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/indirect_concepts.h> 558#include <__iterator/iter_move.h> 559#include <__iterator/iterator_traits.h> 560#include <__iterator/next.h> 561#include <__iterator/prev.h> 562#include <__iterator/projected.h> 563#include <__iterator/readable_traits.h> 564#include <__memory/addressof.h> 565#include <__memory/pointer_traits.h> 566#include <compare> 567#include <concepts> // Mandated by the Standard. 568#include <cstddef> 569#include <initializer_list> 570#include <iosfwd> // for forward declarations of vector and string 571#include <type_traits> 572#include <version> 573 574#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 575#pragma GCC system_header 576#endif 577 578_LIBCPP_BEGIN_NAMESPACE_STD 579 580template<class _Category, class _Tp, class _Distance = ptrdiff_t, 581 class _Pointer = _Tp*, class _Reference = _Tp&> 582struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 iterator 583{ 584 typedef _Tp value_type; 585 typedef _Distance difference_type; 586 typedef _Pointer pointer; 587 typedef _Reference reference; 588 typedef _Category iterator_category; 589}; 590 591template <class _InputIter> 592inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 593typename iterator_traits<_InputIter>::difference_type 594__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 595{ 596 typename iterator_traits<_InputIter>::difference_type __r(0); 597 for (; __first != __last; ++__first) 598 ++__r; 599 return __r; 600} 601 602template <class _RandIter> 603inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 604typename iterator_traits<_RandIter>::difference_type 605__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 606{ 607 return __last - __first; 608} 609 610template <class _InputIter> 611inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 612typename iterator_traits<_InputIter>::difference_type 613distance(_InputIter __first, _InputIter __last) 614{ 615 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 616} 617 618template <class _Tp, class = void> 619struct __is_stashing_iterator : false_type {}; 620 621template <class _Tp> 622struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 623 : true_type {}; 624 625_LIBCPP_SUPPRESS_DEPRECATED_PUSH 626template <class _Iter> 627class _LIBCPP_TEMPLATE_VIS reverse_iterator 628#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 629 : public iterator<typename iterator_traits<_Iter>::iterator_category, 630 typename iterator_traits<_Iter>::value_type, 631 typename iterator_traits<_Iter>::difference_type, 632 typename iterator_traits<_Iter>::pointer, 633 typename iterator_traits<_Iter>::reference> 634#endif 635{ 636_LIBCPP_SUPPRESS_DEPRECATED_POP 637private: 638#ifndef _LIBCPP_ABI_NO_ITERATOR_BASES 639 _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 640#endif 641 642 static_assert(!__is_stashing_iterator<_Iter>::value, 643 "The specified iterator type cannot be used with reverse_iterator; " 644 "Using stashing iterators with reverse_iterator causes undefined behavior"); 645 646protected: 647 _Iter current; 648public: 649 typedef _Iter iterator_type; 650 typedef typename iterator_traits<_Iter>::difference_type difference_type; 651 typedef typename iterator_traits<_Iter>::reference reference; 652 typedef typename iterator_traits<_Iter>::pointer pointer; 653 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 654 random_access_iterator_tag, 655 typename iterator_traits<_Iter>::iterator_category> iterator_category; 656 typedef typename iterator_traits<_Iter>::value_type value_type; 657 658#if _LIBCPP_STD_VER > 17 659 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 660 random_access_iterator_tag, 661 bidirectional_iterator_tag> iterator_concept; 662#endif 663 664#ifndef _LIBCPP_ABI_NO_ITERATOR_BASES 665 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 666 reverse_iterator() : __t(), current() {} 667 668 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 669 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 670 671 template <class _Up, class = _EnableIf< 672 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 673 > > 674 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 675 reverse_iterator(const reverse_iterator<_Up>& __u) 676 : __t(__u.base()), current(__u.base()) 677 { } 678 679 template <class _Up, class = _EnableIf< 680 !is_same<_Up, _Iter>::value && 681 is_convertible<_Up const&, _Iter>::value && 682 is_assignable<_Up const&, _Iter>::value 683 > > 684 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 685 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) { 686 __t = current = __u.base(); 687 return *this; 688 } 689#else 690 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 691 reverse_iterator() : current() {} 692 693 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 694 explicit reverse_iterator(_Iter __x) : current(__x) {} 695 696 template <class _Up, class = _EnableIf< 697 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 698 > > 699 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 700 reverse_iterator(const reverse_iterator<_Up>& __u) 701 : current(__u.base()) 702 { } 703 704 template <class _Up, class = _EnableIf< 705 !is_same<_Up, _Iter>::value && 706 is_convertible<_Up const&, _Iter>::value && 707 is_assignable<_Up const&, _Iter>::value 708 > > 709 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 710 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) { 711 current = __u.base(); 712 return *this; 713 } 714#endif 715 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 716 _Iter base() const {return current;} 717 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 718 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 719 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 720 pointer operator->() const {return _VSTD::addressof(operator*());} 721 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 722 reverse_iterator& operator++() {--current; return *this;} 723 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 724 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 725 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 726 reverse_iterator& operator--() {++current; return *this;} 727 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 728 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 729 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 730 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 731 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 732 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 733 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 734 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 735 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 736 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 737 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 738 reference operator[](difference_type __n) const {return *(*this + __n);} 739}; 740 741template <class _Iter1, class _Iter2> 742inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 743bool 744operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 745{ 746 return __x.base() == __y.base(); 747} 748 749template <class _Iter1, class _Iter2> 750inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 751bool 752operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 753{ 754 return __x.base() > __y.base(); 755} 756 757template <class _Iter1, class _Iter2> 758inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 759bool 760operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 761{ 762 return __x.base() != __y.base(); 763} 764 765template <class _Iter1, class _Iter2> 766inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 767bool 768operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 769{ 770 return __x.base() < __y.base(); 771} 772 773template <class _Iter1, class _Iter2> 774inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 775bool 776operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 777{ 778 return __x.base() <= __y.base(); 779} 780 781template <class _Iter1, class _Iter2> 782inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 783bool 784operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 785{ 786 return __x.base() >= __y.base(); 787} 788 789#ifndef _LIBCPP_CXX03_LANG 790template <class _Iter1, class _Iter2> 791inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 792auto 793operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 794-> decltype(__y.base() - __x.base()) 795{ 796 return __y.base() - __x.base(); 797} 798#else 799template <class _Iter1, class _Iter2> 800inline _LIBCPP_INLINE_VISIBILITY 801typename reverse_iterator<_Iter1>::difference_type 802operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 803{ 804 return __y.base() - __x.base(); 805} 806#endif 807 808template <class _Iter> 809inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 810reverse_iterator<_Iter> 811operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 812{ 813 return reverse_iterator<_Iter>(__x.base() - __n); 814} 815 816#if _LIBCPP_STD_VER > 11 817template <class _Iter> 818inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 819reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 820{ 821 return reverse_iterator<_Iter>(__i); 822} 823#endif 824 825_LIBCPP_SUPPRESS_DEPRECATED_PUSH 826template <class _Container> 827class _LIBCPP_TEMPLATE_VIS back_insert_iterator 828#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 829 : public iterator<output_iterator_tag, void, void, void, void> 830#endif 831{ 832_LIBCPP_SUPPRESS_DEPRECATED_POP 833protected: 834 _Container* container; 835public: 836 typedef output_iterator_tag iterator_category; 837 typedef void value_type; 838#if _LIBCPP_STD_VER > 17 839 typedef ptrdiff_t difference_type; 840#else 841 typedef void difference_type; 842#endif 843 typedef void pointer; 844 typedef void reference; 845 typedef _Container container_type; 846 847 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 848 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_) 849 {container->push_back(__value_); return *this;} 850#ifndef _LIBCPP_CXX03_LANG 851 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_) 852 {container->push_back(_VSTD::move(__value_)); return *this;} 853#endif // _LIBCPP_CXX03_LANG 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++() {return *this;} 856 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator operator++(int) {return *this;} 857}; 858 859template <class _Container> 860inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 861back_insert_iterator<_Container> 862back_inserter(_Container& __x) 863{ 864 return back_insert_iterator<_Container>(__x); 865} 866 867_LIBCPP_SUPPRESS_DEPRECATED_PUSH 868template <class _Container> 869class _LIBCPP_TEMPLATE_VIS front_insert_iterator 870#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 871 : public iterator<output_iterator_tag, void, void, void, void> 872#endif 873{ 874_LIBCPP_SUPPRESS_DEPRECATED_POP 875protected: 876 _Container* container; 877public: 878 typedef output_iterator_tag iterator_category; 879 typedef void value_type; 880#if _LIBCPP_STD_VER > 17 881 typedef ptrdiff_t difference_type; 882#else 883 typedef void difference_type; 884#endif 885 typedef void pointer; 886 typedef void reference; 887 typedef _Container container_type; 888 889 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 890 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) 891 {container->push_front(__value_); return *this;} 892#ifndef _LIBCPP_CXX03_LANG 893 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) 894 {container->push_front(_VSTD::move(__value_)); return *this;} 895#endif // _LIBCPP_CXX03_LANG 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++() {return *this;} 898 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator operator++(int) {return *this;} 899}; 900 901template <class _Container> 902inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 903front_insert_iterator<_Container> 904front_inserter(_Container& __x) 905{ 906 return front_insert_iterator<_Container>(__x); 907} 908 909_LIBCPP_SUPPRESS_DEPRECATED_PUSH 910template <class _Container> 911class _LIBCPP_TEMPLATE_VIS insert_iterator 912#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 913 : public iterator<output_iterator_tag, void, void, void, void> 914#endif 915{ 916_LIBCPP_SUPPRESS_DEPRECATED_POP 917protected: 918 _Container* container; 919 typename _Container::iterator iter; // FIXME: `ranges::iterator_t<Container>` in C++20 mode 920public: 921 typedef output_iterator_tag iterator_category; 922 typedef void value_type; 923#if _LIBCPP_STD_VER > 17 924 typedef ptrdiff_t difference_type; 925#else 926 typedef void difference_type; 927#endif 928 typedef void pointer; 929 typedef void reference; 930 typedef _Container container_type; 931 932 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, typename _Container::iterator __i) 933 : container(_VSTD::addressof(__x)), iter(__i) {} 934 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(const typename _Container::value_type& __value_) 935 {iter = container->insert(iter, __value_); ++iter; return *this;} 936#ifndef _LIBCPP_CXX03_LANG 937 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(typename _Container::value_type&& __value_) 938 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 939#endif // _LIBCPP_CXX03_LANG 940 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator*() {return *this;} 941 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++() {return *this;} 942 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int) {return *this;} 943}; 944 945template <class _Container> 946inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 947insert_iterator<_Container> 948inserter(_Container& __x, typename _Container::iterator __i) 949{ 950 return insert_iterator<_Container>(__x, __i); 951} 952 953_LIBCPP_SUPPRESS_DEPRECATED_PUSH 954template <class _Tp, class _CharT = char, 955 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 956class _LIBCPP_TEMPLATE_VIS istream_iterator 957#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 958 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 959#endif 960{ 961_LIBCPP_SUPPRESS_DEPRECATED_POP 962public: 963 typedef input_iterator_tag iterator_category; 964 typedef _Tp value_type; 965 typedef _Distance difference_type; 966 typedef const _Tp* pointer; 967 typedef const _Tp& reference; 968 typedef _CharT char_type; 969 typedef _Traits traits_type; 970 typedef basic_istream<_CharT,_Traits> istream_type; 971private: 972 istream_type* __in_stream_; 973 _Tp __value_; 974public: 975 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 976 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 977 { 978 if (!(*__in_stream_ >> __value_)) 979 __in_stream_ = nullptr; 980 } 981 982 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 983 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 984 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 985 { 986 if (!(*__in_stream_ >> __value_)) 987 __in_stream_ = nullptr; 988 return *this; 989 } 990 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 991 {istream_iterator __t(*this); ++(*this); return __t;} 992 993 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 994 friend _LIBCPP_INLINE_VISIBILITY 995 bool 996 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 997 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 998 999 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1000 friend _LIBCPP_INLINE_VISIBILITY 1001 bool 1002 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1003 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1004}; 1005 1006template <class _Tp, class _CharT, class _Traits, class _Distance> 1007inline _LIBCPP_INLINE_VISIBILITY 1008bool 1009operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1010 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1011{ 1012 return __x.__in_stream_ == __y.__in_stream_; 1013} 1014 1015template <class _Tp, class _CharT, class _Traits, class _Distance> 1016inline _LIBCPP_INLINE_VISIBILITY 1017bool 1018operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1019 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1020{ 1021 return !(__x == __y); 1022} 1023 1024_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1025template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 1026class _LIBCPP_TEMPLATE_VIS ostream_iterator 1027#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1028 : public iterator<output_iterator_tag, void, void, void, void> 1029#endif 1030{ 1031_LIBCPP_SUPPRESS_DEPRECATED_POP 1032public: 1033 typedef output_iterator_tag iterator_category; 1034 typedef void value_type; 1035#if _LIBCPP_STD_VER > 17 1036 typedef ptrdiff_t difference_type; 1037#else 1038 typedef void difference_type; 1039#endif 1040 typedef void pointer; 1041 typedef void reference; 1042 typedef _CharT char_type; 1043 typedef _Traits traits_type; 1044 typedef basic_ostream<_CharT, _Traits> ostream_type; 1045 1046private: 1047 ostream_type* __out_stream_; 1048 const char_type* __delim_; 1049public: 1050 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 1051 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 1052 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 1053 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 1054 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1055 { 1056 *__out_stream_ << __value_; 1057 if (__delim_) 1058 *__out_stream_ << __delim_; 1059 return *this; 1060 } 1061 1062 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1063 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1064 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1065}; 1066 1067_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1068template<class _CharT, class _Traits> 1069class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1070#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1071 : public iterator<input_iterator_tag, _CharT, 1072 typename _Traits::off_type, _CharT*, 1073 _CharT> 1074#endif 1075{ 1076_LIBCPP_SUPPRESS_DEPRECATED_POP 1077public: 1078 typedef input_iterator_tag iterator_category; 1079 typedef _CharT value_type; 1080 typedef typename _Traits::off_type difference_type; 1081 typedef _CharT* pointer; 1082 typedef _CharT reference; 1083 typedef _CharT char_type; 1084 typedef _Traits traits_type; 1085 typedef typename _Traits::int_type int_type; 1086 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1087 typedef basic_istream<_CharT,_Traits> istream_type; 1088private: 1089 mutable streambuf_type* __sbuf_; 1090 1091 class __proxy 1092 { 1093 char_type __keep_; 1094 streambuf_type* __sbuf_; 1095 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1096 : __keep_(__c), __sbuf_(__s) {} 1097 friend class istreambuf_iterator; 1098 public: 1099 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1100 }; 1101 1102 _LIBCPP_INLINE_VISIBILITY 1103 bool __test_for_eof() const 1104 { 1105 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1106 __sbuf_ = nullptr; 1107 return __sbuf_ == nullptr; 1108 } 1109public: 1110 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 1111 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1112 : __sbuf_(__s.rdbuf()) {} 1113 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1114 : __sbuf_(__s) {} 1115 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1116 : __sbuf_(__p.__sbuf_) {} 1117 1118 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1119 {return static_cast<char_type>(__sbuf_->sgetc());} 1120 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1121 { 1122 __sbuf_->sbumpc(); 1123 return *this; 1124 } 1125 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1126 { 1127 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1128 } 1129 1130 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1131 {return __test_for_eof() == __b.__test_for_eof();} 1132}; 1133 1134template <class _CharT, class _Traits> 1135inline _LIBCPP_INLINE_VISIBILITY 1136bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1137 const istreambuf_iterator<_CharT,_Traits>& __b) 1138 {return __a.equal(__b);} 1139 1140template <class _CharT, class _Traits> 1141inline _LIBCPP_INLINE_VISIBILITY 1142bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1143 const istreambuf_iterator<_CharT,_Traits>& __b) 1144 {return !__a.equal(__b);} 1145 1146_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1147template <class _CharT, class _Traits> 1148class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1149#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1150 : public iterator<output_iterator_tag, void, void, void, void> 1151#endif 1152{ 1153_LIBCPP_SUPPRESS_DEPRECATED_POP 1154public: 1155 typedef output_iterator_tag iterator_category; 1156 typedef void value_type; 1157#if _LIBCPP_STD_VER > 17 1158 typedef ptrdiff_t difference_type; 1159#else 1160 typedef void difference_type; 1161#endif 1162 typedef void pointer; 1163 typedef void reference; 1164 typedef _CharT char_type; 1165 typedef _Traits traits_type; 1166 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1167 typedef basic_ostream<_CharT, _Traits> ostream_type; 1168 1169private: 1170 streambuf_type* __sbuf_; 1171public: 1172 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1173 : __sbuf_(__s.rdbuf()) {} 1174 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1175 : __sbuf_(__s) {} 1176 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1177 { 1178 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1179 __sbuf_ = nullptr; 1180 return *this; 1181 } 1182 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1183 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1184 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1185 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1186 1187 template <class _Ch, class _Tr> 1188 friend 1189 _LIBCPP_HIDDEN 1190 ostreambuf_iterator<_Ch, _Tr> 1191 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1192 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1193 ios_base& __iob, _Ch __fl); 1194}; 1195 1196template <class _Iter> 1197class _LIBCPP_TEMPLATE_VIS move_iterator 1198{ 1199private: 1200 _Iter __i; 1201public: 1202 typedef _Iter iterator_type; 1203 typedef typename iterator_traits<iterator_type>::value_type value_type; 1204 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1205 typedef iterator_type pointer; 1206 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 1207 random_access_iterator_tag, 1208 typename iterator_traits<_Iter>::iterator_category> iterator_category; 1209#if _LIBCPP_STD_VER > 17 1210 typedef input_iterator_tag iterator_concept; 1211#endif 1212 1213#ifndef _LIBCPP_CXX03_LANG 1214 typedef typename iterator_traits<iterator_type>::reference __reference; 1215 typedef typename conditional< 1216 is_reference<__reference>::value, 1217 typename remove_reference<__reference>::type&&, 1218 __reference 1219 >::type reference; 1220#else 1221 typedef typename iterator_traits<iterator_type>::reference reference; 1222#endif 1223 1224 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1225 move_iterator() : __i() {} 1226 1227 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1228 explicit move_iterator(_Iter __x) : __i(__x) {} 1229 1230 template <class _Up, class = _EnableIf< 1231 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 1232 > > 1233 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1234 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1235 1236 template <class _Up, class = _EnableIf< 1237 !is_same<_Up, _Iter>::value && 1238 is_convertible<_Up const&, _Iter>::value && 1239 is_assignable<_Iter&, _Up const&>::value 1240 > > 1241 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1242 move_iterator& operator=(const move_iterator<_Up>& __u) { 1243 __i = __u.base(); 1244 return *this; 1245 } 1246 1247 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1248 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1249 reference operator*() const { return static_cast<reference>(*__i); } 1250 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1251 pointer operator->() const { return __i;} 1252 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1253 move_iterator& operator++() {++__i; return *this;} 1254 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1255 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1256 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1257 move_iterator& operator--() {--__i; return *this;} 1258 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1259 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1260 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1261 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1262 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1263 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1264 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1265 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1266 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1267 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1268 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1269 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1270}; 1271 1272template <class _Iter1, class _Iter2> 1273inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1274bool 1275operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1276{ 1277 return __x.base() == __y.base(); 1278} 1279 1280template <class _Iter1, class _Iter2> 1281inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1282bool 1283operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1284{ 1285 return __x.base() < __y.base(); 1286} 1287 1288template <class _Iter1, class _Iter2> 1289inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1290bool 1291operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1292{ 1293 return __x.base() != __y.base(); 1294} 1295 1296template <class _Iter1, class _Iter2> 1297inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1298bool 1299operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1300{ 1301 return __x.base() > __y.base(); 1302} 1303 1304template <class _Iter1, class _Iter2> 1305inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1306bool 1307operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1308{ 1309 return __x.base() >= __y.base(); 1310} 1311 1312template <class _Iter1, class _Iter2> 1313inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1314bool 1315operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1316{ 1317 return __x.base() <= __y.base(); 1318} 1319 1320#ifndef _LIBCPP_CXX03_LANG 1321template <class _Iter1, class _Iter2> 1322inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1323auto 1324operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1325-> decltype(__x.base() - __y.base()) 1326{ 1327 return __x.base() - __y.base(); 1328} 1329#else 1330template <class _Iter1, class _Iter2> 1331inline _LIBCPP_INLINE_VISIBILITY 1332typename move_iterator<_Iter1>::difference_type 1333operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1334{ 1335 return __x.base() - __y.base(); 1336} 1337#endif 1338 1339template <class _Iter> 1340inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1341move_iterator<_Iter> 1342operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1343{ 1344 return move_iterator<_Iter>(__x.base() + __n); 1345} 1346 1347template <class _Iter> 1348inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1349move_iterator<_Iter> 1350make_move_iterator(_Iter __i) 1351{ 1352 return move_iterator<_Iter>(__i); 1353} 1354 1355// __wrap_iter 1356 1357template <class _Iter> class __wrap_iter; 1358 1359template <class _Iter1, class _Iter2> 1360_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1361bool 1362operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1363 1364template <class _Iter1, class _Iter2> 1365_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1366bool 1367operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1368 1369template <class _Iter1, class _Iter2> 1370_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1371bool 1372operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1373 1374template <class _Iter1, class _Iter2> 1375_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1376bool 1377operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1378 1379template <class _Iter1, class _Iter2> 1380_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1381bool 1382operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1383 1384template <class _Iter1, class _Iter2> 1385_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1386bool 1387operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1388 1389#ifndef _LIBCPP_CXX03_LANG 1390template <class _Iter1, class _Iter2> 1391_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1392auto 1393operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1394-> decltype(__x.base() - __y.base()); 1395#else 1396template <class _Iter1, class _Iter2> 1397_LIBCPP_INLINE_VISIBILITY 1398typename __wrap_iter<_Iter1>::difference_type 1399operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1400#endif 1401 1402template <class _Iter> 1403_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1404__wrap_iter<_Iter> 1405operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1406 1407template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1408template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1409template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1410template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1411 1412template <class _Iter> 1413class __wrap_iter 1414{ 1415public: 1416 typedef _Iter iterator_type; 1417 typedef typename iterator_traits<iterator_type>::value_type value_type; 1418 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1419 typedef typename iterator_traits<iterator_type>::pointer pointer; 1420 typedef typename iterator_traits<iterator_type>::reference reference; 1421 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1422#if _LIBCPP_STD_VER > 17 1423 typedef contiguous_iterator_tag iterator_concept; 1424#endif 1425 1426private: 1427 iterator_type __i; 1428public: 1429 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1430#if _LIBCPP_STD_VER > 11 1431 : __i{} 1432#endif 1433 { 1434#if _LIBCPP_DEBUG_LEVEL == 2 1435 __get_db()->__insert_i(this); 1436#endif 1437 } 1438 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1439 __wrap_iter(const __wrap_iter<_Up>& __u, 1440 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1441 : __i(__u.base()) 1442 { 1443#if _LIBCPP_DEBUG_LEVEL == 2 1444 __get_db()->__iterator_copy(this, &__u); 1445#endif 1446 } 1447#if _LIBCPP_DEBUG_LEVEL == 2 1448 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1449 __wrap_iter(const __wrap_iter& __x) 1450 : __i(__x.base()) 1451 { 1452 __get_db()->__iterator_copy(this, &__x); 1453 } 1454 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1455 __wrap_iter& operator=(const __wrap_iter& __x) 1456 { 1457 if (this != &__x) 1458 { 1459 __get_db()->__iterator_copy(this, &__x); 1460 __i = __x.__i; 1461 } 1462 return *this; 1463 } 1464 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1465 ~__wrap_iter() 1466 { 1467 __get_db()->__erase_i(this); 1468 } 1469#endif 1470 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1471 { 1472#if _LIBCPP_DEBUG_LEVEL == 2 1473 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1474 "Attempted to dereference a non-dereferenceable iterator"); 1475#endif 1476 return *__i; 1477 } 1478 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1479 { 1480#if _LIBCPP_DEBUG_LEVEL == 2 1481 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1482 "Attempted to dereference a non-dereferenceable iterator"); 1483#endif 1484 return _VSTD::__to_address(__i); 1485 } 1486 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1487 { 1488#if _LIBCPP_DEBUG_LEVEL == 2 1489 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1490 "Attempted to increment a non-incrementable iterator"); 1491#endif 1492 ++__i; 1493 return *this; 1494 } 1495 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1496 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1497 1498 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1499 { 1500#if _LIBCPP_DEBUG_LEVEL == 2 1501 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1502 "Attempted to decrement a non-decrementable iterator"); 1503#endif 1504 --__i; 1505 return *this; 1506 } 1507 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1508 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1509 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1510 {__wrap_iter __w(*this); __w += __n; return __w;} 1511 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1512 { 1513#if _LIBCPP_DEBUG_LEVEL == 2 1514 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1515 "Attempted to add/subtract an iterator outside its valid range"); 1516#endif 1517 __i += __n; 1518 return *this; 1519 } 1520 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1521 {return *this + (-__n);} 1522 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1523 {*this += -__n; return *this;} 1524 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1525 { 1526#if _LIBCPP_DEBUG_LEVEL == 2 1527 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1528 "Attempted to subscript an iterator outside its valid range"); 1529#endif 1530 return __i[__n]; 1531 } 1532 1533 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1534 1535private: 1536#if _LIBCPP_DEBUG_LEVEL == 2 1537 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1538 { 1539 __get_db()->__insert_ic(this, __p); 1540 } 1541#else 1542 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1543#endif 1544 1545 template <class _Up> friend class __wrap_iter; 1546 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1547 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1548 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1549 1550 template <class _Iter1, class _Iter2> 1551 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1552 bool 1553 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1554 1555 template <class _Iter1, class _Iter2> 1556 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1557 bool 1558 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1559 1560 template <class _Iter1, class _Iter2> 1561 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1562 bool 1563 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1564 1565 template <class _Iter1, class _Iter2> 1566 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1567 bool 1568 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1569 1570 template <class _Iter1, class _Iter2> 1571 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1572 bool 1573 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1574 1575 template <class _Iter1, class _Iter2> 1576 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1577 bool 1578 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1579 1580#ifndef _LIBCPP_CXX03_LANG 1581 template <class _Iter1, class _Iter2> 1582 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1583 auto 1584 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1585 -> decltype(__x.base() - __y.base()); 1586#else 1587 template <class _Iter1, class _Iter2> 1588 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1589 typename __wrap_iter<_Iter1>::difference_type 1590 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1591#endif 1592 1593 template <class _Iter1> 1594 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1595 __wrap_iter<_Iter1> 1596 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1597}; 1598 1599#if _LIBCPP_STD_VER <= 17 1600template <class _It> 1601struct __is_cpp17_contiguous_iterator<__wrap_iter<_It> > : true_type {}; 1602#endif 1603 1604template <class _Iter> 1605_LIBCPP_CONSTEXPR 1606decltype(_VSTD::__to_address(declval<_Iter>())) 1607__to_address(__wrap_iter<_Iter> __w) _NOEXCEPT { 1608 return _VSTD::__to_address(__w.base()); 1609} 1610 1611template <class _Iter1, class _Iter2> 1612inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1613bool 1614operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1615{ 1616 return __x.base() == __y.base(); 1617} 1618 1619template <class _Iter1, class _Iter2> 1620inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1621bool 1622operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1623{ 1624#if _LIBCPP_DEBUG_LEVEL == 2 1625 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1626 "Attempted to compare incomparable iterators"); 1627#endif 1628 return __x.base() < __y.base(); 1629} 1630 1631template <class _Iter1, class _Iter2> 1632inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1633bool 1634operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1635{ 1636 return !(__x == __y); 1637} 1638 1639template <class _Iter1, class _Iter2> 1640inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1641bool 1642operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1643{ 1644 return __y < __x; 1645} 1646 1647template <class _Iter1, class _Iter2> 1648inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1649bool 1650operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1651{ 1652 return !(__x < __y); 1653} 1654 1655template <class _Iter1, class _Iter2> 1656inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1657bool 1658operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1659{ 1660 return !(__y < __x); 1661} 1662 1663template <class _Iter1> 1664inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1665bool 1666operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1667{ 1668 return !(__x == __y); 1669} 1670 1671template <class _Iter1> 1672inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1673bool 1674operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1675{ 1676 return __y < __x; 1677} 1678 1679template <class _Iter1> 1680inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1681bool 1682operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1683{ 1684 return !(__x < __y); 1685} 1686 1687template <class _Iter1> 1688inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1689bool 1690operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1691{ 1692 return !(__y < __x); 1693} 1694 1695#ifndef _LIBCPP_CXX03_LANG 1696template <class _Iter1, class _Iter2> 1697inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1698auto 1699operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1700-> decltype(__x.base() - __y.base()) 1701{ 1702#if _LIBCPP_DEBUG_LEVEL == 2 1703 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1704 "Attempted to subtract incompatible iterators"); 1705#endif 1706 return __x.base() - __y.base(); 1707} 1708#else 1709template <class _Iter1, class _Iter2> 1710inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1711typename __wrap_iter<_Iter1>::difference_type 1712operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1713{ 1714#if _LIBCPP_DEBUG_LEVEL == 2 1715 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1716 "Attempted to subtract incompatible iterators"); 1717#endif 1718 return __x.base() - __y.base(); 1719} 1720#endif 1721 1722template <class _Iter> 1723inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1724__wrap_iter<_Iter> 1725operator+(typename __wrap_iter<_Iter>::difference_type __n, 1726 __wrap_iter<_Iter> __x) _NOEXCEPT 1727{ 1728 __x += __n; 1729 return __x; 1730} 1731 1732template <class _Tp, size_t _Np> 1733_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1734_Tp* 1735begin(_Tp (&__array)[_Np]) 1736{ 1737 return __array; 1738} 1739 1740template <class _Tp, size_t _Np> 1741_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1742_Tp* 1743end(_Tp (&__array)[_Np]) 1744{ 1745 return __array + _Np; 1746} 1747 1748#if !defined(_LIBCPP_CXX03_LANG) 1749 1750template <class _Cp> 1751_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1752auto 1753begin(_Cp& __c) -> decltype(__c.begin()) 1754{ 1755 return __c.begin(); 1756} 1757 1758template <class _Cp> 1759_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1760auto 1761begin(const _Cp& __c) -> decltype(__c.begin()) 1762{ 1763 return __c.begin(); 1764} 1765 1766template <class _Cp> 1767_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1768auto 1769end(_Cp& __c) -> decltype(__c.end()) 1770{ 1771 return __c.end(); 1772} 1773 1774template <class _Cp> 1775_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1776auto 1777end(const _Cp& __c) -> decltype(__c.end()) 1778{ 1779 return __c.end(); 1780} 1781 1782#if _LIBCPP_STD_VER > 11 1783 1784template <class _Tp, size_t _Np> 1785_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1786reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1787{ 1788 return reverse_iterator<_Tp*>(__array + _Np); 1789} 1790 1791template <class _Tp, size_t _Np> 1792_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1793reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1794{ 1795 return reverse_iterator<_Tp*>(__array); 1796} 1797 1798template <class _Ep> 1799_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1800reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1801{ 1802 return reverse_iterator<const _Ep*>(__il.end()); 1803} 1804 1805template <class _Ep> 1806_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1807reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1808{ 1809 return reverse_iterator<const _Ep*>(__il.begin()); 1810} 1811 1812template <class _Cp> 1813_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1814auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1815{ 1816 return _VSTD::begin(__c); 1817} 1818 1819template <class _Cp> 1820_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1821auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1822{ 1823 return _VSTD::end(__c); 1824} 1825 1826template <class _Cp> 1827_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1828auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1829{ 1830 return __c.rbegin(); 1831} 1832 1833template <class _Cp> 1834_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1835auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1836{ 1837 return __c.rbegin(); 1838} 1839 1840template <class _Cp> 1841_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1842auto rend(_Cp& __c) -> decltype(__c.rend()) 1843{ 1844 return __c.rend(); 1845} 1846 1847template <class _Cp> 1848_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1849auto rend(const _Cp& __c) -> decltype(__c.rend()) 1850{ 1851 return __c.rend(); 1852} 1853 1854template <class _Cp> 1855_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1856auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1857{ 1858 return _VSTD::rbegin(__c); 1859} 1860 1861template <class _Cp> 1862_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1863auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1864{ 1865 return _VSTD::rend(__c); 1866} 1867 1868#endif 1869 1870 1871#else // defined(_LIBCPP_CXX03_LANG) 1872 1873template <class _Cp> 1874_LIBCPP_INLINE_VISIBILITY 1875typename _Cp::iterator 1876begin(_Cp& __c) 1877{ 1878 return __c.begin(); 1879} 1880 1881template <class _Cp> 1882_LIBCPP_INLINE_VISIBILITY 1883typename _Cp::const_iterator 1884begin(const _Cp& __c) 1885{ 1886 return __c.begin(); 1887} 1888 1889template <class _Cp> 1890_LIBCPP_INLINE_VISIBILITY 1891typename _Cp::iterator 1892end(_Cp& __c) 1893{ 1894 return __c.end(); 1895} 1896 1897template <class _Cp> 1898_LIBCPP_INLINE_VISIBILITY 1899typename _Cp::const_iterator 1900end(const _Cp& __c) 1901{ 1902 return __c.end(); 1903} 1904 1905#endif // !defined(_LIBCPP_CXX03_LANG) 1906 1907#if _LIBCPP_STD_VER > 14 1908 1909// #if _LIBCPP_STD_VER > 11 1910// template <> 1911// struct _LIBCPP_TEMPLATE_VIS plus<void> 1912// { 1913// template <class _T1, class _T2> 1914// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1915// auto operator()(_T1&& __t, _T2&& __u) const 1916// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1917// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1918// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1919// typedef void is_transparent; 1920// }; 1921// #endif 1922 1923template <class _Cont> 1924_LIBCPP_INLINE_VISIBILITY 1925constexpr auto size(const _Cont& __c) 1926_NOEXCEPT_(noexcept(__c.size())) 1927-> decltype (__c.size()) 1928{ return __c.size(); } 1929 1930template <class _Tp, size_t _Sz> 1931_LIBCPP_INLINE_VISIBILITY 1932constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1933 1934#if _LIBCPP_STD_VER > 17 1935template <class _Cont> 1936_LIBCPP_INLINE_VISIBILITY 1937constexpr auto ssize(const _Cont& __c) 1938_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1939-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1940{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1941 1942template <class _Tp, ptrdiff_t _Sz> 1943_LIBCPP_INLINE_VISIBILITY 1944constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1945#endif 1946 1947template <class _Cont> 1948_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1949constexpr auto empty(const _Cont& __c) 1950_NOEXCEPT_(noexcept(__c.empty())) 1951-> decltype (__c.empty()) 1952{ return __c.empty(); } 1953 1954template <class _Tp, size_t _Sz> 1955_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1956constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1957 1958template <class _Ep> 1959_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1960constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1961 1962template <class _Cont> constexpr 1963_LIBCPP_INLINE_VISIBILITY 1964auto data(_Cont& __c) 1965_NOEXCEPT_(noexcept(__c.data())) 1966-> decltype (__c.data()) 1967{ return __c.data(); } 1968 1969template <class _Cont> constexpr 1970_LIBCPP_INLINE_VISIBILITY 1971auto data(const _Cont& __c) 1972_NOEXCEPT_(noexcept(__c.data())) 1973-> decltype (__c.data()) 1974{ return __c.data(); } 1975 1976template <class _Tp, size_t _Sz> 1977_LIBCPP_INLINE_VISIBILITY 1978constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1979 1980template <class _Ep> 1981_LIBCPP_INLINE_VISIBILITY 1982constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1983#endif 1984 1985template <class _Container, class _Predicate> 1986typename _Container::size_type 1987__libcpp_erase_if_container(_Container& __c, _Predicate& __pred) { 1988 typename _Container::size_type __old_size = __c.size(); 1989 1990 const typename _Container::iterator __last = __c.end(); 1991 for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) { 1992 if (__pred(*__iter)) 1993 __iter = __c.erase(__iter); 1994 else 1995 ++__iter; 1996 } 1997 1998 return __old_size - __c.size(); 1999} 2000 2001_LIBCPP_END_NAMESPACE_STD 2002 2003#endif // _LIBCPP_ITERATOR 2004