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 16namespace std 17{ 18 19template<class Iterator> 20struct iterator_traits 21{ 22 typedef typename Iterator::difference_type difference_type; 23 typedef typename Iterator::value_type value_type; 24 typedef typename Iterator::pointer pointer; 25 typedef typename Iterator::reference reference; 26 typedef typename Iterator::iterator_category iterator_category; 27}; 28 29template<class T> 30struct iterator_traits<T*> 31{ 32 typedef ptrdiff_t difference_type; 33 typedef T value_type; 34 typedef T* pointer; 35 typedef T& reference; 36 typedef random_access_iterator_tag iterator_category; 37}; 38 39template<class Category, class T, class Distance = ptrdiff_t, 40 class Pointer = T*, class Reference = T&> 41struct iterator 42{ 43 typedef T value_type; 44 typedef Distance difference_type; 45 typedef Pointer pointer; 46 typedef Reference reference; 47 typedef Category iterator_category; 48}; 49 50struct input_iterator_tag {}; 51struct output_iterator_tag {}; 52struct forward_iterator_tag : public input_iterator_tag {}; 53struct bidirectional_iterator_tag : public forward_iterator_tag {}; 54struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 55 56// 27.4.3, iterator operations 57template <class InputIterator, class Distance> // constexpr in C++17 58 constexpr void advance(InputIterator& i, Distance n); 59 60template <class InputIterator> // constexpr in C++17 61 constexpr typename iterator_traits<InputIterator>::difference_type 62 distance(InputIterator first, InputIterator last); 63 64template <class InputIterator> // constexpr in C++17 65 constexpr InputIterator next(InputIterator x, 66typename iterator_traits<InputIterator>::difference_type n = 1); 67 68template <class BidirectionalIterator> // constexpr in C++17 69 constexpr BidirectionalIterator prev(BidirectionalIterator x, 70 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 71 72template <class Iterator> 73class reverse_iterator 74 : public iterator<typename iterator_traits<Iterator>::iterator_category, 75 typename iterator_traits<Iterator>::value_type, 76 typename iterator_traits<Iterator>::difference_type, 77 typename iterator_traits<Iterator>::pointer, 78 typename iterator_traits<Iterator>::reference> 79{ 80protected: 81 Iterator current; 82public: 83 typedef Iterator iterator_type; 84 typedef typename iterator_traits<Iterator>::difference_type difference_type; 85 typedef typename iterator_traits<Iterator>::reference reference; 86 typedef typename iterator_traits<Iterator>::pointer pointer; 87 88 constexpr reverse_iterator(); 89 constexpr explicit reverse_iterator(Iterator x); 90 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 91 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 92 constexpr Iterator base() const; 93 constexpr reference operator*() const; 94 constexpr pointer operator->() const; 95 constexpr reverse_iterator& operator++(); 96 constexpr reverse_iterator operator++(int); 97 constexpr reverse_iterator& operator--(); 98 constexpr reverse_iterator operator--(int); 99 constexpr reverse_iterator operator+ (difference_type n) const; 100 constexpr reverse_iterator& operator+=(difference_type n); 101 constexpr reverse_iterator operator- (difference_type n) const; 102 constexpr reverse_iterator& operator-=(difference_type n); 103 constexpr reference operator[](difference_type n) const; 104}; 105 106template <class Iterator1, class Iterator2> 107constexpr bool // constexpr in C++17 108operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 109 110template <class Iterator1, class Iterator2> 111constexpr bool // constexpr in C++17 112operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 113 114template <class Iterator1, class Iterator2> 115constexpr bool // constexpr in C++17 116operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 117 118template <class Iterator1, class Iterator2> 119constexpr bool // constexpr in C++17 120operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 121 122template <class Iterator1, class Iterator2> 123constexpr bool // constexpr in C++17 124operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 125 126template <class Iterator1, class Iterator2> 127constexpr bool // constexpr in C++17 128operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 129 130template <class Iterator1, class Iterator2> 131constexpr auto 132operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 133-> decltype(__y.base() - __x.base()); // constexpr in C++17 134 135template <class Iterator> 136constexpr reverse_iterator<Iterator> 137operator+(typename reverse_iterator<Iterator>::difference_type n, 138 const reverse_iterator<Iterator>& x); // constexpr in C++17 139 140template <class Iterator> 141constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 142 143template <class Container> 144class back_insert_iterator 145{ 146protected: 147 Container* container; 148public: 149 typedef Container container_type; 150 typedef void value_type; 151 typedef void difference_type; 152 typedef void reference; 153 typedef void pointer; 154 155 explicit back_insert_iterator(Container& x); 156 back_insert_iterator& operator=(const typename Container::value_type& value); 157 back_insert_iterator& operator*(); 158 back_insert_iterator& operator++(); 159 back_insert_iterator operator++(int); 160}; 161 162template <class Container> back_insert_iterator<Container> back_inserter(Container& x); 163 164template <class Container> 165class front_insert_iterator 166{ 167protected: 168 Container* container; 169public: 170 typedef Container container_type; 171 typedef void value_type; 172 typedef void difference_type; 173 typedef void reference; 174 typedef void pointer; 175 176 explicit front_insert_iterator(Container& x); 177 front_insert_iterator& operator=(const typename Container::value_type& value); 178 front_insert_iterator& operator*(); 179 front_insert_iterator& operator++(); 180 front_insert_iterator operator++(int); 181}; 182 183template <class Container> front_insert_iterator<Container> front_inserter(Container& x); 184 185template <class Container> 186class insert_iterator 187{ 188protected: 189 Container* container; 190 typename Container::iterator iter; 191public: 192 typedef Container container_type; 193 typedef void value_type; 194 typedef void difference_type; 195 typedef void reference; 196 typedef void pointer; 197 198 insert_iterator(Container& x, typename Container::iterator i); 199 insert_iterator& operator=(const typename Container::value_type& value); 200 insert_iterator& operator*(); 201 insert_iterator& operator++(); 202 insert_iterator& operator++(int); 203}; 204 205template <class Container, class Iterator> 206insert_iterator<Container> inserter(Container& x, Iterator i); 207 208template <class Iterator> 209class move_iterator { 210public: 211 typedef Iterator iterator_type; 212 typedef typename iterator_traits<Iterator>::difference_type difference_type; 213 typedef Iterator pointer; 214 typedef typename iterator_traits<Iterator>::value_type value_type; 215 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 216 typedef value_type&& reference; 217 218 constexpr move_iterator(); // all the constexprs are in C++17 219 constexpr explicit move_iterator(Iterator i); 220 template <class U> 221 constexpr move_iterator(const move_iterator<U>& u); 222 template <class U> 223 constexpr move_iterator& operator=(const move_iterator<U>& u); 224 constexpr iterator_type base() const; 225 constexpr reference operator*() const; 226 constexpr pointer operator->() const; 227 constexpr move_iterator& operator++(); 228 constexpr move_iterator operator++(int); 229 constexpr move_iterator& operator--(); 230 constexpr move_iterator operator--(int); 231 constexpr move_iterator operator+(difference_type n) const; 232 constexpr move_iterator& operator+=(difference_type n); 233 constexpr move_iterator operator-(difference_type n) const; 234 constexpr move_iterator& operator-=(difference_type n); 235 constexpr unspecified operator[](difference_type n) const; 236private: 237 Iterator current; // exposition only 238}; 239 240template <class Iterator1, class Iterator2> 241constexpr bool // constexpr in C++17 242operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 243 244template <class Iterator1, class Iterator2> 245constexpr bool // constexpr in C++17 246operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 247 248template <class Iterator1, class Iterator2> 249constexpr bool // constexpr in C++17 250operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 251 252template <class Iterator1, class Iterator2> 253constexpr bool // constexpr in C++17 254operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 255 256template <class Iterator1, class Iterator2> 257constexpr bool // constexpr in C++17 258operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 259 260template <class Iterator1, class Iterator2> 261constexpr bool // constexpr in C++17 262operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 263 264template <class Iterator1, class Iterator2> 265constexpr auto // constexpr in C++17 266operator-(const move_iterator<Iterator1>& x, 267 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 268 269template <class Iterator> 270constexpr move_iterator<Iterator> operator+( // constexpr in C++17 271 typename move_iterator<Iterator>::difference_type n, 272 const move_iterator<Iterator>& x); 273 274template <class Iterator> // constexpr in C++17 275constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 276 277 278template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 279class istream_iterator 280 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> 281{ 282public: 283 typedef charT char_type; 284 typedef traits traits_type; 285 typedef basic_istream<charT,traits> istream_type; 286 287 constexpr istream_iterator(); 288 istream_iterator(istream_type& s); 289 istream_iterator(const istream_iterator& x); 290 ~istream_iterator(); 291 292 const T& operator*() const; 293 const T* operator->() const; 294 istream_iterator& operator++(); 295 istream_iterator operator++(int); 296}; 297 298template <class T, class charT, class traits, class Distance> 299bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 300 const istream_iterator<T,charT,traits,Distance>& y); 301template <class T, class charT, class traits, class Distance> 302bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 303 const istream_iterator<T,charT,traits,Distance>& y); 304 305template <class T, class charT = char, class traits = char_traits<charT> > 306class ostream_iterator 307 : public iterator<output_iterator_tag, void, void, void ,void> 308{ 309public: 310 typedef charT char_type; 311 typedef traits traits_type; 312 typedef basic_ostream<charT,traits> ostream_type; 313 314 ostream_iterator(ostream_type& s); 315 ostream_iterator(ostream_type& s, const charT* delimiter); 316 ostream_iterator(const ostream_iterator& x); 317 ~ostream_iterator(); 318 ostream_iterator& operator=(const T& value); 319 320 ostream_iterator& operator*(); 321 ostream_iterator& operator++(); 322 ostream_iterator& operator++(int); 323}; 324 325template<class charT, class traits = char_traits<charT> > 326class istreambuf_iterator 327 : public iterator<input_iterator_tag, charT, 328 typename traits::off_type, unspecified, 329 charT> 330{ 331public: 332 typedef charT char_type; 333 typedef traits traits_type; 334 typedef typename traits::int_type int_type; 335 typedef basic_streambuf<charT,traits> streambuf_type; 336 typedef basic_istream<charT,traits> istream_type; 337 338 istreambuf_iterator() noexcept; 339 istreambuf_iterator(istream_type& s) noexcept; 340 istreambuf_iterator(streambuf_type* s) noexcept; 341 istreambuf_iterator(a-private-type) noexcept; 342 343 charT operator*() const; 344 pointer operator->() const; 345 istreambuf_iterator& operator++(); 346 a-private-type operator++(int); 347 348 bool equal(const istreambuf_iterator& b) const; 349}; 350 351template <class charT, class traits> 352bool operator==(const istreambuf_iterator<charT,traits>& a, 353 const istreambuf_iterator<charT,traits>& b); 354template <class charT, class traits> 355bool operator!=(const istreambuf_iterator<charT,traits>& a, 356 const istreambuf_iterator<charT,traits>& b); 357 358template <class charT, class traits = char_traits<charT> > 359class ostreambuf_iterator 360 : public iterator<output_iterator_tag, void, void, void, void> 361{ 362public: 363 typedef charT char_type; 364 typedef traits traits_type; 365 typedef basic_streambuf<charT,traits> streambuf_type; 366 typedef basic_ostream<charT,traits> ostream_type; 367 368 ostreambuf_iterator(ostream_type& s) noexcept; 369 ostreambuf_iterator(streambuf_type* s) noexcept; 370 ostreambuf_iterator& operator=(charT c); 371 ostreambuf_iterator& operator*(); 372 ostreambuf_iterator& operator++(); 373 ostreambuf_iterator& operator++(int); 374 bool failed() const noexcept; 375}; 376 377template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 378template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 379template <class C> constexpr auto end(C& c) -> decltype(c.end()); 380template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 381template <class T, size_t N> constexpr T* begin(T (&array)[N]); 382template <class T, size_t N> constexpr T* end(T (&array)[N]); 383 384template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 385template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 386template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 387template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 388template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 389template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 390template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 391template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 392template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 393template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 394template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 395template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 396 397// 24.8, container access: 398template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 399template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 400 401template <class C> constexpr auto ssize(const C& c) 402 -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 403template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 404 405template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 406template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 407template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 408template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 409template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 410template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 411template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 412 413} // std 414 415*/ 416 417#include <__config> 418#include <iosfwd> // for forward declarations of vector and string. 419#include <__functional_base> 420#include <type_traits> 421#include <cstddef> 422#include <initializer_list> 423#include <version> 424 425#include <__debug> 426 427#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 428#pragma GCC system_header 429#endif 430 431_LIBCPP_BEGIN_NAMESPACE_STD 432template <class _Iter> 433struct _LIBCPP_TEMPLATE_VIS iterator_traits; 434 435struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {}; 436struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {}; 437struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag : public input_iterator_tag {}; 438struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {}; 439struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {}; 440#if _LIBCPP_STD_VER > 17 441// TODO(EricWF) contiguous_iterator_tag is provided as an extension prior to 442// C++20 to allow optimizations for users providing wrapped iterator types. 443struct _LIBCPP_TEMPLATE_VIS contiguous_iterator_tag: public random_access_iterator_tag { }; 444#endif 445 446template <class _Iter> 447struct __iter_traits_cache { 448 using type = _If< 449 __is_primary_template<iterator_traits<_Iter> >::value, 450 _Iter, 451 iterator_traits<_Iter> 452 >; 453}; 454template <class _Iter> 455using _ITER_TRAITS = typename __iter_traits_cache<_Iter>::type; 456 457struct __iter_concept_concept_test { 458 template <class _Iter> 459 using _Apply = typename _ITER_TRAITS<_Iter>::iterator_concept; 460}; 461struct __iter_concept_category_test { 462 template <class _Iter> 463 using _Apply = typename _ITER_TRAITS<_Iter>::iterator_category; 464}; 465struct __iter_concept_random_fallback { 466 template <class _Iter> 467 using _Apply = _EnableIf< 468 __is_primary_template<iterator_traits<_Iter> >::value, 469 random_access_iterator_tag 470 >; 471}; 472 473template <class _Iter, class _Tester> struct __test_iter_concept 474 : _IsValidExpansion<_Tester::template _Apply, _Iter>, 475 _Tester 476{ 477}; 478 479template <class _Iter> 480struct __iter_concept_cache { 481 using type = _Or< 482 __test_iter_concept<_Iter, __iter_concept_concept_test>, 483 __test_iter_concept<_Iter, __iter_concept_category_test>, 484 __test_iter_concept<_Iter, __iter_concept_random_fallback> 485 >; 486}; 487 488template <class _Iter> 489using _ITER_CONCEPT = typename __iter_concept_cache<_Iter>::type::template _Apply<_Iter>; 490 491 492template <class _Tp> 493struct __has_iterator_typedefs 494{ 495private: 496 struct __two {char __lx; char __lxx;}; 497 template <class _Up> static __two __test(...); 498 template <class _Up> static char __test(typename __void_t<typename _Up::iterator_category>::type* = 0, 499 typename __void_t<typename _Up::difference_type>::type* = 0, 500 typename __void_t<typename _Up::value_type>::type* = 0, 501 typename __void_t<typename _Up::reference>::type* = 0, 502 typename __void_t<typename _Up::pointer>::type* = 0); 503public: 504 static const bool value = sizeof(__test<_Tp>(0,0,0,0,0)) == 1; 505}; 506 507 508template <class _Tp> 509struct __has_iterator_category 510{ 511private: 512 struct __two {char __lx; char __lxx;}; 513 template <class _Up> static __two __test(...); 514 template <class _Up> static char __test(typename _Up::iterator_category* = nullptr); 515public: 516 static const bool value = sizeof(__test<_Tp>(nullptr)) == 1; 517}; 518 519template <class _Iter, bool> struct __iterator_traits_impl {}; 520 521template <class _Iter> 522struct __iterator_traits_impl<_Iter, true> 523{ 524 typedef typename _Iter::difference_type difference_type; 525 typedef typename _Iter::value_type value_type; 526 typedef typename _Iter::pointer pointer; 527 typedef typename _Iter::reference reference; 528 typedef typename _Iter::iterator_category iterator_category; 529}; 530 531template <class _Iter, bool> struct __iterator_traits {}; 532 533template <class _Iter> 534struct __iterator_traits<_Iter, true> 535 : __iterator_traits_impl 536 < 537 _Iter, 538 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value || 539 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value 540 > 541{}; 542 543// iterator_traits<Iterator> will only have the nested types if Iterator::iterator_category 544// exists. Else iterator_traits<Iterator> will be an empty class. This is a 545// conforming extension which allows some programs to compile and behave as 546// the client expects instead of failing at compile time. 547 548template <class _Iter> 549struct _LIBCPP_TEMPLATE_VIS iterator_traits 550 : __iterator_traits<_Iter, __has_iterator_typedefs<_Iter>::value> { 551 552 using __primary_template = iterator_traits; 553}; 554 555template<class _Tp> 556struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*> 557{ 558 typedef ptrdiff_t difference_type; 559 typedef typename remove_cv<_Tp>::type value_type; 560 typedef _Tp* pointer; 561 typedef _Tp& reference; 562 typedef random_access_iterator_tag iterator_category; 563#if _LIBCPP_STD_VER > 17 564 typedef contiguous_iterator_tag iterator_concept; 565#endif 566}; 567 568template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value> 569struct __has_iterator_category_convertible_to 570 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value> 571{}; 572 573template <class _Tp, class _Up> 574struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {}; 575 576template <class _Tp> 577struct __is_cpp17_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {}; 578 579template <class _Tp> 580struct __is_cpp17_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {}; 581 582template <class _Tp> 583struct __is_cpp17_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {}; 584 585template <class _Tp> 586struct __is_cpp17_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {}; 587 588#if _LIBCPP_STD_VER > 17 589template <class _Tp> 590struct __is_cpp17_contiguous_iterator : public __has_iterator_category_convertible_to<_Tp, contiguous_iterator_tag> {}; 591#else 592template <class _Tp> 593struct __is_cpp17_contiguous_iterator : public false_type {}; 594#endif 595 596 597template <class _Tp> 598struct __is_exactly_cpp17_input_iterator 599 : public integral_constant<bool, 600 __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && 601 !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; 602 603#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 604template<class _InputIterator> 605using __iter_value_type = typename iterator_traits<_InputIterator>::value_type; 606 607template<class _InputIterator> 608using __iter_key_type = remove_const_t<typename iterator_traits<_InputIterator>::value_type::first_type>; 609 610template<class _InputIterator> 611using __iter_mapped_type = typename iterator_traits<_InputIterator>::value_type::second_type; 612 613template<class _InputIterator> 614using __iter_to_alloc_type = pair< 615 add_const_t<typename iterator_traits<_InputIterator>::value_type::first_type>, 616 typename iterator_traits<_InputIterator>::value_type::second_type>; 617#endif 618 619template<class _Category, class _Tp, class _Distance = ptrdiff_t, 620 class _Pointer = _Tp*, class _Reference = _Tp&> 621struct _LIBCPP_TEMPLATE_VIS iterator 622{ 623 typedef _Tp value_type; 624 typedef _Distance difference_type; 625 typedef _Pointer pointer; 626 typedef _Reference reference; 627 typedef _Category iterator_category; 628}; 629 630template <class _InputIter> 631inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 632void __advance(_InputIter& __i, 633 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 634{ 635 for (; __n > 0; --__n) 636 ++__i; 637} 638 639template <class _BiDirIter> 640inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 641void __advance(_BiDirIter& __i, 642 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 643{ 644 if (__n >= 0) 645 for (; __n > 0; --__n) 646 ++__i; 647 else 648 for (; __n < 0; ++__n) 649 --__i; 650} 651 652template <class _RandIter> 653inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 654void __advance(_RandIter& __i, 655 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 656{ 657 __i += __n; 658} 659 660template <class _InputIter, class _Distance> 661inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 662void advance(_InputIter& __i, _Distance __orig_n) 663{ 664 _LIBCPP_ASSERT(__orig_n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 665 "Attempt to advance(it, n) with negative n on a non-bidirectional iterator"); 666 typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; 667 _IntegralSize __n = __orig_n; 668 _VSTD::__advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 669} 670 671template <class _InputIter> 672inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 673typename iterator_traits<_InputIter>::difference_type 674__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 675{ 676 typename iterator_traits<_InputIter>::difference_type __r(0); 677 for (; __first != __last; ++__first) 678 ++__r; 679 return __r; 680} 681 682template <class _RandIter> 683inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 684typename iterator_traits<_RandIter>::difference_type 685__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 686{ 687 return __last - __first; 688} 689 690template <class _InputIter> 691inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 692typename iterator_traits<_InputIter>::difference_type 693distance(_InputIter __first, _InputIter __last) 694{ 695 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 696} 697 698template <class _InputIter> 699inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 700typename enable_if 701< 702 __is_cpp17_input_iterator<_InputIter>::value, 703 _InputIter 704>::type 705next(_InputIter __x, 706 typename iterator_traits<_InputIter>::difference_type __n = 1) 707{ 708 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 709 "Attempt to next(it, n) with negative n on a non-bidirectional iterator"); 710 711 _VSTD::advance(__x, __n); 712 return __x; 713} 714 715template <class _InputIter> 716inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 717typename enable_if 718< 719 __is_cpp17_input_iterator<_InputIter>::value, 720 _InputIter 721>::type 722prev(_InputIter __x, 723 typename iterator_traits<_InputIter>::difference_type __n = 1) 724{ 725 _LIBCPP_ASSERT(__n <= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 726 "Attempt to prev(it, n) with a positive n on a non-bidirectional iterator"); 727 _VSTD::advance(__x, -__n); 728 return __x; 729} 730 731 732template <class _Tp, class = void> 733struct __is_stashing_iterator : false_type {}; 734 735template <class _Tp> 736struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 737 : true_type {}; 738 739template <class _Iter> 740class _LIBCPP_TEMPLATE_VIS reverse_iterator 741 : public iterator<typename iterator_traits<_Iter>::iterator_category, 742 typename iterator_traits<_Iter>::value_type, 743 typename iterator_traits<_Iter>::difference_type, 744 typename iterator_traits<_Iter>::pointer, 745 typename iterator_traits<_Iter>::reference> 746{ 747private: 748 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 749 750 static_assert(!__is_stashing_iterator<_Iter>::value, 751 "The specified iterator type cannot be used with reverse_iterator; " 752 "Using stashing iterators with reverse_iterator causes undefined behavior"); 753 754protected: 755 _Iter current; 756public: 757 typedef _Iter iterator_type; 758 typedef typename iterator_traits<_Iter>::difference_type difference_type; 759 typedef typename iterator_traits<_Iter>::reference reference; 760 typedef typename iterator_traits<_Iter>::pointer pointer; 761 762 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 763 reverse_iterator() : __t(), current() {} 764 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 765 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 766 template <class _Up> 767 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 768 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 769 template <class _Up> 770 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 771 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 772 { __t = current = __u.base(); return *this; } 773 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 774 _Iter base() const {return current;} 775 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 776 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 777 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 778 pointer operator->() const {return _VSTD::addressof(operator*());} 779 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 780 reverse_iterator& operator++() {--current; return *this;} 781 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 782 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 783 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 784 reverse_iterator& operator--() {++current; return *this;} 785 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 786 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 787 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 788 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 789 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 790 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 791 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 792 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 793 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 794 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 795 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 796 reference operator[](difference_type __n) const {return *(*this + __n);} 797}; 798 799template <class _Iter1, class _Iter2> 800inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 801bool 802operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 803{ 804 return __x.base() == __y.base(); 805} 806 807template <class _Iter1, class _Iter2> 808inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 809bool 810operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 811{ 812 return __x.base() > __y.base(); 813} 814 815template <class _Iter1, class _Iter2> 816inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 817bool 818operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 819{ 820 return __x.base() != __y.base(); 821} 822 823template <class _Iter1, class _Iter2> 824inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 825bool 826operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 827{ 828 return __x.base() < __y.base(); 829} 830 831template <class _Iter1, class _Iter2> 832inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 833bool 834operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 835{ 836 return __x.base() <= __y.base(); 837} 838 839template <class _Iter1, class _Iter2> 840inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 841bool 842operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 843{ 844 return __x.base() >= __y.base(); 845} 846 847#ifndef _LIBCPP_CXX03_LANG 848template <class _Iter1, class _Iter2> 849inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 850auto 851operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 852-> decltype(__y.base() - __x.base()) 853{ 854 return __y.base() - __x.base(); 855} 856#else 857template <class _Iter1, class _Iter2> 858inline _LIBCPP_INLINE_VISIBILITY 859typename reverse_iterator<_Iter1>::difference_type 860operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 861{ 862 return __y.base() - __x.base(); 863} 864#endif 865 866template <class _Iter> 867inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 868reverse_iterator<_Iter> 869operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 870{ 871 return reverse_iterator<_Iter>(__x.base() - __n); 872} 873 874#if _LIBCPP_STD_VER > 11 875template <class _Iter> 876inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 877reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 878{ 879 return reverse_iterator<_Iter>(__i); 880} 881#endif 882 883template <class _Container> 884class _LIBCPP_TEMPLATE_VIS back_insert_iterator 885 : public iterator<output_iterator_tag, 886 void, 887 void, 888 void, 889 void> 890{ 891protected: 892 _Container* container; 893public: 894 typedef _Container container_type; 895 896 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 897 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 898 {container->push_back(__value_); return *this;} 899#ifndef _LIBCPP_CXX03_LANG 900 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 901 {container->push_back(_VSTD::move(__value_)); return *this;} 902#endif // _LIBCPP_CXX03_LANG 903 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 904 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 905 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 906}; 907 908template <class _Container> 909inline _LIBCPP_INLINE_VISIBILITY 910back_insert_iterator<_Container> 911back_inserter(_Container& __x) 912{ 913 return back_insert_iterator<_Container>(__x); 914} 915 916template <class _Container> 917class _LIBCPP_TEMPLATE_VIS front_insert_iterator 918 : public iterator<output_iterator_tag, 919 void, 920 void, 921 void, 922 void> 923{ 924protected: 925 _Container* container; 926public: 927 typedef _Container container_type; 928 929 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 930 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 931 {container->push_front(__value_); return *this;} 932#ifndef _LIBCPP_CXX03_LANG 933 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 934 {container->push_front(_VSTD::move(__value_)); return *this;} 935#endif // _LIBCPP_CXX03_LANG 936 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 937 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 938 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 939}; 940 941template <class _Container> 942inline _LIBCPP_INLINE_VISIBILITY 943front_insert_iterator<_Container> 944front_inserter(_Container& __x) 945{ 946 return front_insert_iterator<_Container>(__x); 947} 948 949template <class _Container> 950class _LIBCPP_TEMPLATE_VIS insert_iterator 951 : public iterator<output_iterator_tag, 952 void, 953 void, 954 void, 955 void> 956{ 957protected: 958 _Container* container; 959 typename _Container::iterator iter; 960public: 961 typedef _Container container_type; 962 963 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 964 : container(_VSTD::addressof(__x)), iter(__i) {} 965 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 966 {iter = container->insert(iter, __value_); ++iter; return *this;} 967#ifndef _LIBCPP_CXX03_LANG 968 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 969 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 970#endif // _LIBCPP_CXX03_LANG 971 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 972 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 973 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 974}; 975 976template <class _Container> 977inline _LIBCPP_INLINE_VISIBILITY 978insert_iterator<_Container> 979inserter(_Container& __x, typename _Container::iterator __i) 980{ 981 return insert_iterator<_Container>(__x, __i); 982} 983 984template <class _Tp, class _CharT = char, 985 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 986class _LIBCPP_TEMPLATE_VIS istream_iterator 987 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 988{ 989public: 990 typedef _CharT char_type; 991 typedef _Traits traits_type; 992 typedef basic_istream<_CharT,_Traits> istream_type; 993private: 994 istream_type* __in_stream_; 995 _Tp __value_; 996public: 997 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 998 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 999 { 1000 if (!(*__in_stream_ >> __value_)) 1001 __in_stream_ = nullptr; 1002 } 1003 1004 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 1005 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 1006 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 1007 { 1008 if (!(*__in_stream_ >> __value_)) 1009 __in_stream_ = nullptr; 1010 return *this; 1011 } 1012 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 1013 {istream_iterator __t(*this); ++(*this); return __t;} 1014 1015 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1016 friend _LIBCPP_INLINE_VISIBILITY 1017 bool 1018 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1019 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1020 1021 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1022 friend _LIBCPP_INLINE_VISIBILITY 1023 bool 1024 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1025 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1026}; 1027 1028template <class _Tp, class _CharT, class _Traits, class _Distance> 1029inline _LIBCPP_INLINE_VISIBILITY 1030bool 1031operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1032 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1033{ 1034 return __x.__in_stream_ == __y.__in_stream_; 1035} 1036 1037template <class _Tp, class _CharT, class _Traits, class _Distance> 1038inline _LIBCPP_INLINE_VISIBILITY 1039bool 1040operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1041 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1042{ 1043 return !(__x == __y); 1044} 1045 1046template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 1047class _LIBCPP_TEMPLATE_VIS ostream_iterator 1048 : public iterator<output_iterator_tag, void, void, void, void> 1049{ 1050public: 1051 typedef output_iterator_tag iterator_category; 1052 typedef void value_type; 1053#if _LIBCPP_STD_VER > 17 1054 typedef std::ptrdiff_t difference_type; 1055#else 1056 typedef void difference_type; 1057#endif 1058 typedef void pointer; 1059 typedef void reference; 1060 typedef _CharT char_type; 1061 typedef _Traits traits_type; 1062 typedef basic_ostream<_CharT, _Traits> ostream_type; 1063 1064private: 1065 ostream_type* __out_stream_; 1066 const char_type* __delim_; 1067public: 1068 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 1069 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 1070 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 1071 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 1072 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1073 { 1074 *__out_stream_ << __value_; 1075 if (__delim_) 1076 *__out_stream_ << __delim_; 1077 return *this; 1078 } 1079 1080 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1081 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1082 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1083}; 1084 1085template<class _CharT, class _Traits> 1086class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1087 : public iterator<input_iterator_tag, _CharT, 1088 typename _Traits::off_type, _CharT*, 1089 _CharT> 1090{ 1091public: 1092 typedef _CharT char_type; 1093 typedef _Traits traits_type; 1094 typedef typename _Traits::int_type int_type; 1095 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1096 typedef basic_istream<_CharT,_Traits> istream_type; 1097private: 1098 mutable streambuf_type* __sbuf_; 1099 1100 class __proxy 1101 { 1102 char_type __keep_; 1103 streambuf_type* __sbuf_; 1104 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1105 : __keep_(__c), __sbuf_(__s) {} 1106 friend class istreambuf_iterator; 1107 public: 1108 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1109 }; 1110 1111 _LIBCPP_INLINE_VISIBILITY 1112 bool __test_for_eof() const 1113 { 1114 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1115 __sbuf_ = nullptr; 1116 return __sbuf_ == nullptr; 1117 } 1118public: 1119 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 1120 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1121 : __sbuf_(__s.rdbuf()) {} 1122 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1123 : __sbuf_(__s) {} 1124 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1125 : __sbuf_(__p.__sbuf_) {} 1126 1127 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1128 {return static_cast<char_type>(__sbuf_->sgetc());} 1129 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1130 { 1131 __sbuf_->sbumpc(); 1132 return *this; 1133 } 1134 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1135 { 1136 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1137 } 1138 1139 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1140 {return __test_for_eof() == __b.__test_for_eof();} 1141}; 1142 1143template <class _CharT, class _Traits> 1144inline _LIBCPP_INLINE_VISIBILITY 1145bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1146 const istreambuf_iterator<_CharT,_Traits>& __b) 1147 {return __a.equal(__b);} 1148 1149template <class _CharT, class _Traits> 1150inline _LIBCPP_INLINE_VISIBILITY 1151bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1152 const istreambuf_iterator<_CharT,_Traits>& __b) 1153 {return !__a.equal(__b);} 1154 1155template <class _CharT, class _Traits> 1156class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1157 : public iterator<output_iterator_tag, void, void, void, void> 1158{ 1159public: 1160 typedef output_iterator_tag iterator_category; 1161 typedef void value_type; 1162#if _LIBCPP_STD_VER > 17 1163 typedef std::ptrdiff_t difference_type; 1164#else 1165 typedef void difference_type; 1166#endif 1167 typedef void pointer; 1168 typedef void reference; 1169 typedef _CharT char_type; 1170 typedef _Traits traits_type; 1171 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1172 typedef basic_ostream<_CharT, _Traits> ostream_type; 1173 1174private: 1175 streambuf_type* __sbuf_; 1176public: 1177 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1178 : __sbuf_(__s.rdbuf()) {} 1179 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1180 : __sbuf_(__s) {} 1181 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1182 { 1183 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1184 __sbuf_ = nullptr; 1185 return *this; 1186 } 1187 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1188 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1189 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1190 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1191 1192 template <class _Ch, class _Tr> 1193 friend 1194 _LIBCPP_HIDDEN 1195 ostreambuf_iterator<_Ch, _Tr> 1196 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1197 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1198 ios_base& __iob, _Ch __fl); 1199}; 1200 1201template <class _Iter> 1202class _LIBCPP_TEMPLATE_VIS move_iterator 1203{ 1204private: 1205 _Iter __i; 1206public: 1207 typedef _Iter iterator_type; 1208 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1209 typedef typename iterator_traits<iterator_type>::value_type value_type; 1210 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1211 typedef iterator_type pointer; 1212#ifndef _LIBCPP_CXX03_LANG 1213 typedef typename iterator_traits<iterator_type>::reference __reference; 1214 typedef typename conditional< 1215 is_reference<__reference>::value, 1216 typename remove_reference<__reference>::type&&, 1217 __reference 1218 >::type reference; 1219#else 1220 typedef typename iterator_traits<iterator_type>::reference reference; 1221#endif 1222 1223 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1224 move_iterator() : __i() {} 1225 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1226 explicit move_iterator(_Iter __x) : __i(__x) {} 1227 template <class _Up> 1228 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1229 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1230 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1231 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1232 reference operator*() const { return static_cast<reference>(*__i); } 1233 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1234 pointer operator->() const { return __i;} 1235 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1236 move_iterator& operator++() {++__i; return *this;} 1237 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1238 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1239 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1240 move_iterator& operator--() {--__i; return *this;} 1241 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1242 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1243 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1244 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1245 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1246 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1247 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1248 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1249 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1250 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1251 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1252 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1253}; 1254 1255template <class _Iter1, class _Iter2> 1256inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1257bool 1258operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1259{ 1260 return __x.base() == __y.base(); 1261} 1262 1263template <class _Iter1, class _Iter2> 1264inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1265bool 1266operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1267{ 1268 return __x.base() < __y.base(); 1269} 1270 1271template <class _Iter1, class _Iter2> 1272inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1273bool 1274operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1275{ 1276 return __x.base() != __y.base(); 1277} 1278 1279template <class _Iter1, class _Iter2> 1280inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1281bool 1282operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1283{ 1284 return __x.base() > __y.base(); 1285} 1286 1287template <class _Iter1, class _Iter2> 1288inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1289bool 1290operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1291{ 1292 return __x.base() >= __y.base(); 1293} 1294 1295template <class _Iter1, class _Iter2> 1296inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1297bool 1298operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1299{ 1300 return __x.base() <= __y.base(); 1301} 1302 1303#ifndef _LIBCPP_CXX03_LANG 1304template <class _Iter1, class _Iter2> 1305inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1306auto 1307operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1308-> decltype(__x.base() - __y.base()) 1309{ 1310 return __x.base() - __y.base(); 1311} 1312#else 1313template <class _Iter1, class _Iter2> 1314inline _LIBCPP_INLINE_VISIBILITY 1315typename move_iterator<_Iter1>::difference_type 1316operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1317{ 1318 return __x.base() - __y.base(); 1319} 1320#endif 1321 1322template <class _Iter> 1323inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1324move_iterator<_Iter> 1325operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1326{ 1327 return move_iterator<_Iter>(__x.base() + __n); 1328} 1329 1330template <class _Iter> 1331inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1332move_iterator<_Iter> 1333make_move_iterator(_Iter __i) 1334{ 1335 return move_iterator<_Iter>(__i); 1336} 1337 1338// __wrap_iter 1339 1340template <class _Iter> class __wrap_iter; 1341 1342template <class _Iter1, class _Iter2> 1343_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1344bool 1345operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1346 1347template <class _Iter1, class _Iter2> 1348_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1349bool 1350operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1351 1352template <class _Iter1, class _Iter2> 1353_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1354bool 1355operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1356 1357template <class _Iter1, class _Iter2> 1358_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1359bool 1360operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1361 1362template <class _Iter1, class _Iter2> 1363_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1364bool 1365operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1366 1367template <class _Iter1, class _Iter2> 1368_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1369bool 1370operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1371 1372#ifndef _LIBCPP_CXX03_LANG 1373template <class _Iter1, class _Iter2> 1374_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1375auto 1376operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1377-> decltype(__x.base() - __y.base()); 1378#else 1379template <class _Iter1, class _Iter2> 1380_LIBCPP_INLINE_VISIBILITY 1381typename __wrap_iter<_Iter1>::difference_type 1382operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1383#endif 1384 1385template <class _Iter> 1386_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1387__wrap_iter<_Iter> 1388operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1389 1390template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1391template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1392template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1393template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1394 1395#if _LIBCPP_DEBUG_LEVEL < 2 1396 1397template <class _Tp> 1398_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1399typename enable_if 1400< 1401 is_trivially_copy_assignable<_Tp>::value, 1402 _Tp* 1403>::type 1404__unwrap_iter(__wrap_iter<_Tp*>); 1405 1406#else 1407 1408template <class _Tp> 1409inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1410typename enable_if 1411< 1412 is_trivially_copy_assignable<_Tp>::value, 1413 __wrap_iter<_Tp*> 1414>::type 1415__unwrap_iter(__wrap_iter<_Tp*> __i); 1416 1417#endif 1418 1419template <class _Iter> 1420class __wrap_iter 1421{ 1422public: 1423 typedef _Iter iterator_type; 1424 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1425 typedef typename iterator_traits<iterator_type>::value_type value_type; 1426 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1427 typedef typename iterator_traits<iterator_type>::pointer pointer; 1428 typedef typename iterator_traits<iterator_type>::reference reference; 1429private: 1430 iterator_type __i; 1431public: 1432 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1433#if _LIBCPP_STD_VER > 11 1434 : __i{} 1435#endif 1436 { 1437#if _LIBCPP_DEBUG_LEVEL == 2 1438 __get_db()->__insert_i(this); 1439#endif 1440 } 1441 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1442 __wrap_iter(const __wrap_iter<_Up>& __u, 1443 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1444 : __i(__u.base()) 1445 { 1446#if _LIBCPP_DEBUG_LEVEL == 2 1447 __get_db()->__iterator_copy(this, &__u); 1448#endif 1449 } 1450#if _LIBCPP_DEBUG_LEVEL == 2 1451 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1452 __wrap_iter(const __wrap_iter& __x) 1453 : __i(__x.base()) 1454 { 1455 __get_db()->__iterator_copy(this, &__x); 1456 } 1457 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1458 __wrap_iter& operator=(const __wrap_iter& __x) 1459 { 1460 if (this != &__x) 1461 { 1462 __get_db()->__iterator_copy(this, &__x); 1463 __i = __x.__i; 1464 } 1465 return *this; 1466 } 1467 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1468 ~__wrap_iter() 1469 { 1470 __get_db()->__erase_i(this); 1471 } 1472#endif 1473 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1474 { 1475#if _LIBCPP_DEBUG_LEVEL == 2 1476 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1477 "Attempted to dereference a non-dereferenceable iterator"); 1478#endif 1479 return *__i; 1480 } 1481 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1482 { 1483#if _LIBCPP_DEBUG_LEVEL == 2 1484 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1485 "Attempted to dereference a non-dereferenceable iterator"); 1486#endif 1487 return (pointer)_VSTD::addressof(*__i); 1488 } 1489 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1490 { 1491#if _LIBCPP_DEBUG_LEVEL == 2 1492 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1493 "Attempted to increment non-incrementable iterator"); 1494#endif 1495 ++__i; 1496 return *this; 1497 } 1498 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1499 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1500 1501 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1502 { 1503#if _LIBCPP_DEBUG_LEVEL == 2 1504 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1505 "Attempted to decrement non-decrementable iterator"); 1506#endif 1507 --__i; 1508 return *this; 1509 } 1510 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1511 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1512 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1513 {__wrap_iter __w(*this); __w += __n; return __w;} 1514 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1515 { 1516#if _LIBCPP_DEBUG_LEVEL == 2 1517 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1518 "Attempted to add/subtract iterator outside of valid range"); 1519#endif 1520 __i += __n; 1521 return *this; 1522 } 1523 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1524 {return *this + (-__n);} 1525 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1526 {*this += -__n; return *this;} 1527 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1528 { 1529#if _LIBCPP_DEBUG_LEVEL == 2 1530 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1531 "Attempted to subscript iterator outside of valid range"); 1532#endif 1533 return __i[__n]; 1534 } 1535 1536 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1537 1538private: 1539#if _LIBCPP_DEBUG_LEVEL == 2 1540 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1541 { 1542 __get_db()->__insert_ic(this, __p); 1543 } 1544#else 1545 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1546#endif 1547 1548 template <class _Up> friend class __wrap_iter; 1549 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1550 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1551 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1552 1553 template <class _Iter1, class _Iter2> 1554 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1555 bool 1556 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1557 1558 template <class _Iter1, class _Iter2> 1559 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1560 bool 1561 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1562 1563 template <class _Iter1, class _Iter2> 1564 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1565 bool 1566 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1567 1568 template <class _Iter1, class _Iter2> 1569 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1570 bool 1571 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1572 1573 template <class _Iter1, class _Iter2> 1574 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1575 bool 1576 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1577 1578 template <class _Iter1, class _Iter2> 1579 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1580 bool 1581 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1582 1583#ifndef _LIBCPP_CXX03_LANG 1584 template <class _Iter1, class _Iter2> 1585 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1586 auto 1587 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1588 -> decltype(__x.base() - __y.base()); 1589#else 1590 template <class _Iter1, class _Iter2> 1591 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1592 typename __wrap_iter<_Iter1>::difference_type 1593 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1594#endif 1595 1596 template <class _Iter1> 1597 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1598 __wrap_iter<_Iter1> 1599 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1600 1601 template <class _Ip, class _Op> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _Op copy(_Ip, _Ip, _Op); 1602 template <class _B1, class _B2> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _B2 copy_backward(_B1, _B1, _B2); 1603 template <class _Ip, class _Op> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _Op move(_Ip, _Ip, _Op); 1604 template <class _B1, class _B2> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _B2 move_backward(_B1, _B1, _B2); 1605 1606#if _LIBCPP_DEBUG_LEVEL < 2 1607 template <class _Tp> 1608 _LIBCPP_CONSTEXPR friend 1609 typename enable_if 1610 < 1611 is_trivially_copy_assignable<_Tp>::value, 1612 _Tp* 1613 >::type 1614 __unwrap_iter(__wrap_iter<_Tp*>); 1615#else 1616 template <class _Tp> 1617 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR friend 1618 typename enable_if 1619 < 1620 is_trivially_copy_assignable<_Tp>::value, 1621 __wrap_iter<_Tp*> 1622 >::type 1623 __unwrap_iter(__wrap_iter<_Tp*> __i); 1624#endif 1625}; 1626 1627template <class _Iter1, class _Iter2> 1628inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1629bool 1630operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1631{ 1632 return __x.base() == __y.base(); 1633} 1634 1635template <class _Iter1, class _Iter2> 1636inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1637bool 1638operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1639{ 1640#if _LIBCPP_DEBUG_LEVEL == 2 1641 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1642 "Attempted to compare incomparable iterators"); 1643#endif 1644 return __x.base() < __y.base(); 1645} 1646 1647template <class _Iter1, class _Iter2> 1648inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1649bool 1650operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1651{ 1652 return !(__x == __y); 1653} 1654 1655template <class _Iter1, class _Iter2> 1656inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1657bool 1658operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1659{ 1660 return __y < __x; 1661} 1662 1663template <class _Iter1, class _Iter2> 1664inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1665bool 1666operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1667{ 1668 return !(__x < __y); 1669} 1670 1671template <class _Iter1, class _Iter2> 1672inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1673bool 1674operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1675{ 1676 return !(__y < __x); 1677} 1678 1679template <class _Iter1> 1680inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1681bool 1682operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1683{ 1684 return !(__x == __y); 1685} 1686 1687template <class _Iter1> 1688inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1689bool 1690operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1691{ 1692 return __y < __x; 1693} 1694 1695template <class _Iter1> 1696inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1697bool 1698operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1699{ 1700 return !(__x < __y); 1701} 1702 1703template <class _Iter1> 1704inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1705bool 1706operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1707{ 1708 return !(__y < __x); 1709} 1710 1711#ifndef _LIBCPP_CXX03_LANG 1712template <class _Iter1, class _Iter2> 1713inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1714auto 1715operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1716-> decltype(__x.base() - __y.base()) 1717{ 1718#if _LIBCPP_DEBUG_LEVEL == 2 1719 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1720 "Attempted to subtract incompatible iterators"); 1721#endif 1722 return __x.base() - __y.base(); 1723} 1724#else 1725template <class _Iter1, class _Iter2> 1726inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1727typename __wrap_iter<_Iter1>::difference_type 1728operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1729{ 1730#if _LIBCPP_DEBUG_LEVEL == 2 1731 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1732 "Attempted to subtract incompatible iterators"); 1733#endif 1734 return __x.base() - __y.base(); 1735} 1736#endif 1737 1738template <class _Iter> 1739inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1740__wrap_iter<_Iter> 1741operator+(typename __wrap_iter<_Iter>::difference_type __n, 1742 __wrap_iter<_Iter> __x) _NOEXCEPT 1743{ 1744 __x += __n; 1745 return __x; 1746} 1747 1748template <class _Iter> 1749struct __libcpp_is_trivial_iterator 1750 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1751 1752template <class _Iter> 1753struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1754 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1755 1756template <class _Iter> 1757struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1758 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1759 1760template <class _Iter> 1761struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1762 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1763 1764 1765template <class _Tp, size_t _Np> 1766_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1767_Tp* 1768begin(_Tp (&__array)[_Np]) 1769{ 1770 return __array; 1771} 1772 1773template <class _Tp, size_t _Np> 1774_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1775_Tp* 1776end(_Tp (&__array)[_Np]) 1777{ 1778 return __array + _Np; 1779} 1780 1781#if !defined(_LIBCPP_CXX03_LANG) 1782 1783template <class _Cp> 1784_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1785auto 1786begin(_Cp& __c) -> decltype(__c.begin()) 1787{ 1788 return __c.begin(); 1789} 1790 1791template <class _Cp> 1792_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1793auto 1794begin(const _Cp& __c) -> decltype(__c.begin()) 1795{ 1796 return __c.begin(); 1797} 1798 1799template <class _Cp> 1800_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1801auto 1802end(_Cp& __c) -> decltype(__c.end()) 1803{ 1804 return __c.end(); 1805} 1806 1807template <class _Cp> 1808_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1809auto 1810end(const _Cp& __c) -> decltype(__c.end()) 1811{ 1812 return __c.end(); 1813} 1814 1815#if _LIBCPP_STD_VER > 11 1816 1817template <class _Tp, size_t _Np> 1818_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1819reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1820{ 1821 return reverse_iterator<_Tp*>(__array + _Np); 1822} 1823 1824template <class _Tp, size_t _Np> 1825_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1826reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1827{ 1828 return reverse_iterator<_Tp*>(__array); 1829} 1830 1831template <class _Ep> 1832_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1833reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1834{ 1835 return reverse_iterator<const _Ep*>(__il.end()); 1836} 1837 1838template <class _Ep> 1839_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1840reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1841{ 1842 return reverse_iterator<const _Ep*>(__il.begin()); 1843} 1844 1845template <class _Cp> 1846_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1847auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1848{ 1849 return _VSTD::begin(__c); 1850} 1851 1852template <class _Cp> 1853_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1854auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1855{ 1856 return _VSTD::end(__c); 1857} 1858 1859template <class _Cp> 1860_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1861auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1862{ 1863 return __c.rbegin(); 1864} 1865 1866template <class _Cp> 1867_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1868auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1869{ 1870 return __c.rbegin(); 1871} 1872 1873template <class _Cp> 1874_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1875auto rend(_Cp& __c) -> decltype(__c.rend()) 1876{ 1877 return __c.rend(); 1878} 1879 1880template <class _Cp> 1881_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1882auto rend(const _Cp& __c) -> decltype(__c.rend()) 1883{ 1884 return __c.rend(); 1885} 1886 1887template <class _Cp> 1888_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1889auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1890{ 1891 return _VSTD::rbegin(__c); 1892} 1893 1894template <class _Cp> 1895_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1896auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1897{ 1898 return _VSTD::rend(__c); 1899} 1900 1901#endif 1902 1903 1904#else // defined(_LIBCPP_CXX03_LANG) 1905 1906template <class _Cp> 1907_LIBCPP_INLINE_VISIBILITY 1908typename _Cp::iterator 1909begin(_Cp& __c) 1910{ 1911 return __c.begin(); 1912} 1913 1914template <class _Cp> 1915_LIBCPP_INLINE_VISIBILITY 1916typename _Cp::const_iterator 1917begin(const _Cp& __c) 1918{ 1919 return __c.begin(); 1920} 1921 1922template <class _Cp> 1923_LIBCPP_INLINE_VISIBILITY 1924typename _Cp::iterator 1925end(_Cp& __c) 1926{ 1927 return __c.end(); 1928} 1929 1930template <class _Cp> 1931_LIBCPP_INLINE_VISIBILITY 1932typename _Cp::const_iterator 1933end(const _Cp& __c) 1934{ 1935 return __c.end(); 1936} 1937 1938#endif // !defined(_LIBCPP_CXX03_LANG) 1939 1940#if _LIBCPP_STD_VER > 14 1941 1942// #if _LIBCPP_STD_VER > 11 1943// template <> 1944// struct _LIBCPP_TEMPLATE_VIS plus<void> 1945// { 1946// template <class _T1, class _T2> 1947// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1948// auto operator()(_T1&& __t, _T2&& __u) const 1949// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1950// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1951// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1952// typedef void is_transparent; 1953// }; 1954// #endif 1955 1956template <class _Cont> 1957_LIBCPP_INLINE_VISIBILITY 1958constexpr auto size(const _Cont& __c) 1959_NOEXCEPT_(noexcept(__c.size())) 1960-> decltype (__c.size()) 1961{ return __c.size(); } 1962 1963template <class _Tp, size_t _Sz> 1964_LIBCPP_INLINE_VISIBILITY 1965constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1966 1967#if _LIBCPP_STD_VER > 17 1968template <class _Cont> 1969_LIBCPP_INLINE_VISIBILITY 1970constexpr auto ssize(const _Cont& __c) 1971_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1972-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1973{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1974 1975template <class _Tp, ptrdiff_t _Sz> 1976_LIBCPP_INLINE_VISIBILITY 1977constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1978#endif 1979 1980template <class _Cont> 1981_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1982constexpr auto empty(const _Cont& __c) 1983_NOEXCEPT_(noexcept(__c.empty())) 1984-> decltype (__c.empty()) 1985{ return __c.empty(); } 1986 1987template <class _Tp, size_t _Sz> 1988_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1989constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1990 1991template <class _Ep> 1992_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1993constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1994 1995template <class _Cont> constexpr 1996_LIBCPP_INLINE_VISIBILITY 1997auto data(_Cont& __c) 1998_NOEXCEPT_(noexcept(__c.data())) 1999-> decltype (__c.data()) 2000{ return __c.data(); } 2001 2002template <class _Cont> constexpr 2003_LIBCPP_INLINE_VISIBILITY 2004auto data(const _Cont& __c) 2005_NOEXCEPT_(noexcept(__c.data())) 2006-> decltype (__c.data()) 2007{ return __c.data(); } 2008 2009template <class _Tp, size_t _Sz> 2010_LIBCPP_INLINE_VISIBILITY 2011constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 2012 2013template <class _Ep> 2014_LIBCPP_INLINE_VISIBILITY 2015constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 2016#endif 2017 2018 2019_LIBCPP_END_NAMESPACE_STD 2020 2021#endif // _LIBCPP_ITERATOR 2022