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 <compare> 574#include <concepts> // Mandated by the Standard. 575#include <cstddef> 576#include <initializer_list> 577#include <iosfwd> // for forward declarations of vector and string 578#include <type_traits> 579#include <version> 580 581#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 582#pragma GCC system_header 583#endif 584 585_LIBCPP_BEGIN_NAMESPACE_STD 586 587template<class _Category, class _Tp, class _Distance = ptrdiff_t, 588 class _Pointer = _Tp*, class _Reference = _Tp&> 589struct _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 iterator 590{ 591 typedef _Tp value_type; 592 typedef _Distance difference_type; 593 typedef _Pointer pointer; 594 typedef _Reference reference; 595 typedef _Category iterator_category; 596}; 597 598template <class _InputIter> 599inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 600typename iterator_traits<_InputIter>::difference_type 601__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 602{ 603 typename iterator_traits<_InputIter>::difference_type __r(0); 604 for (; __first != __last; ++__first) 605 ++__r; 606 return __r; 607} 608 609template <class _RandIter> 610inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 611typename iterator_traits<_RandIter>::difference_type 612__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 613{ 614 return __last - __first; 615} 616 617template <class _InputIter> 618inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 619typename iterator_traits<_InputIter>::difference_type 620distance(_InputIter __first, _InputIter __last) 621{ 622 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 623} 624 625template <class _Tp, class = void> 626struct __is_stashing_iterator : false_type {}; 627 628template <class _Tp> 629struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 630 : true_type {}; 631 632_LIBCPP_SUPPRESS_DEPRECATED_PUSH 633template <class _Iter> 634class _LIBCPP_TEMPLATE_VIS reverse_iterator 635#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 636 : public iterator<typename iterator_traits<_Iter>::iterator_category, 637 typename iterator_traits<_Iter>::value_type, 638 typename iterator_traits<_Iter>::difference_type, 639 typename iterator_traits<_Iter>::pointer, 640 typename iterator_traits<_Iter>::reference> 641#endif 642{ 643_LIBCPP_SUPPRESS_DEPRECATED_POP 644private: 645#ifndef _LIBCPP_ABI_NO_ITERATOR_BASES 646 _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 647#endif 648 649 static_assert(!__is_stashing_iterator<_Iter>::value, 650 "The specified iterator type cannot be used with reverse_iterator; " 651 "Using stashing iterators with reverse_iterator causes undefined behavior"); 652 653protected: 654 _Iter current; 655public: 656 typedef _Iter iterator_type; 657 typedef typename iterator_traits<_Iter>::difference_type difference_type; 658 typedef typename iterator_traits<_Iter>::reference reference; 659 typedef typename iterator_traits<_Iter>::pointer pointer; 660 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 661 random_access_iterator_tag, 662 typename iterator_traits<_Iter>::iterator_category> iterator_category; 663 typedef typename iterator_traits<_Iter>::value_type value_type; 664 665#if _LIBCPP_STD_VER > 17 666 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 667 random_access_iterator_tag, 668 bidirectional_iterator_tag> iterator_concept; 669#endif 670 671#ifndef _LIBCPP_ABI_NO_ITERATOR_BASES 672 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 673 reverse_iterator() : __t(), current() {} 674 675 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 676 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 677 678 template <class _Up, class = _EnableIf< 679 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 680 > > 681 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 682 reverse_iterator(const reverse_iterator<_Up>& __u) 683 : __t(__u.base()), current(__u.base()) 684 { } 685 686 template <class _Up, class = _EnableIf< 687 !is_same<_Up, _Iter>::value && 688 is_convertible<_Up const&, _Iter>::value && 689 is_assignable<_Up const&, _Iter>::value 690 > > 691 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 692 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) { 693 __t = current = __u.base(); 694 return *this; 695 } 696#else 697 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 698 reverse_iterator() : current() {} 699 700 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 701 explicit reverse_iterator(_Iter __x) : current(__x) {} 702 703 template <class _Up, class = _EnableIf< 704 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 705 > > 706 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 707 reverse_iterator(const reverse_iterator<_Up>& __u) 708 : current(__u.base()) 709 { } 710 711 template <class _Up, class = _EnableIf< 712 !is_same<_Up, _Iter>::value && 713 is_convertible<_Up const&, _Iter>::value && 714 is_assignable<_Up const&, _Iter>::value 715 > > 716 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 717 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) { 718 current = __u.base(); 719 return *this; 720 } 721#endif 722 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 723 _Iter base() const {return current;} 724 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 725 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 726 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 727 pointer operator->() const {return _VSTD::addressof(operator*());} 728 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 729 reverse_iterator& operator++() {--current; return *this;} 730 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 731 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 732 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 733 reverse_iterator& operator--() {++current; return *this;} 734 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 735 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 736 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 737 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 738 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 739 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 740 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 741 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 742 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 743 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 744 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 745 reference operator[](difference_type __n) const {return *(*this + __n);} 746}; 747 748template <class _Iter1, class _Iter2> 749inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 750bool 751operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 752{ 753 return __x.base() == __y.base(); 754} 755 756template <class _Iter1, class _Iter2> 757inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 758bool 759operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 760{ 761 return __x.base() > __y.base(); 762} 763 764template <class _Iter1, class _Iter2> 765inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 766bool 767operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 768{ 769 return __x.base() != __y.base(); 770} 771 772template <class _Iter1, class _Iter2> 773inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 774bool 775operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 776{ 777 return __x.base() < __y.base(); 778} 779 780template <class _Iter1, class _Iter2> 781inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 782bool 783operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 784{ 785 return __x.base() <= __y.base(); 786} 787 788template <class _Iter1, class _Iter2> 789inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 790bool 791operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 792{ 793 return __x.base() >= __y.base(); 794} 795 796#ifndef _LIBCPP_CXX03_LANG 797template <class _Iter1, class _Iter2> 798inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 799auto 800operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 801-> decltype(__y.base() - __x.base()) 802{ 803 return __y.base() - __x.base(); 804} 805#else 806template <class _Iter1, class _Iter2> 807inline _LIBCPP_INLINE_VISIBILITY 808typename reverse_iterator<_Iter1>::difference_type 809operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 810{ 811 return __y.base() - __x.base(); 812} 813#endif 814 815template <class _Iter> 816inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 817reverse_iterator<_Iter> 818operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 819{ 820 return reverse_iterator<_Iter>(__x.base() - __n); 821} 822 823#if _LIBCPP_STD_VER > 11 824template <class _Iter> 825inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 826reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 827{ 828 return reverse_iterator<_Iter>(__i); 829} 830#endif 831 832_LIBCPP_SUPPRESS_DEPRECATED_PUSH 833template <class _Container> 834class _LIBCPP_TEMPLATE_VIS back_insert_iterator 835#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 836 : public iterator<output_iterator_tag, void, void, void, void> 837#endif 838{ 839_LIBCPP_SUPPRESS_DEPRECATED_POP 840protected: 841 _Container* container; 842public: 843 typedef output_iterator_tag iterator_category; 844 typedef void value_type; 845#if _LIBCPP_STD_VER > 17 846 typedef ptrdiff_t difference_type; 847#else 848 typedef void difference_type; 849#endif 850 typedef void pointer; 851 typedef void reference; 852 typedef _Container container_type; 853 854 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 855 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_) 856 {container->push_back(__value_); return *this;} 857#ifndef _LIBCPP_CXX03_LANG 858 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_) 859 {container->push_back(_VSTD::move(__value_)); return *this;} 860#endif // _LIBCPP_CXX03_LANG 861 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator*() {return *this;} 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++(int) {return *this;} 864}; 865 866template <class _Container> 867inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 868back_insert_iterator<_Container> 869back_inserter(_Container& __x) 870{ 871 return back_insert_iterator<_Container>(__x); 872} 873 874_LIBCPP_SUPPRESS_DEPRECATED_PUSH 875template <class _Container> 876class _LIBCPP_TEMPLATE_VIS front_insert_iterator 877#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 878 : public iterator<output_iterator_tag, void, void, void, void> 879#endif 880{ 881_LIBCPP_SUPPRESS_DEPRECATED_POP 882protected: 883 _Container* container; 884public: 885 typedef output_iterator_tag iterator_category; 886 typedef void value_type; 887#if _LIBCPP_STD_VER > 17 888 typedef ptrdiff_t difference_type; 889#else 890 typedef void difference_type; 891#endif 892 typedef void pointer; 893 typedef void reference; 894 typedef _Container container_type; 895 896 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 897 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) 898 {container->push_front(__value_); return *this;} 899#ifndef _LIBCPP_CXX03_LANG 900 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) 901 {container->push_front(_VSTD::move(__value_)); return *this;} 902#endif // _LIBCPP_CXX03_LANG 903 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator*() {return *this;} 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++(int) {return *this;} 906}; 907 908template <class _Container> 909inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 910front_insert_iterator<_Container> 911front_inserter(_Container& __x) 912{ 913 return front_insert_iterator<_Container>(__x); 914} 915 916_LIBCPP_SUPPRESS_DEPRECATED_PUSH 917template <class _Container> 918class _LIBCPP_TEMPLATE_VIS insert_iterator 919#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 920 : public iterator<output_iterator_tag, void, void, void, void> 921#endif 922{ 923_LIBCPP_SUPPRESS_DEPRECATED_POP 924protected: 925 _Container* container; 926 typename _Container::iterator iter; // FIXME: `ranges::iterator_t<Container>` in C++20 mode 927public: 928 typedef output_iterator_tag iterator_category; 929 typedef void value_type; 930#if _LIBCPP_STD_VER > 17 931 typedef ptrdiff_t difference_type; 932#else 933 typedef void difference_type; 934#endif 935 typedef void pointer; 936 typedef void reference; 937 typedef _Container container_type; 938 939 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, typename _Container::iterator __i) 940 : container(_VSTD::addressof(__x)), iter(__i) {} 941 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(const typename _Container::value_type& __value_) 942 {iter = container->insert(iter, __value_); ++iter; return *this;} 943#ifndef _LIBCPP_CXX03_LANG 944 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(typename _Container::value_type&& __value_) 945 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 946#endif // _LIBCPP_CXX03_LANG 947 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator*() {return *this;} 948 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++() {return *this;} 949 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int) {return *this;} 950}; 951 952template <class _Container> 953inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 954insert_iterator<_Container> 955inserter(_Container& __x, typename _Container::iterator __i) 956{ 957 return insert_iterator<_Container>(__x, __i); 958} 959 960_LIBCPP_SUPPRESS_DEPRECATED_PUSH 961template <class _Tp, class _CharT = char, 962 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 963class _LIBCPP_TEMPLATE_VIS istream_iterator 964#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 965 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 966#endif 967{ 968_LIBCPP_SUPPRESS_DEPRECATED_POP 969public: 970 typedef input_iterator_tag iterator_category; 971 typedef _Tp value_type; 972 typedef _Distance difference_type; 973 typedef const _Tp* pointer; 974 typedef const _Tp& reference; 975 typedef _CharT char_type; 976 typedef _Traits traits_type; 977 typedef basic_istream<_CharT,_Traits> istream_type; 978private: 979 istream_type* __in_stream_; 980 _Tp __value_; 981public: 982 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 983 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 984 { 985 if (!(*__in_stream_ >> __value_)) 986 __in_stream_ = nullptr; 987 } 988 989 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 990 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 991 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 992 { 993 if (!(*__in_stream_ >> __value_)) 994 __in_stream_ = nullptr; 995 return *this; 996 } 997 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 998 {istream_iterator __t(*this); ++(*this); return __t;} 999 1000 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1001 friend _LIBCPP_INLINE_VISIBILITY 1002 bool 1003 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1004 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1005 1006 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1007 friend _LIBCPP_INLINE_VISIBILITY 1008 bool 1009 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1010 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1011}; 1012 1013template <class _Tp, class _CharT, class _Traits, class _Distance> 1014inline _LIBCPP_INLINE_VISIBILITY 1015bool 1016operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1017 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1018{ 1019 return __x.__in_stream_ == __y.__in_stream_; 1020} 1021 1022template <class _Tp, class _CharT, class _Traits, class _Distance> 1023inline _LIBCPP_INLINE_VISIBILITY 1024bool 1025operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1026 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1027{ 1028 return !(__x == __y); 1029} 1030 1031_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1032template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 1033class _LIBCPP_TEMPLATE_VIS ostream_iterator 1034#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1035 : public iterator<output_iterator_tag, void, void, void, void> 1036#endif 1037{ 1038_LIBCPP_SUPPRESS_DEPRECATED_POP 1039public: 1040 typedef output_iterator_tag iterator_category; 1041 typedef void value_type; 1042#if _LIBCPP_STD_VER > 17 1043 typedef ptrdiff_t difference_type; 1044#else 1045 typedef void difference_type; 1046#endif 1047 typedef void pointer; 1048 typedef void reference; 1049 typedef _CharT char_type; 1050 typedef _Traits traits_type; 1051 typedef basic_ostream<_CharT, _Traits> ostream_type; 1052 1053private: 1054 ostream_type* __out_stream_; 1055 const char_type* __delim_; 1056public: 1057 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 1058 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 1059 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 1060 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 1061 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1062 { 1063 *__out_stream_ << __value_; 1064 if (__delim_) 1065 *__out_stream_ << __delim_; 1066 return *this; 1067 } 1068 1069 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1070 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1071 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1072}; 1073 1074_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1075template<class _CharT, class _Traits> 1076class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1077#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1078 : public iterator<input_iterator_tag, _CharT, 1079 typename _Traits::off_type, _CharT*, 1080 _CharT> 1081#endif 1082{ 1083_LIBCPP_SUPPRESS_DEPRECATED_POP 1084public: 1085 typedef input_iterator_tag iterator_category; 1086 typedef _CharT value_type; 1087 typedef typename _Traits::off_type difference_type; 1088 typedef _CharT* pointer; 1089 typedef _CharT reference; 1090 typedef _CharT char_type; 1091 typedef _Traits traits_type; 1092 typedef typename _Traits::int_type int_type; 1093 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1094 typedef basic_istream<_CharT,_Traits> istream_type; 1095private: 1096 mutable streambuf_type* __sbuf_; 1097 1098 class __proxy 1099 { 1100 char_type __keep_; 1101 streambuf_type* __sbuf_; 1102 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1103 : __keep_(__c), __sbuf_(__s) {} 1104 friend class istreambuf_iterator; 1105 public: 1106 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1107 }; 1108 1109 _LIBCPP_INLINE_VISIBILITY 1110 bool __test_for_eof() const 1111 { 1112 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1113 __sbuf_ = nullptr; 1114 return __sbuf_ == nullptr; 1115 } 1116public: 1117 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 1118 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1119 : __sbuf_(__s.rdbuf()) {} 1120 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1121 : __sbuf_(__s) {} 1122 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1123 : __sbuf_(__p.__sbuf_) {} 1124 1125 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1126 {return static_cast<char_type>(__sbuf_->sgetc());} 1127 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1128 { 1129 __sbuf_->sbumpc(); 1130 return *this; 1131 } 1132 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1133 { 1134 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1135 } 1136 1137 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1138 {return __test_for_eof() == __b.__test_for_eof();} 1139}; 1140 1141template <class _CharT, class _Traits> 1142inline _LIBCPP_INLINE_VISIBILITY 1143bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1144 const istreambuf_iterator<_CharT,_Traits>& __b) 1145 {return __a.equal(__b);} 1146 1147template <class _CharT, class _Traits> 1148inline _LIBCPP_INLINE_VISIBILITY 1149bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1150 const istreambuf_iterator<_CharT,_Traits>& __b) 1151 {return !__a.equal(__b);} 1152 1153_LIBCPP_SUPPRESS_DEPRECATED_PUSH 1154template <class _CharT, class _Traits> 1155class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1156#if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 1157 : public iterator<output_iterator_tag, void, void, void, void> 1158#endif 1159{ 1160_LIBCPP_SUPPRESS_DEPRECATED_POP 1161public: 1162 typedef output_iterator_tag iterator_category; 1163 typedef void value_type; 1164#if _LIBCPP_STD_VER > 17 1165 typedef ptrdiff_t difference_type; 1166#else 1167 typedef void difference_type; 1168#endif 1169 typedef void pointer; 1170 typedef void reference; 1171 typedef _CharT char_type; 1172 typedef _Traits traits_type; 1173 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1174 typedef basic_ostream<_CharT, _Traits> ostream_type; 1175 1176private: 1177 streambuf_type* __sbuf_; 1178public: 1179 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1180 : __sbuf_(__s.rdbuf()) {} 1181 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1182 : __sbuf_(__s) {} 1183 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1184 { 1185 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1186 __sbuf_ = nullptr; 1187 return *this; 1188 } 1189 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1190 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1191 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1192 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1193 1194 template <class _Ch, class _Tr> 1195 friend 1196 _LIBCPP_HIDDEN 1197 ostreambuf_iterator<_Ch, _Tr> 1198 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1199 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1200 ios_base& __iob, _Ch __fl); 1201}; 1202 1203template <class _Iter> 1204class _LIBCPP_TEMPLATE_VIS move_iterator 1205{ 1206private: 1207 _Iter __i; 1208public: 1209 typedef _Iter iterator_type; 1210 typedef typename iterator_traits<iterator_type>::value_type value_type; 1211 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1212 typedef iterator_type pointer; 1213 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 1214 random_access_iterator_tag, 1215 typename iterator_traits<_Iter>::iterator_category> iterator_category; 1216#if _LIBCPP_STD_VER > 17 1217 typedef input_iterator_tag iterator_concept; 1218#endif 1219 1220#ifndef _LIBCPP_CXX03_LANG 1221 typedef typename iterator_traits<iterator_type>::reference __reference; 1222 typedef typename conditional< 1223 is_reference<__reference>::value, 1224 typename remove_reference<__reference>::type&&, 1225 __reference 1226 >::type reference; 1227#else 1228 typedef typename iterator_traits<iterator_type>::reference reference; 1229#endif 1230 1231 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1232 move_iterator() : __i() {} 1233 1234 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1235 explicit move_iterator(_Iter __x) : __i(__x) {} 1236 1237 template <class _Up, class = _EnableIf< 1238 !is_same<_Up, _Iter>::value && is_convertible<_Up const&, _Iter>::value 1239 > > 1240 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1241 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1242 1243 template <class _Up, class = _EnableIf< 1244 !is_same<_Up, _Iter>::value && 1245 is_convertible<_Up const&, _Iter>::value && 1246 is_assignable<_Iter&, _Up const&>::value 1247 > > 1248 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1249 move_iterator& operator=(const move_iterator<_Up>& __u) { 1250 __i = __u.base(); 1251 return *this; 1252 } 1253 1254 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1255 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1256 reference operator*() const { return static_cast<reference>(*__i); } 1257 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1258 pointer operator->() const { return __i;} 1259 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1260 move_iterator& operator++() {++__i; return *this;} 1261 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1262 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1263 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1264 move_iterator& operator--() {--__i; return *this;} 1265 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1266 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1267 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1268 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1269 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1270 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1271 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1272 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1273 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1274 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1275 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1276 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1277}; 1278 1279template <class _Iter1, class _Iter2> 1280inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1281bool 1282operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1283{ 1284 return __x.base() == __y.base(); 1285} 1286 1287template <class _Iter1, class _Iter2> 1288inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1289bool 1290operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1291{ 1292 return __x.base() < __y.base(); 1293} 1294 1295template <class _Iter1, class _Iter2> 1296inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1297bool 1298operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1299{ 1300 return __x.base() != __y.base(); 1301} 1302 1303template <class _Iter1, class _Iter2> 1304inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1305bool 1306operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1307{ 1308 return __x.base() > __y.base(); 1309} 1310 1311template <class _Iter1, class _Iter2> 1312inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1313bool 1314operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1315{ 1316 return __x.base() >= __y.base(); 1317} 1318 1319template <class _Iter1, class _Iter2> 1320inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1321bool 1322operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1323{ 1324 return __x.base() <= __y.base(); 1325} 1326 1327#ifndef _LIBCPP_CXX03_LANG 1328template <class _Iter1, class _Iter2> 1329inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1330auto 1331operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1332-> decltype(__x.base() - __y.base()) 1333{ 1334 return __x.base() - __y.base(); 1335} 1336#else 1337template <class _Iter1, class _Iter2> 1338inline _LIBCPP_INLINE_VISIBILITY 1339typename move_iterator<_Iter1>::difference_type 1340operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1341{ 1342 return __x.base() - __y.base(); 1343} 1344#endif 1345 1346template <class _Iter> 1347inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1348move_iterator<_Iter> 1349operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1350{ 1351 return move_iterator<_Iter>(__x.base() + __n); 1352} 1353 1354template <class _Iter> 1355inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1356move_iterator<_Iter> 1357make_move_iterator(_Iter __i) 1358{ 1359 return move_iterator<_Iter>(__i); 1360} 1361 1362// __wrap_iter 1363 1364template <class _Iter> class __wrap_iter; 1365 1366template <class _Iter1, class _Iter2> 1367_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1368bool 1369operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1370 1371template <class _Iter1, class _Iter2> 1372_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1373bool 1374operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1375 1376template <class _Iter1, class _Iter2> 1377_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1378bool 1379operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1380 1381template <class _Iter1, class _Iter2> 1382_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1383bool 1384operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1385 1386template <class _Iter1, class _Iter2> 1387_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1388bool 1389operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1390 1391template <class _Iter1, class _Iter2> 1392_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1393bool 1394operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1395 1396#ifndef _LIBCPP_CXX03_LANG 1397template <class _Iter1, class _Iter2> 1398_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1399auto 1400operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1401-> decltype(__x.base() - __y.base()); 1402#else 1403template <class _Iter1, class _Iter2> 1404_LIBCPP_INLINE_VISIBILITY 1405typename __wrap_iter<_Iter1>::difference_type 1406operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1407#endif 1408 1409template <class _Iter> 1410_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1411__wrap_iter<_Iter> 1412operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1413 1414template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1415template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1416template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1417template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1418 1419template <class _Iter> 1420class __wrap_iter 1421{ 1422public: 1423 typedef _Iter iterator_type; 1424 typedef typename iterator_traits<iterator_type>::value_type value_type; 1425 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1426 typedef typename iterator_traits<iterator_type>::pointer pointer; 1427 typedef typename iterator_traits<iterator_type>::reference reference; 1428 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1429#if _LIBCPP_STD_VER > 17 1430 typedef contiguous_iterator_tag iterator_concept; 1431#endif 1432 1433private: 1434 iterator_type __i; 1435public: 1436 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1437#if _LIBCPP_STD_VER > 11 1438 : __i{} 1439#endif 1440 { 1441#if _LIBCPP_DEBUG_LEVEL == 2 1442 __get_db()->__insert_i(this); 1443#endif 1444 } 1445 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1446 __wrap_iter(const __wrap_iter<_Up>& __u, 1447 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1448 : __i(__u.base()) 1449 { 1450#if _LIBCPP_DEBUG_LEVEL == 2 1451 __get_db()->__iterator_copy(this, &__u); 1452#endif 1453 } 1454#if _LIBCPP_DEBUG_LEVEL == 2 1455 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1456 __wrap_iter(const __wrap_iter& __x) 1457 : __i(__x.base()) 1458 { 1459 __get_db()->__iterator_copy(this, &__x); 1460 } 1461 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1462 __wrap_iter& operator=(const __wrap_iter& __x) 1463 { 1464 if (this != &__x) 1465 { 1466 __get_db()->__iterator_copy(this, &__x); 1467 __i = __x.__i; 1468 } 1469 return *this; 1470 } 1471 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1472 ~__wrap_iter() 1473 { 1474 __get_db()->__erase_i(this); 1475 } 1476#endif 1477 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1478 { 1479#if _LIBCPP_DEBUG_LEVEL == 2 1480 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1481 "Attempted to dereference a non-dereferenceable iterator"); 1482#endif 1483 return *__i; 1484 } 1485 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1486 { 1487#if _LIBCPP_DEBUG_LEVEL == 2 1488 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1489 "Attempted to dereference a non-dereferenceable iterator"); 1490#endif 1491 return _VSTD::__to_address(__i); 1492 } 1493 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1494 { 1495#if _LIBCPP_DEBUG_LEVEL == 2 1496 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1497 "Attempted to increment a non-incrementable iterator"); 1498#endif 1499 ++__i; 1500 return *this; 1501 } 1502 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1503 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1504 1505 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1506 { 1507#if _LIBCPP_DEBUG_LEVEL == 2 1508 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1509 "Attempted to decrement a non-decrementable iterator"); 1510#endif 1511 --__i; 1512 return *this; 1513 } 1514 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1515 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1516 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1517 {__wrap_iter __w(*this); __w += __n; return __w;} 1518 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1519 { 1520#if _LIBCPP_DEBUG_LEVEL == 2 1521 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1522 "Attempted to add/subtract an iterator outside its valid range"); 1523#endif 1524 __i += __n; 1525 return *this; 1526 } 1527 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1528 {return *this + (-__n);} 1529 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1530 {*this += -__n; return *this;} 1531 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1532 { 1533#if _LIBCPP_DEBUG_LEVEL == 2 1534 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1535 "Attempted to subscript an iterator outside its valid range"); 1536#endif 1537 return __i[__n]; 1538 } 1539 1540 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1541 1542private: 1543#if _LIBCPP_DEBUG_LEVEL == 2 1544 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1545 { 1546 __get_db()->__insert_ic(this, __p); 1547 } 1548#else 1549 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1550#endif 1551 1552 template <class _Up> friend class __wrap_iter; 1553 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1554 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1555 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1556 1557 template <class _Iter1, class _Iter2> 1558 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1559 bool 1560 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1561 1562 template <class _Iter1, class _Iter2> 1563 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1564 bool 1565 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1566 1567 template <class _Iter1, class _Iter2> 1568 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1569 bool 1570 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1571 1572 template <class _Iter1, class _Iter2> 1573 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1574 bool 1575 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1576 1577 template <class _Iter1, class _Iter2> 1578 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1579 bool 1580 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1581 1582 template <class _Iter1, class _Iter2> 1583 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1584 bool 1585 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1586 1587#ifndef _LIBCPP_CXX03_LANG 1588 template <class _Iter1, class _Iter2> 1589 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1590 auto 1591 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1592 -> decltype(__x.base() - __y.base()); 1593#else 1594 template <class _Iter1, class _Iter2> 1595 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1596 typename __wrap_iter<_Iter1>::difference_type 1597 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1598#endif 1599 1600 template <class _Iter1> 1601 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1602 __wrap_iter<_Iter1> 1603 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1604}; 1605 1606#if _LIBCPP_STD_VER <= 17 1607template <class _It> 1608struct __is_cpp17_contiguous_iterator<__wrap_iter<_It> > : true_type {}; 1609#endif 1610 1611template <class _Iter> 1612_LIBCPP_CONSTEXPR 1613decltype(_VSTD::__to_address(declval<_Iter>())) 1614__to_address(__wrap_iter<_Iter> __w) _NOEXCEPT { 1615 return _VSTD::__to_address(__w.base()); 1616} 1617 1618template <class _Iter1, class _Iter2> 1619inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1620bool 1621operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1622{ 1623 return __x.base() == __y.base(); 1624} 1625 1626template <class _Iter1, class _Iter2> 1627inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1628bool 1629operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1630{ 1631#if _LIBCPP_DEBUG_LEVEL == 2 1632 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1633 "Attempted to compare incomparable iterators"); 1634#endif 1635 return __x.base() < __y.base(); 1636} 1637 1638template <class _Iter1, class _Iter2> 1639inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1640bool 1641operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1642{ 1643 return !(__x == __y); 1644} 1645 1646template <class _Iter1, class _Iter2> 1647inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1648bool 1649operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1650{ 1651 return __y < __x; 1652} 1653 1654template <class _Iter1, class _Iter2> 1655inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1656bool 1657operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1658{ 1659 return !(__x < __y); 1660} 1661 1662template <class _Iter1, class _Iter2> 1663inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1664bool 1665operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1666{ 1667 return !(__y < __x); 1668} 1669 1670template <class _Iter1> 1671inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1672bool 1673operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1674{ 1675 return !(__x == __y); 1676} 1677 1678template <class _Iter1> 1679inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1680bool 1681operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1682{ 1683 return __y < __x; 1684} 1685 1686template <class _Iter1> 1687inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1688bool 1689operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1690{ 1691 return !(__x < __y); 1692} 1693 1694template <class _Iter1> 1695inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1696bool 1697operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1698{ 1699 return !(__y < __x); 1700} 1701 1702#ifndef _LIBCPP_CXX03_LANG 1703template <class _Iter1, class _Iter2> 1704inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1705auto 1706operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1707-> decltype(__x.base() - __y.base()) 1708{ 1709#if _LIBCPP_DEBUG_LEVEL == 2 1710 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1711 "Attempted to subtract incompatible iterators"); 1712#endif 1713 return __x.base() - __y.base(); 1714} 1715#else 1716template <class _Iter1, class _Iter2> 1717inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1718typename __wrap_iter<_Iter1>::difference_type 1719operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1720{ 1721#if _LIBCPP_DEBUG_LEVEL == 2 1722 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1723 "Attempted to subtract incompatible iterators"); 1724#endif 1725 return __x.base() - __y.base(); 1726} 1727#endif 1728 1729template <class _Iter> 1730inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1731__wrap_iter<_Iter> 1732operator+(typename __wrap_iter<_Iter>::difference_type __n, 1733 __wrap_iter<_Iter> __x) _NOEXCEPT 1734{ 1735 __x += __n; 1736 return __x; 1737} 1738 1739template <class _Tp, size_t _Np> 1740_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1741_Tp* 1742begin(_Tp (&__array)[_Np]) 1743{ 1744 return __array; 1745} 1746 1747template <class _Tp, size_t _Np> 1748_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1749_Tp* 1750end(_Tp (&__array)[_Np]) 1751{ 1752 return __array + _Np; 1753} 1754 1755#if !defined(_LIBCPP_CXX03_LANG) 1756 1757template <class _Cp> 1758_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1759auto 1760begin(_Cp& __c) -> decltype(__c.begin()) 1761{ 1762 return __c.begin(); 1763} 1764 1765template <class _Cp> 1766_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1767auto 1768begin(const _Cp& __c) -> decltype(__c.begin()) 1769{ 1770 return __c.begin(); 1771} 1772 1773template <class _Cp> 1774_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1775auto 1776end(_Cp& __c) -> decltype(__c.end()) 1777{ 1778 return __c.end(); 1779} 1780 1781template <class _Cp> 1782_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1783auto 1784end(const _Cp& __c) -> decltype(__c.end()) 1785{ 1786 return __c.end(); 1787} 1788 1789#if _LIBCPP_STD_VER > 11 1790 1791template <class _Tp, size_t _Np> 1792_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1793reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1794{ 1795 return reverse_iterator<_Tp*>(__array + _Np); 1796} 1797 1798template <class _Tp, size_t _Np> 1799_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1800reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1801{ 1802 return reverse_iterator<_Tp*>(__array); 1803} 1804 1805template <class _Ep> 1806_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1807reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1808{ 1809 return reverse_iterator<const _Ep*>(__il.end()); 1810} 1811 1812template <class _Ep> 1813_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1814reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1815{ 1816 return reverse_iterator<const _Ep*>(__il.begin()); 1817} 1818 1819template <class _Cp> 1820_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1821auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1822{ 1823 return _VSTD::begin(__c); 1824} 1825 1826template <class _Cp> 1827_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1828auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1829{ 1830 return _VSTD::end(__c); 1831} 1832 1833template <class _Cp> 1834_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1835auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1836{ 1837 return __c.rbegin(); 1838} 1839 1840template <class _Cp> 1841_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1842auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1843{ 1844 return __c.rbegin(); 1845} 1846 1847template <class _Cp> 1848_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1849auto rend(_Cp& __c) -> decltype(__c.rend()) 1850{ 1851 return __c.rend(); 1852} 1853 1854template <class _Cp> 1855_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1856auto rend(const _Cp& __c) -> decltype(__c.rend()) 1857{ 1858 return __c.rend(); 1859} 1860 1861template <class _Cp> 1862_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1863auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1864{ 1865 return _VSTD::rbegin(__c); 1866} 1867 1868template <class _Cp> 1869_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1870auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1871{ 1872 return _VSTD::rend(__c); 1873} 1874 1875#endif 1876 1877 1878#else // defined(_LIBCPP_CXX03_LANG) 1879 1880template <class _Cp> 1881_LIBCPP_INLINE_VISIBILITY 1882typename _Cp::iterator 1883begin(_Cp& __c) 1884{ 1885 return __c.begin(); 1886} 1887 1888template <class _Cp> 1889_LIBCPP_INLINE_VISIBILITY 1890typename _Cp::const_iterator 1891begin(const _Cp& __c) 1892{ 1893 return __c.begin(); 1894} 1895 1896template <class _Cp> 1897_LIBCPP_INLINE_VISIBILITY 1898typename _Cp::iterator 1899end(_Cp& __c) 1900{ 1901 return __c.end(); 1902} 1903 1904template <class _Cp> 1905_LIBCPP_INLINE_VISIBILITY 1906typename _Cp::const_iterator 1907end(const _Cp& __c) 1908{ 1909 return __c.end(); 1910} 1911 1912#endif // !defined(_LIBCPP_CXX03_LANG) 1913 1914#if _LIBCPP_STD_VER > 14 1915 1916// #if _LIBCPP_STD_VER > 11 1917// template <> 1918// struct _LIBCPP_TEMPLATE_VIS plus<void> 1919// { 1920// template <class _T1, class _T2> 1921// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1922// auto operator()(_T1&& __t, _T2&& __u) const 1923// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1924// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1925// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1926// typedef void is_transparent; 1927// }; 1928// #endif 1929 1930template <class _Cont> 1931_LIBCPP_INLINE_VISIBILITY 1932constexpr auto size(const _Cont& __c) 1933_NOEXCEPT_(noexcept(__c.size())) 1934-> decltype (__c.size()) 1935{ return __c.size(); } 1936 1937template <class _Tp, size_t _Sz> 1938_LIBCPP_INLINE_VISIBILITY 1939constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1940 1941#if _LIBCPP_STD_VER > 17 1942template <class _Cont> 1943_LIBCPP_INLINE_VISIBILITY 1944constexpr auto ssize(const _Cont& __c) 1945_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1946-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1947{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1948 1949template <class _Tp, ptrdiff_t _Sz> 1950_LIBCPP_INLINE_VISIBILITY 1951constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1952#endif 1953 1954template <class _Cont> 1955_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1956constexpr auto empty(const _Cont& __c) 1957_NOEXCEPT_(noexcept(__c.empty())) 1958-> decltype (__c.empty()) 1959{ return __c.empty(); } 1960 1961template <class _Tp, size_t _Sz> 1962_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1963constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1964 1965template <class _Ep> 1966_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1967constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1968 1969template <class _Cont> constexpr 1970_LIBCPP_INLINE_VISIBILITY 1971auto data(_Cont& __c) 1972_NOEXCEPT_(noexcept(__c.data())) 1973-> decltype (__c.data()) 1974{ return __c.data(); } 1975 1976template <class _Cont> constexpr 1977_LIBCPP_INLINE_VISIBILITY 1978auto data(const _Cont& __c) 1979_NOEXCEPT_(noexcept(__c.data())) 1980-> decltype (__c.data()) 1981{ return __c.data(); } 1982 1983template <class _Tp, size_t _Sz> 1984_LIBCPP_INLINE_VISIBILITY 1985constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1986 1987template <class _Ep> 1988_LIBCPP_INLINE_VISIBILITY 1989constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1990#endif 1991 1992template <class _Container, class _Predicate> 1993typename _Container::size_type 1994__libcpp_erase_if_container(_Container& __c, _Predicate& __pred) { 1995 typename _Container::size_type __old_size = __c.size(); 1996 1997 const typename _Container::iterator __last = __c.end(); 1998 for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) { 1999 if (__pred(*__iter)) 2000 __iter = __c.erase(__iter); 2001 else 2002 ++__iter; 2003 } 2004 2005 return __old_size - __c.size(); 2006} 2007 2008_LIBCPP_END_NAMESPACE_STD 2009 2010#endif // _LIBCPP_ITERATOR 2011