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