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 78// [iterator.concept.input], concept input_iterator 79template<class I> 80 concept input_iterator = see below; // since C++20 81 82// [iterator.concept.forward], concept forward_iterator 83template<class I> 84 concept forward_iterator = see below; // since C++20 85 86// [iterator.concept.bidir], concept bidirectional_iterator 87template<class I> 88 concept bidirectional_iterator = see below; // since C++20 89 90// [iterator.concept.random.access], concept random_access_iterator 91template<class I> 92 concept random_access_iterator = see below; // since C++20 93 94template<class Category, class T, class Distance = ptrdiff_t, 95 class Pointer = T*, class Reference = T&> 96struct iterator 97{ 98 typedef T value_type; 99 typedef Distance difference_type; 100 typedef Pointer pointer; 101 typedef Reference reference; 102 typedef Category iterator_category; 103}; 104 105struct input_iterator_tag {}; 106struct output_iterator_tag {}; 107struct forward_iterator_tag : public input_iterator_tag {}; 108struct bidirectional_iterator_tag : public forward_iterator_tag {}; 109struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 110 111// 27.4.3, iterator operations 112template <class InputIterator, class Distance> // constexpr in C++17 113 constexpr void advance(InputIterator& i, Distance n); 114 115template <class InputIterator> // constexpr in C++17 116 constexpr typename iterator_traits<InputIterator>::difference_type 117 distance(InputIterator first, InputIterator last); 118 119template <class InputIterator> // constexpr in C++17 120 constexpr InputIterator next(InputIterator x, 121typename iterator_traits<InputIterator>::difference_type n = 1); 122 123template <class BidirectionalIterator> // constexpr in C++17 124 constexpr BidirectionalIterator prev(BidirectionalIterator x, 125 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 126 127template <class Iterator> 128class reverse_iterator 129 : public iterator<typename iterator_traits<Iterator>::iterator_category, 130 typename iterator_traits<Iterator>::value_type, 131 typename iterator_traits<Iterator>::difference_type, 132 typename iterator_traits<Iterator>::pointer, 133 typename iterator_traits<Iterator>::reference> 134{ 135protected: 136 Iterator current; 137public: 138 typedef Iterator iterator_type; 139 typedef typename iterator_traits<Iterator>::difference_type difference_type; 140 typedef typename iterator_traits<Iterator>::reference reference; 141 typedef typename iterator_traits<Iterator>::pointer pointer; 142 143 constexpr reverse_iterator(); 144 constexpr explicit reverse_iterator(Iterator x); 145 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 146 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 147 constexpr Iterator base() const; 148 constexpr reference operator*() const; 149 constexpr pointer operator->() const; 150 constexpr reverse_iterator& operator++(); 151 constexpr reverse_iterator operator++(int); 152 constexpr reverse_iterator& operator--(); 153 constexpr reverse_iterator operator--(int); 154 constexpr reverse_iterator operator+ (difference_type n) const; 155 constexpr reverse_iterator& operator+=(difference_type n); 156 constexpr reverse_iterator operator- (difference_type n) const; 157 constexpr reverse_iterator& operator-=(difference_type n); 158 constexpr reference operator[](difference_type n) const; 159}; 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 bool // constexpr in C++17 171operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 172 173template <class Iterator1, class Iterator2> 174constexpr bool // constexpr in C++17 175operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 176 177template <class Iterator1, class Iterator2> 178constexpr bool // constexpr in C++17 179operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 180 181template <class Iterator1, class Iterator2> 182constexpr bool // constexpr in C++17 183operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 184 185template <class Iterator1, class Iterator2> 186constexpr auto 187operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 188-> decltype(__y.base() - __x.base()); // constexpr in C++17 189 190template <class Iterator> 191constexpr reverse_iterator<Iterator> 192operator+(typename reverse_iterator<Iterator>::difference_type n, 193 const reverse_iterator<Iterator>& x); // constexpr in C++17 194 195template <class Iterator> 196constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 197 198template <class Container> 199class back_insert_iterator 200{ 201protected: 202 Container* container; 203public: 204 typedef Container container_type; 205 typedef void value_type; 206 typedef void difference_type; 207 typedef void reference; 208 typedef void pointer; 209 210 explicit back_insert_iterator(Container& x); // constexpr in C++20 211 back_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 212 back_insert_iterator& operator*(); // constexpr in C++20 213 back_insert_iterator& operator++(); // constexpr in C++20 214 back_insert_iterator operator++(int); // constexpr in C++20 215}; 216 217template <class Container> back_insert_iterator<Container> back_inserter(Container& x); // constexpr in C++20 218 219template <class Container> 220class front_insert_iterator 221{ 222protected: 223 Container* container; 224public: 225 typedef Container container_type; 226 typedef void value_type; 227 typedef void difference_type; 228 typedef void reference; 229 typedef void pointer; 230 231 explicit front_insert_iterator(Container& x); // constexpr in C++20 232 front_insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 233 front_insert_iterator& operator*(); // constexpr in C++20 234 front_insert_iterator& operator++(); // constexpr in C++20 235 front_insert_iterator operator++(int); // constexpr in C++20 236}; 237 238template <class Container> front_insert_iterator<Container> front_inserter(Container& x); // constexpr in C++20 239 240template <class Container> 241class insert_iterator 242{ 243protected: 244 Container* container; 245 typename Container::iterator iter; 246public: 247 typedef Container container_type; 248 typedef void value_type; 249 typedef void difference_type; 250 typedef void reference; 251 typedef void pointer; 252 253 insert_iterator(Container& x, typename Container::iterator i); // constexpr in C++20 254 insert_iterator& operator=(const typename Container::value_type& value); // constexpr in C++20 255 insert_iterator& operator*(); // constexpr in C++20 256 insert_iterator& operator++(); // constexpr in C++20 257 insert_iterator& operator++(int); // constexpr in C++20 258}; 259 260template <class Container, class Iterator> 261insert_iterator<Container> inserter(Container& x, Iterator i); // constexpr in C++20 262 263template <class Iterator> 264class move_iterator { 265public: 266 typedef Iterator iterator_type; 267 typedef typename iterator_traits<Iterator>::difference_type difference_type; 268 typedef Iterator pointer; 269 typedef typename iterator_traits<Iterator>::value_type value_type; 270 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 271 typedef value_type&& reference; 272 273 constexpr move_iterator(); // all the constexprs are in C++17 274 constexpr explicit move_iterator(Iterator i); 275 template <class U> 276 constexpr move_iterator(const move_iterator<U>& u); 277 template <class U> 278 constexpr move_iterator& operator=(const move_iterator<U>& u); 279 constexpr iterator_type base() const; 280 constexpr reference operator*() const; 281 constexpr pointer operator->() const; 282 constexpr move_iterator& operator++(); 283 constexpr move_iterator operator++(int); 284 constexpr move_iterator& operator--(); 285 constexpr move_iterator operator--(int); 286 constexpr move_iterator operator+(difference_type n) const; 287 constexpr move_iterator& operator+=(difference_type n); 288 constexpr move_iterator operator-(difference_type n) const; 289 constexpr move_iterator& operator-=(difference_type n); 290 constexpr unspecified operator[](difference_type n) const; 291private: 292 Iterator current; // exposition only 293}; 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 bool // constexpr in C++17 305operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 306 307template <class Iterator1, class Iterator2> 308constexpr bool // constexpr in C++17 309operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 310 311template <class Iterator1, class Iterator2> 312constexpr bool // constexpr in C++17 313operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 314 315template <class Iterator1, class Iterator2> 316constexpr bool // constexpr in C++17 317operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 318 319template <class Iterator1, class Iterator2> 320constexpr auto // constexpr in C++17 321operator-(const move_iterator<Iterator1>& x, 322 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 323 324template <class Iterator> 325constexpr move_iterator<Iterator> operator+( // constexpr in C++17 326 typename move_iterator<Iterator>::difference_type n, 327 const move_iterator<Iterator>& x); 328 329template <class Iterator> // constexpr in C++17 330constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 331 332 333template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 334class istream_iterator 335 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> 336{ 337public: 338 typedef charT char_type; 339 typedef traits traits_type; 340 typedef basic_istream<charT,traits> istream_type; 341 342 constexpr istream_iterator(); 343 istream_iterator(istream_type& s); 344 istream_iterator(const istream_iterator& x); 345 ~istream_iterator(); 346 347 const T& operator*() const; 348 const T* operator->() const; 349 istream_iterator& operator++(); 350 istream_iterator operator++(int); 351}; 352 353template <class T, class charT, class traits, class Distance> 354bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 355 const istream_iterator<T,charT,traits,Distance>& y); 356template <class T, class charT, class traits, class Distance> 357bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 358 const istream_iterator<T,charT,traits,Distance>& y); 359 360template <class T, class charT = char, class traits = char_traits<charT> > 361class ostream_iterator 362 : public iterator<output_iterator_tag, void, void, void ,void> 363{ 364public: 365 typedef charT char_type; 366 typedef traits traits_type; 367 typedef basic_ostream<charT,traits> ostream_type; 368 369 ostream_iterator(ostream_type& s); 370 ostream_iterator(ostream_type& s, const charT* delimiter); 371 ostream_iterator(const ostream_iterator& x); 372 ~ostream_iterator(); 373 ostream_iterator& operator=(const T& value); 374 375 ostream_iterator& operator*(); 376 ostream_iterator& operator++(); 377 ostream_iterator& operator++(int); 378}; 379 380template<class charT, class traits = char_traits<charT> > 381class istreambuf_iterator 382 : public iterator<input_iterator_tag, charT, 383 typename traits::off_type, unspecified, 384 charT> 385{ 386public: 387 typedef charT char_type; 388 typedef traits traits_type; 389 typedef typename traits::int_type int_type; 390 typedef basic_streambuf<charT,traits> streambuf_type; 391 typedef basic_istream<charT,traits> istream_type; 392 393 istreambuf_iterator() noexcept; 394 istreambuf_iterator(istream_type& s) noexcept; 395 istreambuf_iterator(streambuf_type* s) noexcept; 396 istreambuf_iterator(a-private-type) noexcept; 397 398 charT operator*() const; 399 pointer operator->() const; 400 istreambuf_iterator& operator++(); 401 a-private-type operator++(int); 402 403 bool equal(const istreambuf_iterator& b) const; 404}; 405 406template <class charT, class traits> 407bool operator==(const istreambuf_iterator<charT,traits>& a, 408 const istreambuf_iterator<charT,traits>& b); 409template <class charT, class traits> 410bool operator!=(const istreambuf_iterator<charT,traits>& a, 411 const istreambuf_iterator<charT,traits>& b); 412 413template <class charT, class traits = char_traits<charT> > 414class ostreambuf_iterator 415 : public iterator<output_iterator_tag, void, void, void, void> 416{ 417public: 418 typedef charT char_type; 419 typedef traits traits_type; 420 typedef basic_streambuf<charT,traits> streambuf_type; 421 typedef basic_ostream<charT,traits> ostream_type; 422 423 ostreambuf_iterator(ostream_type& s) noexcept; 424 ostreambuf_iterator(streambuf_type* s) noexcept; 425 ostreambuf_iterator& operator=(charT c); 426 ostreambuf_iterator& operator*(); 427 ostreambuf_iterator& operator++(); 428 ostreambuf_iterator& operator++(int); 429 bool failed() const noexcept; 430}; 431 432template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 433template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 434template <class C> constexpr auto end(C& c) -> decltype(c.end()); 435template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 436template <class T, size_t N> constexpr T* begin(T (&array)[N]); 437template <class T, size_t N> constexpr T* end(T (&array)[N]); 438 439template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 440template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 441template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 442template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 443template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 444template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 445template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 446template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 447template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 448template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 449template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 450template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 451 452// 24.8, container access: 453template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 454template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 455 456template <class C> constexpr auto ssize(const C& c) 457 -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 458template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 459 460template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 461template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 462template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 463template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 464template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 465template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 466template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 467 468} // std 469 470*/ 471 472#include <__config> 473#include <__debug> 474#include <__functional_base> 475#include <__iterator/concepts.h> 476#include <__iterator/incrementable_traits.h> 477#include <__iterator/iter_move.h> 478#include <__iterator/iterator_traits.h> 479#include <__iterator/readable_traits.h> 480#include <__memory/addressof.h> 481#include <__memory/pointer_traits.h> 482#include <compare> 483#include <concepts> // Mandated by the Standard. 484#include <cstddef> 485#include <initializer_list> 486#include <iosfwd> // for forward declarations of vector and string 487#include <type_traits> 488#include <version> 489 490#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 491#pragma GCC system_header 492#endif 493 494_LIBCPP_BEGIN_NAMESPACE_STD 495 496template<class _Category, class _Tp, class _Distance = ptrdiff_t, 497 class _Pointer = _Tp*, class _Reference = _Tp&> 498struct _LIBCPP_TEMPLATE_VIS iterator 499{ 500 typedef _Tp value_type; 501 typedef _Distance difference_type; 502 typedef _Pointer pointer; 503 typedef _Reference reference; 504 typedef _Category iterator_category; 505}; 506 507template <class _InputIter> 508inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 509void __advance(_InputIter& __i, 510 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 511{ 512 for (; __n > 0; --__n) 513 ++__i; 514} 515 516template <class _BiDirIter> 517inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 518void __advance(_BiDirIter& __i, 519 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 520{ 521 if (__n >= 0) 522 for (; __n > 0; --__n) 523 ++__i; 524 else 525 for (; __n < 0; ++__n) 526 --__i; 527} 528 529template <class _RandIter> 530inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 531void __advance(_RandIter& __i, 532 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 533{ 534 __i += __n; 535} 536 537template <class _InputIter, class _Distance> 538inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 539void advance(_InputIter& __i, _Distance __orig_n) 540{ 541 typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; 542 _IntegralSize __n = __orig_n; 543 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 544 "Attempt to advance(it, n) with negative n on a non-bidirectional iterator"); 545 _VSTD::__advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 546} 547 548template <class _InputIter> 549inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 550typename iterator_traits<_InputIter>::difference_type 551__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 552{ 553 typename iterator_traits<_InputIter>::difference_type __r(0); 554 for (; __first != __last; ++__first) 555 ++__r; 556 return __r; 557} 558 559template <class _RandIter> 560inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 561typename iterator_traits<_RandIter>::difference_type 562__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 563{ 564 return __last - __first; 565} 566 567template <class _InputIter> 568inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 569typename iterator_traits<_InputIter>::difference_type 570distance(_InputIter __first, _InputIter __last) 571{ 572 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 573} 574 575template <class _InputIter> 576inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 577typename enable_if 578< 579 __is_cpp17_input_iterator<_InputIter>::value, 580 _InputIter 581>::type 582next(_InputIter __x, 583 typename iterator_traits<_InputIter>::difference_type __n = 1) 584{ 585 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 586 "Attempt to next(it, n) with negative n on a non-bidirectional iterator"); 587 588 _VSTD::advance(__x, __n); 589 return __x; 590} 591 592template <class _InputIter> 593inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 594typename enable_if 595< 596 __is_cpp17_input_iterator<_InputIter>::value, 597 _InputIter 598>::type 599prev(_InputIter __x, 600 typename iterator_traits<_InputIter>::difference_type __n = 1) 601{ 602 _LIBCPP_ASSERT(__n <= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 603 "Attempt to prev(it, n) with a positive n on a non-bidirectional iterator"); 604 _VSTD::advance(__x, -__n); 605 return __x; 606} 607 608 609template <class _Tp, class = void> 610struct __is_stashing_iterator : false_type {}; 611 612template <class _Tp> 613struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 614 : true_type {}; 615 616template <class _Iter> 617class _LIBCPP_TEMPLATE_VIS reverse_iterator 618 : public iterator<typename iterator_traits<_Iter>::iterator_category, 619 typename iterator_traits<_Iter>::value_type, 620 typename iterator_traits<_Iter>::difference_type, 621 typename iterator_traits<_Iter>::pointer, 622 typename iterator_traits<_Iter>::reference> 623{ 624private: 625 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 626 627 static_assert(!__is_stashing_iterator<_Iter>::value, 628 "The specified iterator type cannot be used with reverse_iterator; " 629 "Using stashing iterators with reverse_iterator causes undefined behavior"); 630 631protected: 632 _Iter current; 633public: 634 typedef _Iter iterator_type; 635 typedef typename iterator_traits<_Iter>::difference_type difference_type; 636 typedef typename iterator_traits<_Iter>::reference reference; 637 typedef typename iterator_traits<_Iter>::pointer pointer; 638 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 639 random_access_iterator_tag, 640 typename iterator_traits<_Iter>::iterator_category> iterator_category; 641#if _LIBCPP_STD_VER > 17 642 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 643 random_access_iterator_tag, 644 bidirectional_iterator_tag> iterator_concept; 645#endif 646 647 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 648 reverse_iterator() : __t(), current() {} 649 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 650 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 651 template <class _Up> 652 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 653 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 654 template <class _Up> 655 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 656 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 657 { __t = current = __u.base(); return *this; } 658 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 659 _Iter base() const {return current;} 660 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 661 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 662 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 663 pointer operator->() const {return _VSTD::addressof(operator*());} 664 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 665 reverse_iterator& operator++() {--current; return *this;} 666 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 667 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 668 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 669 reverse_iterator& operator--() {++current; return *this;} 670 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 671 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 672 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 673 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 674 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 675 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 676 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 677 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 678 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 679 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 680 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 681 reference operator[](difference_type __n) const {return *(*this + __n);} 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 716template <class _Iter1, class _Iter2> 717inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 718bool 719operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 720{ 721 return __x.base() <= __y.base(); 722} 723 724template <class _Iter1, class _Iter2> 725inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 726bool 727operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 728{ 729 return __x.base() >= __y.base(); 730} 731 732#ifndef _LIBCPP_CXX03_LANG 733template <class _Iter1, class _Iter2> 734inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 735auto 736operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 737-> decltype(__y.base() - __x.base()) 738{ 739 return __y.base() - __x.base(); 740} 741#else 742template <class _Iter1, class _Iter2> 743inline _LIBCPP_INLINE_VISIBILITY 744typename reverse_iterator<_Iter1>::difference_type 745operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 746{ 747 return __y.base() - __x.base(); 748} 749#endif 750 751template <class _Iter> 752inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 753reverse_iterator<_Iter> 754operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 755{ 756 return reverse_iterator<_Iter>(__x.base() - __n); 757} 758 759#if _LIBCPP_STD_VER > 11 760template <class _Iter> 761inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 762reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 763{ 764 return reverse_iterator<_Iter>(__i); 765} 766#endif 767 768template <class _Container> 769class _LIBCPP_TEMPLATE_VIS back_insert_iterator 770 : public iterator<output_iterator_tag, 771 void, 772 void, 773 void, 774 void> 775{ 776protected: 777 _Container* container; 778public: 779 typedef _Container container_type; 780 781 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 782 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(const typename _Container::value_type& __value_) 783 {container->push_back(__value_); return *this;} 784#ifndef _LIBCPP_CXX03_LANG 785 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator=(typename _Container::value_type&& __value_) 786 {container->push_back(_VSTD::move(__value_)); return *this;} 787#endif // _LIBCPP_CXX03_LANG 788 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator*() {return *this;} 789 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator& operator++() {return *this;} 790 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 back_insert_iterator operator++(int) {return *this;} 791}; 792 793template <class _Container> 794inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 795back_insert_iterator<_Container> 796back_inserter(_Container& __x) 797{ 798 return back_insert_iterator<_Container>(__x); 799} 800 801template <class _Container> 802class _LIBCPP_TEMPLATE_VIS front_insert_iterator 803 : public iterator<output_iterator_tag, 804 void, 805 void, 806 void, 807 void> 808{ 809protected: 810 _Container* container; 811public: 812 typedef _Container container_type; 813 814 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 815 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) 816 {container->push_front(__value_); return *this;} 817#ifndef _LIBCPP_CXX03_LANG 818 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) 819 {container->push_front(_VSTD::move(__value_)); return *this;} 820#endif // _LIBCPP_CXX03_LANG 821 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator*() {return *this;} 822 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator++() {return *this;} 823 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator operator++(int) {return *this;} 824}; 825 826template <class _Container> 827inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 828front_insert_iterator<_Container> 829front_inserter(_Container& __x) 830{ 831 return front_insert_iterator<_Container>(__x); 832} 833 834template <class _Container> 835class _LIBCPP_TEMPLATE_VIS insert_iterator 836 : public iterator<output_iterator_tag, 837 void, 838 void, 839 void, 840 void> 841{ 842protected: 843 _Container* container; 844 typename _Container::iterator iter; 845public: 846 typedef _Container container_type; 847 848 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator(_Container& __x, typename _Container::iterator __i) 849 : container(_VSTD::addressof(__x)), iter(__i) {} 850 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(const typename _Container::value_type& __value_) 851 {iter = container->insert(iter, __value_); ++iter; return *this;} 852#ifndef _LIBCPP_CXX03_LANG 853 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator=(typename _Container::value_type&& __value_) 854 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 855#endif // _LIBCPP_CXX03_LANG 856 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator*() {return *this;} 857 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++() {return *this;} 858 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 insert_iterator& operator++(int) {return *this;} 859}; 860 861template <class _Container> 862inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 863insert_iterator<_Container> 864inserter(_Container& __x, typename _Container::iterator __i) 865{ 866 return insert_iterator<_Container>(__x, __i); 867} 868 869template <class _Tp, class _CharT = char, 870 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 871class _LIBCPP_TEMPLATE_VIS istream_iterator 872 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 873{ 874public: 875 typedef _CharT char_type; 876 typedef _Traits traits_type; 877 typedef basic_istream<_CharT,_Traits> istream_type; 878private: 879 istream_type* __in_stream_; 880 _Tp __value_; 881public: 882 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 883 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 884 { 885 if (!(*__in_stream_ >> __value_)) 886 __in_stream_ = nullptr; 887 } 888 889 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 890 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 891 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 892 { 893 if (!(*__in_stream_ >> __value_)) 894 __in_stream_ = nullptr; 895 return *this; 896 } 897 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 898 {istream_iterator __t(*this); ++(*this); return __t;} 899 900 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 901 friend _LIBCPP_INLINE_VISIBILITY 902 bool 903 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 904 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 905 906 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 907 friend _LIBCPP_INLINE_VISIBILITY 908 bool 909 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 910 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 911}; 912 913template <class _Tp, class _CharT, class _Traits, class _Distance> 914inline _LIBCPP_INLINE_VISIBILITY 915bool 916operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 917 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 918{ 919 return __x.__in_stream_ == __y.__in_stream_; 920} 921 922template <class _Tp, class _CharT, class _Traits, class _Distance> 923inline _LIBCPP_INLINE_VISIBILITY 924bool 925operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 926 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 927{ 928 return !(__x == __y); 929} 930 931template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 932class _LIBCPP_TEMPLATE_VIS ostream_iterator 933 : public iterator<output_iterator_tag, void, void, void, void> 934{ 935public: 936 typedef output_iterator_tag iterator_category; 937 typedef void value_type; 938#if _LIBCPP_STD_VER > 17 939 typedef std::ptrdiff_t difference_type; 940#else 941 typedef void difference_type; 942#endif 943 typedef void pointer; 944 typedef void reference; 945 typedef _CharT char_type; 946 typedef _Traits traits_type; 947 typedef basic_ostream<_CharT, _Traits> ostream_type; 948 949private: 950 ostream_type* __out_stream_; 951 const char_type* __delim_; 952public: 953 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 954 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 955 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 956 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 957 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 958 { 959 *__out_stream_ << __value_; 960 if (__delim_) 961 *__out_stream_ << __delim_; 962 return *this; 963 } 964 965 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 966 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 967 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 968}; 969 970template<class _CharT, class _Traits> 971class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 972 : public iterator<input_iterator_tag, _CharT, 973 typename _Traits::off_type, _CharT*, 974 _CharT> 975{ 976public: 977 typedef _CharT char_type; 978 typedef _Traits traits_type; 979 typedef typename _Traits::int_type int_type; 980 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 981 typedef basic_istream<_CharT,_Traits> istream_type; 982private: 983 mutable streambuf_type* __sbuf_; 984 985 class __proxy 986 { 987 char_type __keep_; 988 streambuf_type* __sbuf_; 989 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 990 : __keep_(__c), __sbuf_(__s) {} 991 friend class istreambuf_iterator; 992 public: 993 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 994 }; 995 996 _LIBCPP_INLINE_VISIBILITY 997 bool __test_for_eof() const 998 { 999 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1000 __sbuf_ = nullptr; 1001 return __sbuf_ == nullptr; 1002 } 1003public: 1004 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 1005 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1006 : __sbuf_(__s.rdbuf()) {} 1007 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1008 : __sbuf_(__s) {} 1009 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1010 : __sbuf_(__p.__sbuf_) {} 1011 1012 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1013 {return static_cast<char_type>(__sbuf_->sgetc());} 1014 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1015 { 1016 __sbuf_->sbumpc(); 1017 return *this; 1018 } 1019 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1020 { 1021 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1022 } 1023 1024 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1025 {return __test_for_eof() == __b.__test_for_eof();} 1026}; 1027 1028template <class _CharT, class _Traits> 1029inline _LIBCPP_INLINE_VISIBILITY 1030bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1031 const istreambuf_iterator<_CharT,_Traits>& __b) 1032 {return __a.equal(__b);} 1033 1034template <class _CharT, class _Traits> 1035inline _LIBCPP_INLINE_VISIBILITY 1036bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1037 const istreambuf_iterator<_CharT,_Traits>& __b) 1038 {return !__a.equal(__b);} 1039 1040template <class _CharT, class _Traits> 1041class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1042 : public iterator<output_iterator_tag, void, void, void, void> 1043{ 1044public: 1045 typedef output_iterator_tag iterator_category; 1046 typedef void value_type; 1047#if _LIBCPP_STD_VER > 17 1048 typedef std::ptrdiff_t difference_type; 1049#else 1050 typedef void difference_type; 1051#endif 1052 typedef void pointer; 1053 typedef void reference; 1054 typedef _CharT char_type; 1055 typedef _Traits traits_type; 1056 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1057 typedef basic_ostream<_CharT, _Traits> ostream_type; 1058 1059private: 1060 streambuf_type* __sbuf_; 1061public: 1062 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1063 : __sbuf_(__s.rdbuf()) {} 1064 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1065 : __sbuf_(__s) {} 1066 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1067 { 1068 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1069 __sbuf_ = nullptr; 1070 return *this; 1071 } 1072 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1073 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1074 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1075 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1076 1077 template <class _Ch, class _Tr> 1078 friend 1079 _LIBCPP_HIDDEN 1080 ostreambuf_iterator<_Ch, _Tr> 1081 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1082 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1083 ios_base& __iob, _Ch __fl); 1084}; 1085 1086template <class _Iter> 1087class _LIBCPP_TEMPLATE_VIS move_iterator 1088{ 1089private: 1090 _Iter __i; 1091public: 1092 typedef _Iter iterator_type; 1093 typedef typename iterator_traits<iterator_type>::value_type value_type; 1094 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1095 typedef iterator_type pointer; 1096 typedef _If<__is_cpp17_random_access_iterator<_Iter>::value, 1097 random_access_iterator_tag, 1098 typename iterator_traits<_Iter>::iterator_category> iterator_category; 1099#if _LIBCPP_STD_VER > 17 1100 typedef input_iterator_tag iterator_concept; 1101#endif 1102 1103#ifndef _LIBCPP_CXX03_LANG 1104 typedef typename iterator_traits<iterator_type>::reference __reference; 1105 typedef typename conditional< 1106 is_reference<__reference>::value, 1107 typename remove_reference<__reference>::type&&, 1108 __reference 1109 >::type reference; 1110#else 1111 typedef typename iterator_traits<iterator_type>::reference reference; 1112#endif 1113 1114 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1115 move_iterator() : __i() {} 1116 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1117 explicit move_iterator(_Iter __x) : __i(__x) {} 1118 template <class _Up> 1119 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1120 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1121 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1122 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1123 reference operator*() const { return static_cast<reference>(*__i); } 1124 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1125 pointer operator->() const { return __i;} 1126 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1127 move_iterator& operator++() {++__i; return *this;} 1128 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1129 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1130 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1131 move_iterator& operator--() {--__i; return *this;} 1132 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1133 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1134 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1135 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1136 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1137 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1138 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1139 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1140 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1141 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1142 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1143 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 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 1178template <class _Iter1, class _Iter2> 1179inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1180bool 1181operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1182{ 1183 return __x.base() >= __y.base(); 1184} 1185 1186template <class _Iter1, class _Iter2> 1187inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1188bool 1189operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1190{ 1191 return __x.base() <= __y.base(); 1192} 1193 1194#ifndef _LIBCPP_CXX03_LANG 1195template <class _Iter1, class _Iter2> 1196inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1197auto 1198operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1199-> decltype(__x.base() - __y.base()) 1200{ 1201 return __x.base() - __y.base(); 1202} 1203#else 1204template <class _Iter1, class _Iter2> 1205inline _LIBCPP_INLINE_VISIBILITY 1206typename move_iterator<_Iter1>::difference_type 1207operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1208{ 1209 return __x.base() - __y.base(); 1210} 1211#endif 1212 1213template <class _Iter> 1214inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1215move_iterator<_Iter> 1216operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1217{ 1218 return move_iterator<_Iter>(__x.base() + __n); 1219} 1220 1221template <class _Iter> 1222inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1223move_iterator<_Iter> 1224make_move_iterator(_Iter __i) 1225{ 1226 return move_iterator<_Iter>(__i); 1227} 1228 1229// __wrap_iter 1230 1231template <class _Iter> class __wrap_iter; 1232 1233template <class _Iter1, class _Iter2> 1234_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1235bool 1236operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1237 1238template <class _Iter1, class _Iter2> 1239_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1240bool 1241operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1242 1243template <class _Iter1, class _Iter2> 1244_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1245bool 1246operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1247 1248template <class _Iter1, class _Iter2> 1249_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1250bool 1251operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1252 1253template <class _Iter1, class _Iter2> 1254_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1255bool 1256operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1257 1258template <class _Iter1, class _Iter2> 1259_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1260bool 1261operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1262 1263#ifndef _LIBCPP_CXX03_LANG 1264template <class _Iter1, class _Iter2> 1265_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1266auto 1267operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1268-> decltype(__x.base() - __y.base()); 1269#else 1270template <class _Iter1, class _Iter2> 1271_LIBCPP_INLINE_VISIBILITY 1272typename __wrap_iter<_Iter1>::difference_type 1273operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1274#endif 1275 1276template <class _Iter> 1277_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1278__wrap_iter<_Iter> 1279operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1280 1281template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1282template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1283template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1284template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1285 1286template <class _Iter> 1287class __wrap_iter 1288{ 1289public: 1290 typedef _Iter iterator_type; 1291 typedef typename iterator_traits<iterator_type>::value_type value_type; 1292 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1293 typedef typename iterator_traits<iterator_type>::pointer pointer; 1294 typedef typename iterator_traits<iterator_type>::reference reference; 1295 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1296#if _LIBCPP_STD_VER > 17 1297 typedef contiguous_iterator_tag iterator_concept; 1298#endif 1299 1300private: 1301 iterator_type __i; 1302public: 1303 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1304#if _LIBCPP_STD_VER > 11 1305 : __i{} 1306#endif 1307 { 1308#if _LIBCPP_DEBUG_LEVEL == 2 1309 __get_db()->__insert_i(this); 1310#endif 1311 } 1312 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1313 __wrap_iter(const __wrap_iter<_Up>& __u, 1314 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1315 : __i(__u.base()) 1316 { 1317#if _LIBCPP_DEBUG_LEVEL == 2 1318 __get_db()->__iterator_copy(this, &__u); 1319#endif 1320 } 1321#if _LIBCPP_DEBUG_LEVEL == 2 1322 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1323 __wrap_iter(const __wrap_iter& __x) 1324 : __i(__x.base()) 1325 { 1326 __get_db()->__iterator_copy(this, &__x); 1327 } 1328 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1329 __wrap_iter& operator=(const __wrap_iter& __x) 1330 { 1331 if (this != &__x) 1332 { 1333 __get_db()->__iterator_copy(this, &__x); 1334 __i = __x.__i; 1335 } 1336 return *this; 1337 } 1338 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1339 ~__wrap_iter() 1340 { 1341 __get_db()->__erase_i(this); 1342 } 1343#endif 1344 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1345 { 1346#if _LIBCPP_DEBUG_LEVEL == 2 1347 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1348 "Attempted to dereference a non-dereferenceable iterator"); 1349#endif 1350 return *__i; 1351 } 1352 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1353 { 1354#if _LIBCPP_DEBUG_LEVEL == 2 1355 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1356 "Attempted to dereference a non-dereferenceable iterator"); 1357#endif 1358 return _VSTD::__to_address(__i); 1359 } 1360 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1361 { 1362#if _LIBCPP_DEBUG_LEVEL == 2 1363 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1364 "Attempted to increment a non-incrementable iterator"); 1365#endif 1366 ++__i; 1367 return *this; 1368 } 1369 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1370 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1371 1372 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1373 { 1374#if _LIBCPP_DEBUG_LEVEL == 2 1375 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1376 "Attempted to decrement a non-decrementable iterator"); 1377#endif 1378 --__i; 1379 return *this; 1380 } 1381 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1382 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1383 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1384 {__wrap_iter __w(*this); __w += __n; return __w;} 1385 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1386 { 1387#if _LIBCPP_DEBUG_LEVEL == 2 1388 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1389 "Attempted to add/subtract an iterator outside its valid range"); 1390#endif 1391 __i += __n; 1392 return *this; 1393 } 1394 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1395 {return *this + (-__n);} 1396 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1397 {*this += -__n; return *this;} 1398 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1399 { 1400#if _LIBCPP_DEBUG_LEVEL == 2 1401 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1402 "Attempted to subscript an iterator outside its valid range"); 1403#endif 1404 return __i[__n]; 1405 } 1406 1407 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1408 1409private: 1410#if _LIBCPP_DEBUG_LEVEL == 2 1411 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1412 { 1413 __get_db()->__insert_ic(this, __p); 1414 } 1415#else 1416 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1417#endif 1418 1419 template <class _Up> friend class __wrap_iter; 1420 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1421 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1422 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 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 template <class _Iter1, class _Iter2> 1440 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1441 bool 1442 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1443 1444 template <class _Iter1, class _Iter2> 1445 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1446 bool 1447 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1448 1449 template <class _Iter1, class _Iter2> 1450 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1451 bool 1452 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1453 1454#ifndef _LIBCPP_CXX03_LANG 1455 template <class _Iter1, class _Iter2> 1456 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1457 auto 1458 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1459 -> decltype(__x.base() - __y.base()); 1460#else 1461 template <class _Iter1, class _Iter2> 1462 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1463 typename __wrap_iter<_Iter1>::difference_type 1464 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1465#endif 1466 1467 template <class _Iter1> 1468 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1469 __wrap_iter<_Iter1> 1470 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1471}; 1472 1473#if _LIBCPP_STD_VER <= 17 1474template <class _It> 1475struct __is_cpp17_contiguous_iterator<__wrap_iter<_It> > : true_type {}; 1476#endif 1477 1478template <class _Iter> 1479_LIBCPP_CONSTEXPR 1480decltype(_VSTD::__to_address(declval<_Iter>())) 1481__to_address(__wrap_iter<_Iter> __w) _NOEXCEPT { 1482 return _VSTD::__to_address(__w.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 return __x.base() == __y.base(); 1491} 1492 1493template <class _Iter1, class _Iter2> 1494inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1495bool 1496operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1497{ 1498#if _LIBCPP_DEBUG_LEVEL == 2 1499 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1500 "Attempted to compare incomparable iterators"); 1501#endif 1502 return __x.base() < __y.base(); 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 !(__x == __y); 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 __y < __x; 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 !(__x < __y); 1527} 1528 1529template <class _Iter1, class _Iter2> 1530inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1531bool 1532operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1533{ 1534 return !(__y < __x); 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 !(__x == __y); 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 __y < __x; 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 !(__x < __y); 1559} 1560 1561template <class _Iter1> 1562inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1563bool 1564operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1565{ 1566 return !(__y < __x); 1567} 1568 1569#ifndef _LIBCPP_CXX03_LANG 1570template <class _Iter1, class _Iter2> 1571inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1572auto 1573operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1574-> decltype(__x.base() - __y.base()) 1575{ 1576#if _LIBCPP_DEBUG_LEVEL == 2 1577 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1578 "Attempted to subtract incompatible iterators"); 1579#endif 1580 return __x.base() - __y.base(); 1581} 1582#else 1583template <class _Iter1, class _Iter2> 1584inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1585typename __wrap_iter<_Iter1>::difference_type 1586operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1587{ 1588#if _LIBCPP_DEBUG_LEVEL == 2 1589 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1590 "Attempted to subtract incompatible iterators"); 1591#endif 1592 return __x.base() - __y.base(); 1593} 1594#endif 1595 1596template <class _Iter> 1597inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1598__wrap_iter<_Iter> 1599operator+(typename __wrap_iter<_Iter>::difference_type __n, 1600 __wrap_iter<_Iter> __x) _NOEXCEPT 1601{ 1602 __x += __n; 1603 return __x; 1604} 1605 1606template <class _Tp, size_t _Np> 1607_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1608_Tp* 1609begin(_Tp (&__array)[_Np]) 1610{ 1611 return __array; 1612} 1613 1614template <class _Tp, size_t _Np> 1615_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1616_Tp* 1617end(_Tp (&__array)[_Np]) 1618{ 1619 return __array + _Np; 1620} 1621 1622#if !defined(_LIBCPP_CXX03_LANG) 1623 1624template <class _Cp> 1625_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1626auto 1627begin(_Cp& __c) -> decltype(__c.begin()) 1628{ 1629 return __c.begin(); 1630} 1631 1632template <class _Cp> 1633_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1634auto 1635begin(const _Cp& __c) -> decltype(__c.begin()) 1636{ 1637 return __c.begin(); 1638} 1639 1640template <class _Cp> 1641_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1642auto 1643end(_Cp& __c) -> decltype(__c.end()) 1644{ 1645 return __c.end(); 1646} 1647 1648template <class _Cp> 1649_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1650auto 1651end(const _Cp& __c) -> decltype(__c.end()) 1652{ 1653 return __c.end(); 1654} 1655 1656#if _LIBCPP_STD_VER > 11 1657 1658template <class _Tp, size_t _Np> 1659_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1660reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1661{ 1662 return reverse_iterator<_Tp*>(__array + _Np); 1663} 1664 1665template <class _Tp, size_t _Np> 1666_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1667reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1668{ 1669 return reverse_iterator<_Tp*>(__array); 1670} 1671 1672template <class _Ep> 1673_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1674reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1675{ 1676 return reverse_iterator<const _Ep*>(__il.end()); 1677} 1678 1679template <class _Ep> 1680_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1681reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1682{ 1683 return reverse_iterator<const _Ep*>(__il.begin()); 1684} 1685 1686template <class _Cp> 1687_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1688auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1689{ 1690 return _VSTD::begin(__c); 1691} 1692 1693template <class _Cp> 1694_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1695auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1696{ 1697 return _VSTD::end(__c); 1698} 1699 1700template <class _Cp> 1701_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1702auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1703{ 1704 return __c.rbegin(); 1705} 1706 1707template <class _Cp> 1708_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1709auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1710{ 1711 return __c.rbegin(); 1712} 1713 1714template <class _Cp> 1715_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1716auto rend(_Cp& __c) -> decltype(__c.rend()) 1717{ 1718 return __c.rend(); 1719} 1720 1721template <class _Cp> 1722_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1723auto rend(const _Cp& __c) -> decltype(__c.rend()) 1724{ 1725 return __c.rend(); 1726} 1727 1728template <class _Cp> 1729_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1730auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1731{ 1732 return _VSTD::rbegin(__c); 1733} 1734 1735template <class _Cp> 1736_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1737auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1738{ 1739 return _VSTD::rend(__c); 1740} 1741 1742#endif 1743 1744 1745#else // defined(_LIBCPP_CXX03_LANG) 1746 1747template <class _Cp> 1748_LIBCPP_INLINE_VISIBILITY 1749typename _Cp::iterator 1750begin(_Cp& __c) 1751{ 1752 return __c.begin(); 1753} 1754 1755template <class _Cp> 1756_LIBCPP_INLINE_VISIBILITY 1757typename _Cp::const_iterator 1758begin(const _Cp& __c) 1759{ 1760 return __c.begin(); 1761} 1762 1763template <class _Cp> 1764_LIBCPP_INLINE_VISIBILITY 1765typename _Cp::iterator 1766end(_Cp& __c) 1767{ 1768 return __c.end(); 1769} 1770 1771template <class _Cp> 1772_LIBCPP_INLINE_VISIBILITY 1773typename _Cp::const_iterator 1774end(const _Cp& __c) 1775{ 1776 return __c.end(); 1777} 1778 1779#endif // !defined(_LIBCPP_CXX03_LANG) 1780 1781#if _LIBCPP_STD_VER > 14 1782 1783// #if _LIBCPP_STD_VER > 11 1784// template <> 1785// struct _LIBCPP_TEMPLATE_VIS plus<void> 1786// { 1787// template <class _T1, class _T2> 1788// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1789// auto operator()(_T1&& __t, _T2&& __u) const 1790// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1791// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1792// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1793// typedef void is_transparent; 1794// }; 1795// #endif 1796 1797template <class _Cont> 1798_LIBCPP_INLINE_VISIBILITY 1799constexpr auto size(const _Cont& __c) 1800_NOEXCEPT_(noexcept(__c.size())) 1801-> decltype (__c.size()) 1802{ return __c.size(); } 1803 1804template <class _Tp, size_t _Sz> 1805_LIBCPP_INLINE_VISIBILITY 1806constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1807 1808#if _LIBCPP_STD_VER > 17 1809template <class _Cont> 1810_LIBCPP_INLINE_VISIBILITY 1811constexpr auto ssize(const _Cont& __c) 1812_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1813-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1814{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1815 1816template <class _Tp, ptrdiff_t _Sz> 1817_LIBCPP_INLINE_VISIBILITY 1818constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1819#endif 1820 1821template <class _Cont> 1822_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1823constexpr auto empty(const _Cont& __c) 1824_NOEXCEPT_(noexcept(__c.empty())) 1825-> decltype (__c.empty()) 1826{ return __c.empty(); } 1827 1828template <class _Tp, size_t _Sz> 1829_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1830constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1831 1832template <class _Ep> 1833_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1834constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1835 1836template <class _Cont> constexpr 1837_LIBCPP_INLINE_VISIBILITY 1838auto data(_Cont& __c) 1839_NOEXCEPT_(noexcept(__c.data())) 1840-> decltype (__c.data()) 1841{ return __c.data(); } 1842 1843template <class _Cont> constexpr 1844_LIBCPP_INLINE_VISIBILITY 1845auto data(const _Cont& __c) 1846_NOEXCEPT_(noexcept(__c.data())) 1847-> decltype (__c.data()) 1848{ return __c.data(); } 1849 1850template <class _Tp, size_t _Sz> 1851_LIBCPP_INLINE_VISIBILITY 1852constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1853 1854template <class _Ep> 1855_LIBCPP_INLINE_VISIBILITY 1856constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1857#endif 1858 1859template <class _Container, class _Predicate> 1860typename _Container::size_type 1861__libcpp_erase_if_container(_Container& __c, _Predicate& __pred) { 1862 typename _Container::size_type __old_size = __c.size(); 1863 1864 const typename _Container::iterator __last = __c.end(); 1865 for (typename _Container::iterator __iter = __c.begin(); __iter != __last;) { 1866 if (__pred(*__iter)) 1867 __iter = __c.erase(__iter); 1868 else 1869 ++__iter; 1870 } 1871 1872 return __old_size - __c.size(); 1873} 1874 1875_LIBCPP_END_NAMESPACE_STD 1876 1877#endif // _LIBCPP_ITERATOR 1878