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