1// -*- C++ -*- 2//===-------------------------- memory ------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_MEMORY 11#define _LIBCPP_MEMORY 12 13/* 14 memory synopsis 15 16namespace std 17{ 18 19struct allocator_arg_t { }; 20inline constexpr allocator_arg_t allocator_arg = allocator_arg_t(); 21 22template <class T, class Alloc> struct uses_allocator; 23 24template <class Ptr> 25struct pointer_traits 26{ 27 typedef Ptr pointer; 28 typedef <details> element_type; 29 typedef <details> difference_type; 30 31 template <class U> using rebind = <details>; 32 33 static pointer pointer_to(<details>); 34}; 35 36template <class T> 37struct pointer_traits<T*> 38{ 39 typedef T* pointer; 40 typedef T element_type; 41 typedef ptrdiff_t difference_type; 42 43 template <class U> using rebind = U*; 44 45 static pointer pointer_to(<details>) noexcept; // constexpr in C++20 46}; 47 48template <class T> constexpr T* to_address(T* p) noexcept; // C++20 49template <class Ptr> auto to_address(const Ptr& p) noexcept; // C++20 50 51template <class Alloc> 52struct allocator_traits 53{ 54 typedef Alloc allocator_type; 55 typedef typename allocator_type::value_type 56 value_type; 57 58 typedef Alloc::pointer | value_type* pointer; 59 typedef Alloc::const_pointer 60 | pointer_traits<pointer>::rebind<const value_type> 61 const_pointer; 62 typedef Alloc::void_pointer 63 | pointer_traits<pointer>::rebind<void> 64 void_pointer; 65 typedef Alloc::const_void_pointer 66 | pointer_traits<pointer>::rebind<const void> 67 const_void_pointer; 68 typedef Alloc::difference_type 69 | pointer_traits<pointer>::difference_type 70 difference_type; 71 typedef Alloc::size_type 72 | make_unsigned<difference_type>::type 73 size_type; 74 typedef Alloc::propagate_on_container_copy_assignment 75 | false_type propagate_on_container_copy_assignment; 76 typedef Alloc::propagate_on_container_move_assignment 77 | false_type propagate_on_container_move_assignment; 78 typedef Alloc::propagate_on_container_swap 79 | false_type propagate_on_container_swap; 80 typedef Alloc::is_always_equal 81 | is_empty is_always_equal; 82 83 template <class T> using rebind_alloc = Alloc::rebind<U>::other | Alloc<T, Args...>; 84 template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>; 85 86 static pointer allocate(allocator_type& a, size_type n); // [[nodiscard]] in C++20 87 static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); // [[nodiscard]] in C++20 88 89 static void deallocate(allocator_type& a, pointer p, size_type n) noexcept; 90 91 template <class T, class... Args> 92 static void construct(allocator_type& a, T* p, Args&&... args); 93 94 template <class T> 95 static void destroy(allocator_type& a, T* p); 96 97 static size_type max_size(const allocator_type& a); // noexcept in C++14 98 99 static allocator_type 100 select_on_container_copy_construction(const allocator_type& a); 101}; 102 103template <> 104class allocator<void> 105{ 106public: 107 typedef void* pointer; 108 typedef const void* const_pointer; 109 typedef void value_type; 110 111 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 112}; 113 114template <class T> 115class allocator 116{ 117public: 118 typedef size_t size_type; 119 typedef ptrdiff_t difference_type; 120 typedef T* pointer; 121 typedef const T* const_pointer; 122 typedef typename add_lvalue_reference<T>::type reference; 123 typedef typename add_lvalue_reference<const T>::type const_reference; 124 typedef T value_type; 125 126 template <class U> struct rebind {typedef allocator<U> other;}; 127 128 constexpr allocator() noexcept; // constexpr in C++20 129 constexpr allocator(const allocator&) noexcept; // constexpr in C++20 130 template <class U> 131 constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20 132 ~allocator(); 133 pointer address(reference x) const noexcept; 134 const_pointer address(const_reference x) const noexcept; 135 pointer allocate(size_type, allocator<void>::const_pointer hint = 0); 136 void deallocate(pointer p, size_type n) noexcept; 137 size_type max_size() const noexcept; 138 template<class U, class... Args> 139 void construct(U* p, Args&&... args); 140 template <class U> 141 void destroy(U* p); 142}; 143 144template <class T, class U> 145bool operator==(const allocator<T>&, const allocator<U>&) noexcept; 146 147template <class T, class U> 148bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; 149 150template <class OutputIterator, class T> 151class raw_storage_iterator 152 : public iterator<output_iterator_tag, 153 T, // purposefully not C++03 154 ptrdiff_t, // purposefully not C++03 155 T*, // purposefully not C++03 156 raw_storage_iterator&> // purposefully not C++03 157{ 158public: 159 explicit raw_storage_iterator(OutputIterator x); 160 raw_storage_iterator& operator*(); 161 raw_storage_iterator& operator=(const T& element); 162 raw_storage_iterator& operator++(); 163 raw_storage_iterator operator++(int); 164}; 165 166template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept; 167template <class T> void return_temporary_buffer(T* p) noexcept; 168 169template <class T> T* addressof(T& r) noexcept; 170template <class T> T* addressof(const T&& r) noexcept = delete; 171 172template <class InputIterator, class ForwardIterator> 173ForwardIterator 174uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result); 175 176template <class InputIterator, class Size, class ForwardIterator> 177ForwardIterator 178uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result); 179 180template <class ForwardIterator, class T> 181void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x); 182 183template <class ForwardIterator, class Size, class T> 184ForwardIterator 185uninitialized_fill_n(ForwardIterator first, Size n, const T& x); 186 187template <class T> 188void destroy_at(T* location); 189 190template <class ForwardIterator> 191 void destroy(ForwardIterator first, ForwardIterator last); 192 193template <class ForwardIterator, class Size> 194 ForwardIterator destroy_n(ForwardIterator first, Size n); 195 196template <class InputIterator, class ForwardIterator> 197 ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result); 198 199template <class InputIterator, class Size, class ForwardIterator> 200 pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result); 201 202template <class ForwardIterator> 203 void uninitialized_value_construct(ForwardIterator first, ForwardIterator last); 204 205template <class ForwardIterator, class Size> 206 ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n); 207 208template <class ForwardIterator> 209 void uninitialized_default_construct(ForwardIterator first, ForwardIterator last); 210 211template <class ForwardIterator, class Size> 212 ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n); 213 214template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17 215 216template<class X> 217class auto_ptr // deprecated in C++11, removed in C++17 218{ 219public: 220 typedef X element_type; 221 222 explicit auto_ptr(X* p =0) throw(); 223 auto_ptr(auto_ptr&) throw(); 224 template<class Y> auto_ptr(auto_ptr<Y>&) throw(); 225 auto_ptr& operator=(auto_ptr&) throw(); 226 template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw(); 227 auto_ptr& operator=(auto_ptr_ref<X> r) throw(); 228 ~auto_ptr() throw(); 229 230 typename add_lvalue_reference<X>::type operator*() const throw(); 231 X* operator->() const throw(); 232 X* get() const throw(); 233 X* release() throw(); 234 void reset(X* p =0) throw(); 235 236 auto_ptr(auto_ptr_ref<X>) throw(); 237 template<class Y> operator auto_ptr_ref<Y>() throw(); 238 template<class Y> operator auto_ptr<Y>() throw(); 239}; 240 241template <class T> 242struct default_delete 243{ 244 constexpr default_delete() noexcept = default; 245 template <class U> default_delete(const default_delete<U>&) noexcept; 246 247 void operator()(T*) const noexcept; 248}; 249 250template <class T> 251struct default_delete<T[]> 252{ 253 constexpr default_delete() noexcept = default; 254 void operator()(T*) const noexcept; 255 template <class U> void operator()(U*) const = delete; 256}; 257 258template <class T, class D = default_delete<T>> 259class unique_ptr 260{ 261public: 262 typedef see below pointer; 263 typedef T element_type; 264 typedef D deleter_type; 265 266 // constructors 267 constexpr unique_ptr() noexcept; 268 explicit unique_ptr(pointer p) noexcept; 269 unique_ptr(pointer p, see below d1) noexcept; 270 unique_ptr(pointer p, see below d2) noexcept; 271 unique_ptr(unique_ptr&& u) noexcept; 272 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 273 template <class U, class E> 274 unique_ptr(unique_ptr<U, E>&& u) noexcept; 275 template <class U> 276 unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17 277 278 // destructor 279 ~unique_ptr(); 280 281 // assignment 282 unique_ptr& operator=(unique_ptr&& u) noexcept; 283 template <class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept; 284 unique_ptr& operator=(nullptr_t) noexcept; 285 286 // observers 287 typename add_lvalue_reference<T>::type operator*() const; 288 pointer operator->() const noexcept; 289 pointer get() const noexcept; 290 deleter_type& get_deleter() noexcept; 291 const deleter_type& get_deleter() const noexcept; 292 explicit operator bool() const noexcept; 293 294 // modifiers 295 pointer release() noexcept; 296 void reset(pointer p = pointer()) noexcept; 297 void swap(unique_ptr& u) noexcept; 298}; 299 300template <class T, class D> 301class unique_ptr<T[], D> 302{ 303public: 304 typedef implementation-defined pointer; 305 typedef T element_type; 306 typedef D deleter_type; 307 308 // constructors 309 constexpr unique_ptr() noexcept; 310 explicit unique_ptr(pointer p) noexcept; 311 unique_ptr(pointer p, see below d) noexcept; 312 unique_ptr(pointer p, see below d) noexcept; 313 unique_ptr(unique_ptr&& u) noexcept; 314 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 315 316 // destructor 317 ~unique_ptr(); 318 319 // assignment 320 unique_ptr& operator=(unique_ptr&& u) noexcept; 321 unique_ptr& operator=(nullptr_t) noexcept; 322 323 // observers 324 T& operator[](size_t i) const; 325 pointer get() const noexcept; 326 deleter_type& get_deleter() noexcept; 327 const deleter_type& get_deleter() const noexcept; 328 explicit operator bool() const noexcept; 329 330 // modifiers 331 pointer release() noexcept; 332 void reset(pointer p = pointer()) noexcept; 333 void reset(nullptr_t) noexcept; 334 template <class U> void reset(U) = delete; 335 void swap(unique_ptr& u) noexcept; 336}; 337 338template <class T, class D> 339 void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept; 340 341template <class T1, class D1, class T2, class D2> 342 bool operator==(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 343template <class T1, class D1, class T2, class D2> 344 bool operator!=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 345template <class T1, class D1, class T2, class D2> 346 bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 347template <class T1, class D1, class T2, class D2> 348 bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 349template <class T1, class D1, class T2, class D2> 350 bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 351template <class T1, class D1, class T2, class D2> 352 bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 353 354template <class T, class D> 355 bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; 356template <class T, class D> 357 bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept; 358template <class T, class D> 359 bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; 360template <class T, class D> 361 bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept; 362 363template <class T, class D> 364 bool operator<(const unique_ptr<T, D>& x, nullptr_t); 365template <class T, class D> 366 bool operator<(nullptr_t, const unique_ptr<T, D>& y); 367template <class T, class D> 368 bool operator<=(const unique_ptr<T, D>& x, nullptr_t); 369template <class T, class D> 370 bool operator<=(nullptr_t, const unique_ptr<T, D>& y); 371template <class T, class D> 372 bool operator>(const unique_ptr<T, D>& x, nullptr_t); 373template <class T, class D> 374 bool operator>(nullptr_t, const unique_ptr<T, D>& y); 375template <class T, class D> 376 bool operator>=(const unique_ptr<T, D>& x, nullptr_t); 377template <class T, class D> 378 bool operator>=(nullptr_t, const unique_ptr<T, D>& y); 379 380class bad_weak_ptr 381 : public std::exception 382{ 383 bad_weak_ptr() noexcept; 384}; 385 386template<class T, class... Args> unique_ptr<T> make_unique(Args&&... args); // C++14 387template<class T> unique_ptr<T> make_unique(size_t n); // C++14 388template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N] 389 390template<class E, class T, class Y, class D> 391 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, unique_ptr<Y, D> const& p); 392 393template<class T> 394class shared_ptr 395{ 396public: 397 typedef T element_type; 398 typedef weak_ptr<T> weak_type; // C++17 399 400 // constructors: 401 constexpr shared_ptr() noexcept; 402 template<class Y> explicit shared_ptr(Y* p); 403 template<class Y, class D> shared_ptr(Y* p, D d); 404 template<class Y, class D, class A> shared_ptr(Y* p, D d, A a); 405 template <class D> shared_ptr(nullptr_t p, D d); 406 template <class D, class A> shared_ptr(nullptr_t p, D d, A a); 407 template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept; 408 shared_ptr(const shared_ptr& r) noexcept; 409 template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept; 410 shared_ptr(shared_ptr&& r) noexcept; 411 template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept; 412 template<class Y> explicit shared_ptr(const weak_ptr<Y>& r); 413 template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17 414 template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r); 415 shared_ptr(nullptr_t) : shared_ptr() { } 416 417 // destructor: 418 ~shared_ptr(); 419 420 // assignment: 421 shared_ptr& operator=(const shared_ptr& r) noexcept; 422 template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept; 423 shared_ptr& operator=(shared_ptr&& r) noexcept; 424 template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r); 425 template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17 426 template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r); 427 428 // modifiers: 429 void swap(shared_ptr& r) noexcept; 430 void reset() noexcept; 431 template<class Y> void reset(Y* p); 432 template<class Y, class D> void reset(Y* p, D d); 433 template<class Y, class D, class A> void reset(Y* p, D d, A a); 434 435 // observers: 436 T* get() const noexcept; 437 T& operator*() const noexcept; 438 T* operator->() const noexcept; 439 long use_count() const noexcept; 440 bool unique() const noexcept; 441 explicit operator bool() const noexcept; 442 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 443 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 444}; 445 446// shared_ptr comparisons: 447template<class T, class U> 448 bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 449template<class T, class U> 450 bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 451template<class T, class U> 452 bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 453template<class T, class U> 454 bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 455template<class T, class U> 456 bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 457template<class T, class U> 458 bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 459 460template <class T> 461 bool operator==(const shared_ptr<T>& x, nullptr_t) noexcept; 462template <class T> 463 bool operator==(nullptr_t, const shared_ptr<T>& y) noexcept; 464template <class T> 465 bool operator!=(const shared_ptr<T>& x, nullptr_t) noexcept; 466template <class T> 467 bool operator!=(nullptr_t, const shared_ptr<T>& y) noexcept; 468template <class T> 469 bool operator<(const shared_ptr<T>& x, nullptr_t) noexcept; 470template <class T> 471bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept; 472template <class T> 473 bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept; 474template <class T> 475 bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept; 476template <class T> 477 bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept; 478template <class T> 479 bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept; 480template <class T> 481 bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept; 482template <class T> 483 bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept; 484 485// shared_ptr specialized algorithms: 486template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept; 487 488// shared_ptr casts: 489template<class T, class U> 490 shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept; 491template<class T, class U> 492 shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept; 493template<class T, class U> 494 shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept; 495 496// shared_ptr I/O: 497template<class E, class T, class Y> 498 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p); 499 500// shared_ptr get_deleter: 501template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept; 502 503template<class T, class... Args> 504 shared_ptr<T> make_shared(Args&&... args); 505template<class T, class A, class... Args> 506 shared_ptr<T> allocate_shared(const A& a, Args&&... args); 507 508template<class T> 509class weak_ptr 510{ 511public: 512 typedef T element_type; 513 514 // constructors 515 constexpr weak_ptr() noexcept; 516 template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept; 517 weak_ptr(weak_ptr const& r) noexcept; 518 template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept; 519 weak_ptr(weak_ptr&& r) noexcept; // C++14 520 template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14 521 522 // destructor 523 ~weak_ptr(); 524 525 // assignment 526 weak_ptr& operator=(weak_ptr const& r) noexcept; 527 template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept; 528 template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept; 529 weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14 530 template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14 531 532 // modifiers 533 void swap(weak_ptr& r) noexcept; 534 void reset() noexcept; 535 536 // observers 537 long use_count() const noexcept; 538 bool expired() const noexcept; 539 shared_ptr<T> lock() const noexcept; 540 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 541 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 542}; 543 544// weak_ptr specialized algorithms: 545template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept; 546 547// class owner_less: 548template<class T> struct owner_less; 549 550template<class T> 551struct owner_less<shared_ptr<T>> 552 : binary_function<shared_ptr<T>, shared_ptr<T>, bool> 553{ 554 typedef bool result_type; 555 bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept; 556 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 557 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 558}; 559 560template<class T> 561struct owner_less<weak_ptr<T>> 562 : binary_function<weak_ptr<T>, weak_ptr<T>, bool> 563{ 564 typedef bool result_type; 565 bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept; 566 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 567 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 568}; 569 570template <> // Added in C++14 571struct owner_less<void> 572{ 573 template <class _Tp, class _Up> 574 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 575 template <class _Tp, class _Up> 576 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 577 template <class _Tp, class _Up> 578 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 579 template <class _Tp, class _Up> 580 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 581 582 typedef void is_transparent; 583}; 584 585template<class T> 586class enable_shared_from_this 587{ 588protected: 589 constexpr enable_shared_from_this() noexcept; 590 enable_shared_from_this(enable_shared_from_this const&) noexcept; 591 enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept; 592 ~enable_shared_from_this(); 593public: 594 shared_ptr<T> shared_from_this(); 595 shared_ptr<T const> shared_from_this() const; 596}; 597 598template<class T> 599 bool atomic_is_lock_free(const shared_ptr<T>* p); 600template<class T> 601 shared_ptr<T> atomic_load(const shared_ptr<T>* p); 602template<class T> 603 shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo); 604template<class T> 605 void atomic_store(shared_ptr<T>* p, shared_ptr<T> r); 606template<class T> 607 void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 608template<class T> 609 shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r); 610template<class T> 611 shared_ptr<T> 612 atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 613template<class T> 614 bool 615 atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 616template<class T> 617 bool 618 atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 619template<class T> 620 bool 621 atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 622 shared_ptr<T> w, memory_order success, 623 memory_order failure); 624template<class T> 625 bool 626 atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 627 shared_ptr<T> w, memory_order success, 628 memory_order failure); 629// Hash support 630template <class T> struct hash; 631template <class T, class D> struct hash<unique_ptr<T, D> >; 632template <class T> struct hash<shared_ptr<T> >; 633 634template <class T, class Alloc> 635 inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value; 636 637// Pointer safety 638enum class pointer_safety { relaxed, preferred, strict }; 639void declare_reachable(void *p); 640template <class T> T *undeclare_reachable(T *p); 641void declare_no_pointers(char *p, size_t n); 642void undeclare_no_pointers(char *p, size_t n); 643pointer_safety get_pointer_safety() noexcept; 644 645void* align(size_t alignment, size_t size, void*& ptr, size_t& space); 646 647} // std 648 649*/ 650 651#include <__config> 652#include <type_traits> 653#include <typeinfo> 654#include <cstddef> 655#include <cstdint> 656#include <new> 657#include <utility> 658#include <limits> 659#include <iterator> 660#include <__functional_base> 661#include <iosfwd> 662#include <tuple> 663#include <stdexcept> 664#include <cstring> 665#include <cassert> 666#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 667# include <atomic> 668#endif 669#include <version> 670 671#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 672#pragma GCC system_header 673#endif 674 675_LIBCPP_PUSH_MACROS 676#include <__undef_macros> 677 678 679_LIBCPP_BEGIN_NAMESPACE_STD 680 681template <class _ValueType> 682inline _LIBCPP_INLINE_VISIBILITY 683_ValueType __libcpp_relaxed_load(_ValueType const* __value) { 684#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 685 defined(__ATOMIC_RELAXED) && \ 686 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 687 return __atomic_load_n(__value, __ATOMIC_RELAXED); 688#else 689 return *__value; 690#endif 691} 692 693template <class _ValueType> 694inline _LIBCPP_INLINE_VISIBILITY 695_ValueType __libcpp_acquire_load(_ValueType const* __value) { 696#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 697 defined(__ATOMIC_ACQUIRE) && \ 698 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 699 return __atomic_load_n(__value, __ATOMIC_ACQUIRE); 700#else 701 return *__value; 702#endif 703} 704 705// addressof moved to <type_traits> 706 707template <class _Tp> class allocator; 708 709template <> 710class _LIBCPP_TEMPLATE_VIS allocator<void> 711{ 712public: 713 typedef void* pointer; 714 typedef const void* const_pointer; 715 typedef void value_type; 716 717 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 718}; 719 720template <> 721class _LIBCPP_TEMPLATE_VIS allocator<const void> 722{ 723public: 724 typedef const void* pointer; 725 typedef const void* const_pointer; 726 typedef const void value_type; 727 728 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 729}; 730 731// pointer_traits 732 733template <class _Tp, class = void> 734struct __has_element_type : false_type {}; 735 736template <class _Tp> 737struct __has_element_type<_Tp, 738 typename __void_t<typename _Tp::element_type>::type> : true_type {}; 739 740template <class _Ptr, bool = __has_element_type<_Ptr>::value> 741struct __pointer_traits_element_type; 742 743template <class _Ptr> 744struct __pointer_traits_element_type<_Ptr, true> 745{ 746 typedef typename _Ptr::element_type type; 747}; 748 749#ifndef _LIBCPP_HAS_NO_VARIADICS 750 751template <template <class, class...> class _Sp, class _Tp, class ..._Args> 752struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, true> 753{ 754 typedef typename _Sp<_Tp, _Args...>::element_type type; 755}; 756 757template <template <class, class...> class _Sp, class _Tp, class ..._Args> 758struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, false> 759{ 760 typedef _Tp type; 761}; 762 763#else // _LIBCPP_HAS_NO_VARIADICS 764 765template <template <class> class _Sp, class _Tp> 766struct __pointer_traits_element_type<_Sp<_Tp>, true> 767{ 768 typedef typename _Sp<_Tp>::element_type type; 769}; 770 771template <template <class> class _Sp, class _Tp> 772struct __pointer_traits_element_type<_Sp<_Tp>, false> 773{ 774 typedef _Tp type; 775}; 776 777template <template <class, class> class _Sp, class _Tp, class _A0> 778struct __pointer_traits_element_type<_Sp<_Tp, _A0>, true> 779{ 780 typedef typename _Sp<_Tp, _A0>::element_type type; 781}; 782 783template <template <class, class> class _Sp, class _Tp, class _A0> 784struct __pointer_traits_element_type<_Sp<_Tp, _A0>, false> 785{ 786 typedef _Tp type; 787}; 788 789template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1> 790struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, true> 791{ 792 typedef typename _Sp<_Tp, _A0, _A1>::element_type type; 793}; 794 795template <template <class, class, class> class _Sp, class _Tp, class _A0, class _A1> 796struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1>, false> 797{ 798 typedef _Tp type; 799}; 800 801template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 802 class _A1, class _A2> 803struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, true> 804{ 805 typedef typename _Sp<_Tp, _A0, _A1, _A2>::element_type type; 806}; 807 808template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 809 class _A1, class _A2> 810struct __pointer_traits_element_type<_Sp<_Tp, _A0, _A1, _A2>, false> 811{ 812 typedef _Tp type; 813}; 814 815#endif // _LIBCPP_HAS_NO_VARIADICS 816 817template <class _Tp, class = void> 818struct __has_difference_type : false_type {}; 819 820template <class _Tp> 821struct __has_difference_type<_Tp, 822 typename __void_t<typename _Tp::difference_type>::type> : true_type {}; 823 824template <class _Ptr, bool = __has_difference_type<_Ptr>::value> 825struct __pointer_traits_difference_type 826{ 827 typedef ptrdiff_t type; 828}; 829 830template <class _Ptr> 831struct __pointer_traits_difference_type<_Ptr, true> 832{ 833 typedef typename _Ptr::difference_type type; 834}; 835 836template <class _Tp, class _Up> 837struct __has_rebind 838{ 839private: 840 struct __two {char __lx; char __lxx;}; 841 template <class _Xp> static __two __test(...); 842 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>* = 0); 843public: 844 static const bool value = sizeof(__test<_Tp>(0)) == 1; 845}; 846 847template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 848struct __pointer_traits_rebind 849{ 850#ifndef _LIBCPP_CXX03_LANG 851 typedef typename _Tp::template rebind<_Up> type; 852#else 853 typedef typename _Tp::template rebind<_Up>::other type; 854#endif 855}; 856 857#ifndef _LIBCPP_HAS_NO_VARIADICS 858 859template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 860struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, true> 861{ 862#ifndef _LIBCPP_CXX03_LANG 863 typedef typename _Sp<_Tp, _Args...>::template rebind<_Up> type; 864#else 865 typedef typename _Sp<_Tp, _Args...>::template rebind<_Up>::other type; 866#endif 867}; 868 869template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 870struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, false> 871{ 872 typedef _Sp<_Up, _Args...> type; 873}; 874 875#else // _LIBCPP_HAS_NO_VARIADICS 876 877template <template <class> class _Sp, class _Tp, class _Up> 878struct __pointer_traits_rebind<_Sp<_Tp>, _Up, true> 879{ 880#ifndef _LIBCPP_CXX03_LANG 881 typedef typename _Sp<_Tp>::template rebind<_Up> type; 882#else 883 typedef typename _Sp<_Tp>::template rebind<_Up>::other type; 884#endif 885}; 886 887template <template <class> class _Sp, class _Tp, class _Up> 888struct __pointer_traits_rebind<_Sp<_Tp>, _Up, false> 889{ 890 typedef _Sp<_Up> type; 891}; 892 893template <template <class, class> class _Sp, class _Tp, class _A0, class _Up> 894struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, true> 895{ 896#ifndef _LIBCPP_CXX03_LANG 897 typedef typename _Sp<_Tp, _A0>::template rebind<_Up> type; 898#else 899 typedef typename _Sp<_Tp, _A0>::template rebind<_Up>::other type; 900#endif 901}; 902 903template <template <class, class> class _Sp, class _Tp, class _A0, class _Up> 904struct __pointer_traits_rebind<_Sp<_Tp, _A0>, _Up, false> 905{ 906 typedef _Sp<_Up, _A0> type; 907}; 908 909template <template <class, class, class> class _Sp, class _Tp, class _A0, 910 class _A1, class _Up> 911struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, true> 912{ 913#ifndef _LIBCPP_CXX03_LANG 914 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up> type; 915#else 916 typedef typename _Sp<_Tp, _A0, _A1>::template rebind<_Up>::other type; 917#endif 918}; 919 920template <template <class, class, class> class _Sp, class _Tp, class _A0, 921 class _A1, class _Up> 922struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1>, _Up, false> 923{ 924 typedef _Sp<_Up, _A0, _A1> type; 925}; 926 927template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 928 class _A1, class _A2, class _Up> 929struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, true> 930{ 931#ifndef _LIBCPP_CXX03_LANG 932 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up> type; 933#else 934 typedef typename _Sp<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type; 935#endif 936}; 937 938template <template <class, class, class, class> class _Sp, class _Tp, class _A0, 939 class _A1, class _A2, class _Up> 940struct __pointer_traits_rebind<_Sp<_Tp, _A0, _A1, _A2>, _Up, false> 941{ 942 typedef _Sp<_Up, _A0, _A1, _A2> type; 943}; 944 945#endif // _LIBCPP_HAS_NO_VARIADICS 946 947template <class _Ptr> 948struct _LIBCPP_TEMPLATE_VIS pointer_traits 949{ 950 typedef _Ptr pointer; 951 typedef typename __pointer_traits_element_type<pointer>::type element_type; 952 typedef typename __pointer_traits_difference_type<pointer>::type difference_type; 953 954#ifndef _LIBCPP_CXX03_LANG 955 template <class _Up> using rebind = typename __pointer_traits_rebind<pointer, _Up>::type; 956#else 957 template <class _Up> struct rebind 958 {typedef typename __pointer_traits_rebind<pointer, _Up>::type other;}; 959#endif // _LIBCPP_CXX03_LANG 960 961private: 962 struct __nat {}; 963public: 964 _LIBCPP_INLINE_VISIBILITY 965 static pointer pointer_to(typename conditional<is_void<element_type>::value, 966 __nat, element_type>::type& __r) 967 {return pointer::pointer_to(__r);} 968}; 969 970template <class _Tp> 971struct _LIBCPP_TEMPLATE_VIS pointer_traits<_Tp*> 972{ 973 typedef _Tp* pointer; 974 typedef _Tp element_type; 975 typedef ptrdiff_t difference_type; 976 977#ifndef _LIBCPP_CXX03_LANG 978 template <class _Up> using rebind = _Up*; 979#else 980 template <class _Up> struct rebind {typedef _Up* other;}; 981#endif 982 983private: 984 struct __nat {}; 985public: 986 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 987 static pointer pointer_to(typename conditional<is_void<element_type>::value, 988 __nat, element_type>::type& __r) _NOEXCEPT 989 {return _VSTD::addressof(__r);} 990}; 991 992template <class _From, class _To> 993struct __rebind_pointer { 994#ifndef _LIBCPP_CXX03_LANG 995 typedef typename pointer_traits<_From>::template rebind<_To> type; 996#else 997 typedef typename pointer_traits<_From>::template rebind<_To>::other type; 998#endif 999}; 1000 1001// allocator_traits 1002 1003template <class _Tp, class = void> 1004struct __has_pointer_type : false_type {}; 1005 1006template <class _Tp> 1007struct __has_pointer_type<_Tp, 1008 typename __void_t<typename _Tp::pointer>::type> : true_type {}; 1009 1010namespace __pointer_type_imp 1011{ 1012 1013template <class _Tp, class _Dp, bool = __has_pointer_type<_Dp>::value> 1014struct __pointer_type 1015{ 1016 typedef typename _Dp::pointer type; 1017}; 1018 1019template <class _Tp, class _Dp> 1020struct __pointer_type<_Tp, _Dp, false> 1021{ 1022 typedef _Tp* type; 1023}; 1024 1025} // __pointer_type_imp 1026 1027template <class _Tp, class _Dp> 1028struct __pointer_type 1029{ 1030 typedef typename __pointer_type_imp::__pointer_type<_Tp, typename remove_reference<_Dp>::type>::type type; 1031}; 1032 1033template <class _Tp, class = void> 1034struct __has_const_pointer : false_type {}; 1035 1036template <class _Tp> 1037struct __has_const_pointer<_Tp, 1038 typename __void_t<typename _Tp::const_pointer>::type> : true_type {}; 1039 1040template <class _Tp, class _Ptr, class _Alloc, bool = __has_const_pointer<_Alloc>::value> 1041struct __const_pointer 1042{ 1043 typedef typename _Alloc::const_pointer type; 1044}; 1045 1046template <class _Tp, class _Ptr, class _Alloc> 1047struct __const_pointer<_Tp, _Ptr, _Alloc, false> 1048{ 1049#ifndef _LIBCPP_CXX03_LANG 1050 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp> type; 1051#else 1052 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp>::other type; 1053#endif 1054}; 1055 1056template <class _Tp, class = void> 1057struct __has_void_pointer : false_type {}; 1058 1059template <class _Tp> 1060struct __has_void_pointer<_Tp, 1061 typename __void_t<typename _Tp::void_pointer>::type> : true_type {}; 1062 1063template <class _Ptr, class _Alloc, bool = __has_void_pointer<_Alloc>::value> 1064struct __void_pointer 1065{ 1066 typedef typename _Alloc::void_pointer type; 1067}; 1068 1069template <class _Ptr, class _Alloc> 1070struct __void_pointer<_Ptr, _Alloc, false> 1071{ 1072#ifndef _LIBCPP_CXX03_LANG 1073 typedef typename pointer_traits<_Ptr>::template rebind<void> type; 1074#else 1075 typedef typename pointer_traits<_Ptr>::template rebind<void>::other type; 1076#endif 1077}; 1078 1079template <class _Tp, class = void> 1080struct __has_const_void_pointer : false_type {}; 1081 1082template <class _Tp> 1083struct __has_const_void_pointer<_Tp, 1084 typename __void_t<typename _Tp::const_void_pointer>::type> : true_type {}; 1085 1086template <class _Ptr, class _Alloc, bool = __has_const_void_pointer<_Alloc>::value> 1087struct __const_void_pointer 1088{ 1089 typedef typename _Alloc::const_void_pointer type; 1090}; 1091 1092template <class _Ptr, class _Alloc> 1093struct __const_void_pointer<_Ptr, _Alloc, false> 1094{ 1095#ifndef _LIBCPP_CXX03_LANG 1096 typedef typename pointer_traits<_Ptr>::template rebind<const void> type; 1097#else 1098 typedef typename pointer_traits<_Ptr>::template rebind<const void>::other type; 1099#endif 1100}; 1101 1102template <class _Tp> 1103inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1104_Tp* 1105__to_raw_pointer(_Tp* __p) _NOEXCEPT 1106{ 1107 return __p; 1108} 1109 1110#if _LIBCPP_STD_VER <= 17 1111template <class _Pointer> 1112inline _LIBCPP_INLINE_VISIBILITY 1113typename pointer_traits<_Pointer>::element_type* 1114__to_raw_pointer(_Pointer __p) _NOEXCEPT 1115{ 1116 return _VSTD::__to_raw_pointer(__p.operator->()); 1117} 1118#else 1119template <class _Pointer> 1120inline _LIBCPP_INLINE_VISIBILITY 1121auto 1122__to_raw_pointer(const _Pointer& __p) _NOEXCEPT 1123-> decltype(pointer_traits<_Pointer>::to_address(__p)) 1124{ 1125 return pointer_traits<_Pointer>::to_address(__p); 1126} 1127 1128template <class _Pointer, class... _None> 1129inline _LIBCPP_INLINE_VISIBILITY 1130auto 1131__to_raw_pointer(const _Pointer& __p, _None...) _NOEXCEPT 1132{ 1133 return _VSTD::__to_raw_pointer(__p.operator->()); 1134} 1135 1136template <class _Tp> 1137inline _LIBCPP_INLINE_VISIBILITY constexpr 1138_Tp* 1139to_address(_Tp* __p) _NOEXCEPT 1140{ 1141 static_assert(!is_function_v<_Tp>, "_Tp is a function type"); 1142 return __p; 1143} 1144 1145template <class _Pointer> 1146inline _LIBCPP_INLINE_VISIBILITY 1147auto 1148to_address(const _Pointer& __p) _NOEXCEPT 1149{ 1150 return _VSTD::__to_raw_pointer(__p); 1151} 1152#endif 1153 1154template <class _Tp, class = void> 1155struct __has_size_type : false_type {}; 1156 1157template <class _Tp> 1158struct __has_size_type<_Tp, 1159 typename __void_t<typename _Tp::size_type>::type> : true_type {}; 1160 1161template <class _Alloc, class _DiffType, bool = __has_size_type<_Alloc>::value> 1162struct __size_type 1163{ 1164 typedef typename make_unsigned<_DiffType>::type type; 1165}; 1166 1167template <class _Alloc, class _DiffType> 1168struct __size_type<_Alloc, _DiffType, true> 1169{ 1170 typedef typename _Alloc::size_type type; 1171}; 1172 1173template <class _Tp, class = void> 1174struct __has_propagate_on_container_copy_assignment : false_type {}; 1175 1176template <class _Tp> 1177struct __has_propagate_on_container_copy_assignment<_Tp, 1178 typename __void_t<typename _Tp::propagate_on_container_copy_assignment>::type> 1179 : true_type {}; 1180 1181template <class _Alloc, bool = __has_propagate_on_container_copy_assignment<_Alloc>::value> 1182struct __propagate_on_container_copy_assignment 1183{ 1184 typedef false_type type; 1185}; 1186 1187template <class _Alloc> 1188struct __propagate_on_container_copy_assignment<_Alloc, true> 1189{ 1190 typedef typename _Alloc::propagate_on_container_copy_assignment type; 1191}; 1192 1193template <class _Tp, class = void> 1194struct __has_propagate_on_container_move_assignment : false_type {}; 1195 1196template <class _Tp> 1197struct __has_propagate_on_container_move_assignment<_Tp, 1198 typename __void_t<typename _Tp::propagate_on_container_move_assignment>::type> 1199 : true_type {}; 1200 1201template <class _Alloc, bool = __has_propagate_on_container_move_assignment<_Alloc>::value> 1202struct __propagate_on_container_move_assignment 1203{ 1204 typedef false_type type; 1205}; 1206 1207template <class _Alloc> 1208struct __propagate_on_container_move_assignment<_Alloc, true> 1209{ 1210 typedef typename _Alloc::propagate_on_container_move_assignment type; 1211}; 1212 1213template <class _Tp, class = void> 1214struct __has_propagate_on_container_swap : false_type {}; 1215 1216template <class _Tp> 1217struct __has_propagate_on_container_swap<_Tp, 1218 typename __void_t<typename _Tp::propagate_on_container_swap>::type> 1219 : true_type {}; 1220 1221template <class _Alloc, bool = __has_propagate_on_container_swap<_Alloc>::value> 1222struct __propagate_on_container_swap 1223{ 1224 typedef false_type type; 1225}; 1226 1227template <class _Alloc> 1228struct __propagate_on_container_swap<_Alloc, true> 1229{ 1230 typedef typename _Alloc::propagate_on_container_swap type; 1231}; 1232 1233template <class _Tp, class = void> 1234struct __has_is_always_equal : false_type {}; 1235 1236template <class _Tp> 1237struct __has_is_always_equal<_Tp, 1238 typename __void_t<typename _Tp::is_always_equal>::type> 1239 : true_type {}; 1240 1241template <class _Alloc, bool = __has_is_always_equal<_Alloc>::value> 1242struct __is_always_equal 1243{ 1244 typedef typename _VSTD::is_empty<_Alloc>::type type; 1245}; 1246 1247template <class _Alloc> 1248struct __is_always_equal<_Alloc, true> 1249{ 1250 typedef typename _Alloc::is_always_equal type; 1251}; 1252 1253template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 1254struct __has_rebind_other 1255{ 1256private: 1257 struct __two {char __lx; char __lxx;}; 1258 template <class _Xp> static __two __test(...); 1259 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>::other* = 0); 1260public: 1261 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1262}; 1263 1264template <class _Tp, class _Up> 1265struct __has_rebind_other<_Tp, _Up, false> 1266{ 1267 static const bool value = false; 1268}; 1269 1270template <class _Tp, class _Up, bool = __has_rebind_other<_Tp, _Up>::value> 1271struct __allocator_traits_rebind 1272{ 1273 typedef typename _Tp::template rebind<_Up>::other type; 1274}; 1275 1276#ifndef _LIBCPP_HAS_NO_VARIADICS 1277 1278template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1279struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, true> 1280{ 1281 typedef typename _Alloc<_Tp, _Args...>::template rebind<_Up>::other type; 1282}; 1283 1284template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1285struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, false> 1286{ 1287 typedef _Alloc<_Up, _Args...> type; 1288}; 1289 1290#else // _LIBCPP_HAS_NO_VARIADICS 1291 1292template <template <class> class _Alloc, class _Tp, class _Up> 1293struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, true> 1294{ 1295 typedef typename _Alloc<_Tp>::template rebind<_Up>::other type; 1296}; 1297 1298template <template <class> class _Alloc, class _Tp, class _Up> 1299struct __allocator_traits_rebind<_Alloc<_Tp>, _Up, false> 1300{ 1301 typedef _Alloc<_Up> type; 1302}; 1303 1304template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up> 1305struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, true> 1306{ 1307 typedef typename _Alloc<_Tp, _A0>::template rebind<_Up>::other type; 1308}; 1309 1310template <template <class, class> class _Alloc, class _Tp, class _A0, class _Up> 1311struct __allocator_traits_rebind<_Alloc<_Tp, _A0>, _Up, false> 1312{ 1313 typedef _Alloc<_Up, _A0> type; 1314}; 1315 1316template <template <class, class, class> class _Alloc, class _Tp, class _A0, 1317 class _A1, class _Up> 1318struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, true> 1319{ 1320 typedef typename _Alloc<_Tp, _A0, _A1>::template rebind<_Up>::other type; 1321}; 1322 1323template <template <class, class, class> class _Alloc, class _Tp, class _A0, 1324 class _A1, class _Up> 1325struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1>, _Up, false> 1326{ 1327 typedef _Alloc<_Up, _A0, _A1> type; 1328}; 1329 1330template <template <class, class, class, class> class _Alloc, class _Tp, class _A0, 1331 class _A1, class _A2, class _Up> 1332struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, true> 1333{ 1334 typedef typename _Alloc<_Tp, _A0, _A1, _A2>::template rebind<_Up>::other type; 1335}; 1336 1337template <template <class, class, class, class> class _Alloc, class _Tp, class _A0, 1338 class _A1, class _A2, class _Up> 1339struct __allocator_traits_rebind<_Alloc<_Tp, _A0, _A1, _A2>, _Up, false> 1340{ 1341 typedef _Alloc<_Up, _A0, _A1, _A2> type; 1342}; 1343 1344#endif // _LIBCPP_HAS_NO_VARIADICS 1345 1346#ifndef _LIBCPP_CXX03_LANG 1347 1348template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1349auto 1350__has_allocate_hint_test(_Alloc&& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1351 -> decltype((void)__a.allocate(__sz, __p), true_type()); 1352 1353template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1354auto 1355__has_allocate_hint_test(const _Alloc& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1356 -> false_type; 1357 1358template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1359struct __has_allocate_hint 1360 : integral_constant<bool, 1361 is_same< 1362 decltype(_VSTD::__has_allocate_hint_test(declval<_Alloc>(), 1363 declval<_SizeType>(), 1364 declval<_ConstVoidPtr>())), 1365 true_type>::value> 1366{ 1367}; 1368 1369#else // _LIBCPP_CXX03_LANG 1370 1371template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1372struct __has_allocate_hint 1373 : true_type 1374{ 1375}; 1376 1377#endif // _LIBCPP_CXX03_LANG 1378 1379#if !defined(_LIBCPP_CXX03_LANG) 1380 1381template <class _Alloc, class _Tp, class ..._Args> 1382decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Tp*>(), 1383 _VSTD::declval<_Args>()...), 1384 true_type()) 1385__has_construct_test(_Alloc&& __a, _Tp* __p, _Args&& ...__args); 1386 1387template <class _Alloc, class _Pointer, class ..._Args> 1388false_type 1389__has_construct_test(const _Alloc& __a, _Pointer&& __p, _Args&& ...__args); 1390 1391template <class _Alloc, class _Pointer, class ..._Args> 1392struct __has_construct 1393 : integral_constant<bool, 1394 is_same< 1395 decltype(_VSTD::__has_construct_test(declval<_Alloc>(), 1396 declval<_Pointer>(), 1397 declval<_Args>()...)), 1398 true_type>::value> 1399{ 1400}; 1401 1402template <class _Alloc, class _Pointer> 1403auto 1404__has_destroy_test(_Alloc&& __a, _Pointer&& __p) 1405 -> decltype(__a.destroy(__p), true_type()); 1406 1407template <class _Alloc, class _Pointer> 1408auto 1409__has_destroy_test(const _Alloc& __a, _Pointer&& __p) 1410 -> false_type; 1411 1412template <class _Alloc, class _Pointer> 1413struct __has_destroy 1414 : integral_constant<bool, 1415 is_same< 1416 decltype(_VSTD::__has_destroy_test(declval<_Alloc>(), 1417 declval<_Pointer>())), 1418 true_type>::value> 1419{ 1420}; 1421 1422template <class _Alloc> 1423auto 1424__has_max_size_test(_Alloc&& __a) 1425 -> decltype(__a.max_size(), true_type()); 1426 1427template <class _Alloc> 1428auto 1429__has_max_size_test(const volatile _Alloc& __a) 1430 -> false_type; 1431 1432template <class _Alloc> 1433struct __has_max_size 1434 : integral_constant<bool, 1435 is_same< 1436 decltype(_VSTD::__has_max_size_test(declval<_Alloc&>())), 1437 true_type>::value> 1438{ 1439}; 1440 1441template <class _Alloc> 1442auto 1443__has_select_on_container_copy_construction_test(_Alloc&& __a) 1444 -> decltype(__a.select_on_container_copy_construction(), true_type()); 1445 1446template <class _Alloc> 1447auto 1448__has_select_on_container_copy_construction_test(const volatile _Alloc& __a) 1449 -> false_type; 1450 1451template <class _Alloc> 1452struct __has_select_on_container_copy_construction 1453 : integral_constant<bool, 1454 is_same< 1455 decltype(_VSTD::__has_select_on_container_copy_construction_test(declval<_Alloc&>())), 1456 true_type>::value> 1457{ 1458}; 1459 1460#else // _LIBCPP_CXX03_LANG 1461 1462template <class _Alloc, class _Pointer, class _Tp, class = void> 1463struct __has_construct : std::false_type {}; 1464 1465template <class _Alloc, class _Pointer, class _Tp> 1466struct __has_construct<_Alloc, _Pointer, _Tp, typename __void_t< 1467 decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Pointer>(), _VSTD::declval<_Tp>())) 1468>::type> : std::true_type {}; 1469 1470template <class _Alloc, class _Pointer, class = void> 1471struct __has_destroy : false_type {}; 1472 1473template <class _Alloc, class _Pointer> 1474struct __has_destroy<_Alloc, _Pointer, typename __void_t< 1475 decltype(_VSTD::declval<_Alloc>().destroy(_VSTD::declval<_Pointer>())) 1476>::type> : std::true_type {}; 1477 1478template <class _Alloc> 1479struct __has_max_size 1480 : true_type 1481{ 1482}; 1483 1484template <class _Alloc> 1485struct __has_select_on_container_copy_construction 1486 : false_type 1487{ 1488}; 1489 1490#endif // _LIBCPP_CXX03_LANG 1491 1492template <class _Alloc, class _Ptr, bool = __has_difference_type<_Alloc>::value> 1493struct __alloc_traits_difference_type 1494{ 1495 typedef typename pointer_traits<_Ptr>::difference_type type; 1496}; 1497 1498template <class _Alloc, class _Ptr> 1499struct __alloc_traits_difference_type<_Alloc, _Ptr, true> 1500{ 1501 typedef typename _Alloc::difference_type type; 1502}; 1503 1504template <class _Tp> 1505struct __is_default_allocator : false_type {}; 1506 1507template <class _Tp> 1508struct __is_default_allocator<_VSTD::allocator<_Tp> > : true_type {}; 1509 1510template <class _Alloc> 1511struct _LIBCPP_TEMPLATE_VIS allocator_traits 1512{ 1513 typedef _Alloc allocator_type; 1514 typedef typename allocator_type::value_type value_type; 1515 1516 typedef typename __pointer_type<value_type, allocator_type>::type pointer; 1517 typedef typename __const_pointer<value_type, pointer, allocator_type>::type const_pointer; 1518 typedef typename __void_pointer<pointer, allocator_type>::type void_pointer; 1519 typedef typename __const_void_pointer<pointer, allocator_type>::type const_void_pointer; 1520 1521 typedef typename __alloc_traits_difference_type<allocator_type, pointer>::type difference_type; 1522 typedef typename __size_type<allocator_type, difference_type>::type size_type; 1523 1524 typedef typename __propagate_on_container_copy_assignment<allocator_type>::type 1525 propagate_on_container_copy_assignment; 1526 typedef typename __propagate_on_container_move_assignment<allocator_type>::type 1527 propagate_on_container_move_assignment; 1528 typedef typename __propagate_on_container_swap<allocator_type>::type 1529 propagate_on_container_swap; 1530 typedef typename __is_always_equal<allocator_type>::type 1531 is_always_equal; 1532 1533#ifndef _LIBCPP_CXX03_LANG 1534 template <class _Tp> using rebind_alloc = 1535 typename __allocator_traits_rebind<allocator_type, _Tp>::type; 1536 template <class _Tp> using rebind_traits = allocator_traits<rebind_alloc<_Tp>>; 1537#else // _LIBCPP_CXX03_LANG 1538 template <class _Tp> struct rebind_alloc 1539 {typedef typename __allocator_traits_rebind<allocator_type, _Tp>::type other;}; 1540 template <class _Tp> struct rebind_traits 1541 {typedef allocator_traits<typename rebind_alloc<_Tp>::other> other;}; 1542#endif // _LIBCPP_CXX03_LANG 1543 1544 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1545 static pointer allocate(allocator_type& __a, size_type __n) 1546 {return __a.allocate(__n);} 1547 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1548 static pointer allocate(allocator_type& __a, size_type __n, const_void_pointer __hint) 1549 {return __allocate(__a, __n, __hint, 1550 __has_allocate_hint<allocator_type, size_type, const_void_pointer>());} 1551 1552 _LIBCPP_INLINE_VISIBILITY 1553 static void deallocate(allocator_type& __a, pointer __p, size_type __n) _NOEXCEPT 1554 {__a.deallocate(__p, __n);} 1555 1556#ifndef _LIBCPP_HAS_NO_VARIADICS 1557 template <class _Tp, class... _Args> 1558 _LIBCPP_INLINE_VISIBILITY 1559 static void construct(allocator_type& __a, _Tp* __p, _Args&&... __args) 1560 {__construct(__has_construct<allocator_type, _Tp*, _Args...>(), 1561 __a, __p, _VSTD::forward<_Args>(__args)...);} 1562#else // _LIBCPP_HAS_NO_VARIADICS 1563 template <class _Tp> 1564 _LIBCPP_INLINE_VISIBILITY 1565 static void construct(allocator_type&, _Tp* __p) 1566 { 1567 ::new ((void*)__p) _Tp(); 1568 } 1569 template <class _Tp, class _A0> 1570 _LIBCPP_INLINE_VISIBILITY 1571 static void construct(allocator_type& __a, _Tp* __p, const _A0& __a0) 1572 { 1573 __construct(__has_construct<allocator_type, _Tp*, const _A0&>(), 1574 __a, __p, __a0); 1575 } 1576 template <class _Tp, class _A0, class _A1> 1577 _LIBCPP_INLINE_VISIBILITY 1578 static void construct(allocator_type&, _Tp* __p, const _A0& __a0, 1579 const _A1& __a1) 1580 { 1581 ::new ((void*)__p) _Tp(__a0, __a1); 1582 } 1583 template <class _Tp, class _A0, class _A1, class _A2> 1584 _LIBCPP_INLINE_VISIBILITY 1585 static void construct(allocator_type&, _Tp* __p, const _A0& __a0, 1586 const _A1& __a1, const _A2& __a2) 1587 { 1588 ::new ((void*)__p) _Tp(__a0, __a1, __a2); 1589 } 1590#endif // _LIBCPP_HAS_NO_VARIADICS 1591 1592 template <class _Tp> 1593 _LIBCPP_INLINE_VISIBILITY 1594 static void destroy(allocator_type& __a, _Tp* __p) 1595 {__destroy(__has_destroy<allocator_type, _Tp*>(), __a, __p);} 1596 1597 _LIBCPP_INLINE_VISIBILITY 1598 static size_type max_size(const allocator_type& __a) _NOEXCEPT 1599 {return __max_size(__has_max_size<const allocator_type>(), __a);} 1600 1601 _LIBCPP_INLINE_VISIBILITY 1602 static allocator_type 1603 select_on_container_copy_construction(const allocator_type& __a) 1604 {return __select_on_container_copy_construction( 1605 __has_select_on_container_copy_construction<const allocator_type>(), 1606 __a);} 1607 1608 template <class _Ptr> 1609 _LIBCPP_INLINE_VISIBILITY 1610 static 1611 void 1612 __construct_forward(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) 1613 { 1614 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1615 construct(__a, _VSTD::__to_raw_pointer(__begin2), _VSTD::move_if_noexcept(*__begin1)); 1616 } 1617 1618 template <class _Tp> 1619 _LIBCPP_INLINE_VISIBILITY 1620 static 1621 typename enable_if 1622 < 1623 (__is_default_allocator<allocator_type>::value 1624 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1625 is_trivially_move_constructible<_Tp>::value, 1626 void 1627 >::type 1628 __construct_forward(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) 1629 { 1630 ptrdiff_t _Np = __end1 - __begin1; 1631 if (_Np > 0) 1632 { 1633 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); 1634 __begin2 += _Np; 1635 } 1636 } 1637 1638 template <class _Iter, class _Ptr> 1639 _LIBCPP_INLINE_VISIBILITY 1640 static 1641 void 1642 __construct_range_forward(allocator_type& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) 1643 { 1644 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1645 construct(__a, _VSTD::__to_raw_pointer(__begin2), *__begin1); 1646 } 1647 1648 template <class _SourceTp, class _DestTp, 1649 class _RawSourceTp = typename remove_const<_SourceTp>::type, 1650 class _RawDestTp = typename remove_const<_DestTp>::type> 1651 _LIBCPP_INLINE_VISIBILITY 1652 static 1653 typename enable_if 1654 < 1655 is_trivially_move_constructible<_DestTp>::value && 1656 is_same<_RawSourceTp, _RawDestTp>::value && 1657 (__is_default_allocator<allocator_type>::value || 1658 !__has_construct<allocator_type, _DestTp*, _SourceTp&>::value), 1659 void 1660 >::type 1661 __construct_range_forward(allocator_type&, _SourceTp* __begin1, _SourceTp* __end1, _DestTp*& __begin2) 1662 { 1663 ptrdiff_t _Np = __end1 - __begin1; 1664 if (_Np > 0) 1665 { 1666 _VSTD::memcpy(const_cast<_RawDestTp*>(__begin2), __begin1, _Np * sizeof(_DestTp)); 1667 __begin2 += _Np; 1668 } 1669 } 1670 1671 template <class _Ptr> 1672 _LIBCPP_INLINE_VISIBILITY 1673 static 1674 void 1675 __construct_backward(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) 1676 { 1677 while (__end1 != __begin1) 1678 { 1679 construct(__a, _VSTD::__to_raw_pointer(__end2-1), _VSTD::move_if_noexcept(*--__end1)); 1680 --__end2; 1681 } 1682 } 1683 1684 template <class _Tp> 1685 _LIBCPP_INLINE_VISIBILITY 1686 static 1687 typename enable_if 1688 < 1689 (__is_default_allocator<allocator_type>::value 1690 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1691 is_trivially_move_constructible<_Tp>::value, 1692 void 1693 >::type 1694 __construct_backward(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) 1695 { 1696 ptrdiff_t _Np = __end1 - __begin1; 1697 __end2 -= _Np; 1698 if (_Np > 0) 1699 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); 1700 } 1701 1702private: 1703 1704 _LIBCPP_INLINE_VISIBILITY 1705 static pointer __allocate(allocator_type& __a, size_type __n, 1706 const_void_pointer __hint, true_type) 1707 {return __a.allocate(__n, __hint);} 1708 _LIBCPP_INLINE_VISIBILITY 1709 static pointer __allocate(allocator_type& __a, size_type __n, 1710 const_void_pointer, false_type) 1711 {return __a.allocate(__n);} 1712 1713#ifndef _LIBCPP_HAS_NO_VARIADICS 1714 template <class _Tp, class... _Args> 1715 _LIBCPP_INLINE_VISIBILITY 1716 static void __construct(true_type, allocator_type& __a, _Tp* __p, _Args&&... __args) 1717 {__a.construct(__p, _VSTD::forward<_Args>(__args)...);} 1718 template <class _Tp, class... _Args> 1719 _LIBCPP_INLINE_VISIBILITY 1720 static void __construct(false_type, allocator_type&, _Tp* __p, _Args&&... __args) 1721 { 1722 ::new ((void*)__p) _Tp(_VSTD::forward<_Args>(__args)...); 1723 } 1724#else // _LIBCPP_HAS_NO_VARIADICS 1725 template <class _Tp, class _A0> 1726 _LIBCPP_INLINE_VISIBILITY 1727 static void __construct(true_type, allocator_type& __a, _Tp* __p, 1728 const _A0& __a0) 1729 {__a.construct(__p, __a0);} 1730 template <class _Tp, class _A0> 1731 _LIBCPP_INLINE_VISIBILITY 1732 static void __construct(false_type, allocator_type&, _Tp* __p, 1733 const _A0& __a0) 1734 { 1735 ::new ((void*)__p) _Tp(__a0); 1736 } 1737#endif // _LIBCPP_HAS_NO_VARIADICS 1738 1739 template <class _Tp> 1740 _LIBCPP_INLINE_VISIBILITY 1741 static void __destroy(true_type, allocator_type& __a, _Tp* __p) 1742 {__a.destroy(__p);} 1743 template <class _Tp> 1744 _LIBCPP_INLINE_VISIBILITY 1745 static void __destroy(false_type, allocator_type&, _Tp* __p) 1746 { 1747 __p->~_Tp(); 1748 } 1749 1750 _LIBCPP_INLINE_VISIBILITY 1751 static size_type __max_size(true_type, const allocator_type& __a) _NOEXCEPT 1752 {return __a.max_size();} 1753 _LIBCPP_INLINE_VISIBILITY 1754 static size_type __max_size(false_type, const allocator_type&) _NOEXCEPT 1755 {return numeric_limits<size_type>::max() / sizeof(value_type);} 1756 1757 _LIBCPP_INLINE_VISIBILITY 1758 static allocator_type 1759 __select_on_container_copy_construction(true_type, const allocator_type& __a) 1760 {return __a.select_on_container_copy_construction();} 1761 _LIBCPP_INLINE_VISIBILITY 1762 static allocator_type 1763 __select_on_container_copy_construction(false_type, const allocator_type& __a) 1764 {return __a;} 1765}; 1766 1767template <class _Traits, class _Tp> 1768struct __rebind_alloc_helper 1769{ 1770#ifndef _LIBCPP_CXX03_LANG 1771 typedef typename _Traits::template rebind_alloc<_Tp> type; 1772#else 1773 typedef typename _Traits::template rebind_alloc<_Tp>::other type; 1774#endif 1775}; 1776 1777// allocator 1778 1779template <class _Tp> 1780class _LIBCPP_TEMPLATE_VIS allocator 1781{ 1782public: 1783 typedef size_t size_type; 1784 typedef ptrdiff_t difference_type; 1785 typedef _Tp* pointer; 1786 typedef const _Tp* const_pointer; 1787 typedef _Tp& reference; 1788 typedef const _Tp& const_reference; 1789 typedef _Tp value_type; 1790 1791 typedef true_type propagate_on_container_move_assignment; 1792 typedef true_type is_always_equal; 1793 1794 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 1795 1796 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1797 allocator() _NOEXCEPT {} 1798 1799 template <class _Up> 1800 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1801 allocator(const allocator<_Up>&) _NOEXCEPT {} 1802 1803 _LIBCPP_INLINE_VISIBILITY pointer address(reference __x) const _NOEXCEPT 1804 {return _VSTD::addressof(__x);} 1805 _LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const _NOEXCEPT 1806 {return _VSTD::addressof(__x);} 1807 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1808 pointer allocate(size_type __n, allocator<void>::const_pointer = 0) 1809 { 1810 if (__n > max_size()) 1811 __throw_length_error("allocator<T>::allocate(size_t n)" 1812 " 'n' exceeds maximum supported size"); 1813 return static_cast<pointer>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1814 } 1815 _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type __n) _NOEXCEPT 1816 {_VSTD::__libcpp_deallocate((void*)__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));} 1817 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1818 {return size_type(~0) / sizeof(_Tp);} 1819#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1820 template <class _Up, class... _Args> 1821 _LIBCPP_INLINE_VISIBILITY 1822 void 1823 construct(_Up* __p, _Args&&... __args) 1824 { 1825 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1826 } 1827#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1828 _LIBCPP_INLINE_VISIBILITY 1829 void 1830 construct(pointer __p) 1831 { 1832 ::new((void*)__p) _Tp(); 1833 } 1834# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1835 1836 template <class _A0> 1837 _LIBCPP_INLINE_VISIBILITY 1838 void 1839 construct(pointer __p, _A0& __a0) 1840 { 1841 ::new((void*)__p) _Tp(__a0); 1842 } 1843 template <class _A0> 1844 _LIBCPP_INLINE_VISIBILITY 1845 void 1846 construct(pointer __p, const _A0& __a0) 1847 { 1848 ::new((void*)__p) _Tp(__a0); 1849 } 1850# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1851 template <class _A0, class _A1> 1852 _LIBCPP_INLINE_VISIBILITY 1853 void 1854 construct(pointer __p, _A0& __a0, _A1& __a1) 1855 { 1856 ::new((void*)__p) _Tp(__a0, __a1); 1857 } 1858 template <class _A0, class _A1> 1859 _LIBCPP_INLINE_VISIBILITY 1860 void 1861 construct(pointer __p, const _A0& __a0, _A1& __a1) 1862 { 1863 ::new((void*)__p) _Tp(__a0, __a1); 1864 } 1865 template <class _A0, class _A1> 1866 _LIBCPP_INLINE_VISIBILITY 1867 void 1868 construct(pointer __p, _A0& __a0, const _A1& __a1) 1869 { 1870 ::new((void*)__p) _Tp(__a0, __a1); 1871 } 1872 template <class _A0, class _A1> 1873 _LIBCPP_INLINE_VISIBILITY 1874 void 1875 construct(pointer __p, const _A0& __a0, const _A1& __a1) 1876 { 1877 ::new((void*)__p) _Tp(__a0, __a1); 1878 } 1879#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1880 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1881}; 1882 1883template <class _Tp> 1884class _LIBCPP_TEMPLATE_VIS allocator<const _Tp> 1885{ 1886public: 1887 typedef size_t size_type; 1888 typedef ptrdiff_t difference_type; 1889 typedef const _Tp* pointer; 1890 typedef const _Tp* const_pointer; 1891 typedef const _Tp& reference; 1892 typedef const _Tp& const_reference; 1893 typedef const _Tp value_type; 1894 1895 typedef true_type propagate_on_container_move_assignment; 1896 typedef true_type is_always_equal; 1897 1898 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 1899 1900 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1901 allocator() _NOEXCEPT {} 1902 1903 template <class _Up> 1904 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1905 allocator(const allocator<_Up>&) _NOEXCEPT {} 1906 1907 _LIBCPP_INLINE_VISIBILITY const_pointer address(const_reference __x) const _NOEXCEPT 1908 {return _VSTD::addressof(__x);} 1909 _LIBCPP_INLINE_VISIBILITY pointer allocate(size_type __n, allocator<void>::const_pointer = 0) 1910 { 1911 if (__n > max_size()) 1912 __throw_length_error("allocator<const T>::allocate(size_t n)" 1913 " 'n' exceeds maximum supported size"); 1914 return static_cast<pointer>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1915 } 1916 _LIBCPP_INLINE_VISIBILITY void deallocate(pointer __p, size_type __n) _NOEXCEPT 1917 {_VSTD::__libcpp_deallocate((void*) const_cast<_Tp *>(__p), __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp));} 1918 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT 1919 {return size_type(~0) / sizeof(_Tp);} 1920#if !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1921 template <class _Up, class... _Args> 1922 _LIBCPP_INLINE_VISIBILITY 1923 void 1924 construct(_Up* __p, _Args&&... __args) 1925 { 1926 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1927 } 1928#else // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1929 _LIBCPP_INLINE_VISIBILITY 1930 void 1931 construct(pointer __p) 1932 { 1933 ::new((void*) const_cast<_Tp *>(__p)) _Tp(); 1934 } 1935# if defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1936 1937 template <class _A0> 1938 _LIBCPP_INLINE_VISIBILITY 1939 void 1940 construct(pointer __p, _A0& __a0) 1941 { 1942 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0); 1943 } 1944 template <class _A0> 1945 _LIBCPP_INLINE_VISIBILITY 1946 void 1947 construct(pointer __p, const _A0& __a0) 1948 { 1949 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0); 1950 } 1951# endif // defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) 1952 template <class _A0, class _A1> 1953 _LIBCPP_INLINE_VISIBILITY 1954 void 1955 construct(pointer __p, _A0& __a0, _A1& __a1) 1956 { 1957 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1958 } 1959 template <class _A0, class _A1> 1960 _LIBCPP_INLINE_VISIBILITY 1961 void 1962 construct(pointer __p, const _A0& __a0, _A1& __a1) 1963 { 1964 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1965 } 1966 template <class _A0, class _A1> 1967 _LIBCPP_INLINE_VISIBILITY 1968 void 1969 construct(pointer __p, _A0& __a0, const _A1& __a1) 1970 { 1971 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1972 } 1973 template <class _A0, class _A1> 1974 _LIBCPP_INLINE_VISIBILITY 1975 void 1976 construct(pointer __p, const _A0& __a0, const _A1& __a1) 1977 { 1978 ::new((void*) const_cast<_Tp *>(__p)) _Tp(__a0, __a1); 1979 } 1980#endif // !defined(_LIBCPP_HAS_NO_RVALUE_REFERENCES) && !defined(_LIBCPP_HAS_NO_VARIADICS) 1981 _LIBCPP_INLINE_VISIBILITY void destroy(pointer __p) {__p->~_Tp();} 1982}; 1983 1984template <class _Tp, class _Up> 1985inline _LIBCPP_INLINE_VISIBILITY 1986bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;} 1987 1988template <class _Tp, class _Up> 1989inline _LIBCPP_INLINE_VISIBILITY 1990bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;} 1991 1992template <class _OutputIterator, class _Tp> 1993class _LIBCPP_TEMPLATE_VIS raw_storage_iterator 1994 : public iterator<output_iterator_tag, 1995 _Tp, // purposefully not C++03 1996 ptrdiff_t, // purposefully not C++03 1997 _Tp*, // purposefully not C++03 1998 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03 1999{ 2000private: 2001 _OutputIterator __x_; 2002public: 2003 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {} 2004 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;} 2005 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element) 2006 {::new(_VSTD::addressof(*__x_)) _Tp(__element); return *this;} 2007#if _LIBCPP_STD_VER >= 14 2008 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element) 2009 {::new(_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;} 2010#endif 2011 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;} 2012 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int) 2013 {raw_storage_iterator __t(*this); ++__x_; return __t;} 2014#if _LIBCPP_STD_VER >= 14 2015 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; } 2016#endif 2017}; 2018 2019template <class _Tp> 2020_LIBCPP_NODISCARD_EXT _LIBCPP_NO_CFI 2021pair<_Tp*, ptrdiff_t> 2022get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT 2023{ 2024 pair<_Tp*, ptrdiff_t> __r(0, 0); 2025 const ptrdiff_t __m = (~ptrdiff_t(0) ^ 2026 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1))) 2027 / sizeof(_Tp); 2028 if (__n > __m) 2029 __n = __m; 2030 while (__n > 0) 2031 { 2032#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) 2033 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 2034 { 2035 std::align_val_t __al = 2036 std::align_val_t(std::alignment_of<_Tp>::value); 2037 __r.first = static_cast<_Tp*>(::operator new( 2038 __n * sizeof(_Tp), __al, nothrow)); 2039 } else { 2040 __r.first = static_cast<_Tp*>(::operator new( 2041 __n * sizeof(_Tp), nothrow)); 2042 } 2043#else 2044 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 2045 { 2046 // Since aligned operator new is unavailable, return an empty 2047 // buffer rather than one with invalid alignment. 2048 return __r; 2049 } 2050 2051 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow)); 2052#endif 2053 2054 if (__r.first) 2055 { 2056 __r.second = __n; 2057 break; 2058 } 2059 __n /= 2; 2060 } 2061 return __r; 2062} 2063 2064template <class _Tp> 2065inline _LIBCPP_INLINE_VISIBILITY 2066void return_temporary_buffer(_Tp* __p) _NOEXCEPT 2067{ 2068 _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp)); 2069} 2070 2071#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2072template <class _Tp> 2073struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref 2074{ 2075 _Tp* __ptr_; 2076}; 2077 2078template<class _Tp> 2079class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr 2080{ 2081private: 2082 _Tp* __ptr_; 2083public: 2084 typedef _Tp element_type; 2085 2086 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) throw() : __ptr_(__p) {} 2087 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) throw() : __ptr_(__p.release()) {} 2088 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) throw() 2089 : __ptr_(__p.release()) {} 2090 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) throw() 2091 {reset(__p.release()); return *this;} 2092 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) throw() 2093 {reset(__p.release()); return *this;} 2094 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) throw() 2095 {reset(__p.__ptr_); return *this;} 2096 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() throw() {delete __ptr_;} 2097 2098 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const throw() 2099 {return *__ptr_;} 2100 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const throw() {return __ptr_;} 2101 _LIBCPP_INLINE_VISIBILITY _Tp* get() const throw() {return __ptr_;} 2102 _LIBCPP_INLINE_VISIBILITY _Tp* release() throw() 2103 { 2104 _Tp* __t = __ptr_; 2105 __ptr_ = 0; 2106 return __t; 2107 } 2108 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) throw() 2109 { 2110 if (__ptr_ != __p) 2111 delete __ptr_; 2112 __ptr_ = __p; 2113 } 2114 2115 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) throw() : __ptr_(__p.__ptr_) {} 2116 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() throw() 2117 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 2118 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() throw() 2119 {return auto_ptr<_Up>(release());} 2120}; 2121 2122template <> 2123class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> 2124{ 2125public: 2126 typedef void element_type; 2127}; 2128#endif 2129 2130template <class _Tp, int _Idx, 2131 bool _CanBeEmptyBase = 2132 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value> 2133struct __compressed_pair_elem { 2134 typedef _Tp _ParamT; 2135 typedef _Tp& reference; 2136 typedef const _Tp& const_reference; 2137 2138#ifndef _LIBCPP_CXX03_LANG 2139 _LIBCPP_INLINE_VISIBILITY constexpr __compressed_pair_elem() : __value_() {} 2140 2141 template <class _Up, class = typename enable_if< 2142 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2143 >::type> 2144 _LIBCPP_INLINE_VISIBILITY 2145 constexpr explicit 2146 __compressed_pair_elem(_Up&& __u) 2147 : __value_(_VSTD::forward<_Up>(__u)) 2148 { 2149 } 2150 2151 template <class... _Args, size_t... _Indexes> 2152 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2153 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2154 __tuple_indices<_Indexes...>) 2155 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2156#else 2157 _LIBCPP_INLINE_VISIBILITY __compressed_pair_elem() : __value_() {} 2158 _LIBCPP_INLINE_VISIBILITY 2159 __compressed_pair_elem(_ParamT __p) : __value_(std::forward<_ParamT>(__p)) {} 2160#endif 2161 2162 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; } 2163 _LIBCPP_INLINE_VISIBILITY 2164 const_reference __get() const _NOEXCEPT { return __value_; } 2165 2166private: 2167 _Tp __value_; 2168}; 2169 2170template <class _Tp, int _Idx> 2171struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { 2172 typedef _Tp _ParamT; 2173 typedef _Tp& reference; 2174 typedef const _Tp& const_reference; 2175 typedef _Tp __value_type; 2176 2177#ifndef _LIBCPP_CXX03_LANG 2178 _LIBCPP_INLINE_VISIBILITY constexpr __compressed_pair_elem() = default; 2179 2180 template <class _Up, class = typename enable_if< 2181 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2182 >::type> 2183 _LIBCPP_INLINE_VISIBILITY 2184 constexpr explicit 2185 __compressed_pair_elem(_Up&& __u) 2186 : __value_type(_VSTD::forward<_Up>(__u)) 2187 {} 2188 2189 template <class... _Args, size_t... _Indexes> 2190 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2191 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2192 __tuple_indices<_Indexes...>) 2193 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2194#else 2195 _LIBCPP_INLINE_VISIBILITY __compressed_pair_elem() : __value_type() {} 2196 _LIBCPP_INLINE_VISIBILITY 2197 __compressed_pair_elem(_ParamT __p) 2198 : __value_type(std::forward<_ParamT>(__p)) {} 2199#endif 2200 2201 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; } 2202 _LIBCPP_INLINE_VISIBILITY 2203 const_reference __get() const _NOEXCEPT { return *this; } 2204}; 2205 2206// Tag used to construct the second element of the compressed pair. 2207struct __second_tag {}; 2208 2209template <class _T1, class _T2> 2210class __compressed_pair : private __compressed_pair_elem<_T1, 0>, 2211 private __compressed_pair_elem<_T2, 1> { 2212 typedef __compressed_pair_elem<_T1, 0> _Base1; 2213 typedef __compressed_pair_elem<_T2, 1> _Base2; 2214 2215 // NOTE: This static assert should never fire because __compressed_pair 2216 // is *almost never* used in a scenario where it's possible for T1 == T2. 2217 // (The exception is std::function where it is possible that the function 2218 // object and the allocator have the same type). 2219 static_assert((!is_same<_T1, _T2>::value), 2220 "__compressed_pair cannot be instantated when T1 and T2 are the same type; " 2221 "The current implementation is NOT ABI-compatible with the previous " 2222 "implementation for this configuration"); 2223 2224public: 2225#ifndef _LIBCPP_CXX03_LANG 2226 template <bool _Dummy = true, 2227 class = typename enable_if< 2228 __dependent_type<is_default_constructible<_T1>, _Dummy>::value && 2229 __dependent_type<is_default_constructible<_T2>, _Dummy>::value 2230 >::type 2231 > 2232 _LIBCPP_INLINE_VISIBILITY 2233 constexpr __compressed_pair() {} 2234 2235 template <class _Tp, typename enable_if<!is_same<typename decay<_Tp>::type, 2236 __compressed_pair>::value, 2237 bool>::type = true> 2238 _LIBCPP_INLINE_VISIBILITY constexpr explicit 2239 __compressed_pair(_Tp&& __t) 2240 : _Base1(std::forward<_Tp>(__t)), _Base2() {} 2241 2242 template <class _Tp> 2243 _LIBCPP_INLINE_VISIBILITY constexpr 2244 __compressed_pair(__second_tag, _Tp&& __t) 2245 : _Base1(), _Base2(std::forward<_Tp>(__t)) {} 2246 2247 template <class _U1, class _U2> 2248 _LIBCPP_INLINE_VISIBILITY constexpr 2249 __compressed_pair(_U1&& __t1, _U2&& __t2) 2250 : _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {} 2251 2252 template <class... _Args1, class... _Args2> 2253 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2254 __compressed_pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args, 2255 tuple<_Args2...> __second_args) 2256 : _Base1(__pc, _VSTD::move(__first_args), 2257 typename __make_tuple_indices<sizeof...(_Args1)>::type()), 2258 _Base2(__pc, _VSTD::move(__second_args), 2259 typename __make_tuple_indices<sizeof...(_Args2)>::type()) {} 2260 2261#else 2262 _LIBCPP_INLINE_VISIBILITY 2263 __compressed_pair() {} 2264 2265 _LIBCPP_INLINE_VISIBILITY explicit 2266 __compressed_pair(_T1 __t1) : _Base1(_VSTD::forward<_T1>(__t1)) {} 2267 2268 _LIBCPP_INLINE_VISIBILITY 2269 __compressed_pair(__second_tag, _T2 __t2) 2270 : _Base1(), _Base2(_VSTD::forward<_T2>(__t2)) {} 2271 2272 _LIBCPP_INLINE_VISIBILITY 2273 __compressed_pair(_T1 __t1, _T2 __t2) 2274 : _Base1(_VSTD::forward<_T1>(__t1)), _Base2(_VSTD::forward<_T2>(__t2)) {} 2275#endif 2276 2277 _LIBCPP_INLINE_VISIBILITY 2278 typename _Base1::reference first() _NOEXCEPT { 2279 return static_cast<_Base1&>(*this).__get(); 2280 } 2281 2282 _LIBCPP_INLINE_VISIBILITY 2283 typename _Base1::const_reference first() const _NOEXCEPT { 2284 return static_cast<_Base1 const&>(*this).__get(); 2285 } 2286 2287 _LIBCPP_INLINE_VISIBILITY 2288 typename _Base2::reference second() _NOEXCEPT { 2289 return static_cast<_Base2&>(*this).__get(); 2290 } 2291 2292 _LIBCPP_INLINE_VISIBILITY 2293 typename _Base2::const_reference second() const _NOEXCEPT { 2294 return static_cast<_Base2 const&>(*this).__get(); 2295 } 2296 2297 _LIBCPP_INLINE_VISIBILITY 2298 void swap(__compressed_pair& __x) 2299 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2300 __is_nothrow_swappable<_T2>::value) 2301 { 2302 using std::swap; 2303 swap(first(), __x.first()); 2304 swap(second(), __x.second()); 2305 } 2306}; 2307 2308template <class _T1, class _T2> 2309inline _LIBCPP_INLINE_VISIBILITY 2310void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) 2311 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2312 __is_nothrow_swappable<_T2>::value) { 2313 __x.swap(__y); 2314} 2315 2316// default_delete 2317 2318template <class _Tp> 2319struct _LIBCPP_TEMPLATE_VIS default_delete { 2320 static_assert(!is_function<_Tp>::value, 2321 "default_delete cannot be instantiated for function types"); 2322#ifndef _LIBCPP_CXX03_LANG 2323 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() noexcept = default; 2324#else 2325 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2326#endif 2327 template <class _Up> 2328 _LIBCPP_INLINE_VISIBILITY 2329 default_delete(const default_delete<_Up>&, 2330 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 2331 0) _NOEXCEPT {} 2332 2333 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 2334 static_assert(sizeof(_Tp) > 0, 2335 "default_delete can not delete incomplete type"); 2336 static_assert(!is_void<_Tp>::value, 2337 "default_delete can not delete incomplete type"); 2338 delete __ptr; 2339 } 2340}; 2341 2342template <class _Tp> 2343struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 2344private: 2345 template <class _Up> 2346 struct _EnableIfConvertible 2347 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 2348 2349public: 2350#ifndef _LIBCPP_CXX03_LANG 2351 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() noexcept = default; 2352#else 2353 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2354#endif 2355 2356 template <class _Up> 2357 _LIBCPP_INLINE_VISIBILITY 2358 default_delete(const default_delete<_Up[]>&, 2359 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 2360 2361 template <class _Up> 2362 _LIBCPP_INLINE_VISIBILITY 2363 typename _EnableIfConvertible<_Up>::type 2364 operator()(_Up* __ptr) const _NOEXCEPT { 2365 static_assert(sizeof(_Tp) > 0, 2366 "default_delete can not delete incomplete type"); 2367 static_assert(!is_void<_Tp>::value, 2368 "default_delete can not delete void type"); 2369 delete[] __ptr; 2370 } 2371}; 2372 2373 2374 2375#ifndef _LIBCPP_CXX03_LANG 2376template <class _Deleter> 2377struct __unique_ptr_deleter_sfinae { 2378 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 2379 typedef const _Deleter& __lval_ref_type; 2380 typedef _Deleter&& __good_rval_ref_type; 2381 typedef true_type __enable_rval_overload; 2382}; 2383 2384template <class _Deleter> 2385struct __unique_ptr_deleter_sfinae<_Deleter const&> { 2386 typedef const _Deleter& __lval_ref_type; 2387 typedef const _Deleter&& __bad_rval_ref_type; 2388 typedef false_type __enable_rval_overload; 2389}; 2390 2391template <class _Deleter> 2392struct __unique_ptr_deleter_sfinae<_Deleter&> { 2393 typedef _Deleter& __lval_ref_type; 2394 typedef _Deleter&& __bad_rval_ref_type; 2395 typedef false_type __enable_rval_overload; 2396}; 2397#endif // !defined(_LIBCPP_CXX03_LANG) 2398 2399template <class _Tp, class _Dp = default_delete<_Tp> > 2400class _LIBCPP_TEMPLATE_VIS unique_ptr { 2401public: 2402 typedef _Tp element_type; 2403 typedef _Dp deleter_type; 2404 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2405 2406 static_assert(!is_rvalue_reference<deleter_type>::value, 2407 "the specified deleter type cannot be an rvalue reference"); 2408 2409private: 2410 __compressed_pair<pointer, deleter_type> __ptr_; 2411 2412 struct __nat { int __for_bool_; }; 2413 2414#ifndef _LIBCPP_CXX03_LANG 2415 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2416 2417 template <bool _Dummy> 2418 using _LValRefType = 2419 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2420 2421 template <bool _Dummy> 2422 using _GoodRValRefType = 2423 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2424 2425 template <bool _Dummy> 2426 using _BadRValRefType = 2427 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2428 2429 template <bool _Dummy, class _Deleter = typename __dependent_type< 2430 __identity<deleter_type>, _Dummy>::type> 2431 using _EnableIfDeleterDefaultConstructible = 2432 typename enable_if<is_default_constructible<_Deleter>::value && 2433 !is_pointer<_Deleter>::value>::type; 2434 2435 template <class _ArgType> 2436 using _EnableIfDeleterConstructible = 2437 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2438 2439 template <class _UPtr, class _Up> 2440 using _EnableIfMoveConvertible = typename enable_if< 2441 is_convertible<typename _UPtr::pointer, pointer>::value && 2442 !is_array<_Up>::value 2443 >::type; 2444 2445 template <class _UDel> 2446 using _EnableIfDeleterConvertible = typename enable_if< 2447 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2448 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2449 >::type; 2450 2451 template <class _UDel> 2452 using _EnableIfDeleterAssignable = typename enable_if< 2453 is_assignable<_Dp&, _UDel&&>::value 2454 >::type; 2455 2456public: 2457 template <bool _Dummy = true, 2458 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2459 _LIBCPP_INLINE_VISIBILITY 2460 constexpr unique_ptr() noexcept : __ptr_(pointer()) {} 2461 2462 template <bool _Dummy = true, 2463 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2464 _LIBCPP_INLINE_VISIBILITY 2465 constexpr unique_ptr(nullptr_t) noexcept : __ptr_(pointer()) {} 2466 2467 template <bool _Dummy = true, 2468 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2469 _LIBCPP_INLINE_VISIBILITY 2470 explicit unique_ptr(pointer __p) noexcept : __ptr_(__p) {} 2471 2472 template <bool _Dummy = true, 2473 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>> 2474 _LIBCPP_INLINE_VISIBILITY 2475 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) noexcept 2476 : __ptr_(__p, __d) {} 2477 2478 template <bool _Dummy = true, 2479 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>> 2480 _LIBCPP_INLINE_VISIBILITY 2481 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) noexcept 2482 : __ptr_(__p, _VSTD::move(__d)) { 2483 static_assert(!is_reference<deleter_type>::value, 2484 "rvalue deleter bound to reference"); 2485 } 2486 2487 template <bool _Dummy = true, 2488 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy>>> 2489 _LIBCPP_INLINE_VISIBILITY 2490 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 2491 2492 _LIBCPP_INLINE_VISIBILITY 2493 unique_ptr(unique_ptr&& __u) noexcept 2494 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2495 } 2496 2497 template <class _Up, class _Ep, 2498 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2499 class = _EnableIfDeleterConvertible<_Ep> 2500 > 2501 _LIBCPP_INLINE_VISIBILITY 2502 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2503 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 2504 2505#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2506 template <class _Up> 2507 _LIBCPP_INLINE_VISIBILITY 2508 unique_ptr(auto_ptr<_Up>&& __p, 2509 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2510 is_same<_Dp, default_delete<_Tp>>::value, 2511 __nat>::type = __nat()) _NOEXCEPT 2512 : __ptr_(__p.release()) {} 2513#endif 2514 2515 _LIBCPP_INLINE_VISIBILITY 2516 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2517 reset(__u.release()); 2518 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2519 return *this; 2520 } 2521 2522 template <class _Up, class _Ep, 2523 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2524 class = _EnableIfDeleterAssignable<_Ep> 2525 > 2526 _LIBCPP_INLINE_VISIBILITY 2527 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2528 reset(__u.release()); 2529 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2530 return *this; 2531 } 2532 2533#else // _LIBCPP_CXX03_LANG 2534private: 2535 unique_ptr(unique_ptr&); 2536 template <class _Up, class _Ep> unique_ptr(unique_ptr<_Up, _Ep>&); 2537 2538 unique_ptr& operator=(unique_ptr&); 2539 template <class _Up, class _Ep> unique_ptr& operator=(unique_ptr<_Up, _Ep>&); 2540 2541public: 2542 _LIBCPP_INLINE_VISIBILITY 2543 unique_ptr() : __ptr_(pointer()) 2544 { 2545 static_assert(!is_pointer<deleter_type>::value, 2546 "unique_ptr constructed with null function pointer deleter"); 2547 static_assert(is_default_constructible<deleter_type>::value, 2548 "unique_ptr::deleter_type is not default constructible"); 2549 } 2550 _LIBCPP_INLINE_VISIBILITY 2551 unique_ptr(nullptr_t) : __ptr_(pointer()) 2552 { 2553 static_assert(!is_pointer<deleter_type>::value, 2554 "unique_ptr constructed with null function pointer deleter"); 2555 } 2556 _LIBCPP_INLINE_VISIBILITY 2557 explicit unique_ptr(pointer __p) 2558 : __ptr_(_VSTD::move(__p)) { 2559 static_assert(!is_pointer<deleter_type>::value, 2560 "unique_ptr constructed with null function pointer deleter"); 2561 } 2562 2563 _LIBCPP_INLINE_VISIBILITY 2564 operator __rv<unique_ptr>() { 2565 return __rv<unique_ptr>(*this); 2566 } 2567 2568 _LIBCPP_INLINE_VISIBILITY 2569 unique_ptr(__rv<unique_ptr> __u) 2570 : __ptr_(__u->release(), 2571 _VSTD::forward<deleter_type>(__u->get_deleter())) {} 2572 2573 template <class _Up, class _Ep> 2574 _LIBCPP_INLINE_VISIBILITY 2575 typename enable_if< 2576 !is_array<_Up>::value && 2577 is_convertible<typename unique_ptr<_Up, _Ep>::pointer, 2578 pointer>::value && 2579 is_assignable<deleter_type&, _Ep&>::value, 2580 unique_ptr&>::type 2581 operator=(unique_ptr<_Up, _Ep> __u) { 2582 reset(__u.release()); 2583 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2584 return *this; 2585 } 2586 2587 _LIBCPP_INLINE_VISIBILITY 2588 unique_ptr(pointer __p, deleter_type __d) 2589 : __ptr_(_VSTD::move(__p), _VSTD::move(__d)) {} 2590#endif // _LIBCPP_CXX03_LANG 2591 2592#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2593 template <class _Up> 2594 _LIBCPP_INLINE_VISIBILITY 2595 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2596 is_same<_Dp, default_delete<_Tp> >::value, 2597 unique_ptr&>::type 2598 operator=(auto_ptr<_Up> __p) { 2599 reset(__p.release()); 2600 return *this; 2601 } 2602#endif 2603 2604 _LIBCPP_INLINE_VISIBILITY 2605 ~unique_ptr() { reset(); } 2606 2607 _LIBCPP_INLINE_VISIBILITY 2608 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2609 reset(); 2610 return *this; 2611 } 2612 2613 _LIBCPP_INLINE_VISIBILITY 2614 typename add_lvalue_reference<_Tp>::type 2615 operator*() const { 2616 return *__ptr_.first(); 2617 } 2618 _LIBCPP_INLINE_VISIBILITY 2619 pointer operator->() const _NOEXCEPT { 2620 return __ptr_.first(); 2621 } 2622 _LIBCPP_INLINE_VISIBILITY 2623 pointer get() const _NOEXCEPT { 2624 return __ptr_.first(); 2625 } 2626 _LIBCPP_INLINE_VISIBILITY 2627 deleter_type& get_deleter() _NOEXCEPT { 2628 return __ptr_.second(); 2629 } 2630 _LIBCPP_INLINE_VISIBILITY 2631 const deleter_type& get_deleter() const _NOEXCEPT { 2632 return __ptr_.second(); 2633 } 2634 _LIBCPP_INLINE_VISIBILITY 2635 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2636 return __ptr_.first() != nullptr; 2637 } 2638 2639 _LIBCPP_INLINE_VISIBILITY 2640 pointer release() _NOEXCEPT { 2641 pointer __t = __ptr_.first(); 2642 __ptr_.first() = pointer(); 2643 return __t; 2644 } 2645 2646 _LIBCPP_INLINE_VISIBILITY 2647 void reset(pointer __p = pointer()) _NOEXCEPT { 2648 pointer __tmp = __ptr_.first(); 2649 __ptr_.first() = __p; 2650 if (__tmp) 2651 __ptr_.second()(__tmp); 2652 } 2653 2654 _LIBCPP_INLINE_VISIBILITY 2655 void swap(unique_ptr& __u) _NOEXCEPT { 2656 __ptr_.swap(__u.__ptr_); 2657 } 2658}; 2659 2660 2661template <class _Tp, class _Dp> 2662class _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 2663public: 2664 typedef _Tp element_type; 2665 typedef _Dp deleter_type; 2666 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2667 2668private: 2669 __compressed_pair<pointer, deleter_type> __ptr_; 2670 2671 template <class _From> 2672 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 2673 2674 template <class _FromElem> 2675 struct _CheckArrayPointerConversion<_FromElem*> 2676 : integral_constant<bool, 2677 is_same<_FromElem*, pointer>::value || 2678 (is_same<pointer, element_type*>::value && 2679 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 2680 > 2681 {}; 2682 2683#ifndef _LIBCPP_CXX03_LANG 2684 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2685 2686 template <bool _Dummy> 2687 using _LValRefType = 2688 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2689 2690 template <bool _Dummy> 2691 using _GoodRValRefType = 2692 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2693 2694 template <bool _Dummy> 2695 using _BadRValRefType = 2696 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2697 2698 template <bool _Dummy, class _Deleter = typename __dependent_type< 2699 __identity<deleter_type>, _Dummy>::type> 2700 using _EnableIfDeleterDefaultConstructible = 2701 typename enable_if<is_default_constructible<_Deleter>::value && 2702 !is_pointer<_Deleter>::value>::type; 2703 2704 template <class _ArgType> 2705 using _EnableIfDeleterConstructible = 2706 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2707 2708 template <class _Pp> 2709 using _EnableIfPointerConvertible = typename enable_if< 2710 _CheckArrayPointerConversion<_Pp>::value 2711 >::type; 2712 2713 template <class _UPtr, class _Up, 2714 class _ElemT = typename _UPtr::element_type> 2715 using _EnableIfMoveConvertible = typename enable_if< 2716 is_array<_Up>::value && 2717 is_same<pointer, element_type*>::value && 2718 is_same<typename _UPtr::pointer, _ElemT*>::value && 2719 is_convertible<_ElemT(*)[], element_type(*)[]>::value 2720 >::type; 2721 2722 template <class _UDel> 2723 using _EnableIfDeleterConvertible = typename enable_if< 2724 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2725 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2726 >::type; 2727 2728 template <class _UDel> 2729 using _EnableIfDeleterAssignable = typename enable_if< 2730 is_assignable<_Dp&, _UDel&&>::value 2731 >::type; 2732 2733public: 2734 template <bool _Dummy = true, 2735 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2736 _LIBCPP_INLINE_VISIBILITY 2737 constexpr unique_ptr() noexcept : __ptr_(pointer()) {} 2738 2739 template <bool _Dummy = true, 2740 class = _EnableIfDeleterDefaultConstructible<_Dummy>> 2741 _LIBCPP_INLINE_VISIBILITY 2742 constexpr unique_ptr(nullptr_t) noexcept : __ptr_(pointer()) {} 2743 2744 template <class _Pp, bool _Dummy = true, 2745 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 2746 class = _EnableIfPointerConvertible<_Pp>> 2747 _LIBCPP_INLINE_VISIBILITY 2748 explicit unique_ptr(_Pp __p) noexcept 2749 : __ptr_(__p) {} 2750 2751 template <class _Pp, bool _Dummy = true, 2752 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>, 2753 class = _EnableIfPointerConvertible<_Pp>> 2754 _LIBCPP_INLINE_VISIBILITY 2755 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) noexcept 2756 : __ptr_(__p, __d) {} 2757 2758 template <bool _Dummy = true, 2759 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy>>> 2760 _LIBCPP_INLINE_VISIBILITY 2761 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) noexcept 2762 : __ptr_(nullptr, __d) {} 2763 2764 template <class _Pp, bool _Dummy = true, 2765 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>, 2766 class = _EnableIfPointerConvertible<_Pp>> 2767 _LIBCPP_INLINE_VISIBILITY 2768 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) noexcept 2769 : __ptr_(__p, _VSTD::move(__d)) { 2770 static_assert(!is_reference<deleter_type>::value, 2771 "rvalue deleter bound to reference"); 2772 } 2773 2774 template <bool _Dummy = true, 2775 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy>>> 2776 _LIBCPP_INLINE_VISIBILITY 2777 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) noexcept 2778 : __ptr_(nullptr, _VSTD::move(__d)) { 2779 static_assert(!is_reference<deleter_type>::value, 2780 "rvalue deleter bound to reference"); 2781 } 2782 2783 template <class _Pp, bool _Dummy = true, 2784 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy>>, 2785 class = _EnableIfPointerConvertible<_Pp>> 2786 _LIBCPP_INLINE_VISIBILITY 2787 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 2788 2789 _LIBCPP_INLINE_VISIBILITY 2790 unique_ptr(unique_ptr&& __u) noexcept 2791 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2792 } 2793 2794 _LIBCPP_INLINE_VISIBILITY 2795 unique_ptr& operator=(unique_ptr&& __u) noexcept { 2796 reset(__u.release()); 2797 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2798 return *this; 2799 } 2800 2801 template <class _Up, class _Ep, 2802 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2803 class = _EnableIfDeleterConvertible<_Ep> 2804 > 2805 _LIBCPP_INLINE_VISIBILITY 2806 unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept 2807 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 2808 } 2809 2810 template <class _Up, class _Ep, 2811 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2812 class = _EnableIfDeleterAssignable<_Ep> 2813 > 2814 _LIBCPP_INLINE_VISIBILITY 2815 unique_ptr& 2816 operator=(unique_ptr<_Up, _Ep>&& __u) noexcept { 2817 reset(__u.release()); 2818 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2819 return *this; 2820 } 2821 2822#else // _LIBCPP_CXX03_LANG 2823private: 2824 template <class _Up> explicit unique_ptr(_Up); 2825 2826 unique_ptr(unique_ptr&); 2827 template <class _Up> unique_ptr(unique_ptr<_Up>&); 2828 2829 unique_ptr& operator=(unique_ptr&); 2830 template <class _Up> unique_ptr& operator=(unique_ptr<_Up>&); 2831 2832 template <class _Up> 2833 unique_ptr(_Up __u, 2834 typename conditional< 2835 is_reference<deleter_type>::value, deleter_type, 2836 typename add_lvalue_reference<const deleter_type>::type>::type, 2837 typename enable_if<is_convertible<_Up, pointer>::value, 2838 __nat>::type = __nat()); 2839public: 2840 _LIBCPP_INLINE_VISIBILITY 2841 unique_ptr() : __ptr_(pointer()) { 2842 static_assert(!is_pointer<deleter_type>::value, 2843 "unique_ptr constructed with null function pointer deleter"); 2844 } 2845 _LIBCPP_INLINE_VISIBILITY 2846 unique_ptr(nullptr_t) : __ptr_(pointer()) { 2847 static_assert(!is_pointer<deleter_type>::value, 2848 "unique_ptr constructed with null function pointer deleter"); 2849 } 2850 2851 _LIBCPP_INLINE_VISIBILITY 2852 explicit unique_ptr(pointer __p) : __ptr_(__p) { 2853 static_assert(!is_pointer<deleter_type>::value, 2854 "unique_ptr constructed with null function pointer deleter"); 2855 } 2856 2857 _LIBCPP_INLINE_VISIBILITY 2858 unique_ptr(pointer __p, deleter_type __d) 2859 : __ptr_(__p, _VSTD::forward<deleter_type>(__d)) {} 2860 2861 _LIBCPP_INLINE_VISIBILITY 2862 unique_ptr(nullptr_t, deleter_type __d) 2863 : __ptr_(pointer(), _VSTD::forward<deleter_type>(__d)) {} 2864 2865 _LIBCPP_INLINE_VISIBILITY 2866 operator __rv<unique_ptr>() { 2867 return __rv<unique_ptr>(*this); 2868 } 2869 2870 _LIBCPP_INLINE_VISIBILITY 2871 unique_ptr(__rv<unique_ptr> __u) 2872 : __ptr_(__u->release(), 2873 _VSTD::forward<deleter_type>(__u->get_deleter())) {} 2874 2875 _LIBCPP_INLINE_VISIBILITY 2876 unique_ptr& operator=(__rv<unique_ptr> __u) { 2877 reset(__u->release()); 2878 __ptr_.second() = _VSTD::forward<deleter_type>(__u->get_deleter()); 2879 return *this; 2880 } 2881 2882#endif // _LIBCPP_CXX03_LANG 2883 2884public: 2885 _LIBCPP_INLINE_VISIBILITY 2886 ~unique_ptr() { reset(); } 2887 2888 _LIBCPP_INLINE_VISIBILITY 2889 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2890 reset(); 2891 return *this; 2892 } 2893 2894 _LIBCPP_INLINE_VISIBILITY 2895 typename add_lvalue_reference<_Tp>::type 2896 operator[](size_t __i) const { 2897 return __ptr_.first()[__i]; 2898 } 2899 _LIBCPP_INLINE_VISIBILITY 2900 pointer get() const _NOEXCEPT { 2901 return __ptr_.first(); 2902 } 2903 2904 _LIBCPP_INLINE_VISIBILITY 2905 deleter_type& get_deleter() _NOEXCEPT { 2906 return __ptr_.second(); 2907 } 2908 2909 _LIBCPP_INLINE_VISIBILITY 2910 const deleter_type& get_deleter() const _NOEXCEPT { 2911 return __ptr_.second(); 2912 } 2913 _LIBCPP_INLINE_VISIBILITY 2914 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2915 return __ptr_.first() != nullptr; 2916 } 2917 2918 _LIBCPP_INLINE_VISIBILITY 2919 pointer release() _NOEXCEPT { 2920 pointer __t = __ptr_.first(); 2921 __ptr_.first() = pointer(); 2922 return __t; 2923 } 2924 2925 template <class _Pp> 2926 _LIBCPP_INLINE_VISIBILITY 2927 typename enable_if< 2928 _CheckArrayPointerConversion<_Pp>::value 2929 >::type 2930 reset(_Pp __p) _NOEXCEPT { 2931 pointer __tmp = __ptr_.first(); 2932 __ptr_.first() = __p; 2933 if (__tmp) 2934 __ptr_.second()(__tmp); 2935 } 2936 2937 _LIBCPP_INLINE_VISIBILITY 2938 void reset(nullptr_t = nullptr) _NOEXCEPT { 2939 pointer __tmp = __ptr_.first(); 2940 __ptr_.first() = nullptr; 2941 if (__tmp) 2942 __ptr_.second()(__tmp); 2943 } 2944 2945 _LIBCPP_INLINE_VISIBILITY 2946 void swap(unique_ptr& __u) _NOEXCEPT { 2947 __ptr_.swap(__u.__ptr_); 2948 } 2949 2950}; 2951 2952template <class _Tp, class _Dp> 2953inline _LIBCPP_INLINE_VISIBILITY 2954typename enable_if< 2955 __is_swappable<_Dp>::value, 2956 void 2957>::type 2958swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 2959 2960template <class _T1, class _D1, class _T2, class _D2> 2961inline _LIBCPP_INLINE_VISIBILITY 2962bool 2963operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 2964 2965template <class _T1, class _D1, class _T2, class _D2> 2966inline _LIBCPP_INLINE_VISIBILITY 2967bool 2968operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 2969 2970template <class _T1, class _D1, class _T2, class _D2> 2971inline _LIBCPP_INLINE_VISIBILITY 2972bool 2973operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 2974{ 2975 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2976 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 2977 typedef typename common_type<_P1, _P2>::type _Vp; 2978 return less<_Vp>()(__x.get(), __y.get()); 2979} 2980 2981template <class _T1, class _D1, class _T2, class _D2> 2982inline _LIBCPP_INLINE_VISIBILITY 2983bool 2984operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 2985 2986template <class _T1, class _D1, class _T2, class _D2> 2987inline _LIBCPP_INLINE_VISIBILITY 2988bool 2989operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 2990 2991template <class _T1, class _D1, class _T2, class _D2> 2992inline _LIBCPP_INLINE_VISIBILITY 2993bool 2994operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 2995 2996template <class _T1, class _D1> 2997inline _LIBCPP_INLINE_VISIBILITY 2998bool 2999operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 3000{ 3001 return !__x; 3002} 3003 3004template <class _T1, class _D1> 3005inline _LIBCPP_INLINE_VISIBILITY 3006bool 3007operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 3008{ 3009 return !__x; 3010} 3011 3012template <class _T1, class _D1> 3013inline _LIBCPP_INLINE_VISIBILITY 3014bool 3015operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 3016{ 3017 return static_cast<bool>(__x); 3018} 3019 3020template <class _T1, class _D1> 3021inline _LIBCPP_INLINE_VISIBILITY 3022bool 3023operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 3024{ 3025 return static_cast<bool>(__x); 3026} 3027 3028template <class _T1, class _D1> 3029inline _LIBCPP_INLINE_VISIBILITY 3030bool 3031operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 3032{ 3033 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 3034 return less<_P1>()(__x.get(), nullptr); 3035} 3036 3037template <class _T1, class _D1> 3038inline _LIBCPP_INLINE_VISIBILITY 3039bool 3040operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3041{ 3042 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 3043 return less<_P1>()(nullptr, __x.get()); 3044} 3045 3046template <class _T1, class _D1> 3047inline _LIBCPP_INLINE_VISIBILITY 3048bool 3049operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 3050{ 3051 return nullptr < __x; 3052} 3053 3054template <class _T1, class _D1> 3055inline _LIBCPP_INLINE_VISIBILITY 3056bool 3057operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3058{ 3059 return __x < nullptr; 3060} 3061 3062template <class _T1, class _D1> 3063inline _LIBCPP_INLINE_VISIBILITY 3064bool 3065operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 3066{ 3067 return !(nullptr < __x); 3068} 3069 3070template <class _T1, class _D1> 3071inline _LIBCPP_INLINE_VISIBILITY 3072bool 3073operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3074{ 3075 return !(__x < nullptr); 3076} 3077 3078template <class _T1, class _D1> 3079inline _LIBCPP_INLINE_VISIBILITY 3080bool 3081operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 3082{ 3083 return !(__x < nullptr); 3084} 3085 3086template <class _T1, class _D1> 3087inline _LIBCPP_INLINE_VISIBILITY 3088bool 3089operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 3090{ 3091 return !(nullptr < __x); 3092} 3093 3094#ifdef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3095 3096template <class _Tp, class _Dp> 3097inline _LIBCPP_INLINE_VISIBILITY 3098unique_ptr<_Tp, _Dp> 3099move(unique_ptr<_Tp, _Dp>& __t) 3100{ 3101 return unique_ptr<_Tp, _Dp>(__rv<unique_ptr<_Tp, _Dp> >(__t)); 3102} 3103 3104#endif 3105 3106#if _LIBCPP_STD_VER > 11 3107 3108template<class _Tp> 3109struct __unique_if 3110{ 3111 typedef unique_ptr<_Tp> __unique_single; 3112}; 3113 3114template<class _Tp> 3115struct __unique_if<_Tp[]> 3116{ 3117 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 3118}; 3119 3120template<class _Tp, size_t _Np> 3121struct __unique_if<_Tp[_Np]> 3122{ 3123 typedef void __unique_array_known_bound; 3124}; 3125 3126template<class _Tp, class... _Args> 3127inline _LIBCPP_INLINE_VISIBILITY 3128typename __unique_if<_Tp>::__unique_single 3129make_unique(_Args&&... __args) 3130{ 3131 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 3132} 3133 3134template<class _Tp> 3135inline _LIBCPP_INLINE_VISIBILITY 3136typename __unique_if<_Tp>::__unique_array_unknown_bound 3137make_unique(size_t __n) 3138{ 3139 typedef typename remove_extent<_Tp>::type _Up; 3140 return unique_ptr<_Tp>(new _Up[__n]()); 3141} 3142 3143template<class _Tp, class... _Args> 3144 typename __unique_if<_Tp>::__unique_array_known_bound 3145 make_unique(_Args&&...) = delete; 3146 3147#endif // _LIBCPP_STD_VER > 11 3148 3149template <class _Tp, class _Dp> 3150#ifdef _LIBCPP_CXX03_LANG 3151struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 3152#else 3153struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 3154 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer>> 3155#endif 3156{ 3157 typedef unique_ptr<_Tp, _Dp> argument_type; 3158 typedef size_t result_type; 3159 _LIBCPP_INLINE_VISIBILITY 3160 result_type operator()(const argument_type& __ptr) const 3161 { 3162 typedef typename argument_type::pointer pointer; 3163 return hash<pointer>()(__ptr.get()); 3164 } 3165}; 3166 3167struct __destruct_n 3168{ 3169private: 3170 size_t __size_; 3171 3172 template <class _Tp> 3173 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 3174 {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();} 3175 3176 template <class _Tp> 3177 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 3178 {} 3179 3180 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 3181 {++__size_;} 3182 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 3183 {} 3184 3185 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 3186 {__size_ = __s;} 3187 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 3188 {} 3189public: 3190 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 3191 : __size_(__s) {} 3192 3193 template <class _Tp> 3194 _LIBCPP_INLINE_VISIBILITY void __incr(_Tp*) _NOEXCEPT 3195 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3196 3197 template <class _Tp> 3198 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 3199 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3200 3201 template <class _Tp> 3202 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 3203 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 3204}; 3205 3206template <class _Alloc> 3207class __allocator_destructor 3208{ 3209 typedef allocator_traits<_Alloc> __alloc_traits; 3210public: 3211 typedef typename __alloc_traits::pointer pointer; 3212 typedef typename __alloc_traits::size_type size_type; 3213private: 3214 _Alloc& __alloc_; 3215 size_type __s_; 3216public: 3217 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 3218 _NOEXCEPT 3219 : __alloc_(__a), __s_(__s) {} 3220 _LIBCPP_INLINE_VISIBILITY 3221 void operator()(pointer __p) _NOEXCEPT 3222 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 3223}; 3224 3225template <class _InputIterator, class _ForwardIterator> 3226_ForwardIterator 3227uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 3228{ 3229 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3230#ifndef _LIBCPP_NO_EXCEPTIONS 3231 _ForwardIterator __s = __r; 3232 try 3233 { 3234#endif 3235 for (; __f != __l; ++__f, (void) ++__r) 3236 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3237#ifndef _LIBCPP_NO_EXCEPTIONS 3238 } 3239 catch (...) 3240 { 3241 for (; __s != __r; ++__s) 3242 __s->~value_type(); 3243 throw; 3244 } 3245#endif 3246 return __r; 3247} 3248 3249template <class _InputIterator, class _Size, class _ForwardIterator> 3250_ForwardIterator 3251uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 3252{ 3253 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3254#ifndef _LIBCPP_NO_EXCEPTIONS 3255 _ForwardIterator __s = __r; 3256 try 3257 { 3258#endif 3259 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 3260 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 3261#ifndef _LIBCPP_NO_EXCEPTIONS 3262 } 3263 catch (...) 3264 { 3265 for (; __s != __r; ++__s) 3266 __s->~value_type(); 3267 throw; 3268 } 3269#endif 3270 return __r; 3271} 3272 3273template <class _ForwardIterator, class _Tp> 3274void 3275uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 3276{ 3277 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3278#ifndef _LIBCPP_NO_EXCEPTIONS 3279 _ForwardIterator __s = __f; 3280 try 3281 { 3282#endif 3283 for (; __f != __l; ++__f) 3284 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3285#ifndef _LIBCPP_NO_EXCEPTIONS 3286 } 3287 catch (...) 3288 { 3289 for (; __s != __f; ++__s) 3290 __s->~value_type(); 3291 throw; 3292 } 3293#endif 3294} 3295 3296template <class _ForwardIterator, class _Size, class _Tp> 3297_ForwardIterator 3298uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 3299{ 3300 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 3301#ifndef _LIBCPP_NO_EXCEPTIONS 3302 _ForwardIterator __s = __f; 3303 try 3304 { 3305#endif 3306 for (; __n > 0; ++__f, (void) --__n) 3307 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 3308#ifndef _LIBCPP_NO_EXCEPTIONS 3309 } 3310 catch (...) 3311 { 3312 for (; __s != __f; ++__s) 3313 __s->~value_type(); 3314 throw; 3315 } 3316#endif 3317 return __f; 3318} 3319 3320#if _LIBCPP_STD_VER > 14 3321 3322template <class _Tp> 3323inline _LIBCPP_INLINE_VISIBILITY 3324void destroy_at(_Tp* __loc) { 3325 _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); 3326 __loc->~_Tp(); 3327} 3328 3329template <class _ForwardIterator> 3330inline _LIBCPP_INLINE_VISIBILITY 3331void destroy(_ForwardIterator __first, _ForwardIterator __last) { 3332 for (; __first != __last; ++__first) 3333 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3334} 3335 3336template <class _ForwardIterator, class _Size> 3337inline _LIBCPP_INLINE_VISIBILITY 3338_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 3339 for (; __n > 0; (void)++__first, --__n) 3340 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3341 return __first; 3342} 3343 3344template <class _ForwardIterator> 3345inline _LIBCPP_INLINE_VISIBILITY 3346void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 3347 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3348 auto __idx = __first; 3349#ifndef _LIBCPP_NO_EXCEPTIONS 3350 try { 3351#endif 3352 for (; __idx != __last; ++__idx) 3353 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3354#ifndef _LIBCPP_NO_EXCEPTIONS 3355 } catch (...) { 3356 _VSTD::destroy(__first, __idx); 3357 throw; 3358 } 3359#endif 3360} 3361 3362template <class _ForwardIterator, class _Size> 3363inline _LIBCPP_INLINE_VISIBILITY 3364_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 3365 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3366 auto __idx = __first; 3367#ifndef _LIBCPP_NO_EXCEPTIONS 3368 try { 3369#endif 3370 for (; __n > 0; (void)++__idx, --__n) 3371 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3372 return __idx; 3373#ifndef _LIBCPP_NO_EXCEPTIONS 3374 } catch (...) { 3375 _VSTD::destroy(__first, __idx); 3376 throw; 3377 } 3378#endif 3379} 3380 3381 3382template <class _ForwardIterator> 3383inline _LIBCPP_INLINE_VISIBILITY 3384void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 3385 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3386 auto __idx = __first; 3387#ifndef _LIBCPP_NO_EXCEPTIONS 3388 try { 3389#endif 3390 for (; __idx != __last; ++__idx) 3391 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3392#ifndef _LIBCPP_NO_EXCEPTIONS 3393 } catch (...) { 3394 _VSTD::destroy(__first, __idx); 3395 throw; 3396 } 3397#endif 3398} 3399 3400template <class _ForwardIterator, class _Size> 3401inline _LIBCPP_INLINE_VISIBILITY 3402_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 3403 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3404 auto __idx = __first; 3405#ifndef _LIBCPP_NO_EXCEPTIONS 3406 try { 3407#endif 3408 for (; __n > 0; (void)++__idx, --__n) 3409 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3410 return __idx; 3411#ifndef _LIBCPP_NO_EXCEPTIONS 3412 } catch (...) { 3413 _VSTD::destroy(__first, __idx); 3414 throw; 3415 } 3416#endif 3417} 3418 3419 3420template <class _InputIt, class _ForwardIt> 3421inline _LIBCPP_INLINE_VISIBILITY 3422_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 3423 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3424 auto __idx = __first_res; 3425#ifndef _LIBCPP_NO_EXCEPTIONS 3426 try { 3427#endif 3428 for (; __first != __last; (void)++__idx, ++__first) 3429 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3430 return __idx; 3431#ifndef _LIBCPP_NO_EXCEPTIONS 3432 } catch (...) { 3433 _VSTD::destroy(__first_res, __idx); 3434 throw; 3435 } 3436#endif 3437} 3438 3439template <class _InputIt, class _Size, class _ForwardIt> 3440inline _LIBCPP_INLINE_VISIBILITY 3441pair<_InputIt, _ForwardIt> 3442uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 3443 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3444 auto __idx = __first_res; 3445#ifndef _LIBCPP_NO_EXCEPTIONS 3446 try { 3447#endif 3448 for (; __n > 0; ++__idx, (void)++__first, --__n) 3449 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3450 return {__first, __idx}; 3451#ifndef _LIBCPP_NO_EXCEPTIONS 3452 } catch (...) { 3453 _VSTD::destroy(__first_res, __idx); 3454 throw; 3455 } 3456#endif 3457} 3458 3459 3460#endif // _LIBCPP_STD_VER > 14 3461 3462// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 3463// should be sufficient for thread safety. 3464// See https://bugs.llvm.org/show_bug.cgi?id=22803 3465#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 3466 && defined(__ATOMIC_RELAXED) \ 3467 && defined(__ATOMIC_ACQ_REL) 3468# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3469#elif defined(_LIBCPP_COMPILER_GCC) 3470# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3471#endif 3472 3473template <class _Tp> 3474inline _LIBCPP_INLINE_VISIBILITY _Tp 3475__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 3476{ 3477#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3478 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 3479#else 3480 return __t += 1; 3481#endif 3482} 3483 3484template <class _Tp> 3485inline _LIBCPP_INLINE_VISIBILITY _Tp 3486__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 3487{ 3488#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3489 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 3490#else 3491 return __t -= 1; 3492#endif 3493} 3494 3495class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 3496 : public std::exception 3497{ 3498public: 3499 virtual ~bad_weak_ptr() _NOEXCEPT; 3500 virtual const char* what() const _NOEXCEPT; 3501}; 3502 3503_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY 3504void __throw_bad_weak_ptr() 3505{ 3506#ifndef _LIBCPP_NO_EXCEPTIONS 3507 throw bad_weak_ptr(); 3508#else 3509 _VSTD::abort(); 3510#endif 3511} 3512 3513template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 3514 3515class _LIBCPP_TYPE_VIS __shared_count 3516{ 3517 __shared_count(const __shared_count&); 3518 __shared_count& operator=(const __shared_count&); 3519 3520protected: 3521 long __shared_owners_; 3522 virtual ~__shared_count(); 3523private: 3524 virtual void __on_zero_shared() _NOEXCEPT = 0; 3525 3526public: 3527 _LIBCPP_INLINE_VISIBILITY 3528 explicit __shared_count(long __refs = 0) _NOEXCEPT 3529 : __shared_owners_(__refs) {} 3530 3531#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3532 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3533 void __add_shared() _NOEXCEPT; 3534 bool __release_shared() _NOEXCEPT; 3535#else 3536 _LIBCPP_INLINE_VISIBILITY 3537 void __add_shared() _NOEXCEPT { 3538 __libcpp_atomic_refcount_increment(__shared_owners_); 3539 } 3540 _LIBCPP_INLINE_VISIBILITY 3541 bool __release_shared() _NOEXCEPT { 3542 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 3543 __on_zero_shared(); 3544 return true; 3545 } 3546 return false; 3547 } 3548#endif 3549 _LIBCPP_INLINE_VISIBILITY 3550 long use_count() const _NOEXCEPT { 3551 return __libcpp_relaxed_load(&__shared_owners_) + 1; 3552 } 3553}; 3554 3555class _LIBCPP_TYPE_VIS __shared_weak_count 3556 : private __shared_count 3557{ 3558 long __shared_weak_owners_; 3559 3560public: 3561 _LIBCPP_INLINE_VISIBILITY 3562 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 3563 : __shared_count(__refs), 3564 __shared_weak_owners_(__refs) {} 3565protected: 3566 virtual ~__shared_weak_count(); 3567 3568public: 3569#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3570 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3571 void __add_shared() _NOEXCEPT; 3572 void __add_weak() _NOEXCEPT; 3573 void __release_shared() _NOEXCEPT; 3574#else 3575 _LIBCPP_INLINE_VISIBILITY 3576 void __add_shared() _NOEXCEPT { 3577 __shared_count::__add_shared(); 3578 } 3579 _LIBCPP_INLINE_VISIBILITY 3580 void __add_weak() _NOEXCEPT { 3581 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 3582 } 3583 _LIBCPP_INLINE_VISIBILITY 3584 void __release_shared() _NOEXCEPT { 3585 if (__shared_count::__release_shared()) 3586 __release_weak(); 3587 } 3588#endif 3589 void __release_weak() _NOEXCEPT; 3590 _LIBCPP_INLINE_VISIBILITY 3591 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 3592 __shared_weak_count* lock() _NOEXCEPT; 3593 3594 // Define the function out only if we build static libc++ without RTTI. 3595 // Otherwise we may break clients who need to compile their projects with 3596 // -fno-rtti and yet link against a libc++.dylib compiled 3597 // without -fno-rtti. 3598#if !defined(_LIBCPP_NO_RTTI) || !defined(_LIBCPP_BUILD_STATIC) 3599 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3600#endif 3601private: 3602 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 3603}; 3604 3605template <class _Tp, class _Dp, class _Alloc> 3606class __shared_ptr_pointer 3607 : public __shared_weak_count 3608{ 3609 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 3610public: 3611 _LIBCPP_INLINE_VISIBILITY 3612 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 3613 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 3614 3615#ifndef _LIBCPP_NO_RTTI 3616 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3617#endif 3618 3619private: 3620 virtual void __on_zero_shared() _NOEXCEPT; 3621 virtual void __on_zero_shared_weak() _NOEXCEPT; 3622}; 3623 3624#ifndef _LIBCPP_NO_RTTI 3625 3626template <class _Tp, class _Dp, class _Alloc> 3627const void* 3628__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 3629{ 3630 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 3631} 3632 3633#endif // _LIBCPP_NO_RTTI 3634 3635template <class _Tp, class _Dp, class _Alloc> 3636void 3637__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 3638{ 3639 __data_.first().second()(__data_.first().first()); 3640 __data_.first().second().~_Dp(); 3641} 3642 3643template <class _Tp, class _Dp, class _Alloc> 3644void 3645__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3646{ 3647 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 3648 typedef allocator_traits<_Al> _ATraits; 3649 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3650 3651 _Al __a(__data_.second()); 3652 __data_.second().~_Alloc(); 3653 __a.deallocate(_PTraits::pointer_to(*this), 1); 3654} 3655 3656template <class _Tp, class _Alloc> 3657class __shared_ptr_emplace 3658 : public __shared_weak_count 3659{ 3660 __compressed_pair<_Alloc, _Tp> __data_; 3661public: 3662#ifndef _LIBCPP_HAS_NO_VARIADICS 3663 3664 _LIBCPP_INLINE_VISIBILITY 3665 __shared_ptr_emplace(_Alloc __a) 3666 : __data_(_VSTD::move(__a)) {} 3667 3668 template <class ..._Args> 3669 _LIBCPP_INLINE_VISIBILITY 3670 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 3671 : __data_(piecewise_construct, _VSTD::forward_as_tuple(__a), 3672 _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {} 3673 3674#else // _LIBCPP_HAS_NO_VARIADICS 3675 3676 _LIBCPP_INLINE_VISIBILITY 3677 __shared_ptr_emplace(_Alloc __a) 3678 : __data_(__a) {} 3679 3680 template <class _A0> 3681 _LIBCPP_INLINE_VISIBILITY 3682 __shared_ptr_emplace(_Alloc __a, _A0& __a0) 3683 : __data_(__a, _Tp(__a0)) {} 3684 3685 template <class _A0, class _A1> 3686 _LIBCPP_INLINE_VISIBILITY 3687 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1) 3688 : __data_(__a, _Tp(__a0, __a1)) {} 3689 3690 template <class _A0, class _A1, class _A2> 3691 _LIBCPP_INLINE_VISIBILITY 3692 __shared_ptr_emplace(_Alloc __a, _A0& __a0, _A1& __a1, _A2& __a2) 3693 : __data_(__a, _Tp(__a0, __a1, __a2)) {} 3694 3695#endif // _LIBCPP_HAS_NO_VARIADICS 3696 3697private: 3698 virtual void __on_zero_shared() _NOEXCEPT; 3699 virtual void __on_zero_shared_weak() _NOEXCEPT; 3700public: 3701 _LIBCPP_INLINE_VISIBILITY 3702 _Tp* get() _NOEXCEPT {return _VSTD::addressof(__data_.second());} 3703}; 3704 3705template <class _Tp, class _Alloc> 3706void 3707__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared() _NOEXCEPT 3708{ 3709 __data_.second().~_Tp(); 3710} 3711 3712template <class _Tp, class _Alloc> 3713void 3714__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3715{ 3716 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type _Al; 3717 typedef allocator_traits<_Al> _ATraits; 3718 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3719 _Al __a(__data_.first()); 3720 __data_.first().~_Alloc(); 3721 __a.deallocate(_PTraits::pointer_to(*this), 1); 3722} 3723 3724struct __shared_ptr_dummy_rebind_allocator_type; 3725template <> 3726class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type> 3727{ 3728public: 3729 template <class _Other> 3730 struct rebind 3731 { 3732 typedef allocator<_Other> other; 3733 }; 3734}; 3735 3736template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 3737 3738template<class _Tp> 3739class _LIBCPP_TEMPLATE_VIS shared_ptr 3740{ 3741public: 3742 typedef _Tp element_type; 3743 3744#if _LIBCPP_STD_VER > 14 3745 typedef weak_ptr<_Tp> weak_type; 3746#endif 3747private: 3748 element_type* __ptr_; 3749 __shared_weak_count* __cntrl_; 3750 3751 struct __nat {int __for_bool_;}; 3752public: 3753 _LIBCPP_INLINE_VISIBILITY 3754 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 3755 _LIBCPP_INLINE_VISIBILITY 3756 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 3757 template<class _Yp> 3758 explicit shared_ptr(_Yp* __p, 3759 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3760 template<class _Yp, class _Dp> 3761 shared_ptr(_Yp* __p, _Dp __d, 3762 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3763 template<class _Yp, class _Dp, class _Alloc> 3764 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3765 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3766 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 3767 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 3768 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 3769 _LIBCPP_INLINE_VISIBILITY 3770 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 3771 template<class _Yp> 3772 _LIBCPP_INLINE_VISIBILITY 3773 shared_ptr(const shared_ptr<_Yp>& __r, 3774 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()) 3775 _NOEXCEPT; 3776#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3777 _LIBCPP_INLINE_VISIBILITY 3778 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 3779 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 3780 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()) 3781 _NOEXCEPT; 3782#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3783 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 3784 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 3785#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3786#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3787 template<class _Yp> 3788 shared_ptr(auto_ptr<_Yp>&& __r, 3789 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3790#else 3791 template<class _Yp> 3792 shared_ptr(auto_ptr<_Yp> __r, 3793 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3794#endif 3795#endif 3796#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3797 template <class _Yp, class _Dp> 3798 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3799 typename enable_if 3800 < 3801 !is_lvalue_reference<_Dp>::value && 3802 !is_array<_Yp>::value && 3803 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3804 __nat 3805 >::type = __nat()); 3806 template <class _Yp, class _Dp> 3807 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3808 typename enable_if 3809 < 3810 is_lvalue_reference<_Dp>::value && 3811 !is_array<_Yp>::value && 3812 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3813 __nat 3814 >::type = __nat()); 3815#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3816 template <class _Yp, class _Dp> 3817 shared_ptr(unique_ptr<_Yp, _Dp>, 3818 typename enable_if 3819 < 3820 !is_lvalue_reference<_Dp>::value && 3821 !is_array<_Yp>::value && 3822 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3823 __nat 3824 >::type = __nat()); 3825 template <class _Yp, class _Dp> 3826 shared_ptr(unique_ptr<_Yp, _Dp>, 3827 typename enable_if 3828 < 3829 is_lvalue_reference<_Dp>::value && 3830 !is_array<_Yp>::value && 3831 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3832 __nat 3833 >::type = __nat()); 3834#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3835 3836 ~shared_ptr(); 3837 3838 _LIBCPP_INLINE_VISIBILITY 3839 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 3840 template<class _Yp> 3841 typename enable_if 3842 < 3843 is_convertible<_Yp*, element_type*>::value, 3844 shared_ptr& 3845 >::type 3846 _LIBCPP_INLINE_VISIBILITY 3847 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 3848#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3849 _LIBCPP_INLINE_VISIBILITY 3850 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 3851 template<class _Yp> 3852 typename enable_if 3853 < 3854 is_convertible<_Yp*, element_type*>::value, 3855 shared_ptr<_Tp>& 3856 >::type 3857 _LIBCPP_INLINE_VISIBILITY 3858 operator=(shared_ptr<_Yp>&& __r); 3859#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3860 template<class _Yp> 3861 _LIBCPP_INLINE_VISIBILITY 3862 typename enable_if 3863 < 3864 !is_array<_Yp>::value && 3865 is_convertible<_Yp*, element_type*>::value, 3866 shared_ptr 3867 >::type& 3868 operator=(auto_ptr<_Yp>&& __r); 3869#endif 3870#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3871#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3872 template<class _Yp> 3873 _LIBCPP_INLINE_VISIBILITY 3874 typename enable_if 3875 < 3876 !is_array<_Yp>::value && 3877 is_convertible<_Yp*, element_type*>::value, 3878 shared_ptr& 3879 >::type 3880 operator=(auto_ptr<_Yp> __r); 3881#endif 3882#endif 3883 template <class _Yp, class _Dp> 3884 typename enable_if 3885 < 3886 !is_array<_Yp>::value && 3887 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3888 shared_ptr& 3889 >::type 3890#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 3891 _LIBCPP_INLINE_VISIBILITY 3892 operator=(unique_ptr<_Yp, _Dp>&& __r); 3893#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 3894 _LIBCPP_INLINE_VISIBILITY 3895 operator=(unique_ptr<_Yp, _Dp> __r); 3896#endif 3897 3898 _LIBCPP_INLINE_VISIBILITY 3899 void swap(shared_ptr& __r) _NOEXCEPT; 3900 _LIBCPP_INLINE_VISIBILITY 3901 void reset() _NOEXCEPT; 3902 template<class _Yp> 3903 typename enable_if 3904 < 3905 is_convertible<_Yp*, element_type*>::value, 3906 void 3907 >::type 3908 _LIBCPP_INLINE_VISIBILITY 3909 reset(_Yp* __p); 3910 template<class _Yp, class _Dp> 3911 typename enable_if 3912 < 3913 is_convertible<_Yp*, element_type*>::value, 3914 void 3915 >::type 3916 _LIBCPP_INLINE_VISIBILITY 3917 reset(_Yp* __p, _Dp __d); 3918 template<class _Yp, class _Dp, class _Alloc> 3919 typename enable_if 3920 < 3921 is_convertible<_Yp*, element_type*>::value, 3922 void 3923 >::type 3924 _LIBCPP_INLINE_VISIBILITY 3925 reset(_Yp* __p, _Dp __d, _Alloc __a); 3926 3927 _LIBCPP_INLINE_VISIBILITY 3928 element_type* get() const _NOEXCEPT {return __ptr_;} 3929 _LIBCPP_INLINE_VISIBILITY 3930 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 3931 {return *__ptr_;} 3932 _LIBCPP_INLINE_VISIBILITY 3933 element_type* operator->() const _NOEXCEPT {return __ptr_;} 3934 _LIBCPP_INLINE_VISIBILITY 3935 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 3936 _LIBCPP_INLINE_VISIBILITY 3937 bool unique() const _NOEXCEPT {return use_count() == 1;} 3938 _LIBCPP_INLINE_VISIBILITY 3939 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != 0;} 3940 template <class _Up> 3941 _LIBCPP_INLINE_VISIBILITY 3942 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 3943 {return __cntrl_ < __p.__cntrl_;} 3944 template <class _Up> 3945 _LIBCPP_INLINE_VISIBILITY 3946 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 3947 {return __cntrl_ < __p.__cntrl_;} 3948 _LIBCPP_INLINE_VISIBILITY 3949 bool 3950 __owner_equivalent(const shared_ptr& __p) const 3951 {return __cntrl_ == __p.__cntrl_;} 3952 3953#ifndef _LIBCPP_NO_RTTI 3954 template <class _Dp> 3955 _LIBCPP_INLINE_VISIBILITY 3956 _Dp* __get_deleter() const _NOEXCEPT 3957 {return static_cast<_Dp*>(__cntrl_ 3958 ? const_cast<void *>(__cntrl_->__get_deleter(typeid(_Dp))) 3959 : nullptr);} 3960#endif // _LIBCPP_NO_RTTI 3961 3962#ifndef _LIBCPP_HAS_NO_VARIADICS 3963 3964 template<class ..._Args> 3965 static 3966 shared_ptr<_Tp> 3967 make_shared(_Args&& ...__args); 3968 3969 template<class _Alloc, class ..._Args> 3970 static 3971 shared_ptr<_Tp> 3972 allocate_shared(const _Alloc& __a, _Args&& ...__args); 3973 3974#else // _LIBCPP_HAS_NO_VARIADICS 3975 3976 static shared_ptr<_Tp> make_shared(); 3977 3978 template<class _A0> 3979 static shared_ptr<_Tp> make_shared(_A0&); 3980 3981 template<class _A0, class _A1> 3982 static shared_ptr<_Tp> make_shared(_A0&, _A1&); 3983 3984 template<class _A0, class _A1, class _A2> 3985 static shared_ptr<_Tp> make_shared(_A0&, _A1&, _A2&); 3986 3987 template<class _Alloc> 3988 static shared_ptr<_Tp> 3989 allocate_shared(const _Alloc& __a); 3990 3991 template<class _Alloc, class _A0> 3992 static shared_ptr<_Tp> 3993 allocate_shared(const _Alloc& __a, _A0& __a0); 3994 3995 template<class _Alloc, class _A0, class _A1> 3996 static shared_ptr<_Tp> 3997 allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1); 3998 3999 template<class _Alloc, class _A0, class _A1, class _A2> 4000 static shared_ptr<_Tp> 4001 allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2); 4002 4003#endif // _LIBCPP_HAS_NO_VARIADICS 4004 4005private: 4006 template <class _Yp, bool = is_function<_Yp>::value> 4007 struct __shared_ptr_default_allocator 4008 { 4009 typedef allocator<_Yp> type; 4010 }; 4011 4012 template <class _Yp> 4013 struct __shared_ptr_default_allocator<_Yp, true> 4014 { 4015 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type; 4016 }; 4017 4018 template <class _Yp, class _OrigPtr> 4019 _LIBCPP_INLINE_VISIBILITY 4020 typename enable_if<is_convertible<_OrigPtr*, 4021 const enable_shared_from_this<_Yp>* 4022 >::value, 4023 void>::type 4024 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 4025 _OrigPtr* __ptr) _NOEXCEPT 4026 { 4027 typedef typename remove_cv<_Yp>::type _RawYp; 4028 if (__e && __e->__weak_this_.expired()) 4029 { 4030 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 4031 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 4032 } 4033 } 4034 4035 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {} 4036 4037 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 4038 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 4039}; 4040 4041 4042template<class _Tp> 4043inline 4044_LIBCPP_CONSTEXPR 4045shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 4046 : __ptr_(0), 4047 __cntrl_(0) 4048{ 4049} 4050 4051template<class _Tp> 4052inline 4053_LIBCPP_CONSTEXPR 4054shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 4055 : __ptr_(0), 4056 __cntrl_(0) 4057{ 4058} 4059 4060template<class _Tp> 4061template<class _Yp> 4062shared_ptr<_Tp>::shared_ptr(_Yp* __p, 4063 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4064 : __ptr_(__p) 4065{ 4066 unique_ptr<_Yp> __hold(__p); 4067 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4068 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, _AllocT > _CntrlBlk; 4069 __cntrl_ = new _CntrlBlk(__p, default_delete<_Yp>(), _AllocT()); 4070 __hold.release(); 4071 __enable_weak_this(__p, __p); 4072} 4073 4074template<class _Tp> 4075template<class _Yp, class _Dp> 4076shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 4077 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4078 : __ptr_(__p) 4079{ 4080#ifndef _LIBCPP_NO_EXCEPTIONS 4081 try 4082 { 4083#endif // _LIBCPP_NO_EXCEPTIONS 4084 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4085 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 4086 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 4087 __enable_weak_this(__p, __p); 4088#ifndef _LIBCPP_NO_EXCEPTIONS 4089 } 4090 catch (...) 4091 { 4092 __d(__p); 4093 throw; 4094 } 4095#endif // _LIBCPP_NO_EXCEPTIONS 4096} 4097 4098template<class _Tp> 4099template<class _Dp> 4100shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 4101 : __ptr_(0) 4102{ 4103#ifndef _LIBCPP_NO_EXCEPTIONS 4104 try 4105 { 4106#endif // _LIBCPP_NO_EXCEPTIONS 4107 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT; 4108 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk; 4109 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 4110#ifndef _LIBCPP_NO_EXCEPTIONS 4111 } 4112 catch (...) 4113 { 4114 __d(__p); 4115 throw; 4116 } 4117#endif // _LIBCPP_NO_EXCEPTIONS 4118} 4119 4120template<class _Tp> 4121template<class _Yp, class _Dp, class _Alloc> 4122shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 4123 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4124 : __ptr_(__p) 4125{ 4126#ifndef _LIBCPP_NO_EXCEPTIONS 4127 try 4128 { 4129#endif // _LIBCPP_NO_EXCEPTIONS 4130 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 4131 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4132 typedef __allocator_destructor<_A2> _D2; 4133 _A2 __a2(__a); 4134 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4135 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4136 _CntrlBlk(__p, __d, __a); 4137 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4138 __enable_weak_this(__p, __p); 4139#ifndef _LIBCPP_NO_EXCEPTIONS 4140 } 4141 catch (...) 4142 { 4143 __d(__p); 4144 throw; 4145 } 4146#endif // _LIBCPP_NO_EXCEPTIONS 4147} 4148 4149template<class _Tp> 4150template<class _Dp, class _Alloc> 4151shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 4152 : __ptr_(0) 4153{ 4154#ifndef _LIBCPP_NO_EXCEPTIONS 4155 try 4156 { 4157#endif // _LIBCPP_NO_EXCEPTIONS 4158 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 4159 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4160 typedef __allocator_destructor<_A2> _D2; 4161 _A2 __a2(__a); 4162 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4163 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4164 _CntrlBlk(__p, __d, __a); 4165 __cntrl_ = _VSTD::addressof(*__hold2.release()); 4166#ifndef _LIBCPP_NO_EXCEPTIONS 4167 } 4168 catch (...) 4169 { 4170 __d(__p); 4171 throw; 4172 } 4173#endif // _LIBCPP_NO_EXCEPTIONS 4174} 4175 4176template<class _Tp> 4177template<class _Yp> 4178inline 4179shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 4180 : __ptr_(__p), 4181 __cntrl_(__r.__cntrl_) 4182{ 4183 if (__cntrl_) 4184 __cntrl_->__add_shared(); 4185} 4186 4187template<class _Tp> 4188inline 4189shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 4190 : __ptr_(__r.__ptr_), 4191 __cntrl_(__r.__cntrl_) 4192{ 4193 if (__cntrl_) 4194 __cntrl_->__add_shared(); 4195} 4196 4197template<class _Tp> 4198template<class _Yp> 4199inline 4200shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 4201 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4202 _NOEXCEPT 4203 : __ptr_(__r.__ptr_), 4204 __cntrl_(__r.__cntrl_) 4205{ 4206 if (__cntrl_) 4207 __cntrl_->__add_shared(); 4208} 4209 4210#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4211 4212template<class _Tp> 4213inline 4214shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 4215 : __ptr_(__r.__ptr_), 4216 __cntrl_(__r.__cntrl_) 4217{ 4218 __r.__ptr_ = 0; 4219 __r.__cntrl_ = 0; 4220} 4221 4222template<class _Tp> 4223template<class _Yp> 4224inline 4225shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 4226 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4227 _NOEXCEPT 4228 : __ptr_(__r.__ptr_), 4229 __cntrl_(__r.__cntrl_) 4230{ 4231 __r.__ptr_ = 0; 4232 __r.__cntrl_ = 0; 4233} 4234 4235#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4236 4237#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4238template<class _Tp> 4239template<class _Yp> 4240#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4241shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 4242#else 4243shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp> __r, 4244#endif 4245 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4246 : __ptr_(__r.get()) 4247{ 4248 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 4249 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 4250 __enable_weak_this(__r.get(), __r.get()); 4251 __r.release(); 4252} 4253#endif 4254 4255template<class _Tp> 4256template <class _Yp, class _Dp> 4257#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4258shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4259#else 4260shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4261#endif 4262 typename enable_if 4263 < 4264 !is_lvalue_reference<_Dp>::value && 4265 !is_array<_Yp>::value && 4266 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4267 __nat 4268 >::type) 4269 : __ptr_(__r.get()) 4270{ 4271#if _LIBCPP_STD_VER > 11 4272 if (__ptr_ == nullptr) 4273 __cntrl_ = nullptr; 4274 else 4275#endif 4276 { 4277 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4278 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 4279 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT()); 4280 __enable_weak_this(__r.get(), __r.get()); 4281 } 4282 __r.release(); 4283} 4284 4285template<class _Tp> 4286template <class _Yp, class _Dp> 4287#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4288shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 4289#else 4290shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp> __r, 4291#endif 4292 typename enable_if 4293 < 4294 is_lvalue_reference<_Dp>::value && 4295 !is_array<_Yp>::value && 4296 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 4297 __nat 4298 >::type) 4299 : __ptr_(__r.get()) 4300{ 4301#if _LIBCPP_STD_VER > 11 4302 if (__ptr_ == nullptr) 4303 __cntrl_ = nullptr; 4304 else 4305#endif 4306 { 4307 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 4308 typedef __shared_ptr_pointer<_Yp*, 4309 reference_wrapper<typename remove_reference<_Dp>::type>, 4310 _AllocT > _CntrlBlk; 4311 __cntrl_ = new _CntrlBlk(__r.get(), ref(__r.get_deleter()), _AllocT()); 4312 __enable_weak_this(__r.get(), __r.get()); 4313 } 4314 __r.release(); 4315} 4316 4317#ifndef _LIBCPP_HAS_NO_VARIADICS 4318 4319template<class _Tp> 4320template<class ..._Args> 4321shared_ptr<_Tp> 4322shared_ptr<_Tp>::make_shared(_Args&& ...__args) 4323{ 4324 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in make_shared" ); 4325 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4326 typedef allocator<_CntrlBlk> _A2; 4327 typedef __allocator_destructor<_A2> _D2; 4328 _A2 __a2; 4329 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4330 ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...); 4331 shared_ptr<_Tp> __r; 4332 __r.__ptr_ = __hold2.get()->get(); 4333 __r.__cntrl_ = __hold2.release(); 4334 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4335 return __r; 4336} 4337 4338template<class _Tp> 4339template<class _Alloc, class ..._Args> 4340shared_ptr<_Tp> 4341shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _Args&& ...__args) 4342{ 4343 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in allocate_shared" ); 4344 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4345 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4346 typedef __allocator_destructor<_A2> _D2; 4347 _A2 __a2(__a); 4348 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4349 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4350 _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...); 4351 shared_ptr<_Tp> __r; 4352 __r.__ptr_ = __hold2.get()->get(); 4353 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4354 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4355 return __r; 4356} 4357 4358#else // _LIBCPP_HAS_NO_VARIADICS 4359 4360template<class _Tp> 4361shared_ptr<_Tp> 4362shared_ptr<_Tp>::make_shared() 4363{ 4364 static_assert((is_constructible<_Tp>::value), "Can't construct object in make_shared" ); 4365 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4366 typedef allocator<_CntrlBlk> _Alloc2; 4367 typedef __allocator_destructor<_Alloc2> _D2; 4368 _Alloc2 __alloc2; 4369 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4370 ::new(__hold2.get()) _CntrlBlk(__alloc2); 4371 shared_ptr<_Tp> __r; 4372 __r.__ptr_ = __hold2.get()->get(); 4373 __r.__cntrl_ = __hold2.release(); 4374 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4375 return __r; 4376} 4377 4378template<class _Tp> 4379template<class _A0> 4380shared_ptr<_Tp> 4381shared_ptr<_Tp>::make_shared(_A0& __a0) 4382{ 4383 static_assert((is_constructible<_Tp, _A0>::value), "Can't construct object in make_shared" ); 4384 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4385 typedef allocator<_CntrlBlk> _Alloc2; 4386 typedef __allocator_destructor<_Alloc2> _D2; 4387 _Alloc2 __alloc2; 4388 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4389 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0); 4390 shared_ptr<_Tp> __r; 4391 __r.__ptr_ = __hold2.get()->get(); 4392 __r.__cntrl_ = __hold2.release(); 4393 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4394 return __r; 4395} 4396 4397template<class _Tp> 4398template<class _A0, class _A1> 4399shared_ptr<_Tp> 4400shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1) 4401{ 4402 static_assert((is_constructible<_Tp, _A0, _A1>::value), "Can't construct object in make_shared" ); 4403 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4404 typedef allocator<_CntrlBlk> _Alloc2; 4405 typedef __allocator_destructor<_Alloc2> _D2; 4406 _Alloc2 __alloc2; 4407 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4408 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1); 4409 shared_ptr<_Tp> __r; 4410 __r.__ptr_ = __hold2.get()->get(); 4411 __r.__cntrl_ = __hold2.release(); 4412 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4413 return __r; 4414} 4415 4416template<class _Tp> 4417template<class _A0, class _A1, class _A2> 4418shared_ptr<_Tp> 4419shared_ptr<_Tp>::make_shared(_A0& __a0, _A1& __a1, _A2& __a2) 4420{ 4421 static_assert((is_constructible<_Tp, _A0, _A1, _A2>::value), "Can't construct object in make_shared" ); 4422 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4423 typedef allocator<_CntrlBlk> _Alloc2; 4424 typedef __allocator_destructor<_Alloc2> _D2; 4425 _Alloc2 __alloc2; 4426 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4427 ::new(__hold2.get()) _CntrlBlk(__alloc2, __a0, __a1, __a2); 4428 shared_ptr<_Tp> __r; 4429 __r.__ptr_ = __hold2.get()->get(); 4430 __r.__cntrl_ = __hold2.release(); 4431 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4432 return __r; 4433} 4434 4435template<class _Tp> 4436template<class _Alloc> 4437shared_ptr<_Tp> 4438shared_ptr<_Tp>::allocate_shared(const _Alloc& __a) 4439{ 4440 static_assert((is_constructible<_Tp>::value), "Can't construct object in allocate_shared" ); 4441 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4442 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4443 typedef __allocator_destructor<_Alloc2> _D2; 4444 _Alloc2 __alloc2(__a); 4445 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4446 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4447 _CntrlBlk(__a); 4448 shared_ptr<_Tp> __r; 4449 __r.__ptr_ = __hold2.get()->get(); 4450 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4451 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4452 return __r; 4453} 4454 4455template<class _Tp> 4456template<class _Alloc, class _A0> 4457shared_ptr<_Tp> 4458shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0) 4459{ 4460 static_assert((is_constructible<_Tp, _A0>::value), "Can't construct object in allocate_shared" ); 4461 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4462 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4463 typedef __allocator_destructor<_Alloc2> _D2; 4464 _Alloc2 __alloc2(__a); 4465 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4466 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4467 _CntrlBlk(__a, __a0); 4468 shared_ptr<_Tp> __r; 4469 __r.__ptr_ = __hold2.get()->get(); 4470 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4471 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4472 return __r; 4473} 4474 4475template<class _Tp> 4476template<class _Alloc, class _A0, class _A1> 4477shared_ptr<_Tp> 4478shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1) 4479{ 4480 static_assert((is_constructible<_Tp, _A0, _A1>::value), "Can't construct object in allocate_shared" ); 4481 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4482 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4483 typedef __allocator_destructor<_Alloc2> _D2; 4484 _Alloc2 __alloc2(__a); 4485 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4486 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4487 _CntrlBlk(__a, __a0, __a1); 4488 shared_ptr<_Tp> __r; 4489 __r.__ptr_ = __hold2.get()->get(); 4490 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4491 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4492 return __r; 4493} 4494 4495template<class _Tp> 4496template<class _Alloc, class _A0, class _A1, class _A2> 4497shared_ptr<_Tp> 4498shared_ptr<_Tp>::allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2) 4499{ 4500 static_assert((is_constructible<_Tp, _A0, _A1, _A2>::value), "Can't construct object in allocate_shared" ); 4501 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4502 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _Alloc2; 4503 typedef __allocator_destructor<_Alloc2> _D2; 4504 _Alloc2 __alloc2(__a); 4505 unique_ptr<_CntrlBlk, _D2> __hold2(__alloc2.allocate(1), _D2(__alloc2, 1)); 4506 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4507 _CntrlBlk(__a, __a0, __a1, __a2); 4508 shared_ptr<_Tp> __r; 4509 __r.__ptr_ = __hold2.get()->get(); 4510 __r.__cntrl_ = _VSTD::addressof(*__hold2.release()); 4511 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 4512 return __r; 4513} 4514 4515#endif // _LIBCPP_HAS_NO_VARIADICS 4516 4517template<class _Tp> 4518shared_ptr<_Tp>::~shared_ptr() 4519{ 4520 if (__cntrl_) 4521 __cntrl_->__release_shared(); 4522} 4523 4524template<class _Tp> 4525inline 4526shared_ptr<_Tp>& 4527shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 4528{ 4529 shared_ptr(__r).swap(*this); 4530 return *this; 4531} 4532 4533template<class _Tp> 4534template<class _Yp> 4535inline 4536typename enable_if 4537< 4538 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4539 shared_ptr<_Tp>& 4540>::type 4541shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 4542{ 4543 shared_ptr(__r).swap(*this); 4544 return *this; 4545} 4546 4547#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 4548 4549template<class _Tp> 4550inline 4551shared_ptr<_Tp>& 4552shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 4553{ 4554 shared_ptr(_VSTD::move(__r)).swap(*this); 4555 return *this; 4556} 4557 4558template<class _Tp> 4559template<class _Yp> 4560inline 4561typename enable_if 4562< 4563 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4564 shared_ptr<_Tp>& 4565>::type 4566shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 4567{ 4568 shared_ptr(_VSTD::move(__r)).swap(*this); 4569 return *this; 4570} 4571 4572#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4573template<class _Tp> 4574template<class _Yp> 4575inline 4576typename enable_if 4577< 4578 !is_array<_Yp>::value && 4579 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4580 shared_ptr<_Tp> 4581>::type& 4582shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 4583{ 4584 shared_ptr(_VSTD::move(__r)).swap(*this); 4585 return *this; 4586} 4587#endif 4588 4589template<class _Tp> 4590template <class _Yp, class _Dp> 4591inline 4592typename enable_if 4593< 4594 !is_array<_Yp>::value && 4595 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4596 typename shared_ptr<_Tp>::element_type*>::value, 4597 shared_ptr<_Tp>& 4598>::type 4599shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 4600{ 4601 shared_ptr(_VSTD::move(__r)).swap(*this); 4602 return *this; 4603} 4604 4605#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4606 4607#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 4608template<class _Tp> 4609template<class _Yp> 4610inline _LIBCPP_INLINE_VISIBILITY 4611typename enable_if 4612< 4613 !is_array<_Yp>::value && 4614 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4615 shared_ptr<_Tp>& 4616>::type 4617shared_ptr<_Tp>::operator=(auto_ptr<_Yp> __r) 4618{ 4619 shared_ptr(__r).swap(*this); 4620 return *this; 4621} 4622#endif 4623 4624template<class _Tp> 4625template <class _Yp, class _Dp> 4626inline _LIBCPP_INLINE_VISIBILITY 4627typename enable_if 4628< 4629 !is_array<_Yp>::value && 4630 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4631 typename shared_ptr<_Tp>::element_type*>::value, 4632 shared_ptr<_Tp>& 4633>::type 4634shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp> __r) 4635{ 4636 shared_ptr(_VSTD::move(__r)).swap(*this); 4637 return *this; 4638} 4639 4640#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 4641 4642template<class _Tp> 4643inline 4644void 4645shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 4646{ 4647 _VSTD::swap(__ptr_, __r.__ptr_); 4648 _VSTD::swap(__cntrl_, __r.__cntrl_); 4649} 4650 4651template<class _Tp> 4652inline 4653void 4654shared_ptr<_Tp>::reset() _NOEXCEPT 4655{ 4656 shared_ptr().swap(*this); 4657} 4658 4659template<class _Tp> 4660template<class _Yp> 4661inline 4662typename enable_if 4663< 4664 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4665 void 4666>::type 4667shared_ptr<_Tp>::reset(_Yp* __p) 4668{ 4669 shared_ptr(__p).swap(*this); 4670} 4671 4672template<class _Tp> 4673template<class _Yp, class _Dp> 4674inline 4675typename enable_if 4676< 4677 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4678 void 4679>::type 4680shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 4681{ 4682 shared_ptr(__p, __d).swap(*this); 4683} 4684 4685template<class _Tp> 4686template<class _Yp, class _Dp, class _Alloc> 4687inline 4688typename enable_if 4689< 4690 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 4691 void 4692>::type 4693shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 4694{ 4695 shared_ptr(__p, __d, __a).swap(*this); 4696} 4697 4698#ifndef _LIBCPP_HAS_NO_VARIADICS 4699 4700template<class _Tp, class ..._Args> 4701inline _LIBCPP_INLINE_VISIBILITY 4702typename enable_if 4703< 4704 !is_array<_Tp>::value, 4705 shared_ptr<_Tp> 4706>::type 4707make_shared(_Args&& ...__args) 4708{ 4709 return shared_ptr<_Tp>::make_shared(_VSTD::forward<_Args>(__args)...); 4710} 4711 4712template<class _Tp, class _Alloc, class ..._Args> 4713inline _LIBCPP_INLINE_VISIBILITY 4714typename enable_if 4715< 4716 !is_array<_Tp>::value, 4717 shared_ptr<_Tp> 4718>::type 4719allocate_shared(const _Alloc& __a, _Args&& ...__args) 4720{ 4721 return shared_ptr<_Tp>::allocate_shared(__a, _VSTD::forward<_Args>(__args)...); 4722} 4723 4724#else // _LIBCPP_HAS_NO_VARIADICS 4725 4726template<class _Tp> 4727inline _LIBCPP_INLINE_VISIBILITY 4728shared_ptr<_Tp> 4729make_shared() 4730{ 4731 return shared_ptr<_Tp>::make_shared(); 4732} 4733 4734template<class _Tp, class _A0> 4735inline _LIBCPP_INLINE_VISIBILITY 4736shared_ptr<_Tp> 4737make_shared(_A0& __a0) 4738{ 4739 return shared_ptr<_Tp>::make_shared(__a0); 4740} 4741 4742template<class _Tp, class _A0, class _A1> 4743inline _LIBCPP_INLINE_VISIBILITY 4744shared_ptr<_Tp> 4745make_shared(_A0& __a0, _A1& __a1) 4746{ 4747 return shared_ptr<_Tp>::make_shared(__a0, __a1); 4748} 4749 4750template<class _Tp, class _A0, class _A1, class _A2> 4751inline _LIBCPP_INLINE_VISIBILITY 4752shared_ptr<_Tp> 4753make_shared(_A0& __a0, _A1& __a1, _A2& __a2) 4754{ 4755 return shared_ptr<_Tp>::make_shared(__a0, __a1, __a2); 4756} 4757 4758template<class _Tp, class _Alloc> 4759inline _LIBCPP_INLINE_VISIBILITY 4760shared_ptr<_Tp> 4761allocate_shared(const _Alloc& __a) 4762{ 4763 return shared_ptr<_Tp>::allocate_shared(__a); 4764} 4765 4766template<class _Tp, class _Alloc, class _A0> 4767inline _LIBCPP_INLINE_VISIBILITY 4768shared_ptr<_Tp> 4769allocate_shared(const _Alloc& __a, _A0& __a0) 4770{ 4771 return shared_ptr<_Tp>::allocate_shared(__a, __a0); 4772} 4773 4774template<class _Tp, class _Alloc, class _A0, class _A1> 4775inline _LIBCPP_INLINE_VISIBILITY 4776shared_ptr<_Tp> 4777allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1) 4778{ 4779 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1); 4780} 4781 4782template<class _Tp, class _Alloc, class _A0, class _A1, class _A2> 4783inline _LIBCPP_INLINE_VISIBILITY 4784shared_ptr<_Tp> 4785allocate_shared(const _Alloc& __a, _A0& __a0, _A1& __a1, _A2& __a2) 4786{ 4787 return shared_ptr<_Tp>::allocate_shared(__a, __a0, __a1, __a2); 4788} 4789 4790#endif // _LIBCPP_HAS_NO_VARIADICS 4791 4792template<class _Tp, class _Up> 4793inline _LIBCPP_INLINE_VISIBILITY 4794bool 4795operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4796{ 4797 return __x.get() == __y.get(); 4798} 4799 4800template<class _Tp, class _Up> 4801inline _LIBCPP_INLINE_VISIBILITY 4802bool 4803operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4804{ 4805 return !(__x == __y); 4806} 4807 4808template<class _Tp, class _Up> 4809inline _LIBCPP_INLINE_VISIBILITY 4810bool 4811operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4812{ 4813#if _LIBCPP_STD_VER <= 11 4814 typedef typename common_type<_Tp*, _Up*>::type _Vp; 4815 return less<_Vp>()(__x.get(), __y.get()); 4816#else 4817 return less<>()(__x.get(), __y.get()); 4818#endif 4819 4820} 4821 4822template<class _Tp, class _Up> 4823inline _LIBCPP_INLINE_VISIBILITY 4824bool 4825operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4826{ 4827 return __y < __x; 4828} 4829 4830template<class _Tp, class _Up> 4831inline _LIBCPP_INLINE_VISIBILITY 4832bool 4833operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4834{ 4835 return !(__y < __x); 4836} 4837 4838template<class _Tp, class _Up> 4839inline _LIBCPP_INLINE_VISIBILITY 4840bool 4841operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4842{ 4843 return !(__x < __y); 4844} 4845 4846template<class _Tp> 4847inline _LIBCPP_INLINE_VISIBILITY 4848bool 4849operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4850{ 4851 return !__x; 4852} 4853 4854template<class _Tp> 4855inline _LIBCPP_INLINE_VISIBILITY 4856bool 4857operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4858{ 4859 return !__x; 4860} 4861 4862template<class _Tp> 4863inline _LIBCPP_INLINE_VISIBILITY 4864bool 4865operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4866{ 4867 return static_cast<bool>(__x); 4868} 4869 4870template<class _Tp> 4871inline _LIBCPP_INLINE_VISIBILITY 4872bool 4873operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4874{ 4875 return static_cast<bool>(__x); 4876} 4877 4878template<class _Tp> 4879inline _LIBCPP_INLINE_VISIBILITY 4880bool 4881operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4882{ 4883 return less<_Tp*>()(__x.get(), nullptr); 4884} 4885 4886template<class _Tp> 4887inline _LIBCPP_INLINE_VISIBILITY 4888bool 4889operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4890{ 4891 return less<_Tp*>()(nullptr, __x.get()); 4892} 4893 4894template<class _Tp> 4895inline _LIBCPP_INLINE_VISIBILITY 4896bool 4897operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4898{ 4899 return nullptr < __x; 4900} 4901 4902template<class _Tp> 4903inline _LIBCPP_INLINE_VISIBILITY 4904bool 4905operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4906{ 4907 return __x < nullptr; 4908} 4909 4910template<class _Tp> 4911inline _LIBCPP_INLINE_VISIBILITY 4912bool 4913operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4914{ 4915 return !(nullptr < __x); 4916} 4917 4918template<class _Tp> 4919inline _LIBCPP_INLINE_VISIBILITY 4920bool 4921operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4922{ 4923 return !(__x < nullptr); 4924} 4925 4926template<class _Tp> 4927inline _LIBCPP_INLINE_VISIBILITY 4928bool 4929operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4930{ 4931 return !(__x < nullptr); 4932} 4933 4934template<class _Tp> 4935inline _LIBCPP_INLINE_VISIBILITY 4936bool 4937operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4938{ 4939 return !(nullptr < __x); 4940} 4941 4942template<class _Tp> 4943inline _LIBCPP_INLINE_VISIBILITY 4944void 4945swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 4946{ 4947 __x.swap(__y); 4948} 4949 4950template<class _Tp, class _Up> 4951inline _LIBCPP_INLINE_VISIBILITY 4952typename enable_if 4953< 4954 !is_array<_Tp>::value && !is_array<_Up>::value, 4955 shared_ptr<_Tp> 4956>::type 4957static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4958{ 4959 return shared_ptr<_Tp>(__r, static_cast<_Tp*>(__r.get())); 4960} 4961 4962template<class _Tp, class _Up> 4963inline _LIBCPP_INLINE_VISIBILITY 4964typename enable_if 4965< 4966 !is_array<_Tp>::value && !is_array<_Up>::value, 4967 shared_ptr<_Tp> 4968>::type 4969dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4970{ 4971 _Tp* __p = dynamic_cast<_Tp*>(__r.get()); 4972 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 4973} 4974 4975template<class _Tp, class _Up> 4976typename enable_if 4977< 4978 is_array<_Tp>::value == is_array<_Up>::value, 4979 shared_ptr<_Tp> 4980>::type 4981const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4982{ 4983 typedef typename remove_extent<_Tp>::type _RTp; 4984 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 4985} 4986 4987#ifndef _LIBCPP_NO_RTTI 4988 4989template<class _Dp, class _Tp> 4990inline _LIBCPP_INLINE_VISIBILITY 4991_Dp* 4992get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 4993{ 4994 return __p.template __get_deleter<_Dp>(); 4995} 4996 4997#endif // _LIBCPP_NO_RTTI 4998 4999template<class _Tp> 5000class _LIBCPP_TEMPLATE_VIS weak_ptr 5001{ 5002public: 5003 typedef _Tp element_type; 5004private: 5005 element_type* __ptr_; 5006 __shared_weak_count* __cntrl_; 5007 5008public: 5009 _LIBCPP_INLINE_VISIBILITY 5010 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 5011 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 5012 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 5013 _NOEXCEPT; 5014 _LIBCPP_INLINE_VISIBILITY 5015 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 5016 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 5017 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 5018 _NOEXCEPT; 5019 5020#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 5021 _LIBCPP_INLINE_VISIBILITY 5022 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 5023 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 5024 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 5025 _NOEXCEPT; 5026#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 5027 ~weak_ptr(); 5028 5029 _LIBCPP_INLINE_VISIBILITY 5030 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 5031 template<class _Yp> 5032 typename enable_if 5033 < 5034 is_convertible<_Yp*, element_type*>::value, 5035 weak_ptr& 5036 >::type 5037 _LIBCPP_INLINE_VISIBILITY 5038 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 5039 5040#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 5041 5042 _LIBCPP_INLINE_VISIBILITY 5043 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 5044 template<class _Yp> 5045 typename enable_if 5046 < 5047 is_convertible<_Yp*, element_type*>::value, 5048 weak_ptr& 5049 >::type 5050 _LIBCPP_INLINE_VISIBILITY 5051 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 5052 5053#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 5054 5055 template<class _Yp> 5056 typename enable_if 5057 < 5058 is_convertible<_Yp*, element_type*>::value, 5059 weak_ptr& 5060 >::type 5061 _LIBCPP_INLINE_VISIBILITY 5062 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 5063 5064 _LIBCPP_INLINE_VISIBILITY 5065 void swap(weak_ptr& __r) _NOEXCEPT; 5066 _LIBCPP_INLINE_VISIBILITY 5067 void reset() _NOEXCEPT; 5068 5069 _LIBCPP_INLINE_VISIBILITY 5070 long use_count() const _NOEXCEPT 5071 {return __cntrl_ ? __cntrl_->use_count() : 0;} 5072 _LIBCPP_INLINE_VISIBILITY 5073 bool expired() const _NOEXCEPT 5074 {return __cntrl_ == 0 || __cntrl_->use_count() == 0;} 5075 shared_ptr<_Tp> lock() const _NOEXCEPT; 5076 template<class _Up> 5077 _LIBCPP_INLINE_VISIBILITY 5078 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 5079 {return __cntrl_ < __r.__cntrl_;} 5080 template<class _Up> 5081 _LIBCPP_INLINE_VISIBILITY 5082 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 5083 {return __cntrl_ < __r.__cntrl_;} 5084 5085 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 5086 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 5087}; 5088 5089template<class _Tp> 5090inline 5091_LIBCPP_CONSTEXPR 5092weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 5093 : __ptr_(0), 5094 __cntrl_(0) 5095{ 5096} 5097 5098template<class _Tp> 5099inline 5100weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 5101 : __ptr_(__r.__ptr_), 5102 __cntrl_(__r.__cntrl_) 5103{ 5104 if (__cntrl_) 5105 __cntrl_->__add_weak(); 5106} 5107 5108template<class _Tp> 5109template<class _Yp> 5110inline 5111weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 5112 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5113 _NOEXCEPT 5114 : __ptr_(__r.__ptr_), 5115 __cntrl_(__r.__cntrl_) 5116{ 5117 if (__cntrl_) 5118 __cntrl_->__add_weak(); 5119} 5120 5121template<class _Tp> 5122template<class _Yp> 5123inline 5124weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 5125 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5126 _NOEXCEPT 5127 : __ptr_(__r.__ptr_), 5128 __cntrl_(__r.__cntrl_) 5129{ 5130 if (__cntrl_) 5131 __cntrl_->__add_weak(); 5132} 5133 5134#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 5135 5136template<class _Tp> 5137inline 5138weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 5139 : __ptr_(__r.__ptr_), 5140 __cntrl_(__r.__cntrl_) 5141{ 5142 __r.__ptr_ = 0; 5143 __r.__cntrl_ = 0; 5144} 5145 5146template<class _Tp> 5147template<class _Yp> 5148inline 5149weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 5150 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 5151 _NOEXCEPT 5152 : __ptr_(__r.__ptr_), 5153 __cntrl_(__r.__cntrl_) 5154{ 5155 __r.__ptr_ = 0; 5156 __r.__cntrl_ = 0; 5157} 5158 5159#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 5160 5161template<class _Tp> 5162weak_ptr<_Tp>::~weak_ptr() 5163{ 5164 if (__cntrl_) 5165 __cntrl_->__release_weak(); 5166} 5167 5168template<class _Tp> 5169inline 5170weak_ptr<_Tp>& 5171weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 5172{ 5173 weak_ptr(__r).swap(*this); 5174 return *this; 5175} 5176 5177template<class _Tp> 5178template<class _Yp> 5179inline 5180typename enable_if 5181< 5182 is_convertible<_Yp*, _Tp*>::value, 5183 weak_ptr<_Tp>& 5184>::type 5185weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 5186{ 5187 weak_ptr(__r).swap(*this); 5188 return *this; 5189} 5190 5191#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES 5192 5193template<class _Tp> 5194inline 5195weak_ptr<_Tp>& 5196weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 5197{ 5198 weak_ptr(_VSTD::move(__r)).swap(*this); 5199 return *this; 5200} 5201 5202template<class _Tp> 5203template<class _Yp> 5204inline 5205typename enable_if 5206< 5207 is_convertible<_Yp*, _Tp*>::value, 5208 weak_ptr<_Tp>& 5209>::type 5210weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 5211{ 5212 weak_ptr(_VSTD::move(__r)).swap(*this); 5213 return *this; 5214} 5215 5216#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES 5217 5218template<class _Tp> 5219template<class _Yp> 5220inline 5221typename enable_if 5222< 5223 is_convertible<_Yp*, _Tp*>::value, 5224 weak_ptr<_Tp>& 5225>::type 5226weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 5227{ 5228 weak_ptr(__r).swap(*this); 5229 return *this; 5230} 5231 5232template<class _Tp> 5233inline 5234void 5235weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 5236{ 5237 _VSTD::swap(__ptr_, __r.__ptr_); 5238 _VSTD::swap(__cntrl_, __r.__cntrl_); 5239} 5240 5241template<class _Tp> 5242inline _LIBCPP_INLINE_VISIBILITY 5243void 5244swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 5245{ 5246 __x.swap(__y); 5247} 5248 5249template<class _Tp> 5250inline 5251void 5252weak_ptr<_Tp>::reset() _NOEXCEPT 5253{ 5254 weak_ptr().swap(*this); 5255} 5256 5257template<class _Tp> 5258template<class _Yp> 5259shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 5260 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 5261 : __ptr_(__r.__ptr_), 5262 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 5263{ 5264 if (__cntrl_ == 0) 5265 __throw_bad_weak_ptr(); 5266} 5267 5268template<class _Tp> 5269shared_ptr<_Tp> 5270weak_ptr<_Tp>::lock() const _NOEXCEPT 5271{ 5272 shared_ptr<_Tp> __r; 5273 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 5274 if (__r.__cntrl_) 5275 __r.__ptr_ = __ptr_; 5276 return __r; 5277} 5278 5279#if _LIBCPP_STD_VER > 14 5280template <class _Tp = void> struct owner_less; 5281#else 5282template <class _Tp> struct owner_less; 5283#endif 5284 5285template <class _Tp> 5286struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 5287 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 5288{ 5289 typedef bool result_type; 5290 _LIBCPP_INLINE_VISIBILITY 5291 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5292 {return __x.owner_before(__y);} 5293 _LIBCPP_INLINE_VISIBILITY 5294 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5295 {return __x.owner_before(__y);} 5296 _LIBCPP_INLINE_VISIBILITY 5297 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5298 {return __x.owner_before(__y);} 5299}; 5300 5301template <class _Tp> 5302struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 5303 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 5304{ 5305 typedef bool result_type; 5306 _LIBCPP_INLINE_VISIBILITY 5307 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5308 {return __x.owner_before(__y);} 5309 _LIBCPP_INLINE_VISIBILITY 5310 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 5311 {return __x.owner_before(__y);} 5312 _LIBCPP_INLINE_VISIBILITY 5313 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 5314 {return __x.owner_before(__y);} 5315}; 5316 5317#if _LIBCPP_STD_VER > 14 5318template <> 5319struct _LIBCPP_TEMPLATE_VIS owner_less<void> 5320{ 5321 template <class _Tp, class _Up> 5322 _LIBCPP_INLINE_VISIBILITY 5323 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 5324 {return __x.owner_before(__y);} 5325 template <class _Tp, class _Up> 5326 _LIBCPP_INLINE_VISIBILITY 5327 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 5328 {return __x.owner_before(__y);} 5329 template <class _Tp, class _Up> 5330 _LIBCPP_INLINE_VISIBILITY 5331 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 5332 {return __x.owner_before(__y);} 5333 template <class _Tp, class _Up> 5334 _LIBCPP_INLINE_VISIBILITY 5335 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 5336 {return __x.owner_before(__y);} 5337 typedef void is_transparent; 5338}; 5339#endif 5340 5341template<class _Tp> 5342class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 5343{ 5344 mutable weak_ptr<_Tp> __weak_this_; 5345protected: 5346 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 5347 enable_shared_from_this() _NOEXCEPT {} 5348 _LIBCPP_INLINE_VISIBILITY 5349 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 5350 _LIBCPP_INLINE_VISIBILITY 5351 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 5352 {return *this;} 5353 _LIBCPP_INLINE_VISIBILITY 5354 ~enable_shared_from_this() {} 5355public: 5356 _LIBCPP_INLINE_VISIBILITY 5357 shared_ptr<_Tp> shared_from_this() 5358 {return shared_ptr<_Tp>(__weak_this_);} 5359 _LIBCPP_INLINE_VISIBILITY 5360 shared_ptr<_Tp const> shared_from_this() const 5361 {return shared_ptr<const _Tp>(__weak_this_);} 5362 5363#if _LIBCPP_STD_VER > 14 5364 _LIBCPP_INLINE_VISIBILITY 5365 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 5366 { return __weak_this_; } 5367 5368 _LIBCPP_INLINE_VISIBILITY 5369 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 5370 { return __weak_this_; } 5371#endif // _LIBCPP_STD_VER > 14 5372 5373 template <class _Up> friend class shared_ptr; 5374}; 5375 5376template <class _Tp> 5377struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 5378{ 5379 typedef shared_ptr<_Tp> argument_type; 5380 typedef size_t result_type; 5381 5382 _LIBCPP_INLINE_VISIBILITY 5383 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 5384 { 5385 return hash<_Tp*>()(__ptr.get()); 5386 } 5387}; 5388 5389template<class _CharT, class _Traits, class _Yp> 5390inline _LIBCPP_INLINE_VISIBILITY 5391basic_ostream<_CharT, _Traits>& 5392operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 5393 5394 5395#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5396 5397class _LIBCPP_TYPE_VIS __sp_mut 5398{ 5399 void* __lx; 5400public: 5401 void lock() _NOEXCEPT; 5402 void unlock() _NOEXCEPT; 5403 5404private: 5405 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 5406 __sp_mut(const __sp_mut&); 5407 __sp_mut& operator=(const __sp_mut&); 5408 5409 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 5410}; 5411 5412_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5413__sp_mut& __get_sp_mut(const void*); 5414 5415template <class _Tp> 5416inline _LIBCPP_INLINE_VISIBILITY 5417bool 5418atomic_is_lock_free(const shared_ptr<_Tp>*) 5419{ 5420 return false; 5421} 5422 5423template <class _Tp> 5424_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5425shared_ptr<_Tp> 5426atomic_load(const shared_ptr<_Tp>* __p) 5427{ 5428 __sp_mut& __m = __get_sp_mut(__p); 5429 __m.lock(); 5430 shared_ptr<_Tp> __q = *__p; 5431 __m.unlock(); 5432 return __q; 5433} 5434 5435template <class _Tp> 5436inline _LIBCPP_INLINE_VISIBILITY 5437_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5438shared_ptr<_Tp> 5439atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 5440{ 5441 return atomic_load(__p); 5442} 5443 5444template <class _Tp> 5445_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5446void 5447atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5448{ 5449 __sp_mut& __m = __get_sp_mut(__p); 5450 __m.lock(); 5451 __p->swap(__r); 5452 __m.unlock(); 5453} 5454 5455template <class _Tp> 5456inline _LIBCPP_INLINE_VISIBILITY 5457_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5458void 5459atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5460{ 5461 atomic_store(__p, __r); 5462} 5463 5464template <class _Tp> 5465_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5466shared_ptr<_Tp> 5467atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 5468{ 5469 __sp_mut& __m = __get_sp_mut(__p); 5470 __m.lock(); 5471 __p->swap(__r); 5472 __m.unlock(); 5473 return __r; 5474} 5475 5476template <class _Tp> 5477inline _LIBCPP_INLINE_VISIBILITY 5478_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5479shared_ptr<_Tp> 5480atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 5481{ 5482 return atomic_exchange(__p, __r); 5483} 5484 5485template <class _Tp> 5486_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5487bool 5488atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5489{ 5490 shared_ptr<_Tp> __temp; 5491 __sp_mut& __m = __get_sp_mut(__p); 5492 __m.lock(); 5493 if (__p->__owner_equivalent(*__v)) 5494 { 5495 _VSTD::swap(__temp, *__p); 5496 *__p = __w; 5497 __m.unlock(); 5498 return true; 5499 } 5500 _VSTD::swap(__temp, *__v); 5501 *__v = *__p; 5502 __m.unlock(); 5503 return false; 5504} 5505 5506template <class _Tp> 5507inline _LIBCPP_INLINE_VISIBILITY 5508_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5509bool 5510atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 5511{ 5512 return atomic_compare_exchange_strong(__p, __v, __w); 5513} 5514 5515template <class _Tp> 5516inline _LIBCPP_INLINE_VISIBILITY 5517_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5518bool 5519atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5520 shared_ptr<_Tp> __w, memory_order, memory_order) 5521{ 5522 return atomic_compare_exchange_strong(__p, __v, __w); 5523} 5524 5525template <class _Tp> 5526inline _LIBCPP_INLINE_VISIBILITY 5527_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 5528bool 5529atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 5530 shared_ptr<_Tp> __w, memory_order, memory_order) 5531{ 5532 return atomic_compare_exchange_weak(__p, __v, __w); 5533} 5534 5535#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 5536 5537//enum class 5538#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 5539# ifndef _LIBCPP_CXX03_LANG 5540enum class pointer_safety : unsigned char { 5541 relaxed, 5542 preferred, 5543 strict 5544}; 5545# endif 5546#else 5547struct _LIBCPP_TYPE_VIS pointer_safety 5548{ 5549 enum __lx 5550 { 5551 relaxed, 5552 preferred, 5553 strict 5554 }; 5555 5556 __lx __v_; 5557 5558 _LIBCPP_INLINE_VISIBILITY 5559 pointer_safety() : __v_() {} 5560 5561 _LIBCPP_INLINE_VISIBILITY 5562 pointer_safety(__lx __v) : __v_(__v) {} 5563 _LIBCPP_INLINE_VISIBILITY 5564 operator int() const {return __v_;} 5565}; 5566#endif 5567 5568#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 5569 defined(_LIBCPP_BUILDING_LIBRARY) 5570_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 5571#else 5572// This function is only offered in C++03 under ABI v1. 5573# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 5574inline _LIBCPP_INLINE_VISIBILITY 5575pointer_safety get_pointer_safety() _NOEXCEPT { 5576 return pointer_safety::relaxed; 5577} 5578# endif 5579#endif 5580 5581 5582_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 5583_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 5584_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 5585_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 5586 5587template <class _Tp> 5588inline _LIBCPP_INLINE_VISIBILITY 5589_Tp* 5590undeclare_reachable(_Tp* __p) 5591{ 5592 return static_cast<_Tp*>(__undeclare_reachable(__p)); 5593} 5594 5595_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 5596 5597// --- Helper for container swap -- 5598template <typename _Alloc> 5599inline _LIBCPP_INLINE_VISIBILITY 5600void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 5601#if _LIBCPP_STD_VER >= 14 5602 _NOEXCEPT 5603#else 5604 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5605#endif 5606{ 5607 __swap_allocator(__a1, __a2, 5608 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 5609} 5610 5611template <typename _Alloc> 5612_LIBCPP_INLINE_VISIBILITY 5613void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 5614#if _LIBCPP_STD_VER >= 14 5615 _NOEXCEPT 5616#else 5617 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 5618#endif 5619{ 5620 using _VSTD::swap; 5621 swap(__a1, __a2); 5622} 5623 5624template <typename _Alloc> 5625inline _LIBCPP_INLINE_VISIBILITY 5626void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 5627 5628template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 5629struct __noexcept_move_assign_container : public integral_constant<bool, 5630 _Traits::propagate_on_container_move_assignment::value 5631#if _LIBCPP_STD_VER > 14 5632 || _Traits::is_always_equal::value 5633#else 5634 && is_nothrow_move_assignable<_Alloc>::value 5635#endif 5636 > {}; 5637 5638 5639#ifndef _LIBCPP_HAS_NO_VARIADICS 5640template <class _Tp, class _Alloc> 5641struct __temp_value { 5642 typedef allocator_traits<_Alloc> _Traits; 5643 5644 typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; 5645 _Alloc &__a; 5646 5647 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 5648 _Tp & get() { return *__addr(); } 5649 5650 template<class... _Args> 5651 _LIBCPP_NO_CFI 5652 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) { 5653 _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)), 5654 _VSTD::forward<_Args>(__args)...); 5655 } 5656 5657 ~__temp_value() { _Traits::destroy(__a, __addr()); } 5658 }; 5659#endif 5660 5661template<typename _Alloc, typename = void, typename = void> 5662struct __is_allocator : false_type {}; 5663 5664template<typename _Alloc> 5665struct __is_allocator<_Alloc, 5666 typename __void_t<typename _Alloc::value_type>::type, 5667 typename __void_t<decltype(_VSTD::declval<_Alloc&>().allocate(size_t(0)))>::type 5668 > 5669 : true_type {}; 5670 5671_LIBCPP_END_NAMESPACE_STD 5672 5673_LIBCPP_POP_MACROS 5674 5675#endif // _LIBCPP_MEMORY 5676