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 <__debug> 458#include <__functional_base> 459#include <__iterator/concepts.h> 460#include <__iterator/incrementable_traits.h> 461#include <__iterator/iter_move.h> 462#include <__iterator/iterator_traits.h> 463#include <__iterator/readable_traits.h> 464#include <__memory/addressof.h> 465#include <__memory/pointer_traits.h> 466#include <compare> 467#include <concepts> // Mandated by the Standard. 468#include <cstddef> 469#include <initializer_list> 470#include <iosfwd> // for forward declarations of vector and string 471#include <type_traits> 472#include <version> 473 474#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 475#pragma GCC system_header 476#endif 477 478_LIBCPP_BEGIN_NAMESPACE_STD 479 480template<class _Category, class _Tp, class _Distance = ptrdiff_t, 481 class _Pointer = _Tp*, class _Reference = _Tp&> 482struct _LIBCPP_TEMPLATE_VIS iterator 483{ 484 typedef _Tp value_type; 485 typedef _Distance difference_type; 486 typedef _Pointer pointer; 487 typedef _Reference reference; 488 typedef _Category iterator_category; 489}; 490 491template <class _InputIter> 492inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 493void __advance(_InputIter& __i, 494 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 495{ 496 for (; __n > 0; --__n) 497 ++__i; 498} 499 500template <class _BiDirIter> 501inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 502void __advance(_BiDirIter& __i, 503 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 504{ 505 if (__n >= 0) 506 for (; __n > 0; --__n) 507 ++__i; 508 else 509 for (; __n < 0; ++__n) 510 --__i; 511} 512 513template <class _RandIter> 514inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 515void __advance(_RandIter& __i, 516 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 517{ 518 __i += __n; 519} 520 521template <class _InputIter, class _Distance> 522inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 523void advance(_InputIter& __i, _Distance __orig_n) 524{ 525 _LIBCPP_ASSERT(__orig_n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 526 "Attempt to advance(it, n) with negative n on a non-bidirectional iterator"); 527 typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; 528 _IntegralSize __n = __orig_n; 529 _VSTD::__advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 530} 531 532template <class _InputIter> 533inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 534typename iterator_traits<_InputIter>::difference_type 535__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 536{ 537 typename iterator_traits<_InputIter>::difference_type __r(0); 538 for (; __first != __last; ++__first) 539 ++__r; 540 return __r; 541} 542 543template <class _RandIter> 544inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 545typename iterator_traits<_RandIter>::difference_type 546__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 547{ 548 return __last - __first; 549} 550 551template <class _InputIter> 552inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 553typename iterator_traits<_InputIter>::difference_type 554distance(_InputIter __first, _InputIter __last) 555{ 556 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 557} 558 559template <class _InputIter> 560inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 561typename enable_if 562< 563 __is_cpp17_input_iterator<_InputIter>::value, 564 _InputIter 565>::type 566next(_InputIter __x, 567 typename iterator_traits<_InputIter>::difference_type __n = 1) 568{ 569 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 570 "Attempt to next(it, n) with negative n on a non-bidirectional iterator"); 571 572 _VSTD::advance(__x, __n); 573 return __x; 574} 575 576template <class _InputIter> 577inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 578typename enable_if 579< 580 __is_cpp17_input_iterator<_InputIter>::value, 581 _InputIter 582>::type 583prev(_InputIter __x, 584 typename iterator_traits<_InputIter>::difference_type __n = 1) 585{ 586 _LIBCPP_ASSERT(__n <= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 587 "Attempt to prev(it, n) with a positive n on a non-bidirectional iterator"); 588 _VSTD::advance(__x, -__n); 589 return __x; 590} 591 592 593template <class _Tp, class = void> 594struct __is_stashing_iterator : false_type {}; 595 596template <class _Tp> 597struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 598 : true_type {}; 599 600template <class _Iter> 601class _LIBCPP_TEMPLATE_VIS reverse_iterator 602 : public iterator<typename iterator_traits<_Iter>::iterator_category, 603 typename iterator_traits<_Iter>::value_type, 604 typename iterator_traits<_Iter>::difference_type, 605 typename iterator_traits<_Iter>::pointer, 606 typename iterator_traits<_Iter>::reference> 607{ 608private: 609 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 610 611 static_assert(!__is_stashing_iterator<_Iter>::value, 612 "The specified iterator type cannot be used with reverse_iterator; " 613 "Using stashing iterators with reverse_iterator causes undefined behavior"); 614 615protected: 616 _Iter current; 617public: 618 typedef _Iter iterator_type; 619 typedef typename iterator_traits<_Iter>::difference_type difference_type; 620 typedef typename iterator_traits<_Iter>::reference reference; 621 typedef typename iterator_traits<_Iter>::pointer pointer; 622 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 623 random_access_iterator_tag, 624 typename iterator_traits<_Iter>::iterator_category> iterator_category; 625#if _LIBCPP_STD_VER > 17 626 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 627 random_access_iterator_tag, 628 bidirectional_iterator_tag> iterator_concept; 629#endif 630 631 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 632 reverse_iterator() : __t(), current() {} 633 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 634 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 635 template <class _Up> 636 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 637 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 638 template <class _Up> 639 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 640 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 641 { __t = current = __u.base(); return *this; } 642 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 643 _Iter base() const {return current;} 644 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 645 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 646 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 647 pointer operator->() const {return _VSTD::addressof(operator*());} 648 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 649 reverse_iterator& operator++() {--current; return *this;} 650 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 651 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 652 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 653 reverse_iterator& operator--() {++current; return *this;} 654 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 655 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 656 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 657 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 658 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 659 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 660 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 661 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 662 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 663 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 664 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 665 reference operator[](difference_type __n) const {return *(*this + __n);} 666}; 667 668template <class _Iter1, class _Iter2> 669inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 670bool 671operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 672{ 673 return __x.base() == __y.base(); 674} 675 676template <class _Iter1, class _Iter2> 677inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 678bool 679operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 680{ 681 return __x.base() > __y.base(); 682} 683 684template <class _Iter1, class _Iter2> 685inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 686bool 687operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 688{ 689 return __x.base() != __y.base(); 690} 691 692template <class _Iter1, class _Iter2> 693inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 694bool 695operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 696{ 697 return __x.base() < __y.base(); 698} 699 700template <class _Iter1, class _Iter2> 701inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 702bool 703operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 704{ 705 return __x.base() <= __y.base(); 706} 707 708template <class _Iter1, class _Iter2> 709inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 710bool 711operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 712{ 713 return __x.base() >= __y.base(); 714} 715 716#ifndef _LIBCPP_CXX03_LANG 717template <class _Iter1, class _Iter2> 718inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 719auto 720operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 721-> decltype(__y.base() - __x.base()) 722{ 723 return __y.base() - __x.base(); 724} 725#else 726template <class _Iter1, class _Iter2> 727inline _LIBCPP_INLINE_VISIBILITY 728typename reverse_iterator<_Iter1>::difference_type 729operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 730{ 731 return __y.base() - __x.base(); 732} 733#endif 734 735template <class _Iter> 736inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 737reverse_iterator<_Iter> 738operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 739{ 740 return reverse_iterator<_Iter>(__x.base() - __n); 741} 742 743#if _LIBCPP_STD_VER > 11 744template <class _Iter> 745inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 746reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 747{ 748 return reverse_iterator<_Iter>(__i); 749} 750#endif 751 752template <class _Container> 753class _LIBCPP_TEMPLATE_VIS back_insert_iterator 754 : public iterator<output_iterator_tag, 755 void, 756 void, 757 void, 758 void> 759{ 760protected: 761 _Container* container; 762public: 763 typedef _Container container_type; 764 765 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 766 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_) 767 {container->push_back(__value_); return *this;} 768#ifndef _LIBCPP_CXX03_LANG 769 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_) 770 {container->push_back(_VSTD::move(__value_)); return *this;} 771#endif // _LIBCPP_CXX03_LANG 772 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator*() {return *this;} 773 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator++() {return *this;} 774 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator operator++(int) {return *this;} 775}; 776 777template <class _Container> 778inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 779back_insert_iterator<_Container> 780back_inserter(_Container& __x) 781{ 782 return back_insert_iterator<_Container>(__x); 783} 784 785template <class _Container> 786class _LIBCPP_TEMPLATE_VIS front_insert_iterator 787 : public iterator<output_iterator_tag, 788 void, 789 void, 790 void, 791 void> 792{ 793protected: 794 _Container* container; 795public: 796 typedef _Container container_type; 797 798 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 799 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) 800 {container->push_front(__value_); return *this;} 801#ifndef _LIBCPP_CXX03_LANG 802 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) 803 {container->push_front(_VSTD::move(__value_)); return *this;} 804#endif // _LIBCPP_CXX03_LANG 805 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator*() {return *this;} 806 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator++() {return *this;} 807 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator operator++(int) {return *this;} 808}; 809 810template <class _Container> 811inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 812front_insert_iterator<_Container> 813front_inserter(_Container& __x) 814{ 815 return front_insert_iterator<_Container>(__x); 816} 817 818template <class _Container> 819class _LIBCPP_TEMPLATE_VIS insert_iterator 820 : public iterator<output_iterator_tag, 821 void, 822 void, 823 void, 824 void> 825{ 826protected: 827 _Container* container; 828 typename _Container::iterator iter; 829public: 830 typedef _Container container_type; 831 832 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, typename _Container::iterator __i) 833 : container(_VSTD::addressof(__x)), iter(__i) {} 834 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(const typename _Container::value_type& __value_) 835 {iter = container->insert(iter, __value_); ++iter; return *this;} 836#ifndef _LIBCPP_CXX03_LANG 837 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(typename _Container::value_type&& __value_) 838 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 839#endif // _LIBCPP_CXX03_LANG 840 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator*() {return *this;} 841 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++() {return *this;} 842 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int) {return *this;} 843}; 844 845template <class _Container> 846inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 847insert_iterator<_Container> 848inserter(_Container& __x, typename _Container::iterator __i) 849{ 850 return insert_iterator<_Container>(__x, __i); 851} 852 853template <class _Tp, class _CharT = char, 854 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 855class _LIBCPP_TEMPLATE_VIS istream_iterator 856 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 857{ 858public: 859 typedef _CharT char_type; 860 typedef _Traits traits_type; 861 typedef basic_istream<_CharT,_Traits> istream_type; 862private: 863 istream_type* __in_stream_; 864 _Tp __value_; 865public: 866 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 867 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 868 { 869 if (!(*__in_stream_ >> __value_)) 870 __in_stream_ = nullptr; 871 } 872 873 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 874 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 875 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 876 { 877 if (!(*__in_stream_ >> __value_)) 878 __in_stream_ = nullptr; 879 return *this; 880 } 881 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 882 {istream_iterator __t(*this); ++(*this); return __t;} 883 884 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 885 friend _LIBCPP_INLINE_VISIBILITY 886 bool 887 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 888 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 889 890 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 891 friend _LIBCPP_INLINE_VISIBILITY 892 bool 893 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 894 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 895}; 896 897template <class _Tp, class _CharT, class _Traits, class _Distance> 898inline _LIBCPP_INLINE_VISIBILITY 899bool 900operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 901 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 902{ 903 return __x.__in_stream_ == __y.__in_stream_; 904} 905 906template <class _Tp, class _CharT, class _Traits, class _Distance> 907inline _LIBCPP_INLINE_VISIBILITY 908bool 909operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 910 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 911{ 912 return !(__x == __y); 913} 914 915template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 916class _LIBCPP_TEMPLATE_VIS ostream_iterator 917 : public iterator<output_iterator_tag, void, void, void, void> 918{ 919public: 920 typedef output_iterator_tag iterator_category; 921 typedef void value_type; 922#if _LIBCPP_STD_VER > 17 923 typedef std::ptrdiff_t difference_type; 924#else 925 typedef void difference_type; 926#endif 927 typedef void pointer; 928 typedef void reference; 929 typedef _CharT char_type; 930 typedef _Traits traits_type; 931 typedef basic_ostream<_CharT, _Traits> ostream_type; 932 933private: 934 ostream_type* __out_stream_; 935 const char_type* __delim_; 936public: 937 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 938 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 939 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 940 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 941 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 942 { 943 *__out_stream_ << __value_; 944 if (__delim_) 945 *__out_stream_ << __delim_; 946 return *this; 947 } 948 949 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 950 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 951 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 952}; 953 954template<class _CharT, class _Traits> 955class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 956 : public iterator<input_iterator_tag, _CharT, 957 typename _Traits::off_type, _CharT*, 958 _CharT> 959{ 960public: 961 typedef _CharT char_type; 962 typedef _Traits traits_type; 963 typedef typename _Traits::int_type int_type; 964 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 965 typedef basic_istream<_CharT,_Traits> istream_type; 966private: 967 mutable streambuf_type* __sbuf_; 968 969 class __proxy 970 { 971 char_type __keep_; 972 streambuf_type* __sbuf_; 973 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 974 : __keep_(__c), __sbuf_(__s) {} 975 friend class istreambuf_iterator; 976 public: 977 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 978 }; 979 980 _LIBCPP_INLINE_VISIBILITY 981 bool __test_for_eof() const 982 { 983 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 984 __sbuf_ = nullptr; 985 return __sbuf_ == nullptr; 986 } 987public: 988 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 989 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 990 : __sbuf_(__s.rdbuf()) {} 991 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 992 : __sbuf_(__s) {} 993 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 994 : __sbuf_(__p.__sbuf_) {} 995 996 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 997 {return static_cast<char_type>(__sbuf_->sgetc());} 998 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 999 { 1000 __sbuf_->sbumpc(); 1001 return *this; 1002 } 1003 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1004 { 1005 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1006 } 1007 1008 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1009 {return __test_for_eof() == __b.__test_for_eof();} 1010}; 1011 1012template <class _CharT, class _Traits> 1013inline _LIBCPP_INLINE_VISIBILITY 1014bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1015 const istreambuf_iterator<_CharT,_Traits>& __b) 1016 {return __a.equal(__b);} 1017 1018template <class _CharT, class _Traits> 1019inline _LIBCPP_INLINE_VISIBILITY 1020bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1021 const istreambuf_iterator<_CharT,_Traits>& __b) 1022 {return !__a.equal(__b);} 1023 1024template <class _CharT, class _Traits> 1025class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1026 : public iterator<output_iterator_tag, void, void, void, void> 1027{ 1028public: 1029 typedef output_iterator_tag iterator_category; 1030 typedef void value_type; 1031#if _LIBCPP_STD_VER > 17 1032 typedef std::ptrdiff_t difference_type; 1033#else 1034 typedef void difference_type; 1035#endif 1036 typedef void pointer; 1037 typedef void reference; 1038 typedef _CharT char_type; 1039 typedef _Traits traits_type; 1040 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1041 typedef basic_ostream<_CharT, _Traits> ostream_type; 1042 1043private: 1044 streambuf_type* __sbuf_; 1045public: 1046 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1047 : __sbuf_(__s.rdbuf()) {} 1048 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1049 : __sbuf_(__s) {} 1050 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1051 { 1052 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1053 __sbuf_ = nullptr; 1054 return *this; 1055 } 1056 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1057 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1058 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1059 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1060 1061 template <class _Ch, class _Tr> 1062 friend 1063 _LIBCPP_HIDDEN 1064 ostreambuf_iterator<_Ch, _Tr> 1065 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1066 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1067 ios_base& __iob, _Ch __fl); 1068}; 1069 1070template <class _Iter> 1071class _LIBCPP_TEMPLATE_VIS move_iterator 1072{ 1073private: 1074 _Iter __i; 1075public: 1076 typedef _Iter iterator_type; 1077 typedef typename iterator_traits<iterator_type>::value_type value_type; 1078 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1079 typedef iterator_type pointer; 1080 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 1081 random_access_iterator_tag, 1082 typename iterator_traits<_Iter>::iterator_category> iterator_category; 1083#if _LIBCPP_STD_VER > 17 1084 typedef input_iterator_tag iterator_concept; 1085#endif 1086 1087#ifndef _LIBCPP_CXX03_LANG 1088 typedef typename iterator_traits<iterator_type>::reference __reference; 1089 typedef typename conditional< 1090 is_reference<__reference>::value, 1091 typename remove_reference<__reference>::type&&, 1092 __reference 1093 >::type reference; 1094#else 1095 typedef typename iterator_traits<iterator_type>::reference reference; 1096#endif 1097 1098 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1099 move_iterator() : __i() {} 1100 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1101 explicit move_iterator(_Iter __x) : __i(__x) {} 1102 template <class _Up> 1103 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1104 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1105 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1106 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1107 reference operator*() const { return static_cast<reference>(*__i); } 1108 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1109 pointer operator->() const { return __i;} 1110 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1111 move_iterator& operator++() {++__i; return *this;} 1112 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1113 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1114 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1115 move_iterator& operator--() {--__i; return *this;} 1116 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1117 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1118 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1119 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1120 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1121 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1122 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1123 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1124 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1125 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1126 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1127 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1128}; 1129 1130template <class _Iter1, class _Iter2> 1131inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1132bool 1133operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1134{ 1135 return __x.base() == __y.base(); 1136} 1137 1138template <class _Iter1, class _Iter2> 1139inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1140bool 1141operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1142{ 1143 return __x.base() < __y.base(); 1144} 1145 1146template <class _Iter1, class _Iter2> 1147inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1148bool 1149operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1150{ 1151 return __x.base() != __y.base(); 1152} 1153 1154template <class _Iter1, class _Iter2> 1155inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1156bool 1157operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1158{ 1159 return __x.base() > __y.base(); 1160} 1161 1162template <class _Iter1, class _Iter2> 1163inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1164bool 1165operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1166{ 1167 return __x.base() >= __y.base(); 1168} 1169 1170template <class _Iter1, class _Iter2> 1171inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1172bool 1173operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1174{ 1175 return __x.base() <= __y.base(); 1176} 1177 1178#ifndef _LIBCPP_CXX03_LANG 1179template <class _Iter1, class _Iter2> 1180inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1181auto 1182operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1183-> decltype(__x.base() - __y.base()) 1184{ 1185 return __x.base() - __y.base(); 1186} 1187#else 1188template <class _Iter1, class _Iter2> 1189inline _LIBCPP_INLINE_VISIBILITY 1190typename move_iterator<_Iter1>::difference_type 1191operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1192{ 1193 return __x.base() - __y.base(); 1194} 1195#endif 1196 1197template <class _Iter> 1198inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1199move_iterator<_Iter> 1200operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1201{ 1202 return move_iterator<_Iter>(__x.base() + __n); 1203} 1204 1205template <class _Iter> 1206inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1207move_iterator<_Iter> 1208make_move_iterator(_Iter __i) 1209{ 1210 return move_iterator<_Iter>(__i); 1211} 1212 1213// __wrap_iter 1214 1215template <class _Iter> class __wrap_iter; 1216 1217template <class _Iter1, class _Iter2> 1218_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1219bool 1220operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1221 1222template <class _Iter1, class _Iter2> 1223_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1224bool 1225operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1226 1227template <class _Iter1, class _Iter2> 1228_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1229bool 1230operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1231 1232template <class _Iter1, class _Iter2> 1233_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1234bool 1235operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1236 1237template <class _Iter1, class _Iter2> 1238_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1239bool 1240operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1241 1242template <class _Iter1, class _Iter2> 1243_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1244bool 1245operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1246 1247#ifndef _LIBCPP_CXX03_LANG 1248template <class _Iter1, class _Iter2> 1249_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1250auto 1251operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1252-> decltype(__x.base() - __y.base()); 1253#else 1254template <class _Iter1, class _Iter2> 1255_LIBCPP_INLINE_VISIBILITY 1256typename __wrap_iter<_Iter1>::difference_type 1257operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1258#endif 1259 1260template <class _Iter> 1261_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1262__wrap_iter<_Iter> 1263operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1264 1265template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1266template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1267template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1268template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1269 1270template <class _Iter> 1271class __wrap_iter 1272{ 1273public: 1274 typedef _Iter iterator_type; 1275 typedef typename iterator_traits<iterator_type>::value_type value_type; 1276 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1277 typedef typename iterator_traits<iterator_type>::pointer pointer; 1278 typedef typename iterator_traits<iterator_type>::reference reference; 1279 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1280#if _LIBCPP_STD_VER > 17 1281 typedef _If<__is_cpp17_contiguous_iterator<_Iter>::value, 1282 contiguous_iterator_tag, iterator_category> iterator_concept; 1283#endif 1284 1285private: 1286 iterator_type __i; 1287public: 1288 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1289#if _LIBCPP_STD_VER > 11 1290 : __i{} 1291#endif 1292 { 1293#if _LIBCPP_DEBUG_LEVEL == 2 1294 __get_db()->__insert_i(this); 1295#endif 1296 } 1297 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1298 __wrap_iter(const __wrap_iter<_Up>& __u, 1299 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1300 : __i(__u.base()) 1301 { 1302#if _LIBCPP_DEBUG_LEVEL == 2 1303 __get_db()->__iterator_copy(this, &__u); 1304#endif 1305 } 1306#if _LIBCPP_DEBUG_LEVEL == 2 1307 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1308 __wrap_iter(const __wrap_iter& __x) 1309 : __i(__x.base()) 1310 { 1311 __get_db()->__iterator_copy(this, &__x); 1312 } 1313 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1314 __wrap_iter& operator=(const __wrap_iter& __x) 1315 { 1316 if (this != &__x) 1317 { 1318 __get_db()->__iterator_copy(this, &__x); 1319 __i = __x.__i; 1320 } 1321 return *this; 1322 } 1323 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1324 ~__wrap_iter() 1325 { 1326 __get_db()->__erase_i(this); 1327 } 1328#endif 1329 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1330 { 1331#if _LIBCPP_DEBUG_LEVEL == 2 1332 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1333 "Attempted to dereference a non-dereferenceable iterator"); 1334#endif 1335 return *__i; 1336 } 1337 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1338 { 1339#if _LIBCPP_DEBUG_LEVEL == 2 1340 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1341 "Attempted to dereference a non-dereferenceable iterator"); 1342#endif 1343 return (pointer)_VSTD::addressof(*__i); 1344 } 1345 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1346 { 1347#if _LIBCPP_DEBUG_LEVEL == 2 1348 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1349 "Attempted to increment non-incrementable iterator"); 1350#endif 1351 ++__i; 1352 return *this; 1353 } 1354 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1355 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1356 1357 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1358 { 1359#if _LIBCPP_DEBUG_LEVEL == 2 1360 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1361 "Attempted to decrement non-decrementable iterator"); 1362#endif 1363 --__i; 1364 return *this; 1365 } 1366 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1367 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1368 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1369 {__wrap_iter __w(*this); __w += __n; return __w;} 1370 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1371 { 1372#if _LIBCPP_DEBUG_LEVEL == 2 1373 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1374 "Attempted to add/subtract iterator outside of valid range"); 1375#endif 1376 __i += __n; 1377 return *this; 1378 } 1379 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1380 {return *this + (-__n);} 1381 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1382 {*this += -__n; return *this;} 1383 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1384 { 1385#if _LIBCPP_DEBUG_LEVEL == 2 1386 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1387 "Attempted to subscript iterator outside of valid range"); 1388#endif 1389 return __i[__n]; 1390 } 1391 1392 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1393 1394private: 1395#if _LIBCPP_DEBUG_LEVEL == 2 1396 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1397 { 1398 __get_db()->__insert_ic(this, __p); 1399 } 1400#else 1401 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1402#endif 1403 1404 template <class _Up> friend class __wrap_iter; 1405 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1406 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1407 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1408 1409 template <class _Iter1, class _Iter2> 1410 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1411 bool 1412 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1413 1414 template <class _Iter1, class _Iter2> 1415 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1416 bool 1417 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1418 1419 template <class _Iter1, class _Iter2> 1420 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1421 bool 1422 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1423 1424 template <class _Iter1, class _Iter2> 1425 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1426 bool 1427 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1428 1429 template <class _Iter1, class _Iter2> 1430 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1431 bool 1432 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1433 1434 template <class _Iter1, class _Iter2> 1435 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1436 bool 1437 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1438 1439#ifndef _LIBCPP_CXX03_LANG 1440 template <class _Iter1, class _Iter2> 1441 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1442 auto 1443 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1444 -> decltype(__x.base() - __y.base()); 1445#else 1446 template <class _Iter1, class _Iter2> 1447 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1448 typename __wrap_iter<_Iter1>::difference_type 1449 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1450#endif 1451 1452 template <class _Iter1> 1453 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1454 __wrap_iter<_Iter1> 1455 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1456}; 1457 1458#if _LIBCPP_STD_VER <= 17 1459template <class _It> 1460struct __is_cpp17_contiguous_iterator<__wrap_iter<_It> > : __is_cpp17_contiguous_iterator<_It> {}; 1461#endif 1462 1463template <class _Iter> 1464_LIBCPP_CONSTEXPR 1465_EnableIf<__is_cpp17_contiguous_iterator<_Iter>::value, decltype(_VSTD::__to_address(declval<_Iter>()))> 1466__to_address(__wrap_iter<_Iter> __w) _NOEXCEPT { 1467 return _VSTD::__to_address(__w.base()); 1468} 1469 1470template <class _Iter1, class _Iter2> 1471inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1472bool 1473operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1474{ 1475 return __x.base() == __y.base(); 1476} 1477 1478template <class _Iter1, class _Iter2> 1479inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1480bool 1481operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1482{ 1483#if _LIBCPP_DEBUG_LEVEL == 2 1484 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1485 "Attempted to compare incomparable iterators"); 1486#endif 1487 return __x.base() < __y.base(); 1488} 1489 1490template <class _Iter1, class _Iter2> 1491inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1492bool 1493operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1494{ 1495 return !(__x == __y); 1496} 1497 1498template <class _Iter1, class _Iter2> 1499inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1500bool 1501operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1502{ 1503 return __y < __x; 1504} 1505 1506template <class _Iter1, class _Iter2> 1507inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1508bool 1509operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1510{ 1511 return !(__x < __y); 1512} 1513 1514template <class _Iter1, class _Iter2> 1515inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1516bool 1517operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1518{ 1519 return !(__y < __x); 1520} 1521 1522template <class _Iter1> 1523inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1524bool 1525operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1526{ 1527 return !(__x == __y); 1528} 1529 1530template <class _Iter1> 1531inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1532bool 1533operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1534{ 1535 return __y < __x; 1536} 1537 1538template <class _Iter1> 1539inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1540bool 1541operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1542{ 1543 return !(__x < __y); 1544} 1545 1546template <class _Iter1> 1547inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1548bool 1549operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1550{ 1551 return !(__y < __x); 1552} 1553 1554#ifndef _LIBCPP_CXX03_LANG 1555template <class _Iter1, class _Iter2> 1556inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1557auto 1558operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1559-> decltype(__x.base() - __y.base()) 1560{ 1561#if _LIBCPP_DEBUG_LEVEL == 2 1562 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1563 "Attempted to subtract incompatible iterators"); 1564#endif 1565 return __x.base() - __y.base(); 1566} 1567#else 1568template <class _Iter1, class _Iter2> 1569inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1570typename __wrap_iter<_Iter1>::difference_type 1571operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1572{ 1573#if _LIBCPP_DEBUG_LEVEL == 2 1574 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1575 "Attempted to subtract incompatible iterators"); 1576#endif 1577 return __x.base() - __y.base(); 1578} 1579#endif 1580 1581template <class _Iter> 1582inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1583__wrap_iter<_Iter> 1584operator+(typename __wrap_iter<_Iter>::difference_type __n, 1585 __wrap_iter<_Iter> __x) _NOEXCEPT 1586{ 1587 __x += __n; 1588 return __x; 1589} 1590 1591template <class _Tp, size_t _Np> 1592_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1593_Tp* 1594begin(_Tp (&__array)[_Np]) 1595{ 1596 return __array; 1597} 1598 1599template <class _Tp, size_t _Np> 1600_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1601_Tp* 1602end(_Tp (&__array)[_Np]) 1603{ 1604 return __array + _Np; 1605} 1606 1607#if !defined(_LIBCPP_CXX03_LANG) 1608 1609template <class _Cp> 1610_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1611auto 1612begin(_Cp& __c) -> decltype(__c.begin()) 1613{ 1614 return __c.begin(); 1615} 1616 1617template <class _Cp> 1618_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1619auto 1620begin(const _Cp& __c) -> decltype(__c.begin()) 1621{ 1622 return __c.begin(); 1623} 1624 1625template <class _Cp> 1626_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1627auto 1628end(_Cp& __c) -> decltype(__c.end()) 1629{ 1630 return __c.end(); 1631} 1632 1633template <class _Cp> 1634_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1635auto 1636end(const _Cp& __c) -> decltype(__c.end()) 1637{ 1638 return __c.end(); 1639} 1640 1641#if _LIBCPP_STD_VER > 11 1642 1643template <class _Tp, size_t _Np> 1644_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1645reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1646{ 1647 return reverse_iterator<_Tp*>(__array + _Np); 1648} 1649 1650template <class _Tp, size_t _Np> 1651_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1652reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1653{ 1654 return reverse_iterator<_Tp*>(__array); 1655} 1656 1657template <class _Ep> 1658_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1659reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1660{ 1661 return reverse_iterator<const _Ep*>(__il.end()); 1662} 1663 1664template <class _Ep> 1665_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1666reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1667{ 1668 return reverse_iterator<const _Ep*>(__il.begin()); 1669} 1670 1671template <class _Cp> 1672_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1673auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1674{ 1675 return _VSTD::begin(__c); 1676} 1677 1678template <class _Cp> 1679_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1680auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1681{ 1682 return _VSTD::end(__c); 1683} 1684 1685template <class _Cp> 1686_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1687auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1688{ 1689 return __c.rbegin(); 1690} 1691 1692template <class _Cp> 1693_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1694auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1695{ 1696 return __c.rbegin(); 1697} 1698 1699template <class _Cp> 1700_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1701auto rend(_Cp& __c) -> decltype(__c.rend()) 1702{ 1703 return __c.rend(); 1704} 1705 1706template <class _Cp> 1707_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1708auto rend(const _Cp& __c) -> decltype(__c.rend()) 1709{ 1710 return __c.rend(); 1711} 1712 1713template <class _Cp> 1714_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1715auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1716{ 1717 return _VSTD::rbegin(__c); 1718} 1719 1720template <class _Cp> 1721_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1722auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1723{ 1724 return _VSTD::rend(__c); 1725} 1726 1727#endif 1728 1729 1730#else // defined(_LIBCPP_CXX03_LANG) 1731 1732template <class _Cp> 1733_LIBCPP_INLINE_VISIBILITY 1734typename _Cp::iterator 1735begin(_Cp& __c) 1736{ 1737 return __c.begin(); 1738} 1739 1740template <class _Cp> 1741_LIBCPP_INLINE_VISIBILITY 1742typename _Cp::const_iterator 1743begin(const _Cp& __c) 1744{ 1745 return __c.begin(); 1746} 1747 1748template <class _Cp> 1749_LIBCPP_INLINE_VISIBILITY 1750typename _Cp::iterator 1751end(_Cp& __c) 1752{ 1753 return __c.end(); 1754} 1755 1756template <class _Cp> 1757_LIBCPP_INLINE_VISIBILITY 1758typename _Cp::const_iterator 1759end(const _Cp& __c) 1760{ 1761 return __c.end(); 1762} 1763 1764#endif // !defined(_LIBCPP_CXX03_LANG) 1765 1766#if _LIBCPP_STD_VER > 14 1767 1768// #if _LIBCPP_STD_VER > 11 1769// template <> 1770// struct _LIBCPP_TEMPLATE_VIS plus<void> 1771// { 1772// template <class _T1, class _T2> 1773// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1774// auto operator()(_T1&& __t, _T2&& __u) const 1775// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1776// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1777// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1778// typedef void is_transparent; 1779// }; 1780// #endif 1781 1782template <class _Cont> 1783_LIBCPP_INLINE_VISIBILITY 1784constexpr auto size(const _Cont& __c) 1785_NOEXCEPT_(noexcept(__c.size())) 1786-> decltype (__c.size()) 1787{ return __c.size(); } 1788 1789template <class _Tp, size_t _Sz> 1790_LIBCPP_INLINE_VISIBILITY 1791constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1792 1793#if _LIBCPP_STD_VER > 17 1794template <class _Cont> 1795_LIBCPP_INLINE_VISIBILITY 1796constexpr auto ssize(const _Cont& __c) 1797_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1798-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1799{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1800 1801template <class _Tp, ptrdiff_t _Sz> 1802_LIBCPP_INLINE_VISIBILITY 1803constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1804#endif 1805 1806template <class _Cont> 1807_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1808constexpr auto empty(const _Cont& __c) 1809_NOEXCEPT_(noexcept(__c.empty())) 1810-> decltype (__c.empty()) 1811{ return __c.empty(); } 1812 1813template <class _Tp, size_t _Sz> 1814_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1815constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1816 1817template <class _Ep> 1818_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1819constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1820 1821template <class _Cont> constexpr 1822_LIBCPP_INLINE_VISIBILITY 1823auto data(_Cont& __c) 1824_NOEXCEPT_(noexcept(__c.data())) 1825-> decltype (__c.data()) 1826{ return __c.data(); } 1827 1828template <class _Cont> constexpr 1829_LIBCPP_INLINE_VISIBILITY 1830auto data(const _Cont& __c) 1831_NOEXCEPT_(noexcept(__c.data())) 1832-> decltype (__c.data()) 1833{ return __c.data(); } 1834 1835template <class _Tp, size_t _Sz> 1836_LIBCPP_INLINE_VISIBILITY 1837constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1838 1839template <class _Ep> 1840_LIBCPP_INLINE_VISIBILITY 1841constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1842#endif 1843 1844template <class _Container, class _Predicate> 1845typename _Container::size_type 1846__libcpp_erase_if_container(_Container& __c, _Predicate& __pred) { 1847 typename _Container::size_type __old_size = __c.size(); 1848 1849 const typename _Container::iterator __last = __c.end(); 1850 for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) { 1851 if (__pred(*__iter)) 1852 __iter = __c.erase(__iter); 1853 else 1854 ++__iter; 1855 } 1856 1857 return __old_size - __c.size(); 1858} 1859 1860_LIBCPP_END_NAMESPACE_STD 1861 1862#endif // _LIBCPP_ITERATOR 1863