _LIBCPP_INLINE_VISIBILITY 3819 bool 3820 __owner_equivalent(const shared_ptr& __p) const 3821 {return __cntrl_ == __p.__cntrl_;} 3822 3823#if _LIBCPP_STD_VER > 14 3824 typename add_lvalue_reference<element_type>::type 3825 _LIBCPP_INLINE_VISIBILITY 3826 operator[](ptrdiff_t __i) const 3827 { 3828 static_assert(_VSTD::is_array<_Tp>::value, 3829 "std::shared_ptr<T>::operator[] is only valid when T is an array type."); 3830 return __ptr_[__i]; 3831 } 3832#endif 3833 3834#ifndef _LIBCPP_NO_RTTI 3835 template <class _Dp> 3836 _LIBCPP_INLINE_VISIBILITY 3837 _Dp* __get_deleter() const _NOEXCEPT 3838 {return static_cast<_Dp*>(__cntrl_ 3839 ? const_cast<void *>(__cntrl_->__get_deleter(typeid(_Dp))) 3840 : nullptr);} 3841#endif // _LIBCPP_NO_RTTI 3842 3843 template<class _Yp, class _CntrlBlk> 3844 static shared_ptr<_Tp> 3845 __create_with_control_block(_Yp* __p, _CntrlBlk* __cntrl) _NOEXCEPT 3846 { 3847 shared_ptr<_Tp> __r; 3848 __r.__ptr_ = __p; 3849 __r.__cntrl_ = __cntrl; 3850 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 3851 return __r; 3852 } 3853 3854private: 3855 template <class _Yp, bool = is_function<_Yp>::value> 3856 struct __shared_ptr_default_allocator 3857 { 3858 typedef allocator<_Yp> type; 3859 }; 3860 3861 template <class _Yp> 3862 struct __shared_ptr_default_allocator<_Yp, true> 3863 { 3864 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type; 3865 }; 3866 3867 template <class _Yp, class _OrigPtr> 3868 _LIBCPP_INLINE_VISIBILITY 3869 typename enable_if<is_convertible<_OrigPtr*, 3870 const enable_shared_from_this<_Yp>* 3871 >::value, 3872 void>::type 3873 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 3874 _OrigPtr* __ptr) _NOEXCEPT 3875 { 3876 typedef typename remove_cv<_Yp>::type _RawYp; 3877 if (__e && __e->__weak_this_.expired()) 3878 { 3879 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 3880 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 3881 } 3882 } 3883 3884 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {} 3885 3886 template <class, class _Yp> 3887 struct __shared_ptr_default_delete 3888 : default_delete<_Yp> {}; 3889 3890 template <class _Yp, class _Un, size_t _Sz> 3891 struct __shared_ptr_default_delete<_Yp[_Sz], _Un> 3892 : default_delete<_Yp[]> {}; 3893 3894 template <class _Yp, class _Un> 3895 struct __shared_ptr_default_delete<_Yp[], _Un> 3896 : default_delete<_Yp[]> {}; 3897 3898 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 3899 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 3900}; 3901 3902#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 3903template<class _Tp> 3904shared_ptr(weak_ptr<_Tp>) -> shared_ptr<_Tp>; 3905template<class _Tp, class _Dp> 3906shared_ptr(unique_ptr<_Tp, _Dp>) -> shared_ptr<_Tp>; 3907#endif 3908 3909template<class _Tp> 3910inline 3911_LIBCPP_CONSTEXPR 3912shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 3913 : __ptr_(0), 3914 __cntrl_(0) 3915{ 3916} 3917 3918template<class _Tp> 3919inline 3920_LIBCPP_CONSTEXPR 3921shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 3922 : __ptr_(0), 3923 __cntrl_(0) 3924{ 3925} 3926 3927template<class _Tp> 3928template<class _Yp> 3929shared_ptr<_Tp>::shared_ptr(_Yp* __p, 3930 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3931 : __ptr_(__p) 3932{ 3933 unique_ptr<_Yp> __hold(__p); 3934 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3935 typedef __shared_ptr_pointer<_Yp*, __shared_ptr_default_delete<_Tp, _Yp>, _AllocT > _CntrlBlk; 3936 __cntrl_ = new _CntrlBlk(__p, __shared_ptr_default_delete<_Tp, _Yp>(), _AllocT()); 3937 __hold.release(); 3938 __enable_weak_this(__p, __p); 3939} 3940 3941template<class _Tp> 3942template<class _Yp, class _Dp> 3943shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 3944 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3945 : __ptr_(__p) 3946{ 3947#ifndef _LIBCPP_NO_EXCEPTIONS 3948 try 3949 { 3950#endif // _LIBCPP_NO_EXCEPTIONS 3951 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3952 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 3953 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3954 __enable_weak_this(__p, __p); 3955#ifndef _LIBCPP_NO_EXCEPTIONS 3956 } 3957 catch (...) 3958 { 3959 __d(__p); 3960 throw; 3961 } 3962#endif // _LIBCPP_NO_EXCEPTIONS 3963} 3964 3965template<class _Tp> 3966template<class _Dp> 3967shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 3968 : __ptr_(0) 3969{ 3970#ifndef _LIBCPP_NO_EXCEPTIONS 3971 try 3972 { 3973#endif // _LIBCPP_NO_EXCEPTIONS 3974 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT; 3975 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk; 3976 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3977#ifndef _LIBCPP_NO_EXCEPTIONS 3978 } 3979 catch (...) 3980 { 3981 __d(__p); 3982 throw; 3983 } 3984#endif // _LIBCPP_NO_EXCEPTIONS 3985} 3986 3987template<class _Tp> 3988template<class _Yp, class _Dp, class _Alloc> 3989shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3990 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3991 : __ptr_(__p) 3992{ 3993#ifndef _LIBCPP_NO_EXCEPTIONS 3994 try 3995 { 3996#endif // _LIBCPP_NO_EXCEPTIONS 3997 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 3998 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3999 typedef __allocator_destructor<_A2> _D2; 4000 _A2 __a2(__a); 4001 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4002 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4003 _CntrlBlk(__p, __d, __a); 4004 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4005 __enable_weak_this(__p, __p); 4006#ifndef _LIBCPP_NO_EXCEPTIONS 4007 } 4008 catch (...) 4009 { 4010 __d(__p); 4011 throw; 4012 } 4013#endif // _LIBCPP_NO_EXCEPTIONS 4014} 4015 4016template<class _Tp> 4017template<class _Dp, class _Alloc> 4018shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 4019 : __ptr_(0) 4020{ 4021#ifndef _LIBCPP_NO_EXCEPTIONS 4022 try 4023 { 4024#endif // _LIBCPP_NO_EXCEPTIONS 4025 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 4026 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4027 typedef __allocator_destructor<_A2> _D2; 4028 _A2 __a2(__a); 4029 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4030 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4031 _CntrlBlk(__p, __d, __a); 4032 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4033#ifndef _LIBCPP_NO_EXCEPTIONS 4034 } 4035 catch (...) 4036 { 4037 __d(__p); 4038 throw; 4039 } 4040#endif // _LIBCPP_NO_EXCEPTIONS 4041} 4042 4043template<class _Tp> 4044template<class _Yp> 4045inline 4046shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 4047 : __ptr_(__p), 4048 __cntrl_(__r.__cntrl_) 4049{ 4050 if (__cntrl_) 4051 __cntrl_->__add_shared(); 4052} 4053 4054template<class _Tp> 4055inline 4056shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 4057 : __ptr_(__r.__ptr_), 4058 __cntrl_(__r.__cntrl_) 4059{ 4060 if (__cntrl_) 4061 __cntrl_->__add_shared(); 4062} 4063 4064template<class _Tp> 4065template<class _Yp> 4066inline 4067shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 4068 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 4069 _NOEXCEPT 4070 : __ptr_(__r.__ptr_), 4071 __cntrl_(__r.__cntrl_) 4072{ 4073 if (__cntrl_) 4074 __cntrl_->__add_shared(); 4075} 4076 4077#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4078 4079template<class _Tp> 4080inline 4081shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 4082 : __ptr_(__r.__ptr_), 4083 __cntrl_(__r.__cntrl_) 4084{ 4085 __r.__ptr_ = 0; 4086 __r.__cntrl_ = 0; 4087} 4088 4089template<class _Tp> 4090template<class _Yp> 4091inline 4092shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 4093 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 4094 _NOEXCEPT 4095 : __ptr_(__r.__ptr_), 4096 __cntrl_(__r.__cntrl_) 4097{ 4098 __r.__ptr_ = 0; 4099 __r.__cntrl_ = 0; 4100} 4101 4102#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4103 4104#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4105template<class _Tp> 4106template<class _Yp> 4107#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4108shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 4109#else 4110shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp> __r, 4111#endif 4112 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4113 : __ptr_(__r.get()) 4114{ 4115 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 4116 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 4117 __enable_weak_this(__r.get(), __r.get()); 4118 __r.release(); 4119} 4120#endif 4121 4122template<class _Tp> 4123template <class _Yp, class _Dp> 4124#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4125shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4126#else 4127shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4128#endif 4129 typename enable_if 4130 < 4131 !is_lvalue_reference<_Dp>::value && 4132 !is_array<_Yp>::value && 4133 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4134 __nat 4135 >::type) 4136 : __ptr_(__r.get()) 4137{ 4138#if _LIBCPP_STD_VER > 11 4139 if (__ptr_ == nullptr) 4140 __cntrl_ = nullptr; 4141 else 4142#endif 4143 { 4144 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4145 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 4146 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT()); 4147 __enable_weak_this(__r.get(), __r.get()); 4148 } 4149 __r.release(); 4150} 4151 4152template<class _Tp> 4153template <class _Yp, class _Dp> 4154#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4155shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4156#else 4157shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4158#endif 4159 typename enable_if 4160 < 4161 is_lvalue_reference<_Dp>::value && 4162 !is_array<_Yp>::value && 4163 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4164 __nat 4165 >::type) 4166 : __ptr_(__r.get()) 4167{ 4168#if _LIBCPP_STD_VER > 11 4169 if (__ptr_ == nullptr) 4170 __cntrl_ = nullptr; 4171 else 4172#endif 4173 { 4174 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4175 typedef __shared_ptr_pointer<_Yp*, 4176 reference_wrapper<typename remove_reference<_Dp>::type>, 4177 _AllocT > _CntrlBlk; 4178 __cntrl_ = new _CntrlBlk(__r.get(), _VSTD::ref(__r.get_deleter()), _AllocT()); 4179 __enable_weak_this(__r.get(), __r.get()); 4180 } 4181 __r.release(); 4182} 4183 4184template<class _Tp> 4185shared_ptr<_Tp>::~shared_ptr() 4186{ 4187 if (__cntrl_) 4188 __cntrl_->__release_shared(); 4189} 4190 4191template<class _Tp> 4192inline 4193shared_ptr<_Tp>& 4194shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 4195{ 4196 shared_ptr(__r).swap(*this); 4197 return *this; 4198} 4199 4200template<class _Tp> 4201template<class _Yp> 4202inline 4203typename enable_if 4204< 4205 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4206 shared_ptr<_Tp>& 4207>::type 4208shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 4209{ 4210 shared_ptr(__r).swap(*this); 4211 return *this; 4212} 4213 4214#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4215 4216template<class _Tp> 4217inline 4218shared_ptr<_Tp>& 4219shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 4220{ 4221 shared_ptr(_VSTD::move(__r)).swap(*this); 4222 return *this; 4223} 4224 4225template<class _Tp> 4226template<class _Yp> 4227inline 4228typename enable_if 4229< 4230 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4231 shared_ptr<_Tp>& 4232>::type 4233shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 4234{ 4235 shared_ptr(_VSTD::move(__r)).swap(*this); 4236 return *this; 4237} 4238 4239#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4240template<class _Tp> 4241template<class _Yp> 4242inline 4243typename enable_if 4244< 4245 !is_array<_Yp>::value && 4246 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4247 shared_ptr<_Tp> 4248>::type& 4249shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 4250{ 4251 shared_ptr(_VSTD::move(__r)).swap(*this); 4252 return *this; 4253} 4254#endif 4255 4256template<class _Tp> 4257template <class _Yp, class _Dp> 4258inline 4259typename enable_if 4260< 4261 !is_array<_Yp>::value && 4262 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4263 typename shared_ptr<_Tp>::element_type*>::value, 4264 shared_ptr<_Tp>& 4265>::type 4266shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 4267{ 4268 shared_ptr(_VSTD::move(__r)).swap(*this); 4269 return *this; 4270} 4271 4272#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4273 4274#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4275template<class _Tp> 4276template<class _Yp> 4277inline _LIBCPP_INLINE_VISIBILITY 4278typename enable_if 4279< 4280 !is_array<_Yp>::value && 4281 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4282 shared_ptr<_Tp>& 4283>::type 4284shared_ptr<_Tp>::operator=(auto_ptr<_Yp> __r) 4285{ 4286 shared_ptr(__r).swap(*this); 4287 return *this; 4288} 4289#endif 4290 4291template<class _Tp> 4292template <class _Yp, class _Dp> 4293inline _LIBCPP_INLINE_VISIBILITY 4294typename enable_if 4295< 4296 !is_array<_Yp>::value && 4297 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4298 typename shared_ptr<_Tp>::element_type*>::value, 4299 shared_ptr<_Tp>& 4300>::type 4301shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp> __r) 4302{ 4303 shared_ptr(_VSTD::move(__r)).swap(*this); 4304 return *this; 4305} 4306 4307#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4308 4309template<class _Tp> 4310inline 4311void 4312shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 4313{ 4314 _VSTD::swap(__ptr_, __r.__ptr_); 4315 _VSTD::swap(__cntrl_, __r.__cntrl_); 4316} 4317 4318template<class _Tp> 4319inline 4320void 4321shared_ptr<_Tp>::reset() _NOEXCEPT 4322{ 4323 shared_ptr().swap(*this); 4324} 4325 4326template<class _Tp> 4327template<class _Yp> 4328inline 4329typename enable_if 4330< 4331 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4332 void 4333>::type 4334shared_ptr<_Tp>::reset(_Yp* __p) 4335{ 4336 shared_ptr(__p).swap(*this); 4337} 4338 4339template<class _Tp> 4340template<class _Yp, class _Dp> 4341inline 4342typename enable_if 4343< 4344 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4345 void 4346>::type 4347shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 4348{ 4349 shared_ptr(__p, __d).swap(*this); 4350} 4351 4352template<class _Tp> 4353template<class _Yp, class _Dp, class _Alloc> 4354inline 4355typename enable_if 4356< 4357 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4358 void 4359>::type 4360shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 4361{ 4362 shared_ptr(__p, __d, __a).swap(*this); 4363} 4364 4365template<class _Tp, class ..._Args> 4366inline _LIBCPP_INLINE_VISIBILITY 4367typename enable_if 4368< 4369 !is_array<_Tp>::value, 4370 shared_ptr<_Tp> 4371>::type 4372make_shared(_Args&& ...__args) 4373{ 4374 static_assert(is_constructible<_Tp, _Args...>::value, "Can't construct object in make_shared"); 4375 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4376 typedef allocator<_CntrlBlk> _A2; 4377 typedef __allocator_destructor<_A2> _D2; 4378 4379 _A2 __a2; 4380 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4381 ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...); 4382 4383 _Tp *__ptr = __hold2.get()->get(); 4384 return shared_ptr<_Tp>::__create_with_control_block(__ptr, __hold2.release()); 4385} 4386 4387template<class _Tp, class _Alloc, class ..._Args> 4388inline _LIBCPP_INLINE_VISIBILITY 4389typename enable_if 4390< 4391 !is_array<_Tp>::value, 4392 shared_ptr<_Tp> 4393>::type 4394allocate_shared(const _Alloc& __a, _Args&& ...__args) 4395{ 4396 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in allocate_shared"); 4397 4398 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4399 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4400 typedef __allocator_destructor<_A2> _D2; 4401 4402 _A2 __a2(__a); 4403 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4404 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4405 _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...); 4406 4407 typename shared_ptr<_Tp>::element_type *__p = __hold2.get()->get(); 4408 return shared_ptr<_Tp>::__create_with_control_block(__p, _VSTD::addressof(*__hold2.release())); 4409} 4410 4411template<class _Tp, class _Up> 4412inline _LIBCPP_INLINE_VISIBILITY 4413bool 4414operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4415{ 4416 return __x.get() == __y.get(); 4417} 4418 4419template<class _Tp, class _Up> 4420inline _LIBCPP_INLINE_VISIBILITY 4421bool 4422operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4423{ 4424 return !(__x == __y); 4425} 4426 4427template<class _Tp, class _Up> 4428inline _LIBCPP_INLINE_VISIBILITY 4429bool 4430operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4431{ 4432#if _LIBCPP_STD_VER <= 11 4433 typedef typename common_type<_Tp*, _Up*>::type _Vp; 4434 return less<_Vp>()(__x.get(), __y.get()); 4435#else 4436 return less<>()(__x.get(), __y.get()); 4437#endif 4438 4439} 4440 4441template<class _Tp, class _Up> 4442inline _LIBCPP_INLINE_VISIBILITY 4443bool 4444operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4445{ 4446 return __y < __x; 4447} 4448 4449template<class _Tp, class _Up> 4450inline _LIBCPP_INLINE_VISIBILITY 4451bool 4452operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4453{ 4454 return !(__y < __x); 4455} 4456 4457template<class _Tp, class _Up> 4458inline _LIBCPP_INLINE_VISIBILITY 4459bool 4460operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4461{ 4462 return !(__x < __y); 4463} 4464 4465template<class _Tp> 4466inline _LIBCPP_INLINE_VISIBILITY 4467bool 4468operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4469{ 4470 return !__x; 4471} 4472 4473template<class _Tp> 4474inline _LIBCPP_INLINE_VISIBILITY 4475bool 4476operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4477{ 4478 return !__x; 4479} 4480 4481template<class _Tp> 4482inline _LIBCPP_INLINE_VISIBILITY 4483bool 4484operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4485{ 4486 return static_cast<bool>(__x); 4487} 4488 4489template<class _Tp> 4490inline _LIBCPP_INLINE_VISIBILITY 4491bool 4492operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4493{ 4494 return static_cast<bool>(__x); 4495} 4496 4497template<class _Tp> 4498inline _LIBCPP_INLINE_VISIBILITY 4499bool 4500operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4501{ 4502 return less<_Tp*>()(__x.get(), nullptr); 4503} 4504 4505template<class _Tp> 4506inline _LIBCPP_INLINE_VISIBILITY 4507bool 4508operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4509{ 4510 return less<_Tp*>()(nullptr, __x.get()); 4511} 4512 4513template<class _Tp> 4514inline _LIBCPP_INLINE_VISIBILITY 4515bool 4516operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4517{ 4518 return nullptr < __x; 4519} 4520 4521template<class _Tp> 4522inline _LIBCPP_INLINE_VISIBILITY 4523bool 4524operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4525{ 4526 return __x < nullptr; 4527} 4528 4529template<class _Tp> 4530inline _LIBCPP_INLINE_VISIBILITY 4531bool 4532operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4533{ 4534 return !(nullptr < __x); 4535} 4536 4537template<class _Tp> 4538inline _LIBCPP_INLINE_VISIBILITY 4539bool 4540operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4541{ 4542 return !(__x < nullptr); 4543} 4544 4545template<class _Tp> 4546inline _LIBCPP_INLINE_VISIBILITY 4547bool 4548operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4549{ 4550 return !(__x < nullptr); 4551} 4552 4553template<class _Tp> 4554inline _LIBCPP_INLINE_VISIBILITY 4555bool 4556operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4557{ 4558 return !(nullptr < __x); 4559} 4560 4561template<class _Tp> 4562inline _LIBCPP_INLINE_VISIBILITY 4563void 4564swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 4565{ 4566 __x.swap(__y); 4567} 4568 4569template<class _Tp, class _Up> 4570inline _LIBCPP_INLINE_VISIBILITY 4571shared_ptr<_Tp> 4572static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4573{ 4574 return shared_ptr<_Tp>(__r, 4575 static_cast< 4576 typename shared_ptr<_Tp>::element_type*>(__r.get())); 4577} 4578 4579template<class _Tp, class _Up> 4580inline _LIBCPP_INLINE_VISIBILITY 4581shared_ptr<_Tp> 4582dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4583{ 4584 typedef typename shared_ptr<_Tp>::element_type _ET; 4585 _ET* __p = dynamic_cast<_ET*>(__r.get()); 4586 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 4587} 4588 4589template<class _Tp, class _Up> 4590shared_ptr<_Tp> 4591const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4592{ 4593 typedef typename shared_ptr<_Tp>::element_type _RTp; 4594 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 4595} 4596 4597template<class _Tp, class _Up> 4598shared_ptr<_Tp> 4599reinterpret_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4600{ 4601 return shared_ptr<_Tp>(__r, 4602 reinterpret_cast< 4603 typename shared_ptr<_Tp>::element_type*>(__r.get())); 4604} 4605 4606#ifndef _LIBCPP_NO_RTTI 4607 4608template<class _Dp, class _Tp> 4609inline _LIBCPP_INLINE_VISIBILITY 4610_Dp* 4611get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 4612{ 4613 return __p.template __get_deleter<_Dp>(); 4614} 4615 4616#endif // _LIBCPP_NO_RTTI 4617 4618template<class _Tp> 4619class _LIBCPP_TEMPLATE_VIS weak_ptr 4620{ 4621public: 4622 typedef _Tp element_type; 4623private: 4624 element_type* __ptr_; 4625 __shared_weak_count* __cntrl_; 4626 4627public: 4628 _LIBCPP_INLINE_VISIBILITY 4629 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 4630 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 4631 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4632 _NOEXCEPT; 4633 _LIBCPP_INLINE_VISIBILITY 4634 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 4635 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 4636 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4637 _NOEXCEPT; 4638 4639#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4640 _LIBCPP_INLINE_VISIBILITY 4641 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 4642 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 4643 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4644 _NOEXCEPT; 4645#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4646 ~weak_ptr(); 4647 4648 _LIBCPP_INLINE_VISIBILITY 4649 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 4650 template<class _Yp> 4651 typename enable_if 4652 < 4653 is_convertible<_Yp*, element_type*>::value, 4654 weak_ptr& 4655 >::type 4656 _LIBCPP_INLINE_VISIBILITY 4657 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 4658 4659#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4660 4661 _LIBCPP_INLINE_VISIBILITY 4662 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 4663 template<class _Yp> 4664 typename enable_if 4665 < 4666 is_convertible<_Yp*, element_type*>::value, 4667 weak_ptr& 4668 >::type 4669 _LIBCPP_INLINE_VISIBILITY 4670 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 4671 4672#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4673 4674 template<class _Yp> 4675 typename enable_if 4676 < 4677 is_convertible<_Yp*, element_type*>::value, 4678 weak_ptr& 4679 >::type 4680 _LIBCPP_INLINE_VISIBILITY 4681 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 4682 4683 _LIBCPP_INLINE_VISIBILITY 4684 void swap(weak_ptr& __r) _NOEXCEPT; 4685 _LIBCPP_INLINE_VISIBILITY 4686 void reset() _NOEXCEPT; 4687 4688 _LIBCPP_INLINE_VISIBILITY 4689 long use_count() const _NOEXCEPT 4690 {return __cntrl_ ? __cntrl_->use_count() : 0;} 4691 _LIBCPP_INLINE_VISIBILITY 4692 bool expired() const _NOEXCEPT 4693 {return __cntrl_ == 0 || __cntrl_->use_count() == 0;} 4694 shared_ptr<_Tp> lock() const _NOEXCEPT; 4695 template<class _Up> 4696 _LIBCPP_INLINE_VISIBILITY 4697 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 4698 {return __cntrl_ < __r.__cntrl_;} 4699 template<class _Up> 4700 _LIBCPP_INLINE_VISIBILITY 4701 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 4702 {return __cntrl_ < __r.__cntrl_;} 4703 4704 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 4705 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 4706}; 4707 4708#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 4709template<class _Tp> 4710weak_ptr(shared_ptr<_Tp>) -> weak_ptr<_Tp>; 4711#endif 4712 4713template<class _Tp> 4714inline 4715_LIBCPP_CONSTEXPR 4716weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 4717 : __ptr_(0), 4718 __cntrl_(0) 4719{ 4720} 4721 4722template<class _Tp> 4723inline 4724weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 4725 : __ptr_(__r.__ptr_), 4726 __cntrl_(__r.__cntrl_) 4727{ 4728 if (__cntrl_) 4729 __cntrl_->__add_weak(); 4730} 4731 4732template<class _Tp> 4733template<class _Yp> 4734inline 4735weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 4736 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4737 _NOEXCEPT 4738 : __ptr_(__r.__ptr_), 4739 __cntrl_(__r.__cntrl_) 4740{ 4741 if (__cntrl_) 4742 __cntrl_->__add_weak(); 4743} 4744 4745template<class _Tp> 4746template<class _Yp> 4747inline 4748weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 4749 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4750 _NOEXCEPT 4751 : __ptr_(__r.__ptr_), 4752 __cntrl_(__r.__cntrl_) 4753{ 4754 if (__cntrl_) 4755 __cntrl_->__add_weak(); 4756} 4757 4758#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4759 4760template<class _Tp> 4761inline 4762weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 4763 : __ptr_(__r.__ptr_), 4764 __cntrl_(__r.__cntrl_) 4765{ 4766 __r.__ptr_ = 0; 4767 __r.__cntrl_ = 0; 4768} 4769 4770template<class _Tp> 4771template<class _Yp> 4772inline 4773weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 4774 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4775 _NOEXCEPT 4776 : __ptr_(__r.__ptr_), 4777 __cntrl_(__r.__cntrl_) 4778{ 4779 __r.__ptr_ = 0; 4780 __r.__cntrl_ = 0; 4781} 4782 4783#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4784 4785template<class _Tp> 4786weak_ptr<_Tp>::~weak_ptr() 4787{ 4788 if (__cntrl_) 4789 __cntrl_->__release_weak(); 4790} 4791 4792template<class _Tp> 4793inline 4794weak_ptr<_Tp>& 4795weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 4796{ 4797 weak_ptr(__r).swap(*this); 4798 return *this; 4799} 4800 4801template<class _Tp> 4802template<class _Yp> 4803inline 4804typename enable_if 4805< 4806 is_convertible<_Yp*, _Tp*>::value, 4807 weak_ptr<_Tp>& 4808>::type 4809weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 4810{ 4811 weak_ptr(__r).swap(*this); 4812 return *this; 4813} 4814 4815#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4816 4817template<class _Tp> 4818inline 4819weak_ptr<_Tp>& 4820weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 4821{ 4822 weak_ptr(_VSTD::move(__r)).swap(*this); 4823 return *this; 4824} 4825 4826template<class _Tp> 4827template<class _Yp> 4828inline 4829typename enable_if 4830< 4831 is_convertible<_Yp*, _Tp*>::value, 4832 weak_ptr<_Tp>& 4833>::type 4834weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 4835{ 4836 weak_ptr(_VSTD::move(__r)).swap(*this); 4837 return *this; 4838} 4839 4840#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4841 4842template<class _Tp> 4843template<class _Yp> 4844inline 4845typename enable_if 4846< 4847 is_convertible<_Yp*, _Tp*>::value, 4848 weak_ptr<_Tp>& 4849>::type 4850weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 4851{ 4852 weak_ptr(__r).swap(*this); 4853 return *this; 4854} 4855 4856template<class _Tp> 4857inline 4858void 4859weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 4860{ 4861 _VSTD::swap(__ptr_, __r.__ptr_); 4862 _VSTD::swap(__cntrl_, __r.__cntrl_); 4863} 4864 4865template<class _Tp> 4866inline _LIBCPP_INLINE_VISIBILITY 4867void 4868swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 4869{ 4870 __x.swap(__y); 4871} 4872 4873template<class _Tp> 4874inline 4875void 4876weak_ptr<_Tp>::reset() _NOEXCEPT 4877{ 4878 weak_ptr().swap(*this); 4879} 4880 4881template<class _Tp> 4882template<class _Yp> 4883shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 4884 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4885 : __ptr_(__r.__ptr_), 4886 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 4887{ 4888 if (__cntrl_ == 0) 4889 __throw_bad_weak_ptr(); 4890} 4891 4892template<class _Tp> 4893shared_ptr<_Tp> 4894weak_ptr<_Tp>::lock() const _NOEXCEPT 4895{ 4896 shared_ptr<_Tp> __r; 4897 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 4898 if (__r.__cntrl_) 4899 __r.__ptr_ = __ptr_; 4900 return __r; 4901} 4902 4903#if _LIBCPP_STD_VER > 14 4904template <class _Tp = void> struct owner_less; 4905#else 4906template <class _Tp> struct owner_less; 4907#endif 4908 4909template <class _Tp> 4910struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 4911 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 4912{ 4913 typedef bool result_type; 4914 _LIBCPP_INLINE_VISIBILITY 4915 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4916 {return __x.owner_before(__y);} 4917 _LIBCPP_INLINE_VISIBILITY 4918 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4919 {return __x.owner_before(__y);} 4920 _LIBCPP_INLINE_VISIBILITY 4921 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4922 {return __x.owner_before(__y);} 4923}; 4924 4925template <class _Tp> 4926struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 4927 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 4928{ 4929 typedef bool result_type; 4930 _LIBCPP_INLINE_VISIBILITY 4931 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4932 {return __x.owner_before(__y);} 4933 _LIBCPP_INLINE_VISIBILITY 4934 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4935 {return __x.owner_before(__y);} 4936 _LIBCPP_INLINE_VISIBILITY 4937 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4938 {return __x.owner_before(__y);} 4939}; 4940 4941#if _LIBCPP_STD_VER > 14 4942template <> 4943struct _LIBCPP_TEMPLATE_VIS owner_less<void> 4944{ 4945 template <class _Tp, class _Up> 4946 _LIBCPP_INLINE_VISIBILITY 4947 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 4948 {return __x.owner_before(__y);} 4949 template <class _Tp, class _Up> 4950 _LIBCPP_INLINE_VISIBILITY 4951 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 4952 {return __x.owner_before(__y);} 4953 template <class _Tp, class _Up> 4954 _LIBCPP_INLINE_VISIBILITY 4955 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 4956 {return __x.owner_before(__y);} 4957 template <class _Tp, class _Up> 4958 _LIBCPP_INLINE_VISIBILITY 4959 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 4960 {return __x.owner_before(__y);} 4961 typedef void is_transparent; 4962}; 4963#endif 4964 4965template<class _Tp> 4966class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 4967{ 4968 mutable weak_ptr<_Tp> __weak_this_; 4969protected: 4970 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4971 enable_shared_from_this() _NOEXCEPT {} 4972 _LIBCPP_INLINE_VISIBILITY 4973 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 4974 _LIBCPP_INLINE_VISIBILITY 4975 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 4976 {return *this;} 4977 _LIBCPP_INLINE_VISIBILITY 4978 ~enable_shared_from_this() {} 4979public: 4980 _LIBCPP_INLINE_VISIBILITY 4981 shared_ptr<_Tp> shared_from_this() 4982 {return shared_ptr<_Tp>(__weak_this_);} 4983 _LIBCPP_INLINE_VISIBILITY 4984 shared_ptr<_Tp const> shared_from_this() const 4985 {return shared_ptr<const _Tp>(__weak_this_);} 4986 4987#if _LIBCPP_STD_VER > 14 4988 _LIBCPP_INLINE_VISIBILITY 4989 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 4990 { return __weak_this_; } 4991 4992 _LIBCPP_INLINE_VISIBILITY 4993 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 4994 { return __weak_this_; } 4995#endif // _LIBCPP_STD_VER > 14 4996 4997 template <class _Up> friend class shared_ptr; 4998}; 4999 5000template <class _Tp> 5001struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 5002{ 5003 typedef shared_ptr<_Tp> argument_type; 5004 typedef size_t result_type; 5005 5006 _LIBCPP_INLINE_VISIBILITY 5007 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 5008 { 5009 return hash<typename shared_ptr<_Tp>::element_type*>()(__ptr.get()); 5010 } 5011}; 5012 5013template<class _CharT, class _Traits, class _Yp> 5014inline _LIBCPP_INLINE_VISIBILITY 5015basic_ostream<_CharT, _Traits>& 5016operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 5017 5018 5019#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5020 5021class _LIBCPP_TYPE_VIS __sp_mut 5022{ 5023 void* __lx; 5024public: 5025 void lock() _NOEXCEPT; 5026 void unlock() _NOEXCEPT; 5027 5028private: 5029 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 5030 __sp_mut(const __sp_mut&); 5031 __sp_mut& operator=(const __sp_mut&); 5032 5033 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 5034}; 5035 5036_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5037__sp_mut& __get_sp_mut(const void*); 5038 5039template <class _Tp> 5040inline _LIBCPP_INLINE_VISIBILITY 5041bool 5042atomic_is_lock_free(const shared_ptr<_Tp>*) 5043{ 5044 return false; 5045} 5046 5047template <class _Tp> 5048_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5049shared_ptr<_Tp> 5050atomic_load(const shared_ptr<_Tp>* __p) 5051{ 5052 __sp_mut& __m = __get_sp_mut(__p); 5053 __m.lock(); 5054 shared_ptr<_Tp> __q = *__p; 5055 __m.unlock(); 5056 return __q; 5057} 5058 5059template <class _Tp> 5060inline _LIBCPP_INLINE_VISIBILITY 5061_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5062shared_ptr<_Tp> 5063atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 5064{ 5065 return atomic_load(__p); 5066} 5067 5068template <class _Tp> 5069_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5070void 5071atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5072{ 5073 __sp_mut& __m = __get_sp_mut(__p); 5074 __m.lock(); 5075 __p->swap(__r); 5076 __m.unlock(); 5077} 5078 5079template <class _Tp> 5080inline _LIBCPP_INLINE_VISIBILITY 5081_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5082void 5083atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5084{ 5085 atomic_store(__p, __r); 5086} 5087 5088template <class _Tp> 5089_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5090shared_ptr<_Tp> 5091atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5092{ 5093 __sp_mut& __m = __get_sp_mut(__p); 5094 __m.lock(); 5095 __p->swap(__r); 5096 __m.unlock(); 5097 return __r; 5098} 5099 5100template <class _Tp> 5101inline _LIBCPP_INLINE_VISIBILITY 5102_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5103shared_ptr<_Tp> 5104atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5105{ 5106 return atomic_exchange(__p, __r); 5107} 5108 5109template <class _Tp> 5110_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5111bool 5112atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5113{ 5114 shared_ptr<_Tp> __temp; 5115 __sp_mut& __m = __get_sp_mut(__p); 5116 __m.lock(); 5117 if (__p->__owner_equivalent(*__v)) 5118 { 5119 _VSTD::swap(__temp, *__p); 5120 *__p = __w; 5121 __m.unlock(); 5122 return true; 5123 } 5124 _VSTD::swap(__temp, *__v); 5125 *__v = *__p; 5126 __m.unlock(); 5127 return false; 5128} 5129 5130template <class _Tp> 5131inline _LIBCPP_INLINE_VISIBILITY 5132_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5133bool 5134atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5135{ 5136 return atomic_compare_exchange_strong(__p, __v, __w); 5137} 5138 5139template <class _Tp> 5140inline _LIBCPP_INLINE_VISIBILITY 5141_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5142bool 5143atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5144 shared_ptr<_Tp> __w, memory_order, memory_order) 5145{ 5146 return atomic_compare_exchange_strong(__p, __v, __w); 5147} 5148 5149template <class _Tp> 5150inline _LIBCPP_INLINE_VISIBILITY 5151_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5152bool 5153atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5154 shared_ptr<_Tp> __w, memory_order, memory_order) 5155{ 5156 return atomic_compare_exchange_weak(__p, __v, __w); 5157} 5158 5159#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5160 5161//enum class 5162#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 5163# ifndef _LIBCPP_CXX03_LANG 5164enum class pointer_safety : unsigned char { 5165 relaxed, 5166 preferred, 5167 strict 5168}; 5169# endif 5170#else 5171struct _LIBCPP_TYPE_VIS pointer_safety 5172{ 5173 enum __lx 5174 { 5175 relaxed, 5176 preferred, 5177 strict 5178 }; 5179 5180 __lx __v_; 5181 5182 _LIBCPP_INLINE_VISIBILITY 5183 pointer_safety() : __v_() {} 5184 5185 _LIBCPP_INLINE_VISIBILITY 5186 pointer_safety(__lx __v) : __v_(__v) {} 5187 _LIBCPP_INLINE_VISIBILITY 5188 operator int() const {return __v_;} 5189}; 5190#endif 5191 5192#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 5193 defined(_LIBCPP_BUILDING_LIBRARY) 5194_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 5195#else 5196// This function is only offered in C++03 under ABI v1. 5197# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 5198inline _LIBCPP_INLINE_VISIBILITY 5199pointer_safety get_pointer_safety() _NOEXCEPT { 5200 return pointer_safety::relaxed; 5201} 5202# endif 5203#endif 5204 5205 5206_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 5207_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 5208_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 5209_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 5210 5211template <class _Tp> 5212inline _LIBCPP_INLINE_VISIBILITY 5213_Tp* 5214undeclare_reachable(_Tp* __p) 5215{ 5216 return static_cast<_Tp*>(__undeclare_reachable(__p)); 5217} 5218 5219_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 5220 5221// --- Helper for container swap -- 5222template <typename _Alloc> 5223inline _LIBCPP_INLINE_VISIBILITY 5224void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 5225#if _LIBCPP_STD_VER >= 14 5226 _NOEXCEPT 5227#else 5228 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5229#endif 5230{ 5231 __swap_allocator(__a1, __a2, 5232 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 5233} 5234 5235template <typename _Alloc> 5236_LIBCPP_INLINE_VISIBILITY 5237void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 5238#if _LIBCPP_STD_VER >= 14 5239 _NOEXCEPT 5240#else 5241 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5242#endif 5243{ 5244 using _VSTD::swap; 5245 swap(__a1, __a2); 5246} 5247 5248template <typename _Alloc> 5249inline _LIBCPP_INLINE_VISIBILITY 5250void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 5251 5252template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 5253struct __noexcept_move_assign_container : public integral_constant<bool, 5254 _Traits::propagate_on_container_move_assignment::value 5255#if _LIBCPP_STD_VER > 14 5256 || _Traits::is_always_equal::value 5257#else 5258 && is_nothrow_move_assignable<_Alloc>::value 5259#endif 5260 > {}; 5261 5262 5263#ifndef _LIBCPP_HAS_NO_VARIADICS 5264template <class _Tp, class _Alloc> 5265struct __temp_value { 5266 typedef allocator_traits<_Alloc> _Traits; 5267 5268 typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; 5269 _Alloc &__a; 5270 5271 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 5272 _Tp & get() { return *__addr(); } 5273 5274 template<class... _Args> 5275 _LIBCPP_NO_CFI 5276 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) { 5277 _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)), 5278 _VSTD::forward<_Args>(__args)...); 5279 } 5280 5281 ~__temp_value() { _Traits::destroy(__a, __addr()); } 5282 }; 5283#endif 5284 5285template<typename _Alloc, typename = void, typename = void> 5286struct __is_allocator : false_type {}; 5287 5288template<typename _Alloc> 5289struct __is_allocator<_Alloc, 5290 typename __void_t<typename _Alloc::value_type>::type, 5291 typename __void_t<decltype(_VSTD::declval<_Alloc&>().allocate(size_t(0)))>::type 5292 > 5293 : true_type {}; 5294 5295// __builtin_new_allocator -- A non-templated helper for allocating and 5296// deallocating memory using __builtin_operator_new and 5297// __builtin_operator_delete. It should be used in preference to 5298// `std::allocator<T>` to avoid additional instantiations. 5299struct __builtin_new_allocator { 5300 struct __builtin_new_deleter { 5301 typedef void* pointer_type; 5302 5303 _LIBCPP_CONSTEXPR explicit __builtin_new_deleter(size_t __size, size_t __align) 5304 : __size_(__size), __align_(__align) {} 5305 5306 void operator()(void* p) const _NOEXCEPT { 5307 std::__libcpp_deallocate(p, __size_, __align_); 5308 } 5309 5310 private: 5311 size_t __size_; 5312 size_t __align_; 5313 }; 5314 5315 typedef unique_ptr<void, __builtin_new_deleter> __holder_t; 5316 5317 static __holder_t __allocate_bytes(size_t __s, size_t __align) { 5318 return __holder_t(std::__libcpp_allocate(__s, __align), 5319 __builtin_new_deleter(__s, __align)); 5320 } 5321 5322 static void __deallocate_bytes(void* __p, size_t __s, 5323 size_t __align) _NOEXCEPT { 5324 std::__libcpp_deallocate(__p, __s, __align); 5325 } 5326 5327 template <class _Tp> 5328 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 5329 static __holder_t __allocate_type(size_t __n) { 5330 return __allocate_bytes(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 5331 } 5332 5333 template <class _Tp> 5334 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 5335 static void __deallocate_type(void* __p, size_t __n) _NOEXCEPT { 5336 __deallocate_bytes(__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 5337 } 5338}; 5339 5340 5341_LIBCPP_END_NAMESPACE_STD 5342 5343_LIBCPP_POP_MACROS 5344 5345#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17 5346# include <__pstl_memory> 5347#endif 5348 5349#endif // _LIBCPP_MEMORY 5350