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_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1356template <class _Alloc, class ..._Args, 1357 class = decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Args>()...))> 1358static true_type __test_has_construct(int); 1359_LIBCPP_SUPPRESS_DEPRECATED_POP 1360 1361template <class _Alloc, class...> 1362static false_type __test_has_construct(...); 1363 1364template <class _Alloc, class ..._Args> 1365struct __has_construct : decltype(__test_has_construct<_Alloc, _Args...>(0)) {}; 1366 1367#if !defined(_LIBCPP_CXX03_LANG) 1368 1369_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1370template <class _Alloc, class _Pointer> 1371auto 1372__has_destroy_test(_Alloc&& __a, _Pointer&& __p) 1373 -> decltype(__a.destroy(__p), true_type()); 1374_LIBCPP_SUPPRESS_DEPRECATED_POP 1375 1376template <class _Alloc, class _Pointer> 1377auto 1378__has_destroy_test(const _Alloc& __a, _Pointer&& __p) 1379 -> false_type; 1380 1381template <class _Alloc, class _Pointer> 1382struct __has_destroy 1383 : decltype(_VSTD::__has_destroy_test(declval<_Alloc>(), 1384 declval<_Pointer>())) 1385{ 1386}; 1387 1388_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1389template <class _Alloc> 1390auto 1391__has_max_size_test(_Alloc&& __a) 1392 -> decltype(__a.max_size(), true_type()); 1393_LIBCPP_SUPPRESS_DEPRECATED_POP 1394 1395template <class _Alloc> 1396auto 1397__has_max_size_test(const volatile _Alloc& __a) 1398 -> false_type; 1399 1400template <class _Alloc> 1401struct __has_max_size 1402 : decltype(_VSTD::__has_max_size_test(declval<_Alloc&>())) 1403{ 1404}; 1405 1406template <class _Alloc> 1407auto 1408__has_select_on_container_copy_construction_test(_Alloc&& __a) 1409 -> decltype(__a.select_on_container_copy_construction(), true_type()); 1410 1411template <class _Alloc> 1412auto 1413__has_select_on_container_copy_construction_test(const volatile _Alloc& __a) 1414 -> false_type; 1415 1416template <class _Alloc> 1417struct __has_select_on_container_copy_construction 1418 : decltype(_VSTD::__has_select_on_container_copy_construction_test(declval<_Alloc&>())) 1419{ 1420}; 1421 1422#else // _LIBCPP_CXX03_LANG 1423 1424template <class _Alloc, class _Pointer, class = void> 1425struct __has_destroy : false_type {}; 1426 1427template <class _Alloc, class _Pointer> 1428struct __has_destroy<_Alloc, _Pointer, typename __void_t< 1429 decltype(_VSTD::declval<_Alloc>().destroy(_VSTD::declval<_Pointer>())) 1430>::type> : std::true_type {}; 1431 1432template <class _Alloc> 1433struct __has_max_size 1434 : true_type 1435{ 1436}; 1437 1438template <class _Alloc> 1439struct __has_select_on_container_copy_construction 1440 : false_type 1441{ 1442}; 1443 1444#endif // _LIBCPP_CXX03_LANG 1445 1446template <class _Alloc, class _Ptr, bool = __has_difference_type<_Alloc>::value> 1447struct __alloc_traits_difference_type 1448{ 1449 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::difference_type type; 1450}; 1451 1452template <class _Alloc, class _Ptr> 1453struct __alloc_traits_difference_type<_Alloc, _Ptr, true> 1454{ 1455 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::difference_type type; 1456}; 1457 1458template <class _Tp> 1459struct __is_default_allocator : false_type {}; 1460 1461template <class _Tp> 1462struct __is_default_allocator<_VSTD::allocator<_Tp> > : true_type {}; 1463 1464 1465 1466template <class _Alloc, 1467 bool = __has_construct<_Alloc, typename _Alloc::value_type*, typename _Alloc::value_type&&>::value && !__is_default_allocator<_Alloc>::value 1468 > 1469struct __is_cpp17_move_insertable; 1470template <class _Alloc> 1471struct __is_cpp17_move_insertable<_Alloc, true> : std::true_type {}; 1472template <class _Alloc> 1473struct __is_cpp17_move_insertable<_Alloc, false> : std::is_move_constructible<typename _Alloc::value_type> {}; 1474 1475template <class _Alloc, 1476 bool = __has_construct<_Alloc, typename _Alloc::value_type*, const typename _Alloc::value_type&>::value && !__is_default_allocator<_Alloc>::value 1477 > 1478struct __is_cpp17_copy_insertable; 1479template <class _Alloc> 1480struct __is_cpp17_copy_insertable<_Alloc, true> : __is_cpp17_move_insertable<_Alloc> {}; 1481template <class _Alloc> 1482struct __is_cpp17_copy_insertable<_Alloc, false> : integral_constant<bool, 1483 std::is_copy_constructible<typename _Alloc::value_type>::value && 1484 __is_cpp17_move_insertable<_Alloc>::value> 1485 {}; 1486 1487 1488 1489template <class _Alloc> 1490struct _LIBCPP_TEMPLATE_VIS allocator_traits 1491{ 1492 typedef _Alloc allocator_type; 1493 typedef typename allocator_type::value_type value_type; 1494 1495 typedef typename __pointer_type<value_type, allocator_type>::type pointer; 1496 typedef typename __const_pointer<value_type, pointer, allocator_type>::type const_pointer; 1497 typedef typename __void_pointer<pointer, allocator_type>::type void_pointer; 1498 typedef typename __const_void_pointer<pointer, allocator_type>::type const_void_pointer; 1499 1500 typedef typename __alloc_traits_difference_type<allocator_type, pointer>::type difference_type; 1501 typedef typename __size_type<allocator_type, difference_type>::type size_type; 1502 1503 typedef typename __propagate_on_container_copy_assignment<allocator_type>::type 1504 propagate_on_container_copy_assignment; 1505 typedef typename __propagate_on_container_move_assignment<allocator_type>::type 1506 propagate_on_container_move_assignment; 1507 typedef typename __propagate_on_container_swap<allocator_type>::type 1508 propagate_on_container_swap; 1509 typedef typename __is_always_equal<allocator_type>::type 1510 is_always_equal; 1511 1512#ifndef _LIBCPP_CXX03_LANG 1513 template <class _Tp> using rebind_alloc = 1514 typename __allocator_traits_rebind<allocator_type, _Tp>::type; 1515 template <class _Tp> using rebind_traits = allocator_traits<rebind_alloc<_Tp> >; 1516#else // _LIBCPP_CXX03_LANG 1517 template <class _Tp> struct rebind_alloc 1518 {typedef typename __allocator_traits_rebind<allocator_type, _Tp>::type other;}; 1519 template <class _Tp> struct rebind_traits 1520 {typedef allocator_traits<typename rebind_alloc<_Tp>::other> other;}; 1521#endif // _LIBCPP_CXX03_LANG 1522 1523 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1524 static pointer allocate(allocator_type& __a, size_type __n) 1525 {return __a.allocate(__n);} 1526 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1527 static pointer allocate(allocator_type& __a, size_type __n, const_void_pointer __hint) 1528 {return __allocate(__a, __n, __hint, 1529 __has_allocate_hint<allocator_type, size_type, const_void_pointer>());} 1530 1531 _LIBCPP_INLINE_VISIBILITY 1532 static void deallocate(allocator_type& __a, pointer __p, size_type __n) _NOEXCEPT 1533 {__a.deallocate(__p, __n);} 1534 1535 template <class _Tp, class... _Args> 1536 _LIBCPP_INLINE_VISIBILITY 1537 static void construct(allocator_type& __a, _Tp* __p, _Args&&... __args) 1538 {__construct(__has_construct<allocator_type, _Tp*, _Args...>(), 1539 __a, __p, _VSTD::forward<_Args>(__args)...);} 1540 1541 template <class _Tp> 1542 _LIBCPP_INLINE_VISIBILITY 1543 static void destroy(allocator_type& __a, _Tp* __p) 1544 {__destroy(__has_destroy<allocator_type, _Tp*>(), __a, __p);} 1545 1546 _LIBCPP_INLINE_VISIBILITY 1547 static size_type max_size(const allocator_type& __a) _NOEXCEPT 1548 {return __max_size(__has_max_size<const allocator_type>(), __a);} 1549 1550 _LIBCPP_INLINE_VISIBILITY 1551 static allocator_type 1552 select_on_container_copy_construction(const allocator_type& __a) 1553 {return __select_on_container_copy_construction( 1554 __has_select_on_container_copy_construction<const allocator_type>(), 1555 __a);} 1556 1557 template <class _Ptr> 1558 _LIBCPP_INLINE_VISIBILITY 1559 static 1560 void 1561 __construct_forward_with_exception_guarantees(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) 1562 { 1563 static_assert(__is_cpp17_move_insertable<allocator_type>::value, 1564 "The specified type does not meet the requirements of Cpp17MoveInsertible"); 1565 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1566 construct(__a, _VSTD::__to_address(__begin2), 1567#ifdef _LIBCPP_NO_EXCEPTIONS 1568 _VSTD::move(*__begin1) 1569#else 1570 _VSTD::move_if_noexcept(*__begin1) 1571#endif 1572 ); 1573 } 1574 1575 template <class _Tp> 1576 _LIBCPP_INLINE_VISIBILITY 1577 static 1578 typename enable_if 1579 < 1580 (__is_default_allocator<allocator_type>::value 1581 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1582 is_trivially_move_constructible<_Tp>::value, 1583 void 1584 >::type 1585 __construct_forward_with_exception_guarantees(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) 1586 { 1587 ptrdiff_t _Np = __end1 - __begin1; 1588 if (_Np > 0) 1589 { 1590 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); 1591 __begin2 += _Np; 1592 } 1593 } 1594 1595 template <class _Iter, class _Ptr> 1596 _LIBCPP_INLINE_VISIBILITY 1597 static 1598 void 1599 __construct_range_forward(allocator_type& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) 1600 { 1601 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1602 construct(__a, _VSTD::__to_address(__begin2), *__begin1); 1603 } 1604 1605 template <class _SourceTp, class _DestTp, 1606 class _RawSourceTp = typename remove_const<_SourceTp>::type, 1607 class _RawDestTp = typename remove_const<_DestTp>::type> 1608 _LIBCPP_INLINE_VISIBILITY 1609 static 1610 typename enable_if 1611 < 1612 is_trivially_copy_constructible<_DestTp>::value && 1613 is_same<_RawSourceTp, _RawDestTp>::value && 1614 (__is_default_allocator<allocator_type>::value || 1615 !__has_construct<allocator_type, _DestTp*, _SourceTp&>::value), 1616 void 1617 >::type 1618 __construct_range_forward(allocator_type&, _SourceTp* __begin1, _SourceTp* __end1, _DestTp*& __begin2) 1619 { 1620 ptrdiff_t _Np = __end1 - __begin1; 1621 if (_Np > 0) 1622 { 1623 _VSTD::memcpy(const_cast<_RawDestTp*>(__begin2), __begin1, _Np * sizeof(_DestTp)); 1624 __begin2 += _Np; 1625 } 1626 } 1627 1628 template <class _Ptr> 1629 _LIBCPP_INLINE_VISIBILITY 1630 static 1631 void 1632 __construct_backward_with_exception_guarantees(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) 1633 { 1634 static_assert(__is_cpp17_move_insertable<allocator_type>::value, 1635 "The specified type does not meet the requirements of Cpp17MoveInsertable"); 1636 while (__end1 != __begin1) 1637 { 1638 construct(__a, _VSTD::__to_address(__end2 - 1), 1639#ifdef _LIBCPP_NO_EXCEPTIONS 1640 _VSTD::move(*--__end1) 1641#else 1642 _VSTD::move_if_noexcept(*--__end1) 1643#endif 1644 ); 1645 --__end2; 1646 } 1647 } 1648 1649 template <class _Tp> 1650 _LIBCPP_INLINE_VISIBILITY 1651 static 1652 typename enable_if 1653 < 1654 (__is_default_allocator<allocator_type>::value 1655 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1656 is_trivially_move_constructible<_Tp>::value, 1657 void 1658 >::type 1659 __construct_backward_with_exception_guarantees(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) 1660 { 1661 ptrdiff_t _Np = __end1 - __begin1; 1662 __end2 -= _Np; 1663 if (_Np > 0) 1664 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); 1665 } 1666 1667private: 1668 1669 _LIBCPP_INLINE_VISIBILITY 1670 static pointer __allocate(allocator_type& __a, size_type __n, 1671 const_void_pointer __hint, true_type) 1672 { 1673 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1674 return __a.allocate(__n, __hint); 1675 _LIBCPP_SUPPRESS_DEPRECATED_POP 1676 } 1677 _LIBCPP_INLINE_VISIBILITY 1678 static pointer __allocate(allocator_type& __a, size_type __n, 1679 const_void_pointer, false_type) 1680 {return __a.allocate(__n);} 1681 1682 template <class _Tp, class... _Args> 1683 _LIBCPP_INLINE_VISIBILITY 1684 static void __construct(true_type, allocator_type& __a, _Tp* __p, _Args&&... __args) 1685 { 1686 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1687 __a.construct(__p, _VSTD::forward<_Args>(__args)...); 1688 _LIBCPP_SUPPRESS_DEPRECATED_POP 1689 } 1690 1691 template <class _Tp, class... _Args> 1692 _LIBCPP_INLINE_VISIBILITY 1693 static void __construct(false_type, allocator_type&, _Tp* __p, _Args&&... __args) 1694 { 1695 ::new ((void*)__p) _Tp(_VSTD::forward<_Args>(__args)...); 1696 } 1697 1698 template <class _Tp> 1699 _LIBCPP_INLINE_VISIBILITY 1700 static void __destroy(true_type, allocator_type& __a, _Tp* __p) 1701 { 1702 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1703 __a.destroy(__p); 1704 _LIBCPP_SUPPRESS_DEPRECATED_POP 1705 } 1706 template <class _Tp> 1707 _LIBCPP_INLINE_VISIBILITY 1708 static void __destroy(false_type, allocator_type&, _Tp* __p) 1709 { 1710 __p->~_Tp(); 1711 } 1712 1713 _LIBCPP_INLINE_VISIBILITY 1714 static size_type __max_size(true_type, const allocator_type& __a) _NOEXCEPT 1715 { 1716 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1717 return __a.max_size(); 1718 _LIBCPP_SUPPRESS_DEPRECATED_POP 1719 } 1720 1721 _LIBCPP_INLINE_VISIBILITY 1722 static size_type __max_size(false_type, const allocator_type&) _NOEXCEPT 1723 {return numeric_limits<size_type>::max() / sizeof(value_type);} 1724 1725 _LIBCPP_INLINE_VISIBILITY 1726 static allocator_type 1727 __select_on_container_copy_construction(true_type, const allocator_type& __a) 1728 {return __a.select_on_container_copy_construction();} 1729 _LIBCPP_INLINE_VISIBILITY 1730 static allocator_type 1731 __select_on_container_copy_construction(false_type, const allocator_type& __a) 1732 {return __a;} 1733}; 1734 1735template <class _Traits, class _Tp> 1736struct __rebind_alloc_helper 1737{ 1738#ifndef _LIBCPP_CXX03_LANG 1739 typedef _LIBCPP_NODEBUG_TYPE typename _Traits::template rebind_alloc<_Tp> type; 1740#else 1741 typedef typename _Traits::template rebind_alloc<_Tp>::other type; 1742#endif 1743}; 1744 1745// allocator 1746 1747template <class _Tp> 1748class _LIBCPP_TEMPLATE_VIS allocator 1749{ 1750public: 1751#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1752 _LIBCPP_DEPRECATED_IN_CXX17 typedef size_t size_type; 1753 _LIBCPP_DEPRECATED_IN_CXX17 typedef ptrdiff_t difference_type; 1754 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp* pointer; 1755 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 1756 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp& reference; 1757 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 1758 1759 template <class _Up> struct _LIBCPP_DEPRECATED_IN_CXX17 rebind {typedef allocator<_Up> other;}; 1760#endif 1761 1762 typedef _Tp value_type; 1763 1764 typedef true_type propagate_on_container_move_assignment; 1765 typedef true_type is_always_equal; 1766 1767 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1768 allocator() _NOEXCEPT {} 1769 1770 template <class _Up> 1771 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1772 allocator(const allocator<_Up>&) _NOEXCEPT {} 1773 1774#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1775 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1776 pointer address(reference __x) const _NOEXCEPT 1777 {return _VSTD::addressof(__x);} 1778 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1779 const_pointer address(const_reference __x) const _NOEXCEPT 1780 {return _VSTD::addressof(__x);} 1781#endif 1782 1783 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _Tp* allocate(size_t __n) 1784 { 1785 // TODO(mpark): Replace with `allocator_traits<allocator>::max_size(*this)`. 1786 if (__n > (size_t(~0) / sizeof(_Tp))) 1787 __throw_length_error("allocator<T>::allocate(size_t n)" 1788 " 'n' exceeds maximum supported size"); 1789 return static_cast<_Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1790 } 1791 1792#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1793 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 1794 _Tp* allocate(size_t __n, const void*) { return allocate(__n); } 1795#endif 1796 1797 _LIBCPP_INLINE_VISIBILITY void deallocate(_Tp* __p, size_t __n) _NOEXCEPT 1798 {_VSTD::__libcpp_deallocate((void*)__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));} 1799 1800#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1801 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1802 {return size_type(~0) / sizeof(_Tp);} 1803 1804 template <class _Up, class... _Args> 1805 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1806 void 1807 construct(_Up* __p, _Args&&... __args) 1808 { 1809 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1810 } 1811 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1812#endif 1813}; 1814 1815template <class _Tp> 1816class _LIBCPP_TEMPLATE_VIS allocator<const _Tp> 1817{ 1818public: 1819#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1820 _LIBCPP_DEPRECATED_IN_CXX17 typedef size_t size_type; 1821 _LIBCPP_DEPRECATED_IN_CXX17 typedef ptrdiff_t difference_type; 1822 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* pointer; 1823 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 1824 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& reference; 1825 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 1826 1827 template <class _Up> struct _LIBCPP_DEPRECATED_IN_CXX17 rebind {typedef allocator<_Up> other;}; 1828#endif 1829 1830 typedef const _Tp value_type; 1831 1832 typedef true_type propagate_on_container_move_assignment; 1833 typedef true_type is_always_equal; 1834 1835 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1836 allocator() _NOEXCEPT {} 1837 1838 template <class _Up> 1839 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1840 allocator(const allocator<_Up>&) _NOEXCEPT {} 1841 1842#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1843 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1844 const_pointer address(const_reference __x) const _NOEXCEPT 1845 {return _VSTD::addressof(__x);} 1846#endif 1847 1848 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY const _Tp* allocate(size_t __n) 1849 { 1850 // TODO(mpark): Replace with `allocator_traits<allocator>::max_size(*this)`. 1851 if (__n > (size_t(~0) / sizeof(_Tp))) 1852 __throw_length_error("allocator<const T>::allocate(size_t n)" 1853 " 'n' exceeds maximum supported size"); 1854 return static_cast<const _Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1855 } 1856 1857#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1858 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 1859 const _Tp* allocate(size_t __n, const void*) { return allocate(__n); } 1860#endif 1861 1862 _LIBCPP_INLINE_VISIBILITY void deallocate(const _Tp* __p, size_t __n) 1863 {_VSTD::__libcpp_deallocate((void*) const_cast<_Tp *>(__p), __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));} 1864 1865#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1866 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1867 {return size_type(~0) / sizeof(_Tp);} 1868 1869#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1870 template <class _Up, class... _Args> 1871 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1872 void 1873 construct(_Up* __p, _Args&&... __args) 1874 { 1875 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1876 } 1877#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1878 _LIBCPP_INLINE_VISIBILITY 1879 void 1880 construct(pointer __p) 1881 { 1882 ::new((void*) const_cast<_Tp *>(__p)) _Tp(); 1883 } 1884# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1885 1886 template <class _A0> 1887 _LIBCPP_INLINE_VISIBILITY 1888 void 1889 construct(pointer __p, _A0& __a0) 1890 { 1891 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0); 1892 } 1893 template <class _A0> 1894 _LIBCPP_INLINE_VISIBILITY 1895 void 1896 construct(pointer __p, const _A0& __a0) 1897 { 1898 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0); 1899 } 1900# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1901 template <class _A0, class _A1> 1902 _LIBCPP_INLINE_VISIBILITY 1903 void 1904 construct(pointer __p, _A0& __a0, _A1& __a1) 1905 { 1906 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1907 } 1908 template <class _A0, class _A1> 1909 _LIBCPP_INLINE_VISIBILITY 1910 void 1911 construct(pointer __p, const _A0& __a0, _A1& __a1) 1912 { 1913 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1914 } 1915 template <class _A0, class _A1> 1916 _LIBCPP_INLINE_VISIBILITY 1917 void 1918 construct(pointer __p, _A0& __a0, const _A1& __a1) 1919 { 1920 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1921 } 1922 template <class _A0, class _A1> 1923 _LIBCPP_INLINE_VISIBILITY 1924 void 1925 construct(pointer __p, const _A0& __a0, const _A1& __a1) 1926 { 1927 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1928 } 1929#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1930 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1931#endif 1932}; 1933 1934template <class _Tp, class _Up> 1935inline _LIBCPP_INLINE_VISIBILITY 1936bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;} 1937 1938template <class _Tp, class _Up> 1939inline _LIBCPP_INLINE_VISIBILITY 1940bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;} 1941 1942template <class _OutputIterator, class _Tp> 1943class _LIBCPP_TEMPLATE_VIS raw_storage_iterator 1944 : public iterator<output_iterator_tag, 1945 _Tp, // purposefully not C++03 1946 ptrdiff_t, // purposefully not C++03 1947 _Tp*, // purposefully not C++03 1948 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03 1949{ 1950private: 1951 _OutputIterator __x_; 1952public: 1953 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {} 1954 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;} 1955 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element) 1956 {::new(_VSTD::addressof(*__x_)) _Tp(__element); return *this;} 1957#if _LIBCPP_STD_VER >= 14 1958 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element) 1959 {::new(_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;} 1960#endif 1961 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;} 1962 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int) 1963 {raw_storage_iterator __t(*this); ++__x_; return __t;} 1964#if _LIBCPP_STD_VER >= 14 1965 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; } 1966#endif 1967}; 1968 1969template <class _Tp> 1970_LIBCPP_NODISCARD_EXT _LIBCPP_NO_CFI 1971pair<_Tp*, ptrdiff_t> 1972get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT 1973{ 1974 pair<_Tp*, ptrdiff_t> __r(0, 0); 1975 const ptrdiff_t __m = (~ptrdiff_t(0) ^ 1976 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1))) 1977 / sizeof(_Tp); 1978 if (__n > __m) 1979 __n = __m; 1980 while (__n > 0) 1981 { 1982#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) 1983 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 1984 { 1985 std::align_val_t __al = 1986 std::align_val_t(std::alignment_of<_Tp>::value); 1987 __r.first = static_cast<_Tp*>(::operator new( 1988 __n * sizeof(_Tp), __al, nothrow)); 1989 } else { 1990 __r.first = static_cast<_Tp*>(::operator new( 1991 __n * sizeof(_Tp), nothrow)); 1992 } 1993#else 1994 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 1995 { 1996 // Since aligned operator new is unavailable, return an empty 1997 // buffer rather than one with invalid alignment. 1998 return __r; 1999 } 2000 2001 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow)); 2002#endif 2003 2004 if (__r.first) 2005 { 2006 __r.second = __n; 2007 break; 2008 } 2009 __n /= 2; 2010 } 2011 return __r; 2012} 2013 2014template <class _Tp> 2015inline _LIBCPP_INLINE_VISIBILITY 2016void return_temporary_buffer(_Tp* __p) _NOEXCEPT 2017{ 2018 _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp)); 2019} 2020 2021#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2022template <class _Tp> 2023struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref 2024{ 2025 _Tp* __ptr_; 2026}; 2027 2028template<class _Tp> 2029class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr 2030{ 2031private: 2032 _Tp* __ptr_; 2033public: 2034 typedef _Tp element_type; 2035 2036 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} 2037 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} 2038 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT 2039 : __ptr_(__p.release()) {} 2040 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT 2041 {reset(__p.release()); return *this;} 2042 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT 2043 {reset(__p.release()); return *this;} 2044 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT 2045 {reset(__p.__ptr_); return *this;} 2046 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() _NOEXCEPT {delete __ptr_;} 2047 2048 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const _NOEXCEPT 2049 {return *__ptr_;} 2050 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const _NOEXCEPT {return __ptr_;} 2051 _LIBCPP_INLINE_VISIBILITY _Tp* get() const _NOEXCEPT {return __ptr_;} 2052 _LIBCPP_INLINE_VISIBILITY _Tp* release() _NOEXCEPT 2053 { 2054 _Tp* __t = __ptr_; 2055 __ptr_ = 0; 2056 return __t; 2057 } 2058 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) _NOEXCEPT 2059 { 2060 if (__ptr_ != __p) 2061 delete __ptr_; 2062 __ptr_ = __p; 2063 } 2064 2065 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} 2066 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() _NOEXCEPT 2067 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 2068 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() _NOEXCEPT 2069 {return auto_ptr<_Up>(release());} 2070}; 2071 2072template <> 2073class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> 2074{ 2075public: 2076 typedef void element_type; 2077}; 2078#endif 2079 2080// Tag used to default initialize one or both of the pair's elements. 2081struct __default_init_tag {}; 2082struct __value_init_tag {}; 2083 2084template <class _Tp, int _Idx, 2085 bool _CanBeEmptyBase = 2086 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value> 2087struct __compressed_pair_elem { 2088 typedef _Tp _ParamT; 2089 typedef _Tp& reference; 2090 typedef const _Tp& const_reference; 2091 2092 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2093 __compressed_pair_elem(__default_init_tag) {} 2094 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2095 __compressed_pair_elem(__value_init_tag) : __value_() {} 2096 2097 template <class _Up, class = typename enable_if< 2098 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2099 >::type> 2100 _LIBCPP_INLINE_VISIBILITY 2101 _LIBCPP_CONSTEXPR explicit 2102 __compressed_pair_elem(_Up&& __u) 2103 : __value_(_VSTD::forward<_Up>(__u)) 2104 { 2105 } 2106 2107 2108#ifndef _LIBCPP_CXX03_LANG 2109 template <class... _Args, size_t... _Indexes> 2110 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2111 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2112 __tuple_indices<_Indexes...>) 2113 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2114#endif 2115 2116 2117 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; } 2118 _LIBCPP_INLINE_VISIBILITY 2119 const_reference __get() const _NOEXCEPT { return __value_; } 2120 2121private: 2122 _Tp __value_; 2123}; 2124 2125template <class _Tp, int _Idx> 2126struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { 2127 typedef _Tp _ParamT; 2128 typedef _Tp& reference; 2129 typedef const _Tp& const_reference; 2130 typedef _Tp __value_type; 2131 2132 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __compressed_pair_elem() = default; 2133 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2134 __compressed_pair_elem(__default_init_tag) {} 2135 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2136 __compressed_pair_elem(__value_init_tag) : __value_type() {} 2137 2138 template <class _Up, class = typename enable_if< 2139 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2140 >::type> 2141 _LIBCPP_INLINE_VISIBILITY 2142 _LIBCPP_CONSTEXPR explicit 2143 __compressed_pair_elem(_Up&& __u) 2144 : __value_type(_VSTD::forward<_Up>(__u)) 2145 {} 2146 2147#ifndef _LIBCPP_CXX03_LANG 2148 template <class... _Args, size_t... _Indexes> 2149 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2150 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2151 __tuple_indices<_Indexes...>) 2152 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2153#endif 2154 2155 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; } 2156 _LIBCPP_INLINE_VISIBILITY 2157 const_reference __get() const _NOEXCEPT { return *this; } 2158}; 2159 2160template <class _T1, class _T2> 2161class __compressed_pair : private __compressed_pair_elem<_T1, 0>, 2162 private __compressed_pair_elem<_T2, 1> { 2163 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T1, 0> _Base1; 2164 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T2, 1> _Base2; 2165 2166 // NOTE: This static assert should never fire because __compressed_pair 2167 // is *almost never* used in a scenario where it's possible for T1 == T2. 2168 // (The exception is std::function where it is possible that the function 2169 // object and the allocator have the same type). 2170 static_assert((!is_same<_T1, _T2>::value), 2171 "__compressed_pair cannot be instantated when T1 and T2 are the same type; " 2172 "The current implementation is NOT ABI-compatible with the previous " 2173 "implementation for this configuration"); 2174 2175public: 2176 template <bool _Dummy = true, 2177 class = typename enable_if< 2178 __dependent_type<is_default_constructible<_T1>, _Dummy>::value && 2179 __dependent_type<is_default_constructible<_T2>, _Dummy>::value 2180 >::type 2181 > 2182 _LIBCPP_INLINE_VISIBILITY 2183 _LIBCPP_CONSTEXPR __compressed_pair() : _Base1(__value_init_tag()), _Base2(__value_init_tag()) {} 2184 2185 template <class _U1, class _U2> 2186 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2187 __compressed_pair(_U1&& __t1, _U2&& __t2) 2188 : _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {} 2189 2190#ifndef _LIBCPP_CXX03_LANG 2191 template <class... _Args1, class... _Args2> 2192 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2193 __compressed_pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args, 2194 tuple<_Args2...> __second_args) 2195 : _Base1(__pc, _VSTD::move(__first_args), 2196 typename __make_tuple_indices<sizeof...(_Args1)>::type()), 2197 _Base2(__pc, _VSTD::move(__second_args), 2198 typename __make_tuple_indices<sizeof...(_Args2)>::type()) {} 2199#endif 2200 2201 _LIBCPP_INLINE_VISIBILITY 2202 typename _Base1::reference first() _NOEXCEPT { 2203 return static_cast<_Base1&>(*this).__get(); 2204 } 2205 2206 _LIBCPP_INLINE_VISIBILITY 2207 typename _Base1::const_reference first() const _NOEXCEPT { 2208 return static_cast<_Base1 const&>(*this).__get(); 2209 } 2210 2211 _LIBCPP_INLINE_VISIBILITY 2212 typename _Base2::reference second() _NOEXCEPT { 2213 return static_cast<_Base2&>(*this).__get(); 2214 } 2215 2216 _LIBCPP_INLINE_VISIBILITY 2217 typename _Base2::const_reference second() const _NOEXCEPT { 2218 return static_cast<_Base2 const&>(*this).__get(); 2219 } 2220 2221 _LIBCPP_INLINE_VISIBILITY 2222 void swap(__compressed_pair& __x) 2223 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2224 __is_nothrow_swappable<_T2>::value) 2225 { 2226 using std::swap; 2227 swap(first(), __x.first()); 2228 swap(second(), __x.second()); 2229 } 2230}; 2231 2232template <class _T1, class _T2> 2233inline _LIBCPP_INLINE_VISIBILITY 2234void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) 2235 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2236 __is_nothrow_swappable<_T2>::value) { 2237 __x.swap(__y); 2238} 2239 2240// default_delete 2241 2242template <class _Tp> 2243struct _LIBCPP_TEMPLATE_VIS default_delete { 2244 static_assert(!is_function<_Tp>::value, 2245 "default_delete cannot be instantiated for function types"); 2246#ifndef _LIBCPP_CXX03_LANG 2247 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 2248#else 2249 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2250#endif 2251 template <class _Up> 2252 _LIBCPP_INLINE_VISIBILITY 2253 default_delete(const default_delete<_Up>&, 2254 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 2255 0) _NOEXCEPT {} 2256 2257 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 2258 static_assert(sizeof(_Tp) > 0, 2259 "default_delete can not delete incomplete type"); 2260 static_assert(!is_void<_Tp>::value, 2261 "default_delete can not delete incomplete type"); 2262 delete __ptr; 2263 } 2264}; 2265 2266template <class _Tp> 2267struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 2268private: 2269 template <class _Up> 2270 struct _EnableIfConvertible 2271 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 2272 2273public: 2274#ifndef _LIBCPP_CXX03_LANG 2275 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 2276#else 2277 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2278#endif 2279 2280 template <class _Up> 2281 _LIBCPP_INLINE_VISIBILITY 2282 default_delete(const default_delete<_Up[]>&, 2283 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 2284 2285 template <class _Up> 2286 _LIBCPP_INLINE_VISIBILITY 2287 typename _EnableIfConvertible<_Up>::type 2288 operator()(_Up* __ptr) const _NOEXCEPT { 2289 static_assert(sizeof(_Tp) > 0, 2290 "default_delete can not delete incomplete type"); 2291 static_assert(!is_void<_Tp>::value, 2292 "default_delete can not delete void type"); 2293 delete[] __ptr; 2294 } 2295}; 2296 2297template <class _Deleter> 2298struct __unique_ptr_deleter_sfinae { 2299 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 2300 typedef const _Deleter& __lval_ref_type; 2301 typedef _Deleter&& __good_rval_ref_type; 2302 typedef true_type __enable_rval_overload; 2303}; 2304 2305template <class _Deleter> 2306struct __unique_ptr_deleter_sfinae<_Deleter const&> { 2307 typedef const _Deleter& __lval_ref_type; 2308 typedef const _Deleter&& __bad_rval_ref_type; 2309 typedef false_type __enable_rval_overload; 2310}; 2311 2312template <class _Deleter> 2313struct __unique_ptr_deleter_sfinae<_Deleter&> { 2314 typedef _Deleter& __lval_ref_type; 2315 typedef _Deleter&& __bad_rval_ref_type; 2316 typedef false_type __enable_rval_overload; 2317}; 2318 2319template <class _Tp, class _Dp = default_delete<_Tp> > 2320class _LIBCPP_TEMPLATE_VIS unique_ptr { 2321public: 2322 typedef _Tp element_type; 2323 typedef _Dp deleter_type; 2324 typedef _LIBCPP_NODEBUG_TYPE typename __pointer_type<_Tp, deleter_type>::type pointer; 2325 2326 static_assert(!is_rvalue_reference<deleter_type>::value, 2327 "the specified deleter type cannot be an rvalue reference"); 2328 2329private: 2330 __compressed_pair<pointer, deleter_type> __ptr_; 2331 2332 struct __nat { int __for_bool_; }; 2333 2334 typedef _LIBCPP_NODEBUG_TYPE __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2335 2336 template <bool _Dummy> 2337 using _LValRefType _LIBCPP_NODEBUG_TYPE = 2338 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2339 2340 template <bool _Dummy> 2341 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 2342 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2343 2344 template <bool _Dummy> 2345 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 2346 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2347 2348 template <bool _Dummy, class _Deleter = typename __dependent_type< 2349 __identity<deleter_type>, _Dummy>::type> 2350 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 2351 typename enable_if<is_default_constructible<_Deleter>::value && 2352 !is_pointer<_Deleter>::value>::type; 2353 2354 template <class _ArgType> 2355 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 2356 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2357 2358 template <class _UPtr, class _Up> 2359 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2360 is_convertible<typename _UPtr::pointer, pointer>::value && 2361 !is_array<_Up>::value 2362 >::type; 2363 2364 template <class _UDel> 2365 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2366 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2367 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2368 >::type; 2369 2370 template <class _UDel> 2371 using _EnableIfDeleterAssignable = typename enable_if< 2372 is_assignable<_Dp&, _UDel&&>::value 2373 >::type; 2374 2375public: 2376 template <bool _Dummy = true, 2377 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2378 _LIBCPP_INLINE_VISIBILITY 2379 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2380 2381 template <bool _Dummy = true, 2382 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2383 _LIBCPP_INLINE_VISIBILITY 2384 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2385 2386 template <bool _Dummy = true, 2387 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2388 _LIBCPP_INLINE_VISIBILITY 2389 explicit unique_ptr(pointer __p) _NOEXCEPT : __ptr_(__p, __default_init_tag()) {} 2390 2391 template <bool _Dummy = true, 2392 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 2393 _LIBCPP_INLINE_VISIBILITY 2394 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) _NOEXCEPT 2395 : __ptr_(__p, __d) {} 2396 2397 template <bool _Dummy = true, 2398 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 2399 _LIBCPP_INLINE_VISIBILITY 2400 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2401 : __ptr_(__p, _VSTD::move(__d)) { 2402 static_assert(!is_reference<deleter_type>::value, 2403 "rvalue deleter bound to reference"); 2404 } 2405 2406 template <bool _Dummy = true, 2407 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> > > 2408 _LIBCPP_INLINE_VISIBILITY 2409 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 2410 2411 _LIBCPP_INLINE_VISIBILITY 2412 unique_ptr(unique_ptr&& __u) _NOEXCEPT 2413 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2414 } 2415 2416 template <class _Up, class _Ep, 2417 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2418 class = _EnableIfDeleterConvertible<_Ep> 2419 > 2420 _LIBCPP_INLINE_VISIBILITY 2421 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2422 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 2423 2424#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2425 template <class _Up> 2426 _LIBCPP_INLINE_VISIBILITY 2427 unique_ptr(auto_ptr<_Up>&& __p, 2428 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2429 is_same<_Dp, default_delete<_Tp> >::value, 2430 __nat>::type = __nat()) _NOEXCEPT 2431 : __ptr_(__p.release(), __default_init_tag()) {} 2432#endif 2433 2434 _LIBCPP_INLINE_VISIBILITY 2435 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2436 reset(__u.release()); 2437 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2438 return *this; 2439 } 2440 2441 template <class _Up, class _Ep, 2442 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2443 class = _EnableIfDeleterAssignable<_Ep> 2444 > 2445 _LIBCPP_INLINE_VISIBILITY 2446 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2447 reset(__u.release()); 2448 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2449 return *this; 2450 } 2451 2452#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2453 template <class _Up> 2454 _LIBCPP_INLINE_VISIBILITY 2455 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2456 is_same<_Dp, default_delete<_Tp> >::value, 2457 unique_ptr&>::type 2458 operator=(auto_ptr<_Up> __p) { 2459 reset(__p.release()); 2460 return *this; 2461 } 2462#endif 2463 2464#ifdef _LIBCPP_CXX03_LANG 2465 unique_ptr(unique_ptr const&) = delete; 2466 unique_ptr& operator=(unique_ptr const&) = delete; 2467#endif 2468 2469 2470 _LIBCPP_INLINE_VISIBILITY 2471 ~unique_ptr() { reset(); } 2472 2473 _LIBCPP_INLINE_VISIBILITY 2474 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2475 reset(); 2476 return *this; 2477 } 2478 2479 _LIBCPP_INLINE_VISIBILITY 2480 typename add_lvalue_reference<_Tp>::type 2481 operator*() const { 2482 return *__ptr_.first(); 2483 } 2484 _LIBCPP_INLINE_VISIBILITY 2485 pointer operator->() const _NOEXCEPT { 2486 return __ptr_.first(); 2487 } 2488 _LIBCPP_INLINE_VISIBILITY 2489 pointer get() const _NOEXCEPT { 2490 return __ptr_.first(); 2491 } 2492 _LIBCPP_INLINE_VISIBILITY 2493 deleter_type& get_deleter() _NOEXCEPT { 2494 return __ptr_.second(); 2495 } 2496 _LIBCPP_INLINE_VISIBILITY 2497 const deleter_type& get_deleter() const _NOEXCEPT { 2498 return __ptr_.second(); 2499 } 2500 _LIBCPP_INLINE_VISIBILITY 2501 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2502 return __ptr_.first() != nullptr; 2503 } 2504 2505 _LIBCPP_INLINE_VISIBILITY 2506 pointer release() _NOEXCEPT { 2507 pointer __t = __ptr_.first(); 2508 __ptr_.first() = pointer(); 2509 return __t; 2510 } 2511 2512 _LIBCPP_INLINE_VISIBILITY 2513 void reset(pointer __p = pointer()) _NOEXCEPT { 2514 pointer __tmp = __ptr_.first(); 2515 __ptr_.first() = __p; 2516 if (__tmp) 2517 __ptr_.second()(__tmp); 2518 } 2519 2520 _LIBCPP_INLINE_VISIBILITY 2521 void swap(unique_ptr& __u) _NOEXCEPT { 2522 __ptr_.swap(__u.__ptr_); 2523 } 2524}; 2525 2526 2527template <class _Tp, class _Dp> 2528class _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 2529public: 2530 typedef _Tp element_type; 2531 typedef _Dp deleter_type; 2532 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2533 2534private: 2535 __compressed_pair<pointer, deleter_type> __ptr_; 2536 2537 template <class _From> 2538 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 2539 2540 template <class _FromElem> 2541 struct _CheckArrayPointerConversion<_FromElem*> 2542 : integral_constant<bool, 2543 is_same<_FromElem*, pointer>::value || 2544 (is_same<pointer, element_type*>::value && 2545 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 2546 > 2547 {}; 2548 2549 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2550 2551 template <bool _Dummy> 2552 using _LValRefType _LIBCPP_NODEBUG_TYPE = 2553 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2554 2555 template <bool _Dummy> 2556 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 2557 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2558 2559 template <bool _Dummy> 2560 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 2561 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2562 2563 template <bool _Dummy, class _Deleter = typename __dependent_type< 2564 __identity<deleter_type>, _Dummy>::type> 2565 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 2566 typename enable_if<is_default_constructible<_Deleter>::value && 2567 !is_pointer<_Deleter>::value>::type; 2568 2569 template <class _ArgType> 2570 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 2571 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2572 2573 template <class _Pp> 2574 using _EnableIfPointerConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2575 _CheckArrayPointerConversion<_Pp>::value 2576 >::type; 2577 2578 template <class _UPtr, class _Up, 2579 class _ElemT = typename _UPtr::element_type> 2580 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2581 is_array<_Up>::value && 2582 is_same<pointer, element_type*>::value && 2583 is_same<typename _UPtr::pointer, _ElemT*>::value && 2584 is_convertible<_ElemT(*)[], element_type(*)[]>::value 2585 >::type; 2586 2587 template <class _UDel> 2588 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2589 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2590 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2591 >::type; 2592 2593 template <class _UDel> 2594 using _EnableIfDeleterAssignable _LIBCPP_NODEBUG_TYPE = typename enable_if< 2595 is_assignable<_Dp&, _UDel&&>::value 2596 >::type; 2597 2598public: 2599 template <bool _Dummy = true, 2600 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2601 _LIBCPP_INLINE_VISIBILITY 2602 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2603 2604 template <bool _Dummy = true, 2605 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2606 _LIBCPP_INLINE_VISIBILITY 2607 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2608 2609 template <class _Pp, bool _Dummy = true, 2610 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 2611 class = _EnableIfPointerConvertible<_Pp> > 2612 _LIBCPP_INLINE_VISIBILITY 2613 explicit unique_ptr(_Pp __p) _NOEXCEPT 2614 : __ptr_(__p, __default_init_tag()) {} 2615 2616 template <class _Pp, bool _Dummy = true, 2617 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> >, 2618 class = _EnableIfPointerConvertible<_Pp> > 2619 _LIBCPP_INLINE_VISIBILITY 2620 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) _NOEXCEPT 2621 : __ptr_(__p, __d) {} 2622 2623 template <bool _Dummy = true, 2624 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 2625 _LIBCPP_INLINE_VISIBILITY 2626 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) _NOEXCEPT 2627 : __ptr_(nullptr, __d) {} 2628 2629 template <class _Pp, bool _Dummy = true, 2630 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> >, 2631 class = _EnableIfPointerConvertible<_Pp> > 2632 _LIBCPP_INLINE_VISIBILITY 2633 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2634 : __ptr_(__p, _VSTD::move(__d)) { 2635 static_assert(!is_reference<deleter_type>::value, 2636 "rvalue deleter bound to reference"); 2637 } 2638 2639 template <bool _Dummy = true, 2640 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 2641 _LIBCPP_INLINE_VISIBILITY 2642 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2643 : __ptr_(nullptr, _VSTD::move(__d)) { 2644 static_assert(!is_reference<deleter_type>::value, 2645 "rvalue deleter bound to reference"); 2646 } 2647 2648 template <class _Pp, bool _Dummy = true, 2649 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> >, 2650 class = _EnableIfPointerConvertible<_Pp> > 2651 _LIBCPP_INLINE_VISIBILITY 2652 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 2653 2654 _LIBCPP_INLINE_VISIBILITY 2655 unique_ptr(unique_ptr&& __u) _NOEXCEPT 2656 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2657 } 2658 2659 _LIBCPP_INLINE_VISIBILITY 2660 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2661 reset(__u.release()); 2662 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2663 return *this; 2664 } 2665 2666 template <class _Up, class _Ep, 2667 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2668 class = _EnableIfDeleterConvertible<_Ep> 2669 > 2670 _LIBCPP_INLINE_VISIBILITY 2671 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2672 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 2673 } 2674 2675 template <class _Up, class _Ep, 2676 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2677 class = _EnableIfDeleterAssignable<_Ep> 2678 > 2679 _LIBCPP_INLINE_VISIBILITY 2680 unique_ptr& 2681 operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2682 reset(__u.release()); 2683 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2684 return *this; 2685 } 2686 2687#ifdef _LIBCPP_CXX03_LANG 2688 unique_ptr(unique_ptr const&) = delete; 2689 unique_ptr& operator=(unique_ptr const&) = delete; 2690#endif 2691 2692public: 2693 _LIBCPP_INLINE_VISIBILITY 2694 ~unique_ptr() { reset(); } 2695 2696 _LIBCPP_INLINE_VISIBILITY 2697 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2698 reset(); 2699 return *this; 2700 } 2701 2702 _LIBCPP_INLINE_VISIBILITY 2703 typename add_lvalue_reference<_Tp>::type 2704 operator[](size_t __i) const { 2705 return __ptr_.first()[__i]; 2706 } 2707 _LIBCPP_INLINE_VISIBILITY 2708 pointer get() const _NOEXCEPT { 2709 return __ptr_.first(); 2710 } 2711 2712 _LIBCPP_INLINE_VISIBILITY 2713 deleter_type& get_deleter() _NOEXCEPT { 2714 return __ptr_.second(); 2715 } 2716 2717 _LIBCPP_INLINE_VISIBILITY 2718 const deleter_type& get_deleter() const _NOEXCEPT { 2719 return __ptr_.second(); 2720 } 2721 _LIBCPP_INLINE_VISIBILITY 2722 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2723 return __ptr_.first() != nullptr; 2724 } 2725 2726 _LIBCPP_INLINE_VISIBILITY 2727 pointer release() _NOEXCEPT { 2728 pointer __t = __ptr_.first(); 2729 __ptr_.first() = pointer(); 2730 return __t; 2731 } 2732 2733 template <class _Pp> 2734 _LIBCPP_INLINE_VISIBILITY 2735 typename enable_if< 2736 _CheckArrayPointerConversion<_Pp>::value 2737 >::type 2738 reset(_Pp __p) _NOEXCEPT { 2739 pointer __tmp = __ptr_.first(); 2740 __ptr_.first() = __p; 2741 if (__tmp) 2742 __ptr_.second()(__tmp); 2743 } 2744 2745 _LIBCPP_INLINE_VISIBILITY 2746 void reset(nullptr_t = nullptr) _NOEXCEPT { 2747 pointer __tmp = __ptr_.first(); 2748 __ptr_.first() = nullptr; 2749 if (__tmp) 2750 __ptr_.second()(__tmp); 2751 } 2752 2753 _LIBCPP_INLINE_VISIBILITY 2754 void swap(unique_ptr& __u) _NOEXCEPT { 2755 __ptr_.swap(__u.__ptr_); 2756 } 2757 2758}; 2759 2760template <class _Tp, class _Dp> 2761inline _LIBCPP_INLINE_VISIBILITY 2762typename enable_if< 2763 __is_swappable<_Dp>::value, 2764 void 2765>::type 2766swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 2767 2768template <class _T1, class _D1, class _T2, class _D2> 2769inline _LIBCPP_INLINE_VISIBILITY 2770bool 2771operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 2772 2773template <class _T1, class _D1, class _T2, class _D2> 2774inline _LIBCPP_INLINE_VISIBILITY 2775bool 2776operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 2777 2778template <class _T1, class _D1, class _T2, class _D2> 2779inline _LIBCPP_INLINE_VISIBILITY 2780bool 2781operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 2782{ 2783 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2784 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 2785 typedef typename common_type<_P1, _P2>::type _Vp; 2786 return less<_Vp>()(__x.get(), __y.get()); 2787} 2788 2789template <class _T1, class _D1, class _T2, class _D2> 2790inline _LIBCPP_INLINE_VISIBILITY 2791bool 2792operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 2793 2794template <class _T1, class _D1, class _T2, class _D2> 2795inline _LIBCPP_INLINE_VISIBILITY 2796bool 2797operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 2798 2799template <class _T1, class _D1, class _T2, class _D2> 2800inline _LIBCPP_INLINE_VISIBILITY 2801bool 2802operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 2803 2804template <class _T1, class _D1> 2805inline _LIBCPP_INLINE_VISIBILITY 2806bool 2807operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2808{ 2809 return !__x; 2810} 2811 2812template <class _T1, class _D1> 2813inline _LIBCPP_INLINE_VISIBILITY 2814bool 2815operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2816{ 2817 return !__x; 2818} 2819 2820template <class _T1, class _D1> 2821inline _LIBCPP_INLINE_VISIBILITY 2822bool 2823operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2824{ 2825 return static_cast<bool>(__x); 2826} 2827 2828template <class _T1, class _D1> 2829inline _LIBCPP_INLINE_VISIBILITY 2830bool 2831operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2832{ 2833 return static_cast<bool>(__x); 2834} 2835 2836template <class _T1, class _D1> 2837inline _LIBCPP_INLINE_VISIBILITY 2838bool 2839operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2840{ 2841 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2842 return less<_P1>()(__x.get(), nullptr); 2843} 2844 2845template <class _T1, class _D1> 2846inline _LIBCPP_INLINE_VISIBILITY 2847bool 2848operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2849{ 2850 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2851 return less<_P1>()(nullptr, __x.get()); 2852} 2853 2854template <class _T1, class _D1> 2855inline _LIBCPP_INLINE_VISIBILITY 2856bool 2857operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2858{ 2859 return nullptr < __x; 2860} 2861 2862template <class _T1, class _D1> 2863inline _LIBCPP_INLINE_VISIBILITY 2864bool 2865operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2866{ 2867 return __x < nullptr; 2868} 2869 2870template <class _T1, class _D1> 2871inline _LIBCPP_INLINE_VISIBILITY 2872bool 2873operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2874{ 2875 return !(nullptr < __x); 2876} 2877 2878template <class _T1, class _D1> 2879inline _LIBCPP_INLINE_VISIBILITY 2880bool 2881operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2882{ 2883 return !(__x < nullptr); 2884} 2885 2886template <class _T1, class _D1> 2887inline _LIBCPP_INLINE_VISIBILITY 2888bool 2889operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2890{ 2891 return !(__x < nullptr); 2892} 2893 2894template <class _T1, class _D1> 2895inline _LIBCPP_INLINE_VISIBILITY 2896bool 2897operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2898{ 2899 return !(nullptr < __x); 2900} 2901 2902#if _LIBCPP_STD_VER > 11 2903 2904template<class _Tp> 2905struct __unique_if 2906{ 2907 typedef unique_ptr<_Tp> __unique_single; 2908}; 2909 2910template<class _Tp> 2911struct __unique_if<_Tp[]> 2912{ 2913 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 2914}; 2915 2916template<class _Tp, size_t _Np> 2917struct __unique_if<_Tp[_Np]> 2918{ 2919 typedef void __unique_array_known_bound; 2920}; 2921 2922template<class _Tp, class... _Args> 2923inline _LIBCPP_INLINE_VISIBILITY 2924typename __unique_if<_Tp>::__unique_single 2925make_unique(_Args&&... __args) 2926{ 2927 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 2928} 2929 2930template<class _Tp> 2931inline _LIBCPP_INLINE_VISIBILITY 2932typename __unique_if<_Tp>::__unique_array_unknown_bound 2933make_unique(size_t __n) 2934{ 2935 typedef typename remove_extent<_Tp>::type _Up; 2936 return unique_ptr<_Tp>(new _Up[__n]()); 2937} 2938 2939template<class _Tp, class... _Args> 2940 typename __unique_if<_Tp>::__unique_array_known_bound 2941 make_unique(_Args&&...) = delete; 2942 2943#endif // _LIBCPP_STD_VER > 11 2944 2945template <class _Tp, class _Dp> 2946#ifdef _LIBCPP_CXX03_LANG 2947struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 2948#else 2949struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 2950 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer> > 2951#endif 2952{ 2953 typedef unique_ptr<_Tp, _Dp> argument_type; 2954 typedef size_t result_type; 2955 _LIBCPP_INLINE_VISIBILITY 2956 result_type operator()(const argument_type& __ptr) const 2957 { 2958 typedef typename argument_type::pointer pointer; 2959 return hash<pointer>()(__ptr.get()); 2960 } 2961}; 2962 2963struct __destruct_n 2964{ 2965private: 2966 size_t __size_; 2967 2968 template <class _Tp> 2969 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 2970 {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();} 2971 2972 template <class _Tp> 2973 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 2974 {} 2975 2976 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 2977 {++__size_;} 2978 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 2979 {} 2980 2981 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 2982 {__size_ = __s;} 2983 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 2984 {} 2985public: 2986 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 2987 : __size_(__s) {} 2988 2989 template <class _Tp> 2990 _LIBCPP_INLINE_VISIBILITY void __incr(_Tp*) _NOEXCEPT 2991 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2992 2993 template <class _Tp> 2994 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 2995 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2996 2997 template <class _Tp> 2998 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 2999 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3000}; 3001 3002template <class _Alloc> 3003class __allocator_destructor 3004{ 3005 typedef _LIBCPP_NODEBUG_TYPE allocator_traits<_Alloc> __alloc_traits; 3006public: 3007 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::pointer pointer; 3008 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::size_type size_type; 3009private: 3010 _Alloc& __alloc_; 3011 size_type __s_; 3012public: 3013 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 3014 _NOEXCEPT 3015 : __alloc_(__a), __s_(__s) {} 3016 _LIBCPP_INLINE_VISIBILITY 3017 void operator()(pointer __p) _NOEXCEPT 3018 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 3019}; 3020 3021template <class _InputIterator, class _ForwardIterator> 3022_ForwardIterator 3023uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 3024{ 3025 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3026#ifndef _LIBCPP_NO_EXCEPTIONS 3027 _ForwardIterator __s = __r; 3028 try 3029 { 3030#endif 3031 for (; __f != __l; ++__f, (void) ++__r) 3032 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3033#ifndef _LIBCPP_NO_EXCEPTIONS 3034 } 3035 catch (...) 3036 { 3037 for (; __s != __r; ++__s) 3038 __s->~value_type(); 3039 throw; 3040 } 3041#endif 3042 return __r; 3043} 3044 3045template <class _InputIterator, class _Size, class _ForwardIterator> 3046_ForwardIterator 3047uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 3048{ 3049 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3050#ifndef _LIBCPP_NO_EXCEPTIONS 3051 _ForwardIterator __s = __r; 3052 try 3053 { 3054#endif 3055 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 3056 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3057#ifndef _LIBCPP_NO_EXCEPTIONS 3058 } 3059 catch (...) 3060 { 3061 for (; __s != __r; ++__s) 3062 __s->~value_type(); 3063 throw; 3064 } 3065#endif 3066 return __r; 3067} 3068 3069template <class _ForwardIterator, class _Tp> 3070void 3071uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 3072{ 3073 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3074#ifndef _LIBCPP_NO_EXCEPTIONS 3075 _ForwardIterator __s = __f; 3076 try 3077 { 3078#endif 3079 for (; __f != __l; ++__f) 3080 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3081#ifndef _LIBCPP_NO_EXCEPTIONS 3082 } 3083 catch (...) 3084 { 3085 for (; __s != __f; ++__s) 3086 __s->~value_type(); 3087 throw; 3088 } 3089#endif 3090} 3091 3092template <class _ForwardIterator, class _Size, class _Tp> 3093_ForwardIterator 3094uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 3095{ 3096 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3097#ifndef _LIBCPP_NO_EXCEPTIONS 3098 _ForwardIterator __s = __f; 3099 try 3100 { 3101#endif 3102 for (; __n > 0; ++__f, (void) --__n) 3103 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3104#ifndef _LIBCPP_NO_EXCEPTIONS 3105 } 3106 catch (...) 3107 { 3108 for (; __s != __f; ++__s) 3109 __s->~value_type(); 3110 throw; 3111 } 3112#endif 3113 return __f; 3114} 3115 3116#if _LIBCPP_STD_VER > 14 3117 3118template <class _Tp> 3119inline _LIBCPP_INLINE_VISIBILITY 3120void destroy_at(_Tp* __loc) { 3121 _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); 3122 __loc->~_Tp(); 3123} 3124 3125template <class _ForwardIterator> 3126inline _LIBCPP_INLINE_VISIBILITY 3127void destroy(_ForwardIterator __first, _ForwardIterator __last) { 3128 for (; __first != __last; ++__first) 3129 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3130} 3131 3132template <class _ForwardIterator, class _Size> 3133inline _LIBCPP_INLINE_VISIBILITY 3134_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 3135 for (; __n > 0; (void)++__first, --__n) 3136 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3137 return __first; 3138} 3139 3140template <class _ForwardIterator> 3141inline _LIBCPP_INLINE_VISIBILITY 3142void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 3143 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3144 auto __idx = __first; 3145#ifndef _LIBCPP_NO_EXCEPTIONS 3146 try { 3147#endif 3148 for (; __idx != __last; ++__idx) 3149 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3150#ifndef _LIBCPP_NO_EXCEPTIONS 3151 } catch (...) { 3152 _VSTD::destroy(__first, __idx); 3153 throw; 3154 } 3155#endif 3156} 3157 3158template <class _ForwardIterator, class _Size> 3159inline _LIBCPP_INLINE_VISIBILITY 3160_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 3161 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3162 auto __idx = __first; 3163#ifndef _LIBCPP_NO_EXCEPTIONS 3164 try { 3165#endif 3166 for (; __n > 0; (void)++__idx, --__n) 3167 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3168 return __idx; 3169#ifndef _LIBCPP_NO_EXCEPTIONS 3170 } catch (...) { 3171 _VSTD::destroy(__first, __idx); 3172 throw; 3173 } 3174#endif 3175} 3176 3177 3178template <class _ForwardIterator> 3179inline _LIBCPP_INLINE_VISIBILITY 3180void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 3181 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3182 auto __idx = __first; 3183#ifndef _LIBCPP_NO_EXCEPTIONS 3184 try { 3185#endif 3186 for (; __idx != __last; ++__idx) 3187 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3188#ifndef _LIBCPP_NO_EXCEPTIONS 3189 } catch (...) { 3190 _VSTD::destroy(__first, __idx); 3191 throw; 3192 } 3193#endif 3194} 3195 3196template <class _ForwardIterator, class _Size> 3197inline _LIBCPP_INLINE_VISIBILITY 3198_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 3199 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3200 auto __idx = __first; 3201#ifndef _LIBCPP_NO_EXCEPTIONS 3202 try { 3203#endif 3204 for (; __n > 0; (void)++__idx, --__n) 3205 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3206 return __idx; 3207#ifndef _LIBCPP_NO_EXCEPTIONS 3208 } catch (...) { 3209 _VSTD::destroy(__first, __idx); 3210 throw; 3211 } 3212#endif 3213} 3214 3215 3216template <class _InputIt, class _ForwardIt> 3217inline _LIBCPP_INLINE_VISIBILITY 3218_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 3219 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3220 auto __idx = __first_res; 3221#ifndef _LIBCPP_NO_EXCEPTIONS 3222 try { 3223#endif 3224 for (; __first != __last; (void)++__idx, ++__first) 3225 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3226 return __idx; 3227#ifndef _LIBCPP_NO_EXCEPTIONS 3228 } catch (...) { 3229 _VSTD::destroy(__first_res, __idx); 3230 throw; 3231 } 3232#endif 3233} 3234 3235template <class _InputIt, class _Size, class _ForwardIt> 3236inline _LIBCPP_INLINE_VISIBILITY 3237pair<_InputIt, _ForwardIt> 3238uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 3239 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3240 auto __idx = __first_res; 3241#ifndef _LIBCPP_NO_EXCEPTIONS 3242 try { 3243#endif 3244 for (; __n > 0; ++__idx, (void)++__first, --__n) 3245 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3246 return {__first, __idx}; 3247#ifndef _LIBCPP_NO_EXCEPTIONS 3248 } catch (...) { 3249 _VSTD::destroy(__first_res, __idx); 3250 throw; 3251 } 3252#endif 3253} 3254 3255 3256#endif // _LIBCPP_STD_VER > 14 3257 3258// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 3259// should be sufficient for thread safety. 3260// See https://bugs.llvm.org/show_bug.cgi?id=22803 3261#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 3262 && defined(__ATOMIC_RELAXED) \ 3263 && defined(__ATOMIC_ACQ_REL) 3264# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3265#elif defined(_LIBCPP_COMPILER_GCC) 3266# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3267#endif 3268 3269template <class _Tp> 3270inline _LIBCPP_INLINE_VISIBILITY _Tp 3271__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 3272{ 3273#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3274 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 3275#else 3276 return __t += 1; 3277#endif 3278} 3279 3280template <class _Tp> 3281inline _LIBCPP_INLINE_VISIBILITY _Tp 3282__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 3283{ 3284#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3285 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 3286#else 3287 return __t -= 1; 3288#endif 3289} 3290 3291class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 3292 : public std::exception 3293{ 3294public: 3295 bad_weak_ptr() _NOEXCEPT = default; 3296 bad_weak_ptr(const bad_weak_ptr&) _NOEXCEPT = default; 3297 virtual ~bad_weak_ptr() _NOEXCEPT; 3298 virtual const char* what() const _NOEXCEPT; 3299}; 3300 3301_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY 3302void __throw_bad_weak_ptr() 3303{ 3304#ifndef _LIBCPP_NO_EXCEPTIONS 3305 throw bad_weak_ptr(); 3306#else 3307 _VSTD::abort(); 3308#endif 3309} 3310 3311template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 3312 3313class _LIBCPP_TYPE_VIS __shared_count 3314{ 3315 __shared_count(const __shared_count&); 3316 __shared_count& operator=(const __shared_count&); 3317 3318protected: 3319 long __shared_owners_; 3320 virtual ~__shared_count(); 3321private: 3322 virtual void __on_zero_shared() _NOEXCEPT = 0; 3323 3324public: 3325 _LIBCPP_INLINE_VISIBILITY 3326 explicit __shared_count(long __refs = 0) _NOEXCEPT 3327 : __shared_owners_(__refs) {} 3328 3329#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3330 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3331 void __add_shared() _NOEXCEPT; 3332 bool __release_shared() _NOEXCEPT; 3333#else 3334 _LIBCPP_INLINE_VISIBILITY 3335 void __add_shared() _NOEXCEPT { 3336 __libcpp_atomic_refcount_increment(__shared_owners_); 3337 } 3338 _LIBCPP_INLINE_VISIBILITY 3339 bool __release_shared() _NOEXCEPT { 3340 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 3341 __on_zero_shared(); 3342 return true; 3343 } 3344 return false; 3345 } 3346#endif 3347 _LIBCPP_INLINE_VISIBILITY 3348 long use_count() const _NOEXCEPT { 3349 return __libcpp_relaxed_load(&__shared_owners_) + 1; 3350 } 3351}; 3352 3353class _LIBCPP_TYPE_VIS __shared_weak_count 3354 : private __shared_count 3355{ 3356 long __shared_weak_owners_; 3357 3358public: 3359 _LIBCPP_INLINE_VISIBILITY 3360 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 3361 : __shared_count(__refs), 3362 __shared_weak_owners_(__refs) {} 3363protected: 3364 virtual ~__shared_weak_count(); 3365 3366public: 3367#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3368 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3369 void __add_shared() _NOEXCEPT; 3370 void __add_weak() _NOEXCEPT; 3371 void __release_shared() _NOEXCEPT; 3372#else 3373 _LIBCPP_INLINE_VISIBILITY 3374 void __add_shared() _NOEXCEPT { 3375 __shared_count::__add_shared(); 3376 } 3377 _LIBCPP_INLINE_VISIBILITY 3378 void __add_weak() _NOEXCEPT { 3379 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 3380 } 3381 _LIBCPP_INLINE_VISIBILITY 3382 void __release_shared() _NOEXCEPT { 3383 if (__shared_count::__release_shared()) 3384 __release_weak(); 3385 } 3386#endif 3387 void __release_weak() _NOEXCEPT; 3388 _LIBCPP_INLINE_VISIBILITY 3389 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 3390 __shared_weak_count* lock() _NOEXCEPT; 3391 3392 // Define the function out only if we build static libc++ without RTTI. 3393 // Otherwise we may break clients who need to compile their projects with 3394 // -fno-rtti and yet link against a libc++.dylib compiled 3395 // without -fno-rtti. 3396#if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC) 3397 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3398#endif 3399private: 3400 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 3401}; 3402 3403template <class _Tp, class _Dp, class _Alloc> 3404class __shared_ptr_pointer 3405 : public __shared_weak_count 3406{ 3407 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 3408public: 3409 _LIBCPP_INLINE_VISIBILITY 3410 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 3411 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 3412 3413#ifndef _LIBCPP_NO_RTTI 3414 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3415#endif 3416 3417private: 3418 virtual void __on_zero_shared() _NOEXCEPT; 3419 virtual void __on_zero_shared_weak() _NOEXCEPT; 3420}; 3421 3422#ifndef _LIBCPP_NO_RTTI 3423 3424template <class _Tp, class _Dp, class _Alloc> 3425const void* 3426__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 3427{ 3428 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 3429} 3430 3431#endif // _LIBCPP_NO_RTTI 3432 3433template <class _Tp, class _Dp, class _Alloc> 3434void 3435__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 3436{ 3437 __data_.first().second()(__data_.first().first()); 3438 __data_.first().second().~_Dp(); 3439} 3440 3441template <class _Tp, class _Dp, class _Alloc> 3442void 3443__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3444{ 3445 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 3446 typedef allocator_traits<_Al> _ATraits; 3447 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3448 3449 _Al __a(__data_.second()); 3450 __data_.second().~_Alloc(); 3451 __a.deallocate(_PTraits::pointer_to(*this), 1); 3452} 3453 3454template <class _Tp, class _Alloc> 3455class __shared_ptr_emplace 3456 : public __shared_weak_count 3457{ 3458 __compressed_pair<_Alloc, _Tp> __data_; 3459public: 3460 3461 _LIBCPP_INLINE_VISIBILITY 3462 __shared_ptr_emplace(_Alloc __a) 3463 : __data_(_VSTD::move(__a), __value_init_tag()) {} 3464 3465 3466#ifndef _LIBCPP_HAS_NO_VARIADICS 3467 template <class ..._Args> 3468 _LIBCPP_INLINE_VISIBILITY 3469 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 3470 : __data_(piecewise_construct, _VSTD::forward_as_tuple(__a), 3471 _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {} 3472#else // _LIBCPP_HAS_NO_VARIADICS 3473 3474 template <class _A0> 3475 _LIBCPP_INLINE_VISIBILITY 3476 __shared_ptr_emplace(_Alloc __a, _A0& __a0) 3477 : __data_(__a, _Tp(__a0)) {} 3478 3479 template <class _A0, class _A1> 3480 _LIBCPP_INLINE_VISIBILITY 3481 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1) 3482 : __data_(__a, _Tp(__a0, __a1)) {} 3483 3484 template <class _A0, class _A1, class _A2> 3485 _LIBCPP_INLINE_VISIBILITY 3486 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1, _A2& __a2) 3487 : __data_(__a, _Tp(__a0, __a1, __a2)) {} 3488 3489#endif // _LIBCPP_HAS_NO_VARIADICS 3490 3491private: 3492 virtual void __on_zero_shared() _NOEXCEPT; 3493 virtual void __on_zero_shared_weak() _NOEXCEPT; 3494public: 3495 _LIBCPP_INLINE_VISIBILITY 3496 _Tp* get() _NOEXCEPT {return _VSTD::addressof(__data_.second());} 3497}; 3498 3499template <class _Tp, class _Alloc> 3500void 3501__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared() _NOEXCEPT 3502{ 3503 __data_.second().~_Tp(); 3504} 3505 3506template <class _Tp, class _Alloc> 3507void 3508__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3509{ 3510 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type _Al; 3511 typedef allocator_traits<_Al> _ATraits; 3512 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3513 _Al __a(__data_.first()); 3514 __data_.first().~_Alloc(); 3515 __a.deallocate(_PTraits::pointer_to(*this), 1); 3516} 3517 3518struct __shared_ptr_dummy_rebind_allocator_type; 3519template <> 3520class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type> 3521{ 3522public: 3523 template <class _Other> 3524 struct rebind 3525 { 3526 typedef allocator<_Other> other; 3527 }; 3528}; 3529 3530template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 3531 3532template<class _Tp, class _Up> 3533struct __compatible_with 3534#if _LIBCPP_STD_VER > 14 3535 : is_convertible<remove_extent_t<_Tp>*, remove_extent_t<_Up>*> {}; 3536#else 3537 : is_convertible<_Tp*, _Up*> {}; 3538#endif // _LIBCPP_STD_VER > 14 3539 3540template<class _Tp> 3541class _LIBCPP_TEMPLATE_VIS shared_ptr 3542{ 3543public: 3544#if _LIBCPP_STD_VER > 14 3545 typedef weak_ptr<_Tp> weak_type; 3546 typedef remove_extent_t<_Tp> element_type; 3547#else 3548 typedef _Tp element_type; 3549#endif 3550 3551private: 3552 element_type* __ptr_; 3553 __shared_weak_count* __cntrl_; 3554 3555 struct __nat {int __for_bool_;}; 3556public: 3557 _LIBCPP_INLINE_VISIBILITY 3558 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 3559 _LIBCPP_INLINE_VISIBILITY 3560 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 3561 template<class _Yp> 3562 explicit shared_ptr(_Yp* __p, 3563 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3564 template<class _Yp, class _Dp> 3565 shared_ptr(_Yp* __p, _Dp __d, 3566 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3567 template<class _Yp, class _Dp, class _Alloc> 3568 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3569 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3570 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 3571 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 3572 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 3573 _LIBCPP_INLINE_VISIBILITY 3574 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 3575 template<class _Yp> 3576 _LIBCPP_INLINE_VISIBILITY 3577 shared_ptr(const shared_ptr<_Yp>& __r, 3578 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 3579 _NOEXCEPT; 3580#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3581 _LIBCPP_INLINE_VISIBILITY 3582 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 3583 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 3584 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 3585 _NOEXCEPT; 3586#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3587 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 3588 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 3589#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3590#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3591 template<class _Yp> 3592 shared_ptr(auto_ptr<_Yp>&& __r, 3593 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3594#else 3595 template<class _Yp> 3596 shared_ptr(auto_ptr<_Yp> __r, 3597 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3598#endif 3599#endif 3600#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3601 template <class _Yp, class _Dp> 3602 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3603 typename enable_if 3604 < 3605 !is_lvalue_reference<_Dp>::value && 3606 !is_array<_Yp>::value && 3607 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3608 __nat 3609 >::type = __nat()); 3610 template <class _Yp, class _Dp> 3611 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3612 typename enable_if 3613 < 3614 is_lvalue_reference<_Dp>::value && 3615 !is_array<_Yp>::value && 3616 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3617 __nat 3618 >::type = __nat()); 3619#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3620 template <class _Yp, class _Dp> 3621 shared_ptr(unique_ptr<_Yp, _Dp>, 3622 typename enable_if 3623 < 3624 !is_lvalue_reference<_Dp>::value && 3625 !is_array<_Yp>::value && 3626 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3627 __nat 3628 >::type = __nat()); 3629 template <class _Yp, class _Dp> 3630 shared_ptr(unique_ptr<_Yp, _Dp>, 3631 typename enable_if 3632 < 3633 is_lvalue_reference<_Dp>::value && 3634 !is_array<_Yp>::value && 3635 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3636 __nat 3637 >::type = __nat()); 3638#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3639 3640 ~shared_ptr(); 3641 3642 _LIBCPP_INLINE_VISIBILITY 3643 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 3644 template<class _Yp> 3645 typename enable_if 3646 < 3647 __compatible_with<_Yp, element_type>::value, 3648 shared_ptr& 3649 >::type 3650 _LIBCPP_INLINE_VISIBILITY 3651 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 3652#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3653 _LIBCPP_INLINE_VISIBILITY 3654 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 3655 template<class _Yp> 3656 typename enable_if 3657 < 3658 __compatible_with<_Yp, element_type>::value, 3659 shared_ptr& 3660 >::type 3661 _LIBCPP_INLINE_VISIBILITY 3662 operator=(shared_ptr<_Yp>&& __r); 3663#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3664 template<class _Yp> 3665 _LIBCPP_INLINE_VISIBILITY 3666 typename enable_if 3667 < 3668 !is_array<_Yp>::value && 3669 is_convertible<_Yp*, element_type*>::value, 3670 shared_ptr 3671 >::type& 3672 operator=(auto_ptr<_Yp>&& __r); 3673#endif 3674#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3675#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3676 template<class _Yp> 3677 _LIBCPP_INLINE_VISIBILITY 3678 typename enable_if 3679 < 3680 !is_array<_Yp>::value && 3681 is_convertible<_Yp*, element_type*>::value, 3682 shared_ptr& 3683 >::type 3684 operator=(auto_ptr<_Yp> __r); 3685#endif 3686#endif 3687 template <class _Yp, class _Dp> 3688 typename enable_if 3689 < 3690 !is_array<_Yp>::value && 3691 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3692 shared_ptr& 3693 >::type 3694#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3695 _LIBCPP_INLINE_VISIBILITY 3696 operator=(unique_ptr<_Yp, _Dp>&& __r); 3697#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3698 _LIBCPP_INLINE_VISIBILITY 3699 operator=(unique_ptr<_Yp, _Dp> __r); 3700#endif 3701 3702 _LIBCPP_INLINE_VISIBILITY 3703 void swap(shared_ptr& __r) _NOEXCEPT; 3704 _LIBCPP_INLINE_VISIBILITY 3705 void reset() _NOEXCEPT; 3706 template<class _Yp> 3707 typename enable_if 3708 < 3709 __compatible_with<_Yp, element_type>::value, 3710 void 3711 >::type 3712 _LIBCPP_INLINE_VISIBILITY 3713 reset(_Yp* __p); 3714 template<class _Yp, class _Dp> 3715 typename enable_if 3716 < 3717 __compatible_with<_Yp, element_type>::value, 3718 void 3719 >::type 3720 _LIBCPP_INLINE_VISIBILITY 3721 reset(_Yp* __p, _Dp __d); 3722 template<class _Yp, class _Dp, class _Alloc> 3723 typename enable_if 3724 < 3725 __compatible_with<_Yp, element_type>::value, 3726 void 3727 >::type 3728 _LIBCPP_INLINE_VISIBILITY 3729 reset(_Yp* __p, _Dp __d, _Alloc __a); 3730 3731 _LIBCPP_INLINE_VISIBILITY 3732 element_type* get() const _NOEXCEPT {return __ptr_;} 3733 _LIBCPP_INLINE_VISIBILITY 3734 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 3735 {return *__ptr_;} 3736 _LIBCPP_INLINE_VISIBILITY 3737 element_type* operator->() const _NOEXCEPT 3738 { 3739 static_assert(!_VSTD::is_array<_Tp>::value, 3740 "std::shared_ptr<T>::operator-> is only valid when T is not an array type."); 3741 return __ptr_; 3742 } 3743 _LIBCPP_INLINE_VISIBILITY 3744 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 3745 _LIBCPP_INLINE_VISIBILITY 3746 bool unique() const _NOEXCEPT {return use_count() == 1;} 3747 _LIBCPP_INLINE_VISIBILITY 3748 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != 0;} 3749 template <class _Up> 3750 _LIBCPP_INLINE_VISIBILITY 3751 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 3752 {return __cntrl_ < __p.__cntrl_;} 3753 template <class _Up> 3754 _LIBCPP_INLINE_VISIBILITY 3755 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 3756 {return __cntrl_ < __p.__cntrl_;} 3757 _LIBCPP_INLINE_VISIBILITY 3758 bool 3759 __owner_equivalent(const shared_ptr& __p) const 3760 {return __cntrl_ == __p.__cntrl_;} 3761 3762#if _LIBCPP_STD_VER > 14 3763 typename add_lvalue_reference<element_type>::type 3764 _LIBCPP_INLINE_VISIBILITY 3765 operator[](ptrdiff_t __i) const 3766 { 3767 static_assert(_VSTD::is_array<_Tp>::value, 3768 "std::shared_ptr<T>::operator[] is only valid when T is an array type."); 3769 return __ptr_[__i]; 3770 } 3771#endif 3772 3773#ifndef _LIBCPP_NO_RTTI 3774 template <class _Dp> 3775 _LIBCPP_INLINE_VISIBILITY 3776 _Dp* __get_deleter() const _NOEXCEPT 3777 {return static_cast<_Dp*>(__cntrl_ 3778 ? const_cast<void *>(__cntrl_->__get_deleter(typeid(_Dp))) 3779 : nullptr);} 3780#endif // _LIBCPP_NO_RTTI 3781 3782 template<class _Yp, class _CntrlBlk> 3783 static shared_ptr<_Tp> 3784 __create_with_control_block(_Yp* __p, _CntrlBlk* __cntrl) _NOEXCEPT 3785 { 3786 shared_ptr<_Tp> __r; 3787 __r.__ptr_ = __p; 3788 __r.__cntrl_ = __cntrl; 3789 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 3790 return __r; 3791 } 3792 3793private: 3794 template <class _Yp, bool = is_function<_Yp>::value> 3795 struct __shared_ptr_default_allocator 3796 { 3797 typedef allocator<_Yp> type; 3798 }; 3799 3800 template <class _Yp> 3801 struct __shared_ptr_default_allocator<_Yp, true> 3802 { 3803 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type; 3804 }; 3805 3806 template <class _Yp, class _OrigPtr> 3807 _LIBCPP_INLINE_VISIBILITY 3808 typename enable_if<is_convertible<_OrigPtr*, 3809 const enable_shared_from_this<_Yp>* 3810 >::value, 3811 void>::type 3812 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 3813 _OrigPtr* __ptr) _NOEXCEPT 3814 { 3815 typedef typename remove_cv<_Yp>::type _RawYp; 3816 if (__e && __e->__weak_this_.expired()) 3817 { 3818 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 3819 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 3820 } 3821 } 3822 3823 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {} 3824 3825 template <class, class _Yp> 3826 struct __shared_ptr_default_delete 3827 : default_delete<_Yp> {}; 3828 3829 template <class _Yp, class _Un, size_t _Sz> 3830 struct __shared_ptr_default_delete<_Yp[_Sz], _Un> 3831 : default_delete<_Yp[]> {}; 3832 3833 template <class _Yp, class _Un> 3834 struct __shared_ptr_default_delete<_Yp[], _Un> 3835 : default_delete<_Yp[]> {}; 3836 3837 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 3838 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 3839}; 3840 3841#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 3842template<class _Tp> 3843shared_ptr(weak_ptr<_Tp>) -> shared_ptr<_Tp>; 3844template<class _Tp, class _Dp> 3845shared_ptr(unique_ptr<_Tp, _Dp>) -> shared_ptr<_Tp>; 3846#endif 3847 3848template<class _Tp> 3849inline 3850_LIBCPP_CONSTEXPR 3851shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 3852 : __ptr_(0), 3853 __cntrl_(0) 3854{ 3855} 3856 3857template<class _Tp> 3858inline 3859_LIBCPP_CONSTEXPR 3860shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 3861 : __ptr_(0), 3862 __cntrl_(0) 3863{ 3864} 3865 3866template<class _Tp> 3867template<class _Yp> 3868shared_ptr<_Tp>::shared_ptr(_Yp* __p, 3869 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3870 : __ptr_(__p) 3871{ 3872 unique_ptr<_Yp> __hold(__p); 3873 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3874 typedef __shared_ptr_pointer<_Yp*, __shared_ptr_default_delete<_Tp, _Yp>, _AllocT > _CntrlBlk; 3875 __cntrl_ = new _CntrlBlk(__p, __shared_ptr_default_delete<_Tp, _Yp>(), _AllocT()); 3876 __hold.release(); 3877 __enable_weak_this(__p, __p); 3878} 3879 3880template<class _Tp> 3881template<class _Yp, class _Dp> 3882shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 3883 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3884 : __ptr_(__p) 3885{ 3886#ifndef _LIBCPP_NO_EXCEPTIONS 3887 try 3888 { 3889#endif // _LIBCPP_NO_EXCEPTIONS 3890 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3891 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 3892 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3893 __enable_weak_this(__p, __p); 3894#ifndef _LIBCPP_NO_EXCEPTIONS 3895 } 3896 catch (...) 3897 { 3898 __d(__p); 3899 throw; 3900 } 3901#endif // _LIBCPP_NO_EXCEPTIONS 3902} 3903 3904template<class _Tp> 3905template<class _Dp> 3906shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 3907 : __ptr_(0) 3908{ 3909#ifndef _LIBCPP_NO_EXCEPTIONS 3910 try 3911 { 3912#endif // _LIBCPP_NO_EXCEPTIONS 3913 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT; 3914 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk; 3915 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3916#ifndef _LIBCPP_NO_EXCEPTIONS 3917 } 3918 catch (...) 3919 { 3920 __d(__p); 3921 throw; 3922 } 3923#endif // _LIBCPP_NO_EXCEPTIONS 3924} 3925 3926template<class _Tp> 3927template<class _Yp, class _Dp, class _Alloc> 3928shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3929 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3930 : __ptr_(__p) 3931{ 3932#ifndef _LIBCPP_NO_EXCEPTIONS 3933 try 3934 { 3935#endif // _LIBCPP_NO_EXCEPTIONS 3936 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 3937 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3938 typedef __allocator_destructor<_A2> _D2; 3939 _A2 __a2(__a); 3940 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 3941 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 3942 _CntrlBlk(__p, __d, __a); 3943 __cntrl_ = _VSTD::addressof(*__hold2.release()); 3944 __enable_weak_this(__p, __p); 3945#ifndef _LIBCPP_NO_EXCEPTIONS 3946 } 3947 catch (...) 3948 { 3949 __d(__p); 3950 throw; 3951 } 3952#endif // _LIBCPP_NO_EXCEPTIONS 3953} 3954 3955template<class _Tp> 3956template<class _Dp, class _Alloc> 3957shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 3958 : __ptr_(0) 3959{ 3960#ifndef _LIBCPP_NO_EXCEPTIONS 3961 try 3962 { 3963#endif // _LIBCPP_NO_EXCEPTIONS 3964 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 3965 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3966 typedef __allocator_destructor<_A2> _D2; 3967 _A2 __a2(__a); 3968 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 3969 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 3970 _CntrlBlk(__p, __d, __a); 3971 __cntrl_ = _VSTD::addressof(*__hold2.release()); 3972#ifndef _LIBCPP_NO_EXCEPTIONS 3973 } 3974 catch (...) 3975 { 3976 __d(__p); 3977 throw; 3978 } 3979#endif // _LIBCPP_NO_EXCEPTIONS 3980} 3981 3982template<class _Tp> 3983template<class _Yp> 3984inline 3985shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 3986 : __ptr_(__p), 3987 __cntrl_(__r.__cntrl_) 3988{ 3989 if (__cntrl_) 3990 __cntrl_->__add_shared(); 3991} 3992 3993template<class _Tp> 3994inline 3995shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 3996 : __ptr_(__r.__ptr_), 3997 __cntrl_(__r.__cntrl_) 3998{ 3999 if (__cntrl_) 4000 __cntrl_->__add_shared(); 4001} 4002 4003template<class _Tp> 4004template<class _Yp> 4005inline 4006shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 4007 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 4008 _NOEXCEPT 4009 : __ptr_(__r.__ptr_), 4010 __cntrl_(__r.__cntrl_) 4011{ 4012 if (__cntrl_) 4013 __cntrl_->__add_shared(); 4014} 4015 4016#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4017 4018template<class _Tp> 4019inline 4020shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 4021 : __ptr_(__r.__ptr_), 4022 __cntrl_(__r.__cntrl_) 4023{ 4024 __r.__ptr_ = 0; 4025 __r.__cntrl_ = 0; 4026} 4027 4028template<class _Tp> 4029template<class _Yp> 4030inline 4031shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 4032 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 4033 _NOEXCEPT 4034 : __ptr_(__r.__ptr_), 4035 __cntrl_(__r.__cntrl_) 4036{ 4037 __r.__ptr_ = 0; 4038 __r.__cntrl_ = 0; 4039} 4040 4041#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4042 4043#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4044template<class _Tp> 4045template<class _Yp> 4046#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4047shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 4048#else 4049shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp> __r, 4050#endif 4051 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4052 : __ptr_(__r.get()) 4053{ 4054 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 4055 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 4056 __enable_weak_this(__r.get(), __r.get()); 4057 __r.release(); 4058} 4059#endif 4060 4061template<class _Tp> 4062template <class _Yp, class _Dp> 4063#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4064shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4065#else 4066shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4067#endif 4068 typename enable_if 4069 < 4070 !is_lvalue_reference<_Dp>::value && 4071 !is_array<_Yp>::value && 4072 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4073 __nat 4074 >::type) 4075 : __ptr_(__r.get()) 4076{ 4077#if _LIBCPP_STD_VER > 11 4078 if (__ptr_ == nullptr) 4079 __cntrl_ = nullptr; 4080 else 4081#endif 4082 { 4083 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4084 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 4085 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT()); 4086 __enable_weak_this(__r.get(), __r.get()); 4087 } 4088 __r.release(); 4089} 4090 4091template<class _Tp> 4092template <class _Yp, class _Dp> 4093#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4094shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4095#else 4096shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4097#endif 4098 typename enable_if 4099 < 4100 is_lvalue_reference<_Dp>::value && 4101 !is_array<_Yp>::value && 4102 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4103 __nat 4104 >::type) 4105 : __ptr_(__r.get()) 4106{ 4107#if _LIBCPP_STD_VER > 11 4108 if (__ptr_ == nullptr) 4109 __cntrl_ = nullptr; 4110 else 4111#endif 4112 { 4113 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4114 typedef __shared_ptr_pointer<_Yp*, 4115 reference_wrapper<typename remove_reference<_Dp>::type>, 4116 _AllocT > _CntrlBlk; 4117 __cntrl_ = new _CntrlBlk(__r.get(), _VSTD::ref(__r.get_deleter()), _AllocT()); 4118 __enable_weak_this(__r.get(), __r.get()); 4119 } 4120 __r.release(); 4121} 4122 4123template<class _Tp> 4124shared_ptr<_Tp>::~shared_ptr() 4125{ 4126 if (__cntrl_) 4127 __cntrl_->__release_shared(); 4128} 4129 4130template<class _Tp> 4131inline 4132shared_ptr<_Tp>& 4133shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 4134{ 4135 shared_ptr(__r).swap(*this); 4136 return *this; 4137} 4138 4139template<class _Tp> 4140template<class _Yp> 4141inline 4142typename enable_if 4143< 4144 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4145 shared_ptr<_Tp>& 4146>::type 4147shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 4148{ 4149 shared_ptr(__r).swap(*this); 4150 return *this; 4151} 4152 4153#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4154 4155template<class _Tp> 4156inline 4157shared_ptr<_Tp>& 4158shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 4159{ 4160 shared_ptr(_VSTD::move(__r)).swap(*this); 4161 return *this; 4162} 4163 4164template<class _Tp> 4165template<class _Yp> 4166inline 4167typename enable_if 4168< 4169 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4170 shared_ptr<_Tp>& 4171>::type 4172shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 4173{ 4174 shared_ptr(_VSTD::move(__r)).swap(*this); 4175 return *this; 4176} 4177 4178#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4179template<class _Tp> 4180template<class _Yp> 4181inline 4182typename enable_if 4183< 4184 !is_array<_Yp>::value && 4185 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4186 shared_ptr<_Tp> 4187>::type& 4188shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 4189{ 4190 shared_ptr(_VSTD::move(__r)).swap(*this); 4191 return *this; 4192} 4193#endif 4194 4195template<class _Tp> 4196template <class _Yp, class _Dp> 4197inline 4198typename enable_if 4199< 4200 !is_array<_Yp>::value && 4201 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4202 typename shared_ptr<_Tp>::element_type*>::value, 4203 shared_ptr<_Tp>& 4204>::type 4205shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 4206{ 4207 shared_ptr(_VSTD::move(__r)).swap(*this); 4208 return *this; 4209} 4210 4211#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4212 4213#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4214template<class _Tp> 4215template<class _Yp> 4216inline _LIBCPP_INLINE_VISIBILITY 4217typename enable_if 4218< 4219 !is_array<_Yp>::value && 4220 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4221 shared_ptr<_Tp>& 4222>::type 4223shared_ptr<_Tp>::operator=(auto_ptr<_Yp> __r) 4224{ 4225 shared_ptr(__r).swap(*this); 4226 return *this; 4227} 4228#endif 4229 4230template<class _Tp> 4231template <class _Yp, class _Dp> 4232inline _LIBCPP_INLINE_VISIBILITY 4233typename enable_if 4234< 4235 !is_array<_Yp>::value && 4236 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4237 typename shared_ptr<_Tp>::element_type*>::value, 4238 shared_ptr<_Tp>& 4239>::type 4240shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp> __r) 4241{ 4242 shared_ptr(_VSTD::move(__r)).swap(*this); 4243 return *this; 4244} 4245 4246#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4247 4248template<class _Tp> 4249inline 4250void 4251shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 4252{ 4253 _VSTD::swap(__ptr_, __r.__ptr_); 4254 _VSTD::swap(__cntrl_, __r.__cntrl_); 4255} 4256 4257template<class _Tp> 4258inline 4259void 4260shared_ptr<_Tp>::reset() _NOEXCEPT 4261{ 4262 shared_ptr().swap(*this); 4263} 4264 4265template<class _Tp> 4266template<class _Yp> 4267inline 4268typename enable_if 4269< 4270 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4271 void 4272>::type 4273shared_ptr<_Tp>::reset(_Yp* __p) 4274{ 4275 shared_ptr(__p).swap(*this); 4276} 4277 4278template<class _Tp> 4279template<class _Yp, class _Dp> 4280inline 4281typename enable_if 4282< 4283 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4284 void 4285>::type 4286shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 4287{ 4288 shared_ptr(__p, __d).swap(*this); 4289} 4290 4291template<class _Tp> 4292template<class _Yp, class _Dp, class _Alloc> 4293inline 4294typename enable_if 4295< 4296 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4297 void 4298>::type 4299shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 4300{ 4301 shared_ptr(__p, __d, __a).swap(*this); 4302} 4303 4304template<class _Tp, class ..._Args> 4305inline _LIBCPP_INLINE_VISIBILITY 4306typename enable_if 4307< 4308 !is_array<_Tp>::value, 4309 shared_ptr<_Tp> 4310>::type 4311make_shared(_Args&& ...__args) 4312{ 4313 static_assert(is_constructible<_Tp, _Args...>::value, "Can't construct object in make_shared"); 4314 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4315 typedef allocator<_CntrlBlk> _A2; 4316 typedef __allocator_destructor<_A2> _D2; 4317 4318 _A2 __a2; 4319 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4320 ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...); 4321 4322 _Tp *__ptr = __hold2.get()->get(); 4323 return shared_ptr<_Tp>::__create_with_control_block(__ptr, __hold2.release()); 4324} 4325 4326template<class _Tp, class _Alloc, class ..._Args> 4327inline _LIBCPP_INLINE_VISIBILITY 4328typename enable_if 4329< 4330 !is_array<_Tp>::value, 4331 shared_ptr<_Tp> 4332>::type 4333allocate_shared(const _Alloc& __a, _Args&& ...__args) 4334{ 4335 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in allocate_shared"); 4336 4337 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4338 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4339 typedef __allocator_destructor<_A2> _D2; 4340 4341 _A2 __a2(__a); 4342 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4343 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4344 _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...); 4345 4346 typename shared_ptr<_Tp>::element_type *__p = __hold2.get()->get(); 4347 return shared_ptr<_Tp>::__create_with_control_block(__p, _VSTD::addressof(*__hold2.release())); 4348} 4349 4350template<class _Tp, class _Up> 4351inline _LIBCPP_INLINE_VISIBILITY 4352bool 4353operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4354{ 4355 return __x.get() == __y.get(); 4356} 4357 4358template<class _Tp, class _Up> 4359inline _LIBCPP_INLINE_VISIBILITY 4360bool 4361operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4362{ 4363 return !(__x == __y); 4364} 4365 4366template<class _Tp, class _Up> 4367inline _LIBCPP_INLINE_VISIBILITY 4368bool 4369operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4370{ 4371#if _LIBCPP_STD_VER <= 11 4372 typedef typename common_type<_Tp*, _Up*>::type _Vp; 4373 return less<_Vp>()(__x.get(), __y.get()); 4374#else 4375 return less<>()(__x.get(), __y.get()); 4376#endif 4377 4378} 4379 4380template<class _Tp, class _Up> 4381inline _LIBCPP_INLINE_VISIBILITY 4382bool 4383operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4384{ 4385 return __y < __x; 4386} 4387 4388template<class _Tp, class _Up> 4389inline _LIBCPP_INLINE_VISIBILITY 4390bool 4391operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4392{ 4393 return !(__y < __x); 4394} 4395 4396template<class _Tp, class _Up> 4397inline _LIBCPP_INLINE_VISIBILITY 4398bool 4399operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4400{ 4401 return !(__x < __y); 4402} 4403 4404template<class _Tp> 4405inline _LIBCPP_INLINE_VISIBILITY 4406bool 4407operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4408{ 4409 return !__x; 4410} 4411 4412template<class _Tp> 4413inline _LIBCPP_INLINE_VISIBILITY 4414bool 4415operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4416{ 4417 return !__x; 4418} 4419 4420template<class _Tp> 4421inline _LIBCPP_INLINE_VISIBILITY 4422bool 4423operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4424{ 4425 return static_cast<bool>(__x); 4426} 4427 4428template<class _Tp> 4429inline _LIBCPP_INLINE_VISIBILITY 4430bool 4431operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4432{ 4433 return static_cast<bool>(__x); 4434} 4435 4436template<class _Tp> 4437inline _LIBCPP_INLINE_VISIBILITY 4438bool 4439operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4440{ 4441 return less<_Tp*>()(__x.get(), nullptr); 4442} 4443 4444template<class _Tp> 4445inline _LIBCPP_INLINE_VISIBILITY 4446bool 4447operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4448{ 4449 return less<_Tp*>()(nullptr, __x.get()); 4450} 4451 4452template<class _Tp> 4453inline _LIBCPP_INLINE_VISIBILITY 4454bool 4455operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4456{ 4457 return nullptr < __x; 4458} 4459 4460template<class _Tp> 4461inline _LIBCPP_INLINE_VISIBILITY 4462bool 4463operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4464{ 4465 return __x < nullptr; 4466} 4467 4468template<class _Tp> 4469inline _LIBCPP_INLINE_VISIBILITY 4470bool 4471operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4472{ 4473 return !(nullptr < __x); 4474} 4475 4476template<class _Tp> 4477inline _LIBCPP_INLINE_VISIBILITY 4478bool 4479operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4480{ 4481 return !(__x < nullptr); 4482} 4483 4484template<class _Tp> 4485inline _LIBCPP_INLINE_VISIBILITY 4486bool 4487operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4488{ 4489 return !(__x < nullptr); 4490} 4491 4492template<class _Tp> 4493inline _LIBCPP_INLINE_VISIBILITY 4494bool 4495operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4496{ 4497 return !(nullptr < __x); 4498} 4499 4500template<class _Tp> 4501inline _LIBCPP_INLINE_VISIBILITY 4502void 4503swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 4504{ 4505 __x.swap(__y); 4506} 4507 4508template<class _Tp, class _Up> 4509inline _LIBCPP_INLINE_VISIBILITY 4510shared_ptr<_Tp> 4511static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4512{ 4513 return shared_ptr<_Tp>(__r, 4514 static_cast< 4515 typename shared_ptr<_Tp>::element_type*>(__r.get())); 4516} 4517 4518template<class _Tp, class _Up> 4519inline _LIBCPP_INLINE_VISIBILITY 4520shared_ptr<_Tp> 4521dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4522{ 4523 typedef typename shared_ptr<_Tp>::element_type _ET; 4524 _ET* __p = dynamic_cast<_ET*>(__r.get()); 4525 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 4526} 4527 4528template<class _Tp, class _Up> 4529shared_ptr<_Tp> 4530const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4531{ 4532 typedef typename shared_ptr<_Tp>::element_type _RTp; 4533 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 4534} 4535 4536template<class _Tp, class _Up> 4537shared_ptr<_Tp> 4538reinterpret_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4539{ 4540 return shared_ptr<_Tp>(__r, 4541 reinterpret_cast< 4542 typename shared_ptr<_Tp>::element_type*>(__r.get())); 4543} 4544 4545#ifndef _LIBCPP_NO_RTTI 4546 4547template<class _Dp, class _Tp> 4548inline _LIBCPP_INLINE_VISIBILITY 4549_Dp* 4550get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 4551{ 4552 return __p.template __get_deleter<_Dp>(); 4553} 4554 4555#endif // _LIBCPP_NO_RTTI 4556 4557template<class _Tp> 4558class _LIBCPP_TEMPLATE_VIS weak_ptr 4559{ 4560public: 4561 typedef _Tp element_type; 4562private: 4563 element_type* __ptr_; 4564 __shared_weak_count* __cntrl_; 4565 4566public: 4567 _LIBCPP_INLINE_VISIBILITY 4568 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 4569 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 4570 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4571 _NOEXCEPT; 4572 _LIBCPP_INLINE_VISIBILITY 4573 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 4574 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 4575 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4576 _NOEXCEPT; 4577 4578#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4579 _LIBCPP_INLINE_VISIBILITY 4580 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 4581 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 4582 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4583 _NOEXCEPT; 4584#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4585 ~weak_ptr(); 4586 4587 _LIBCPP_INLINE_VISIBILITY 4588 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 4589 template<class _Yp> 4590 typename enable_if 4591 < 4592 is_convertible<_Yp*, element_type*>::value, 4593 weak_ptr& 4594 >::type 4595 _LIBCPP_INLINE_VISIBILITY 4596 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 4597 4598#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4599 4600 _LIBCPP_INLINE_VISIBILITY 4601 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 4602 template<class _Yp> 4603 typename enable_if 4604 < 4605 is_convertible<_Yp*, element_type*>::value, 4606 weak_ptr& 4607 >::type 4608 _LIBCPP_INLINE_VISIBILITY 4609 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 4610 4611#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4612 4613 template<class _Yp> 4614 typename enable_if 4615 < 4616 is_convertible<_Yp*, element_type*>::value, 4617 weak_ptr& 4618 >::type 4619 _LIBCPP_INLINE_VISIBILITY 4620 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 4621 4622 _LIBCPP_INLINE_VISIBILITY 4623 void swap(weak_ptr& __r) _NOEXCEPT; 4624 _LIBCPP_INLINE_VISIBILITY 4625 void reset() _NOEXCEPT; 4626 4627 _LIBCPP_INLINE_VISIBILITY 4628 long use_count() const _NOEXCEPT 4629 {return __cntrl_ ? __cntrl_->use_count() : 0;} 4630 _LIBCPP_INLINE_VISIBILITY 4631 bool expired() const _NOEXCEPT 4632 {return __cntrl_ == 0 || __cntrl_->use_count() == 0;} 4633 shared_ptr<_Tp> lock() const _NOEXCEPT; 4634 template<class _Up> 4635 _LIBCPP_INLINE_VISIBILITY 4636 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 4637 {return __cntrl_ < __r.__cntrl_;} 4638 template<class _Up> 4639 _LIBCPP_INLINE_VISIBILITY 4640 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 4641 {return __cntrl_ < __r.__cntrl_;} 4642 4643 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 4644 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 4645}; 4646 4647#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 4648template<class _Tp> 4649weak_ptr(shared_ptr<_Tp>) -> weak_ptr<_Tp>; 4650#endif 4651 4652template<class _Tp> 4653inline 4654_LIBCPP_CONSTEXPR 4655weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 4656 : __ptr_(0), 4657 __cntrl_(0) 4658{ 4659} 4660 4661template<class _Tp> 4662inline 4663weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 4664 : __ptr_(__r.__ptr_), 4665 __cntrl_(__r.__cntrl_) 4666{ 4667 if (__cntrl_) 4668 __cntrl_->__add_weak(); 4669} 4670 4671template<class _Tp> 4672template<class _Yp> 4673inline 4674weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 4675 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4676 _NOEXCEPT 4677 : __ptr_(__r.__ptr_), 4678 __cntrl_(__r.__cntrl_) 4679{ 4680 if (__cntrl_) 4681 __cntrl_->__add_weak(); 4682} 4683 4684template<class _Tp> 4685template<class _Yp> 4686inline 4687weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 4688 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4689 _NOEXCEPT 4690 : __ptr_(__r.__ptr_), 4691 __cntrl_(__r.__cntrl_) 4692{ 4693 if (__cntrl_) 4694 __cntrl_->__add_weak(); 4695} 4696 4697#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4698 4699template<class _Tp> 4700inline 4701weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 4702 : __ptr_(__r.__ptr_), 4703 __cntrl_(__r.__cntrl_) 4704{ 4705 __r.__ptr_ = 0; 4706 __r.__cntrl_ = 0; 4707} 4708 4709template<class _Tp> 4710template<class _Yp> 4711inline 4712weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 4713 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4714 _NOEXCEPT 4715 : __ptr_(__r.__ptr_), 4716 __cntrl_(__r.__cntrl_) 4717{ 4718 __r.__ptr_ = 0; 4719 __r.__cntrl_ = 0; 4720} 4721 4722#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4723 4724template<class _Tp> 4725weak_ptr<_Tp>::~weak_ptr() 4726{ 4727 if (__cntrl_) 4728 __cntrl_->__release_weak(); 4729} 4730 4731template<class _Tp> 4732inline 4733weak_ptr<_Tp>& 4734weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 4735{ 4736 weak_ptr(__r).swap(*this); 4737 return *this; 4738} 4739 4740template<class _Tp> 4741template<class _Yp> 4742inline 4743typename enable_if 4744< 4745 is_convertible<_Yp*, _Tp*>::value, 4746 weak_ptr<_Tp>& 4747>::type 4748weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 4749{ 4750 weak_ptr(__r).swap(*this); 4751 return *this; 4752} 4753 4754#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4755 4756template<class _Tp> 4757inline 4758weak_ptr<_Tp>& 4759weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 4760{ 4761 weak_ptr(_VSTD::move(__r)).swap(*this); 4762 return *this; 4763} 4764 4765template<class _Tp> 4766template<class _Yp> 4767inline 4768typename enable_if 4769< 4770 is_convertible<_Yp*, _Tp*>::value, 4771 weak_ptr<_Tp>& 4772>::type 4773weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 4774{ 4775 weak_ptr(_VSTD::move(__r)).swap(*this); 4776 return *this; 4777} 4778 4779#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4780 4781template<class _Tp> 4782template<class _Yp> 4783inline 4784typename enable_if 4785< 4786 is_convertible<_Yp*, _Tp*>::value, 4787 weak_ptr<_Tp>& 4788>::type 4789weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 4790{ 4791 weak_ptr(__r).swap(*this); 4792 return *this; 4793} 4794 4795template<class _Tp> 4796inline 4797void 4798weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 4799{ 4800 _VSTD::swap(__ptr_, __r.__ptr_); 4801 _VSTD::swap(__cntrl_, __r.__cntrl_); 4802} 4803 4804template<class _Tp> 4805inline _LIBCPP_INLINE_VISIBILITY 4806void 4807swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 4808{ 4809 __x.swap(__y); 4810} 4811 4812template<class _Tp> 4813inline 4814void 4815weak_ptr<_Tp>::reset() _NOEXCEPT 4816{ 4817 weak_ptr().swap(*this); 4818} 4819 4820template<class _Tp> 4821template<class _Yp> 4822shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 4823 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4824 : __ptr_(__r.__ptr_), 4825 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 4826{ 4827 if (__cntrl_ == 0) 4828 __throw_bad_weak_ptr(); 4829} 4830 4831template<class _Tp> 4832shared_ptr<_Tp> 4833weak_ptr<_Tp>::lock() const _NOEXCEPT 4834{ 4835 shared_ptr<_Tp> __r; 4836 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 4837 if (__r.__cntrl_) 4838 __r.__ptr_ = __ptr_; 4839 return __r; 4840} 4841 4842#if _LIBCPP_STD_VER > 14 4843template <class _Tp = void> struct owner_less; 4844#else 4845template <class _Tp> struct owner_less; 4846#endif 4847 4848template <class _Tp> 4849struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 4850 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 4851{ 4852 typedef bool result_type; 4853 _LIBCPP_INLINE_VISIBILITY 4854 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4855 {return __x.owner_before(__y);} 4856 _LIBCPP_INLINE_VISIBILITY 4857 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4858 {return __x.owner_before(__y);} 4859 _LIBCPP_INLINE_VISIBILITY 4860 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4861 {return __x.owner_before(__y);} 4862}; 4863 4864template <class _Tp> 4865struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 4866 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 4867{ 4868 typedef bool result_type; 4869 _LIBCPP_INLINE_VISIBILITY 4870 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4871 {return __x.owner_before(__y);} 4872 _LIBCPP_INLINE_VISIBILITY 4873 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4874 {return __x.owner_before(__y);} 4875 _LIBCPP_INLINE_VISIBILITY 4876 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4877 {return __x.owner_before(__y);} 4878}; 4879 4880#if _LIBCPP_STD_VER > 14 4881template <> 4882struct _LIBCPP_TEMPLATE_VIS owner_less<void> 4883{ 4884 template <class _Tp, class _Up> 4885 _LIBCPP_INLINE_VISIBILITY 4886 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 4887 {return __x.owner_before(__y);} 4888 template <class _Tp, class _Up> 4889 _LIBCPP_INLINE_VISIBILITY 4890 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 4891 {return __x.owner_before(__y);} 4892 template <class _Tp, class _Up> 4893 _LIBCPP_INLINE_VISIBILITY 4894 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 4895 {return __x.owner_before(__y);} 4896 template <class _Tp, class _Up> 4897 _LIBCPP_INLINE_VISIBILITY 4898 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 4899 {return __x.owner_before(__y);} 4900 typedef void is_transparent; 4901}; 4902#endif 4903 4904template<class _Tp> 4905class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 4906{ 4907 mutable weak_ptr<_Tp> __weak_this_; 4908protected: 4909 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4910 enable_shared_from_this() _NOEXCEPT {} 4911 _LIBCPP_INLINE_VISIBILITY 4912 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 4913 _LIBCPP_INLINE_VISIBILITY 4914 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 4915 {return *this;} 4916 _LIBCPP_INLINE_VISIBILITY 4917 ~enable_shared_from_this() {} 4918public: 4919 _LIBCPP_INLINE_VISIBILITY 4920 shared_ptr<_Tp> shared_from_this() 4921 {return shared_ptr<_Tp>(__weak_this_);} 4922 _LIBCPP_INLINE_VISIBILITY 4923 shared_ptr<_Tp const> shared_from_this() const 4924 {return shared_ptr<const _Tp>(__weak_this_);} 4925 4926#if _LIBCPP_STD_VER > 14 4927 _LIBCPP_INLINE_VISIBILITY 4928 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 4929 { return __weak_this_; } 4930 4931 _LIBCPP_INLINE_VISIBILITY 4932 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 4933 { return __weak_this_; } 4934#endif // _LIBCPP_STD_VER > 14 4935 4936 template <class _Up> friend class shared_ptr; 4937}; 4938 4939template <class _Tp> 4940struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 4941{ 4942 typedef shared_ptr<_Tp> argument_type; 4943 typedef size_t result_type; 4944 4945 _LIBCPP_INLINE_VISIBILITY 4946 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 4947 { 4948 return hash<typename shared_ptr<_Tp>::element_type*>()(__ptr.get()); 4949 } 4950}; 4951 4952template<class _CharT, class _Traits, class _Yp> 4953inline _LIBCPP_INLINE_VISIBILITY 4954basic_ostream<_CharT, _Traits>& 4955operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 4956 4957 4958#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 4959 4960class _LIBCPP_TYPE_VIS __sp_mut 4961{ 4962 void* __lx; 4963public: 4964 void lock() _NOEXCEPT; 4965 void unlock() _NOEXCEPT; 4966 4967private: 4968 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 4969 __sp_mut(const __sp_mut&); 4970 __sp_mut& operator=(const __sp_mut&); 4971 4972 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 4973}; 4974 4975_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4976__sp_mut& __get_sp_mut(const void*); 4977 4978template <class _Tp> 4979inline _LIBCPP_INLINE_VISIBILITY 4980bool 4981atomic_is_lock_free(const shared_ptr<_Tp>*) 4982{ 4983 return false; 4984} 4985 4986template <class _Tp> 4987_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4988shared_ptr<_Tp> 4989atomic_load(const shared_ptr<_Tp>* __p) 4990{ 4991 __sp_mut& __m = __get_sp_mut(__p); 4992 __m.lock(); 4993 shared_ptr<_Tp> __q = *__p; 4994 __m.unlock(); 4995 return __q; 4996} 4997 4998template <class _Tp> 4999inline _LIBCPP_INLINE_VISIBILITY 5000_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5001shared_ptr<_Tp> 5002atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 5003{ 5004 return atomic_load(__p); 5005} 5006 5007template <class _Tp> 5008_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5009void 5010atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5011{ 5012 __sp_mut& __m = __get_sp_mut(__p); 5013 __m.lock(); 5014 __p->swap(__r); 5015 __m.unlock(); 5016} 5017 5018template <class _Tp> 5019inline _LIBCPP_INLINE_VISIBILITY 5020_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5021void 5022atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5023{ 5024 atomic_store(__p, __r); 5025} 5026 5027template <class _Tp> 5028_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5029shared_ptr<_Tp> 5030atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5031{ 5032 __sp_mut& __m = __get_sp_mut(__p); 5033 __m.lock(); 5034 __p->swap(__r); 5035 __m.unlock(); 5036 return __r; 5037} 5038 5039template <class _Tp> 5040inline _LIBCPP_INLINE_VISIBILITY 5041_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5042shared_ptr<_Tp> 5043atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5044{ 5045 return atomic_exchange(__p, __r); 5046} 5047 5048template <class _Tp> 5049_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5050bool 5051atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5052{ 5053 shared_ptr<_Tp> __temp; 5054 __sp_mut& __m = __get_sp_mut(__p); 5055 __m.lock(); 5056 if (__p->__owner_equivalent(*__v)) 5057 { 5058 _VSTD::swap(__temp, *__p); 5059 *__p = __w; 5060 __m.unlock(); 5061 return true; 5062 } 5063 _VSTD::swap(__temp, *__v); 5064 *__v = *__p; 5065 __m.unlock(); 5066 return false; 5067} 5068 5069template <class _Tp> 5070inline _LIBCPP_INLINE_VISIBILITY 5071_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5072bool 5073atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5074{ 5075 return atomic_compare_exchange_strong(__p, __v, __w); 5076} 5077 5078template <class _Tp> 5079inline _LIBCPP_INLINE_VISIBILITY 5080_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5081bool 5082atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5083 shared_ptr<_Tp> __w, memory_order, memory_order) 5084{ 5085 return atomic_compare_exchange_strong(__p, __v, __w); 5086} 5087 5088template <class _Tp> 5089inline _LIBCPP_INLINE_VISIBILITY 5090_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5091bool 5092atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5093 shared_ptr<_Tp> __w, memory_order, memory_order) 5094{ 5095 return atomic_compare_exchange_weak(__p, __v, __w); 5096} 5097 5098#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5099 5100//enum class 5101#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 5102# ifndef _LIBCPP_CXX03_LANG 5103enum class pointer_safety : unsigned char { 5104 relaxed, 5105 preferred, 5106 strict 5107}; 5108# endif 5109#else 5110struct _LIBCPP_TYPE_VIS pointer_safety 5111{ 5112 enum __lx 5113 { 5114 relaxed, 5115 preferred, 5116 strict 5117 }; 5118 5119 __lx __v_; 5120 5121 _LIBCPP_INLINE_VISIBILITY 5122 pointer_safety() : __v_() {} 5123 5124 _LIBCPP_INLINE_VISIBILITY 5125 pointer_safety(__lx __v) : __v_(__v) {} 5126 _LIBCPP_INLINE_VISIBILITY 5127 operator int() const {return __v_;} 5128}; 5129#endif 5130 5131#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 5132 defined(_LIBCPP_BUILDING_LIBRARY) 5133_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 5134#else 5135// This function is only offered in C++03 under ABI v1. 5136# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 5137inline _LIBCPP_INLINE_VISIBILITY 5138pointer_safety get_pointer_safety() _NOEXCEPT { 5139 return pointer_safety::relaxed; 5140} 5141# endif 5142#endif 5143 5144 5145_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 5146_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 5147_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 5148_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 5149 5150template <class _Tp> 5151inline _LIBCPP_INLINE_VISIBILITY 5152_Tp* 5153undeclare_reachable(_Tp* __p) 5154{ 5155 return static_cast<_Tp*>(__undeclare_reachable(__p)); 5156} 5157 5158_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 5159 5160// --- Helper for container swap -- 5161template <typename _Alloc> 5162inline _LIBCPP_INLINE_VISIBILITY 5163void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 5164#if _LIBCPP_STD_VER >= 14 5165 _NOEXCEPT 5166#else 5167 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5168#endif 5169{ 5170 __swap_allocator(__a1, __a2, 5171 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 5172} 5173 5174template <typename _Alloc> 5175_LIBCPP_INLINE_VISIBILITY 5176void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 5177#if _LIBCPP_STD_VER >= 14 5178 _NOEXCEPT 5179#else 5180 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5181#endif 5182{ 5183 using _VSTD::swap; 5184 swap(__a1, __a2); 5185} 5186 5187template <typename _Alloc> 5188inline _LIBCPP_INLINE_VISIBILITY 5189void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 5190 5191template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 5192struct __noexcept_move_assign_container : public integral_constant<bool, 5193 _Traits::propagate_on_container_move_assignment::value 5194#if _LIBCPP_STD_VER > 14 5195 || _Traits::is_always_equal::value 5196#else 5197 && is_nothrow_move_assignable<_Alloc>::value 5198#endif 5199 > {}; 5200 5201 5202#ifndef _LIBCPP_HAS_NO_VARIADICS 5203template <class _Tp, class _Alloc> 5204struct __temp_value { 5205 typedef allocator_traits<_Alloc> _Traits; 5206 5207 typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; 5208 _Alloc &__a; 5209 5210 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 5211 _Tp & get() { return *__addr(); } 5212 5213 template<class... _Args> 5214 _LIBCPP_NO_CFI 5215 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) { 5216 _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)), 5217 _VSTD::forward<_Args>(__args)...); 5218 } 5219 5220 ~__temp_value() { _Traits::destroy(__a, __addr()); } 5221 }; 5222#endif 5223 5224template<typename _Alloc, typename = void, typename = void> 5225struct __is_allocator : false_type {}; 5226 5227template<typename _Alloc> 5228struct __is_allocator<_Alloc, 5229 typename __void_t<typename _Alloc::value_type>::type, 5230 typename __void_t<decltype(_VSTD::declval<_Alloc&>().allocate(size_t(0)))>::type 5231 > 5232 : true_type {}; 5233 5234// __builtin_new_allocator -- A non-templated helper for allocating and 5235// deallocating memory using __builtin_operator_new and 5236// __builtin_operator_delete. It should be used in preference to 5237// `std::allocator<T>` to avoid additional instantiations. 5238struct __builtin_new_allocator { 5239 struct __builtin_new_deleter { 5240 typedef void* pointer_type; 5241 5242 _LIBCPP_CONSTEXPR explicit __builtin_new_deleter(size_t __size, size_t __align) 5243 : __size_(__size), __align_(__align) {} 5244 5245 void operator()(void* p) const _NOEXCEPT { 5246 std::__libcpp_deallocate(p, __size_, __align_); 5247 } 5248 5249 private: 5250 size_t __size_; 5251 size_t __align_; 5252 }; 5253 5254 typedef unique_ptr<void, __builtin_new_deleter> __holder_t; 5255 5256 static __holder_t __allocate_bytes(size_t __s, size_t __align) { 5257 return __holder_t(std::__libcpp_allocate(__s, __align), 5258 __builtin_new_deleter(__s, __align)); 5259 } 5260 5261 static void __deallocate_bytes(void* __p, size_t __s, 5262 size_t __align) _NOEXCEPT { 5263 std::__libcpp_deallocate(__p, __s, __align); 5264 } 5265 5266 template <class _Tp> 5267 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 5268 static __holder_t __allocate_type(size_t __n) { 5269 return __allocate_bytes(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 5270 } 5271 5272 template <class _Tp> 5273 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 5274 static void __deallocate_type(void* __p, size_t __n) _NOEXCEPT { 5275 __deallocate_bytes(__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 5276 } 5277}; 5278 5279 5280_LIBCPP_END_NAMESPACE_STD 5281 5282_LIBCPP_POP_MACROS 5283 5284#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17 5285# include <__pstl_memory> 5286#endif 5287 5288#endif // _LIBCPP_MEMORY 5289