1// -*- C++ -*- 2//===-------------------------- memory ------------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_MEMORY 11#define _LIBCPP_MEMORY 12 13/* 14 memory synopsis 15 16namespace std 17{ 18 19struct allocator_arg_t { }; 20inline constexpr allocator_arg_t allocator_arg = allocator_arg_t(); 21 22template <class T, class Alloc> struct uses_allocator; 23 24template <class Ptr> 25struct pointer_traits 26{ 27 typedef Ptr pointer; 28 typedef <details> element_type; 29 typedef <details> difference_type; 30 31 template <class U> using rebind = <details>; 32 33 static pointer pointer_to(<details>); 34}; 35 36template <class T> 37struct pointer_traits<T*> 38{ 39 typedef T* pointer; 40 typedef T element_type; 41 typedef ptrdiff_t difference_type; 42 43 template <class U> using rebind = U*; 44 45 static pointer pointer_to(<details>) noexcept; // constexpr in C++20 46}; 47 48template <class T> constexpr T* to_address(T* p) noexcept; // C++20 49template <class Ptr> auto to_address(const Ptr& p) noexcept; // C++20 50 51template <class Alloc> 52struct allocator_traits 53{ 54 typedef Alloc allocator_type; 55 typedef typename allocator_type::value_type 56 value_type; 57 58 typedef Alloc::pointer | value_type* pointer; 59 typedef Alloc::const_pointer 60 | pointer_traits<pointer>::rebind<const value_type> 61 const_pointer; 62 typedef Alloc::void_pointer 63 | pointer_traits<pointer>::rebind<void> 64 void_pointer; 65 typedef Alloc::const_void_pointer 66 | pointer_traits<pointer>::rebind<const void> 67 const_void_pointer; 68 typedef Alloc::difference_type 69 | pointer_traits<pointer>::difference_type 70 difference_type; 71 typedef Alloc::size_type 72 | make_unsigned<difference_type>::type 73 size_type; 74 typedef Alloc::propagate_on_container_copy_assignment 75 | false_type propagate_on_container_copy_assignment; 76 typedef Alloc::propagate_on_container_move_assignment 77 | false_type propagate_on_container_move_assignment; 78 typedef Alloc::propagate_on_container_swap 79 | false_type propagate_on_container_swap; 80 typedef Alloc::is_always_equal 81 | is_empty is_always_equal; 82 83 template <class T> using rebind_alloc = Alloc::rebind<T>::other | Alloc<T, Args...>; 84 template <class T> using rebind_traits = allocator_traits<rebind_alloc<T>>; 85 86 static pointer allocate(allocator_type& a, size_type n); // constexpr and [[nodiscard]] in C++20 87 static pointer allocate(allocator_type& a, size_type n, const_void_pointer hint); // constexpr and [[nodiscard]] in C++20 88 89 static void deallocate(allocator_type& a, pointer p, size_type n) noexcept; // constexpr in C++20 90 91 template <class T, class... Args> 92 static void construct(allocator_type& a, T* p, Args&&... args); // constexpr in C++20 93 94 template <class T> 95 static void destroy(allocator_type& a, T* p); // constexpr in C++20 96 97 static size_type max_size(const allocator_type& a); // noexcept in C++14, constexpr in C++20 98 static allocator_type select_on_container_copy_construction(const allocator_type& a); // constexpr in C++20 99}; 100 101template <> 102class allocator<void> // deprecated in C++17, removed in C++20 103{ 104public: 105 typedef void* pointer; 106 typedef const void* const_pointer; 107 typedef void value_type; 108 109 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 110}; 111 112template <class T> 113class allocator 114{ 115public: 116 typedef size_t size_type; 117 typedef ptrdiff_t difference_type; 118 typedef T* pointer; // deprecated in C++17, removed in C++20 119 typedef const T* const_pointer; // deprecated in C++17, removed in C++20 120 typedef typename add_lvalue_reference<T>::type 121 reference; // deprecated in C++17, removed in C++20 122 typedef typename add_lvalue_reference<const T>::type 123 const_reference; // deprecated in C++17, removed in C++20 124 125 typedef T value_type; 126 127 template <class U> struct rebind {typedef allocator<U> other;}; // deprecated in C++17, removed in C++20 128 129 typedef true_type propagate_on_container_move_assignment; 130 typedef true_type is_always_equal; 131 132 constexpr allocator() noexcept; // constexpr in C++20 133 constexpr allocator(const allocator&) noexcept; // constexpr in C++20 134 template <class U> 135 constexpr allocator(const allocator<U>&) noexcept; // constexpr in C++20 136 ~allocator(); // constexpr in C++20 137 pointer address(reference x) const noexcept; // deprecated in C++17, removed in C++20 138 const_pointer address(const_reference x) const noexcept; // deprecated in C++17, removed in C++20 139 T* allocate(size_t n, const void* hint); // deprecated in C++17, removed in C++20 140 T* allocate(size_t n); // constexpr in C++20 141 void deallocate(T* p, size_t n) noexcept; // constexpr in C++20 142 size_type max_size() const noexcept; // deprecated in C++17, removed in C++20 143 template<class U, class... Args> 144 void construct(U* p, Args&&... args); // deprecated in C++17, removed in C++20 145 template <class U> 146 void destroy(U* p); // deprecated in C++17, removed in C++20 147}; 148 149template <class T, class U> 150bool operator==(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20 151 152template <class T, class U> 153bool operator!=(const allocator<T>&, const allocator<U>&) noexcept; // constexpr in C++20 154 155template <class OutputIterator, class T> 156class raw_storage_iterator 157 : public iterator<output_iterator_tag, 158 T, // purposefully not C++03 159 ptrdiff_t, // purposefully not C++03 160 T*, // purposefully not C++03 161 raw_storage_iterator&> // purposefully not C++03 162{ 163public: 164 explicit raw_storage_iterator(OutputIterator x); 165 raw_storage_iterator& operator*(); 166 raw_storage_iterator& operator=(const T& element); 167 raw_storage_iterator& operator++(); 168 raw_storage_iterator operator++(int); 169}; 170 171template <class T> pair<T*,ptrdiff_t> get_temporary_buffer(ptrdiff_t n) noexcept; 172template <class T> void return_temporary_buffer(T* p) noexcept; 173 174template <class T> T* addressof(T& r) noexcept; 175template <class T> T* addressof(const T&& r) noexcept = delete; 176 177template <class InputIterator, class ForwardIterator> 178ForwardIterator 179uninitialized_copy(InputIterator first, InputIterator last, ForwardIterator result); 180 181template <class InputIterator, class Size, class ForwardIterator> 182ForwardIterator 183uninitialized_copy_n(InputIterator first, Size n, ForwardIterator result); 184 185template <class ForwardIterator, class T> 186void uninitialized_fill(ForwardIterator first, ForwardIterator last, const T& x); 187 188template <class ForwardIterator, class Size, class T> 189ForwardIterator 190uninitialized_fill_n(ForwardIterator first, Size n, const T& x); 191 192template <class T, class ...Args> 193constexpr T* construct_at(T* location, Args&& ...args); // since C++20 194 195template <class T> 196void destroy_at(T* location); // constexpr in C++20 197 198template <class ForwardIterator> 199void destroy(ForwardIterator first, ForwardIterator last); // constexpr in C++20 200 201template <class ForwardIterator, class Size> 202ForwardIterator destroy_n(ForwardIterator first, Size n); // constexpr in C++20 203 204template <class InputIterator, class ForwardIterator> 205 ForwardIterator uninitialized_move(InputIterator first, InputIterator last, ForwardIterator result); 206 207template <class InputIterator, class Size, class ForwardIterator> 208 pair<InputIterator,ForwardIterator> uninitialized_move_n(InputIterator first, Size n, ForwardIterator result); 209 210template <class ForwardIterator> 211 void uninitialized_value_construct(ForwardIterator first, ForwardIterator last); 212 213template <class ForwardIterator, class Size> 214 ForwardIterator uninitialized_value_construct_n(ForwardIterator first, Size n); 215 216template <class ForwardIterator> 217 void uninitialized_default_construct(ForwardIterator first, ForwardIterator last); 218 219template <class ForwardIterator, class Size> 220 ForwardIterator uninitialized_default_construct_n(ForwardIterator first, Size n); 221 222template <class Y> struct auto_ptr_ref {}; // deprecated in C++11, removed in C++17 223 224template<class X> 225class auto_ptr // deprecated in C++11, removed in C++17 226{ 227public: 228 typedef X element_type; 229 230 explicit auto_ptr(X* p =0) throw(); 231 auto_ptr(auto_ptr&) throw(); 232 template<class Y> auto_ptr(auto_ptr<Y>&) throw(); 233 auto_ptr& operator=(auto_ptr&) throw(); 234 template<class Y> auto_ptr& operator=(auto_ptr<Y>&) throw(); 235 auto_ptr& operator=(auto_ptr_ref<X> r) throw(); 236 ~auto_ptr() throw(); 237 238 typename add_lvalue_reference<X>::type operator*() const throw(); 239 X* operator->() const throw(); 240 X* get() const throw(); 241 X* release() throw(); 242 void reset(X* p =0) throw(); 243 244 auto_ptr(auto_ptr_ref<X>) throw(); 245 template<class Y> operator auto_ptr_ref<Y>() throw(); 246 template<class Y> operator auto_ptr<Y>() throw(); 247}; 248 249template <class T> 250struct default_delete 251{ 252 constexpr default_delete() noexcept = default; 253 template <class U> default_delete(const default_delete<U>&) noexcept; 254 255 void operator()(T*) const noexcept; 256}; 257 258template <class T> 259struct default_delete<T[]> 260{ 261 constexpr default_delete() noexcept = default; 262 void operator()(T*) const noexcept; 263 template <class U> void operator()(U*) const = delete; 264}; 265 266template <class T, class D = default_delete<T>> 267class unique_ptr 268{ 269public: 270 typedef see below pointer; 271 typedef T element_type; 272 typedef D deleter_type; 273 274 // constructors 275 constexpr unique_ptr() noexcept; 276 explicit unique_ptr(pointer p) noexcept; 277 unique_ptr(pointer p, see below d1) noexcept; 278 unique_ptr(pointer p, see below d2) noexcept; 279 unique_ptr(unique_ptr&& u) noexcept; 280 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 281 template <class U, class E> 282 unique_ptr(unique_ptr<U, E>&& u) noexcept; 283 template <class U> 284 unique_ptr(auto_ptr<U>&& u) noexcept; // removed in C++17 285 286 // destructor 287 ~unique_ptr(); 288 289 // assignment 290 unique_ptr& operator=(unique_ptr&& u) noexcept; 291 template <class U, class E> unique_ptr& operator=(unique_ptr<U, E>&& u) noexcept; 292 unique_ptr& operator=(nullptr_t) noexcept; 293 294 // observers 295 typename add_lvalue_reference<T>::type operator*() const; 296 pointer operator->() const noexcept; 297 pointer get() const noexcept; 298 deleter_type& get_deleter() noexcept; 299 const deleter_type& get_deleter() const noexcept; 300 explicit operator bool() const noexcept; 301 302 // modifiers 303 pointer release() noexcept; 304 void reset(pointer p = pointer()) noexcept; 305 void swap(unique_ptr& u) noexcept; 306}; 307 308template <class T, class D> 309class unique_ptr<T[], D> 310{ 311public: 312 typedef implementation-defined pointer; 313 typedef T element_type; 314 typedef D deleter_type; 315 316 // constructors 317 constexpr unique_ptr() noexcept; 318 explicit unique_ptr(pointer p) noexcept; 319 unique_ptr(pointer p, see below d) noexcept; 320 unique_ptr(pointer p, see below d) noexcept; 321 unique_ptr(unique_ptr&& u) noexcept; 322 unique_ptr(nullptr_t) noexcept : unique_ptr() { } 323 324 // destructor 325 ~unique_ptr(); 326 327 // assignment 328 unique_ptr& operator=(unique_ptr&& u) noexcept; 329 unique_ptr& operator=(nullptr_t) noexcept; 330 331 // observers 332 T& operator[](size_t i) const; 333 pointer get() const noexcept; 334 deleter_type& get_deleter() noexcept; 335 const deleter_type& get_deleter() const noexcept; 336 explicit operator bool() const noexcept; 337 338 // modifiers 339 pointer release() noexcept; 340 void reset(pointer p = pointer()) noexcept; 341 void reset(nullptr_t) noexcept; 342 template <class U> void reset(U) = delete; 343 void swap(unique_ptr& u) noexcept; 344}; 345 346template <class T, class D> 347 void swap(unique_ptr<T, D>& x, unique_ptr<T, D>& y) noexcept; 348 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); 353template <class T1, class D1, class T2, class D2> 354 bool operator<(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 355template <class T1, class D1, class T2, class D2> 356 bool operator<=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 357template <class T1, class D1, class T2, class D2> 358 bool operator>(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 359template <class T1, class D1, class T2, class D2> 360 bool operator>=(const unique_ptr<T1, D1>& x, const unique_ptr<T2, D2>& y); 361 362template <class T, class D> 363 bool operator==(const unique_ptr<T, D>& x, nullptr_t) noexcept; 364template <class T, class D> 365 bool operator==(nullptr_t, const unique_ptr<T, D>& y) noexcept; 366template <class T, class D> 367 bool operator!=(const unique_ptr<T, D>& x, nullptr_t) noexcept; 368template <class T, class D> 369 bool operator!=(nullptr_t, const unique_ptr<T, D>& y) noexcept; 370 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); 379template <class T, class D> 380 bool operator>(const unique_ptr<T, D>& x, nullptr_t); 381template <class T, class D> 382 bool operator>(nullptr_t, const unique_ptr<T, D>& y); 383template <class T, class D> 384 bool operator>=(const unique_ptr<T, D>& x, nullptr_t); 385template <class T, class D> 386 bool operator>=(nullptr_t, const unique_ptr<T, D>& y); 387 388class bad_weak_ptr 389 : public std::exception 390{ 391 bad_weak_ptr() noexcept; 392}; 393 394template<class T, class... Args> unique_ptr<T> make_unique(Args&&... args); // C++14 395template<class T> unique_ptr<T> make_unique(size_t n); // C++14 396template<class T, class... Args> unspecified make_unique(Args&&...) = delete; // C++14, T == U[N] 397 398template<class E, class T, class Y, class D> 399 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, unique_ptr<Y, D> const& p); 400 401template<class T> 402class shared_ptr 403{ 404public: 405 typedef T element_type; 406 typedef weak_ptr<T> weak_type; // C++17 407 408 // constructors: 409 constexpr shared_ptr() noexcept; 410 template<class Y> explicit shared_ptr(Y* p); 411 template<class Y, class D> shared_ptr(Y* p, D d); 412 template<class Y, class D, class A> shared_ptr(Y* p, D d, A a); 413 template <class D> shared_ptr(nullptr_t p, D d); 414 template <class D, class A> shared_ptr(nullptr_t p, D d, A a); 415 template<class Y> shared_ptr(const shared_ptr<Y>& r, T *p) noexcept; 416 shared_ptr(const shared_ptr& r) noexcept; 417 template<class Y> shared_ptr(const shared_ptr<Y>& r) noexcept; 418 shared_ptr(shared_ptr&& r) noexcept; 419 template<class Y> shared_ptr(shared_ptr<Y>&& r) noexcept; 420 template<class Y> explicit shared_ptr(const weak_ptr<Y>& r); 421 template<class Y> shared_ptr(auto_ptr<Y>&& r); // removed in C++17 422 template <class Y, class D> shared_ptr(unique_ptr<Y, D>&& r); 423 shared_ptr(nullptr_t) : shared_ptr() { } 424 425 // destructor: 426 ~shared_ptr(); 427 428 // assignment: 429 shared_ptr& operator=(const shared_ptr& r) noexcept; 430 template<class Y> shared_ptr& operator=(const shared_ptr<Y>& r) noexcept; 431 shared_ptr& operator=(shared_ptr&& r) noexcept; 432 template<class Y> shared_ptr& operator=(shared_ptr<Y>&& r); 433 template<class Y> shared_ptr& operator=(auto_ptr<Y>&& r); // removed in C++17 434 template <class Y, class D> shared_ptr& operator=(unique_ptr<Y, D>&& r); 435 436 // modifiers: 437 void swap(shared_ptr& r) noexcept; 438 void reset() noexcept; 439 template<class Y> void reset(Y* p); 440 template<class Y, class D> void reset(Y* p, D d); 441 template<class Y, class D, class A> void reset(Y* p, D d, A a); 442 443 // observers: 444 T* get() const noexcept; 445 T& operator*() const noexcept; 446 T* operator->() const noexcept; 447 long use_count() const noexcept; 448 bool unique() const noexcept; 449 explicit operator bool() const noexcept; 450 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 451 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 452}; 453 454template<class T> 455shared_ptr(weak_ptr<T>) -> shared_ptr<T>; 456template<class T, class D> 457shared_ptr(unique_ptr<T, D>) -> shared_ptr<T>; 458 459// shared_ptr comparisons: 460template<class T, class U> 461 bool operator==(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 462template<class T, class U> 463 bool operator!=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 464template<class T, class U> 465 bool operator<(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 466template<class T, class U> 467 bool operator>(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 468template<class T, class U> 469 bool operator<=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 470template<class T, class U> 471 bool operator>=(shared_ptr<T> const& a, shared_ptr<U> const& b) noexcept; 472 473template <class T> 474 bool operator==(const shared_ptr<T>& x, nullptr_t) noexcept; 475template <class T> 476 bool operator==(nullptr_t, const shared_ptr<T>& y) noexcept; 477template <class T> 478 bool operator!=(const shared_ptr<T>& x, nullptr_t) noexcept; 479template <class T> 480 bool operator!=(nullptr_t, const shared_ptr<T>& y) noexcept; 481template <class T> 482 bool operator<(const shared_ptr<T>& x, nullptr_t) noexcept; 483template <class T> 484bool operator<(nullptr_t, const shared_ptr<T>& y) noexcept; 485template <class T> 486 bool operator<=(const shared_ptr<T>& x, nullptr_t) noexcept; 487template <class T> 488 bool operator<=(nullptr_t, const shared_ptr<T>& y) noexcept; 489template <class T> 490 bool operator>(const shared_ptr<T>& x, nullptr_t) noexcept; 491template <class T> 492 bool operator>(nullptr_t, const shared_ptr<T>& y) noexcept; 493template <class T> 494 bool operator>=(const shared_ptr<T>& x, nullptr_t) noexcept; 495template <class T> 496 bool operator>=(nullptr_t, const shared_ptr<T>& y) noexcept; 497 498// shared_ptr specialized algorithms: 499template<class T> void swap(shared_ptr<T>& a, shared_ptr<T>& b) noexcept; 500 501// shared_ptr casts: 502template<class T, class U> 503 shared_ptr<T> static_pointer_cast(shared_ptr<U> const& r) noexcept; 504template<class T, class U> 505 shared_ptr<T> dynamic_pointer_cast(shared_ptr<U> const& r) noexcept; 506template<class T, class U> 507 shared_ptr<T> const_pointer_cast(shared_ptr<U> const& r) noexcept; 508 509// shared_ptr I/O: 510template<class E, class T, class Y> 511 basic_ostream<E, T>& operator<< (basic_ostream<E, T>& os, shared_ptr<Y> const& p); 512 513// shared_ptr get_deleter: 514template<class D, class T> D* get_deleter(shared_ptr<T> const& p) noexcept; 515 516template<class T, class... Args> 517 shared_ptr<T> make_shared(Args&&... args); 518template<class T, class A, class... Args> 519 shared_ptr<T> allocate_shared(const A& a, Args&&... args); 520 521template<class T> 522class weak_ptr 523{ 524public: 525 typedef T element_type; 526 527 // constructors 528 constexpr weak_ptr() noexcept; 529 template<class Y> weak_ptr(shared_ptr<Y> const& r) noexcept; 530 weak_ptr(weak_ptr const& r) noexcept; 531 template<class Y> weak_ptr(weak_ptr<Y> const& r) noexcept; 532 weak_ptr(weak_ptr&& r) noexcept; // C++14 533 template<class Y> weak_ptr(weak_ptr<Y>&& r) noexcept; // C++14 534 535 // destructor 536 ~weak_ptr(); 537 538 // assignment 539 weak_ptr& operator=(weak_ptr const& r) noexcept; 540 template<class Y> weak_ptr& operator=(weak_ptr<Y> const& r) noexcept; 541 template<class Y> weak_ptr& operator=(shared_ptr<Y> const& r) noexcept; 542 weak_ptr& operator=(weak_ptr&& r) noexcept; // C++14 543 template<class Y> weak_ptr& operator=(weak_ptr<Y>&& r) noexcept; // C++14 544 545 // modifiers 546 void swap(weak_ptr& r) noexcept; 547 void reset() noexcept; 548 549 // observers 550 long use_count() const noexcept; 551 bool expired() const noexcept; 552 shared_ptr<T> lock() const noexcept; 553 template<class U> bool owner_before(shared_ptr<U> const& b) const noexcept; 554 template<class U> bool owner_before(weak_ptr<U> const& b) const noexcept; 555}; 556 557template<class T> 558weak_ptr(shared_ptr<T>) -> weak_ptr<T>; 559 560// weak_ptr specialized algorithms: 561template<class T> void swap(weak_ptr<T>& a, weak_ptr<T>& b) noexcept; 562 563// class owner_less: 564template<class T> struct owner_less; 565 566template<class T> 567struct owner_less<shared_ptr<T> > 568 : binary_function<shared_ptr<T>, shared_ptr<T>, bool> 569{ 570 typedef bool result_type; 571 bool operator()(shared_ptr<T> const&, shared_ptr<T> const&) const noexcept; 572 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 573 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 574}; 575 576template<class T> 577struct owner_less<weak_ptr<T> > 578 : binary_function<weak_ptr<T>, weak_ptr<T>, bool> 579{ 580 typedef bool result_type; 581 bool operator()(weak_ptr<T> const&, weak_ptr<T> const&) const noexcept; 582 bool operator()(shared_ptr<T> const&, weak_ptr<T> const&) const noexcept; 583 bool operator()(weak_ptr<T> const&, shared_ptr<T> const&) const noexcept; 584}; 585 586template <> // Added in C++14 587struct owner_less<void> 588{ 589 template <class _Tp, class _Up> 590 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 591 template <class _Tp, class _Up> 592 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 593 template <class _Tp, class _Up> 594 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const noexcept; 595 template <class _Tp, class _Up> 596 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const noexcept; 597 598 typedef void is_transparent; 599}; 600 601template<class T> 602class enable_shared_from_this 603{ 604protected: 605 constexpr enable_shared_from_this() noexcept; 606 enable_shared_from_this(enable_shared_from_this const&) noexcept; 607 enable_shared_from_this& operator=(enable_shared_from_this const&) noexcept; 608 ~enable_shared_from_this(); 609public: 610 shared_ptr<T> shared_from_this(); 611 shared_ptr<T const> shared_from_this() const; 612}; 613 614template<class T> 615 bool atomic_is_lock_free(const shared_ptr<T>* p); 616template<class T> 617 shared_ptr<T> atomic_load(const shared_ptr<T>* p); 618template<class T> 619 shared_ptr<T> atomic_load_explicit(const shared_ptr<T>* p, memory_order mo); 620template<class T> 621 void atomic_store(shared_ptr<T>* p, shared_ptr<T> r); 622template<class T> 623 void atomic_store_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 624template<class T> 625 shared_ptr<T> atomic_exchange(shared_ptr<T>* p, shared_ptr<T> r); 626template<class T> 627 shared_ptr<T> 628 atomic_exchange_explicit(shared_ptr<T>* p, shared_ptr<T> r, memory_order mo); 629template<class T> 630 bool 631 atomic_compare_exchange_weak(shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 632template<class T> 633 bool 634 atomic_compare_exchange_strong( shared_ptr<T>* p, shared_ptr<T>* v, shared_ptr<T> w); 635template<class T> 636 bool 637 atomic_compare_exchange_weak_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 638 shared_ptr<T> w, memory_order success, 639 memory_order failure); 640template<class T> 641 bool 642 atomic_compare_exchange_strong_explicit(shared_ptr<T>* p, shared_ptr<T>* v, 643 shared_ptr<T> w, memory_order success, 644 memory_order failure); 645// Hash support 646template <class T> struct hash; 647template <class T, class D> struct hash<unique_ptr<T, D> >; 648template <class T> struct hash<shared_ptr<T> >; 649 650template <class T, class Alloc> 651 inline constexpr bool uses_allocator_v = uses_allocator<T, Alloc>::value; 652 653// Pointer safety 654enum class pointer_safety { relaxed, preferred, strict }; 655void declare_reachable(void *p); 656template <class T> T *undeclare_reachable(T *p); 657void declare_no_pointers(char *p, size_t n); 658void undeclare_no_pointers(char *p, size_t n); 659pointer_safety get_pointer_safety() noexcept; 660 661void* align(size_t alignment, size_t size, void*& ptr, size_t& space); 662 663} // std 664 665*/ 666 667#include <__config> 668#include <type_traits> 669#include <typeinfo> 670#include <cstddef> 671#include <cstdint> 672#include <new> 673#include <utility> 674#include <limits> 675#include <iterator> 676#include <__functional_base> 677#include <iosfwd> 678#include <tuple> 679#include <stdexcept> 680#include <cstring> 681#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 682# include <atomic> 683#endif 684#include <version> 685 686#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 687#pragma GCC system_header 688#endif 689 690_LIBCPP_PUSH_MACROS 691#include <__undef_macros> 692 693 694_LIBCPP_BEGIN_NAMESPACE_STD 695 696template <class _ValueType> 697inline _LIBCPP_INLINE_VISIBILITY 698_ValueType __libcpp_relaxed_load(_ValueType const* __value) { 699#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 700 defined(__ATOMIC_RELAXED) && \ 701 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 702 return __atomic_load_n(__value, __ATOMIC_RELAXED); 703#else 704 return *__value; 705#endif 706} 707 708template <class _ValueType> 709inline _LIBCPP_INLINE_VISIBILITY 710_ValueType __libcpp_acquire_load(_ValueType const* __value) { 711#if !defined(_LIBCPP_HAS_NO_THREADS) && \ 712 defined(__ATOMIC_ACQUIRE) && \ 713 (__has_builtin(__atomic_load_n) || defined(_LIBCPP_COMPILER_GCC)) 714 return __atomic_load_n(__value, __ATOMIC_ACQUIRE); 715#else 716 return *__value; 717#endif 718} 719 720// addressof moved to <type_traits> 721 722template <class _Tp> class allocator; 723 724#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 725template <> 726class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 allocator<void> 727{ 728public: 729 typedef void* pointer; 730 typedef const void* const_pointer; 731 typedef void value_type; 732 733 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 734}; 735 736template <> 737class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 allocator<const void> 738{ 739public: 740 typedef const void* pointer; 741 typedef const void* const_pointer; 742 typedef const void value_type; 743 744 template <class _Up> struct rebind {typedef allocator<_Up> other;}; 745}; 746#endif 747 748// pointer_traits 749 750template <class _Tp, class = void> 751struct __has_element_type : false_type {}; 752 753template <class _Tp> 754struct __has_element_type<_Tp, 755 typename __void_t<typename _Tp::element_type>::type> : true_type {}; 756 757template <class _Ptr, bool = __has_element_type<_Ptr>::value> 758struct __pointer_traits_element_type; 759 760template <class _Ptr> 761struct __pointer_traits_element_type<_Ptr, true> 762{ 763 typedef _LIBCPP_NODEBUG_TYPE typename _Ptr::element_type type; 764}; 765 766template <template <class, class...> class _Sp, class _Tp, class ..._Args> 767struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, true> 768{ 769 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::element_type type; 770}; 771 772template <template <class, class...> class _Sp, class _Tp, class ..._Args> 773struct __pointer_traits_element_type<_Sp<_Tp, _Args...>, false> 774{ 775 typedef _LIBCPP_NODEBUG_TYPE _Tp type; 776}; 777 778template <class _Tp, class = void> 779struct __has_difference_type : false_type {}; 780 781template <class _Tp> 782struct __has_difference_type<_Tp, 783 typename __void_t<typename _Tp::difference_type>::type> : true_type {}; 784 785template <class _Ptr, bool = __has_difference_type<_Ptr>::value> 786struct __pointer_traits_difference_type 787{ 788 typedef _LIBCPP_NODEBUG_TYPE ptrdiff_t type; 789}; 790 791template <class _Ptr> 792struct __pointer_traits_difference_type<_Ptr, true> 793{ 794 typedef _LIBCPP_NODEBUG_TYPE typename _Ptr::difference_type type; 795}; 796 797template <class _Tp, class _Up> 798struct __has_rebind 799{ 800private: 801 struct __two {char __lx; char __lxx;}; 802 template <class _Xp> static __two __test(...); 803 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 804 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>* = 0); 805 _LIBCPP_SUPPRESS_DEPRECATED_POP 806public: 807 static const bool value = sizeof(__test<_Tp>(0)) == 1; 808}; 809 810template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 811struct __pointer_traits_rebind 812{ 813#ifndef _LIBCPP_CXX03_LANG 814 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up> type; 815#else 816 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up>::other type; 817#endif 818}; 819 820template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 821struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, true> 822{ 823#ifndef _LIBCPP_CXX03_LANG 824 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::template rebind<_Up> type; 825#else 826 typedef _LIBCPP_NODEBUG_TYPE typename _Sp<_Tp, _Args...>::template rebind<_Up>::other type; 827#endif 828}; 829 830template <template <class, class...> class _Sp, class _Tp, class ..._Args, class _Up> 831struct __pointer_traits_rebind<_Sp<_Tp, _Args...>, _Up, false> 832{ 833 typedef _Sp<_Up, _Args...> type; 834}; 835 836template <class _Ptr> 837struct _LIBCPP_TEMPLATE_VIS pointer_traits 838{ 839 typedef _Ptr pointer; 840 typedef typename __pointer_traits_element_type<pointer>::type element_type; 841 typedef typename __pointer_traits_difference_type<pointer>::type difference_type; 842 843#ifndef _LIBCPP_CXX03_LANG 844 template <class _Up> using rebind = typename __pointer_traits_rebind<pointer, _Up>::type; 845#else 846 template <class _Up> struct rebind 847 {typedef typename __pointer_traits_rebind<pointer, _Up>::type other;}; 848#endif // _LIBCPP_CXX03_LANG 849 850private: 851 struct __nat {}; 852public: 853 _LIBCPP_INLINE_VISIBILITY 854 static pointer pointer_to(typename conditional<is_void<element_type>::value, 855 __nat, element_type>::type& __r) 856 {return pointer::pointer_to(__r);} 857}; 858 859template <class _Tp> 860struct _LIBCPP_TEMPLATE_VIS pointer_traits<_Tp*> 861{ 862 typedef _Tp* pointer; 863 typedef _Tp element_type; 864 typedef ptrdiff_t difference_type; 865 866#ifndef _LIBCPP_CXX03_LANG 867 template <class _Up> using rebind = _Up*; 868#else 869 template <class _Up> struct rebind {typedef _Up* other;}; 870#endif 871 872private: 873 struct __nat {}; 874public: 875 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 876 static pointer pointer_to(typename conditional<is_void<element_type>::value, 877 __nat, element_type>::type& __r) _NOEXCEPT 878 {return _VSTD::addressof(__r);} 879}; 880 881template <class _From, class _To> 882struct __rebind_pointer { 883#ifndef _LIBCPP_CXX03_LANG 884 typedef typename pointer_traits<_From>::template rebind<_To> type; 885#else 886 typedef typename pointer_traits<_From>::template rebind<_To>::other type; 887#endif 888}; 889 890// construct_at 891 892#if _LIBCPP_STD_VER > 17 893 894template<class _Tp> 895_LIBCPP_CONSTEXPR_AFTER_CXX17 void* __voidify(_Tp& __ptr) noexcept { 896 return const_cast<void*>(static_cast<const volatile void*>(_VSTD::addressof(__ptr))); 897} 898 899template<class _Tp, class ..._Args, class = decltype( 900 ::new (_VSTD::declval<void*>()) _Tp(_VSTD::declval<_Args>()...) 901)> 902_LIBCPP_INLINE_VISIBILITY 903constexpr _Tp* construct_at(_Tp* __location, _Args&& ...__args) { 904 _LIBCPP_ASSERT(__location, "null pointer given to construct_at"); 905 return ::new (_VSTD::__voidify(*__location)) _Tp(_VSTD::forward<_Args>(__args)...); 906} 907 908#endif 909 910// destroy_at 911 912#if _LIBCPP_STD_VER > 14 913 914template <class _Tp> 915inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 916void destroy_at(_Tp* __loc) { 917 _LIBCPP_ASSERT(__loc, "null pointer given to destroy_at"); 918 __loc->~_Tp(); 919} 920 921#endif 922 923// allocator_traits 924 925template <class _Tp, class = void> 926struct __has_pointer_type : false_type {}; 927 928template <class _Tp> 929struct __has_pointer_type<_Tp, 930 typename __void_t<typename _Tp::pointer>::type> : true_type {}; 931 932namespace __pointer_type_imp 933{ 934 935template <class _Tp, class _Dp, bool = __has_pointer_type<_Dp>::value> 936struct __pointer_type 937{ 938 typedef _LIBCPP_NODEBUG_TYPE typename _Dp::pointer type; 939}; 940 941template <class _Tp, class _Dp> 942struct __pointer_type<_Tp, _Dp, false> 943{ 944 typedef _LIBCPP_NODEBUG_TYPE _Tp* type; 945}; 946 947} // __pointer_type_imp 948 949template <class _Tp, class _Dp> 950struct __pointer_type 951{ 952 typedef _LIBCPP_NODEBUG_TYPE typename __pointer_type_imp::__pointer_type<_Tp, typename remove_reference<_Dp>::type>::type type; 953}; 954 955template <class _Tp, class = void> 956struct __has_const_pointer : false_type {}; 957 958template <class _Tp> 959struct __has_const_pointer<_Tp, 960 typename __void_t<typename _Tp::const_pointer>::type> : true_type {}; 961 962template <class _Tp, class _Ptr, class _Alloc, bool = __has_const_pointer<_Alloc>::value> 963struct __const_pointer 964{ 965 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::const_pointer type; 966}; 967 968template <class _Tp, class _Ptr, class _Alloc> 969struct __const_pointer<_Tp, _Ptr, _Alloc, false> 970{ 971#ifndef _LIBCPP_CXX03_LANG 972 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const _Tp> type; 973#else 974 typedef typename pointer_traits<_Ptr>::template rebind<const _Tp>::other type; 975#endif 976}; 977 978template <class _Tp, class = void> 979struct __has_void_pointer : false_type {}; 980 981template <class _Tp> 982struct __has_void_pointer<_Tp, 983 typename __void_t<typename _Tp::void_pointer>::type> : true_type {}; 984 985template <class _Ptr, class _Alloc, bool = __has_void_pointer<_Alloc>::value> 986struct __void_pointer 987{ 988 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::void_pointer type; 989}; 990 991template <class _Ptr, class _Alloc> 992struct __void_pointer<_Ptr, _Alloc, false> 993{ 994#ifndef _LIBCPP_CXX03_LANG 995 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<void> type; 996#else 997 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<void>::other type; 998#endif 999}; 1000 1001template <class _Tp, class = void> 1002struct __has_const_void_pointer : false_type {}; 1003 1004template <class _Tp> 1005struct __has_const_void_pointer<_Tp, 1006 typename __void_t<typename _Tp::const_void_pointer>::type> : true_type {}; 1007 1008template <class _Ptr, class _Alloc, bool = __has_const_void_pointer<_Alloc>::value> 1009struct __const_void_pointer 1010{ 1011 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::const_void_pointer type; 1012}; 1013 1014template <class _Ptr, class _Alloc> 1015struct __const_void_pointer<_Ptr, _Alloc, false> 1016{ 1017#ifndef _LIBCPP_CXX03_LANG 1018 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const void> type; 1019#else 1020 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::template rebind<const void>::other type; 1021#endif 1022}; 1023 1024 1025template <bool _UsePointerTraits> struct __to_address_helper; 1026 1027template <> struct __to_address_helper<true> { 1028 template <class _Pointer> 1029 using __return_type = decltype(pointer_traits<_Pointer>::to_address(std::declval<const _Pointer&>())); 1030 1031 template <class _Pointer> 1032 _LIBCPP_CONSTEXPR 1033 static __return_type<_Pointer> 1034 __do_it(const _Pointer &__p) _NOEXCEPT { return pointer_traits<_Pointer>::to_address(__p); } 1035}; 1036 1037template <class _Pointer, bool _Dummy = true> 1038using __choose_to_address = __to_address_helper<_IsValidExpansion<__to_address_helper<_Dummy>::template __return_type, _Pointer>::value>; 1039 1040 1041template <class _Tp> 1042inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1043_Tp* 1044__to_address(_Tp* __p) _NOEXCEPT 1045{ 1046 static_assert(!is_function<_Tp>::value, "_Tp is a function type"); 1047 return __p; 1048} 1049 1050template <class _Pointer> 1051inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1052typename __choose_to_address<_Pointer>::template __return_type<_Pointer> 1053__to_address(const _Pointer& __p) _NOEXCEPT { 1054 return __choose_to_address<_Pointer>::__do_it(__p); 1055} 1056 1057template <> struct __to_address_helper<false> { 1058 template <class _Pointer> 1059 using __return_type = typename pointer_traits<_Pointer>::element_type*; 1060 1061 template <class _Pointer> 1062 _LIBCPP_CONSTEXPR 1063 static __return_type<_Pointer> 1064 __do_it(const _Pointer &__p) _NOEXCEPT { return std::__to_address(__p.operator->()); } 1065}; 1066 1067 1068#if _LIBCPP_STD_VER > 17 1069template <class _Tp> 1070inline _LIBCPP_INLINE_VISIBILITY constexpr 1071_Tp* 1072to_address(_Tp* __p) _NOEXCEPT 1073{ 1074 static_assert(!is_function_v<_Tp>, "_Tp is a function type"); 1075 return __p; 1076} 1077 1078template <class _Pointer> 1079inline _LIBCPP_INLINE_VISIBILITY 1080auto 1081to_address(const _Pointer& __p) _NOEXCEPT 1082{ 1083 return _VSTD::__to_address(__p); 1084} 1085#endif 1086 1087template <class _Tp, class = void> 1088struct __has_size_type : false_type {}; 1089 1090template <class _Tp> 1091struct __has_size_type<_Tp, 1092 typename __void_t<typename _Tp::size_type>::type> : true_type {}; 1093 1094template <class _Alloc, class _DiffType, bool = __has_size_type<_Alloc>::value> 1095struct __size_type 1096{ 1097 typedef _LIBCPP_NODEBUG_TYPE typename make_unsigned<_DiffType>::type type; 1098}; 1099 1100template <class _Alloc, class _DiffType> 1101struct __size_type<_Alloc, _DiffType, true> 1102{ 1103 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::size_type type; 1104}; 1105 1106template <class _Tp, class = void> 1107struct __has_propagate_on_container_copy_assignment : false_type {}; 1108 1109template <class _Tp> 1110struct __has_propagate_on_container_copy_assignment<_Tp, 1111 typename __void_t<typename _Tp::propagate_on_container_copy_assignment>::type> 1112 : true_type {}; 1113 1114template <class _Alloc, bool = __has_propagate_on_container_copy_assignment<_Alloc>::value> 1115struct __propagate_on_container_copy_assignment 1116{ 1117 typedef _LIBCPP_NODEBUG_TYPE false_type type; 1118}; 1119 1120template <class _Alloc> 1121struct __propagate_on_container_copy_assignment<_Alloc, true> 1122{ 1123 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_copy_assignment type; 1124}; 1125 1126template <class _Tp, class = void> 1127struct __has_propagate_on_container_move_assignment : false_type {}; 1128 1129template <class _Tp> 1130struct __has_propagate_on_container_move_assignment<_Tp, 1131 typename __void_t<typename _Tp::propagate_on_container_move_assignment>::type> 1132 : true_type {}; 1133 1134template <class _Alloc, bool = __has_propagate_on_container_move_assignment<_Alloc>::value> 1135struct __propagate_on_container_move_assignment 1136{ 1137 typedef false_type type; 1138}; 1139 1140template <class _Alloc> 1141struct __propagate_on_container_move_assignment<_Alloc, true> 1142{ 1143 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_move_assignment type; 1144}; 1145 1146template <class _Tp, class = void> 1147struct __has_propagate_on_container_swap : false_type {}; 1148 1149template <class _Tp> 1150struct __has_propagate_on_container_swap<_Tp, 1151 typename __void_t<typename _Tp::propagate_on_container_swap>::type> 1152 : true_type {}; 1153 1154template <class _Alloc, bool = __has_propagate_on_container_swap<_Alloc>::value> 1155struct __propagate_on_container_swap 1156{ 1157 typedef false_type type; 1158}; 1159 1160template <class _Alloc> 1161struct __propagate_on_container_swap<_Alloc, true> 1162{ 1163 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::propagate_on_container_swap type; 1164}; 1165 1166template <class _Tp, class = void> 1167struct __has_is_always_equal : false_type {}; 1168 1169template <class _Tp> 1170struct __has_is_always_equal<_Tp, 1171 typename __void_t<typename _Tp::is_always_equal>::type> 1172 : true_type {}; 1173 1174template <class _Alloc, bool = __has_is_always_equal<_Alloc>::value> 1175struct __is_always_equal 1176{ 1177 typedef _LIBCPP_NODEBUG_TYPE typename _VSTD::is_empty<_Alloc>::type type; 1178}; 1179 1180template <class _Alloc> 1181struct __is_always_equal<_Alloc, true> 1182{ 1183 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::is_always_equal type; 1184}; 1185 1186template <class _Tp, class _Up, bool = __has_rebind<_Tp, _Up>::value> 1187struct __has_rebind_other 1188{ 1189private: 1190 struct __two {char __lx; char __lxx;}; 1191 template <class _Xp> static __two __test(...); 1192 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1193 template <class _Xp> static char __test(typename _Xp::template rebind<_Up>::other* = 0); 1194 _LIBCPP_SUPPRESS_DEPRECATED_POP 1195public: 1196 static const bool value = sizeof(__test<_Tp>(0)) == 1; 1197}; 1198 1199template <class _Tp, class _Up> 1200struct __has_rebind_other<_Tp, _Up, false> 1201{ 1202 static const bool value = false; 1203}; 1204 1205template <class _Tp, class _Up, bool = __has_rebind_other<_Tp, _Up>::value> 1206struct __allocator_traits_rebind 1207{ 1208 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1209 typedef _LIBCPP_NODEBUG_TYPE typename _Tp::template rebind<_Up>::other type; 1210 _LIBCPP_SUPPRESS_DEPRECATED_POP 1211}; 1212 1213template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1214struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, true> 1215{ 1216 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1217 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc<_Tp, _Args...>::template rebind<_Up>::other type; 1218 _LIBCPP_SUPPRESS_DEPRECATED_POP 1219}; 1220 1221template <template <class, class...> class _Alloc, class _Tp, class ..._Args, class _Up> 1222struct __allocator_traits_rebind<_Alloc<_Tp, _Args...>, _Up, false> 1223{ 1224 typedef _LIBCPP_NODEBUG_TYPE _Alloc<_Up, _Args...> type; 1225}; 1226 1227#ifndef _LIBCPP_CXX03_LANG 1228 1229_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1230template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1231auto 1232__has_allocate_hint_test(_Alloc&& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1233 -> decltype((void)__a.allocate(__sz, __p), true_type()); 1234_LIBCPP_SUPPRESS_DEPRECATED_POP 1235 1236template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1237auto 1238__has_allocate_hint_test(const _Alloc& __a, _SizeType&& __sz, _ConstVoidPtr&& __p) 1239 -> false_type; 1240 1241template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1242struct __has_allocate_hint 1243 : decltype(_VSTD::__has_allocate_hint_test(declval<_Alloc>(), 1244 declval<_SizeType>(), 1245 declval<_ConstVoidPtr>())) 1246{ 1247}; 1248 1249#else // _LIBCPP_CXX03_LANG 1250 1251template <class _Alloc, class _SizeType, class _ConstVoidPtr> 1252struct __has_allocate_hint 1253 : true_type 1254{ 1255}; 1256 1257#endif // _LIBCPP_CXX03_LANG 1258 1259_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1260template <class _Alloc, class ..._Args, 1261 class = decltype(_VSTD::declval<_Alloc>().construct(_VSTD::declval<_Args>()...))> 1262static true_type __test_has_construct(int); 1263_LIBCPP_SUPPRESS_DEPRECATED_POP 1264 1265template <class _Alloc, class...> 1266static false_type __test_has_construct(...); 1267 1268template <class _Alloc, class ..._Args> 1269struct __has_construct : decltype(__test_has_construct<_Alloc, _Args...>(0)) {}; 1270 1271#if !defined(_LIBCPP_CXX03_LANG) 1272 1273_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1274template <class _Alloc, class _Pointer> 1275auto 1276__has_destroy_test(_Alloc&& __a, _Pointer&& __p) 1277 -> decltype(__a.destroy(__p), true_type()); 1278_LIBCPP_SUPPRESS_DEPRECATED_POP 1279 1280template <class _Alloc, class _Pointer> 1281auto 1282__has_destroy_test(const _Alloc& __a, _Pointer&& __p) 1283 -> false_type; 1284 1285template <class _Alloc, class _Pointer> 1286struct __has_destroy 1287 : decltype(_VSTD::__has_destroy_test(declval<_Alloc>(), 1288 declval<_Pointer>())) 1289{ 1290}; 1291 1292_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1293template <class _Alloc> 1294auto 1295__has_max_size_test(_Alloc&& __a) 1296 -> decltype(__a.max_size(), true_type()); 1297_LIBCPP_SUPPRESS_DEPRECATED_POP 1298 1299template <class _Alloc> 1300auto 1301__has_max_size_test(const volatile _Alloc& __a) 1302 -> false_type; 1303 1304template <class _Alloc> 1305struct __has_max_size 1306 : decltype(_VSTD::__has_max_size_test(declval<_Alloc&>())) 1307{ 1308}; 1309 1310template <class _Alloc> 1311auto 1312__has_select_on_container_copy_construction_test(_Alloc&& __a) 1313 -> decltype(__a.select_on_container_copy_construction(), true_type()); 1314 1315template <class _Alloc> 1316auto 1317__has_select_on_container_copy_construction_test(const volatile _Alloc& __a) 1318 -> false_type; 1319 1320template <class _Alloc> 1321struct __has_select_on_container_copy_construction 1322 : decltype(_VSTD::__has_select_on_container_copy_construction_test(declval<_Alloc&>())) 1323{ 1324}; 1325 1326#else // _LIBCPP_CXX03_LANG 1327 1328template <class _Alloc, class _Pointer, class = void> 1329struct __has_destroy : false_type {}; 1330 1331template <class _Alloc, class _Pointer> 1332struct __has_destroy<_Alloc, _Pointer, typename __void_t< 1333 decltype(_VSTD::declval<_Alloc>().destroy(_VSTD::declval<_Pointer>())) 1334>::type> : std::true_type {}; 1335 1336template <class _Alloc> 1337struct __has_max_size 1338 : true_type 1339{ 1340}; 1341 1342template <class _Alloc> 1343struct __has_select_on_container_copy_construction 1344 : false_type 1345{ 1346}; 1347 1348#endif // _LIBCPP_CXX03_LANG 1349 1350template <class _Alloc, class _Ptr, bool = __has_difference_type<_Alloc>::value> 1351struct __alloc_traits_difference_type 1352{ 1353 typedef _LIBCPP_NODEBUG_TYPE typename pointer_traits<_Ptr>::difference_type type; 1354}; 1355 1356template <class _Alloc, class _Ptr> 1357struct __alloc_traits_difference_type<_Alloc, _Ptr, true> 1358{ 1359 typedef _LIBCPP_NODEBUG_TYPE typename _Alloc::difference_type type; 1360}; 1361 1362template <class _Tp> 1363struct __is_default_allocator : false_type {}; 1364 1365template <class _Tp> 1366struct __is_default_allocator<_VSTD::allocator<_Tp> > : true_type {}; 1367 1368 1369 1370template <class _Alloc, 1371 bool = __has_construct<_Alloc, typename _Alloc::value_type*, typename _Alloc::value_type&&>::value && !__is_default_allocator<_Alloc>::value 1372 > 1373struct __is_cpp17_move_insertable; 1374template <class _Alloc> 1375struct __is_cpp17_move_insertable<_Alloc, true> : std::true_type {}; 1376template <class _Alloc> 1377struct __is_cpp17_move_insertable<_Alloc, false> : std::is_move_constructible<typename _Alloc::value_type> {}; 1378 1379template <class _Alloc, 1380 bool = __has_construct<_Alloc, typename _Alloc::value_type*, const typename _Alloc::value_type&>::value && !__is_default_allocator<_Alloc>::value 1381 > 1382struct __is_cpp17_copy_insertable; 1383template <class _Alloc> 1384struct __is_cpp17_copy_insertable<_Alloc, true> : __is_cpp17_move_insertable<_Alloc> {}; 1385template <class _Alloc> 1386struct __is_cpp17_copy_insertable<_Alloc, false> : integral_constant<bool, 1387 std::is_copy_constructible<typename _Alloc::value_type>::value && 1388 __is_cpp17_move_insertable<_Alloc>::value> 1389 {}; 1390 1391 1392 1393template <class _Alloc> 1394struct _LIBCPP_TEMPLATE_VIS allocator_traits 1395{ 1396 typedef _Alloc allocator_type; 1397 typedef typename allocator_type::value_type value_type; 1398 1399 typedef typename __pointer_type<value_type, allocator_type>::type pointer; 1400 typedef typename __const_pointer<value_type, pointer, allocator_type>::type const_pointer; 1401 typedef typename __void_pointer<pointer, allocator_type>::type void_pointer; 1402 typedef typename __const_void_pointer<pointer, allocator_type>::type const_void_pointer; 1403 1404 typedef typename __alloc_traits_difference_type<allocator_type, pointer>::type difference_type; 1405 typedef typename __size_type<allocator_type, difference_type>::type size_type; 1406 1407 typedef typename __propagate_on_container_copy_assignment<allocator_type>::type 1408 propagate_on_container_copy_assignment; 1409 typedef typename __propagate_on_container_move_assignment<allocator_type>::type 1410 propagate_on_container_move_assignment; 1411 typedef typename __propagate_on_container_swap<allocator_type>::type 1412 propagate_on_container_swap; 1413 typedef typename __is_always_equal<allocator_type>::type 1414 is_always_equal; 1415 1416#ifndef _LIBCPP_CXX03_LANG 1417 template <class _Tp> using rebind_alloc = 1418 typename __allocator_traits_rebind<allocator_type, _Tp>::type; 1419 template <class _Tp> using rebind_traits = allocator_traits<rebind_alloc<_Tp> >; 1420#else // _LIBCPP_CXX03_LANG 1421 template <class _Tp> struct rebind_alloc 1422 {typedef typename __allocator_traits_rebind<allocator_type, _Tp>::type other;}; 1423 template <class _Tp> struct rebind_traits 1424 {typedef allocator_traits<typename rebind_alloc<_Tp>::other> other;}; 1425#endif // _LIBCPP_CXX03_LANG 1426 1427 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1428 static pointer allocate(allocator_type& __a, size_type __n) 1429 {return __a.allocate(__n);} 1430 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1431 static pointer allocate(allocator_type& __a, size_type __n, const_void_pointer __hint) 1432 {return __allocate(__a, __n, __hint, 1433 __has_allocate_hint<allocator_type, size_type, const_void_pointer>());} 1434 1435 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1436 static void deallocate(allocator_type& __a, pointer __p, size_type __n) _NOEXCEPT 1437 {__a.deallocate(__p, __n);} 1438 1439 template <class _Tp, class... _Args> 1440 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1441 static void construct(allocator_type& __a, _Tp* __p, _Args&&... __args) 1442 {__construct(__has_construct<allocator_type, _Tp*, _Args...>(), 1443 __a, __p, _VSTD::forward<_Args>(__args)...);} 1444 1445 template <class _Tp> 1446 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1447 static void destroy(allocator_type& __a, _Tp* __p) 1448 {__destroy(__has_destroy<allocator_type, _Tp*>(), __a, __p);} 1449 1450 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1451 static size_type max_size(const allocator_type& __a) _NOEXCEPT 1452 {return __max_size(__has_max_size<const allocator_type>(), __a);} 1453 1454 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1455 static allocator_type 1456 select_on_container_copy_construction(const allocator_type& __a) 1457 {return __select_on_container_copy_construction( 1458 __has_select_on_container_copy_construction<const allocator_type>(), 1459 __a);} 1460 1461 template <class _Ptr> 1462 _LIBCPP_INLINE_VISIBILITY 1463 static 1464 void 1465 __construct_forward_with_exception_guarantees(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __begin2) 1466 { 1467 static_assert(__is_cpp17_move_insertable<allocator_type>::value, 1468 "The specified type does not meet the requirements of Cpp17MoveInsertible"); 1469 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1470 construct(__a, _VSTD::__to_address(__begin2), 1471#ifdef _LIBCPP_NO_EXCEPTIONS 1472 _VSTD::move(*__begin1) 1473#else 1474 _VSTD::move_if_noexcept(*__begin1) 1475#endif 1476 ); 1477 } 1478 1479 template <class _Tp> 1480 _LIBCPP_INLINE_VISIBILITY 1481 static 1482 typename enable_if 1483 < 1484 (__is_default_allocator<allocator_type>::value 1485 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1486 is_trivially_move_constructible<_Tp>::value, 1487 void 1488 >::type 1489 __construct_forward_with_exception_guarantees(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __begin2) 1490 { 1491 ptrdiff_t _Np = __end1 - __begin1; 1492 if (_Np > 0) 1493 { 1494 _VSTD::memcpy(__begin2, __begin1, _Np * sizeof(_Tp)); 1495 __begin2 += _Np; 1496 } 1497 } 1498 1499 template <class _Iter, class _Ptr> 1500 _LIBCPP_INLINE_VISIBILITY 1501 static 1502 void 1503 __construct_range_forward(allocator_type& __a, _Iter __begin1, _Iter __end1, _Ptr& __begin2) 1504 { 1505 for (; __begin1 != __end1; ++__begin1, (void) ++__begin2) 1506 construct(__a, _VSTD::__to_address(__begin2), *__begin1); 1507 } 1508 1509 template <class _SourceTp, class _DestTp, 1510 class _RawSourceTp = typename remove_const<_SourceTp>::type, 1511 class _RawDestTp = typename remove_const<_DestTp>::type> 1512 _LIBCPP_INLINE_VISIBILITY 1513 static 1514 typename enable_if 1515 < 1516 is_trivially_copy_constructible<_DestTp>::value && 1517 is_same<_RawSourceTp, _RawDestTp>::value && 1518 (__is_default_allocator<allocator_type>::value || 1519 !__has_construct<allocator_type, _DestTp*, _SourceTp&>::value), 1520 void 1521 >::type 1522 __construct_range_forward(allocator_type&, _SourceTp* __begin1, _SourceTp* __end1, _DestTp*& __begin2) 1523 { 1524 ptrdiff_t _Np = __end1 - __begin1; 1525 if (_Np > 0) 1526 { 1527 _VSTD::memcpy(const_cast<_RawDestTp*>(__begin2), __begin1, _Np * sizeof(_DestTp)); 1528 __begin2 += _Np; 1529 } 1530 } 1531 1532 template <class _Ptr> 1533 _LIBCPP_INLINE_VISIBILITY 1534 static 1535 void 1536 __construct_backward_with_exception_guarantees(allocator_type& __a, _Ptr __begin1, _Ptr __end1, _Ptr& __end2) 1537 { 1538 static_assert(__is_cpp17_move_insertable<allocator_type>::value, 1539 "The specified type does not meet the requirements of Cpp17MoveInsertable"); 1540 while (__end1 != __begin1) 1541 { 1542 construct(__a, _VSTD::__to_address(__end2 - 1), 1543#ifdef _LIBCPP_NO_EXCEPTIONS 1544 _VSTD::move(*--__end1) 1545#else 1546 _VSTD::move_if_noexcept(*--__end1) 1547#endif 1548 ); 1549 --__end2; 1550 } 1551 } 1552 1553 template <class _Tp> 1554 _LIBCPP_INLINE_VISIBILITY 1555 static 1556 typename enable_if 1557 < 1558 (__is_default_allocator<allocator_type>::value 1559 || !__has_construct<allocator_type, _Tp*, _Tp>::value) && 1560 is_trivially_move_constructible<_Tp>::value, 1561 void 1562 >::type 1563 __construct_backward_with_exception_guarantees(allocator_type&, _Tp* __begin1, _Tp* __end1, _Tp*& __end2) 1564 { 1565 ptrdiff_t _Np = __end1 - __begin1; 1566 __end2 -= _Np; 1567 if (_Np > 0) 1568 _VSTD::memcpy(__end2, __begin1, _Np * sizeof(_Tp)); 1569 } 1570 1571private: 1572 1573 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1574 static pointer __allocate(allocator_type& __a, size_type __n, 1575 const_void_pointer __hint, true_type) 1576 { 1577 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1578 return __a.allocate(__n, __hint); 1579 _LIBCPP_SUPPRESS_DEPRECATED_POP 1580 } 1581 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1582 static pointer __allocate(allocator_type& __a, size_type __n, 1583 const_void_pointer, false_type) 1584 {return __a.allocate(__n);} 1585 1586 template <class _Tp, class... _Args> 1587 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1588 static void __construct(true_type, allocator_type& __a, _Tp* __p, _Args&&... __args) 1589 { 1590 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1591 __a.construct(__p, _VSTD::forward<_Args>(__args)...); 1592 _LIBCPP_SUPPRESS_DEPRECATED_POP 1593 } 1594 1595 template <class _Tp, class... _Args> 1596 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1597 static void __construct(false_type, allocator_type&, _Tp* __p, _Args&&... __args) 1598 { 1599#if _LIBCPP_STD_VER > 17 1600 _VSTD::construct_at(__p, _VSTD::forward<_Args>(__args)...); 1601#else 1602 ::new ((void*)__p) _Tp(_VSTD::forward<_Args>(__args)...); 1603#endif 1604 } 1605 1606 template <class _Tp> 1607 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1608 static void __destroy(true_type, allocator_type& __a, _Tp* __p) 1609 { 1610 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1611 __a.destroy(__p); 1612 _LIBCPP_SUPPRESS_DEPRECATED_POP 1613 } 1614 template <class _Tp> 1615 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1616 static void __destroy(false_type, allocator_type&, _Tp* __p) 1617 { 1618#if _LIBCPP_STD_VER > 17 1619 _VSTD::destroy_at(__p); 1620#else 1621 __p->~_Tp(); 1622#endif 1623 } 1624 1625 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1626 static size_type __max_size(true_type, const allocator_type& __a) _NOEXCEPT 1627 { 1628 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 1629 return __a.max_size(); 1630 _LIBCPP_SUPPRESS_DEPRECATED_POP 1631 } 1632 1633 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1634 static size_type __max_size(false_type, const allocator_type&) _NOEXCEPT 1635 {return numeric_limits<size_type>::max() / sizeof(value_type);} 1636 1637 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1638 static allocator_type 1639 __select_on_container_copy_construction(true_type, const allocator_type& __a) 1640 {return __a.select_on_container_copy_construction();} 1641 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1642 static allocator_type 1643 __select_on_container_copy_construction(false_type, const allocator_type& __a) 1644 {return __a;} 1645}; 1646 1647template <class _Traits, class _Tp> 1648struct __rebind_alloc_helper 1649{ 1650#ifndef _LIBCPP_CXX03_LANG 1651 typedef _LIBCPP_NODEBUG_TYPE typename _Traits::template rebind_alloc<_Tp> type; 1652#else 1653 typedef typename _Traits::template rebind_alloc<_Tp>::other type; 1654#endif 1655}; 1656 1657// allocator 1658 1659template <class _Tp> 1660class _LIBCPP_TEMPLATE_VIS allocator 1661{ 1662public: 1663 typedef size_t size_type; 1664 typedef ptrdiff_t difference_type; 1665 typedef _Tp value_type; 1666 typedef true_type propagate_on_container_move_assignment; 1667 typedef true_type is_always_equal; 1668 1669 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1670 allocator() _NOEXCEPT { } 1671 1672 template <class _Up> 1673 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1674 allocator(const allocator<_Up>&) _NOEXCEPT { } 1675 1676 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1677 _Tp* allocate(size_t __n) { 1678 if (__n > allocator_traits<allocator>::max_size(*this)) 1679 __throw_length_error("allocator<T>::allocate(size_t n)" 1680 " 'n' exceeds maximum supported size"); 1681 if (__libcpp_is_constant_evaluated()) { 1682 return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp))); 1683 } else { 1684 return static_cast<_Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1685 } 1686 } 1687 1688 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1689 void deallocate(_Tp* __p, size_t __n) _NOEXCEPT { 1690 if (__libcpp_is_constant_evaluated()) { 1691 ::operator delete(__p); 1692 } else { 1693 _VSTD::__libcpp_deallocate((void*)__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 1694 } 1695 } 1696 1697 // C++20 Removed members 1698#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1699 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp* pointer; 1700 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 1701 _LIBCPP_DEPRECATED_IN_CXX17 typedef _Tp& reference; 1702 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 1703 1704 template <class _Up> 1705 struct _LIBCPP_DEPRECATED_IN_CXX17 rebind { 1706 typedef allocator<_Up> other; 1707 }; 1708 1709 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1710 pointer address(reference __x) const _NOEXCEPT { 1711 return _VSTD::addressof(__x); 1712 } 1713 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1714 const_pointer address(const_reference __x) const _NOEXCEPT { 1715 return _VSTD::addressof(__x); 1716 } 1717 1718 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 1719 _Tp* allocate(size_t __n, const void*) { 1720 return allocate(__n); 1721 } 1722 1723 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT { 1724 return size_type(~0) / sizeof(_Tp); 1725 } 1726 1727 template <class _Up, class... _Args> 1728 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1729 void construct(_Up* __p, _Args&&... __args) { 1730 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1731 } 1732 1733 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1734 void destroy(pointer __p) { 1735 __p->~_Tp(); 1736 } 1737#endif 1738}; 1739 1740template <class _Tp> 1741class _LIBCPP_TEMPLATE_VIS allocator<const _Tp> 1742{ 1743public: 1744 typedef size_t size_type; 1745 typedef ptrdiff_t difference_type; 1746 typedef const _Tp value_type; 1747 typedef true_type propagate_on_container_move_assignment; 1748 typedef true_type is_always_equal; 1749 1750 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1751 allocator() _NOEXCEPT { } 1752 1753 template <class _Up> 1754 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1755 allocator(const allocator<_Up>&) _NOEXCEPT { } 1756 1757 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1758 const _Tp* allocate(size_t __n) { 1759 if (__n > allocator_traits<allocator>::max_size(*this)) 1760 __throw_length_error("allocator<const T>::allocate(size_t n)" 1761 " 'n' exceeds maximum supported size"); 1762 if (__libcpp_is_constant_evaluated()) { 1763 return static_cast<const _Tp*>(::operator new(__n * sizeof(_Tp))); 1764 } else { 1765 return static_cast<const _Tp*>(_VSTD::__libcpp_allocate(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp))); 1766 } 1767 } 1768 1769 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1770 void deallocate(const _Tp* __p, size_t __n) { 1771 if (__libcpp_is_constant_evaluated()) { 1772 ::operator delete(const_cast<_Tp*>(__p)); 1773 } else { 1774 _VSTD::__libcpp_deallocate((void*) const_cast<_Tp *>(__p), __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 1775 } 1776 } 1777 1778 // C++20 Removed members 1779#if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS) 1780 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* pointer; 1781 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp* const_pointer; 1782 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& reference; 1783 _LIBCPP_DEPRECATED_IN_CXX17 typedef const _Tp& const_reference; 1784 1785 template <class _Up> 1786 struct _LIBCPP_DEPRECATED_IN_CXX17 rebind { 1787 typedef allocator<_Up> other; 1788 }; 1789 1790 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1791 const_pointer address(const_reference __x) const _NOEXCEPT { 1792 return _VSTD::addressof(__x); 1793 } 1794 1795 _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY _LIBCPP_DEPRECATED_IN_CXX17 1796 const _Tp* allocate(size_t __n, const void*) { 1797 return allocate(__n); 1798 } 1799 1800 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY size_type max_size() const _NOEXCEPT { 1801 return size_type(~0) / sizeof(_Tp); 1802 } 1803 1804 template <class _Up, class... _Args> 1805 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1806 void construct(_Up* __p, _Args&&... __args) { 1807 ::new((void*)__p) _Up(_VSTD::forward<_Args>(__args)...); 1808 } 1809 1810 _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_INLINE_VISIBILITY 1811 void destroy(pointer __p) { 1812 __p->~_Tp(); 1813 } 1814#endif 1815}; 1816 1817template <class _Tp, class _Up> 1818inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1819bool operator==(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return true;} 1820 1821template <class _Tp, class _Up> 1822inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 1823bool operator!=(const allocator<_Tp>&, const allocator<_Up>&) _NOEXCEPT {return false;} 1824 1825template <class _OutputIterator, class _Tp> 1826class _LIBCPP_TEMPLATE_VIS raw_storage_iterator 1827 : public iterator<output_iterator_tag, 1828 _Tp, // purposefully not C++03 1829 ptrdiff_t, // purposefully not C++03 1830 _Tp*, // purposefully not C++03 1831 raw_storage_iterator<_OutputIterator, _Tp>&> // purposefully not C++03 1832{ 1833private: 1834 _OutputIterator __x_; 1835public: 1836 _LIBCPP_INLINE_VISIBILITY explicit raw_storage_iterator(_OutputIterator __x) : __x_(__x) {} 1837 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator*() {return *this;} 1838 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(const _Tp& __element) 1839 {::new(_VSTD::addressof(*__x_)) _Tp(__element); return *this;} 1840#if _LIBCPP_STD_VER >= 14 1841 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator=(_Tp&& __element) 1842 {::new(_VSTD::addressof(*__x_)) _Tp(_VSTD::move(__element)); return *this;} 1843#endif 1844 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator& operator++() {++__x_; return *this;} 1845 _LIBCPP_INLINE_VISIBILITY raw_storage_iterator operator++(int) 1846 {raw_storage_iterator __t(*this); ++__x_; return __t;} 1847#if _LIBCPP_STD_VER >= 14 1848 _LIBCPP_INLINE_VISIBILITY _OutputIterator base() const { return __x_; } 1849#endif 1850}; 1851 1852template <class _Tp> 1853_LIBCPP_NODISCARD_EXT _LIBCPP_NO_CFI 1854pair<_Tp*, ptrdiff_t> 1855get_temporary_buffer(ptrdiff_t __n) _NOEXCEPT 1856{ 1857 pair<_Tp*, ptrdiff_t> __r(0, 0); 1858 const ptrdiff_t __m = (~ptrdiff_t(0) ^ 1859 ptrdiff_t(ptrdiff_t(1) << (sizeof(ptrdiff_t) * __CHAR_BIT__ - 1))) 1860 / sizeof(_Tp); 1861 if (__n > __m) 1862 __n = __m; 1863 while (__n > 0) 1864 { 1865#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) 1866 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 1867 { 1868 std::align_val_t __al = 1869 std::align_val_t(std::alignment_of<_Tp>::value); 1870 __r.first = static_cast<_Tp*>(::operator new( 1871 __n * sizeof(_Tp), __al, nothrow)); 1872 } else { 1873 __r.first = static_cast<_Tp*>(::operator new( 1874 __n * sizeof(_Tp), nothrow)); 1875 } 1876#else 1877 if (__is_overaligned_for_new(_LIBCPP_ALIGNOF(_Tp))) 1878 { 1879 // Since aligned operator new is unavailable, return an empty 1880 // buffer rather than one with invalid alignment. 1881 return __r; 1882 } 1883 1884 __r.first = static_cast<_Tp*>(::operator new(__n * sizeof(_Tp), nothrow)); 1885#endif 1886 1887 if (__r.first) 1888 { 1889 __r.second = __n; 1890 break; 1891 } 1892 __n /= 2; 1893 } 1894 return __r; 1895} 1896 1897template <class _Tp> 1898inline _LIBCPP_INLINE_VISIBILITY 1899void return_temporary_buffer(_Tp* __p) _NOEXCEPT 1900{ 1901 _VSTD::__libcpp_deallocate_unsized((void*)__p, _LIBCPP_ALIGNOF(_Tp)); 1902} 1903 1904#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 1905template <class _Tp> 1906struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref 1907{ 1908 _Tp* __ptr_; 1909}; 1910 1911template<class _Tp> 1912class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr 1913{ 1914private: 1915 _Tp* __ptr_; 1916public: 1917 typedef _Tp element_type; 1918 1919 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} 1920 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} 1921 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT 1922 : __ptr_(__p.release()) {} 1923 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT 1924 {reset(__p.release()); return *this;} 1925 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT 1926 {reset(__p.release()); return *this;} 1927 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT 1928 {reset(__p.__ptr_); return *this;} 1929 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() _NOEXCEPT {delete __ptr_;} 1930 1931 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const _NOEXCEPT 1932 {return *__ptr_;} 1933 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const _NOEXCEPT {return __ptr_;} 1934 _LIBCPP_INLINE_VISIBILITY _Tp* get() const _NOEXCEPT {return __ptr_;} 1935 _LIBCPP_INLINE_VISIBILITY _Tp* release() _NOEXCEPT 1936 { 1937 _Tp* __t = __ptr_; 1938 __ptr_ = 0; 1939 return __t; 1940 } 1941 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) _NOEXCEPT 1942 { 1943 if (__ptr_ != __p) 1944 delete __ptr_; 1945 __ptr_ = __p; 1946 } 1947 1948 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} 1949 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() _NOEXCEPT 1950 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 1951 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() _NOEXCEPT 1952 {return auto_ptr<_Up>(release());} 1953}; 1954 1955template <> 1956class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> 1957{ 1958public: 1959 typedef void element_type; 1960}; 1961#endif 1962 1963// Tag used to default initialize one or both of the pair's elements. 1964struct __default_init_tag {}; 1965struct __value_init_tag {}; 1966 1967template <class _Tp, int _Idx, 1968 bool _CanBeEmptyBase = 1969 is_empty<_Tp>::value && !__libcpp_is_final<_Tp>::value> 1970struct __compressed_pair_elem { 1971 typedef _Tp _ParamT; 1972 typedef _Tp& reference; 1973 typedef const _Tp& const_reference; 1974 1975 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1976 __compressed_pair_elem(__default_init_tag) {} 1977 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1978 __compressed_pair_elem(__value_init_tag) : __value_() {} 1979 1980 template <class _Up, class = typename enable_if< 1981 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 1982 >::type> 1983 _LIBCPP_INLINE_VISIBILITY 1984 _LIBCPP_CONSTEXPR explicit 1985 __compressed_pair_elem(_Up&& __u) 1986 : __value_(_VSTD::forward<_Up>(__u)) 1987 { 1988 } 1989 1990 1991#ifndef _LIBCPP_CXX03_LANG 1992 template <class... _Args, size_t... _Indexes> 1993 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1994 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 1995 __tuple_indices<_Indexes...>) 1996 : __value_(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 1997#endif 1998 1999 2000 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return __value_; } 2001 _LIBCPP_INLINE_VISIBILITY 2002 const_reference __get() const _NOEXCEPT { return __value_; } 2003 2004private: 2005 _Tp __value_; 2006}; 2007 2008template <class _Tp, int _Idx> 2009struct __compressed_pair_elem<_Tp, _Idx, true> : private _Tp { 2010 typedef _Tp _ParamT; 2011 typedef _Tp& reference; 2012 typedef const _Tp& const_reference; 2013 typedef _Tp __value_type; 2014 2015 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR __compressed_pair_elem() = default; 2016 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2017 __compressed_pair_elem(__default_init_tag) {} 2018 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2019 __compressed_pair_elem(__value_init_tag) : __value_type() {} 2020 2021 template <class _Up, class = typename enable_if< 2022 !is_same<__compressed_pair_elem, typename decay<_Up>::type>::value 2023 >::type> 2024 _LIBCPP_INLINE_VISIBILITY 2025 _LIBCPP_CONSTEXPR explicit 2026 __compressed_pair_elem(_Up&& __u) 2027 : __value_type(_VSTD::forward<_Up>(__u)) 2028 {} 2029 2030#ifndef _LIBCPP_CXX03_LANG 2031 template <class... _Args, size_t... _Indexes> 2032 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2033 __compressed_pair_elem(piecewise_construct_t, tuple<_Args...> __args, 2034 __tuple_indices<_Indexes...>) 2035 : __value_type(_VSTD::forward<_Args>(_VSTD::get<_Indexes>(__args))...) {} 2036#endif 2037 2038 _LIBCPP_INLINE_VISIBILITY reference __get() _NOEXCEPT { return *this; } 2039 _LIBCPP_INLINE_VISIBILITY 2040 const_reference __get() const _NOEXCEPT { return *this; } 2041}; 2042 2043template <class _T1, class _T2> 2044class __compressed_pair : private __compressed_pair_elem<_T1, 0>, 2045 private __compressed_pair_elem<_T2, 1> { 2046 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T1, 0> _Base1; 2047 typedef _LIBCPP_NODEBUG_TYPE __compressed_pair_elem<_T2, 1> _Base2; 2048 2049 // NOTE: This static assert should never fire because __compressed_pair 2050 // is *almost never* used in a scenario where it's possible for T1 == T2. 2051 // (The exception is std::function where it is possible that the function 2052 // object and the allocator have the same type). 2053 static_assert((!is_same<_T1, _T2>::value), 2054 "__compressed_pair cannot be instantated when T1 and T2 are the same type; " 2055 "The current implementation is NOT ABI-compatible with the previous " 2056 "implementation for this configuration"); 2057 2058public: 2059 template <bool _Dummy = true, 2060 class = typename enable_if< 2061 __dependent_type<is_default_constructible<_T1>, _Dummy>::value && 2062 __dependent_type<is_default_constructible<_T2>, _Dummy>::value 2063 >::type 2064 > 2065 _LIBCPP_INLINE_VISIBILITY 2066 _LIBCPP_CONSTEXPR __compressed_pair() : _Base1(__value_init_tag()), _Base2(__value_init_tag()) {} 2067 2068 template <class _U1, class _U2> 2069 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 2070 __compressed_pair(_U1&& __t1, _U2&& __t2) 2071 : _Base1(std::forward<_U1>(__t1)), _Base2(std::forward<_U2>(__t2)) {} 2072 2073#ifndef _LIBCPP_CXX03_LANG 2074 template <class... _Args1, class... _Args2> 2075 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 2076 __compressed_pair(piecewise_construct_t __pc, tuple<_Args1...> __first_args, 2077 tuple<_Args2...> __second_args) 2078 : _Base1(__pc, _VSTD::move(__first_args), 2079 typename __make_tuple_indices<sizeof...(_Args1)>::type()), 2080 _Base2(__pc, _VSTD::move(__second_args), 2081 typename __make_tuple_indices<sizeof...(_Args2)>::type()) {} 2082#endif 2083 2084 _LIBCPP_INLINE_VISIBILITY 2085 typename _Base1::reference first() _NOEXCEPT { 2086 return static_cast<_Base1&>(*this).__get(); 2087 } 2088 2089 _LIBCPP_INLINE_VISIBILITY 2090 typename _Base1::const_reference first() const _NOEXCEPT { 2091 return static_cast<_Base1 const&>(*this).__get(); 2092 } 2093 2094 _LIBCPP_INLINE_VISIBILITY 2095 typename _Base2::reference second() _NOEXCEPT { 2096 return static_cast<_Base2&>(*this).__get(); 2097 } 2098 2099 _LIBCPP_INLINE_VISIBILITY 2100 typename _Base2::const_reference second() const _NOEXCEPT { 2101 return static_cast<_Base2 const&>(*this).__get(); 2102 } 2103 2104 _LIBCPP_INLINE_VISIBILITY 2105 void swap(__compressed_pair& __x) 2106 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2107 __is_nothrow_swappable<_T2>::value) 2108 { 2109 using std::swap; 2110 swap(first(), __x.first()); 2111 swap(second(), __x.second()); 2112 } 2113}; 2114 2115template <class _T1, class _T2> 2116inline _LIBCPP_INLINE_VISIBILITY 2117void swap(__compressed_pair<_T1, _T2>& __x, __compressed_pair<_T1, _T2>& __y) 2118 _NOEXCEPT_(__is_nothrow_swappable<_T1>::value && 2119 __is_nothrow_swappable<_T2>::value) { 2120 __x.swap(__y); 2121} 2122 2123// default_delete 2124 2125template <class _Tp> 2126struct _LIBCPP_TEMPLATE_VIS default_delete { 2127 static_assert(!is_function<_Tp>::value, 2128 "default_delete cannot be instantiated for function types"); 2129#ifndef _LIBCPP_CXX03_LANG 2130 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 2131#else 2132 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2133#endif 2134 template <class _Up> 2135 _LIBCPP_INLINE_VISIBILITY 2136 default_delete(const default_delete<_Up>&, 2137 typename enable_if<is_convertible<_Up*, _Tp*>::value>::type* = 2138 0) _NOEXCEPT {} 2139 2140 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __ptr) const _NOEXCEPT { 2141 static_assert(sizeof(_Tp) > 0, 2142 "default_delete can not delete incomplete type"); 2143 static_assert(!is_void<_Tp>::value, 2144 "default_delete can not delete incomplete type"); 2145 delete __ptr; 2146 } 2147}; 2148 2149template <class _Tp> 2150struct _LIBCPP_TEMPLATE_VIS default_delete<_Tp[]> { 2151private: 2152 template <class _Up> 2153 struct _EnableIfConvertible 2154 : enable_if<is_convertible<_Up(*)[], _Tp(*)[]>::value> {}; 2155 2156public: 2157#ifndef _LIBCPP_CXX03_LANG 2158 _LIBCPP_INLINE_VISIBILITY constexpr default_delete() _NOEXCEPT = default; 2159#else 2160 _LIBCPP_INLINE_VISIBILITY default_delete() {} 2161#endif 2162 2163 template <class _Up> 2164 _LIBCPP_INLINE_VISIBILITY 2165 default_delete(const default_delete<_Up[]>&, 2166 typename _EnableIfConvertible<_Up>::type* = 0) _NOEXCEPT {} 2167 2168 template <class _Up> 2169 _LIBCPP_INLINE_VISIBILITY 2170 typename _EnableIfConvertible<_Up>::type 2171 operator()(_Up* __ptr) const _NOEXCEPT { 2172 static_assert(sizeof(_Tp) > 0, 2173 "default_delete can not delete incomplete type"); 2174 static_assert(!is_void<_Tp>::value, 2175 "default_delete can not delete void type"); 2176 delete[] __ptr; 2177 } 2178}; 2179 2180template <class _Deleter> 2181struct __unique_ptr_deleter_sfinae { 2182 static_assert(!is_reference<_Deleter>::value, "incorrect specialization"); 2183 typedef const _Deleter& __lval_ref_type; 2184 typedef _Deleter&& __good_rval_ref_type; 2185 typedef true_type __enable_rval_overload; 2186}; 2187 2188template <class _Deleter> 2189struct __unique_ptr_deleter_sfinae<_Deleter const&> { 2190 typedef const _Deleter& __lval_ref_type; 2191 typedef const _Deleter&& __bad_rval_ref_type; 2192 typedef false_type __enable_rval_overload; 2193}; 2194 2195template <class _Deleter> 2196struct __unique_ptr_deleter_sfinae<_Deleter&> { 2197 typedef _Deleter& __lval_ref_type; 2198 typedef _Deleter&& __bad_rval_ref_type; 2199 typedef false_type __enable_rval_overload; 2200}; 2201 2202#if defined(_LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI) 2203# define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI __attribute__((trivial_abi)) 2204#else 2205# define _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI 2206#endif 2207 2208template <class _Tp, class _Dp = default_delete<_Tp> > 2209class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS unique_ptr { 2210public: 2211 typedef _Tp element_type; 2212 typedef _Dp deleter_type; 2213 typedef _LIBCPP_NODEBUG_TYPE typename __pointer_type<_Tp, deleter_type>::type pointer; 2214 2215 static_assert(!is_rvalue_reference<deleter_type>::value, 2216 "the specified deleter type cannot be an rvalue reference"); 2217 2218private: 2219 __compressed_pair<pointer, deleter_type> __ptr_; 2220 2221 struct __nat { int __for_bool_; }; 2222 2223 typedef _LIBCPP_NODEBUG_TYPE __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2224 2225 template <bool _Dummy> 2226 using _LValRefType _LIBCPP_NODEBUG_TYPE = 2227 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2228 2229 template <bool _Dummy> 2230 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 2231 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2232 2233 template <bool _Dummy> 2234 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 2235 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2236 2237 template <bool _Dummy, class _Deleter = typename __dependent_type< 2238 __identity<deleter_type>, _Dummy>::type> 2239 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 2240 typename enable_if<is_default_constructible<_Deleter>::value && 2241 !is_pointer<_Deleter>::value>::type; 2242 2243 template <class _ArgType> 2244 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 2245 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2246 2247 template <class _UPtr, class _Up> 2248 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2249 is_convertible<typename _UPtr::pointer, pointer>::value && 2250 !is_array<_Up>::value 2251 >::type; 2252 2253 template <class _UDel> 2254 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2255 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2256 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2257 >::type; 2258 2259 template <class _UDel> 2260 using _EnableIfDeleterAssignable = typename enable_if< 2261 is_assignable<_Dp&, _UDel&&>::value 2262 >::type; 2263 2264public: 2265 template <bool _Dummy = true, 2266 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2267 _LIBCPP_INLINE_VISIBILITY 2268 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2269 2270 template <bool _Dummy = true, 2271 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2272 _LIBCPP_INLINE_VISIBILITY 2273 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2274 2275 template <bool _Dummy = true, 2276 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2277 _LIBCPP_INLINE_VISIBILITY 2278 explicit unique_ptr(pointer __p) _NOEXCEPT : __ptr_(__p, __default_init_tag()) {} 2279 2280 template <bool _Dummy = true, 2281 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 2282 _LIBCPP_INLINE_VISIBILITY 2283 unique_ptr(pointer __p, _LValRefType<_Dummy> __d) _NOEXCEPT 2284 : __ptr_(__p, __d) {} 2285 2286 template <bool _Dummy = true, 2287 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 2288 _LIBCPP_INLINE_VISIBILITY 2289 unique_ptr(pointer __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2290 : __ptr_(__p, _VSTD::move(__d)) { 2291 static_assert(!is_reference<deleter_type>::value, 2292 "rvalue deleter bound to reference"); 2293 } 2294 2295 template <bool _Dummy = true, 2296 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> > > 2297 _LIBCPP_INLINE_VISIBILITY 2298 unique_ptr(pointer __p, _BadRValRefType<_Dummy> __d) = delete; 2299 2300 _LIBCPP_INLINE_VISIBILITY 2301 unique_ptr(unique_ptr&& __u) _NOEXCEPT 2302 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2303 } 2304 2305 template <class _Up, class _Ep, 2306 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2307 class = _EnableIfDeleterConvertible<_Ep> 2308 > 2309 _LIBCPP_INLINE_VISIBILITY 2310 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2311 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) {} 2312 2313#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2314 template <class _Up> 2315 _LIBCPP_INLINE_VISIBILITY 2316 unique_ptr(auto_ptr<_Up>&& __p, 2317 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2318 is_same<_Dp, default_delete<_Tp> >::value, 2319 __nat>::type = __nat()) _NOEXCEPT 2320 : __ptr_(__p.release(), __default_init_tag()) {} 2321#endif 2322 2323 _LIBCPP_INLINE_VISIBILITY 2324 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2325 reset(__u.release()); 2326 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2327 return *this; 2328 } 2329 2330 template <class _Up, class _Ep, 2331 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2332 class = _EnableIfDeleterAssignable<_Ep> 2333 > 2334 _LIBCPP_INLINE_VISIBILITY 2335 unique_ptr& operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2336 reset(__u.release()); 2337 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2338 return *this; 2339 } 2340 2341#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 2342 template <class _Up> 2343 _LIBCPP_INLINE_VISIBILITY 2344 typename enable_if<is_convertible<_Up*, _Tp*>::value && 2345 is_same<_Dp, default_delete<_Tp> >::value, 2346 unique_ptr&>::type 2347 operator=(auto_ptr<_Up> __p) { 2348 reset(__p.release()); 2349 return *this; 2350 } 2351#endif 2352 2353#ifdef _LIBCPP_CXX03_LANG 2354 unique_ptr(unique_ptr const&) = delete; 2355 unique_ptr& operator=(unique_ptr const&) = delete; 2356#endif 2357 2358 2359 _LIBCPP_INLINE_VISIBILITY 2360 ~unique_ptr() { reset(); } 2361 2362 _LIBCPP_INLINE_VISIBILITY 2363 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2364 reset(); 2365 return *this; 2366 } 2367 2368 _LIBCPP_INLINE_VISIBILITY 2369 typename add_lvalue_reference<_Tp>::type 2370 operator*() const { 2371 return *__ptr_.first(); 2372 } 2373 _LIBCPP_INLINE_VISIBILITY 2374 pointer operator->() const _NOEXCEPT { 2375 return __ptr_.first(); 2376 } 2377 _LIBCPP_INLINE_VISIBILITY 2378 pointer get() const _NOEXCEPT { 2379 return __ptr_.first(); 2380 } 2381 _LIBCPP_INLINE_VISIBILITY 2382 deleter_type& get_deleter() _NOEXCEPT { 2383 return __ptr_.second(); 2384 } 2385 _LIBCPP_INLINE_VISIBILITY 2386 const deleter_type& get_deleter() const _NOEXCEPT { 2387 return __ptr_.second(); 2388 } 2389 _LIBCPP_INLINE_VISIBILITY 2390 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2391 return __ptr_.first() != nullptr; 2392 } 2393 2394 _LIBCPP_INLINE_VISIBILITY 2395 pointer release() _NOEXCEPT { 2396 pointer __t = __ptr_.first(); 2397 __ptr_.first() = pointer(); 2398 return __t; 2399 } 2400 2401 _LIBCPP_INLINE_VISIBILITY 2402 void reset(pointer __p = pointer()) _NOEXCEPT { 2403 pointer __tmp = __ptr_.first(); 2404 __ptr_.first() = __p; 2405 if (__tmp) 2406 __ptr_.second()(__tmp); 2407 } 2408 2409 _LIBCPP_INLINE_VISIBILITY 2410 void swap(unique_ptr& __u) _NOEXCEPT { 2411 __ptr_.swap(__u.__ptr_); 2412 } 2413}; 2414 2415 2416template <class _Tp, class _Dp> 2417class _LIBCPP_UNIQUE_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS unique_ptr<_Tp[], _Dp> { 2418public: 2419 typedef _Tp element_type; 2420 typedef _Dp deleter_type; 2421 typedef typename __pointer_type<_Tp, deleter_type>::type pointer; 2422 2423private: 2424 __compressed_pair<pointer, deleter_type> __ptr_; 2425 2426 template <class _From> 2427 struct _CheckArrayPointerConversion : is_same<_From, pointer> {}; 2428 2429 template <class _FromElem> 2430 struct _CheckArrayPointerConversion<_FromElem*> 2431 : integral_constant<bool, 2432 is_same<_FromElem*, pointer>::value || 2433 (is_same<pointer, element_type*>::value && 2434 is_convertible<_FromElem(*)[], element_type(*)[]>::value) 2435 > 2436 {}; 2437 2438 typedef __unique_ptr_deleter_sfinae<_Dp> _DeleterSFINAE; 2439 2440 template <bool _Dummy> 2441 using _LValRefType _LIBCPP_NODEBUG_TYPE = 2442 typename __dependent_type<_DeleterSFINAE, _Dummy>::__lval_ref_type; 2443 2444 template <bool _Dummy> 2445 using _GoodRValRefType _LIBCPP_NODEBUG_TYPE = 2446 typename __dependent_type<_DeleterSFINAE, _Dummy>::__good_rval_ref_type; 2447 2448 template <bool _Dummy> 2449 using _BadRValRefType _LIBCPP_NODEBUG_TYPE = 2450 typename __dependent_type<_DeleterSFINAE, _Dummy>::__bad_rval_ref_type; 2451 2452 template <bool _Dummy, class _Deleter = typename __dependent_type< 2453 __identity<deleter_type>, _Dummy>::type> 2454 using _EnableIfDeleterDefaultConstructible _LIBCPP_NODEBUG_TYPE = 2455 typename enable_if<is_default_constructible<_Deleter>::value && 2456 !is_pointer<_Deleter>::value>::type; 2457 2458 template <class _ArgType> 2459 using _EnableIfDeleterConstructible _LIBCPP_NODEBUG_TYPE = 2460 typename enable_if<is_constructible<deleter_type, _ArgType>::value>::type; 2461 2462 template <class _Pp> 2463 using _EnableIfPointerConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2464 _CheckArrayPointerConversion<_Pp>::value 2465 >::type; 2466 2467 template <class _UPtr, class _Up, 2468 class _ElemT = typename _UPtr::element_type> 2469 using _EnableIfMoveConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2470 is_array<_Up>::value && 2471 is_same<pointer, element_type*>::value && 2472 is_same<typename _UPtr::pointer, _ElemT*>::value && 2473 is_convertible<_ElemT(*)[], element_type(*)[]>::value 2474 >::type; 2475 2476 template <class _UDel> 2477 using _EnableIfDeleterConvertible _LIBCPP_NODEBUG_TYPE = typename enable_if< 2478 (is_reference<_Dp>::value && is_same<_Dp, _UDel>::value) || 2479 (!is_reference<_Dp>::value && is_convertible<_UDel, _Dp>::value) 2480 >::type; 2481 2482 template <class _UDel> 2483 using _EnableIfDeleterAssignable _LIBCPP_NODEBUG_TYPE = typename enable_if< 2484 is_assignable<_Dp&, _UDel&&>::value 2485 >::type; 2486 2487public: 2488 template <bool _Dummy = true, 2489 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2490 _LIBCPP_INLINE_VISIBILITY 2491 _LIBCPP_CONSTEXPR unique_ptr() _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2492 2493 template <bool _Dummy = true, 2494 class = _EnableIfDeleterDefaultConstructible<_Dummy> > 2495 _LIBCPP_INLINE_VISIBILITY 2496 _LIBCPP_CONSTEXPR unique_ptr(nullptr_t) _NOEXCEPT : __ptr_(pointer(), __default_init_tag()) {} 2497 2498 template <class _Pp, bool _Dummy = true, 2499 class = _EnableIfDeleterDefaultConstructible<_Dummy>, 2500 class = _EnableIfPointerConvertible<_Pp> > 2501 _LIBCPP_INLINE_VISIBILITY 2502 explicit unique_ptr(_Pp __p) _NOEXCEPT 2503 : __ptr_(__p, __default_init_tag()) {} 2504 2505 template <class _Pp, bool _Dummy = true, 2506 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> >, 2507 class = _EnableIfPointerConvertible<_Pp> > 2508 _LIBCPP_INLINE_VISIBILITY 2509 unique_ptr(_Pp __p, _LValRefType<_Dummy> __d) _NOEXCEPT 2510 : __ptr_(__p, __d) {} 2511 2512 template <bool _Dummy = true, 2513 class = _EnableIfDeleterConstructible<_LValRefType<_Dummy> > > 2514 _LIBCPP_INLINE_VISIBILITY 2515 unique_ptr(nullptr_t, _LValRefType<_Dummy> __d) _NOEXCEPT 2516 : __ptr_(nullptr, __d) {} 2517 2518 template <class _Pp, bool _Dummy = true, 2519 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> >, 2520 class = _EnableIfPointerConvertible<_Pp> > 2521 _LIBCPP_INLINE_VISIBILITY 2522 unique_ptr(_Pp __p, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2523 : __ptr_(__p, _VSTD::move(__d)) { 2524 static_assert(!is_reference<deleter_type>::value, 2525 "rvalue deleter bound to reference"); 2526 } 2527 2528 template <bool _Dummy = true, 2529 class = _EnableIfDeleterConstructible<_GoodRValRefType<_Dummy> > > 2530 _LIBCPP_INLINE_VISIBILITY 2531 unique_ptr(nullptr_t, _GoodRValRefType<_Dummy> __d) _NOEXCEPT 2532 : __ptr_(nullptr, _VSTD::move(__d)) { 2533 static_assert(!is_reference<deleter_type>::value, 2534 "rvalue deleter bound to reference"); 2535 } 2536 2537 template <class _Pp, bool _Dummy = true, 2538 class = _EnableIfDeleterConstructible<_BadRValRefType<_Dummy> >, 2539 class = _EnableIfPointerConvertible<_Pp> > 2540 _LIBCPP_INLINE_VISIBILITY 2541 unique_ptr(_Pp __p, _BadRValRefType<_Dummy> __d) = delete; 2542 2543 _LIBCPP_INLINE_VISIBILITY 2544 unique_ptr(unique_ptr&& __u) _NOEXCEPT 2545 : __ptr_(__u.release(), _VSTD::forward<deleter_type>(__u.get_deleter())) { 2546 } 2547 2548 _LIBCPP_INLINE_VISIBILITY 2549 unique_ptr& operator=(unique_ptr&& __u) _NOEXCEPT { 2550 reset(__u.release()); 2551 __ptr_.second() = _VSTD::forward<deleter_type>(__u.get_deleter()); 2552 return *this; 2553 } 2554 2555 template <class _Up, class _Ep, 2556 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2557 class = _EnableIfDeleterConvertible<_Ep> 2558 > 2559 _LIBCPP_INLINE_VISIBILITY 2560 unique_ptr(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT 2561 : __ptr_(__u.release(), _VSTD::forward<_Ep>(__u.get_deleter())) { 2562 } 2563 2564 template <class _Up, class _Ep, 2565 class = _EnableIfMoveConvertible<unique_ptr<_Up, _Ep>, _Up>, 2566 class = _EnableIfDeleterAssignable<_Ep> 2567 > 2568 _LIBCPP_INLINE_VISIBILITY 2569 unique_ptr& 2570 operator=(unique_ptr<_Up, _Ep>&& __u) _NOEXCEPT { 2571 reset(__u.release()); 2572 __ptr_.second() = _VSTD::forward<_Ep>(__u.get_deleter()); 2573 return *this; 2574 } 2575 2576#ifdef _LIBCPP_CXX03_LANG 2577 unique_ptr(unique_ptr const&) = delete; 2578 unique_ptr& operator=(unique_ptr const&) = delete; 2579#endif 2580 2581public: 2582 _LIBCPP_INLINE_VISIBILITY 2583 ~unique_ptr() { reset(); } 2584 2585 _LIBCPP_INLINE_VISIBILITY 2586 unique_ptr& operator=(nullptr_t) _NOEXCEPT { 2587 reset(); 2588 return *this; 2589 } 2590 2591 _LIBCPP_INLINE_VISIBILITY 2592 typename add_lvalue_reference<_Tp>::type 2593 operator[](size_t __i) const { 2594 return __ptr_.first()[__i]; 2595 } 2596 _LIBCPP_INLINE_VISIBILITY 2597 pointer get() const _NOEXCEPT { 2598 return __ptr_.first(); 2599 } 2600 2601 _LIBCPP_INLINE_VISIBILITY 2602 deleter_type& get_deleter() _NOEXCEPT { 2603 return __ptr_.second(); 2604 } 2605 2606 _LIBCPP_INLINE_VISIBILITY 2607 const deleter_type& get_deleter() const _NOEXCEPT { 2608 return __ptr_.second(); 2609 } 2610 _LIBCPP_INLINE_VISIBILITY 2611 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2612 return __ptr_.first() != nullptr; 2613 } 2614 2615 _LIBCPP_INLINE_VISIBILITY 2616 pointer release() _NOEXCEPT { 2617 pointer __t = __ptr_.first(); 2618 __ptr_.first() = pointer(); 2619 return __t; 2620 } 2621 2622 template <class _Pp> 2623 _LIBCPP_INLINE_VISIBILITY 2624 typename enable_if< 2625 _CheckArrayPointerConversion<_Pp>::value 2626 >::type 2627 reset(_Pp __p) _NOEXCEPT { 2628 pointer __tmp = __ptr_.first(); 2629 __ptr_.first() = __p; 2630 if (__tmp) 2631 __ptr_.second()(__tmp); 2632 } 2633 2634 _LIBCPP_INLINE_VISIBILITY 2635 void reset(nullptr_t = nullptr) _NOEXCEPT { 2636 pointer __tmp = __ptr_.first(); 2637 __ptr_.first() = nullptr; 2638 if (__tmp) 2639 __ptr_.second()(__tmp); 2640 } 2641 2642 _LIBCPP_INLINE_VISIBILITY 2643 void swap(unique_ptr& __u) _NOEXCEPT { 2644 __ptr_.swap(__u.__ptr_); 2645 } 2646 2647}; 2648 2649template <class _Tp, class _Dp> 2650inline _LIBCPP_INLINE_VISIBILITY 2651typename enable_if< 2652 __is_swappable<_Dp>::value, 2653 void 2654>::type 2655swap(unique_ptr<_Tp, _Dp>& __x, unique_ptr<_Tp, _Dp>& __y) _NOEXCEPT {__x.swap(__y);} 2656 2657template <class _T1, class _D1, class _T2, class _D2> 2658inline _LIBCPP_INLINE_VISIBILITY 2659bool 2660operator==(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __x.get() == __y.get();} 2661 2662template <class _T1, class _D1, class _T2, class _D2> 2663inline _LIBCPP_INLINE_VISIBILITY 2664bool 2665operator!=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x == __y);} 2666 2667template <class _T1, class _D1, class _T2, class _D2> 2668inline _LIBCPP_INLINE_VISIBILITY 2669bool 2670operator< (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) 2671{ 2672 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2673 typedef typename unique_ptr<_T2, _D2>::pointer _P2; 2674 typedef typename common_type<_P1, _P2>::type _Vp; 2675 return less<_Vp>()(__x.get(), __y.get()); 2676} 2677 2678template <class _T1, class _D1, class _T2, class _D2> 2679inline _LIBCPP_INLINE_VISIBILITY 2680bool 2681operator> (const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return __y < __x;} 2682 2683template <class _T1, class _D1, class _T2, class _D2> 2684inline _LIBCPP_INLINE_VISIBILITY 2685bool 2686operator<=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__y < __x);} 2687 2688template <class _T1, class _D1, class _T2, class _D2> 2689inline _LIBCPP_INLINE_VISIBILITY 2690bool 2691operator>=(const unique_ptr<_T1, _D1>& __x, const unique_ptr<_T2, _D2>& __y) {return !(__x < __y);} 2692 2693template <class _T1, class _D1> 2694inline _LIBCPP_INLINE_VISIBILITY 2695bool 2696operator==(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2697{ 2698 return !__x; 2699} 2700 2701template <class _T1, class _D1> 2702inline _LIBCPP_INLINE_VISIBILITY 2703bool 2704operator==(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2705{ 2706 return !__x; 2707} 2708 2709template <class _T1, class _D1> 2710inline _LIBCPP_INLINE_VISIBILITY 2711bool 2712operator!=(const unique_ptr<_T1, _D1>& __x, nullptr_t) _NOEXCEPT 2713{ 2714 return static_cast<bool>(__x); 2715} 2716 2717template <class _T1, class _D1> 2718inline _LIBCPP_INLINE_VISIBILITY 2719bool 2720operator!=(nullptr_t, const unique_ptr<_T1, _D1>& __x) _NOEXCEPT 2721{ 2722 return static_cast<bool>(__x); 2723} 2724 2725template <class _T1, class _D1> 2726inline _LIBCPP_INLINE_VISIBILITY 2727bool 2728operator<(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2729{ 2730 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2731 return less<_P1>()(__x.get(), nullptr); 2732} 2733 2734template <class _T1, class _D1> 2735inline _LIBCPP_INLINE_VISIBILITY 2736bool 2737operator<(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2738{ 2739 typedef typename unique_ptr<_T1, _D1>::pointer _P1; 2740 return less<_P1>()(nullptr, __x.get()); 2741} 2742 2743template <class _T1, class _D1> 2744inline _LIBCPP_INLINE_VISIBILITY 2745bool 2746operator>(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2747{ 2748 return nullptr < __x; 2749} 2750 2751template <class _T1, class _D1> 2752inline _LIBCPP_INLINE_VISIBILITY 2753bool 2754operator>(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2755{ 2756 return __x < nullptr; 2757} 2758 2759template <class _T1, class _D1> 2760inline _LIBCPP_INLINE_VISIBILITY 2761bool 2762operator<=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2763{ 2764 return !(nullptr < __x); 2765} 2766 2767template <class _T1, class _D1> 2768inline _LIBCPP_INLINE_VISIBILITY 2769bool 2770operator<=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2771{ 2772 return !(__x < nullptr); 2773} 2774 2775template <class _T1, class _D1> 2776inline _LIBCPP_INLINE_VISIBILITY 2777bool 2778operator>=(const unique_ptr<_T1, _D1>& __x, nullptr_t) 2779{ 2780 return !(__x < nullptr); 2781} 2782 2783template <class _T1, class _D1> 2784inline _LIBCPP_INLINE_VISIBILITY 2785bool 2786operator>=(nullptr_t, const unique_ptr<_T1, _D1>& __x) 2787{ 2788 return !(nullptr < __x); 2789} 2790 2791#if _LIBCPP_STD_VER > 11 2792 2793template<class _Tp> 2794struct __unique_if 2795{ 2796 typedef unique_ptr<_Tp> __unique_single; 2797}; 2798 2799template<class _Tp> 2800struct __unique_if<_Tp[]> 2801{ 2802 typedef unique_ptr<_Tp[]> __unique_array_unknown_bound; 2803}; 2804 2805template<class _Tp, size_t _Np> 2806struct __unique_if<_Tp[_Np]> 2807{ 2808 typedef void __unique_array_known_bound; 2809}; 2810 2811template<class _Tp, class... _Args> 2812inline _LIBCPP_INLINE_VISIBILITY 2813typename __unique_if<_Tp>::__unique_single 2814make_unique(_Args&&... __args) 2815{ 2816 return unique_ptr<_Tp>(new _Tp(_VSTD::forward<_Args>(__args)...)); 2817} 2818 2819template<class _Tp> 2820inline _LIBCPP_INLINE_VISIBILITY 2821typename __unique_if<_Tp>::__unique_array_unknown_bound 2822make_unique(size_t __n) 2823{ 2824 typedef typename remove_extent<_Tp>::type _Up; 2825 return unique_ptr<_Tp>(new _Up[__n]()); 2826} 2827 2828template<class _Tp, class... _Args> 2829 typename __unique_if<_Tp>::__unique_array_known_bound 2830 make_unique(_Args&&...) = delete; 2831 2832#endif // _LIBCPP_STD_VER > 11 2833 2834template <class _Tp, class _Dp> 2835#ifdef _LIBCPP_CXX03_LANG 2836struct _LIBCPP_TEMPLATE_VIS hash<unique_ptr<_Tp, _Dp> > 2837#else 2838struct _LIBCPP_TEMPLATE_VIS hash<__enable_hash_helper< 2839 unique_ptr<_Tp, _Dp>, typename unique_ptr<_Tp, _Dp>::pointer> > 2840#endif 2841{ 2842 typedef unique_ptr<_Tp, _Dp> argument_type; 2843 typedef size_t result_type; 2844 _LIBCPP_INLINE_VISIBILITY 2845 result_type operator()(const argument_type& __ptr) const 2846 { 2847 typedef typename argument_type::pointer pointer; 2848 return hash<pointer>()(__ptr.get()); 2849 } 2850}; 2851 2852struct __destruct_n 2853{ 2854private: 2855 size_t __size_; 2856 2857 template <class _Tp> 2858 _LIBCPP_INLINE_VISIBILITY void __process(_Tp* __p, false_type) _NOEXCEPT 2859 {for (size_t __i = 0; __i < __size_; ++__i, ++__p) __p->~_Tp();} 2860 2861 template <class _Tp> 2862 _LIBCPP_INLINE_VISIBILITY void __process(_Tp*, true_type) _NOEXCEPT 2863 {} 2864 2865 _LIBCPP_INLINE_VISIBILITY void __incr(false_type) _NOEXCEPT 2866 {++__size_;} 2867 _LIBCPP_INLINE_VISIBILITY void __incr(true_type) _NOEXCEPT 2868 {} 2869 2870 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, false_type) _NOEXCEPT 2871 {__size_ = __s;} 2872 _LIBCPP_INLINE_VISIBILITY void __set(size_t, true_type) _NOEXCEPT 2873 {} 2874public: 2875 _LIBCPP_INLINE_VISIBILITY explicit __destruct_n(size_t __s) _NOEXCEPT 2876 : __size_(__s) {} 2877 2878 template <class _Tp> 2879 _LIBCPP_INLINE_VISIBILITY void __incr(_Tp*) _NOEXCEPT 2880 {__incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2881 2882 template <class _Tp> 2883 _LIBCPP_INLINE_VISIBILITY void __set(size_t __s, _Tp*) _NOEXCEPT 2884 {__set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2885 2886 template <class _Tp> 2887 _LIBCPP_INLINE_VISIBILITY void operator()(_Tp* __p) _NOEXCEPT 2888 {__process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());} 2889}; 2890 2891template <class _Alloc> 2892class __allocator_destructor 2893{ 2894 typedef _LIBCPP_NODEBUG_TYPE allocator_traits<_Alloc> __alloc_traits; 2895public: 2896 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::pointer pointer; 2897 typedef _LIBCPP_NODEBUG_TYPE typename __alloc_traits::size_type size_type; 2898private: 2899 _Alloc& __alloc_; 2900 size_type __s_; 2901public: 2902 _LIBCPP_INLINE_VISIBILITY __allocator_destructor(_Alloc& __a, size_type __s) 2903 _NOEXCEPT 2904 : __alloc_(__a), __s_(__s) {} 2905 _LIBCPP_INLINE_VISIBILITY 2906 void operator()(pointer __p) _NOEXCEPT 2907 {__alloc_traits::deallocate(__alloc_, __p, __s_);} 2908}; 2909 2910template <class _InputIterator, class _ForwardIterator> 2911_ForwardIterator 2912uninitialized_copy(_InputIterator __f, _InputIterator __l, _ForwardIterator __r) 2913{ 2914 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2915#ifndef _LIBCPP_NO_EXCEPTIONS 2916 _ForwardIterator __s = __r; 2917 try 2918 { 2919#endif 2920 for (; __f != __l; ++__f, (void) ++__r) 2921 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 2922#ifndef _LIBCPP_NO_EXCEPTIONS 2923 } 2924 catch (...) 2925 { 2926 for (; __s != __r; ++__s) 2927 __s->~value_type(); 2928 throw; 2929 } 2930#endif 2931 return __r; 2932} 2933 2934template <class _InputIterator, class _Size, class _ForwardIterator> 2935_ForwardIterator 2936uninitialized_copy_n(_InputIterator __f, _Size __n, _ForwardIterator __r) 2937{ 2938 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2939#ifndef _LIBCPP_NO_EXCEPTIONS 2940 _ForwardIterator __s = __r; 2941 try 2942 { 2943#endif 2944 for (; __n > 0; ++__f, (void) ++__r, (void) --__n) 2945 ::new (static_cast<void*>(_VSTD::addressof(*__r))) value_type(*__f); 2946#ifndef _LIBCPP_NO_EXCEPTIONS 2947 } 2948 catch (...) 2949 { 2950 for (; __s != __r; ++__s) 2951 __s->~value_type(); 2952 throw; 2953 } 2954#endif 2955 return __r; 2956} 2957 2958template <class _ForwardIterator, class _Tp> 2959void 2960uninitialized_fill(_ForwardIterator __f, _ForwardIterator __l, const _Tp& __x) 2961{ 2962 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2963#ifndef _LIBCPP_NO_EXCEPTIONS 2964 _ForwardIterator __s = __f; 2965 try 2966 { 2967#endif 2968 for (; __f != __l; ++__f) 2969 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 2970#ifndef _LIBCPP_NO_EXCEPTIONS 2971 } 2972 catch (...) 2973 { 2974 for (; __s != __f; ++__s) 2975 __s->~value_type(); 2976 throw; 2977 } 2978#endif 2979} 2980 2981template <class _ForwardIterator, class _Size, class _Tp> 2982_ForwardIterator 2983uninitialized_fill_n(_ForwardIterator __f, _Size __n, const _Tp& __x) 2984{ 2985 typedef typename iterator_traits<_ForwardIterator>::value_type value_type; 2986#ifndef _LIBCPP_NO_EXCEPTIONS 2987 _ForwardIterator __s = __f; 2988 try 2989 { 2990#endif 2991 for (; __n > 0; ++__f, (void) --__n) 2992 ::new (static_cast<void*>(_VSTD::addressof(*__f))) value_type(__x); 2993#ifndef _LIBCPP_NO_EXCEPTIONS 2994 } 2995 catch (...) 2996 { 2997 for (; __s != __f; ++__s) 2998 __s->~value_type(); 2999 throw; 3000 } 3001#endif 3002 return __f; 3003} 3004 3005#if _LIBCPP_STD_VER > 14 3006 3007template <class _ForwardIterator> 3008inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 3009void destroy(_ForwardIterator __first, _ForwardIterator __last) { 3010 for (; __first != __last; ++__first) 3011 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3012} 3013 3014template <class _ForwardIterator, class _Size> 3015inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 3016_ForwardIterator destroy_n(_ForwardIterator __first, _Size __n) { 3017 for (; __n > 0; (void)++__first, --__n) 3018 _VSTD::destroy_at(_VSTD::addressof(*__first)); 3019 return __first; 3020} 3021 3022template <class _ForwardIterator> 3023inline _LIBCPP_INLINE_VISIBILITY 3024void uninitialized_default_construct(_ForwardIterator __first, _ForwardIterator __last) { 3025 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3026 auto __idx = __first; 3027#ifndef _LIBCPP_NO_EXCEPTIONS 3028 try { 3029#endif 3030 for (; __idx != __last; ++__idx) 3031 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3032#ifndef _LIBCPP_NO_EXCEPTIONS 3033 } catch (...) { 3034 _VSTD::destroy(__first, __idx); 3035 throw; 3036 } 3037#endif 3038} 3039 3040template <class _ForwardIterator, class _Size> 3041inline _LIBCPP_INLINE_VISIBILITY 3042_ForwardIterator uninitialized_default_construct_n(_ForwardIterator __first, _Size __n) { 3043 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3044 auto __idx = __first; 3045#ifndef _LIBCPP_NO_EXCEPTIONS 3046 try { 3047#endif 3048 for (; __n > 0; (void)++__idx, --__n) 3049 ::new((void*)_VSTD::addressof(*__idx)) _Vt; 3050 return __idx; 3051#ifndef _LIBCPP_NO_EXCEPTIONS 3052 } catch (...) { 3053 _VSTD::destroy(__first, __idx); 3054 throw; 3055 } 3056#endif 3057} 3058 3059 3060template <class _ForwardIterator> 3061inline _LIBCPP_INLINE_VISIBILITY 3062void uninitialized_value_construct(_ForwardIterator __first, _ForwardIterator __last) { 3063 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3064 auto __idx = __first; 3065#ifndef _LIBCPP_NO_EXCEPTIONS 3066 try { 3067#endif 3068 for (; __idx != __last; ++__idx) 3069 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3070#ifndef _LIBCPP_NO_EXCEPTIONS 3071 } catch (...) { 3072 _VSTD::destroy(__first, __idx); 3073 throw; 3074 } 3075#endif 3076} 3077 3078template <class _ForwardIterator, class _Size> 3079inline _LIBCPP_INLINE_VISIBILITY 3080_ForwardIterator uninitialized_value_construct_n(_ForwardIterator __first, _Size __n) { 3081 using _Vt = typename iterator_traits<_ForwardIterator>::value_type; 3082 auto __idx = __first; 3083#ifndef _LIBCPP_NO_EXCEPTIONS 3084 try { 3085#endif 3086 for (; __n > 0; (void)++__idx, --__n) 3087 ::new((void*)_VSTD::addressof(*__idx)) _Vt(); 3088 return __idx; 3089#ifndef _LIBCPP_NO_EXCEPTIONS 3090 } catch (...) { 3091 _VSTD::destroy(__first, __idx); 3092 throw; 3093 } 3094#endif 3095} 3096 3097 3098template <class _InputIt, class _ForwardIt> 3099inline _LIBCPP_INLINE_VISIBILITY 3100_ForwardIt uninitialized_move(_InputIt __first, _InputIt __last, _ForwardIt __first_res) { 3101 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3102 auto __idx = __first_res; 3103#ifndef _LIBCPP_NO_EXCEPTIONS 3104 try { 3105#endif 3106 for (; __first != __last; (void)++__idx, ++__first) 3107 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3108 return __idx; 3109#ifndef _LIBCPP_NO_EXCEPTIONS 3110 } catch (...) { 3111 _VSTD::destroy(__first_res, __idx); 3112 throw; 3113 } 3114#endif 3115} 3116 3117template <class _InputIt, class _Size, class _ForwardIt> 3118inline _LIBCPP_INLINE_VISIBILITY 3119pair<_InputIt, _ForwardIt> 3120uninitialized_move_n(_InputIt __first, _Size __n, _ForwardIt __first_res) { 3121 using _Vt = typename iterator_traits<_ForwardIt>::value_type; 3122 auto __idx = __first_res; 3123#ifndef _LIBCPP_NO_EXCEPTIONS 3124 try { 3125#endif 3126 for (; __n > 0; ++__idx, (void)++__first, --__n) 3127 ::new((void*)_VSTD::addressof(*__idx)) _Vt(std::move(*__first)); 3128 return {__first, __idx}; 3129#ifndef _LIBCPP_NO_EXCEPTIONS 3130 } catch (...) { 3131 _VSTD::destroy(__first_res, __idx); 3132 throw; 3133 } 3134#endif 3135} 3136 3137 3138#endif // _LIBCPP_STD_VER > 14 3139 3140// NOTE: Relaxed and acq/rel atomics (for increment and decrement respectively) 3141// should be sufficient for thread safety. 3142// See https://bugs.llvm.org/show_bug.cgi?id=22803 3143#if defined(__clang__) && __has_builtin(__atomic_add_fetch) \ 3144 && defined(__ATOMIC_RELAXED) \ 3145 && defined(__ATOMIC_ACQ_REL) 3146# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3147#elif defined(_LIBCPP_COMPILER_GCC) 3148# define _LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT 3149#endif 3150 3151template <class _Tp> 3152inline _LIBCPP_INLINE_VISIBILITY _Tp 3153__libcpp_atomic_refcount_increment(_Tp& __t) _NOEXCEPT 3154{ 3155#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3156 return __atomic_add_fetch(&__t, 1, __ATOMIC_RELAXED); 3157#else 3158 return __t += 1; 3159#endif 3160} 3161 3162template <class _Tp> 3163inline _LIBCPP_INLINE_VISIBILITY _Tp 3164__libcpp_atomic_refcount_decrement(_Tp& __t) _NOEXCEPT 3165{ 3166#if defined(_LIBCPP_HAS_BUILTIN_ATOMIC_SUPPORT) && !defined(_LIBCPP_HAS_NO_THREADS) 3167 return __atomic_add_fetch(&__t, -1, __ATOMIC_ACQ_REL); 3168#else 3169 return __t -= 1; 3170#endif 3171} 3172 3173class _LIBCPP_EXCEPTION_ABI bad_weak_ptr 3174 : public std::exception 3175{ 3176public: 3177 bad_weak_ptr() _NOEXCEPT = default; 3178 bad_weak_ptr(const bad_weak_ptr&) _NOEXCEPT = default; 3179 virtual ~bad_weak_ptr() _NOEXCEPT; 3180 virtual const char* what() const _NOEXCEPT; 3181}; 3182 3183_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY 3184void __throw_bad_weak_ptr() 3185{ 3186#ifndef _LIBCPP_NO_EXCEPTIONS 3187 throw bad_weak_ptr(); 3188#else 3189 _VSTD::abort(); 3190#endif 3191} 3192 3193template<class _Tp> class _LIBCPP_TEMPLATE_VIS weak_ptr; 3194 3195class _LIBCPP_TYPE_VIS __shared_count 3196{ 3197 __shared_count(const __shared_count&); 3198 __shared_count& operator=(const __shared_count&); 3199 3200protected: 3201 long __shared_owners_; 3202 virtual ~__shared_count(); 3203private: 3204 virtual void __on_zero_shared() _NOEXCEPT = 0; 3205 3206public: 3207 _LIBCPP_INLINE_VISIBILITY 3208 explicit __shared_count(long __refs = 0) _NOEXCEPT 3209 : __shared_owners_(__refs) {} 3210 3211#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3212 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3213 void __add_shared() _NOEXCEPT; 3214 bool __release_shared() _NOEXCEPT; 3215#else 3216 _LIBCPP_INLINE_VISIBILITY 3217 void __add_shared() _NOEXCEPT { 3218 __libcpp_atomic_refcount_increment(__shared_owners_); 3219 } 3220 _LIBCPP_INLINE_VISIBILITY 3221 bool __release_shared() _NOEXCEPT { 3222 if (__libcpp_atomic_refcount_decrement(__shared_owners_) == -1) { 3223 __on_zero_shared(); 3224 return true; 3225 } 3226 return false; 3227 } 3228#endif 3229 _LIBCPP_INLINE_VISIBILITY 3230 long use_count() const _NOEXCEPT { 3231 return __libcpp_relaxed_load(&__shared_owners_) + 1; 3232 } 3233}; 3234 3235class _LIBCPP_TYPE_VIS __shared_weak_count 3236 : private __shared_count 3237{ 3238 long __shared_weak_owners_; 3239 3240public: 3241 _LIBCPP_INLINE_VISIBILITY 3242 explicit __shared_weak_count(long __refs = 0) _NOEXCEPT 3243 : __shared_count(__refs), 3244 __shared_weak_owners_(__refs) {} 3245protected: 3246 virtual ~__shared_weak_count(); 3247 3248public: 3249#if defined(_LIBCPP_BUILDING_LIBRARY) && \ 3250 defined(_LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS) 3251 void __add_shared() _NOEXCEPT; 3252 void __add_weak() _NOEXCEPT; 3253 void __release_shared() _NOEXCEPT; 3254#else 3255 _LIBCPP_INLINE_VISIBILITY 3256 void __add_shared() _NOEXCEPT { 3257 __shared_count::__add_shared(); 3258 } 3259 _LIBCPP_INLINE_VISIBILITY 3260 void __add_weak() _NOEXCEPT { 3261 __libcpp_atomic_refcount_increment(__shared_weak_owners_); 3262 } 3263 _LIBCPP_INLINE_VISIBILITY 3264 void __release_shared() _NOEXCEPT { 3265 if (__shared_count::__release_shared()) 3266 __release_weak(); 3267 } 3268#endif 3269 void __release_weak() _NOEXCEPT; 3270 _LIBCPP_INLINE_VISIBILITY 3271 long use_count() const _NOEXCEPT {return __shared_count::use_count();} 3272 __shared_weak_count* lock() _NOEXCEPT; 3273 3274 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3275private: 3276 virtual void __on_zero_shared_weak() _NOEXCEPT = 0; 3277}; 3278 3279template <class _Tp, class _Dp, class _Alloc> 3280class __shared_ptr_pointer 3281 : public __shared_weak_count 3282{ 3283 __compressed_pair<__compressed_pair<_Tp, _Dp>, _Alloc> __data_; 3284public: 3285 _LIBCPP_INLINE_VISIBILITY 3286 __shared_ptr_pointer(_Tp __p, _Dp __d, _Alloc __a) 3287 : __data_(__compressed_pair<_Tp, _Dp>(__p, _VSTD::move(__d)), _VSTD::move(__a)) {} 3288 3289#ifndef _LIBCPP_NO_RTTI 3290 virtual const void* __get_deleter(const type_info&) const _NOEXCEPT; 3291#endif 3292 3293private: 3294 virtual void __on_zero_shared() _NOEXCEPT; 3295 virtual void __on_zero_shared_weak() _NOEXCEPT; 3296}; 3297 3298#ifndef _LIBCPP_NO_RTTI 3299 3300template <class _Tp, class _Dp, class _Alloc> 3301const void* 3302__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__get_deleter(const type_info& __t) const _NOEXCEPT 3303{ 3304 return __t == typeid(_Dp) ? _VSTD::addressof(__data_.first().second()) : nullptr; 3305} 3306 3307#endif // _LIBCPP_NO_RTTI 3308 3309template <class _Tp, class _Dp, class _Alloc> 3310void 3311__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared() _NOEXCEPT 3312{ 3313 __data_.first().second()(__data_.first().first()); 3314 __data_.first().second().~_Dp(); 3315} 3316 3317template <class _Tp, class _Dp, class _Alloc> 3318void 3319__shared_ptr_pointer<_Tp, _Dp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3320{ 3321 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_pointer>::type _Al; 3322 typedef allocator_traits<_Al> _ATraits; 3323 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3324 3325 _Al __a(__data_.second()); 3326 __data_.second().~_Alloc(); 3327 __a.deallocate(_PTraits::pointer_to(*this), 1); 3328} 3329 3330template <class _Tp, class _Alloc> 3331class __shared_ptr_emplace 3332 : public __shared_weak_count 3333{ 3334 __compressed_pair<_Alloc, _Tp> __data_; 3335public: 3336 3337 _LIBCPP_INLINE_VISIBILITY 3338 __shared_ptr_emplace(_Alloc __a) 3339 : __data_(_VSTD::move(__a), __value_init_tag()) {} 3340 3341#ifndef _LIBCPP_CXX03_LANG 3342 template <class ..._Args> 3343 _LIBCPP_INLINE_VISIBILITY 3344 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 3345 : __data_(piecewise_construct, _VSTD::forward_as_tuple(__a), 3346 _VSTD::forward_as_tuple(_VSTD::forward<_Args>(__args)...)) {} 3347#else 3348 template <class ..._Args> 3349 _LIBCPP_INLINE_VISIBILITY 3350 __shared_ptr_emplace(_Alloc __a, _Args&& ...__args) 3351 : __data_(__a, _Tp(_VSTD::forward<_Args>(__args)...)) {} 3352#endif 3353 3354private: 3355 virtual void __on_zero_shared() _NOEXCEPT; 3356 virtual void __on_zero_shared_weak() _NOEXCEPT; 3357public: 3358 _LIBCPP_INLINE_VISIBILITY 3359 _Tp* get() _NOEXCEPT {return _VSTD::addressof(__data_.second());} 3360}; 3361 3362template <class _Tp, class _Alloc> 3363void 3364__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared() _NOEXCEPT 3365{ 3366 __data_.second().~_Tp(); 3367} 3368 3369template <class _Tp, class _Alloc> 3370void 3371__shared_ptr_emplace<_Tp, _Alloc>::__on_zero_shared_weak() _NOEXCEPT 3372{ 3373 typedef typename __allocator_traits_rebind<_Alloc, __shared_ptr_emplace>::type _Al; 3374 typedef allocator_traits<_Al> _ATraits; 3375 typedef pointer_traits<typename _ATraits::pointer> _PTraits; 3376 _Al __a(__data_.first()); 3377 __data_.first().~_Alloc(); 3378 __a.deallocate(_PTraits::pointer_to(*this), 1); 3379} 3380 3381struct __shared_ptr_dummy_rebind_allocator_type; 3382template <> 3383class _LIBCPP_TEMPLATE_VIS allocator<__shared_ptr_dummy_rebind_allocator_type> 3384{ 3385public: 3386 template <class _Other> 3387 struct rebind 3388 { 3389 typedef allocator<_Other> other; 3390 }; 3391}; 3392 3393template<class _Tp> class _LIBCPP_TEMPLATE_VIS enable_shared_from_this; 3394 3395template<class _Tp, class _Up> 3396struct __compatible_with 3397#if _LIBCPP_STD_VER > 14 3398 : is_convertible<remove_extent_t<_Tp>*, remove_extent_t<_Up>*> {}; 3399#else 3400 : is_convertible<_Tp*, _Up*> {}; 3401#endif // _LIBCPP_STD_VER > 14 3402 3403#if defined(_LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI) 3404# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI __attribute__((trivial_abi)) 3405#else 3406# define _LIBCPP_SHARED_PTR_TRIVIAL_ABI 3407#endif 3408 3409template<class _Tp> 3410class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS shared_ptr 3411{ 3412public: 3413#if _LIBCPP_STD_VER > 14 3414 typedef weak_ptr<_Tp> weak_type; 3415 typedef remove_extent_t<_Tp> element_type; 3416#else 3417 typedef _Tp element_type; 3418#endif 3419 3420private: 3421 element_type* __ptr_; 3422 __shared_weak_count* __cntrl_; 3423 3424 struct __nat {int __for_bool_;}; 3425public: 3426 _LIBCPP_INLINE_VISIBILITY 3427 _LIBCPP_CONSTEXPR shared_ptr() _NOEXCEPT; 3428 _LIBCPP_INLINE_VISIBILITY 3429 _LIBCPP_CONSTEXPR shared_ptr(nullptr_t) _NOEXCEPT; 3430 template<class _Yp> 3431 explicit shared_ptr(_Yp* __p, 3432 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3433 template<class _Yp, class _Dp> 3434 shared_ptr(_Yp* __p, _Dp __d, 3435 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3436 template<class _Yp, class _Dp, class _Alloc> 3437 shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3438 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()); 3439 template <class _Dp> shared_ptr(nullptr_t __p, _Dp __d); 3440 template <class _Dp, class _Alloc> shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a); 3441 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(const shared_ptr<_Yp>& __r, element_type* __p) _NOEXCEPT; 3442 _LIBCPP_INLINE_VISIBILITY 3443 shared_ptr(const shared_ptr& __r) _NOEXCEPT; 3444 template<class _Yp> 3445 _LIBCPP_INLINE_VISIBILITY 3446 shared_ptr(const shared_ptr<_Yp>& __r, 3447 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 3448 _NOEXCEPT; 3449 _LIBCPP_INLINE_VISIBILITY 3450 shared_ptr(shared_ptr&& __r) _NOEXCEPT; 3451 template<class _Yp> _LIBCPP_INLINE_VISIBILITY shared_ptr(shared_ptr<_Yp>&& __r, 3452 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type = __nat()) 3453 _NOEXCEPT; 3454 template<class _Yp> explicit shared_ptr(const weak_ptr<_Yp>& __r, 3455 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type= __nat()); 3456#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3457 template<class _Yp> 3458 shared_ptr(auto_ptr<_Yp>&& __r, 3459 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type = __nat()); 3460#endif 3461 template <class _Yp, class _Dp> 3462 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3463 typename enable_if 3464 < 3465 !is_lvalue_reference<_Dp>::value && 3466 !is_array<_Yp>::value && 3467 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3468 __nat 3469 >::type = __nat()); 3470 template <class _Yp, class _Dp> 3471 shared_ptr(unique_ptr<_Yp, _Dp>&&, 3472 typename enable_if 3473 < 3474 is_lvalue_reference<_Dp>::value && 3475 !is_array<_Yp>::value && 3476 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3477 __nat 3478 >::type = __nat()); 3479 3480 ~shared_ptr(); 3481 3482 _LIBCPP_INLINE_VISIBILITY 3483 shared_ptr& operator=(const shared_ptr& __r) _NOEXCEPT; 3484 template<class _Yp> 3485 typename enable_if 3486 < 3487 __compatible_with<_Yp, element_type>::value, 3488 shared_ptr& 3489 >::type 3490 _LIBCPP_INLINE_VISIBILITY 3491 operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT; 3492 _LIBCPP_INLINE_VISIBILITY 3493 shared_ptr& operator=(shared_ptr&& __r) _NOEXCEPT; 3494 template<class _Yp> 3495 typename enable_if 3496 < 3497 __compatible_with<_Yp, element_type>::value, 3498 shared_ptr& 3499 >::type 3500 _LIBCPP_INLINE_VISIBILITY 3501 operator=(shared_ptr<_Yp>&& __r); 3502#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3503 template<class _Yp> 3504 _LIBCPP_INLINE_VISIBILITY 3505 typename enable_if 3506 < 3507 !is_array<_Yp>::value && 3508 is_convertible<_Yp*, element_type*>::value, 3509 shared_ptr 3510 >::type& 3511 operator=(auto_ptr<_Yp>&& __r); 3512#endif 3513 template <class _Yp, class _Dp> 3514 typename enable_if 3515 < 3516 !is_array<_Yp>::value && 3517 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3518 shared_ptr& 3519 >::type 3520 _LIBCPP_INLINE_VISIBILITY 3521 operator=(unique_ptr<_Yp, _Dp>&& __r); 3522 3523 _LIBCPP_INLINE_VISIBILITY 3524 void swap(shared_ptr& __r) _NOEXCEPT; 3525 _LIBCPP_INLINE_VISIBILITY 3526 void reset() _NOEXCEPT; 3527 template<class _Yp> 3528 typename enable_if 3529 < 3530 __compatible_with<_Yp, element_type>::value, 3531 void 3532 >::type 3533 _LIBCPP_INLINE_VISIBILITY 3534 reset(_Yp* __p); 3535 template<class _Yp, class _Dp> 3536 typename enable_if 3537 < 3538 __compatible_with<_Yp, element_type>::value, 3539 void 3540 >::type 3541 _LIBCPP_INLINE_VISIBILITY 3542 reset(_Yp* __p, _Dp __d); 3543 template<class _Yp, class _Dp, class _Alloc> 3544 typename enable_if 3545 < 3546 __compatible_with<_Yp, element_type>::value, 3547 void 3548 >::type 3549 _LIBCPP_INLINE_VISIBILITY 3550 reset(_Yp* __p, _Dp __d, _Alloc __a); 3551 3552 _LIBCPP_INLINE_VISIBILITY 3553 element_type* get() const _NOEXCEPT {return __ptr_;} 3554 _LIBCPP_INLINE_VISIBILITY 3555 typename add_lvalue_reference<element_type>::type operator*() const _NOEXCEPT 3556 {return *__ptr_;} 3557 _LIBCPP_INLINE_VISIBILITY 3558 element_type* operator->() const _NOEXCEPT 3559 { 3560 static_assert(!_VSTD::is_array<_Tp>::value, 3561 "std::shared_ptr<T>::operator-> is only valid when T is not an array type."); 3562 return __ptr_; 3563 } 3564 _LIBCPP_INLINE_VISIBILITY 3565 long use_count() const _NOEXCEPT {return __cntrl_ ? __cntrl_->use_count() : 0;} 3566 _LIBCPP_INLINE_VISIBILITY 3567 bool unique() const _NOEXCEPT {return use_count() == 1;} 3568 _LIBCPP_INLINE_VISIBILITY 3569 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT {return get() != 0;} 3570 template <class _Up> 3571 _LIBCPP_INLINE_VISIBILITY 3572 bool owner_before(shared_ptr<_Up> const& __p) const _NOEXCEPT 3573 {return __cntrl_ < __p.__cntrl_;} 3574 template <class _Up> 3575 _LIBCPP_INLINE_VISIBILITY 3576 bool owner_before(weak_ptr<_Up> const& __p) const _NOEXCEPT 3577 {return __cntrl_ < __p.__cntrl_;} 3578 _LIBCPP_INLINE_VISIBILITY 3579 bool 3580 __owner_equivalent(const shared_ptr& __p) const 3581 {return __cntrl_ == __p.__cntrl_;} 3582 3583#if _LIBCPP_STD_VER > 14 3584 typename add_lvalue_reference<element_type>::type 3585 _LIBCPP_INLINE_VISIBILITY 3586 operator[](ptrdiff_t __i) const 3587 { 3588 static_assert(_VSTD::is_array<_Tp>::value, 3589 "std::shared_ptr<T>::operator[] is only valid when T is an array type."); 3590 return __ptr_[__i]; 3591 } 3592#endif 3593 3594#ifndef _LIBCPP_NO_RTTI 3595 template <class _Dp> 3596 _LIBCPP_INLINE_VISIBILITY 3597 _Dp* __get_deleter() const _NOEXCEPT 3598 {return static_cast<_Dp*>(__cntrl_ 3599 ? const_cast<void *>(__cntrl_->__get_deleter(typeid(_Dp))) 3600 : nullptr);} 3601#endif // _LIBCPP_NO_RTTI 3602 3603 template<class _Yp, class _CntrlBlk> 3604 static shared_ptr<_Tp> 3605 __create_with_control_block(_Yp* __p, _CntrlBlk* __cntrl) _NOEXCEPT 3606 { 3607 shared_ptr<_Tp> __r; 3608 __r.__ptr_ = __p; 3609 __r.__cntrl_ = __cntrl; 3610 __r.__enable_weak_this(__r.__ptr_, __r.__ptr_); 3611 return __r; 3612 } 3613 3614private: 3615 template <class _Yp, bool = is_function<_Yp>::value> 3616 struct __shared_ptr_default_allocator 3617 { 3618 typedef allocator<_Yp> type; 3619 }; 3620 3621 template <class _Yp> 3622 struct __shared_ptr_default_allocator<_Yp, true> 3623 { 3624 typedef allocator<__shared_ptr_dummy_rebind_allocator_type> type; 3625 }; 3626 3627 template <class _Yp, class _OrigPtr> 3628 _LIBCPP_INLINE_VISIBILITY 3629 typename enable_if<is_convertible<_OrigPtr*, 3630 const enable_shared_from_this<_Yp>* 3631 >::value, 3632 void>::type 3633 __enable_weak_this(const enable_shared_from_this<_Yp>* __e, 3634 _OrigPtr* __ptr) _NOEXCEPT 3635 { 3636 typedef typename remove_cv<_Yp>::type _RawYp; 3637 if (__e && __e->__weak_this_.expired()) 3638 { 3639 __e->__weak_this_ = shared_ptr<_RawYp>(*this, 3640 const_cast<_RawYp*>(static_cast<const _Yp*>(__ptr))); 3641 } 3642 } 3643 3644 _LIBCPP_INLINE_VISIBILITY void __enable_weak_this(...) _NOEXCEPT {} 3645 3646 template <class, class _Yp> 3647 struct __shared_ptr_default_delete 3648 : default_delete<_Yp> {}; 3649 3650 template <class _Yp, class _Un, size_t _Sz> 3651 struct __shared_ptr_default_delete<_Yp[_Sz], _Un> 3652 : default_delete<_Yp[]> {}; 3653 3654 template <class _Yp, class _Un> 3655 struct __shared_ptr_default_delete<_Yp[], _Un> 3656 : default_delete<_Yp[]> {}; 3657 3658 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 3659 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 3660}; 3661 3662#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 3663template<class _Tp> 3664shared_ptr(weak_ptr<_Tp>) -> shared_ptr<_Tp>; 3665template<class _Tp, class _Dp> 3666shared_ptr(unique_ptr<_Tp, _Dp>) -> shared_ptr<_Tp>; 3667#endif 3668 3669template<class _Tp> 3670inline 3671_LIBCPP_CONSTEXPR 3672shared_ptr<_Tp>::shared_ptr() _NOEXCEPT 3673 : __ptr_(0), 3674 __cntrl_(0) 3675{ 3676} 3677 3678template<class _Tp> 3679inline 3680_LIBCPP_CONSTEXPR 3681shared_ptr<_Tp>::shared_ptr(nullptr_t) _NOEXCEPT 3682 : __ptr_(0), 3683 __cntrl_(0) 3684{ 3685} 3686 3687template<class _Tp> 3688template<class _Yp> 3689shared_ptr<_Tp>::shared_ptr(_Yp* __p, 3690 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3691 : __ptr_(__p) 3692{ 3693 unique_ptr<_Yp> __hold(__p); 3694 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3695 typedef __shared_ptr_pointer<_Yp*, __shared_ptr_default_delete<_Tp, _Yp>, _AllocT > _CntrlBlk; 3696 __cntrl_ = new _CntrlBlk(__p, __shared_ptr_default_delete<_Tp, _Yp>(), _AllocT()); 3697 __hold.release(); 3698 __enable_weak_this(__p, __p); 3699} 3700 3701template<class _Tp> 3702template<class _Yp, class _Dp> 3703shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, 3704 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3705 : __ptr_(__p) 3706{ 3707#ifndef _LIBCPP_NO_EXCEPTIONS 3708 try 3709 { 3710#endif // _LIBCPP_NO_EXCEPTIONS 3711 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3712 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 3713 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3714 __enable_weak_this(__p, __p); 3715#ifndef _LIBCPP_NO_EXCEPTIONS 3716 } 3717 catch (...) 3718 { 3719 __d(__p); 3720 throw; 3721 } 3722#endif // _LIBCPP_NO_EXCEPTIONS 3723} 3724 3725template<class _Tp> 3726template<class _Dp> 3727shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d) 3728 : __ptr_(0) 3729{ 3730#ifndef _LIBCPP_NO_EXCEPTIONS 3731 try 3732 { 3733#endif // _LIBCPP_NO_EXCEPTIONS 3734 typedef typename __shared_ptr_default_allocator<_Tp>::type _AllocT; 3735 typedef __shared_ptr_pointer<nullptr_t, _Dp, _AllocT > _CntrlBlk; 3736 __cntrl_ = new _CntrlBlk(__p, __d, _AllocT()); 3737#ifndef _LIBCPP_NO_EXCEPTIONS 3738 } 3739 catch (...) 3740 { 3741 __d(__p); 3742 throw; 3743 } 3744#endif // _LIBCPP_NO_EXCEPTIONS 3745} 3746 3747template<class _Tp> 3748template<class _Yp, class _Dp, class _Alloc> 3749shared_ptr<_Tp>::shared_ptr(_Yp* __p, _Dp __d, _Alloc __a, 3750 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3751 : __ptr_(__p) 3752{ 3753#ifndef _LIBCPP_NO_EXCEPTIONS 3754 try 3755 { 3756#endif // _LIBCPP_NO_EXCEPTIONS 3757 typedef __shared_ptr_pointer<_Yp*, _Dp, _Alloc> _CntrlBlk; 3758 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3759 typedef __allocator_destructor<_A2> _D2; 3760 _A2 __a2(__a); 3761 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 3762 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 3763 _CntrlBlk(__p, __d, __a); 3764 __cntrl_ = _VSTD::addressof(*__hold2.release()); 3765 __enable_weak_this(__p, __p); 3766#ifndef _LIBCPP_NO_EXCEPTIONS 3767 } 3768 catch (...) 3769 { 3770 __d(__p); 3771 throw; 3772 } 3773#endif // _LIBCPP_NO_EXCEPTIONS 3774} 3775 3776template<class _Tp> 3777template<class _Dp, class _Alloc> 3778shared_ptr<_Tp>::shared_ptr(nullptr_t __p, _Dp __d, _Alloc __a) 3779 : __ptr_(0) 3780{ 3781#ifndef _LIBCPP_NO_EXCEPTIONS 3782 try 3783 { 3784#endif // _LIBCPP_NO_EXCEPTIONS 3785 typedef __shared_ptr_pointer<nullptr_t, _Dp, _Alloc> _CntrlBlk; 3786 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 3787 typedef __allocator_destructor<_A2> _D2; 3788 _A2 __a2(__a); 3789 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 3790 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 3791 _CntrlBlk(__p, __d, __a); 3792 __cntrl_ = _VSTD::addressof(*__hold2.release()); 3793#ifndef _LIBCPP_NO_EXCEPTIONS 3794 } 3795 catch (...) 3796 { 3797 __d(__p); 3798 throw; 3799 } 3800#endif // _LIBCPP_NO_EXCEPTIONS 3801} 3802 3803template<class _Tp> 3804template<class _Yp> 3805inline 3806shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, element_type *__p) _NOEXCEPT 3807 : __ptr_(__p), 3808 __cntrl_(__r.__cntrl_) 3809{ 3810 if (__cntrl_) 3811 __cntrl_->__add_shared(); 3812} 3813 3814template<class _Tp> 3815inline 3816shared_ptr<_Tp>::shared_ptr(const shared_ptr& __r) _NOEXCEPT 3817 : __ptr_(__r.__ptr_), 3818 __cntrl_(__r.__cntrl_) 3819{ 3820 if (__cntrl_) 3821 __cntrl_->__add_shared(); 3822} 3823 3824template<class _Tp> 3825template<class _Yp> 3826inline 3827shared_ptr<_Tp>::shared_ptr(const shared_ptr<_Yp>& __r, 3828 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3829 _NOEXCEPT 3830 : __ptr_(__r.__ptr_), 3831 __cntrl_(__r.__cntrl_) 3832{ 3833 if (__cntrl_) 3834 __cntrl_->__add_shared(); 3835} 3836 3837template<class _Tp> 3838inline 3839shared_ptr<_Tp>::shared_ptr(shared_ptr&& __r) _NOEXCEPT 3840 : __ptr_(__r.__ptr_), 3841 __cntrl_(__r.__cntrl_) 3842{ 3843 __r.__ptr_ = 0; 3844 __r.__cntrl_ = 0; 3845} 3846 3847template<class _Tp> 3848template<class _Yp> 3849inline 3850shared_ptr<_Tp>::shared_ptr(shared_ptr<_Yp>&& __r, 3851 typename enable_if<__compatible_with<_Yp, element_type>::value, __nat>::type) 3852 _NOEXCEPT 3853 : __ptr_(__r.__ptr_), 3854 __cntrl_(__r.__cntrl_) 3855{ 3856 __r.__ptr_ = 0; 3857 __r.__cntrl_ = 0; 3858} 3859 3860#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3861template<class _Tp> 3862template<class _Yp> 3863shared_ptr<_Tp>::shared_ptr(auto_ptr<_Yp>&& __r, 3864 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 3865 : __ptr_(__r.get()) 3866{ 3867 typedef __shared_ptr_pointer<_Yp*, default_delete<_Yp>, allocator<_Yp> > _CntrlBlk; 3868 __cntrl_ = new _CntrlBlk(__r.get(), default_delete<_Yp>(), allocator<_Yp>()); 3869 __enable_weak_this(__r.get(), __r.get()); 3870 __r.release(); 3871} 3872#endif 3873 3874template<class _Tp> 3875template <class _Yp, class _Dp> 3876shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 3877 typename enable_if 3878 < 3879 !is_lvalue_reference<_Dp>::value && 3880 !is_array<_Yp>::value && 3881 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3882 __nat 3883 >::type) 3884 : __ptr_(__r.get()) 3885{ 3886#if _LIBCPP_STD_VER > 11 3887 if (__ptr_ == nullptr) 3888 __cntrl_ = nullptr; 3889 else 3890#endif 3891 { 3892 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3893 typedef __shared_ptr_pointer<_Yp*, _Dp, _AllocT > _CntrlBlk; 3894 __cntrl_ = new _CntrlBlk(__r.get(), __r.get_deleter(), _AllocT()); 3895 __enable_weak_this(__r.get(), __r.get()); 3896 } 3897 __r.release(); 3898} 3899 3900template<class _Tp> 3901template <class _Yp, class _Dp> 3902shared_ptr<_Tp>::shared_ptr(unique_ptr<_Yp, _Dp>&& __r, 3903 typename enable_if 3904 < 3905 is_lvalue_reference<_Dp>::value && 3906 !is_array<_Yp>::value && 3907 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, element_type*>::value, 3908 __nat 3909 >::type) 3910 : __ptr_(__r.get()) 3911{ 3912#if _LIBCPP_STD_VER > 11 3913 if (__ptr_ == nullptr) 3914 __cntrl_ = nullptr; 3915 else 3916#endif 3917 { 3918 typedef typename __shared_ptr_default_allocator<_Yp>::type _AllocT; 3919 typedef __shared_ptr_pointer<_Yp*, 3920 reference_wrapper<typename remove_reference<_Dp>::type>, 3921 _AllocT > _CntrlBlk; 3922 __cntrl_ = new _CntrlBlk(__r.get(), _VSTD::ref(__r.get_deleter()), _AllocT()); 3923 __enable_weak_this(__r.get(), __r.get()); 3924 } 3925 __r.release(); 3926} 3927 3928template<class _Tp> 3929shared_ptr<_Tp>::~shared_ptr() 3930{ 3931 if (__cntrl_) 3932 __cntrl_->__release_shared(); 3933} 3934 3935template<class _Tp> 3936inline 3937shared_ptr<_Tp>& 3938shared_ptr<_Tp>::operator=(const shared_ptr& __r) _NOEXCEPT 3939{ 3940 shared_ptr(__r).swap(*this); 3941 return *this; 3942} 3943 3944template<class _Tp> 3945template<class _Yp> 3946inline 3947typename enable_if 3948< 3949 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3950 shared_ptr<_Tp>& 3951>::type 3952shared_ptr<_Tp>::operator=(const shared_ptr<_Yp>& __r) _NOEXCEPT 3953{ 3954 shared_ptr(__r).swap(*this); 3955 return *this; 3956} 3957 3958template<class _Tp> 3959inline 3960shared_ptr<_Tp>& 3961shared_ptr<_Tp>::operator=(shared_ptr&& __r) _NOEXCEPT 3962{ 3963 shared_ptr(_VSTD::move(__r)).swap(*this); 3964 return *this; 3965} 3966 3967template<class _Tp> 3968template<class _Yp> 3969inline 3970typename enable_if 3971< 3972 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 3973 shared_ptr<_Tp>& 3974>::type 3975shared_ptr<_Tp>::operator=(shared_ptr<_Yp>&& __r) 3976{ 3977 shared_ptr(_VSTD::move(__r)).swap(*this); 3978 return *this; 3979} 3980 3981#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 3982template<class _Tp> 3983template<class _Yp> 3984inline 3985typename enable_if 3986< 3987 !is_array<_Yp>::value && 3988 is_convertible<_Yp*, typename shared_ptr<_Tp>::element_type*>::value, 3989 shared_ptr<_Tp> 3990>::type& 3991shared_ptr<_Tp>::operator=(auto_ptr<_Yp>&& __r) 3992{ 3993 shared_ptr(_VSTD::move(__r)).swap(*this); 3994 return *this; 3995} 3996#endif 3997 3998template<class _Tp> 3999template <class _Yp, class _Dp> 4000inline 4001typename enable_if 4002< 4003 !is_array<_Yp>::value && 4004 is_convertible<typename unique_ptr<_Yp, _Dp>::pointer, 4005 typename shared_ptr<_Tp>::element_type*>::value, 4006 shared_ptr<_Tp>& 4007>::type 4008shared_ptr<_Tp>::operator=(unique_ptr<_Yp, _Dp>&& __r) 4009{ 4010 shared_ptr(_VSTD::move(__r)).swap(*this); 4011 return *this; 4012} 4013 4014template<class _Tp> 4015inline 4016void 4017shared_ptr<_Tp>::swap(shared_ptr& __r) _NOEXCEPT 4018{ 4019 _VSTD::swap(__ptr_, __r.__ptr_); 4020 _VSTD::swap(__cntrl_, __r.__cntrl_); 4021} 4022 4023template<class _Tp> 4024inline 4025void 4026shared_ptr<_Tp>::reset() _NOEXCEPT 4027{ 4028 shared_ptr().swap(*this); 4029} 4030 4031template<class _Tp> 4032template<class _Yp> 4033inline 4034typename enable_if 4035< 4036 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4037 void 4038>::type 4039shared_ptr<_Tp>::reset(_Yp* __p) 4040{ 4041 shared_ptr(__p).swap(*this); 4042} 4043 4044template<class _Tp> 4045template<class _Yp, class _Dp> 4046inline 4047typename enable_if 4048< 4049 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4050 void 4051>::type 4052shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d) 4053{ 4054 shared_ptr(__p, __d).swap(*this); 4055} 4056 4057template<class _Tp> 4058template<class _Yp, class _Dp, class _Alloc> 4059inline 4060typename enable_if 4061< 4062 __compatible_with<_Yp, typename shared_ptr<_Tp>::element_type>::value, 4063 void 4064>::type 4065shared_ptr<_Tp>::reset(_Yp* __p, _Dp __d, _Alloc __a) 4066{ 4067 shared_ptr(__p, __d, __a).swap(*this); 4068} 4069 4070template<class _Tp, class ..._Args> 4071inline _LIBCPP_INLINE_VISIBILITY 4072typename enable_if 4073< 4074 !is_array<_Tp>::value, 4075 shared_ptr<_Tp> 4076>::type 4077make_shared(_Args&& ...__args) 4078{ 4079 static_assert(is_constructible<_Tp, _Args...>::value, "Can't construct object in make_shared"); 4080 typedef __shared_ptr_emplace<_Tp, allocator<_Tp> > _CntrlBlk; 4081 typedef allocator<_CntrlBlk> _A2; 4082 typedef __allocator_destructor<_A2> _D2; 4083 4084 _A2 __a2; 4085 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4086 ::new(__hold2.get()) _CntrlBlk(__a2, _VSTD::forward<_Args>(__args)...); 4087 4088 _Tp *__ptr = __hold2.get()->get(); 4089 return shared_ptr<_Tp>::__create_with_control_block(__ptr, __hold2.release()); 4090} 4091 4092template<class _Tp, class _Alloc, class ..._Args> 4093inline _LIBCPP_INLINE_VISIBILITY 4094typename enable_if 4095< 4096 !is_array<_Tp>::value, 4097 shared_ptr<_Tp> 4098>::type 4099allocate_shared(const _Alloc& __a, _Args&& ...__args) 4100{ 4101 static_assert( is_constructible<_Tp, _Args...>::value, "Can't construct object in allocate_shared"); 4102 4103 typedef __shared_ptr_emplace<_Tp, _Alloc> _CntrlBlk; 4104 typedef typename __allocator_traits_rebind<_Alloc, _CntrlBlk>::type _A2; 4105 typedef __allocator_destructor<_A2> _D2; 4106 4107 _A2 __a2(__a); 4108 unique_ptr<_CntrlBlk, _D2> __hold2(__a2.allocate(1), _D2(__a2, 1)); 4109 ::new(static_cast<void*>(_VSTD::addressof(*__hold2.get()))) 4110 _CntrlBlk(__a, _VSTD::forward<_Args>(__args)...); 4111 4112 typename shared_ptr<_Tp>::element_type *__p = __hold2.get()->get(); 4113 return shared_ptr<_Tp>::__create_with_control_block(__p, _VSTD::addressof(*__hold2.release())); 4114} 4115 4116template<class _Tp, class _Up> 4117inline _LIBCPP_INLINE_VISIBILITY 4118bool 4119operator==(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4120{ 4121 return __x.get() == __y.get(); 4122} 4123 4124template<class _Tp, class _Up> 4125inline _LIBCPP_INLINE_VISIBILITY 4126bool 4127operator!=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4128{ 4129 return !(__x == __y); 4130} 4131 4132template<class _Tp, class _Up> 4133inline _LIBCPP_INLINE_VISIBILITY 4134bool 4135operator<(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4136{ 4137#if _LIBCPP_STD_VER <= 11 4138 typedef typename common_type<_Tp*, _Up*>::type _Vp; 4139 return less<_Vp>()(__x.get(), __y.get()); 4140#else 4141 return less<>()(__x.get(), __y.get()); 4142#endif 4143 4144} 4145 4146template<class _Tp, class _Up> 4147inline _LIBCPP_INLINE_VISIBILITY 4148bool 4149operator>(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4150{ 4151 return __y < __x; 4152} 4153 4154template<class _Tp, class _Up> 4155inline _LIBCPP_INLINE_VISIBILITY 4156bool 4157operator<=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4158{ 4159 return !(__y < __x); 4160} 4161 4162template<class _Tp, class _Up> 4163inline _LIBCPP_INLINE_VISIBILITY 4164bool 4165operator>=(const shared_ptr<_Tp>& __x, const shared_ptr<_Up>& __y) _NOEXCEPT 4166{ 4167 return !(__x < __y); 4168} 4169 4170template<class _Tp> 4171inline _LIBCPP_INLINE_VISIBILITY 4172bool 4173operator==(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4174{ 4175 return !__x; 4176} 4177 4178template<class _Tp> 4179inline _LIBCPP_INLINE_VISIBILITY 4180bool 4181operator==(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4182{ 4183 return !__x; 4184} 4185 4186template<class _Tp> 4187inline _LIBCPP_INLINE_VISIBILITY 4188bool 4189operator!=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4190{ 4191 return static_cast<bool>(__x); 4192} 4193 4194template<class _Tp> 4195inline _LIBCPP_INLINE_VISIBILITY 4196bool 4197operator!=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4198{ 4199 return static_cast<bool>(__x); 4200} 4201 4202template<class _Tp> 4203inline _LIBCPP_INLINE_VISIBILITY 4204bool 4205operator<(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4206{ 4207 return less<_Tp*>()(__x.get(), nullptr); 4208} 4209 4210template<class _Tp> 4211inline _LIBCPP_INLINE_VISIBILITY 4212bool 4213operator<(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4214{ 4215 return less<_Tp*>()(nullptr, __x.get()); 4216} 4217 4218template<class _Tp> 4219inline _LIBCPP_INLINE_VISIBILITY 4220bool 4221operator>(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4222{ 4223 return nullptr < __x; 4224} 4225 4226template<class _Tp> 4227inline _LIBCPP_INLINE_VISIBILITY 4228bool 4229operator>(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4230{ 4231 return __x < nullptr; 4232} 4233 4234template<class _Tp> 4235inline _LIBCPP_INLINE_VISIBILITY 4236bool 4237operator<=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4238{ 4239 return !(nullptr < __x); 4240} 4241 4242template<class _Tp> 4243inline _LIBCPP_INLINE_VISIBILITY 4244bool 4245operator<=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4246{ 4247 return !(__x < nullptr); 4248} 4249 4250template<class _Tp> 4251inline _LIBCPP_INLINE_VISIBILITY 4252bool 4253operator>=(const shared_ptr<_Tp>& __x, nullptr_t) _NOEXCEPT 4254{ 4255 return !(__x < nullptr); 4256} 4257 4258template<class _Tp> 4259inline _LIBCPP_INLINE_VISIBILITY 4260bool 4261operator>=(nullptr_t, const shared_ptr<_Tp>& __x) _NOEXCEPT 4262{ 4263 return !(nullptr < __x); 4264} 4265 4266template<class _Tp> 4267inline _LIBCPP_INLINE_VISIBILITY 4268void 4269swap(shared_ptr<_Tp>& __x, shared_ptr<_Tp>& __y) _NOEXCEPT 4270{ 4271 __x.swap(__y); 4272} 4273 4274template<class _Tp, class _Up> 4275inline _LIBCPP_INLINE_VISIBILITY 4276shared_ptr<_Tp> 4277static_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4278{ 4279 return shared_ptr<_Tp>(__r, 4280 static_cast< 4281 typename shared_ptr<_Tp>::element_type*>(__r.get())); 4282} 4283 4284template<class _Tp, class _Up> 4285inline _LIBCPP_INLINE_VISIBILITY 4286shared_ptr<_Tp> 4287dynamic_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4288{ 4289 typedef typename shared_ptr<_Tp>::element_type _ET; 4290 _ET* __p = dynamic_cast<_ET*>(__r.get()); 4291 return __p ? shared_ptr<_Tp>(__r, __p) : shared_ptr<_Tp>(); 4292} 4293 4294template<class _Tp, class _Up> 4295shared_ptr<_Tp> 4296const_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4297{ 4298 typedef typename shared_ptr<_Tp>::element_type _RTp; 4299 return shared_ptr<_Tp>(__r, const_cast<_RTp*>(__r.get())); 4300} 4301 4302template<class _Tp, class _Up> 4303shared_ptr<_Tp> 4304reinterpret_pointer_cast(const shared_ptr<_Up>& __r) _NOEXCEPT 4305{ 4306 return shared_ptr<_Tp>(__r, 4307 reinterpret_cast< 4308 typename shared_ptr<_Tp>::element_type*>(__r.get())); 4309} 4310 4311#ifndef _LIBCPP_NO_RTTI 4312 4313template<class _Dp, class _Tp> 4314inline _LIBCPP_INLINE_VISIBILITY 4315_Dp* 4316get_deleter(const shared_ptr<_Tp>& __p) _NOEXCEPT 4317{ 4318 return __p.template __get_deleter<_Dp>(); 4319} 4320 4321#endif // _LIBCPP_NO_RTTI 4322 4323template<class _Tp> 4324class _LIBCPP_SHARED_PTR_TRIVIAL_ABI _LIBCPP_TEMPLATE_VIS weak_ptr 4325{ 4326public: 4327 typedef _Tp element_type; 4328private: 4329 element_type* __ptr_; 4330 __shared_weak_count* __cntrl_; 4331 4332public: 4333 _LIBCPP_INLINE_VISIBILITY 4334 _LIBCPP_CONSTEXPR weak_ptr() _NOEXCEPT; 4335 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(shared_ptr<_Yp> const& __r, 4336 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4337 _NOEXCEPT; 4338 _LIBCPP_INLINE_VISIBILITY 4339 weak_ptr(weak_ptr const& __r) _NOEXCEPT; 4340 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp> const& __r, 4341 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4342 _NOEXCEPT; 4343 4344 _LIBCPP_INLINE_VISIBILITY 4345 weak_ptr(weak_ptr&& __r) _NOEXCEPT; 4346 template<class _Yp> _LIBCPP_INLINE_VISIBILITY weak_ptr(weak_ptr<_Yp>&& __r, 4347 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type = 0) 4348 _NOEXCEPT; 4349 ~weak_ptr(); 4350 4351 _LIBCPP_INLINE_VISIBILITY 4352 weak_ptr& operator=(weak_ptr const& __r) _NOEXCEPT; 4353 template<class _Yp> 4354 typename enable_if 4355 < 4356 is_convertible<_Yp*, element_type*>::value, 4357 weak_ptr& 4358 >::type 4359 _LIBCPP_INLINE_VISIBILITY 4360 operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT; 4361 4362 _LIBCPP_INLINE_VISIBILITY 4363 weak_ptr& operator=(weak_ptr&& __r) _NOEXCEPT; 4364 template<class _Yp> 4365 typename enable_if 4366 < 4367 is_convertible<_Yp*, element_type*>::value, 4368 weak_ptr& 4369 >::type 4370 _LIBCPP_INLINE_VISIBILITY 4371 operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT; 4372 4373 template<class _Yp> 4374 typename enable_if 4375 < 4376 is_convertible<_Yp*, element_type*>::value, 4377 weak_ptr& 4378 >::type 4379 _LIBCPP_INLINE_VISIBILITY 4380 operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT; 4381 4382 _LIBCPP_INLINE_VISIBILITY 4383 void swap(weak_ptr& __r) _NOEXCEPT; 4384 _LIBCPP_INLINE_VISIBILITY 4385 void reset() _NOEXCEPT; 4386 4387 _LIBCPP_INLINE_VISIBILITY 4388 long use_count() const _NOEXCEPT 4389 {return __cntrl_ ? __cntrl_->use_count() : 0;} 4390 _LIBCPP_INLINE_VISIBILITY 4391 bool expired() const _NOEXCEPT 4392 {return __cntrl_ == 0 || __cntrl_->use_count() == 0;} 4393 shared_ptr<_Tp> lock() const _NOEXCEPT; 4394 template<class _Up> 4395 _LIBCPP_INLINE_VISIBILITY 4396 bool owner_before(const shared_ptr<_Up>& __r) const _NOEXCEPT 4397 {return __cntrl_ < __r.__cntrl_;} 4398 template<class _Up> 4399 _LIBCPP_INLINE_VISIBILITY 4400 bool owner_before(const weak_ptr<_Up>& __r) const _NOEXCEPT 4401 {return __cntrl_ < __r.__cntrl_;} 4402 4403 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS weak_ptr; 4404 template <class _Up> friend class _LIBCPP_TEMPLATE_VIS shared_ptr; 4405}; 4406 4407#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 4408template<class _Tp> 4409weak_ptr(shared_ptr<_Tp>) -> weak_ptr<_Tp>; 4410#endif 4411 4412template<class _Tp> 4413inline 4414_LIBCPP_CONSTEXPR 4415weak_ptr<_Tp>::weak_ptr() _NOEXCEPT 4416 : __ptr_(0), 4417 __cntrl_(0) 4418{ 4419} 4420 4421template<class _Tp> 4422inline 4423weak_ptr<_Tp>::weak_ptr(weak_ptr const& __r) _NOEXCEPT 4424 : __ptr_(__r.__ptr_), 4425 __cntrl_(__r.__cntrl_) 4426{ 4427 if (__cntrl_) 4428 __cntrl_->__add_weak(); 4429} 4430 4431template<class _Tp> 4432template<class _Yp> 4433inline 4434weak_ptr<_Tp>::weak_ptr(shared_ptr<_Yp> const& __r, 4435 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4436 _NOEXCEPT 4437 : __ptr_(__r.__ptr_), 4438 __cntrl_(__r.__cntrl_) 4439{ 4440 if (__cntrl_) 4441 __cntrl_->__add_weak(); 4442} 4443 4444template<class _Tp> 4445template<class _Yp> 4446inline 4447weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp> const& __r, 4448 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4449 _NOEXCEPT 4450 : __ptr_(__r.__ptr_), 4451 __cntrl_(__r.__cntrl_) 4452{ 4453 if (__cntrl_) 4454 __cntrl_->__add_weak(); 4455} 4456 4457template<class _Tp> 4458inline 4459weak_ptr<_Tp>::weak_ptr(weak_ptr&& __r) _NOEXCEPT 4460 : __ptr_(__r.__ptr_), 4461 __cntrl_(__r.__cntrl_) 4462{ 4463 __r.__ptr_ = 0; 4464 __r.__cntrl_ = 0; 4465} 4466 4467template<class _Tp> 4468template<class _Yp> 4469inline 4470weak_ptr<_Tp>::weak_ptr(weak_ptr<_Yp>&& __r, 4471 typename enable_if<is_convertible<_Yp*, _Tp*>::value, __nat*>::type) 4472 _NOEXCEPT 4473 : __ptr_(__r.__ptr_), 4474 __cntrl_(__r.__cntrl_) 4475{ 4476 __r.__ptr_ = 0; 4477 __r.__cntrl_ = 0; 4478} 4479 4480template<class _Tp> 4481weak_ptr<_Tp>::~weak_ptr() 4482{ 4483 if (__cntrl_) 4484 __cntrl_->__release_weak(); 4485} 4486 4487template<class _Tp> 4488inline 4489weak_ptr<_Tp>& 4490weak_ptr<_Tp>::operator=(weak_ptr const& __r) _NOEXCEPT 4491{ 4492 weak_ptr(__r).swap(*this); 4493 return *this; 4494} 4495 4496template<class _Tp> 4497template<class _Yp> 4498inline 4499typename enable_if 4500< 4501 is_convertible<_Yp*, _Tp*>::value, 4502 weak_ptr<_Tp>& 4503>::type 4504weak_ptr<_Tp>::operator=(weak_ptr<_Yp> const& __r) _NOEXCEPT 4505{ 4506 weak_ptr(__r).swap(*this); 4507 return *this; 4508} 4509 4510template<class _Tp> 4511inline 4512weak_ptr<_Tp>& 4513weak_ptr<_Tp>::operator=(weak_ptr&& __r) _NOEXCEPT 4514{ 4515 weak_ptr(_VSTD::move(__r)).swap(*this); 4516 return *this; 4517} 4518 4519template<class _Tp> 4520template<class _Yp> 4521inline 4522typename enable_if 4523< 4524 is_convertible<_Yp*, _Tp*>::value, 4525 weak_ptr<_Tp>& 4526>::type 4527weak_ptr<_Tp>::operator=(weak_ptr<_Yp>&& __r) _NOEXCEPT 4528{ 4529 weak_ptr(_VSTD::move(__r)).swap(*this); 4530 return *this; 4531} 4532 4533template<class _Tp> 4534template<class _Yp> 4535inline 4536typename enable_if 4537< 4538 is_convertible<_Yp*, _Tp*>::value, 4539 weak_ptr<_Tp>& 4540>::type 4541weak_ptr<_Tp>::operator=(shared_ptr<_Yp> const& __r) _NOEXCEPT 4542{ 4543 weak_ptr(__r).swap(*this); 4544 return *this; 4545} 4546 4547template<class _Tp> 4548inline 4549void 4550weak_ptr<_Tp>::swap(weak_ptr& __r) _NOEXCEPT 4551{ 4552 _VSTD::swap(__ptr_, __r.__ptr_); 4553 _VSTD::swap(__cntrl_, __r.__cntrl_); 4554} 4555 4556template<class _Tp> 4557inline _LIBCPP_INLINE_VISIBILITY 4558void 4559swap(weak_ptr<_Tp>& __x, weak_ptr<_Tp>& __y) _NOEXCEPT 4560{ 4561 __x.swap(__y); 4562} 4563 4564template<class _Tp> 4565inline 4566void 4567weak_ptr<_Tp>::reset() _NOEXCEPT 4568{ 4569 weak_ptr().swap(*this); 4570} 4571 4572template<class _Tp> 4573template<class _Yp> 4574shared_ptr<_Tp>::shared_ptr(const weak_ptr<_Yp>& __r, 4575 typename enable_if<is_convertible<_Yp*, element_type*>::value, __nat>::type) 4576 : __ptr_(__r.__ptr_), 4577 __cntrl_(__r.__cntrl_ ? __r.__cntrl_->lock() : __r.__cntrl_) 4578{ 4579 if (__cntrl_ == 0) 4580 __throw_bad_weak_ptr(); 4581} 4582 4583template<class _Tp> 4584shared_ptr<_Tp> 4585weak_ptr<_Tp>::lock() const _NOEXCEPT 4586{ 4587 shared_ptr<_Tp> __r; 4588 __r.__cntrl_ = __cntrl_ ? __cntrl_->lock() : __cntrl_; 4589 if (__r.__cntrl_) 4590 __r.__ptr_ = __ptr_; 4591 return __r; 4592} 4593 4594#if _LIBCPP_STD_VER > 14 4595template <class _Tp = void> struct owner_less; 4596#else 4597template <class _Tp> struct owner_less; 4598#endif 4599 4600template <class _Tp> 4601struct _LIBCPP_TEMPLATE_VIS owner_less<shared_ptr<_Tp> > 4602 : binary_function<shared_ptr<_Tp>, shared_ptr<_Tp>, bool> 4603{ 4604 typedef bool result_type; 4605 _LIBCPP_INLINE_VISIBILITY 4606 bool operator()(shared_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4607 {return __x.owner_before(__y);} 4608 _LIBCPP_INLINE_VISIBILITY 4609 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4610 {return __x.owner_before(__y);} 4611 _LIBCPP_INLINE_VISIBILITY 4612 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4613 {return __x.owner_before(__y);} 4614}; 4615 4616template <class _Tp> 4617struct _LIBCPP_TEMPLATE_VIS owner_less<weak_ptr<_Tp> > 4618 : binary_function<weak_ptr<_Tp>, weak_ptr<_Tp>, bool> 4619{ 4620 typedef bool result_type; 4621 _LIBCPP_INLINE_VISIBILITY 4622 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4623 {return __x.owner_before(__y);} 4624 _LIBCPP_INLINE_VISIBILITY 4625 bool operator()(shared_ptr<_Tp> const& __x, weak_ptr<_Tp> const& __y) const _NOEXCEPT 4626 {return __x.owner_before(__y);} 4627 _LIBCPP_INLINE_VISIBILITY 4628 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Tp> const& __y) const _NOEXCEPT 4629 {return __x.owner_before(__y);} 4630}; 4631 4632#if _LIBCPP_STD_VER > 14 4633template <> 4634struct _LIBCPP_TEMPLATE_VIS owner_less<void> 4635{ 4636 template <class _Tp, class _Up> 4637 _LIBCPP_INLINE_VISIBILITY 4638 bool operator()( shared_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 4639 {return __x.owner_before(__y);} 4640 template <class _Tp, class _Up> 4641 _LIBCPP_INLINE_VISIBILITY 4642 bool operator()( shared_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 4643 {return __x.owner_before(__y);} 4644 template <class _Tp, class _Up> 4645 _LIBCPP_INLINE_VISIBILITY 4646 bool operator()( weak_ptr<_Tp> const& __x, shared_ptr<_Up> const& __y) const _NOEXCEPT 4647 {return __x.owner_before(__y);} 4648 template <class _Tp, class _Up> 4649 _LIBCPP_INLINE_VISIBILITY 4650 bool operator()( weak_ptr<_Tp> const& __x, weak_ptr<_Up> const& __y) const _NOEXCEPT 4651 {return __x.owner_before(__y);} 4652 typedef void is_transparent; 4653}; 4654#endif 4655 4656template<class _Tp> 4657class _LIBCPP_TEMPLATE_VIS enable_shared_from_this 4658{ 4659 mutable weak_ptr<_Tp> __weak_this_; 4660protected: 4661 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 4662 enable_shared_from_this() _NOEXCEPT {} 4663 _LIBCPP_INLINE_VISIBILITY 4664 enable_shared_from_this(enable_shared_from_this const&) _NOEXCEPT {} 4665 _LIBCPP_INLINE_VISIBILITY 4666 enable_shared_from_this& operator=(enable_shared_from_this const&) _NOEXCEPT 4667 {return *this;} 4668 _LIBCPP_INLINE_VISIBILITY 4669 ~enable_shared_from_this() {} 4670public: 4671 _LIBCPP_INLINE_VISIBILITY 4672 shared_ptr<_Tp> shared_from_this() 4673 {return shared_ptr<_Tp>(__weak_this_);} 4674 _LIBCPP_INLINE_VISIBILITY 4675 shared_ptr<_Tp const> shared_from_this() const 4676 {return shared_ptr<const _Tp>(__weak_this_);} 4677 4678#if _LIBCPP_STD_VER > 14 4679 _LIBCPP_INLINE_VISIBILITY 4680 weak_ptr<_Tp> weak_from_this() _NOEXCEPT 4681 { return __weak_this_; } 4682 4683 _LIBCPP_INLINE_VISIBILITY 4684 weak_ptr<const _Tp> weak_from_this() const _NOEXCEPT 4685 { return __weak_this_; } 4686#endif // _LIBCPP_STD_VER > 14 4687 4688 template <class _Up> friend class shared_ptr; 4689}; 4690 4691template <class _Tp> 4692struct _LIBCPP_TEMPLATE_VIS hash<shared_ptr<_Tp> > 4693{ 4694 typedef shared_ptr<_Tp> argument_type; 4695 typedef size_t result_type; 4696 4697 _LIBCPP_INLINE_VISIBILITY 4698 result_type operator()(const argument_type& __ptr) const _NOEXCEPT 4699 { 4700 return hash<typename shared_ptr<_Tp>::element_type*>()(__ptr.get()); 4701 } 4702}; 4703 4704template<class _CharT, class _Traits, class _Yp> 4705inline _LIBCPP_INLINE_VISIBILITY 4706basic_ostream<_CharT, _Traits>& 4707operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> const& __p); 4708 4709 4710#if !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 4711 4712class _LIBCPP_TYPE_VIS __sp_mut 4713{ 4714 void* __lx; 4715public: 4716 void lock() _NOEXCEPT; 4717 void unlock() _NOEXCEPT; 4718 4719private: 4720 _LIBCPP_CONSTEXPR __sp_mut(void*) _NOEXCEPT; 4721 __sp_mut(const __sp_mut&); 4722 __sp_mut& operator=(const __sp_mut&); 4723 4724 friend _LIBCPP_FUNC_VIS __sp_mut& __get_sp_mut(const void*); 4725}; 4726 4727_LIBCPP_FUNC_VIS _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4728__sp_mut& __get_sp_mut(const void*); 4729 4730template <class _Tp> 4731inline _LIBCPP_INLINE_VISIBILITY 4732bool 4733atomic_is_lock_free(const shared_ptr<_Tp>*) 4734{ 4735 return false; 4736} 4737 4738template <class _Tp> 4739_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4740shared_ptr<_Tp> 4741atomic_load(const shared_ptr<_Tp>* __p) 4742{ 4743 __sp_mut& __m = __get_sp_mut(__p); 4744 __m.lock(); 4745 shared_ptr<_Tp> __q = *__p; 4746 __m.unlock(); 4747 return __q; 4748} 4749 4750template <class _Tp> 4751inline _LIBCPP_INLINE_VISIBILITY 4752_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4753shared_ptr<_Tp> 4754atomic_load_explicit(const shared_ptr<_Tp>* __p, memory_order) 4755{ 4756 return atomic_load(__p); 4757} 4758 4759template <class _Tp> 4760_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4761void 4762atomic_store(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 4763{ 4764 __sp_mut& __m = __get_sp_mut(__p); 4765 __m.lock(); 4766 __p->swap(__r); 4767 __m.unlock(); 4768} 4769 4770template <class _Tp> 4771inline _LIBCPP_INLINE_VISIBILITY 4772_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4773void 4774atomic_store_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 4775{ 4776 atomic_store(__p, __r); 4777} 4778 4779template <class _Tp> 4780_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4781shared_ptr<_Tp> 4782atomic_exchange(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r) 4783{ 4784 __sp_mut& __m = __get_sp_mut(__p); 4785 __m.lock(); 4786 __p->swap(__r); 4787 __m.unlock(); 4788 return __r; 4789} 4790 4791template <class _Tp> 4792inline _LIBCPP_INLINE_VISIBILITY 4793_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4794shared_ptr<_Tp> 4795atomic_exchange_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp> __r, memory_order) 4796{ 4797 return atomic_exchange(__p, __r); 4798} 4799 4800template <class _Tp> 4801_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4802bool 4803atomic_compare_exchange_strong(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 4804{ 4805 shared_ptr<_Tp> __temp; 4806 __sp_mut& __m = __get_sp_mut(__p); 4807 __m.lock(); 4808 if (__p->__owner_equivalent(*__v)) 4809 { 4810 _VSTD::swap(__temp, *__p); 4811 *__p = __w; 4812 __m.unlock(); 4813 return true; 4814 } 4815 _VSTD::swap(__temp, *__v); 4816 *__v = *__p; 4817 __m.unlock(); 4818 return false; 4819} 4820 4821template <class _Tp> 4822inline _LIBCPP_INLINE_VISIBILITY 4823_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4824bool 4825atomic_compare_exchange_weak(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, shared_ptr<_Tp> __w) 4826{ 4827 return atomic_compare_exchange_strong(__p, __v, __w); 4828} 4829 4830template <class _Tp> 4831inline _LIBCPP_INLINE_VISIBILITY 4832_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4833bool 4834atomic_compare_exchange_strong_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 4835 shared_ptr<_Tp> __w, memory_order, memory_order) 4836{ 4837 return atomic_compare_exchange_strong(__p, __v, __w); 4838} 4839 4840template <class _Tp> 4841inline _LIBCPP_INLINE_VISIBILITY 4842_LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR 4843bool 4844atomic_compare_exchange_weak_explicit(shared_ptr<_Tp>* __p, shared_ptr<_Tp>* __v, 4845 shared_ptr<_Tp> __w, memory_order, memory_order) 4846{ 4847 return atomic_compare_exchange_weak(__p, __v, __w); 4848} 4849 4850#endif // !defined(_LIBCPP_HAS_NO_ATOMIC_HEADER) 4851 4852//enum class 4853#if defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) 4854# ifndef _LIBCPP_CXX03_LANG 4855enum class pointer_safety : unsigned char { 4856 relaxed, 4857 preferred, 4858 strict 4859}; 4860# endif 4861#else 4862struct _LIBCPP_TYPE_VIS pointer_safety 4863{ 4864 enum __lx 4865 { 4866 relaxed, 4867 preferred, 4868 strict 4869 }; 4870 4871 __lx __v_; 4872 4873 _LIBCPP_INLINE_VISIBILITY 4874 pointer_safety() : __v_() {} 4875 4876 _LIBCPP_INLINE_VISIBILITY 4877 pointer_safety(__lx __v) : __v_(__v) {} 4878 _LIBCPP_INLINE_VISIBILITY 4879 operator int() const {return __v_;} 4880}; 4881#endif 4882 4883#if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) && \ 4884 defined(_LIBCPP_BUILDING_LIBRARY) 4885_LIBCPP_FUNC_VIS pointer_safety get_pointer_safety() _NOEXCEPT; 4886#else 4887// This function is only offered in C++03 under ABI v1. 4888# if !defined(_LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE) || !defined(_LIBCPP_CXX03_LANG) 4889inline _LIBCPP_INLINE_VISIBILITY 4890pointer_safety get_pointer_safety() _NOEXCEPT { 4891 return pointer_safety::relaxed; 4892} 4893# endif 4894#endif 4895 4896 4897_LIBCPP_FUNC_VIS void declare_reachable(void* __p); 4898_LIBCPP_FUNC_VIS void declare_no_pointers(char* __p, size_t __n); 4899_LIBCPP_FUNC_VIS void undeclare_no_pointers(char* __p, size_t __n); 4900_LIBCPP_FUNC_VIS void* __undeclare_reachable(void* __p); 4901 4902template <class _Tp> 4903inline _LIBCPP_INLINE_VISIBILITY 4904_Tp* 4905undeclare_reachable(_Tp* __p) 4906{ 4907 return static_cast<_Tp*>(__undeclare_reachable(__p)); 4908} 4909 4910_LIBCPP_FUNC_VIS void* align(size_t __align, size_t __sz, void*& __ptr, size_t& __space); 4911 4912// --- Helper for container swap -- 4913template <typename _Alloc> 4914inline _LIBCPP_INLINE_VISIBILITY 4915void __swap_allocator(_Alloc & __a1, _Alloc & __a2) 4916#if _LIBCPP_STD_VER >= 14 4917 _NOEXCEPT 4918#else 4919 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 4920#endif 4921{ 4922 __swap_allocator(__a1, __a2, 4923 integral_constant<bool, _VSTD::allocator_traits<_Alloc>::propagate_on_container_swap::value>()); 4924} 4925 4926template <typename _Alloc> 4927_LIBCPP_INLINE_VISIBILITY 4928void __swap_allocator(_Alloc & __a1, _Alloc & __a2, true_type) 4929#if _LIBCPP_STD_VER >= 14 4930 _NOEXCEPT 4931#else 4932 _NOEXCEPT_(__is_nothrow_swappable<_Alloc>::value) 4933#endif 4934{ 4935 using _VSTD::swap; 4936 swap(__a1, __a2); 4937} 4938 4939template <typename _Alloc> 4940inline _LIBCPP_INLINE_VISIBILITY 4941void __swap_allocator(_Alloc &, _Alloc &, false_type) _NOEXCEPT {} 4942 4943template <typename _Alloc, typename _Traits=allocator_traits<_Alloc> > 4944struct __noexcept_move_assign_container : public integral_constant<bool, 4945 _Traits::propagate_on_container_move_assignment::value 4946#if _LIBCPP_STD_VER > 14 4947 || _Traits::is_always_equal::value 4948#else 4949 && is_nothrow_move_assignable<_Alloc>::value 4950#endif 4951 > {}; 4952 4953 4954template <class _Tp, class _Alloc> 4955struct __temp_value { 4956 typedef allocator_traits<_Alloc> _Traits; 4957 4958 typename aligned_storage<sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)>::type __v; 4959 _Alloc &__a; 4960 4961 _Tp *__addr() { return reinterpret_cast<_Tp *>(addressof(__v)); } 4962 _Tp & get() { return *__addr(); } 4963 4964 template<class... _Args> 4965 _LIBCPP_NO_CFI 4966 __temp_value(_Alloc &__alloc, _Args&& ... __args) : __a(__alloc) { 4967 _Traits::construct(__a, reinterpret_cast<_Tp*>(addressof(__v)), 4968 _VSTD::forward<_Args>(__args)...); 4969 } 4970 4971 ~__temp_value() { _Traits::destroy(__a, __addr()); } 4972 }; 4973 4974template<typename _Alloc, typename = void, typename = void> 4975struct __is_allocator : false_type {}; 4976 4977template<typename _Alloc> 4978struct __is_allocator<_Alloc, 4979 typename __void_t<typename _Alloc::value_type>::type, 4980 typename __void_t<decltype(_VSTD::declval<_Alloc&>().allocate(size_t(0)))>::type 4981 > 4982 : true_type {}; 4983 4984// __builtin_new_allocator -- A non-templated helper for allocating and 4985// deallocating memory using __builtin_operator_new and 4986// __builtin_operator_delete. It should be used in preference to 4987// `std::allocator<T>` to avoid additional instantiations. 4988struct __builtin_new_allocator { 4989 struct __builtin_new_deleter { 4990 typedef void* pointer_type; 4991 4992 _LIBCPP_CONSTEXPR explicit __builtin_new_deleter(size_t __size, size_t __align) 4993 : __size_(__size), __align_(__align) {} 4994 4995 void operator()(void* p) const _NOEXCEPT { 4996 std::__libcpp_deallocate(p, __size_, __align_); 4997 } 4998 4999 private: 5000 size_t __size_; 5001 size_t __align_; 5002 }; 5003 5004 typedef unique_ptr<void, __builtin_new_deleter> __holder_t; 5005 5006 static __holder_t __allocate_bytes(size_t __s, size_t __align) { 5007 return __holder_t(std::__libcpp_allocate(__s, __align), 5008 __builtin_new_deleter(__s, __align)); 5009 } 5010 5011 static void __deallocate_bytes(void* __p, size_t __s, 5012 size_t __align) _NOEXCEPT { 5013 std::__libcpp_deallocate(__p, __s, __align); 5014 } 5015 5016 template <class _Tp> 5017 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 5018 static __holder_t __allocate_type(size_t __n) { 5019 return __allocate_bytes(__n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 5020 } 5021 5022 template <class _Tp> 5023 _LIBCPP_NODEBUG _LIBCPP_ALWAYS_INLINE 5024 static void __deallocate_type(void* __p, size_t __n) _NOEXCEPT { 5025 __deallocate_bytes(__p, __n * sizeof(_Tp), _LIBCPP_ALIGNOF(_Tp)); 5026 } 5027}; 5028 5029 5030_LIBCPP_END_NAMESPACE_STD 5031 5032_LIBCPP_POP_MACROS 5033 5034#if defined(_LIBCPP_HAS_PARALLEL_ALGORITHMS) && _LIBCPP_STD_VER >= 17 5035# include <__pstl_memory> 5036#endif 5037 5038#endif // _LIBCPP_MEMORY 5039