1// -*- C++ -*- 2//===-------------------------- iterator ----------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_ITERATOR 11#define _LIBCPP_ITERATOR 12 13/* 14 iterator synopsis 15 16#include <concepts> 17 18namespace std 19{ 20template<class> struct incrementable_traits; // since C++20 21template<class T> 22 using iter_difference_t = see below; // since C++20 23 24template<class> struct indirectly_readable_traits; // since C++20 25template<class T> 26 using iter_value_t = see below; // since C++20 27 28template<class Iterator> 29struct iterator_traits; 30 31template<class T> 32 requires is_object_v<T> // since C++20 33struct iterator_traits<T*>; 34 35template<dereferenceable T> 36 using iter_reference_t = decltype(*declval<T&>()); 37 38namespace ranges::inline unspecified { 39 inline constexpr unspecified iter_move = unspecified; // since C++20, nodiscard as an extension 40}} 41 42template<dereferenceable T> 43 requires ... 44using iter_rvalue_reference_t = decltype(ranges::iter_move(declval<T&>())); // since C++20 45 46// [iterator.concepts], iterator concepts 47// [iterator.concept.readable], concept indirectly_readable 48template<class In> 49 concept indirectly_readable = see below; // since C++20 50 51template<indirectly_readable T> 52 using iter_common_reference_t = 53 common_reference_t<iter_reference_t<T>, iter_value_t<T>&>; // since C++20 54 55// [iterator.concept.writable], concept indirectly_writable 56template<class Out, class T> 57 concept indirectly_writable = see below; // since C++20 58 59// [iterator.concept.winc], concept weakly_incrementable 60template<class I> 61 concept weakly_incrementable = see below; // since C++20 62 63// [iterator.concept.inc], concept incrementable 64template<class I> 65 concept incrementable = see below; // since C++20 66 67// [iterator.concept.iterator], concept input_or_output_iterator 68 template<class I> 69 concept input_or_output_iterator = see below; // since C++20 70 71// [iterator.concept.sentinel], concept sentinel_for 72template<class S, class I> 73 concept sentinel_for = see below; // since C++20 74 75// [iterator.concept.sizedsentinel], concept sized_sentinel_for 76template<class S, class I> 77 inline constexpr bool disable_sized_sentinel_for = false; 78 79template<class S, class I> 80 concept sized_sentinel_for = see below; 81 82// [iterator.concept.input], concept input_iterator 83template<class I> 84 concept input_iterator = see below; // since C++20 85 86// [iterator.concept.forward], concept forward_iterator 87template<class I> 88 concept forward_iterator = see below; // since C++20 89 90// [iterator.concept.bidir], concept bidirectional_iterator 91template<class I> 92 concept bidirectional_iterator = see below; // since C++20 93 94// [iterator.concept.random.access], concept random_access_iterator 95template<class I> 96 concept random_access_iterator = see below; // since C++20 97 98// [indirectcallable] 99// [indirectcallable.indirectinvocable] 100template<class F, class I> 101 concept indirectly_unary_invocable = see below; // since C++20 102 103template<class F, class I> 104 concept indirectly_regular_unary_invocable = see below; // since C++20 105 106template<class F, class I> 107 concept indirect_unary_predicate = see below; // since C++20 108 109template<class F, class I1, class I2> 110 concept indirect_binary_predicate = see below; // since C++20 111 112template<class F, class I1, class I2 = I1> 113 concept indirect_equivalence_relation = see below; // since C++20 114 115template<class F, class I1, class I2 = I1> 116 concept indirect_strict_weak_order = see below; // since C++20 117 118template<class F, class... Is> 119 using indirect_result_t = see below; // since C++20 120 121// [projected], projected 122template<indirectly_readable I, indirectly_regular_unary_invocable<I> Proj> 123 struct projected; // since C++20 124 125template<weakly_incrementable I, indirectly_regular_unary_invocable<I> Proj> 126 struct incrementable_traits<projected<I, Proj>>; // since C++20 127 128template<class Category, class T, class Distance = ptrdiff_t, 129 class Pointer = T*, class Reference = T&> 130struct iterator // deprecated in C++17 131{ 132 typedef T value_type; 133 typedef Distance difference_type; 134 typedef Pointer pointer; 135 typedef Reference reference; 136 typedef Category iterator_category; 137}; 138 139struct input_iterator_tag {}; 140struct output_iterator_tag {}; 141struct forward_iterator_tag : public input_iterator_tag {}; 142struct bidirectional_iterator_tag : public forward_iterator_tag {}; 143struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 144 145// 27.4.3, iterator operations 146template <class InputIterator, class Distance> // constexpr in C++17 147 constexpr void advance(InputIterator& i, Distance n); 148 149template <class InputIterator> // constexpr in C++17 150 constexpr typename iterator_traits<InputIterator>::difference_type 151 distance(InputIterator first, InputIterator last); 152 153template <class InputIterator> // constexpr in C++17 154 constexpr InputIterator next(InputIterator x, 155typename iterator_traits<InputIterator>::difference_type n = 1); 156 157template <class BidirectionalIterator> // constexpr in C++17 158 constexpr BidirectionalIterator prev(BidirectionalIterator x, 159 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 160 161// [range.iter.ops], range iterator operations 162namespace ranges { 163 // [range.iter.op.advance], ranges::advance 164 template<input_or_output_iterator I> 165 constexpr void advance(I& i, iter_difference_t<I> n); // since C++20 166 template<input_or_output_iterator I, sentinel_for<I> S> 167 constexpr void advance(I& i, S bound); // since C++20 168 template<input_or_output_iterator I, sentinel_for<I> S> 169 constexpr iter_difference_t<I> advance(I& i, iter_difference_t<I> n, S bound); // since C++20 170} 171 172template <class Iterator> 173class reverse_iterator 174 : public iterator<typename iterator_traits<Iterator>::iterator_category, // until C++17 175 typename iterator_traits<Iterator>::value_type, 176 typename iterator_traits<Iterator>::difference_type, 177 typename iterator_traits<Iterator>::pointer, 178 typename iterator_traits<Iterator>::reference> 179{ 180protected: 181 Iterator current; 182public: 183 typedef Iterator iterator_type; 184 typedef typename iterator_traits<Iterator>::difference_type difference_type; 185 typedef typename iterator_traits<Iterator>::reference reference; 186 typedef typename iterator_traits<Iterator>::pointer pointer; 187 188 constexpr reverse_iterator(); 189 constexpr explicit reverse_iterator(Iterator x); 190 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 191 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 192 constexpr Iterator base() const; 193 constexpr reference operator*() const; 194 constexpr pointer operator->() const; 195 constexpr reverse_iterator& operator++(); 196 constexpr reverse_iterator operator++(int); 197 constexpr reverse_iterator& operator--(); 198 constexpr reverse_iterator operator--(int); 199 constexpr reverse_iterator operator+ (difference_type n) const; 200 constexpr reverse_iterator& operator+=(difference_type n); 201 constexpr reverse_iterator operator- (difference_type n) const; 202 constexpr reverse_iterator& operator-=(difference_type n); 203 constexpr reference operator[](difference_type n) const; 204}; 205 206template <class Iterator1, class Iterator2> 207constexpr bool // constexpr in C++17 208operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 209 210template <class Iterator1, class Iterator2> 211constexpr bool // constexpr in C++17 212operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 213 214template <class Iterator1, class Iterator2> 215constexpr bool // constexpr in C++17 216operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 217 218template <class Iterator1, class Iterator2> 219constexpr bool // constexpr in C++17 220operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 221 222template <class Iterator1, class Iterator2> 223constexpr bool // constexpr in C++17 224operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 225 226template <class Iterator1, class Iterator2> 227constexpr bool // constexpr in C++17 228operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 229 230template <class Iterator1, class Iterator2> 231constexpr auto 232operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 233-> decltype(__y.base() - __x.base()); // constexpr in C++17 234 235template <class Iterator> 236constexpr reverse_iterator<Iterator> 237operator+(typename reverse_iterator<Iterator>::difference_type n, 238 const reverse_iterator<Iterator>& x); // constexpr in C++17 239 240template <class Iterator> 241constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 242 243template <class Container> 244class back_insert_iterator 245 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 246{ 247protected: 248 Container* container; 249public: 250 typedef Container container_type; 251 typedef void value_type; 252 typedef void difference_type; // until C++20 253 typedef ptrdiff_t difference_type; // since C++20 254 typedef void reference; 255 typedef void pointer; 256 257 explicit back_insert_iterator(Container& x); // constexpr in C++20 258 back_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 259 back_insert_iterator& operator*(); // constexpr in C++20 260 back_insert_iterator& operator++(); // constexpr in C++20 261 back_insert_iterator operator++(int); // constexpr in C++20 262}; 263 264template <class Container> back_insert_iterator<Container> back_inserter(Container& x); // constexpr in C++20 265 266template <class Container> 267class front_insert_iterator 268 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 269{ 270protected: 271 Container* container; 272public: 273 typedef Container container_type; 274 typedef void value_type; 275 typedef void difference_type; // until C++20 276 typedef ptrdiff_t difference_type; // since C++20 277 typedef void reference; 278 typedef void pointer; 279 280 explicit front_insert_iterator(Container& x); // constexpr in C++20 281 front_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 282 front_insert_iterator& operator*(); // constexpr in C++20 283 front_insert_iterator& operator++(); // constexpr in C++20 284 front_insert_iterator operator++(int); // constexpr in C++20 285}; 286 287template <class Container> front_insert_iterator<Container> front_inserter(Container& x); // constexpr in C++20 288 289template <class Container> 290class insert_iterator 291 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 292{ 293protected: 294 Container* container; 295 typename Container::iterator iter; 296public: 297 typedef Container container_type; 298 typedef void value_type; 299 typedef void difference_type; // until C++20 300 typedef ptrdiff_t difference_type; // since C++20 301 typedef void reference; 302 typedef void pointer; 303 304 insert_iterator(Container& x, typename Container::iterator i); // constexpr in C++20 305 insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 306 insert_iterator& operator*(); // constexpr in C++20 307 insert_iterator& operator++(); // constexpr in C++20 308 insert_iterator& operator++(int); // constexpr in C++20 309}; 310 311template <class Container, class Iterator> 312insert_iterator<Container> inserter(Container& x, Iterator i); // constexpr in C++20 313 314template <class Iterator> 315class move_iterator { 316public: 317 typedef Iterator iterator_type; 318 typedef typename iterator_traits<Iterator>::difference_type difference_type; 319 typedef Iterator pointer; 320 typedef typename iterator_traits<Iterator>::value_type value_type; 321 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 322 typedef value_type&& reference; 323 324 constexpr move_iterator(); // all the constexprs are in C++17 325 constexpr explicit move_iterator(Iterator i); 326 template <class U> 327 constexpr move_iterator(const move_iterator<U>& u); 328 template <class U> 329 constexpr move_iterator& operator=(const move_iterator<U>& u); 330 constexpr iterator_type base() const; 331 constexpr reference operator*() const; 332 constexpr pointer operator->() const; 333 constexpr move_iterator& operator++(); 334 constexpr move_iterator operator++(int); 335 constexpr move_iterator& operator--(); 336 constexpr move_iterator operator--(int); 337 constexpr move_iterator operator+(difference_type n) const; 338 constexpr move_iterator& operator+=(difference_type n); 339 constexpr move_iterator operator-(difference_type n) const; 340 constexpr move_iterator& operator-=(difference_type n); 341 constexpr unspecified operator[](difference_type n) const; 342private: 343 Iterator current; // exposition only 344}; 345 346template <class Iterator1, class Iterator2> 347constexpr bool // constexpr in C++17 348operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 349 350template <class Iterator1, class Iterator2> 351constexpr bool // constexpr in C++17 352operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 353 354template <class Iterator1, class Iterator2> 355constexpr bool // constexpr in C++17 356operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 357 358template <class Iterator1, class Iterator2> 359constexpr bool // constexpr in C++17 360operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 361 362template <class Iterator1, class Iterator2> 363constexpr bool // constexpr in C++17 364operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 365 366template <class Iterator1, class Iterator2> 367constexpr bool // constexpr in C++17 368operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 369 370template <class Iterator1, class Iterator2> 371constexpr auto // constexpr in C++17 372operator-(const move_iterator<Iterator1>& x, 373 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 374 375template <class Iterator> 376constexpr move_iterator<Iterator> operator+( // constexpr in C++17 377 typename move_iterator<Iterator>::difference_type n, 378 const move_iterator<Iterator>& x); 379 380template <class Iterator> // constexpr in C++17 381constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 382 383// [default.sentinel], default sentinel 384struct default_sentinel_t; 385inline constexpr default_sentinel_t default_sentinel{}; 386 387template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 388class istream_iterator 389 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> // until C++17 390{ 391public: 392 typedef input_iterator_tag iterator_category; 393 typedef T value_type; 394 typedef Distance difference_type; 395 typedef const T* pointer; 396 typedef const T& reference; 397 398 typedef charT char_type; 399 typedef traits traits_type; 400 typedef basic_istream<charT, traits> istream_type; 401 402 constexpr istream_iterator(); 403 istream_iterator(istream_type& s); 404 istream_iterator(const istream_iterator& x); 405 ~istream_iterator(); 406 407 const T& operator*() const; 408 const T* operator->() const; 409 istream_iterator& operator++(); 410 istream_iterator operator++(int); 411}; 412 413template <class T, class charT, class traits, class Distance> 414bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 415 const istream_iterator<T,charT,traits,Distance>& y); 416template <class T, class charT, class traits, class Distance> 417bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 418 const istream_iterator<T,charT,traits,Distance>& y); 419 420template <class T, class charT = char, class traits = char_traits<charT> > 421class ostream_iterator 422 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 423{ 424public: 425 typedef output_iterator_tag iterator_category; 426 typedef void value_type; 427 typedef void difference_type; // until C++20 428 typedef ptrdiff_t difference_type; // since C++20 429 typedef void pointer; 430 typedef void reference; 431 432 typedef charT char_type; 433 typedef traits traits_type; 434 typedef basic_ostream<charT,traits> ostream_type; 435 436 ostream_iterator(ostream_type& s); 437 ostream_iterator(ostream_type& s, const charT* delimiter); 438 ostream_iterator(const ostream_iterator& x); 439 ~ostream_iterator(); 440 ostream_iterator& operator=(const T& value); 441 442 ostream_iterator& operator*(); 443 ostream_iterator& operator++(); 444 ostream_iterator& operator++(int); 445}; 446 447template<class charT, class traits = char_traits<charT> > 448class istreambuf_iterator 449 : public iterator<input_iterator_tag, charT, traits::off_type, unspecified, charT> // until C++17 450{ 451public: 452 typedef input_iterator_tag iterator_category; 453 typedef charT value_type; 454 typedef traits::off_type difference_type; 455 typedef unspecified pointer; 456 typedef charT reference; 457 458 typedef charT char_type; 459 typedef traits traits_type; 460 typedef traits::int_type int_type; 461 typedef basic_streambuf<charT, traits> streambuf_type; 462 typedef basic_istream<charT, traits> istream_type; 463 464 istreambuf_iterator() noexcept; 465 istreambuf_iterator(istream_type& s) noexcept; 466 istreambuf_iterator(streambuf_type* s) noexcept; 467 istreambuf_iterator(a-private-type) noexcept; 468 469 charT operator*() const; 470 pointer operator->() const; 471 istreambuf_iterator& operator++(); 472 a-private-type operator++(int); 473 474 bool equal(const istreambuf_iterator& b) const; 475}; 476 477template <class charT, class traits> 478bool operator==(const istreambuf_iterator<charT,traits>& a, 479 const istreambuf_iterator<charT,traits>& b); 480template <class charT, class traits> 481bool operator!=(const istreambuf_iterator<charT,traits>& a, 482 const istreambuf_iterator<charT,traits>& b); 483 484template <class charT, class traits = char_traits<charT> > 485class ostreambuf_iterator 486 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 487{ 488public: 489 typedef output_iterator_tag iterator_category; 490 typedef void value_type; 491 typedef void difference_type; // until C++20 492 typedef ptrdiff_t difference_type; // since C++20 493 typedef void pointer; 494 typedef void reference; 495 496 typedef charT char_type; 497 typedef traits traits_type; 498 typedef basic_streambuf<charT, traits> streambuf_type; 499 typedef basic_ostream<charT, traits> ostream_type; 500 501 ostreambuf_iterator(ostream_type& s) noexcept; 502 ostreambuf_iterator(streambuf_type* s) noexcept; 503 ostreambuf_iterator& operator=(charT c); 504 ostreambuf_iterator& operator*(); 505 ostreambuf_iterator& operator++(); 506 ostreambuf_iterator& operator++(int); 507 bool failed() const noexcept; 508}; 509 510template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 511template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 512template <class C> constexpr auto end(C& c) -> decltype(c.end()); 513template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 514template <class T, size_t N> constexpr T* begin(T (&array)[N]); 515template <class T, size_t N> constexpr T* end(T (&array)[N]); 516 517template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 518template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 519template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 520template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 521template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 522template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 523template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 524template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 525template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 526template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 527template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 528template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 529 530// 24.8, container access: 531template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 532template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 533 534template <class C> constexpr auto ssize(const C& c) 535 -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 536template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 537 538template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 539template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 540template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 541template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 542template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 543template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 544template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 545 546} // std 547 548*/ 549 550#include <__config> 551#include <__debug> 552#include <__functional_base> 553#include <__iterator/advance.h> 554#include <__iterator/concepts.h> 555#include <__iterator/default_sentinel.h> 556#include <__iterator/incrementable_traits.h> 557#include <__iterator/iter_move.h> 558#include <__iterator/iterator_traits.h> 559#include <__iterator/next.h> 560#include <__iterator/prev.h> 561#include <__iterator/projected.h> 562#include <__iterator/readable_traits.h> 563#include <__memory/addressof.h> 564#include <__memory/pointer_traits.h> 565#include <compare> 566#include <concepts> // Mandated by the Standard. 567#include <cstddef> 568#include <initializer_list> 569#include <iosfwd> // for forward declarations of vector and string 570#include <type_traits> 571#include <version> 572 573#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 574#pragma GCC system_header 575#endif 576 577_LIBCPP_BEGIN_NAMESPACE_STD 578 579template<class _Category, class _Tp, class _Distance = ptrdiff_t, 580 class _Pointer = _Tp*, class _Reference = _Tp&> 581struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 iterator 582{ 583 typedef _Tp value_type; 584 typedef _Distance difference_type; 585 typedef _Pointer pointer; 586 typedef _Reference reference; 587 typedef _Category iterator_category; 588}; 589 590template <class _InputIter> 591inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 592typename iterator_traits<_InputIter>::difference_type 593__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 594{ 595 typename iterator_traits<_InputIter>::difference_type __r(0); 596 for (; __first != __last; ++__first) 597 ++__r; 598 return __r; 599} 600 601template <class _RandIter> 602inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 603typename iterator_traits<_RandIter>::difference_type 604__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 605{ 606 return __last - __first; 607} 608 609template <class _InputIter> 610inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 611typename iterator_traits<_InputIter>::difference_type 612distance(_InputIter __first, _InputIter __last) 613{ 614 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 615} 616 617template <class _Tp, class = void> 618struct __is_stashing_iterator : false_type {}; 619 620template <class _Tp> 621struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 622 : true_type {}; 623 624_LIBCPP_SUPPRESS_DEPRECATED_PUSH 625template <class _Iter> 626class _LIBCPP_TEMPLATE_VIS reverse_iterator 627#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 628 : public iterator<typename iterator_traits<_Iter>::iterator_category, 629 typename iterator_traits<_Iter>::value_type, 630 typename iterator_traits<_Iter>::difference_type, 631 typename iterator_traits<_Iter>::pointer, 632 typename iterator_traits<_Iter>::reference> 633#endif 634{ 635_LIBCPP_SUPPRESS_DEPRECATED_POP 636private: 637#ifndef _LIBCPP_ABI_NO_ITERATOR_BASES 638 _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 639#endif 640 641 static_assert(!__is_stashing_iterator<_Iter>::value, 642 "The specified iterator type cannot be used with reverse_iterator; " 643 "Using stashing iterators with reverse_iterator causes undefined behavior"); 644 645protected: 646 _Iter current; 647public: 648 typedef _Iter iterator_type; 649 typedef typename iterator_traits<_Iter>::difference_type difference_type; 650 typedef typename iterator_traits<_Iter>::reference reference; 651 typedef typename iterator_traits<_Iter>::pointer pointer; 652 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 653 random_access_iterator_tag, 654 typename iterator_traits<_Iter>::iterator_category> iterator_category; 655 typedef typename iterator_traits<_Iter>::value_type value_type; 656 657#if _LIBCPP_STD_VER > 17 658 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 659 random_access_iterator_tag, 660 bidirectional_iterator_tag> iterator_concept; 661#endif 662 663#ifndef _LIBCPP_ABI_NO_ITERATOR_BASES 664 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 665 reverse_iterator() : __t(), current() {} 666 667 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 668 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 669 670 template <class _Up, class = _EnableIf< 671 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 672 > > 673 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 674 reverse_iterator(const reverse_iterator<_Up>& __u) 675 : __t(__u.base()), current(__u.base()) 676 { } 677 678 template <class _Up, class = _EnableIf< 679 !is_same<_Up, _Iter>::value && 680 is_convertible<_Up const&, _Iter>::value && 681 is_assignable<_Up const&, _Iter>::value 682 > > 683 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 684 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) { 685 __t = current = __u.base(); 686 return *this; 687 } 688#else 689 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 690 reverse_iterator() : current() {} 691 692 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 693 explicit reverse_iterator(_Iter __x) : current(__x) {} 694 695 template <class _Up, class = _EnableIf< 696 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 697 > > 698 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 699 reverse_iterator(const reverse_iterator<_Up>& __u) 700 : current(__u.base()) 701 { } 702 703 template <class _Up, class = _EnableIf< 704 !is_same<_Up, _Iter>::value && 705 is_convertible<_Up const&, _Iter>::value && 706 is_assignable<_Up const&, _Iter>::value 707 > > 708 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 709 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) { 710 current = __u.base(); 711 return *this; 712 } 713#endif 714 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 715 _Iter base() const {return current;} 716 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 717 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 718 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 719 pointer operator->() const {return _VSTD::addressof(operator*());} 720 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 721 reverse_iterator& operator++() {--current; return *this;} 722 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 723 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 724 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 725 reverse_iterator& operator--() {++current; return *this;} 726 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 727 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 728 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 729 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 730 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 731 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 732 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 733 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 734 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 735 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 736 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 737 reference operator[](difference_type __n) const {return *(*this + __n);} 738}; 739 740template <class _Iter1, class _Iter2> 741inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 742bool 743operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 744{ 745 return __x.base() == __y.base(); 746} 747 748template <class _Iter1, class _Iter2> 749inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 750bool 751operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 752{ 753 return __x.base() > __y.base(); 754} 755 756template <class _Iter1, class _Iter2> 757inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 758bool 759operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 760{ 761 return __x.base() != __y.base(); 762} 763 764template <class _Iter1, class _Iter2> 765inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 766bool 767operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 768{ 769 return __x.base() < __y.base(); 770} 771 772template <class _Iter1, class _Iter2> 773inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 774bool 775operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 776{ 777 return __x.base() <= __y.base(); 778} 779 780template <class _Iter1, class _Iter2> 781inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 782bool 783operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 784{ 785 return __x.base() >= __y.base(); 786} 787 788#ifndef _LIBCPP_CXX03_LANG 789template <class _Iter1, class _Iter2> 790inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 791auto 792operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 793-> decltype(__y.base() - __x.base()) 794{ 795 return __y.base() - __x.base(); 796} 797#else 798template <class _Iter1, class _Iter2> 799inline _LIBCPP_INLINE_VISIBILITY 800typename reverse_iterator<_Iter1>::difference_type 801operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 802{ 803 return __y.base() - __x.base(); 804} 805#endif 806 807template <class _Iter> 808inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 809reverse_iterator<_Iter> 810operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 811{ 812 return reverse_iterator<_Iter>(__x.base() - __n); 813} 814 815#if _LIBCPP_STD_VER > 11 816template <class _Iter> 817inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 818reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 819{ 820 return reverse_iterator<_Iter>(__i); 821} 822#endif 823 824_LIBCPP_SUPPRESS_DEPRECATED_PUSH 825template <class _Container> 826class _LIBCPP_TEMPLATE_VIS back_insert_iterator 827#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 828 : public iterator<output_iterator_tag, void, void, void, void> 829#endif 830{ 831_LIBCPP_SUPPRESS_DEPRECATED_POP 832protected: 833 _Container* container; 834public: 835 typedef output_iterator_tag iterator_category; 836 typedef void value_type; 837#if _LIBCPP_STD_VER > 17 838 typedef ptrdiff_t difference_type; 839#else 840 typedef void difference_type; 841#endif 842 typedef void pointer; 843 typedef void reference; 844 typedef _Container container_type; 845 846 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 847 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_) 848 {container->push_back(__value_); return *this;} 849#ifndef _LIBCPP_CXX03_LANG 850 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_) 851 {container->push_back(_VSTD::move(__value_)); return *this;} 852#endif // _LIBCPP_CXX03_LANG 853 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator*() {return *this;} 854 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator++() {return *this;} 855 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator operator++(int) {return *this;} 856}; 857 858template <class _Container> 859inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 860back_insert_iterator<_Container> 861back_inserter(_Container& __x) 862{ 863 return back_insert_iterator<_Container>(__x); 864} 865 866_LIBCPP_SUPPRESS_DEPRECATED_PUSH 867template <class _Container> 868class _LIBCPP_TEMPLATE_VIS front_insert_iterator 869#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 870 : public iterator<output_iterator_tag, void, void, void, void> 871#endif 872{ 873_LIBCPP_SUPPRESS_DEPRECATED_POP 874protected: 875 _Container* container; 876public: 877 typedef output_iterator_tag iterator_category; 878 typedef void value_type; 879#if _LIBCPP_STD_VER > 17 880 typedef ptrdiff_t difference_type; 881#else 882 typedef void difference_type; 883#endif 884 typedef void pointer; 885 typedef void reference; 886 typedef _Container container_type; 887 888 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 889 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) 890 {container->push_front(__value_); return *this;} 891#ifndef _LIBCPP_CXX03_LANG 892 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) 893 {container->push_front(_VSTD::move(__value_)); return *this;} 894#endif // _LIBCPP_CXX03_LANG 895 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator*() {return *this;} 896 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator++() {return *this;} 897 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator operator++(int) {return *this;} 898}; 899 900template <class _Container> 901inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 902front_insert_iterator<_Container> 903front_inserter(_Container& __x) 904{ 905 return front_insert_iterator<_Container>(__x); 906} 907 908_LIBCPP_SUPPRESS_DEPRECATED_PUSH 909template <class _Container> 910class _LIBCPP_TEMPLATE_VIS insert_iterator 911#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 912 : public iterator<output_iterator_tag, void, void, void, void> 913#endif 914{ 915_LIBCPP_SUPPRESS_DEPRECATED_POP 916protected: 917 _Container* container; 918 typename _Container::iterator iter; // FIXME: `ranges::iterator_t<Container>` in C++20 mode 919public: 920 typedef output_iterator_tag iterator_category; 921 typedef void value_type; 922#if _LIBCPP_STD_VER > 17 923 typedef ptrdiff_t difference_type; 924#else 925 typedef void difference_type; 926#endif 927 typedef void pointer; 928 typedef void reference; 929 typedef _Container container_type; 930 931 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, typename _Container::iterator __i) 932 : container(_VSTD::addressof(__x)), iter(__i) {} 933 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(const typename _Container::value_type& __value_) 934 {iter = container->insert(iter, __value_); ++iter; return *this;} 935#ifndef _LIBCPP_CXX03_LANG 936 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(typename _Container::value_type&& __value_) 937 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 938#endif // _LIBCPP_CXX03_LANG 939 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator*() {return *this;} 940 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++() {return *this;} 941 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int) {return *this;} 942}; 943 944template <class _Container> 945inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 946insert_iterator<_Container> 947inserter(_Container& __x, typename _Container::iterator __i) 948{ 949 return insert_iterator<_Container>(__x, __i); 950} 951 952_LIBCPP_SUPPRESS_DEPRECATED_PUSH 953template <class _Tp, class _CharT = char, 954 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 955class _LIBCPP_TEMPLATE_VIS istream_iterator 956#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 957 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 958#endif 959{ 960_LIBCPP_SUPPRESS_DEPRECATED_POP 961public: 962 typedef input_iterator_tag iterator_category; 963 typedef _Tp value_type; 964 typedef _Distance difference_type; 965 typedef const _Tp* pointer; 966 typedef const _Tp& reference; 967 typedef _CharT char_type; 968 typedef _Traits traits_type; 969 typedef basic_istream<_CharT,_Traits> istream_type; 970private: 971 istream_type* __in_stream_; 972 _Tp __value_; 973public: 974 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 975 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 976 { 977 if (!(*__in_stream_ >> __value_)) 978 __in_stream_ = nullptr; 979 } 980 981 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 982 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 983 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 984 { 985 if (!(*__in_stream_ >> __value_)) 986 __in_stream_ = nullptr; 987 return *this; 988 } 989 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 990 {istream_iterator __t(*this); ++(*this); return __t;} 991 992 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 993 friend _LIBCPP_INLINE_VISIBILITY 994 bool 995 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 996 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 997 998 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 999 friend _LIBCPP_INLINE_VISIBILITY 1000 bool 1001 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1002 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1003}; 1004 1005template <class _Tp, class _CharT, class _Traits, class _Distance> 1006inline _LIBCPP_INLINE_VISIBILITY 1007bool 1008operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1009 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1010{ 1011 return __x.__in_stream_ == __y.__in_stream_; 1012} 1013 1014template <class _Tp, class _CharT, class _Traits, class _Distance> 1015inline _LIBCPP_INLINE_VISIBILITY 1016bool 1017operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1018 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1019{ 1020 return !(__x == __y); 1021} 1022 1023_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1024template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 1025class _LIBCPP_TEMPLATE_VIS ostream_iterator 1026#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1027 : public iterator<output_iterator_tag, void, void, void, void> 1028#endif 1029{ 1030_LIBCPP_SUPPRESS_DEPRECATED_POP 1031public: 1032 typedef output_iterator_tag iterator_category; 1033 typedef void value_type; 1034#if _LIBCPP_STD_VER > 17 1035 typedef ptrdiff_t difference_type; 1036#else 1037 typedef void difference_type; 1038#endif 1039 typedef void pointer; 1040 typedef void reference; 1041 typedef _CharT char_type; 1042 typedef _Traits traits_type; 1043 typedef basic_ostream<_CharT, _Traits> ostream_type; 1044 1045private: 1046 ostream_type* __out_stream_; 1047 const char_type* __delim_; 1048public: 1049 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 1050 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 1051 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 1052 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 1053 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1054 { 1055 *__out_stream_ << __value_; 1056 if (__delim_) 1057 *__out_stream_ << __delim_; 1058 return *this; 1059 } 1060 1061 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1062 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1063 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1064}; 1065 1066_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1067template<class _CharT, class _Traits> 1068class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1069#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1070 : public iterator<input_iterator_tag, _CharT, 1071 typename _Traits::off_type, _CharT*, 1072 _CharT> 1073#endif 1074{ 1075_LIBCPP_SUPPRESS_DEPRECATED_POP 1076public: 1077 typedef input_iterator_tag iterator_category; 1078 typedef _CharT value_type; 1079 typedef typename _Traits::off_type difference_type; 1080 typedef _CharT* pointer; 1081 typedef _CharT reference; 1082 typedef _CharT char_type; 1083 typedef _Traits traits_type; 1084 typedef typename _Traits::int_type int_type; 1085 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1086 typedef basic_istream<_CharT,_Traits> istream_type; 1087private: 1088 mutable streambuf_type* __sbuf_; 1089 1090 class __proxy 1091 { 1092 char_type __keep_; 1093 streambuf_type* __sbuf_; 1094 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1095 : __keep_(__c), __sbuf_(__s) {} 1096 friend class istreambuf_iterator; 1097 public: 1098 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1099 }; 1100 1101 _LIBCPP_INLINE_VISIBILITY 1102 bool __test_for_eof() const 1103 { 1104 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1105 __sbuf_ = nullptr; 1106 return __sbuf_ == nullptr; 1107 } 1108public: 1109 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 1110 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1111 : __sbuf_(__s.rdbuf()) {} 1112 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1113 : __sbuf_(__s) {} 1114 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1115 : __sbuf_(__p.__sbuf_) {} 1116 1117 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1118 {return static_cast<char_type>(__sbuf_->sgetc());} 1119 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1120 { 1121 __sbuf_->sbumpc(); 1122 return *this; 1123 } 1124 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1125 { 1126 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1127 } 1128 1129 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1130 {return __test_for_eof() == __b.__test_for_eof();} 1131}; 1132 1133template <class _CharT, class _Traits> 1134inline _LIBCPP_INLINE_VISIBILITY 1135bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1136 const istreambuf_iterator<_CharT,_Traits>& __b) 1137 {return __a.equal(__b);} 1138 1139template <class _CharT, class _Traits> 1140inline _LIBCPP_INLINE_VISIBILITY 1141bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1142 const istreambuf_iterator<_CharT,_Traits>& __b) 1143 {return !__a.equal(__b);} 1144 1145_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1146template <class _CharT, class _Traits> 1147class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1148#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1149 : public iterator<output_iterator_tag, void, void, void, void> 1150#endif 1151{ 1152_LIBCPP_SUPPRESS_DEPRECATED_POP 1153public: 1154 typedef output_iterator_tag iterator_category; 1155 typedef void value_type; 1156#if _LIBCPP_STD_VER > 17 1157 typedef ptrdiff_t difference_type; 1158#else 1159 typedef void difference_type; 1160#endif 1161 typedef void pointer; 1162 typedef void reference; 1163 typedef _CharT char_type; 1164 typedef _Traits traits_type; 1165 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1166 typedef basic_ostream<_CharT, _Traits> ostream_type; 1167 1168private: 1169 streambuf_type* __sbuf_; 1170public: 1171 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1172 : __sbuf_(__s.rdbuf()) {} 1173 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1174 : __sbuf_(__s) {} 1175 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1176 { 1177 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1178 __sbuf_ = nullptr; 1179 return *this; 1180 } 1181 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1182 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1183 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1184 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1185 1186 template <class _Ch, class _Tr> 1187 friend 1188 _LIBCPP_HIDDEN 1189 ostreambuf_iterator<_Ch, _Tr> 1190 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1191 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1192 ios_base& __iob, _Ch __fl); 1193}; 1194 1195template <class _Iter> 1196class _LIBCPP_TEMPLATE_VIS move_iterator 1197{ 1198private: 1199 _Iter __i; 1200public: 1201 typedef _Iter iterator_type; 1202 typedef typename iterator_traits<iterator_type>::value_type value_type; 1203 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1204 typedef iterator_type pointer; 1205 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 1206 random_access_iterator_tag, 1207 typename iterator_traits<_Iter>::iterator_category> iterator_category; 1208#if _LIBCPP_STD_VER > 17 1209 typedef input_iterator_tag iterator_concept; 1210#endif 1211 1212#ifndef _LIBCPP_CXX03_LANG 1213 typedef typename iterator_traits<iterator_type>::reference __reference; 1214 typedef typename conditional< 1215 is_reference<__reference>::value, 1216 typename remove_reference<__reference>::type&&, 1217 __reference 1218 >::type reference; 1219#else 1220 typedef typename iterator_traits<iterator_type>::reference reference; 1221#endif 1222 1223 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1224 move_iterator() : __i() {} 1225 1226 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1227 explicit move_iterator(_Iter __x) : __i(__x) {} 1228 1229 template <class _Up, class = _EnableIf< 1230 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 1231 > > 1232 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1233 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1234 1235 template <class _Up, class = _EnableIf< 1236 !is_same<_Up, _Iter>::value && 1237 is_convertible<_Up const&, _Iter>::value && 1238 is_assignable<_Iter&, _Up const&>::value 1239 > > 1240 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1241 move_iterator& operator=(const move_iterator<_Up>& __u) { 1242 __i = __u.base(); 1243 return *this; 1244 } 1245 1246 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1247 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1248 reference operator*() const { return static_cast<reference>(*__i); } 1249 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1250 pointer operator->() const { return __i;} 1251 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1252 move_iterator& operator++() {++__i; return *this;} 1253 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1254 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1255 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1256 move_iterator& operator--() {--__i; return *this;} 1257 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1258 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1259 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1260 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1261 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1262 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1263 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1264 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1265 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1266 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1267 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1268 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1269}; 1270 1271template <class _Iter1, class _Iter2> 1272inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1273bool 1274operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1275{ 1276 return __x.base() == __y.base(); 1277} 1278 1279template <class _Iter1, class _Iter2> 1280inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1281bool 1282operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1283{ 1284 return __x.base() < __y.base(); 1285} 1286 1287template <class _Iter1, class _Iter2> 1288inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1289bool 1290operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1291{ 1292 return __x.base() != __y.base(); 1293} 1294 1295template <class _Iter1, class _Iter2> 1296inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1297bool 1298operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1299{ 1300 return __x.base() > __y.base(); 1301} 1302 1303template <class _Iter1, class _Iter2> 1304inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1305bool 1306operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1307{ 1308 return __x.base() >= __y.base(); 1309} 1310 1311template <class _Iter1, class _Iter2> 1312inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1313bool 1314operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1315{ 1316 return __x.base() <= __y.base(); 1317} 1318 1319#ifndef _LIBCPP_CXX03_LANG 1320template <class _Iter1, class _Iter2> 1321inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1322auto 1323operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1324-> decltype(__x.base() - __y.base()) 1325{ 1326 return __x.base() - __y.base(); 1327} 1328#else 1329template <class _Iter1, class _Iter2> 1330inline _LIBCPP_INLINE_VISIBILITY 1331typename move_iterator<_Iter1>::difference_type 1332operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1333{ 1334 return __x.base() - __y.base(); 1335} 1336#endif 1337 1338template <class _Iter> 1339inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1340move_iterator<_Iter> 1341operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1342{ 1343 return move_iterator<_Iter>(__x.base() + __n); 1344} 1345 1346template <class _Iter> 1347inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1348move_iterator<_Iter> 1349make_move_iterator(_Iter __i) 1350{ 1351 return move_iterator<_Iter>(__i); 1352} 1353 1354// __wrap_iter 1355 1356template <class _Iter> class __wrap_iter; 1357 1358template <class _Iter1, class _Iter2> 1359_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1360bool 1361operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1362 1363template <class _Iter1, class _Iter2> 1364_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1365bool 1366operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1367 1368template <class _Iter1, class _Iter2> 1369_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1370bool 1371operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1372 1373template <class _Iter1, class _Iter2> 1374_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1375bool 1376operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1377 1378template <class _Iter1, class _Iter2> 1379_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1380bool 1381operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1382 1383template <class _Iter1, class _Iter2> 1384_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1385bool 1386operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1387 1388#ifndef _LIBCPP_CXX03_LANG 1389template <class _Iter1, class _Iter2> 1390_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1391auto 1392operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1393-> decltype(__x.base() - __y.base()); 1394#else 1395template <class _Iter1, class _Iter2> 1396_LIBCPP_INLINE_VISIBILITY 1397typename __wrap_iter<_Iter1>::difference_type 1398operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1399#endif 1400 1401template <class _Iter> 1402_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1403__wrap_iter<_Iter> 1404operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1405 1406template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1407template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1408template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1409template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1410 1411template <class _Iter> 1412class __wrap_iter 1413{ 1414public: 1415 typedef _Iter iterator_type; 1416 typedef typename iterator_traits<iterator_type>::value_type value_type; 1417 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1418 typedef typename iterator_traits<iterator_type>::pointer pointer; 1419 typedef typename iterator_traits<iterator_type>::reference reference; 1420 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1421#if _LIBCPP_STD_VER > 17 1422 typedef contiguous_iterator_tag iterator_concept; 1423#endif 1424 1425private: 1426 iterator_type __i; 1427public: 1428 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1429#if _LIBCPP_STD_VER > 11 1430 : __i{} 1431#endif 1432 { 1433#if _LIBCPP_DEBUG_LEVEL == 2 1434 __get_db()->__insert_i(this); 1435#endif 1436 } 1437 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1438 __wrap_iter(const __wrap_iter<_Up>& __u, 1439 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1440 : __i(__u.base()) 1441 { 1442#if _LIBCPP_DEBUG_LEVEL == 2 1443 __get_db()->__iterator_copy(this, &__u); 1444#endif 1445 } 1446#if _LIBCPP_DEBUG_LEVEL == 2 1447 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1448 __wrap_iter(const __wrap_iter& __x) 1449 : __i(__x.base()) 1450 { 1451 __get_db()->__iterator_copy(this, &__x); 1452 } 1453 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1454 __wrap_iter& operator=(const __wrap_iter& __x) 1455 { 1456 if (this != &__x) 1457 { 1458 __get_db()->__iterator_copy(this, &__x); 1459 __i = __x.__i; 1460 } 1461 return *this; 1462 } 1463 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1464 ~__wrap_iter() 1465 { 1466 __get_db()->__erase_i(this); 1467 } 1468#endif 1469 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1470 { 1471#if _LIBCPP_DEBUG_LEVEL == 2 1472 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1473 "Attempted to dereference a non-dereferenceable iterator"); 1474#endif 1475 return *__i; 1476 } 1477 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1478 { 1479#if _LIBCPP_DEBUG_LEVEL == 2 1480 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1481 "Attempted to dereference a non-dereferenceable iterator"); 1482#endif 1483 return _VSTD::__to_address(__i); 1484 } 1485 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1486 { 1487#if _LIBCPP_DEBUG_LEVEL == 2 1488 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1489 "Attempted to increment a non-incrementable iterator"); 1490#endif 1491 ++__i; 1492 return *this; 1493 } 1494 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1495 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1496 1497 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1498 { 1499#if _LIBCPP_DEBUG_LEVEL == 2 1500 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1501 "Attempted to decrement a non-decrementable iterator"); 1502#endif 1503 --__i; 1504 return *this; 1505 } 1506 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1507 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1508 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1509 {__wrap_iter __w(*this); __w += __n; return __w;} 1510 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1511 { 1512#if _LIBCPP_DEBUG_LEVEL == 2 1513 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1514 "Attempted to add/subtract an iterator outside its valid range"); 1515#endif 1516 __i += __n; 1517 return *this; 1518 } 1519 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1520 {return *this + (-__n);} 1521 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1522 {*this += -__n; return *this;} 1523 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1524 { 1525#if _LIBCPP_DEBUG_LEVEL == 2 1526 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1527 "Attempted to subscript an iterator outside its valid range"); 1528#endif 1529 return __i[__n]; 1530 } 1531 1532 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1533 1534private: 1535#if _LIBCPP_DEBUG_LEVEL == 2 1536 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1537 { 1538 __get_db()->__insert_ic(this, __p); 1539 } 1540#else 1541 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1542#endif 1543 1544 template <class _Up> friend class __wrap_iter; 1545 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1546 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1547 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1548 1549 template <class _Iter1, class _Iter2> 1550 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1551 bool 1552 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1553 1554 template <class _Iter1, class _Iter2> 1555 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1556 bool 1557 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1558 1559 template <class _Iter1, class _Iter2> 1560 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1561 bool 1562 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1563 1564 template <class _Iter1, class _Iter2> 1565 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1566 bool 1567 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1568 1569 template <class _Iter1, class _Iter2> 1570 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1571 bool 1572 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1573 1574 template <class _Iter1, class _Iter2> 1575 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1576 bool 1577 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1578 1579#ifndef _LIBCPP_CXX03_LANG 1580 template <class _Iter1, class _Iter2> 1581 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1582 auto 1583 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1584 -> decltype(__x.base() - __y.base()); 1585#else 1586 template <class _Iter1, class _Iter2> 1587 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1588 typename __wrap_iter<_Iter1>::difference_type 1589 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1590#endif 1591 1592 template <class _Iter1> 1593 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1594 __wrap_iter<_Iter1> 1595 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1596}; 1597 1598#if _LIBCPP_STD_VER <= 17 1599template <class _It> 1600struct __is_cpp17_contiguous_iterator<__wrap_iter<_It> > : true_type {}; 1601#endif 1602 1603template <class _Iter> 1604_LIBCPP_CONSTEXPR 1605decltype(_VSTD::__to_address(declval<_Iter>())) 1606__to_address(__wrap_iter<_Iter> __w) _NOEXCEPT { 1607 return _VSTD::__to_address(__w.base()); 1608} 1609 1610template <class _Iter1, class _Iter2> 1611inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1612bool 1613operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1614{ 1615 return __x.base() == __y.base(); 1616} 1617 1618template <class _Iter1, class _Iter2> 1619inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1620bool 1621operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1622{ 1623#if _LIBCPP_DEBUG_LEVEL == 2 1624 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1625 "Attempted to compare incomparable iterators"); 1626#endif 1627 return __x.base() < __y.base(); 1628} 1629 1630template <class _Iter1, class _Iter2> 1631inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1632bool 1633operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1634{ 1635 return !(__x == __y); 1636} 1637 1638template <class _Iter1, class _Iter2> 1639inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1640bool 1641operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1642{ 1643 return __y < __x; 1644} 1645 1646template <class _Iter1, class _Iter2> 1647inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1648bool 1649operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1650{ 1651 return !(__x < __y); 1652} 1653 1654template <class _Iter1, class _Iter2> 1655inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1656bool 1657operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1658{ 1659 return !(__y < __x); 1660} 1661 1662template <class _Iter1> 1663inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1664bool 1665operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1666{ 1667 return !(__x == __y); 1668} 1669 1670template <class _Iter1> 1671inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1672bool 1673operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1674{ 1675 return __y < __x; 1676} 1677 1678template <class _Iter1> 1679inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1680bool 1681operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1682{ 1683 return !(__x < __y); 1684} 1685 1686template <class _Iter1> 1687inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1688bool 1689operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1690{ 1691 return !(__y < __x); 1692} 1693 1694#ifndef _LIBCPP_CXX03_LANG 1695template <class _Iter1, class _Iter2> 1696inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1697auto 1698operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1699-> decltype(__x.base() - __y.base()) 1700{ 1701#if _LIBCPP_DEBUG_LEVEL == 2 1702 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1703 "Attempted to subtract incompatible iterators"); 1704#endif 1705 return __x.base() - __y.base(); 1706} 1707#else 1708template <class _Iter1, class _Iter2> 1709inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1710typename __wrap_iter<_Iter1>::difference_type 1711operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1712{ 1713#if _LIBCPP_DEBUG_LEVEL == 2 1714 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1715 "Attempted to subtract incompatible iterators"); 1716#endif 1717 return __x.base() - __y.base(); 1718} 1719#endif 1720 1721template <class _Iter> 1722inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1723__wrap_iter<_Iter> 1724operator+(typename __wrap_iter<_Iter>::difference_type __n, 1725 __wrap_iter<_Iter> __x) _NOEXCEPT 1726{ 1727 __x += __n; 1728 return __x; 1729} 1730 1731template <class _Tp, size_t _Np> 1732_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1733_Tp* 1734begin(_Tp (&__array)[_Np]) 1735{ 1736 return __array; 1737} 1738 1739template <class _Tp, size_t _Np> 1740_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1741_Tp* 1742end(_Tp (&__array)[_Np]) 1743{ 1744 return __array + _Np; 1745} 1746 1747#if !defined(_LIBCPP_CXX03_LANG) 1748 1749template <class _Cp> 1750_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1751auto 1752begin(_Cp& __c) -> decltype(__c.begin()) 1753{ 1754 return __c.begin(); 1755} 1756 1757template <class _Cp> 1758_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1759auto 1760begin(const _Cp& __c) -> decltype(__c.begin()) 1761{ 1762 return __c.begin(); 1763} 1764 1765template <class _Cp> 1766_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1767auto 1768end(_Cp& __c) -> decltype(__c.end()) 1769{ 1770 return __c.end(); 1771} 1772 1773template <class _Cp> 1774_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1775auto 1776end(const _Cp& __c) -> decltype(__c.end()) 1777{ 1778 return __c.end(); 1779} 1780 1781#if _LIBCPP_STD_VER > 11 1782 1783template <class _Tp, size_t _Np> 1784_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1785reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1786{ 1787 return reverse_iterator<_Tp*>(__array + _Np); 1788} 1789 1790template <class _Tp, size_t _Np> 1791_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1792reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1793{ 1794 return reverse_iterator<_Tp*>(__array); 1795} 1796 1797template <class _Ep> 1798_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1799reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1800{ 1801 return reverse_iterator<const _Ep*>(__il.end()); 1802} 1803 1804template <class _Ep> 1805_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1806reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1807{ 1808 return reverse_iterator<const _Ep*>(__il.begin()); 1809} 1810 1811template <class _Cp> 1812_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1813auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1814{ 1815 return _VSTD::begin(__c); 1816} 1817 1818template <class _Cp> 1819_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1820auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1821{ 1822 return _VSTD::end(__c); 1823} 1824 1825template <class _Cp> 1826_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1827auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1828{ 1829 return __c.rbegin(); 1830} 1831 1832template <class _Cp> 1833_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1834auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1835{ 1836 return __c.rbegin(); 1837} 1838 1839template <class _Cp> 1840_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1841auto rend(_Cp& __c) -> decltype(__c.rend()) 1842{ 1843 return __c.rend(); 1844} 1845 1846template <class _Cp> 1847_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1848auto rend(const _Cp& __c) -> decltype(__c.rend()) 1849{ 1850 return __c.rend(); 1851} 1852 1853template <class _Cp> 1854_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1855auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1856{ 1857 return _VSTD::rbegin(__c); 1858} 1859 1860template <class _Cp> 1861_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1862auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1863{ 1864 return _VSTD::rend(__c); 1865} 1866 1867#endif 1868 1869 1870#else // defined(_LIBCPP_CXX03_LANG) 1871 1872template <class _Cp> 1873_LIBCPP_INLINE_VISIBILITY 1874typename _Cp::iterator 1875begin(_Cp& __c) 1876{ 1877 return __c.begin(); 1878} 1879 1880template <class _Cp> 1881_LIBCPP_INLINE_VISIBILITY 1882typename _Cp::const_iterator 1883begin(const _Cp& __c) 1884{ 1885 return __c.begin(); 1886} 1887 1888template <class _Cp> 1889_LIBCPP_INLINE_VISIBILITY 1890typename _Cp::iterator 1891end(_Cp& __c) 1892{ 1893 return __c.end(); 1894} 1895 1896template <class _Cp> 1897_LIBCPP_INLINE_VISIBILITY 1898typename _Cp::const_iterator 1899end(const _Cp& __c) 1900{ 1901 return __c.end(); 1902} 1903 1904#endif // !defined(_LIBCPP_CXX03_LANG) 1905 1906#if _LIBCPP_STD_VER > 14 1907 1908// #if _LIBCPP_STD_VER > 11 1909// template <> 1910// struct _LIBCPP_TEMPLATE_VIS plus<void> 1911// { 1912// template <class _T1, class _T2> 1913// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1914// auto operator()(_T1&& __t, _T2&& __u) const 1915// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1916// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1917// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1918// typedef void is_transparent; 1919// }; 1920// #endif 1921 1922template <class _Cont> 1923_LIBCPP_INLINE_VISIBILITY 1924constexpr auto size(const _Cont& __c) 1925_NOEXCEPT_(noexcept(__c.size())) 1926-> decltype (__c.size()) 1927{ return __c.size(); } 1928 1929template <class _Tp, size_t _Sz> 1930_LIBCPP_INLINE_VISIBILITY 1931constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1932 1933#if _LIBCPP_STD_VER > 17 1934template <class _Cont> 1935_LIBCPP_INLINE_VISIBILITY 1936constexpr auto ssize(const _Cont& __c) 1937_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1938-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1939{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1940 1941template <class _Tp, ptrdiff_t _Sz> 1942_LIBCPP_INLINE_VISIBILITY 1943constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1944#endif 1945 1946template <class _Cont> 1947_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1948constexpr auto empty(const _Cont& __c) 1949_NOEXCEPT_(noexcept(__c.empty())) 1950-> decltype (__c.empty()) 1951{ return __c.empty(); } 1952 1953template <class _Tp, size_t _Sz> 1954_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1955constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1956 1957template <class _Ep> 1958_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1959constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1960 1961template <class _Cont> constexpr 1962_LIBCPP_INLINE_VISIBILITY 1963auto data(_Cont& __c) 1964_NOEXCEPT_(noexcept(__c.data())) 1965-> decltype (__c.data()) 1966{ return __c.data(); } 1967 1968template <class _Cont> constexpr 1969_LIBCPP_INLINE_VISIBILITY 1970auto data(const _Cont& __c) 1971_NOEXCEPT_(noexcept(__c.data())) 1972-> decltype (__c.data()) 1973{ return __c.data(); } 1974 1975template <class _Tp, size_t _Sz> 1976_LIBCPP_INLINE_VISIBILITY 1977constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1978 1979template <class _Ep> 1980_LIBCPP_INLINE_VISIBILITY 1981constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1982#endif 1983 1984template <class _Container, class _Predicate> 1985typename _Container::size_type 1986__libcpp_erase_if_container(_Container& __c, _Predicate& __pred) { 1987 typename _Container::size_type __old_size = __c.size(); 1988 1989 const typename _Container::iterator __last = __c.end(); 1990 for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) { 1991 if (__pred(*__iter)) 1992 __iter = __c.erase(__iter); 1993 else 1994 ++__iter; 1995 } 1996 1997 return __old_size - __c.size(); 1998} 1999 2000_LIBCPP_END_NAMESPACE_STD 2001 2002#endif // _LIBCPP_ITERATOR 2003