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 51// [iterator.concept.writable], concept indirectly_writable 52template<class Out, class T> 53 concept indirectly_writable = see below; // since C++20 54 55// [iterator.concept.winc], concept weakly_incrementable 56template<class I> 57 concept weakly_incrementable = see below; // since C++20 58 59// [iterator.concept.inc], concept incrementable 60template<class I> 61 concept incrementable = see below; // since C++20 62 63// [iterator.concept.iterator], concept input_or_output_iterator 64 template<class I> 65 concept input_or_output_iterator = see below; // since C++20 66 67// [iterator.concept.sentinel], concept sentinel_for 68template<class S, class I> 69 concept sentinel_for = see below; // since C++20 70 71// [iterator.concept.sizedsentinel], concept sized_sentinel_for 72template<class S, class I> 73 inline constexpr bool disable_sized_sentinel_for = false; 74 75template<class S, class I> 76 concept sized_sentinel_for = see below; 77 78template<class Category, class T, class Distance = ptrdiff_t, 79 class Pointer = T*, class Reference = T&> 80struct iterator 81{ 82 typedef T value_type; 83 typedef Distance difference_type; 84 typedef Pointer pointer; 85 typedef Reference reference; 86 typedef Category iterator_category; 87}; 88 89struct input_iterator_tag {}; 90struct output_iterator_tag {}; 91struct forward_iterator_tag : public input_iterator_tag {}; 92struct bidirectional_iterator_tag : public forward_iterator_tag {}; 93struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 94 95// 27.4.3, iterator operations 96template <class InputIterator, class Distance> // constexpr in C++17 97 constexpr void advance(InputIterator& i, Distance n); 98 99template <class InputIterator> // constexpr in C++17 100 constexpr typename iterator_traits<InputIterator>::difference_type 101 distance(InputIterator first, InputIterator last); 102 103template <class InputIterator> // constexpr in C++17 104 constexpr InputIterator next(InputIterator x, 105typename iterator_traits<InputIterator>::difference_type n = 1); 106 107template <class BidirectionalIterator> // constexpr in C++17 108 constexpr BidirectionalIterator prev(BidirectionalIterator x, 109 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 110 111template <class Iterator> 112class reverse_iterator 113 : public iterator<typename iterator_traits<Iterator>::iterator_category, 114 typename iterator_traits<Iterator>::value_type, 115 typename iterator_traits<Iterator>::difference_type, 116 typename iterator_traits<Iterator>::pointer, 117 typename iterator_traits<Iterator>::reference> 118{ 119protected: 120 Iterator current; 121public: 122 typedef Iterator iterator_type; 123 typedef typename iterator_traits<Iterator>::difference_type difference_type; 124 typedef typename iterator_traits<Iterator>::reference reference; 125 typedef typename iterator_traits<Iterator>::pointer pointer; 126 127 constexpr reverse_iterator(); 128 constexpr explicit reverse_iterator(Iterator x); 129 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 130 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 131 constexpr Iterator base() const; 132 constexpr reference operator*() const; 133 constexpr pointer operator->() const; 134 constexpr reverse_iterator& operator++(); 135 constexpr reverse_iterator operator++(int); 136 constexpr reverse_iterator& operator--(); 137 constexpr reverse_iterator operator--(int); 138 constexpr reverse_iterator operator+ (difference_type n) const; 139 constexpr reverse_iterator& operator+=(difference_type n); 140 constexpr reverse_iterator operator- (difference_type n) const; 141 constexpr reverse_iterator& operator-=(difference_type n); 142 constexpr reference operator[](difference_type n) const; 143}; 144 145template <class Iterator1, class Iterator2> 146constexpr bool // constexpr in C++17 147operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 148 149template <class Iterator1, class Iterator2> 150constexpr bool // constexpr in C++17 151operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 152 153template <class Iterator1, class Iterator2> 154constexpr bool // constexpr in C++17 155operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 156 157template <class Iterator1, class Iterator2> 158constexpr bool // constexpr in C++17 159operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 160 161template <class Iterator1, class Iterator2> 162constexpr bool // constexpr in C++17 163operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 164 165template <class Iterator1, class Iterator2> 166constexpr bool // constexpr in C++17 167operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 168 169template <class Iterator1, class Iterator2> 170constexpr auto 171operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 172-> decltype(__y.base() - __x.base()); // constexpr in C++17 173 174template <class Iterator> 175constexpr reverse_iterator<Iterator> 176operator+(typename reverse_iterator<Iterator>::difference_type n, 177 const reverse_iterator<Iterator>& x); // constexpr in C++17 178 179template <class Iterator> 180constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 181 182template <class Container> 183class back_insert_iterator 184{ 185protected: 186 Container* container; 187public: 188 typedef Container container_type; 189 typedef void value_type; 190 typedef void difference_type; 191 typedef void reference; 192 typedef void pointer; 193 194 explicit back_insert_iterator(Container& x); // constexpr in C++20 195 back_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 196 back_insert_iterator& operator*(); // constexpr in C++20 197 back_insert_iterator& operator++(); // constexpr in C++20 198 back_insert_iterator operator++(int); // constexpr in C++20 199}; 200 201template <class Container> back_insert_iterator<Container> back_inserter(Container& x); // constexpr in C++20 202 203template <class Container> 204class front_insert_iterator 205{ 206protected: 207 Container* container; 208public: 209 typedef Container container_type; 210 typedef void value_type; 211 typedef void difference_type; 212 typedef void reference; 213 typedef void pointer; 214 215 explicit front_insert_iterator(Container& x); // constexpr in C++20 216 front_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 217 front_insert_iterator& operator*(); // constexpr in C++20 218 front_insert_iterator& operator++(); // constexpr in C++20 219 front_insert_iterator operator++(int); // constexpr in C++20 220}; 221 222template <class Container> front_insert_iterator<Container> front_inserter(Container& x); // constexpr in C++20 223 224template <class Container> 225class insert_iterator 226{ 227protected: 228 Container* container; 229 typename Container::iterator iter; 230public: 231 typedef Container container_type; 232 typedef void value_type; 233 typedef void difference_type; 234 typedef void reference; 235 typedef void pointer; 236 237 insert_iterator(Container& x, typename Container::iterator i); // constexpr in C++20 238 insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 239 insert_iterator& operator*(); // constexpr in C++20 240 insert_iterator& operator++(); // constexpr in C++20 241 insert_iterator& operator++(int); // constexpr in C++20 242}; 243 244template <class Container, class Iterator> 245insert_iterator<Container> inserter(Container& x, Iterator i); // constexpr in C++20 246 247template <class Iterator> 248class move_iterator { 249public: 250 typedef Iterator iterator_type; 251 typedef typename iterator_traits<Iterator>::difference_type difference_type; 252 typedef Iterator pointer; 253 typedef typename iterator_traits<Iterator>::value_type value_type; 254 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 255 typedef value_type&& reference; 256 257 constexpr move_iterator(); // all the constexprs are in C++17 258 constexpr explicit move_iterator(Iterator i); 259 template <class U> 260 constexpr move_iterator(const move_iterator<U>& u); 261 template <class U> 262 constexpr move_iterator& operator=(const move_iterator<U>& u); 263 constexpr iterator_type base() const; 264 constexpr reference operator*() const; 265 constexpr pointer operator->() const; 266 constexpr move_iterator& operator++(); 267 constexpr move_iterator operator++(int); 268 constexpr move_iterator& operator--(); 269 constexpr move_iterator operator--(int); 270 constexpr move_iterator operator+(difference_type n) const; 271 constexpr move_iterator& operator+=(difference_type n); 272 constexpr move_iterator operator-(difference_type n) const; 273 constexpr move_iterator& operator-=(difference_type n); 274 constexpr unspecified operator[](difference_type n) const; 275private: 276 Iterator current; // exposition only 277}; 278 279template <class Iterator1, class Iterator2> 280constexpr bool // constexpr in C++17 281operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 282 283template <class Iterator1, class Iterator2> 284constexpr bool // constexpr in C++17 285operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 286 287template <class Iterator1, class Iterator2> 288constexpr bool // constexpr in C++17 289operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 290 291template <class Iterator1, class Iterator2> 292constexpr bool // constexpr in C++17 293operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 294 295template <class Iterator1, class Iterator2> 296constexpr bool // constexpr in C++17 297operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 298 299template <class Iterator1, class Iterator2> 300constexpr bool // constexpr in C++17 301operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 302 303template <class Iterator1, class Iterator2> 304constexpr auto // constexpr in C++17 305operator-(const move_iterator<Iterator1>& x, 306 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 307 308template <class Iterator> 309constexpr move_iterator<Iterator> operator+( // constexpr in C++17 310 typename move_iterator<Iterator>::difference_type n, 311 const move_iterator<Iterator>& x); 312 313template <class Iterator> // constexpr in C++17 314constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 315 316 317template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 318class istream_iterator 319 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> 320{ 321public: 322 typedef charT char_type; 323 typedef traits traits_type; 324 typedef basic_istream<charT,traits> istream_type; 325 326 constexpr istream_iterator(); 327 istream_iterator(istream_type& s); 328 istream_iterator(const istream_iterator& x); 329 ~istream_iterator(); 330 331 const T& operator*() const; 332 const T* operator->() const; 333 istream_iterator& operator++(); 334 istream_iterator operator++(int); 335}; 336 337template <class T, class charT, class traits, class Distance> 338bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 339 const istream_iterator<T,charT,traits,Distance>& y); 340template <class T, class charT, class traits, class Distance> 341bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 342 const istream_iterator<T,charT,traits,Distance>& y); 343 344template <class T, class charT = char, class traits = char_traits<charT> > 345class ostream_iterator 346 : public iterator<output_iterator_tag, void, void, void ,void> 347{ 348public: 349 typedef charT char_type; 350 typedef traits traits_type; 351 typedef basic_ostream<charT,traits> ostream_type; 352 353 ostream_iterator(ostream_type& s); 354 ostream_iterator(ostream_type& s, const charT* delimiter); 355 ostream_iterator(const ostream_iterator& x); 356 ~ostream_iterator(); 357 ostream_iterator& operator=(const T& value); 358 359 ostream_iterator& operator*(); 360 ostream_iterator& operator++(); 361 ostream_iterator& operator++(int); 362}; 363 364template<class charT, class traits = char_traits<charT> > 365class istreambuf_iterator 366 : public iterator<input_iterator_tag, charT, 367 typename traits::off_type, unspecified, 368 charT> 369{ 370public: 371 typedef charT char_type; 372 typedef traits traits_type; 373 typedef typename traits::int_type int_type; 374 typedef basic_streambuf<charT,traits> streambuf_type; 375 typedef basic_istream<charT,traits> istream_type; 376 377 istreambuf_iterator() noexcept; 378 istreambuf_iterator(istream_type& s) noexcept; 379 istreambuf_iterator(streambuf_type* s) noexcept; 380 istreambuf_iterator(a-private-type) noexcept; 381 382 charT operator*() const; 383 pointer operator->() const; 384 istreambuf_iterator& operator++(); 385 a-private-type operator++(int); 386 387 bool equal(const istreambuf_iterator& b) const; 388}; 389 390template <class charT, class traits> 391bool operator==(const istreambuf_iterator<charT,traits>& a, 392 const istreambuf_iterator<charT,traits>& b); 393template <class charT, class traits> 394bool operator!=(const istreambuf_iterator<charT,traits>& a, 395 const istreambuf_iterator<charT,traits>& b); 396 397template <class charT, class traits = char_traits<charT> > 398class ostreambuf_iterator 399 : public iterator<output_iterator_tag, void, void, void, void> 400{ 401public: 402 typedef charT char_type; 403 typedef traits traits_type; 404 typedef basic_streambuf<charT,traits> streambuf_type; 405 typedef basic_ostream<charT,traits> ostream_type; 406 407 ostreambuf_iterator(ostream_type& s) noexcept; 408 ostreambuf_iterator(streambuf_type* s) noexcept; 409 ostreambuf_iterator& operator=(charT c); 410 ostreambuf_iterator& operator*(); 411 ostreambuf_iterator& operator++(); 412 ostreambuf_iterator& operator++(int); 413 bool failed() const noexcept; 414}; 415 416template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 417template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 418template <class C> constexpr auto end(C& c) -> decltype(c.end()); 419template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 420template <class T, size_t N> constexpr T* begin(T (&array)[N]); 421template <class T, size_t N> constexpr T* end(T (&array)[N]); 422 423template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 424template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 425template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 426template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 427template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 428template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 429template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 430template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 431template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 432template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 433template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 434template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 435 436// 24.8, container access: 437template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 438template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 439 440template <class C> constexpr auto ssize(const C& c) 441 -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 442template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 443 444template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 445template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 446template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 447template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 448template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 449template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 450template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 451 452} // std 453 454*/ 455 456#include <__config> 457#include <iosfwd> // for forward declarations of vector and string. 458#include <__functional_base> 459#include <type_traits> 460#include <compare> 461#include <concepts> // Mandated by the Standard. 462#include <cstddef> 463#include <initializer_list> 464#include <__iterator/concepts.h> 465#include <__iterator/incrementable_traits.h> 466#include <__iterator/iter_move.h> 467#include <__iterator/iterator_traits.h> 468#include <__iterator/readable_traits.h> 469#include <__iterator/concepts.h> 470#include <__memory/addressof.h> 471#include <__memory/pointer_traits.h> 472#include <version> 473 474#include <__debug> 475 476#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 477#pragma GCC system_header 478#endif 479 480_LIBCPP_BEGIN_NAMESPACE_STD 481 482template<class _Category, class _Tp, class _Distance = ptrdiff_t, 483 class _Pointer = _Tp*, class _Reference = _Tp&> 484struct _LIBCPP_TEMPLATE_VIS iterator 485{ 486 typedef _Tp value_type; 487 typedef _Distance difference_type; 488 typedef _Pointer pointer; 489 typedef _Reference reference; 490 typedef _Category iterator_category; 491}; 492 493template <class _InputIter> 494inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 495void __advance(_InputIter& __i, 496 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 497{ 498 for (; __n > 0; --__n) 499 ++__i; 500} 501 502template <class _BiDirIter> 503inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 504void __advance(_BiDirIter& __i, 505 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 506{ 507 if (__n >= 0) 508 for (; __n > 0; --__n) 509 ++__i; 510 else 511 for (; __n < 0; ++__n) 512 --__i; 513} 514 515template <class _RandIter> 516inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 517void __advance(_RandIter& __i, 518 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 519{ 520 __i += __n; 521} 522 523template <class _InputIter, class _Distance> 524inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 525void advance(_InputIter& __i, _Distance __orig_n) 526{ 527 _LIBCPP_ASSERT(__orig_n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 528 "Attempt to advance(it, n) with negative n on a non-bidirectional iterator"); 529 typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; 530 _IntegralSize __n = __orig_n; 531 _VSTD::__advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 532} 533 534template <class _InputIter> 535inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 536typename iterator_traits<_InputIter>::difference_type 537__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 538{ 539 typename iterator_traits<_InputIter>::difference_type __r(0); 540 for (; __first != __last; ++__first) 541 ++__r; 542 return __r; 543} 544 545template <class _RandIter> 546inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 547typename iterator_traits<_RandIter>::difference_type 548__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 549{ 550 return __last - __first; 551} 552 553template <class _InputIter> 554inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 555typename iterator_traits<_InputIter>::difference_type 556distance(_InputIter __first, _InputIter __last) 557{ 558 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 559} 560 561template <class _InputIter> 562inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 563typename enable_if 564< 565 __is_cpp17_input_iterator<_InputIter>::value, 566 _InputIter 567>::type 568next(_InputIter __x, 569 typename iterator_traits<_InputIter>::difference_type __n = 1) 570{ 571 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 572 "Attempt to next(it, n) with negative n on a non-bidirectional iterator"); 573 574 _VSTD::advance(__x, __n); 575 return __x; 576} 577 578template <class _InputIter> 579inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 580typename enable_if 581< 582 __is_cpp17_input_iterator<_InputIter>::value, 583 _InputIter 584>::type 585prev(_InputIter __x, 586 typename iterator_traits<_InputIter>::difference_type __n = 1) 587{ 588 _LIBCPP_ASSERT(__n <= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 589 "Attempt to prev(it, n) with a positive n on a non-bidirectional iterator"); 590 _VSTD::advance(__x, -__n); 591 return __x; 592} 593 594 595template <class _Tp, class = void> 596struct __is_stashing_iterator : false_type {}; 597 598template <class _Tp> 599struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 600 : true_type {}; 601 602template <class _Iter> 603class _LIBCPP_TEMPLATE_VIS reverse_iterator 604 : public iterator<typename iterator_traits<_Iter>::iterator_category, 605 typename iterator_traits<_Iter>::value_type, 606 typename iterator_traits<_Iter>::difference_type, 607 typename iterator_traits<_Iter>::pointer, 608 typename iterator_traits<_Iter>::reference> 609{ 610private: 611 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 612 613 static_assert(!__is_stashing_iterator<_Iter>::value, 614 "The specified iterator type cannot be used with reverse_iterator; " 615 "Using stashing iterators with reverse_iterator causes undefined behavior"); 616 617protected: 618 _Iter current; 619public: 620 typedef _Iter iterator_type; 621 typedef typename iterator_traits<_Iter>::difference_type difference_type; 622 typedef typename iterator_traits<_Iter>::reference reference; 623 typedef typename iterator_traits<_Iter>::pointer pointer; 624 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 625 random_access_iterator_tag, 626 typename iterator_traits<_Iter>::iterator_category> iterator_category; 627#if _LIBCPP_STD_VER > 17 628 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 629 random_access_iterator_tag, 630 bidirectional_iterator_tag> iterator_concept; 631#endif 632 633 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 634 reverse_iterator() : __t(), current() {} 635 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 636 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 637 template <class _Up> 638 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 639 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 640 template <class _Up> 641 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 642 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 643 { __t = current = __u.base(); return *this; } 644 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 645 _Iter base() const {return current;} 646 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 647 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 648 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 649 pointer operator->() const {return _VSTD::addressof(operator*());} 650 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 651 reverse_iterator& operator++() {--current; return *this;} 652 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 653 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 654 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 655 reverse_iterator& operator--() {++current; return *this;} 656 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 657 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 658 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 659 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 660 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 661 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 662 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 663 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 664 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 665 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 666 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 667 reference operator[](difference_type __n) const {return *(*this + __n);} 668}; 669 670template <class _Iter1, class _Iter2> 671inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 672bool 673operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 674{ 675 return __x.base() == __y.base(); 676} 677 678template <class _Iter1, class _Iter2> 679inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 680bool 681operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 682{ 683 return __x.base() > __y.base(); 684} 685 686template <class _Iter1, class _Iter2> 687inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 688bool 689operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 690{ 691 return __x.base() != __y.base(); 692} 693 694template <class _Iter1, class _Iter2> 695inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 696bool 697operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 698{ 699 return __x.base() < __y.base(); 700} 701 702template <class _Iter1, class _Iter2> 703inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 704bool 705operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 706{ 707 return __x.base() <= __y.base(); 708} 709 710template <class _Iter1, class _Iter2> 711inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 712bool 713operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 714{ 715 return __x.base() >= __y.base(); 716} 717 718#ifndef _LIBCPP_CXX03_LANG 719template <class _Iter1, class _Iter2> 720inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 721auto 722operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 723-> decltype(__y.base() - __x.base()) 724{ 725 return __y.base() - __x.base(); 726} 727#else 728template <class _Iter1, class _Iter2> 729inline _LIBCPP_INLINE_VISIBILITY 730typename reverse_iterator<_Iter1>::difference_type 731operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 732{ 733 return __y.base() - __x.base(); 734} 735#endif 736 737template <class _Iter> 738inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 739reverse_iterator<_Iter> 740operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 741{ 742 return reverse_iterator<_Iter>(__x.base() - __n); 743} 744 745#if _LIBCPP_STD_VER > 11 746template <class _Iter> 747inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 748reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 749{ 750 return reverse_iterator<_Iter>(__i); 751} 752#endif 753 754template <class _Container> 755class _LIBCPP_TEMPLATE_VIS back_insert_iterator 756 : public iterator<output_iterator_tag, 757 void, 758 void, 759 void, 760 void> 761{ 762protected: 763 _Container* container; 764public: 765 typedef _Container container_type; 766 767 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 768 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_) 769 {container->push_back(__value_); return *this;} 770#ifndef _LIBCPP_CXX03_LANG 771 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_) 772 {container->push_back(_VSTD::move(__value_)); return *this;} 773#endif // _LIBCPP_CXX03_LANG 774 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator*() {return *this;} 775 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator++() {return *this;} 776 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator operator++(int) {return *this;} 777}; 778 779template <class _Container> 780inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 781back_insert_iterator<_Container> 782back_inserter(_Container& __x) 783{ 784 return back_insert_iterator<_Container>(__x); 785} 786 787template <class _Container> 788class _LIBCPP_TEMPLATE_VIS front_insert_iterator 789 : public iterator<output_iterator_tag, 790 void, 791 void, 792 void, 793 void> 794{ 795protected: 796 _Container* container; 797public: 798 typedef _Container container_type; 799 800 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 801 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) 802 {container->push_front(__value_); return *this;} 803#ifndef _LIBCPP_CXX03_LANG 804 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) 805 {container->push_front(_VSTD::move(__value_)); return *this;} 806#endif // _LIBCPP_CXX03_LANG 807 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator*() {return *this;} 808 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator++() {return *this;} 809 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator operator++(int) {return *this;} 810}; 811 812template <class _Container> 813inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 814front_insert_iterator<_Container> 815front_inserter(_Container& __x) 816{ 817 return front_insert_iterator<_Container>(__x); 818} 819 820template <class _Container> 821class _LIBCPP_TEMPLATE_VIS insert_iterator 822 : public iterator<output_iterator_tag, 823 void, 824 void, 825 void, 826 void> 827{ 828protected: 829 _Container* container; 830 typename _Container::iterator iter; 831public: 832 typedef _Container container_type; 833 834 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, typename _Container::iterator __i) 835 : container(_VSTD::addressof(__x)), iter(__i) {} 836 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(const typename _Container::value_type& __value_) 837 {iter = container->insert(iter, __value_); ++iter; return *this;} 838#ifndef _LIBCPP_CXX03_LANG 839 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(typename _Container::value_type&& __value_) 840 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 841#endif // _LIBCPP_CXX03_LANG 842 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator*() {return *this;} 843 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++() {return *this;} 844 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int) {return *this;} 845}; 846 847template <class _Container> 848inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 849insert_iterator<_Container> 850inserter(_Container& __x, typename _Container::iterator __i) 851{ 852 return insert_iterator<_Container>(__x, __i); 853} 854 855template <class _Tp, class _CharT = char, 856 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 857class _LIBCPP_TEMPLATE_VIS istream_iterator 858 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 859{ 860public: 861 typedef _CharT char_type; 862 typedef _Traits traits_type; 863 typedef basic_istream<_CharT,_Traits> istream_type; 864private: 865 istream_type* __in_stream_; 866 _Tp __value_; 867public: 868 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 869 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 870 { 871 if (!(*__in_stream_ >> __value_)) 872 __in_stream_ = nullptr; 873 } 874 875 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 876 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 877 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 878 { 879 if (!(*__in_stream_ >> __value_)) 880 __in_stream_ = nullptr; 881 return *this; 882 } 883 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 884 {istream_iterator __t(*this); ++(*this); return __t;} 885 886 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 887 friend _LIBCPP_INLINE_VISIBILITY 888 bool 889 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 890 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 891 892 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 893 friend _LIBCPP_INLINE_VISIBILITY 894 bool 895 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 896 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 897}; 898 899template <class _Tp, class _CharT, class _Traits, class _Distance> 900inline _LIBCPP_INLINE_VISIBILITY 901bool 902operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 903 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 904{ 905 return __x.__in_stream_ == __y.__in_stream_; 906} 907 908template <class _Tp, class _CharT, class _Traits, class _Distance> 909inline _LIBCPP_INLINE_VISIBILITY 910bool 911operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 912 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 913{ 914 return !(__x == __y); 915} 916 917template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 918class _LIBCPP_TEMPLATE_VIS ostream_iterator 919 : public iterator<output_iterator_tag, void, void, void, void> 920{ 921public: 922 typedef output_iterator_tag iterator_category; 923 typedef void value_type; 924#if _LIBCPP_STD_VER > 17 925 typedef std::ptrdiff_t difference_type; 926#else 927 typedef void difference_type; 928#endif 929 typedef void pointer; 930 typedef void reference; 931 typedef _CharT char_type; 932 typedef _Traits traits_type; 933 typedef basic_ostream<_CharT, _Traits> ostream_type; 934 935private: 936 ostream_type* __out_stream_; 937 const char_type* __delim_; 938public: 939 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 940 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 941 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 942 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 943 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 944 { 945 *__out_stream_ << __value_; 946 if (__delim_) 947 *__out_stream_ << __delim_; 948 return *this; 949 } 950 951 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 952 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 953 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 954}; 955 956template<class _CharT, class _Traits> 957class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 958 : public iterator<input_iterator_tag, _CharT, 959 typename _Traits::off_type, _CharT*, 960 _CharT> 961{ 962public: 963 typedef _CharT char_type; 964 typedef _Traits traits_type; 965 typedef typename _Traits::int_type int_type; 966 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 967 typedef basic_istream<_CharT,_Traits> istream_type; 968private: 969 mutable streambuf_type* __sbuf_; 970 971 class __proxy 972 { 973 char_type __keep_; 974 streambuf_type* __sbuf_; 975 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 976 : __keep_(__c), __sbuf_(__s) {} 977 friend class istreambuf_iterator; 978 public: 979 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 980 }; 981 982 _LIBCPP_INLINE_VISIBILITY 983 bool __test_for_eof() const 984 { 985 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 986 __sbuf_ = nullptr; 987 return __sbuf_ == nullptr; 988 } 989public: 990 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 991 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 992 : __sbuf_(__s.rdbuf()) {} 993 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 994 : __sbuf_(__s) {} 995 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 996 : __sbuf_(__p.__sbuf_) {} 997 998 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 999 {return static_cast<char_type>(__sbuf_->sgetc());} 1000 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1001 { 1002 __sbuf_->sbumpc(); 1003 return *this; 1004 } 1005 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1006 { 1007 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1008 } 1009 1010 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1011 {return __test_for_eof() == __b.__test_for_eof();} 1012}; 1013 1014template <class _CharT, class _Traits> 1015inline _LIBCPP_INLINE_VISIBILITY 1016bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1017 const istreambuf_iterator<_CharT,_Traits>& __b) 1018 {return __a.equal(__b);} 1019 1020template <class _CharT, class _Traits> 1021inline _LIBCPP_INLINE_VISIBILITY 1022bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1023 const istreambuf_iterator<_CharT,_Traits>& __b) 1024 {return !__a.equal(__b);} 1025 1026template <class _CharT, class _Traits> 1027class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1028 : public iterator<output_iterator_tag, void, void, void, void> 1029{ 1030public: 1031 typedef output_iterator_tag iterator_category; 1032 typedef void value_type; 1033#if _LIBCPP_STD_VER > 17 1034 typedef std::ptrdiff_t difference_type; 1035#else 1036 typedef void difference_type; 1037#endif 1038 typedef void pointer; 1039 typedef void reference; 1040 typedef _CharT char_type; 1041 typedef _Traits traits_type; 1042 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1043 typedef basic_ostream<_CharT, _Traits> ostream_type; 1044 1045private: 1046 streambuf_type* __sbuf_; 1047public: 1048 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1049 : __sbuf_(__s.rdbuf()) {} 1050 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1051 : __sbuf_(__s) {} 1052 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1053 { 1054 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1055 __sbuf_ = nullptr; 1056 return *this; 1057 } 1058 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1059 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1060 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1061 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1062 1063 template <class _Ch, class _Tr> 1064 friend 1065 _LIBCPP_HIDDEN 1066 ostreambuf_iterator<_Ch, _Tr> 1067 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1068 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1069 ios_base& __iob, _Ch __fl); 1070}; 1071 1072template <class _Iter> 1073class _LIBCPP_TEMPLATE_VIS move_iterator 1074{ 1075private: 1076 _Iter __i; 1077public: 1078 typedef _Iter iterator_type; 1079 typedef typename iterator_traits<iterator_type>::value_type value_type; 1080 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1081 typedef iterator_type pointer; 1082 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 1083 random_access_iterator_tag, 1084 typename iterator_traits<_Iter>::iterator_category> iterator_category; 1085#if _LIBCPP_STD_VER > 17 1086 typedef input_iterator_tag iterator_concept; 1087#endif 1088 1089#ifndef _LIBCPP_CXX03_LANG 1090 typedef typename iterator_traits<iterator_type>::reference __reference; 1091 typedef typename conditional< 1092 is_reference<__reference>::value, 1093 typename remove_reference<__reference>::type&&, 1094 __reference 1095 >::type reference; 1096#else 1097 typedef typename iterator_traits<iterator_type>::reference reference; 1098#endif 1099 1100 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1101 move_iterator() : __i() {} 1102 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1103 explicit move_iterator(_Iter __x) : __i(__x) {} 1104 template <class _Up> 1105 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1106 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1107 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1108 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1109 reference operator*() const { return static_cast<reference>(*__i); } 1110 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1111 pointer operator->() const { return __i;} 1112 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1113 move_iterator& operator++() {++__i; return *this;} 1114 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1115 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1116 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1117 move_iterator& operator--() {--__i; return *this;} 1118 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1119 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1120 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1121 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1122 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1123 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1124 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1125 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1126 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1127 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1128 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1129 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1130}; 1131 1132template <class _Iter1, class _Iter2> 1133inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1134bool 1135operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1136{ 1137 return __x.base() == __y.base(); 1138} 1139 1140template <class _Iter1, class _Iter2> 1141inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1142bool 1143operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1144{ 1145 return __x.base() < __y.base(); 1146} 1147 1148template <class _Iter1, class _Iter2> 1149inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1150bool 1151operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1152{ 1153 return __x.base() != __y.base(); 1154} 1155 1156template <class _Iter1, class _Iter2> 1157inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1158bool 1159operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1160{ 1161 return __x.base() > __y.base(); 1162} 1163 1164template <class _Iter1, class _Iter2> 1165inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1166bool 1167operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1168{ 1169 return __x.base() >= __y.base(); 1170} 1171 1172template <class _Iter1, class _Iter2> 1173inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1174bool 1175operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1176{ 1177 return __x.base() <= __y.base(); 1178} 1179 1180#ifndef _LIBCPP_CXX03_LANG 1181template <class _Iter1, class _Iter2> 1182inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1183auto 1184operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1185-> decltype(__x.base() - __y.base()) 1186{ 1187 return __x.base() - __y.base(); 1188} 1189#else 1190template <class _Iter1, class _Iter2> 1191inline _LIBCPP_INLINE_VISIBILITY 1192typename move_iterator<_Iter1>::difference_type 1193operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1194{ 1195 return __x.base() - __y.base(); 1196} 1197#endif 1198 1199template <class _Iter> 1200inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1201move_iterator<_Iter> 1202operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1203{ 1204 return move_iterator<_Iter>(__x.base() + __n); 1205} 1206 1207template <class _Iter> 1208inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1209move_iterator<_Iter> 1210make_move_iterator(_Iter __i) 1211{ 1212 return move_iterator<_Iter>(__i); 1213} 1214 1215// __wrap_iter 1216 1217template <class _Iter> class __wrap_iter; 1218 1219template <class _Iter1, class _Iter2> 1220_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1221bool 1222operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1223 1224template <class _Iter1, class _Iter2> 1225_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1226bool 1227operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1228 1229template <class _Iter1, class _Iter2> 1230_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1231bool 1232operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1233 1234template <class _Iter1, class _Iter2> 1235_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1236bool 1237operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1238 1239template <class _Iter1, class _Iter2> 1240_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1241bool 1242operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1243 1244template <class _Iter1, class _Iter2> 1245_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1246bool 1247operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1248 1249#ifndef _LIBCPP_CXX03_LANG 1250template <class _Iter1, class _Iter2> 1251_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1252auto 1253operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1254-> decltype(__x.base() - __y.base()); 1255#else 1256template <class _Iter1, class _Iter2> 1257_LIBCPP_INLINE_VISIBILITY 1258typename __wrap_iter<_Iter1>::difference_type 1259operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1260#endif 1261 1262template <class _Iter> 1263_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1264__wrap_iter<_Iter> 1265operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1266 1267template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1268template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1269template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1270template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1271 1272template <class _Iter> 1273class __wrap_iter 1274{ 1275public: 1276 typedef _Iter iterator_type; 1277 typedef typename iterator_traits<iterator_type>::value_type value_type; 1278 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1279 typedef typename iterator_traits<iterator_type>::pointer pointer; 1280 typedef typename iterator_traits<iterator_type>::reference reference; 1281 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1282#if _LIBCPP_STD_VER > 17 1283 typedef _If<__is_cpp17_contiguous_iterator<_Iter>::value, 1284 contiguous_iterator_tag, iterator_category> iterator_concept; 1285#endif 1286 1287private: 1288 iterator_type __i; 1289public: 1290 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1291#if _LIBCPP_STD_VER > 11 1292 : __i{} 1293#endif 1294 { 1295#if _LIBCPP_DEBUG_LEVEL == 2 1296 __get_db()->__insert_i(this); 1297#endif 1298 } 1299 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1300 __wrap_iter(const __wrap_iter<_Up>& __u, 1301 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1302 : __i(__u.base()) 1303 { 1304#if _LIBCPP_DEBUG_LEVEL == 2 1305 __get_db()->__iterator_copy(this, &__u); 1306#endif 1307 } 1308#if _LIBCPP_DEBUG_LEVEL == 2 1309 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1310 __wrap_iter(const __wrap_iter& __x) 1311 : __i(__x.base()) 1312 { 1313 __get_db()->__iterator_copy(this, &__x); 1314 } 1315 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1316 __wrap_iter& operator=(const __wrap_iter& __x) 1317 { 1318 if (this != &__x) 1319 { 1320 __get_db()->__iterator_copy(this, &__x); 1321 __i = __x.__i; 1322 } 1323 return *this; 1324 } 1325 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1326 ~__wrap_iter() 1327 { 1328 __get_db()->__erase_i(this); 1329 } 1330#endif 1331 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1332 { 1333#if _LIBCPP_DEBUG_LEVEL == 2 1334 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1335 "Attempted to dereference a non-dereferenceable iterator"); 1336#endif 1337 return *__i; 1338 } 1339 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1340 { 1341#if _LIBCPP_DEBUG_LEVEL == 2 1342 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1343 "Attempted to dereference a non-dereferenceable iterator"); 1344#endif 1345 return (pointer)_VSTD::addressof(*__i); 1346 } 1347 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1348 { 1349#if _LIBCPP_DEBUG_LEVEL == 2 1350 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1351 "Attempted to increment non-incrementable iterator"); 1352#endif 1353 ++__i; 1354 return *this; 1355 } 1356 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1357 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1358 1359 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1360 { 1361#if _LIBCPP_DEBUG_LEVEL == 2 1362 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1363 "Attempted to decrement non-decrementable iterator"); 1364#endif 1365 --__i; 1366 return *this; 1367 } 1368 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1369 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1370 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1371 {__wrap_iter __w(*this); __w += __n; return __w;} 1372 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1373 { 1374#if _LIBCPP_DEBUG_LEVEL == 2 1375 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1376 "Attempted to add/subtract iterator outside of valid range"); 1377#endif 1378 __i += __n; 1379 return *this; 1380 } 1381 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1382 {return *this + (-__n);} 1383 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1384 {*this += -__n; return *this;} 1385 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1386 { 1387#if _LIBCPP_DEBUG_LEVEL == 2 1388 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1389 "Attempted to subscript iterator outside of valid range"); 1390#endif 1391 return __i[__n]; 1392 } 1393 1394 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1395 1396private: 1397#if _LIBCPP_DEBUG_LEVEL == 2 1398 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1399 { 1400 __get_db()->__insert_ic(this, __p); 1401 } 1402#else 1403 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1404#endif 1405 1406 template <class _Up> friend class __wrap_iter; 1407 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1408 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1409 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1410 1411 template <class _Iter1, class _Iter2> 1412 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1413 bool 1414 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1415 1416 template <class _Iter1, class _Iter2> 1417 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1418 bool 1419 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1420 1421 template <class _Iter1, class _Iter2> 1422 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1423 bool 1424 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1425 1426 template <class _Iter1, class _Iter2> 1427 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1428 bool 1429 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1430 1431 template <class _Iter1, class _Iter2> 1432 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1433 bool 1434 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1435 1436 template <class _Iter1, class _Iter2> 1437 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1438 bool 1439 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1440 1441#ifndef _LIBCPP_CXX03_LANG 1442 template <class _Iter1, class _Iter2> 1443 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1444 auto 1445 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1446 -> decltype(__x.base() - __y.base()); 1447#else 1448 template <class _Iter1, class _Iter2> 1449 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1450 typename __wrap_iter<_Iter1>::difference_type 1451 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1452#endif 1453 1454 template <class _Iter1> 1455 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1456 __wrap_iter<_Iter1> 1457 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1458 1459 template <class _Ip, class _Op> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _Op copy(_Ip, _Ip, _Op); 1460 template <class _B1, class _B2> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _B2 copy_backward(_B1, _B1, _B2); 1461 template <class _Ip, class _Op> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _Op move(_Ip, _Ip, _Op); 1462 template <class _B1, class _B2> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _B2 move_backward(_B1, _B1, _B2); 1463}; 1464 1465#if _LIBCPP_STD_VER <= 17 1466template <class _It> 1467struct __is_cpp17_contiguous_iterator<__wrap_iter<_It> > : __is_cpp17_contiguous_iterator<_It> {}; 1468#endif 1469 1470template <class _Iter> 1471_LIBCPP_CONSTEXPR 1472_EnableIf<__is_cpp17_contiguous_iterator<_Iter>::value, decltype(_VSTD::__to_address(declval<_Iter>()))> 1473__to_address(__wrap_iter<_Iter> __w) _NOEXCEPT { 1474 return _VSTD::__to_address(__w.base()); 1475} 1476 1477template <class _Iter1, class _Iter2> 1478inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1479bool 1480operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1481{ 1482 return __x.base() == __y.base(); 1483} 1484 1485template <class _Iter1, class _Iter2> 1486inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1487bool 1488operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1489{ 1490#if _LIBCPP_DEBUG_LEVEL == 2 1491 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1492 "Attempted to compare incomparable iterators"); 1493#endif 1494 return __x.base() < __y.base(); 1495} 1496 1497template <class _Iter1, class _Iter2> 1498inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1499bool 1500operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1501{ 1502 return !(__x == __y); 1503} 1504 1505template <class _Iter1, class _Iter2> 1506inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1507bool 1508operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1509{ 1510 return __y < __x; 1511} 1512 1513template <class _Iter1, class _Iter2> 1514inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1515bool 1516operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1517{ 1518 return !(__x < __y); 1519} 1520 1521template <class _Iter1, class _Iter2> 1522inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1523bool 1524operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1525{ 1526 return !(__y < __x); 1527} 1528 1529template <class _Iter1> 1530inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1531bool 1532operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1533{ 1534 return !(__x == __y); 1535} 1536 1537template <class _Iter1> 1538inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1539bool 1540operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1541{ 1542 return __y < __x; 1543} 1544 1545template <class _Iter1> 1546inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1547bool 1548operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1549{ 1550 return !(__x < __y); 1551} 1552 1553template <class _Iter1> 1554inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1555bool 1556operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1557{ 1558 return !(__y < __x); 1559} 1560 1561#ifndef _LIBCPP_CXX03_LANG 1562template <class _Iter1, class _Iter2> 1563inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1564auto 1565operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1566-> decltype(__x.base() - __y.base()) 1567{ 1568#if _LIBCPP_DEBUG_LEVEL == 2 1569 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1570 "Attempted to subtract incompatible iterators"); 1571#endif 1572 return __x.base() - __y.base(); 1573} 1574#else 1575template <class _Iter1, class _Iter2> 1576inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1577typename __wrap_iter<_Iter1>::difference_type 1578operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1579{ 1580#if _LIBCPP_DEBUG_LEVEL == 2 1581 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1582 "Attempted to subtract incompatible iterators"); 1583#endif 1584 return __x.base() - __y.base(); 1585} 1586#endif 1587 1588template <class _Iter> 1589inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1590__wrap_iter<_Iter> 1591operator+(typename __wrap_iter<_Iter>::difference_type __n, 1592 __wrap_iter<_Iter> __x) _NOEXCEPT 1593{ 1594 __x += __n; 1595 return __x; 1596} 1597 1598template <class _Tp, size_t _Np> 1599_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1600_Tp* 1601begin(_Tp (&__array)[_Np]) 1602{ 1603 return __array; 1604} 1605 1606template <class _Tp, size_t _Np> 1607_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1608_Tp* 1609end(_Tp (&__array)[_Np]) 1610{ 1611 return __array + _Np; 1612} 1613 1614#if !defined(_LIBCPP_CXX03_LANG) 1615 1616template <class _Cp> 1617_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1618auto 1619begin(_Cp& __c) -> decltype(__c.begin()) 1620{ 1621 return __c.begin(); 1622} 1623 1624template <class _Cp> 1625_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1626auto 1627begin(const _Cp& __c) -> decltype(__c.begin()) 1628{ 1629 return __c.begin(); 1630} 1631 1632template <class _Cp> 1633_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1634auto 1635end(_Cp& __c) -> decltype(__c.end()) 1636{ 1637 return __c.end(); 1638} 1639 1640template <class _Cp> 1641_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1642auto 1643end(const _Cp& __c) -> decltype(__c.end()) 1644{ 1645 return __c.end(); 1646} 1647 1648#if _LIBCPP_STD_VER > 11 1649 1650template <class _Tp, size_t _Np> 1651_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1652reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1653{ 1654 return reverse_iterator<_Tp*>(__array + _Np); 1655} 1656 1657template <class _Tp, size_t _Np> 1658_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1659reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1660{ 1661 return reverse_iterator<_Tp*>(__array); 1662} 1663 1664template <class _Ep> 1665_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1666reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1667{ 1668 return reverse_iterator<const _Ep*>(__il.end()); 1669} 1670 1671template <class _Ep> 1672_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1673reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1674{ 1675 return reverse_iterator<const _Ep*>(__il.begin()); 1676} 1677 1678template <class _Cp> 1679_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1680auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1681{ 1682 return _VSTD::begin(__c); 1683} 1684 1685template <class _Cp> 1686_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1687auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1688{ 1689 return _VSTD::end(__c); 1690} 1691 1692template <class _Cp> 1693_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1694auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1695{ 1696 return __c.rbegin(); 1697} 1698 1699template <class _Cp> 1700_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1701auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1702{ 1703 return __c.rbegin(); 1704} 1705 1706template <class _Cp> 1707_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1708auto rend(_Cp& __c) -> decltype(__c.rend()) 1709{ 1710 return __c.rend(); 1711} 1712 1713template <class _Cp> 1714_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1715auto rend(const _Cp& __c) -> decltype(__c.rend()) 1716{ 1717 return __c.rend(); 1718} 1719 1720template <class _Cp> 1721_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1722auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1723{ 1724 return _VSTD::rbegin(__c); 1725} 1726 1727template <class _Cp> 1728_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1729auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1730{ 1731 return _VSTD::rend(__c); 1732} 1733 1734#endif 1735 1736 1737#else // defined(_LIBCPP_CXX03_LANG) 1738 1739template <class _Cp> 1740_LIBCPP_INLINE_VISIBILITY 1741typename _Cp::iterator 1742begin(_Cp& __c) 1743{ 1744 return __c.begin(); 1745} 1746 1747template <class _Cp> 1748_LIBCPP_INLINE_VISIBILITY 1749typename _Cp::const_iterator 1750begin(const _Cp& __c) 1751{ 1752 return __c.begin(); 1753} 1754 1755template <class _Cp> 1756_LIBCPP_INLINE_VISIBILITY 1757typename _Cp::iterator 1758end(_Cp& __c) 1759{ 1760 return __c.end(); 1761} 1762 1763template <class _Cp> 1764_LIBCPP_INLINE_VISIBILITY 1765typename _Cp::const_iterator 1766end(const _Cp& __c) 1767{ 1768 return __c.end(); 1769} 1770 1771#endif // !defined(_LIBCPP_CXX03_LANG) 1772 1773#if _LIBCPP_STD_VER > 14 1774 1775// #if _LIBCPP_STD_VER > 11 1776// template <> 1777// struct _LIBCPP_TEMPLATE_VIS plus<void> 1778// { 1779// template <class _T1, class _T2> 1780// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1781// auto operator()(_T1&& __t, _T2&& __u) const 1782// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1783// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1784// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1785// typedef void is_transparent; 1786// }; 1787// #endif 1788 1789template <class _Cont> 1790_LIBCPP_INLINE_VISIBILITY 1791constexpr auto size(const _Cont& __c) 1792_NOEXCEPT_(noexcept(__c.size())) 1793-> decltype (__c.size()) 1794{ return __c.size(); } 1795 1796template <class _Tp, size_t _Sz> 1797_LIBCPP_INLINE_VISIBILITY 1798constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1799 1800#if _LIBCPP_STD_VER > 17 1801template <class _Cont> 1802_LIBCPP_INLINE_VISIBILITY 1803constexpr auto ssize(const _Cont& __c) 1804_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1805-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1806{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1807 1808template <class _Tp, ptrdiff_t _Sz> 1809_LIBCPP_INLINE_VISIBILITY 1810constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1811#endif 1812 1813template <class _Cont> 1814_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1815constexpr auto empty(const _Cont& __c) 1816_NOEXCEPT_(noexcept(__c.empty())) 1817-> decltype (__c.empty()) 1818{ return __c.empty(); } 1819 1820template <class _Tp, size_t _Sz> 1821_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1822constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1823 1824template <class _Ep> 1825_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1826constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1827 1828template <class _Cont> constexpr 1829_LIBCPP_INLINE_VISIBILITY 1830auto data(_Cont& __c) 1831_NOEXCEPT_(noexcept(__c.data())) 1832-> decltype (__c.data()) 1833{ return __c.data(); } 1834 1835template <class _Cont> constexpr 1836_LIBCPP_INLINE_VISIBILITY 1837auto data(const _Cont& __c) 1838_NOEXCEPT_(noexcept(__c.data())) 1839-> decltype (__c.data()) 1840{ return __c.data(); } 1841 1842template <class _Tp, size_t _Sz> 1843_LIBCPP_INLINE_VISIBILITY 1844constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1845 1846template <class _Ep> 1847_LIBCPP_INLINE_VISIBILITY 1848constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1849#endif 1850 1851template <class _Container, class _Predicate> 1852typename _Container::size_type 1853__libcpp_erase_if_container(_Container& __c, _Predicate& __pred) { 1854 typename _Container::size_type __old_size = __c.size(); 1855 1856 const typename _Container::iterator __last = __c.end(); 1857 for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) { 1858 if (__pred(*__iter)) 1859 __iter = __c.erase(__iter); 1860 else 1861 ++__iter; 1862 } 1863 1864 return __old_size - __c.size(); 1865} 1866 1867_LIBCPP_END_NAMESPACE_STD 1868 1869#endif // _LIBCPP_ITERATOR 1870