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