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++20 127 128// [alg.req.ind.move], concept indirectly_movable 129template<class In, class Out> 130 concept indirectly_movable = see below; // since C++20 131 132template<class In, class Out> 133 concept indirectly_movable_storable = see below; // since C++20 134 135template<class Category, class T, class Distance = ptrdiff_t, 136 class Pointer = T*, class Reference = T&> 137struct iterator // deprecated in C++17 138{ 139 typedef T value_type; 140 typedef Distance difference_type; 141 typedef Pointer pointer; 142 typedef Reference reference; 143 typedef Category iterator_category; 144}; 145 146struct input_iterator_tag {}; 147struct output_iterator_tag {}; 148struct forward_iterator_tag : public input_iterator_tag {}; 149struct bidirectional_iterator_tag : public forward_iterator_tag {}; 150struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 151 152// 27.4.3, iterator operations 153template <class InputIterator, class Distance> // constexpr in C++17 154 constexpr void advance(InputIterator& i, Distance n); 155 156template <class InputIterator> // constexpr in C++17 157 constexpr typename iterator_traits<InputIterator>::difference_type 158 distance(InputIterator first, InputIterator last); 159 160template <class InputIterator> // constexpr in C++17 161 constexpr InputIterator next(InputIterator x, 162typename iterator_traits<InputIterator>::difference_type n = 1); 163 164template <class BidirectionalIterator> // constexpr in C++17 165 constexpr BidirectionalIterator prev(BidirectionalIterator x, 166 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 167 168// [range.iter.ops], range iterator operations 169namespace ranges { 170 // [range.iter.op.advance], ranges::advance 171 template<input_or_output_iterator I> 172 constexpr void advance(I& i, iter_difference_t<I> n); // since C++20 173 template<input_or_output_iterator I, sentinel_for<I> S> 174 constexpr void advance(I& i, S bound); // since C++20 175 template<input_or_output_iterator I, sentinel_for<I> S> 176 constexpr iter_difference_t<I> advance(I& i, iter_difference_t<I> n, S bound); // since C++20 177} 178 179template <class Iterator> 180class reverse_iterator 181 : public iterator<typename iterator_traits<Iterator>::iterator_category, // until C++17 182 typename iterator_traits<Iterator>::value_type, 183 typename iterator_traits<Iterator>::difference_type, 184 typename iterator_traits<Iterator>::pointer, 185 typename iterator_traits<Iterator>::reference> 186{ 187protected: 188 Iterator current; 189public: 190 typedef Iterator iterator_type; 191 typedef typename iterator_traits<Iterator>::difference_type difference_type; 192 typedef typename iterator_traits<Iterator>::reference reference; 193 typedef typename iterator_traits<Iterator>::pointer pointer; 194 195 constexpr reverse_iterator(); 196 constexpr explicit reverse_iterator(Iterator x); 197 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 198 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 199 constexpr Iterator base() const; 200 constexpr reference operator*() const; 201 constexpr pointer operator->() const; 202 constexpr reverse_iterator& operator++(); 203 constexpr reverse_iterator operator++(int); 204 constexpr reverse_iterator& operator--(); 205 constexpr reverse_iterator operator--(int); 206 constexpr reverse_iterator operator+ (difference_type n) const; 207 constexpr reverse_iterator& operator+=(difference_type n); 208 constexpr reverse_iterator operator- (difference_type n) const; 209 constexpr reverse_iterator& operator-=(difference_type n); 210 constexpr reference operator[](difference_type n) const; 211}; 212 213template <class Iterator1, class Iterator2> 214constexpr bool // constexpr in C++17 215operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 216 217template <class Iterator1, class Iterator2> 218constexpr bool // constexpr in C++17 219operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 220 221template <class Iterator1, class Iterator2> 222constexpr bool // constexpr in C++17 223operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 224 225template <class Iterator1, class Iterator2> 226constexpr bool // constexpr in C++17 227operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 228 229template <class Iterator1, class Iterator2> 230constexpr bool // constexpr in C++17 231operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 232 233template <class Iterator1, class Iterator2> 234constexpr bool // constexpr in C++17 235operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 236 237template <class Iterator1, class Iterator2> 238constexpr auto 239operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 240-> decltype(__y.base() - __x.base()); // constexpr in C++17 241 242template <class Iterator> 243constexpr reverse_iterator<Iterator> 244operator+(typename reverse_iterator<Iterator>::difference_type n, 245 const reverse_iterator<Iterator>& x); // constexpr in C++17 246 247template <class Iterator> 248constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 249 250template <class Container> 251class back_insert_iterator 252 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 253{ 254protected: 255 Container* container; 256public: 257 typedef Container container_type; 258 typedef void value_type; 259 typedef void difference_type; // until C++20 260 typedef ptrdiff_t difference_type; // since C++20 261 typedef void reference; 262 typedef void pointer; 263 264 explicit back_insert_iterator(Container& x); // constexpr in C++20 265 back_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 266 back_insert_iterator& operator*(); // constexpr in C++20 267 back_insert_iterator& operator++(); // constexpr in C++20 268 back_insert_iterator operator++(int); // constexpr in C++20 269}; 270 271template <class Container> back_insert_iterator<Container> back_inserter(Container& x); // constexpr in C++20 272 273template <class Container> 274class front_insert_iterator 275 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 276{ 277protected: 278 Container* container; 279public: 280 typedef Container container_type; 281 typedef void value_type; 282 typedef void difference_type; // until C++20 283 typedef ptrdiff_t difference_type; // since C++20 284 typedef void reference; 285 typedef void pointer; 286 287 explicit front_insert_iterator(Container& x); // constexpr in C++20 288 front_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 289 front_insert_iterator& operator*(); // constexpr in C++20 290 front_insert_iterator& operator++(); // constexpr in C++20 291 front_insert_iterator operator++(int); // constexpr in C++20 292}; 293 294template <class Container> front_insert_iterator<Container> front_inserter(Container& x); // constexpr in C++20 295 296template <class Container> 297class insert_iterator 298 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 299{ 300protected: 301 Container* container; 302 typename Container::iterator iter; 303public: 304 typedef Container container_type; 305 typedef void value_type; 306 typedef void difference_type; // until C++20 307 typedef ptrdiff_t difference_type; // since C++20 308 typedef void reference; 309 typedef void pointer; 310 311 insert_iterator(Container& x, typename Container::iterator i); // constexpr in C++20 312 insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 313 insert_iterator& operator*(); // constexpr in C++20 314 insert_iterator& operator++(); // constexpr in C++20 315 insert_iterator& operator++(int); // constexpr in C++20 316}; 317 318template <class Container, class Iterator> 319insert_iterator<Container> inserter(Container& x, Iterator i); // constexpr in C++20 320 321template <class Iterator> 322class move_iterator { 323public: 324 typedef Iterator iterator_type; 325 typedef typename iterator_traits<Iterator>::difference_type difference_type; 326 typedef Iterator pointer; 327 typedef typename iterator_traits<Iterator>::value_type value_type; 328 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 329 typedef value_type&& reference; 330 331 constexpr move_iterator(); // all the constexprs are in C++17 332 constexpr explicit move_iterator(Iterator i); 333 template <class U> 334 constexpr move_iterator(const move_iterator<U>& u); 335 template <class U> 336 constexpr move_iterator& operator=(const move_iterator<U>& u); 337 constexpr iterator_type base() const; 338 constexpr reference operator*() const; 339 constexpr pointer operator->() const; 340 constexpr move_iterator& operator++(); 341 constexpr move_iterator operator++(int); 342 constexpr move_iterator& operator--(); 343 constexpr move_iterator operator--(int); 344 constexpr move_iterator operator+(difference_type n) const; 345 constexpr move_iterator& operator+=(difference_type n); 346 constexpr move_iterator operator-(difference_type n) const; 347 constexpr move_iterator& operator-=(difference_type n); 348 constexpr unspecified operator[](difference_type n) const; 349private: 350 Iterator current; // exposition only 351}; 352 353template <class Iterator1, class Iterator2> 354constexpr bool // constexpr in C++17 355operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 356 357template <class Iterator1, class Iterator2> 358constexpr bool // constexpr in C++17 359operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 360 361template <class Iterator1, class Iterator2> 362constexpr bool // constexpr in C++17 363operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 364 365template <class Iterator1, class Iterator2> 366constexpr bool // constexpr in C++17 367operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 368 369template <class Iterator1, class Iterator2> 370constexpr bool // constexpr in C++17 371operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 372 373template <class Iterator1, class Iterator2> 374constexpr bool // constexpr in C++17 375operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 376 377template <class Iterator1, class Iterator2> 378constexpr auto // constexpr in C++17 379operator-(const move_iterator<Iterator1>& x, 380 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 381 382template <class Iterator> 383constexpr move_iterator<Iterator> operator+( // constexpr in C++17 384 typename move_iterator<Iterator>::difference_type n, 385 const move_iterator<Iterator>& x); 386 387template <class Iterator> // constexpr in C++17 388constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 389 390// [default.sentinel], default sentinel 391struct default_sentinel_t; 392inline constexpr default_sentinel_t default_sentinel{}; 393 394template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 395class istream_iterator 396 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> // until C++17 397{ 398public: 399 typedef input_iterator_tag iterator_category; 400 typedef T value_type; 401 typedef Distance difference_type; 402 typedef const T* pointer; 403 typedef const T& reference; 404 405 typedef charT char_type; 406 typedef traits traits_type; 407 typedef basic_istream<charT, traits> istream_type; 408 409 constexpr istream_iterator(); 410 istream_iterator(istream_type& s); 411 istream_iterator(const istream_iterator& x); 412 ~istream_iterator(); 413 414 const T& operator*() const; 415 const T* operator->() const; 416 istream_iterator& operator++(); 417 istream_iterator operator++(int); 418}; 419 420template <class T, class charT, class traits, class Distance> 421bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 422 const istream_iterator<T,charT,traits,Distance>& y); 423template <class T, class charT, class traits, class Distance> 424bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 425 const istream_iterator<T,charT,traits,Distance>& y); 426 427template <class T, class charT = char, class traits = char_traits<charT> > 428class ostream_iterator 429 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 430{ 431public: 432 typedef output_iterator_tag iterator_category; 433 typedef void value_type; 434 typedef void difference_type; // until C++20 435 typedef ptrdiff_t difference_type; // since C++20 436 typedef void pointer; 437 typedef void reference; 438 439 typedef charT char_type; 440 typedef traits traits_type; 441 typedef basic_ostream<charT,traits> ostream_type; 442 443 ostream_iterator(ostream_type& s); 444 ostream_iterator(ostream_type& s, const charT* delimiter); 445 ostream_iterator(const ostream_iterator& x); 446 ~ostream_iterator(); 447 ostream_iterator& operator=(const T& value); 448 449 ostream_iterator& operator*(); 450 ostream_iterator& operator++(); 451 ostream_iterator& operator++(int); 452}; 453 454template<class charT, class traits = char_traits<charT> > 455class istreambuf_iterator 456 : public iterator<input_iterator_tag, charT, traits::off_type, unspecified, charT> // until C++17 457{ 458public: 459 typedef input_iterator_tag iterator_category; 460 typedef charT value_type; 461 typedef traits::off_type difference_type; 462 typedef unspecified pointer; 463 typedef charT reference; 464 465 typedef charT char_type; 466 typedef traits traits_type; 467 typedef traits::int_type int_type; 468 typedef basic_streambuf<charT, traits> streambuf_type; 469 typedef basic_istream<charT, traits> istream_type; 470 471 istreambuf_iterator() noexcept; 472 istreambuf_iterator(istream_type& s) noexcept; 473 istreambuf_iterator(streambuf_type* s) noexcept; 474 istreambuf_iterator(a-private-type) noexcept; 475 476 charT operator*() const; 477 pointer operator->() const; 478 istreambuf_iterator& operator++(); 479 a-private-type operator++(int); 480 481 bool equal(const istreambuf_iterator& b) const; 482}; 483 484template <class charT, class traits> 485bool operator==(const istreambuf_iterator<charT,traits>& a, 486 const istreambuf_iterator<charT,traits>& b); 487template <class charT, class traits> 488bool operator!=(const istreambuf_iterator<charT,traits>& a, 489 const istreambuf_iterator<charT,traits>& b); 490 491template <class charT, class traits = char_traits<charT> > 492class ostreambuf_iterator 493 : public iterator<output_iterator_tag, void, void, void, void> // until C++17 494{ 495public: 496 typedef output_iterator_tag iterator_category; 497 typedef void value_type; 498 typedef void difference_type; // until C++20 499 typedef ptrdiff_t difference_type; // since C++20 500 typedef void pointer; 501 typedef void reference; 502 503 typedef charT char_type; 504 typedef traits traits_type; 505 typedef basic_streambuf<charT, traits> streambuf_type; 506 typedef basic_ostream<charT, traits> ostream_type; 507 508 ostreambuf_iterator(ostream_type& s) noexcept; 509 ostreambuf_iterator(streambuf_type* s) noexcept; 510 ostreambuf_iterator& operator=(charT c); 511 ostreambuf_iterator& operator*(); 512 ostreambuf_iterator& operator++(); 513 ostreambuf_iterator& operator++(int); 514 bool failed() const noexcept; 515}; 516 517template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 518template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 519template <class C> constexpr auto end(C& c) -> decltype(c.end()); 520template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 521template <class T, size_t N> constexpr T* begin(T (&array)[N]); 522template <class T, size_t N> constexpr T* end(T (&array)[N]); 523 524template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 525template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 526template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 527template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 528template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 529template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 530template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 531template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 532template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 533template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 534template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 535template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 536 537// 24.8, container access: 538template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 539template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 540 541template <class C> constexpr auto ssize(const C& c) 542 -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 543template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 544 545template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 546template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 547template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 548template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 549template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 550template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 551template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 552 553} // std 554 555*/ 556 557#include <__config> 558#include <__debug> 559#include <__functional_base> 560#include <__iterator/advance.h> 561#include <__iterator/concepts.h> 562#include <__iterator/default_sentinel.h> 563#include <__iterator/incrementable_traits.h> 564#include <__iterator/iter_move.h> 565#include <__iterator/iter_swap.h> 566#include <__iterator/iterator_traits.h> 567#include <__iterator/next.h> 568#include <__iterator/prev.h> 569#include <__iterator/projected.h> 570#include <__iterator/readable_traits.h> 571#include <__memory/addressof.h> 572#include <__memory/pointer_traits.h> 573#include <__utility/forward.h> 574#include <compare> 575#include <concepts> // Mandated by the Standard. 576#include <cstddef> 577#include <initializer_list> 578#include <iosfwd> // for forward declarations of vector and string 579#include <type_traits> 580#include <version> 581 582#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 583#pragma GCC system_header 584#endif 585 586_LIBCPP_BEGIN_NAMESPACE_STD 587 588template<class _Category, class _Tp, class _Distance = ptrdiff_t, 589 class _Pointer = _Tp*, class _Reference = _Tp&> 590struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 iterator 591{ 592 typedef _Tp value_type; 593 typedef _Distance difference_type; 594 typedef _Pointer pointer; 595 typedef _Reference reference; 596 typedef _Category iterator_category; 597}; 598 599template <class _InputIter> 600inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 601typename iterator_traits<_InputIter>::difference_type 602__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 603{ 604 typename iterator_traits<_InputIter>::difference_type __r(0); 605 for (; __first != __last; ++__first) 606 ++__r; 607 return __r; 608} 609 610template <class _RandIter> 611inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 612typename iterator_traits<_RandIter>::difference_type 613__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 614{ 615 return __last - __first; 616} 617 618template <class _InputIter> 619inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 620typename iterator_traits<_InputIter>::difference_type 621distance(_InputIter __first, _InputIter __last) 622{ 623 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 624} 625 626template <class _Tp, class = void> 627struct __is_stashing_iterator : false_type {}; 628 629template <class _Tp> 630struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 631 : true_type {}; 632 633_LIBCPP_SUPPRESS_DEPRECATED_PUSH 634template <class _Iter> 635class _LIBCPP_TEMPLATE_VIS reverse_iterator 636#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 637 : public iterator<typename iterator_traits<_Iter>::iterator_category, 638 typename iterator_traits<_Iter>::value_type, 639 typename iterator_traits<_Iter>::difference_type, 640 typename iterator_traits<_Iter>::pointer, 641 typename iterator_traits<_Iter>::reference> 642#endif 643{ 644_LIBCPP_SUPPRESS_DEPRECATED_POP 645private: 646#ifndef _LIBCPP_ABI_NO_ITERATOR_BASES 647 _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 648#endif 649 650 static_assert(!__is_stashing_iterator<_Iter>::value, 651 "The specified iterator type cannot be used with reverse_iterator; " 652 "Using stashing iterators with reverse_iterator causes undefined behavior"); 653 654protected: 655 _Iter current; 656public: 657 typedef _Iter iterator_type; 658 typedef typename iterator_traits<_Iter>::difference_type difference_type; 659 typedef typename iterator_traits<_Iter>::reference reference; 660 typedef typename iterator_traits<_Iter>::pointer pointer; 661 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 662 random_access_iterator_tag, 663 typename iterator_traits<_Iter>::iterator_category> iterator_category; 664 typedef typename iterator_traits<_Iter>::value_type value_type; 665 666#if _LIBCPP_STD_VER > 17 667 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 668 random_access_iterator_tag, 669 bidirectional_iterator_tag> iterator_concept; 670#endif 671 672#ifndef _LIBCPP_ABI_NO_ITERATOR_BASES 673 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 674 reverse_iterator() : __t(), current() {} 675 676 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 677 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 678 679 template <class _Up, class = _EnableIf< 680 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 681 > > 682 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 683 reverse_iterator(const reverse_iterator<_Up>& __u) 684 : __t(__u.base()), current(__u.base()) 685 { } 686 687 template <class _Up, class = _EnableIf< 688 !is_same<_Up, _Iter>::value && 689 is_convertible<_Up const&, _Iter>::value && 690 is_assignable<_Up const&, _Iter>::value 691 > > 692 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 693 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) { 694 __t = current = __u.base(); 695 return *this; 696 } 697#else 698 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 699 reverse_iterator() : current() {} 700 701 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 702 explicit reverse_iterator(_Iter __x) : current(__x) {} 703 704 template <class _Up, class = _EnableIf< 705 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 706 > > 707 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 708 reverse_iterator(const reverse_iterator<_Up>& __u) 709 : current(__u.base()) 710 { } 711 712 template <class _Up, class = _EnableIf< 713 !is_same<_Up, _Iter>::value && 714 is_convertible<_Up const&, _Iter>::value && 715 is_assignable<_Up const&, _Iter>::value 716 > > 717 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 718 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) { 719 current = __u.base(); 720 return *this; 721 } 722#endif 723 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 724 _Iter base() const {return current;} 725 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 726 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 727 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 728 pointer operator->() const {return _VSTD::addressof(operator*());} 729 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 730 reverse_iterator& operator++() {--current; return *this;} 731 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 732 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 733 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 734 reverse_iterator& operator--() {++current; return *this;} 735 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 736 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 737 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 738 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 739 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 740 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 741 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 742 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 743 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 744 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 745 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 746 reference operator[](difference_type __n) const {return *(*this + __n);} 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 789template <class _Iter1, class _Iter2> 790inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 791bool 792operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 793{ 794 return __x.base() >= __y.base(); 795} 796 797#ifndef _LIBCPP_CXX03_LANG 798template <class _Iter1, class _Iter2> 799inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 800auto 801operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 802-> decltype(__y.base() - __x.base()) 803{ 804 return __y.base() - __x.base(); 805} 806#else 807template <class _Iter1, class _Iter2> 808inline _LIBCPP_INLINE_VISIBILITY 809typename reverse_iterator<_Iter1>::difference_type 810operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 811{ 812 return __y.base() - __x.base(); 813} 814#endif 815 816template <class _Iter> 817inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 818reverse_iterator<_Iter> 819operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 820{ 821 return reverse_iterator<_Iter>(__x.base() - __n); 822} 823 824#if _LIBCPP_STD_VER > 11 825template <class _Iter> 826inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 827reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 828{ 829 return reverse_iterator<_Iter>(__i); 830} 831#endif 832 833_LIBCPP_SUPPRESS_DEPRECATED_PUSH 834template <class _Container> 835class _LIBCPP_TEMPLATE_VIS back_insert_iterator 836#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 837 : public iterator<output_iterator_tag, void, void, void, void> 838#endif 839{ 840_LIBCPP_SUPPRESS_DEPRECATED_POP 841protected: 842 _Container* container; 843public: 844 typedef output_iterator_tag iterator_category; 845 typedef void value_type; 846#if _LIBCPP_STD_VER > 17 847 typedef ptrdiff_t difference_type; 848#else 849 typedef void difference_type; 850#endif 851 typedef void pointer; 852 typedef void reference; 853 typedef _Container container_type; 854 855 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 856 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_) 857 {container->push_back(__value_); return *this;} 858#ifndef _LIBCPP_CXX03_LANG 859 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_) 860 {container->push_back(_VSTD::move(__value_)); return *this;} 861#endif // _LIBCPP_CXX03_LANG 862 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator*() {return *this;} 863 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator++() {return *this;} 864 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator operator++(int) {return *this;} 865}; 866 867template <class _Container> 868inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 869back_insert_iterator<_Container> 870back_inserter(_Container& __x) 871{ 872 return back_insert_iterator<_Container>(__x); 873} 874 875_LIBCPP_SUPPRESS_DEPRECATED_PUSH 876template <class _Container> 877class _LIBCPP_TEMPLATE_VIS front_insert_iterator 878#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 879 : public iterator<output_iterator_tag, void, void, void, void> 880#endif 881{ 882_LIBCPP_SUPPRESS_DEPRECATED_POP 883protected: 884 _Container* container; 885public: 886 typedef output_iterator_tag iterator_category; 887 typedef void value_type; 888#if _LIBCPP_STD_VER > 17 889 typedef ptrdiff_t difference_type; 890#else 891 typedef void difference_type; 892#endif 893 typedef void pointer; 894 typedef void reference; 895 typedef _Container container_type; 896 897 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 898 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) 899 {container->push_front(__value_); return *this;} 900#ifndef _LIBCPP_CXX03_LANG 901 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) 902 {container->push_front(_VSTD::move(__value_)); return *this;} 903#endif // _LIBCPP_CXX03_LANG 904 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator*() {return *this;} 905 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator++() {return *this;} 906 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator operator++(int) {return *this;} 907}; 908 909template <class _Container> 910inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 911front_insert_iterator<_Container> 912front_inserter(_Container& __x) 913{ 914 return front_insert_iterator<_Container>(__x); 915} 916 917_LIBCPP_SUPPRESS_DEPRECATED_PUSH 918template <class _Container> 919class _LIBCPP_TEMPLATE_VIS insert_iterator 920#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 921 : public iterator<output_iterator_tag, void, void, void, void> 922#endif 923{ 924_LIBCPP_SUPPRESS_DEPRECATED_POP 925protected: 926 _Container* container; 927 typename _Container::iterator iter; // FIXME: `ranges::iterator_t<Container>` in C++20 mode 928public: 929 typedef output_iterator_tag iterator_category; 930 typedef void value_type; 931#if _LIBCPP_STD_VER > 17 932 typedef ptrdiff_t difference_type; 933#else 934 typedef void difference_type; 935#endif 936 typedef void pointer; 937 typedef void reference; 938 typedef _Container container_type; 939 940 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, typename _Container::iterator __i) 941 : container(_VSTD::addressof(__x)), iter(__i) {} 942 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(const typename _Container::value_type& __value_) 943 {iter = container->insert(iter, __value_); ++iter; return *this;} 944#ifndef _LIBCPP_CXX03_LANG 945 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(typename _Container::value_type&& __value_) 946 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 947#endif // _LIBCPP_CXX03_LANG 948 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator*() {return *this;} 949 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++() {return *this;} 950 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int) {return *this;} 951}; 952 953template <class _Container> 954inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 955insert_iterator<_Container> 956inserter(_Container& __x, typename _Container::iterator __i) 957{ 958 return insert_iterator<_Container>(__x, __i); 959} 960 961_LIBCPP_SUPPRESS_DEPRECATED_PUSH 962template <class _Tp, class _CharT = char, 963 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 964class _LIBCPP_TEMPLATE_VIS istream_iterator 965#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 966 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 967#endif 968{ 969_LIBCPP_SUPPRESS_DEPRECATED_POP 970public: 971 typedef input_iterator_tag iterator_category; 972 typedef _Tp value_type; 973 typedef _Distance difference_type; 974 typedef const _Tp* pointer; 975 typedef const _Tp& reference; 976 typedef _CharT char_type; 977 typedef _Traits traits_type; 978 typedef basic_istream<_CharT,_Traits> istream_type; 979private: 980 istream_type* __in_stream_; 981 _Tp __value_; 982public: 983 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 984 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 985 { 986 if (!(*__in_stream_ >> __value_)) 987 __in_stream_ = nullptr; 988 } 989 990 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 991 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 992 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 993 { 994 if (!(*__in_stream_ >> __value_)) 995 __in_stream_ = nullptr; 996 return *this; 997 } 998 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 999 {istream_iterator __t(*this); ++(*this); return __t;} 1000 1001 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1002 friend _LIBCPP_INLINE_VISIBILITY 1003 bool 1004 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1005 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1006 1007 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1008 friend _LIBCPP_INLINE_VISIBILITY 1009 bool 1010 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1011 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 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.__in_stream_ == __y.__in_stream_; 1021} 1022 1023template <class _Tp, class _CharT, class _Traits, class _Distance> 1024inline _LIBCPP_INLINE_VISIBILITY 1025bool 1026operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1027 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1028{ 1029 return !(__x == __y); 1030} 1031 1032_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1033template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 1034class _LIBCPP_TEMPLATE_VIS ostream_iterator 1035#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1036 : public iterator<output_iterator_tag, void, void, void, void> 1037#endif 1038{ 1039_LIBCPP_SUPPRESS_DEPRECATED_POP 1040public: 1041 typedef output_iterator_tag iterator_category; 1042 typedef void value_type; 1043#if _LIBCPP_STD_VER > 17 1044 typedef ptrdiff_t difference_type; 1045#else 1046 typedef void difference_type; 1047#endif 1048 typedef void pointer; 1049 typedef void reference; 1050 typedef _CharT char_type; 1051 typedef _Traits traits_type; 1052 typedef basic_ostream<_CharT, _Traits> ostream_type; 1053 1054private: 1055 ostream_type* __out_stream_; 1056 const char_type* __delim_; 1057public: 1058 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 1059 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 1060 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 1061 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 1062 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1063 { 1064 *__out_stream_ << __value_; 1065 if (__delim_) 1066 *__out_stream_ << __delim_; 1067 return *this; 1068 } 1069 1070 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1071 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1072 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1073}; 1074 1075_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1076template<class _CharT, class _Traits> 1077class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1078#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1079 : public iterator<input_iterator_tag, _CharT, 1080 typename _Traits::off_type, _CharT*, 1081 _CharT> 1082#endif 1083{ 1084_LIBCPP_SUPPRESS_DEPRECATED_POP 1085public: 1086 typedef input_iterator_tag iterator_category; 1087 typedef _CharT value_type; 1088 typedef typename _Traits::off_type difference_type; 1089 typedef _CharT* pointer; 1090 typedef _CharT reference; 1091 typedef _CharT char_type; 1092 typedef _Traits traits_type; 1093 typedef typename _Traits::int_type int_type; 1094 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1095 typedef basic_istream<_CharT,_Traits> istream_type; 1096private: 1097 mutable streambuf_type* __sbuf_; 1098 1099 class __proxy 1100 { 1101 char_type __keep_; 1102 streambuf_type* __sbuf_; 1103 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1104 : __keep_(__c), __sbuf_(__s) {} 1105 friend class istreambuf_iterator; 1106 public: 1107 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1108 }; 1109 1110 _LIBCPP_INLINE_VISIBILITY 1111 bool __test_for_eof() const 1112 { 1113 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1114 __sbuf_ = nullptr; 1115 return __sbuf_ == nullptr; 1116 } 1117public: 1118 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 1119 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1120 : __sbuf_(__s.rdbuf()) {} 1121 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1122 : __sbuf_(__s) {} 1123 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1124 : __sbuf_(__p.__sbuf_) {} 1125 1126 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1127 {return static_cast<char_type>(__sbuf_->sgetc());} 1128 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1129 { 1130 __sbuf_->sbumpc(); 1131 return *this; 1132 } 1133 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1134 { 1135 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1136 } 1137 1138 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1139 {return __test_for_eof() == __b.__test_for_eof();} 1140}; 1141 1142template <class _CharT, class _Traits> 1143inline _LIBCPP_INLINE_VISIBILITY 1144bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1145 const istreambuf_iterator<_CharT,_Traits>& __b) 1146 {return __a.equal(__b);} 1147 1148template <class _CharT, class _Traits> 1149inline _LIBCPP_INLINE_VISIBILITY 1150bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1151 const istreambuf_iterator<_CharT,_Traits>& __b) 1152 {return !__a.equal(__b);} 1153 1154_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1155template <class _CharT, class _Traits> 1156class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1157#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1158 : public iterator<output_iterator_tag, void, void, void, void> 1159#endif 1160{ 1161_LIBCPP_SUPPRESS_DEPRECATED_POP 1162public: 1163 typedef output_iterator_tag iterator_category; 1164 typedef void value_type; 1165#if _LIBCPP_STD_VER > 17 1166 typedef ptrdiff_t difference_type; 1167#else 1168 typedef void difference_type; 1169#endif 1170 typedef void pointer; 1171 typedef void reference; 1172 typedef _CharT char_type; 1173 typedef _Traits traits_type; 1174 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1175 typedef basic_ostream<_CharT, _Traits> ostream_type; 1176 1177private: 1178 streambuf_type* __sbuf_; 1179public: 1180 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1181 : __sbuf_(__s.rdbuf()) {} 1182 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1183 : __sbuf_(__s) {} 1184 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1185 { 1186 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1187 __sbuf_ = nullptr; 1188 return *this; 1189 } 1190 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1191 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1192 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1193 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1194 1195 template <class _Ch, class _Tr> 1196 friend 1197 _LIBCPP_HIDDEN 1198 ostreambuf_iterator<_Ch, _Tr> 1199 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1200 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1201 ios_base& __iob, _Ch __fl); 1202}; 1203 1204template <class _Iter> 1205class _LIBCPP_TEMPLATE_VIS move_iterator 1206{ 1207private: 1208 _Iter __i; 1209public: 1210 typedef _Iter iterator_type; 1211 typedef typename iterator_traits<iterator_type>::value_type value_type; 1212 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1213 typedef iterator_type pointer; 1214 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 1215 random_access_iterator_tag, 1216 typename iterator_traits<_Iter>::iterator_category> iterator_category; 1217#if _LIBCPP_STD_VER > 17 1218 typedef input_iterator_tag iterator_concept; 1219#endif 1220 1221#ifndef _LIBCPP_CXX03_LANG 1222 typedef typename iterator_traits<iterator_type>::reference __reference; 1223 typedef typename conditional< 1224 is_reference<__reference>::value, 1225 typename remove_reference<__reference>::type&&, 1226 __reference 1227 >::type reference; 1228#else 1229 typedef typename iterator_traits<iterator_type>::reference reference; 1230#endif 1231 1232 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1233 move_iterator() : __i() {} 1234 1235 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1236 explicit move_iterator(_Iter __x) : __i(__x) {} 1237 1238 template <class _Up, class = _EnableIf< 1239 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 1240 > > 1241 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1242 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1243 1244 template <class _Up, class = _EnableIf< 1245 !is_same<_Up, _Iter>::value && 1246 is_convertible<_Up const&, _Iter>::value && 1247 is_assignable<_Iter&, _Up const&>::value 1248 > > 1249 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1250 move_iterator& operator=(const move_iterator<_Up>& __u) { 1251 __i = __u.base(); 1252 return *this; 1253 } 1254 1255 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1256 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1257 reference operator*() const { return static_cast<reference>(*__i); } 1258 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1259 pointer operator->() const { return __i;} 1260 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1261 move_iterator& operator++() {++__i; return *this;} 1262 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1263 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1264 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1265 move_iterator& operator--() {--__i; return *this;} 1266 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1267 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1268 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1269 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1270 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1271 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1272 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1273 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1274 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1275 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1276 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1277 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 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 1320template <class _Iter1, class _Iter2> 1321inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1322bool 1323operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1324{ 1325 return __x.base() <= __y.base(); 1326} 1327 1328#ifndef _LIBCPP_CXX03_LANG 1329template <class _Iter1, class _Iter2> 1330inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1331auto 1332operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1333-> decltype(__x.base() - __y.base()) 1334{ 1335 return __x.base() - __y.base(); 1336} 1337#else 1338template <class _Iter1, class _Iter2> 1339inline _LIBCPP_INLINE_VISIBILITY 1340typename move_iterator<_Iter1>::difference_type 1341operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1342{ 1343 return __x.base() - __y.base(); 1344} 1345#endif 1346 1347template <class _Iter> 1348inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1349move_iterator<_Iter> 1350operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1351{ 1352 return move_iterator<_Iter>(__x.base() + __n); 1353} 1354 1355template <class _Iter> 1356inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1357move_iterator<_Iter> 1358make_move_iterator(_Iter __i) 1359{ 1360 return move_iterator<_Iter>(__i); 1361} 1362 1363// __wrap_iter 1364 1365template <class _Iter> class __wrap_iter; 1366 1367template <class _Iter1, class _Iter2> 1368_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1369bool 1370operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1371 1372template <class _Iter1, class _Iter2> 1373_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1374bool 1375operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1376 1377template <class _Iter1, class _Iter2> 1378_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1379bool 1380operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1381 1382template <class _Iter1, class _Iter2> 1383_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1384bool 1385operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1386 1387template <class _Iter1, class _Iter2> 1388_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1389bool 1390operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1391 1392template <class _Iter1, class _Iter2> 1393_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1394bool 1395operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1396 1397#ifndef _LIBCPP_CXX03_LANG 1398template <class _Iter1, class _Iter2> 1399_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1400auto 1401operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1402-> decltype(__x.base() - __y.base()); 1403#else 1404template <class _Iter1, class _Iter2> 1405_LIBCPP_INLINE_VISIBILITY 1406typename __wrap_iter<_Iter1>::difference_type 1407operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1408#endif 1409 1410template <class _Iter> 1411_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1412__wrap_iter<_Iter> 1413operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1414 1415template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1416template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1417template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1418template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1419 1420template <class _Iter> 1421class __wrap_iter 1422{ 1423public: 1424 typedef _Iter iterator_type; 1425 typedef typename iterator_traits<iterator_type>::value_type value_type; 1426 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1427 typedef typename iterator_traits<iterator_type>::pointer pointer; 1428 typedef typename iterator_traits<iterator_type>::reference reference; 1429 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1430#if _LIBCPP_STD_VER > 17 1431 typedef contiguous_iterator_tag iterator_concept; 1432#endif 1433 1434private: 1435 iterator_type __i; 1436public: 1437 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1438#if _LIBCPP_STD_VER > 11 1439 : __i{} 1440#endif 1441 { 1442#if _LIBCPP_DEBUG_LEVEL == 2 1443 __get_db()->__insert_i(this); 1444#endif 1445 } 1446 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1447 __wrap_iter(const __wrap_iter<_Up>& __u, 1448 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1449 : __i(__u.base()) 1450 { 1451#if _LIBCPP_DEBUG_LEVEL == 2 1452 __get_db()->__iterator_copy(this, &__u); 1453#endif 1454 } 1455#if _LIBCPP_DEBUG_LEVEL == 2 1456 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1457 __wrap_iter(const __wrap_iter& __x) 1458 : __i(__x.base()) 1459 { 1460 __get_db()->__iterator_copy(this, &__x); 1461 } 1462 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1463 __wrap_iter& operator=(const __wrap_iter& __x) 1464 { 1465 if (this != &__x) 1466 { 1467 __get_db()->__iterator_copy(this, &__x); 1468 __i = __x.__i; 1469 } 1470 return *this; 1471 } 1472 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1473 ~__wrap_iter() 1474 { 1475 __get_db()->__erase_i(this); 1476 } 1477#endif 1478 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference 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 *__i; 1485 } 1486 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1487 { 1488#if _LIBCPP_DEBUG_LEVEL == 2 1489 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1490 "Attempted to dereference a non-dereferenceable iterator"); 1491#endif 1492 return _VSTD::__to_address(__i); 1493 } 1494 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1495 { 1496#if _LIBCPP_DEBUG_LEVEL == 2 1497 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1498 "Attempted to increment a non-incrementable iterator"); 1499#endif 1500 ++__i; 1501 return *this; 1502 } 1503 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1504 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1505 1506 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1507 { 1508#if _LIBCPP_DEBUG_LEVEL == 2 1509 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1510 "Attempted to decrement a non-decrementable iterator"); 1511#endif 1512 --__i; 1513 return *this; 1514 } 1515 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1516 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1517 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1518 {__wrap_iter __w(*this); __w += __n; return __w;} 1519 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1520 { 1521#if _LIBCPP_DEBUG_LEVEL == 2 1522 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1523 "Attempted to add/subtract an iterator outside its valid range"); 1524#endif 1525 __i += __n; 1526 return *this; 1527 } 1528 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1529 {return *this + (-__n);} 1530 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1531 {*this += -__n; return *this;} 1532 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1533 { 1534#if _LIBCPP_DEBUG_LEVEL == 2 1535 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1536 "Attempted to subscript an iterator outside its valid range"); 1537#endif 1538 return __i[__n]; 1539 } 1540 1541 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1542 1543private: 1544#if _LIBCPP_DEBUG_LEVEL == 2 1545 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1546 { 1547 __get_db()->__insert_ic(this, __p); 1548 } 1549#else 1550 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1551#endif 1552 1553 template <class _Up> friend class __wrap_iter; 1554 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1555 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1556 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1557 1558 template <class _Iter1, class _Iter2> 1559 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1560 bool 1561 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1562 1563 template <class _Iter1, class _Iter2> 1564 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1565 bool 1566 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1567 1568 template <class _Iter1, class _Iter2> 1569 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1570 bool 1571 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1572 1573 template <class _Iter1, class _Iter2> 1574 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1575 bool 1576 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1577 1578 template <class _Iter1, class _Iter2> 1579 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1580 bool 1581 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1582 1583 template <class _Iter1, class _Iter2> 1584 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1585 bool 1586 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1587 1588#ifndef _LIBCPP_CXX03_LANG 1589 template <class _Iter1, class _Iter2> 1590 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1591 auto 1592 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1593 -> decltype(__x.base() - __y.base()); 1594#else 1595 template <class _Iter1, class _Iter2> 1596 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1597 typename __wrap_iter<_Iter1>::difference_type 1598 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1599#endif 1600 1601 template <class _Iter1> 1602 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1603 __wrap_iter<_Iter1> 1604 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1605}; 1606 1607#if _LIBCPP_STD_VER <= 17 1608template <class _It> 1609struct __is_cpp17_contiguous_iterator<__wrap_iter<_It> > : true_type {}; 1610#endif 1611 1612template <class _Iter> 1613_LIBCPP_CONSTEXPR 1614decltype(_VSTD::__to_address(declval<_Iter>())) 1615__to_address(__wrap_iter<_Iter> __w) _NOEXCEPT { 1616 return _VSTD::__to_address(__w.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 return __x.base() == __y.base(); 1625} 1626 1627template <class _Iter1, class _Iter2> 1628inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1629bool 1630operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1631{ 1632#if _LIBCPP_DEBUG_LEVEL == 2 1633 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1634 "Attempted to compare incomparable iterators"); 1635#endif 1636 return __x.base() < __y.base(); 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 !(__x == __y); 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 __y < __x; 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 !(__x < __y); 1661} 1662 1663template <class _Iter1, class _Iter2> 1664inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1665bool 1666operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1667{ 1668 return !(__y < __x); 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 !(__x == __y); 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 __y < __x; 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 !(__x < __y); 1693} 1694 1695template <class _Iter1> 1696inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1697bool 1698operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1699{ 1700 return !(__y < __x); 1701} 1702 1703#ifndef _LIBCPP_CXX03_LANG 1704template <class _Iter1, class _Iter2> 1705inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1706auto 1707operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1708-> decltype(__x.base() - __y.base()) 1709{ 1710#if _LIBCPP_DEBUG_LEVEL == 2 1711 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1712 "Attempted to subtract incompatible iterators"); 1713#endif 1714 return __x.base() - __y.base(); 1715} 1716#else 1717template <class _Iter1, class _Iter2> 1718inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1719typename __wrap_iter<_Iter1>::difference_type 1720operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1721{ 1722#if _LIBCPP_DEBUG_LEVEL == 2 1723 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1724 "Attempted to subtract incompatible iterators"); 1725#endif 1726 return __x.base() - __y.base(); 1727} 1728#endif 1729 1730template <class _Iter> 1731inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1732__wrap_iter<_Iter> 1733operator+(typename __wrap_iter<_Iter>::difference_type __n, 1734 __wrap_iter<_Iter> __x) _NOEXCEPT 1735{ 1736 __x += __n; 1737 return __x; 1738} 1739 1740template <class _Tp, size_t _Np> 1741_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1742_Tp* 1743begin(_Tp (&__array)[_Np]) 1744{ 1745 return __array; 1746} 1747 1748template <class _Tp, size_t _Np> 1749_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1750_Tp* 1751end(_Tp (&__array)[_Np]) 1752{ 1753 return __array + _Np; 1754} 1755 1756#if !defined(_LIBCPP_CXX03_LANG) 1757 1758template <class _Cp> 1759_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1760auto 1761begin(_Cp& __c) -> decltype(__c.begin()) 1762{ 1763 return __c.begin(); 1764} 1765 1766template <class _Cp> 1767_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1768auto 1769begin(const _Cp& __c) -> decltype(__c.begin()) 1770{ 1771 return __c.begin(); 1772} 1773 1774template <class _Cp> 1775_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1776auto 1777end(_Cp& __c) -> decltype(__c.end()) 1778{ 1779 return __c.end(); 1780} 1781 1782template <class _Cp> 1783_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1784auto 1785end(const _Cp& __c) -> decltype(__c.end()) 1786{ 1787 return __c.end(); 1788} 1789 1790#if _LIBCPP_STD_VER > 11 1791 1792template <class _Tp, size_t _Np> 1793_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1794reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1795{ 1796 return reverse_iterator<_Tp*>(__array + _Np); 1797} 1798 1799template <class _Tp, size_t _Np> 1800_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1801reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1802{ 1803 return reverse_iterator<_Tp*>(__array); 1804} 1805 1806template <class _Ep> 1807_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1808reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1809{ 1810 return reverse_iterator<const _Ep*>(__il.end()); 1811} 1812 1813template <class _Ep> 1814_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1815reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1816{ 1817 return reverse_iterator<const _Ep*>(__il.begin()); 1818} 1819 1820template <class _Cp> 1821_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1822auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1823{ 1824 return _VSTD::begin(__c); 1825} 1826 1827template <class _Cp> 1828_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1829auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1830{ 1831 return _VSTD::end(__c); 1832} 1833 1834template <class _Cp> 1835_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1836auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1837{ 1838 return __c.rbegin(); 1839} 1840 1841template <class _Cp> 1842_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1843auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1844{ 1845 return __c.rbegin(); 1846} 1847 1848template <class _Cp> 1849_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1850auto rend(_Cp& __c) -> decltype(__c.rend()) 1851{ 1852 return __c.rend(); 1853} 1854 1855template <class _Cp> 1856_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1857auto rend(const _Cp& __c) -> decltype(__c.rend()) 1858{ 1859 return __c.rend(); 1860} 1861 1862template <class _Cp> 1863_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1864auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1865{ 1866 return _VSTD::rbegin(__c); 1867} 1868 1869template <class _Cp> 1870_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1871auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1872{ 1873 return _VSTD::rend(__c); 1874} 1875 1876#endif 1877 1878 1879#else // defined(_LIBCPP_CXX03_LANG) 1880 1881template <class _Cp> 1882_LIBCPP_INLINE_VISIBILITY 1883typename _Cp::iterator 1884begin(_Cp& __c) 1885{ 1886 return __c.begin(); 1887} 1888 1889template <class _Cp> 1890_LIBCPP_INLINE_VISIBILITY 1891typename _Cp::const_iterator 1892begin(const _Cp& __c) 1893{ 1894 return __c.begin(); 1895} 1896 1897template <class _Cp> 1898_LIBCPP_INLINE_VISIBILITY 1899typename _Cp::iterator 1900end(_Cp& __c) 1901{ 1902 return __c.end(); 1903} 1904 1905template <class _Cp> 1906_LIBCPP_INLINE_VISIBILITY 1907typename _Cp::const_iterator 1908end(const _Cp& __c) 1909{ 1910 return __c.end(); 1911} 1912 1913#endif // !defined(_LIBCPP_CXX03_LANG) 1914 1915#if _LIBCPP_STD_VER > 14 1916 1917// #if _LIBCPP_STD_VER > 11 1918// template <> 1919// struct _LIBCPP_TEMPLATE_VIS plus<void> 1920// { 1921// template <class _T1, class _T2> 1922// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1923// auto operator()(_T1&& __t, _T2&& __u) const 1924// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1925// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1926// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1927// typedef void is_transparent; 1928// }; 1929// #endif 1930 1931template <class _Cont> 1932_LIBCPP_INLINE_VISIBILITY 1933constexpr auto size(const _Cont& __c) 1934_NOEXCEPT_(noexcept(__c.size())) 1935-> decltype (__c.size()) 1936{ return __c.size(); } 1937 1938template <class _Tp, size_t _Sz> 1939_LIBCPP_INLINE_VISIBILITY 1940constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1941 1942#if _LIBCPP_STD_VER > 17 1943template <class _Cont> 1944_LIBCPP_INLINE_VISIBILITY 1945constexpr auto ssize(const _Cont& __c) 1946_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1947-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1948{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1949 1950template <class _Tp, ptrdiff_t _Sz> 1951_LIBCPP_INLINE_VISIBILITY 1952constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1953#endif 1954 1955template <class _Cont> 1956_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1957constexpr auto empty(const _Cont& __c) 1958_NOEXCEPT_(noexcept(__c.empty())) 1959-> decltype (__c.empty()) 1960{ return __c.empty(); } 1961 1962template <class _Tp, size_t _Sz> 1963_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1964constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1965 1966template <class _Ep> 1967_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1968constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1969 1970template <class _Cont> constexpr 1971_LIBCPP_INLINE_VISIBILITY 1972auto data(_Cont& __c) 1973_NOEXCEPT_(noexcept(__c.data())) 1974-> decltype (__c.data()) 1975{ return __c.data(); } 1976 1977template <class _Cont> constexpr 1978_LIBCPP_INLINE_VISIBILITY 1979auto data(const _Cont& __c) 1980_NOEXCEPT_(noexcept(__c.data())) 1981-> decltype (__c.data()) 1982{ return __c.data(); } 1983 1984template <class _Tp, size_t _Sz> 1985_LIBCPP_INLINE_VISIBILITY 1986constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1987 1988template <class _Ep> 1989_LIBCPP_INLINE_VISIBILITY 1990constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1991#endif 1992 1993template <class _Container, class _Predicate> 1994typename _Container::size_type 1995__libcpp_erase_if_container(_Container& __c, _Predicate& __pred) { 1996 typename _Container::size_type __old_size = __c.size(); 1997 1998 const typename _Container::iterator __last = __c.end(); 1999 for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) { 2000 if (__pred(*__iter)) 2001 __iter = __c.erase(__iter); 2002 else 2003 ++__iter; 2004 } 2005 2006 return __old_size - __c.size(); 2007} 2008 2009_LIBCPP_END_NAMESPACE_STD 2010 2011#endif // _LIBCPP_ITERATOR 2012