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