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 <__memory/base.h> 424#include <version> 425 426#include <__debug> 427 428#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 429#pragma GCC system_header 430#endif 431 432_LIBCPP_BEGIN_NAMESPACE_STD 433template <class _Iter> 434struct _LIBCPP_TEMPLATE_VIS iterator_traits; 435 436struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {}; 437struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {}; 438struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag : public input_iterator_tag {}; 439struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {}; 440struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {}; 441#if _LIBCPP_STD_VER > 17 442// TODO(EricWF) contiguous_iterator_tag is provided as an extension prior to 443// C++20 to allow optimizations for users providing wrapped iterator types. 444struct _LIBCPP_TEMPLATE_VIS contiguous_iterator_tag: public random_access_iterator_tag { }; 445#endif 446 447template <class _Iter> 448struct __iter_traits_cache { 449 using type = _If< 450 __is_primary_template<iterator_traits<_Iter> >::value, 451 _Iter, 452 iterator_traits<_Iter> 453 >; 454}; 455template <class _Iter> 456using _ITER_TRAITS = typename __iter_traits_cache<_Iter>::type; 457 458struct __iter_concept_concept_test { 459 template <class _Iter> 460 using _Apply = typename _ITER_TRAITS<_Iter>::iterator_concept; 461}; 462struct __iter_concept_category_test { 463 template <class _Iter> 464 using _Apply = typename _ITER_TRAITS<_Iter>::iterator_category; 465}; 466struct __iter_concept_random_fallback { 467 template <class _Iter> 468 using _Apply = _EnableIf< 469 __is_primary_template<iterator_traits<_Iter> >::value, 470 random_access_iterator_tag 471 >; 472}; 473 474template <class _Iter, class _Tester> struct __test_iter_concept 475 : _IsValidExpansion<_Tester::template _Apply, _Iter>, 476 _Tester 477{ 478}; 479 480template <class _Iter> 481struct __iter_concept_cache { 482 using type = _Or< 483 __test_iter_concept<_Iter, __iter_concept_concept_test>, 484 __test_iter_concept<_Iter, __iter_concept_category_test>, 485 __test_iter_concept<_Iter, __iter_concept_random_fallback> 486 >; 487}; 488 489template <class _Iter> 490using _ITER_CONCEPT = typename __iter_concept_cache<_Iter>::type::template _Apply<_Iter>; 491 492 493template <class _Tp> 494struct __has_iterator_typedefs 495{ 496private: 497 struct __two {char __lx; char __lxx;}; 498 template <class _Up> static __two __test(...); 499 template <class _Up> static char __test(typename __void_t<typename _Up::iterator_category>::type* = 0, 500 typename __void_t<typename _Up::difference_type>::type* = 0, 501 typename __void_t<typename _Up::value_type>::type* = 0, 502 typename __void_t<typename _Up::reference>::type* = 0, 503 typename __void_t<typename _Up::pointer>::type* = 0); 504public: 505 static const bool value = sizeof(__test<_Tp>(0,0,0,0,0)) == 1; 506}; 507 508 509template <class _Tp> 510struct __has_iterator_category 511{ 512private: 513 struct __two {char __lx; char __lxx;}; 514 template <class _Up> static __two __test(...); 515 template <class _Up> static char __test(typename _Up::iterator_category* = nullptr); 516public: 517 static const bool value = sizeof(__test<_Tp>(nullptr)) == 1; 518}; 519 520template <class _Iter, bool> struct __iterator_traits_impl {}; 521 522template <class _Iter> 523struct __iterator_traits_impl<_Iter, true> 524{ 525 typedef typename _Iter::difference_type difference_type; 526 typedef typename _Iter::value_type value_type; 527 typedef typename _Iter::pointer pointer; 528 typedef typename _Iter::reference reference; 529 typedef typename _Iter::iterator_category iterator_category; 530}; 531 532template <class _Iter, bool> struct __iterator_traits {}; 533 534template <class _Iter> 535struct __iterator_traits<_Iter, true> 536 : __iterator_traits_impl 537 < 538 _Iter, 539 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value || 540 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value 541 > 542{}; 543 544// iterator_traits<Iterator> will only have the nested types if Iterator::iterator_category 545// exists. Else iterator_traits<Iterator> will be an empty class. This is a 546// conforming extension which allows some programs to compile and behave as 547// the client expects instead of failing at compile time. 548 549template <class _Iter> 550struct _LIBCPP_TEMPLATE_VIS iterator_traits 551 : __iterator_traits<_Iter, __has_iterator_typedefs<_Iter>::value> { 552 553 using __primary_template = iterator_traits; 554}; 555 556template<class _Tp> 557struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*> 558{ 559 typedef ptrdiff_t difference_type; 560 typedef typename remove_cv<_Tp>::type value_type; 561 typedef _Tp* pointer; 562 typedef _Tp& reference; 563 typedef random_access_iterator_tag iterator_category; 564#if _LIBCPP_STD_VER > 17 565 typedef contiguous_iterator_tag iterator_concept; 566#endif 567}; 568 569template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value> 570struct __has_iterator_category_convertible_to 571 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value> 572{}; 573 574template <class _Tp, class _Up> 575struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {}; 576 577template <class _Tp> 578struct __is_cpp17_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {}; 579 580template <class _Tp> 581struct __is_cpp17_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {}; 582 583template <class _Tp> 584struct __is_cpp17_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {}; 585 586template <class _Tp> 587struct __is_cpp17_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {}; 588 589#if _LIBCPP_STD_VER > 17 590template <class _Tp> 591struct __is_cpp17_contiguous_iterator : public __has_iterator_category_convertible_to<_Tp, contiguous_iterator_tag> {}; 592#else 593template <class _Tp> 594struct __is_cpp17_contiguous_iterator : public false_type {}; 595#endif 596 597 598template <class _Tp> 599struct __is_exactly_cpp17_input_iterator 600 : public integral_constant<bool, 601 __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && 602 !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; 603 604#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 605template<class _InputIterator> 606using __iter_value_type = typename iterator_traits<_InputIterator>::value_type; 607 608template<class _InputIterator> 609using __iter_key_type = remove_const_t<typename iterator_traits<_InputIterator>::value_type::first_type>; 610 611template<class _InputIterator> 612using __iter_mapped_type = typename iterator_traits<_InputIterator>::value_type::second_type; 613 614template<class _InputIterator> 615using __iter_to_alloc_type = pair< 616 add_const_t<typename iterator_traits<_InputIterator>::value_type::first_type>, 617 typename iterator_traits<_InputIterator>::value_type::second_type>; 618#endif 619 620template<class _Category, class _Tp, class _Distance = ptrdiff_t, 621 class _Pointer = _Tp*, class _Reference = _Tp&> 622struct _LIBCPP_TEMPLATE_VIS iterator 623{ 624 typedef _Tp value_type; 625 typedef _Distance difference_type; 626 typedef _Pointer pointer; 627 typedef _Reference reference; 628 typedef _Category iterator_category; 629}; 630 631template <class _InputIter> 632inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 633void __advance(_InputIter& __i, 634 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 635{ 636 for (; __n > 0; --__n) 637 ++__i; 638} 639 640template <class _BiDirIter> 641inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 642void __advance(_BiDirIter& __i, 643 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 644{ 645 if (__n >= 0) 646 for (; __n > 0; --__n) 647 ++__i; 648 else 649 for (; __n < 0; ++__n) 650 --__i; 651} 652 653template <class _RandIter> 654inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 655void __advance(_RandIter& __i, 656 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 657{ 658 __i += __n; 659} 660 661template <class _InputIter, class _Distance> 662inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 663void advance(_InputIter& __i, _Distance __orig_n) 664{ 665 _LIBCPP_ASSERT(__orig_n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 666 "Attempt to advance(it, n) with negative n on a non-bidirectional iterator"); 667 typedef decltype(_VSTD::__convert_to_integral(__orig_n)) _IntegralSize; 668 _IntegralSize __n = __orig_n; 669 _VSTD::__advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 670} 671 672template <class _InputIter> 673inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 674typename iterator_traits<_InputIter>::difference_type 675__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 676{ 677 typename iterator_traits<_InputIter>::difference_type __r(0); 678 for (; __first != __last; ++__first) 679 ++__r; 680 return __r; 681} 682 683template <class _RandIter> 684inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 685typename iterator_traits<_RandIter>::difference_type 686__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 687{ 688 return __last - __first; 689} 690 691template <class _InputIter> 692inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 693typename iterator_traits<_InputIter>::difference_type 694distance(_InputIter __first, _InputIter __last) 695{ 696 return _VSTD::__distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 697} 698 699template <class _InputIter> 700inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 701typename enable_if 702< 703 __is_cpp17_input_iterator<_InputIter>::value, 704 _InputIter 705>::type 706next(_InputIter __x, 707 typename iterator_traits<_InputIter>::difference_type __n = 1) 708{ 709 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 710 "Attempt to next(it, n) with negative n on a non-bidirectional iterator"); 711 712 _VSTD::advance(__x, __n); 713 return __x; 714} 715 716template <class _InputIter> 717inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 718typename enable_if 719< 720 __is_cpp17_input_iterator<_InputIter>::value, 721 _InputIter 722>::type 723prev(_InputIter __x, 724 typename iterator_traits<_InputIter>::difference_type __n = 1) 725{ 726 _LIBCPP_ASSERT(__n <= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 727 "Attempt to prev(it, n) with a positive n on a non-bidirectional iterator"); 728 _VSTD::advance(__x, -__n); 729 return __x; 730} 731 732 733template <class _Tp, class = void> 734struct __is_stashing_iterator : false_type {}; 735 736template <class _Tp> 737struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 738 : true_type {}; 739 740template <class _Iter> 741class _LIBCPP_TEMPLATE_VIS reverse_iterator 742 : public iterator<typename iterator_traits<_Iter>::iterator_category, 743 typename iterator_traits<_Iter>::value_type, 744 typename iterator_traits<_Iter>::difference_type, 745 typename iterator_traits<_Iter>::pointer, 746 typename iterator_traits<_Iter>::reference> 747{ 748private: 749 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 750 751 static_assert(!__is_stashing_iterator<_Iter>::value, 752 "The specified iterator type cannot be used with reverse_iterator; " 753 "Using stashing iterators with reverse_iterator causes undefined behavior"); 754 755protected: 756 _Iter current; 757public: 758 typedef _Iter iterator_type; 759 typedef typename iterator_traits<_Iter>::difference_type difference_type; 760 typedef typename iterator_traits<_Iter>::reference reference; 761 typedef typename iterator_traits<_Iter>::pointer pointer; 762 763 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 764 reverse_iterator() : __t(), current() {} 765 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 766 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 767 template <class _Up> 768 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 769 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 770 template <class _Up> 771 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 772 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 773 { __t = current = __u.base(); return *this; } 774 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 775 _Iter base() const {return current;} 776 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 777 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 778 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 779 pointer operator->() const {return _VSTD::addressof(operator*());} 780 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 781 reverse_iterator& operator++() {--current; return *this;} 782 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 783 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 784 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 785 reverse_iterator& operator--() {++current; return *this;} 786 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 787 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 788 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 789 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 790 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 791 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 792 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 793 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 794 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 795 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 796 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 797 reference operator[](difference_type __n) const {return *(*this + __n);} 798}; 799 800template <class _Iter1, class _Iter2> 801inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 802bool 803operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 804{ 805 return __x.base() == __y.base(); 806} 807 808template <class _Iter1, class _Iter2> 809inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 810bool 811operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 812{ 813 return __x.base() > __y.base(); 814} 815 816template <class _Iter1, class _Iter2> 817inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 818bool 819operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 820{ 821 return __x.base() != __y.base(); 822} 823 824template <class _Iter1, class _Iter2> 825inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 826bool 827operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 828{ 829 return __x.base() < __y.base(); 830} 831 832template <class _Iter1, class _Iter2> 833inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 834bool 835operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 836{ 837 return __x.base() <= __y.base(); 838} 839 840template <class _Iter1, class _Iter2> 841inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 842bool 843operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 844{ 845 return __x.base() >= __y.base(); 846} 847 848#ifndef _LIBCPP_CXX03_LANG 849template <class _Iter1, class _Iter2> 850inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 851auto 852operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 853-> decltype(__y.base() - __x.base()) 854{ 855 return __y.base() - __x.base(); 856} 857#else 858template <class _Iter1, class _Iter2> 859inline _LIBCPP_INLINE_VISIBILITY 860typename reverse_iterator<_Iter1>::difference_type 861operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 862{ 863 return __y.base() - __x.base(); 864} 865#endif 866 867template <class _Iter> 868inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 869reverse_iterator<_Iter> 870operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 871{ 872 return reverse_iterator<_Iter>(__x.base() - __n); 873} 874 875#if _LIBCPP_STD_VER > 11 876template <class _Iter> 877inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 878reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 879{ 880 return reverse_iterator<_Iter>(__i); 881} 882#endif 883 884template <class _Container> 885class _LIBCPP_TEMPLATE_VIS back_insert_iterator 886 : public iterator<output_iterator_tag, 887 void, 888 void, 889 void, 890 void> 891{ 892protected: 893 _Container* container; 894public: 895 typedef _Container container_type; 896 897 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 898 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 899 {container->push_back(__value_); return *this;} 900#ifndef _LIBCPP_CXX03_LANG 901 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 902 {container->push_back(_VSTD::move(__value_)); return *this;} 903#endif // _LIBCPP_CXX03_LANG 904 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 905 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 906 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 907}; 908 909template <class _Container> 910inline _LIBCPP_INLINE_VISIBILITY 911back_insert_iterator<_Container> 912back_inserter(_Container& __x) 913{ 914 return back_insert_iterator<_Container>(__x); 915} 916 917template <class _Container> 918class _LIBCPP_TEMPLATE_VIS front_insert_iterator 919 : public iterator<output_iterator_tag, 920 void, 921 void, 922 void, 923 void> 924{ 925protected: 926 _Container* container; 927public: 928 typedef _Container container_type; 929 930 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 931 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 932 {container->push_front(__value_); return *this;} 933#ifndef _LIBCPP_CXX03_LANG 934 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 935 {container->push_front(_VSTD::move(__value_)); return *this;} 936#endif // _LIBCPP_CXX03_LANG 937 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 938 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 939 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 940}; 941 942template <class _Container> 943inline _LIBCPP_INLINE_VISIBILITY 944front_insert_iterator<_Container> 945front_inserter(_Container& __x) 946{ 947 return front_insert_iterator<_Container>(__x); 948} 949 950template <class _Container> 951class _LIBCPP_TEMPLATE_VIS insert_iterator 952 : public iterator<output_iterator_tag, 953 void, 954 void, 955 void, 956 void> 957{ 958protected: 959 _Container* container; 960 typename _Container::iterator iter; 961public: 962 typedef _Container container_type; 963 964 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 965 : container(_VSTD::addressof(__x)), iter(__i) {} 966 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 967 {iter = container->insert(iter, __value_); ++iter; return *this;} 968#ifndef _LIBCPP_CXX03_LANG 969 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 970 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 971#endif // _LIBCPP_CXX03_LANG 972 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 973 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 974 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 975}; 976 977template <class _Container> 978inline _LIBCPP_INLINE_VISIBILITY 979insert_iterator<_Container> 980inserter(_Container& __x, typename _Container::iterator __i) 981{ 982 return insert_iterator<_Container>(__x, __i); 983} 984 985template <class _Tp, class _CharT = char, 986 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 987class _LIBCPP_TEMPLATE_VIS istream_iterator 988 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 989{ 990public: 991 typedef _CharT char_type; 992 typedef _Traits traits_type; 993 typedef basic_istream<_CharT,_Traits> istream_type; 994private: 995 istream_type* __in_stream_; 996 _Tp __value_; 997public: 998 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(nullptr), __value_() {} 999 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 1000 { 1001 if (!(*__in_stream_ >> __value_)) 1002 __in_stream_ = nullptr; 1003 } 1004 1005 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 1006 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 1007 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 1008 { 1009 if (!(*__in_stream_ >> __value_)) 1010 __in_stream_ = nullptr; 1011 return *this; 1012 } 1013 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 1014 {istream_iterator __t(*this); ++(*this); return __t;} 1015 1016 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1017 friend _LIBCPP_INLINE_VISIBILITY 1018 bool 1019 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1020 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1021 1022 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1023 friend _LIBCPP_INLINE_VISIBILITY 1024 bool 1025 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1026 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1027}; 1028 1029template <class _Tp, class _CharT, class _Traits, class _Distance> 1030inline _LIBCPP_INLINE_VISIBILITY 1031bool 1032operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1033 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1034{ 1035 return __x.__in_stream_ == __y.__in_stream_; 1036} 1037 1038template <class _Tp, class _CharT, class _Traits, class _Distance> 1039inline _LIBCPP_INLINE_VISIBILITY 1040bool 1041operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1042 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1043{ 1044 return !(__x == __y); 1045} 1046 1047template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 1048class _LIBCPP_TEMPLATE_VIS ostream_iterator 1049 : public iterator<output_iterator_tag, void, void, void, void> 1050{ 1051public: 1052 typedef output_iterator_tag iterator_category; 1053 typedef void value_type; 1054#if _LIBCPP_STD_VER > 17 1055 typedef std::ptrdiff_t difference_type; 1056#else 1057 typedef void difference_type; 1058#endif 1059 typedef void pointer; 1060 typedef void reference; 1061 typedef _CharT char_type; 1062 typedef _Traits traits_type; 1063 typedef basic_ostream<_CharT, _Traits> ostream_type; 1064 1065private: 1066 ostream_type* __out_stream_; 1067 const char_type* __delim_; 1068public: 1069 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 1070 : __out_stream_(_VSTD::addressof(__s)), __delim_(nullptr) {} 1071 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 1072 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 1073 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1074 { 1075 *__out_stream_ << __value_; 1076 if (__delim_) 1077 *__out_stream_ << __delim_; 1078 return *this; 1079 } 1080 1081 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1082 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1083 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1084}; 1085 1086template<class _CharT, class _Traits> 1087class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1088 : public iterator<input_iterator_tag, _CharT, 1089 typename _Traits::off_type, _CharT*, 1090 _CharT> 1091{ 1092public: 1093 typedef _CharT char_type; 1094 typedef _Traits traits_type; 1095 typedef typename _Traits::int_type int_type; 1096 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1097 typedef basic_istream<_CharT,_Traits> istream_type; 1098private: 1099 mutable streambuf_type* __sbuf_; 1100 1101 class __proxy 1102 { 1103 char_type __keep_; 1104 streambuf_type* __sbuf_; 1105 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1106 : __keep_(__c), __sbuf_(__s) {} 1107 friend class istreambuf_iterator; 1108 public: 1109 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1110 }; 1111 1112 _LIBCPP_INLINE_VISIBILITY 1113 bool __test_for_eof() const 1114 { 1115 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1116 __sbuf_ = nullptr; 1117 return __sbuf_ == nullptr; 1118 } 1119public: 1120 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(nullptr) {} 1121 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1122 : __sbuf_(__s.rdbuf()) {} 1123 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1124 : __sbuf_(__s) {} 1125 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1126 : __sbuf_(__p.__sbuf_) {} 1127 1128 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1129 {return static_cast<char_type>(__sbuf_->sgetc());} 1130 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1131 { 1132 __sbuf_->sbumpc(); 1133 return *this; 1134 } 1135 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1136 { 1137 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1138 } 1139 1140 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1141 {return __test_for_eof() == __b.__test_for_eof();} 1142}; 1143 1144template <class _CharT, class _Traits> 1145inline _LIBCPP_INLINE_VISIBILITY 1146bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1147 const istreambuf_iterator<_CharT,_Traits>& __b) 1148 {return __a.equal(__b);} 1149 1150template <class _CharT, class _Traits> 1151inline _LIBCPP_INLINE_VISIBILITY 1152bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1153 const istreambuf_iterator<_CharT,_Traits>& __b) 1154 {return !__a.equal(__b);} 1155 1156template <class _CharT, class _Traits> 1157class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1158 : public iterator<output_iterator_tag, void, void, void, void> 1159{ 1160public: 1161 typedef output_iterator_tag iterator_category; 1162 typedef void value_type; 1163#if _LIBCPP_STD_VER > 17 1164 typedef std::ptrdiff_t difference_type; 1165#else 1166 typedef void difference_type; 1167#endif 1168 typedef void pointer; 1169 typedef void reference; 1170 typedef _CharT char_type; 1171 typedef _Traits traits_type; 1172 typedef basic_streambuf<_CharT, _Traits> streambuf_type; 1173 typedef basic_ostream<_CharT, _Traits> ostream_type; 1174 1175private: 1176 streambuf_type* __sbuf_; 1177public: 1178 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1179 : __sbuf_(__s.rdbuf()) {} 1180 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1181 : __sbuf_(__s) {} 1182 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1183 { 1184 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1185 __sbuf_ = nullptr; 1186 return *this; 1187 } 1188 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1189 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1190 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1191 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == nullptr;} 1192 1193 template <class _Ch, class _Tr> 1194 friend 1195 _LIBCPP_HIDDEN 1196 ostreambuf_iterator<_Ch, _Tr> 1197 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1198 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1199 ios_base& __iob, _Ch __fl); 1200}; 1201 1202template <class _Iter> 1203class _LIBCPP_TEMPLATE_VIS move_iterator 1204{ 1205private: 1206 _Iter __i; 1207public: 1208 typedef _Iter iterator_type; 1209 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1210 typedef typename iterator_traits<iterator_type>::value_type value_type; 1211 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1212 typedef iterator_type pointer; 1213#ifndef _LIBCPP_CXX03_LANG 1214 typedef typename iterator_traits<iterator_type>::reference __reference; 1215 typedef typename conditional< 1216 is_reference<__reference>::value, 1217 typename remove_reference<__reference>::type&&, 1218 __reference 1219 >::type reference; 1220#else 1221 typedef typename iterator_traits<iterator_type>::reference reference; 1222#endif 1223 1224 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1225 move_iterator() : __i() {} 1226 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1227 explicit move_iterator(_Iter __x) : __i(__x) {} 1228 template <class _Up> 1229 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1230 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1231 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1232 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1233 reference operator*() const { return static_cast<reference>(*__i); } 1234 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1235 pointer operator->() const { return __i;} 1236 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1237 move_iterator& operator++() {++__i; return *this;} 1238 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1239 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1240 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1241 move_iterator& operator--() {--__i; return *this;} 1242 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1243 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1244 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1245 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1246 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1247 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1248 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1249 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1250 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1251 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1252 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1253 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1254}; 1255 1256template <class _Iter1, class _Iter2> 1257inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1258bool 1259operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1260{ 1261 return __x.base() == __y.base(); 1262} 1263 1264template <class _Iter1, class _Iter2> 1265inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1266bool 1267operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1268{ 1269 return __x.base() < __y.base(); 1270} 1271 1272template <class _Iter1, class _Iter2> 1273inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1274bool 1275operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1276{ 1277 return __x.base() != __y.base(); 1278} 1279 1280template <class _Iter1, class _Iter2> 1281inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1282bool 1283operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1284{ 1285 return __x.base() > __y.base(); 1286} 1287 1288template <class _Iter1, class _Iter2> 1289inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1290bool 1291operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1292{ 1293 return __x.base() >= __y.base(); 1294} 1295 1296template <class _Iter1, class _Iter2> 1297inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1298bool 1299operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1300{ 1301 return __x.base() <= __y.base(); 1302} 1303 1304#ifndef _LIBCPP_CXX03_LANG 1305template <class _Iter1, class _Iter2> 1306inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1307auto 1308operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1309-> decltype(__x.base() - __y.base()) 1310{ 1311 return __x.base() - __y.base(); 1312} 1313#else 1314template <class _Iter1, class _Iter2> 1315inline _LIBCPP_INLINE_VISIBILITY 1316typename move_iterator<_Iter1>::difference_type 1317operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1318{ 1319 return __x.base() - __y.base(); 1320} 1321#endif 1322 1323template <class _Iter> 1324inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1325move_iterator<_Iter> 1326operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1327{ 1328 return move_iterator<_Iter>(__x.base() + __n); 1329} 1330 1331template <class _Iter> 1332inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1333move_iterator<_Iter> 1334make_move_iterator(_Iter __i) 1335{ 1336 return move_iterator<_Iter>(__i); 1337} 1338 1339// __wrap_iter 1340 1341template <class _Iter> class __wrap_iter; 1342 1343template <class _Iter1, class _Iter2> 1344_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1345bool 1346operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1347 1348template <class _Iter1, class _Iter2> 1349_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1350bool 1351operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1352 1353template <class _Iter1, class _Iter2> 1354_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1355bool 1356operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1357 1358template <class _Iter1, class _Iter2> 1359_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1360bool 1361operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1362 1363template <class _Iter1, class _Iter2> 1364_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1365bool 1366operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1367 1368template <class _Iter1, class _Iter2> 1369_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1370bool 1371operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1372 1373#ifndef _LIBCPP_CXX03_LANG 1374template <class _Iter1, class _Iter2> 1375_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1376auto 1377operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1378-> decltype(__x.base() - __y.base()); 1379#else 1380template <class _Iter1, class _Iter2> 1381_LIBCPP_INLINE_VISIBILITY 1382typename __wrap_iter<_Iter1>::difference_type 1383operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1384#endif 1385 1386template <class _Iter> 1387_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1388__wrap_iter<_Iter> 1389operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1390 1391template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1392template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1393template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move(_Ip, _Ip, _Op); 1394template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 move_backward(_B1, _B1, _B2); 1395 1396#if _LIBCPP_DEBUG_LEVEL < 2 1397 1398template <class _Tp> 1399_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1400typename enable_if 1401< 1402 is_trivially_copy_assignable<_Tp>::value, 1403 _Tp* 1404>::type 1405__unwrap_iter(__wrap_iter<_Tp*>); 1406 1407#else 1408 1409template <class _Tp> 1410inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR 1411typename enable_if 1412< 1413 is_trivially_copy_assignable<_Tp>::value, 1414 __wrap_iter<_Tp*> 1415>::type 1416__unwrap_iter(__wrap_iter<_Tp*> __i); 1417 1418#endif 1419 1420template <class _Iter> 1421class __wrap_iter 1422{ 1423public: 1424 typedef _Iter iterator_type; 1425 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1426 typedef typename iterator_traits<iterator_type>::value_type value_type; 1427 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1428 typedef typename iterator_traits<iterator_type>::pointer pointer; 1429 typedef typename iterator_traits<iterator_type>::reference reference; 1430private: 1431 iterator_type __i; 1432public: 1433 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1434#if _LIBCPP_STD_VER > 11 1435 : __i{} 1436#endif 1437 { 1438#if _LIBCPP_DEBUG_LEVEL == 2 1439 __get_db()->__insert_i(this); 1440#endif 1441 } 1442 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1443 __wrap_iter(const __wrap_iter<_Up>& __u, 1444 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = nullptr) _NOEXCEPT 1445 : __i(__u.base()) 1446 { 1447#if _LIBCPP_DEBUG_LEVEL == 2 1448 __get_db()->__iterator_copy(this, &__u); 1449#endif 1450 } 1451#if _LIBCPP_DEBUG_LEVEL == 2 1452 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1453 __wrap_iter(const __wrap_iter& __x) 1454 : __i(__x.base()) 1455 { 1456 __get_db()->__iterator_copy(this, &__x); 1457 } 1458 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1459 __wrap_iter& operator=(const __wrap_iter& __x) 1460 { 1461 if (this != &__x) 1462 { 1463 __get_db()->__iterator_copy(this, &__x); 1464 __i = __x.__i; 1465 } 1466 return *this; 1467 } 1468 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1469 ~__wrap_iter() 1470 { 1471 __get_db()->__erase_i(this); 1472 } 1473#endif 1474 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1475 { 1476#if _LIBCPP_DEBUG_LEVEL == 2 1477 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1478 "Attempted to dereference a non-dereferenceable iterator"); 1479#endif 1480 return *__i; 1481 } 1482 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1483 { 1484#if _LIBCPP_DEBUG_LEVEL == 2 1485 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1486 "Attempted to dereference a non-dereferenceable iterator"); 1487#endif 1488 return (pointer)_VSTD::addressof(*__i); 1489 } 1490 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1491 { 1492#if _LIBCPP_DEBUG_LEVEL == 2 1493 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1494 "Attempted to increment non-incrementable iterator"); 1495#endif 1496 ++__i; 1497 return *this; 1498 } 1499 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1500 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1501 1502 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1503 { 1504#if _LIBCPP_DEBUG_LEVEL == 2 1505 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1506 "Attempted to decrement non-decrementable iterator"); 1507#endif 1508 --__i; 1509 return *this; 1510 } 1511 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1512 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1513 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1514 {__wrap_iter __w(*this); __w += __n; return __w;} 1515 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1516 { 1517#if _LIBCPP_DEBUG_LEVEL == 2 1518 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1519 "Attempted to add/subtract iterator outside of valid range"); 1520#endif 1521 __i += __n; 1522 return *this; 1523 } 1524 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1525 {return *this + (-__n);} 1526 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1527 {*this += -__n; return *this;} 1528 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1529 { 1530#if _LIBCPP_DEBUG_LEVEL == 2 1531 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1532 "Attempted to subscript iterator outside of valid range"); 1533#endif 1534 return __i[__n]; 1535 } 1536 1537 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1538 1539private: 1540#if _LIBCPP_DEBUG_LEVEL == 2 1541 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1542 { 1543 __get_db()->__insert_ic(this, __p); 1544 } 1545#else 1546 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1547#endif 1548 1549 template <class _Up> friend class __wrap_iter; 1550 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1551 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1552 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1553 1554 template <class _Iter1, class _Iter2> 1555 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1556 bool 1557 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1558 1559 template <class _Iter1, class _Iter2> 1560 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1561 bool 1562 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1563 1564 template <class _Iter1, class _Iter2> 1565 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1566 bool 1567 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1568 1569 template <class _Iter1, class _Iter2> 1570 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1571 bool 1572 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1573 1574 template <class _Iter1, class _Iter2> 1575 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1576 bool 1577 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1578 1579 template <class _Iter1, class _Iter2> 1580 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1581 bool 1582 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1583 1584#ifndef _LIBCPP_CXX03_LANG 1585 template <class _Iter1, class _Iter2> 1586 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1587 auto 1588 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1589 -> decltype(__x.base() - __y.base()); 1590#else 1591 template <class _Iter1, class _Iter2> 1592 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1593 typename __wrap_iter<_Iter1>::difference_type 1594 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1595#endif 1596 1597 template <class _Iter1> 1598 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1599 __wrap_iter<_Iter1> 1600 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1601 1602 template <class _Ip, class _Op> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _Op copy(_Ip, _Ip, _Op); 1603 template <class _B1, class _B2> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _B2 copy_backward(_B1, _B1, _B2); 1604 template <class _Ip, class _Op> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _Op move(_Ip, _Ip, _Op); 1605 template <class _B1, class _B2> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _B2 move_backward(_B1, _B1, _B2); 1606 1607#if _LIBCPP_DEBUG_LEVEL < 2 1608 template <class _Tp> 1609 _LIBCPP_CONSTEXPR friend 1610 typename enable_if 1611 < 1612 is_trivially_copy_assignable<_Tp>::value, 1613 _Tp* 1614 >::type 1615 __unwrap_iter(__wrap_iter<_Tp*>); 1616#else 1617 template <class _Tp> 1618 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR friend 1619 typename enable_if 1620 < 1621 is_trivially_copy_assignable<_Tp>::value, 1622 __wrap_iter<_Tp*> 1623 >::type 1624 __unwrap_iter(__wrap_iter<_Tp*> __i); 1625#endif 1626}; 1627 1628template <class _Iter1, class _Iter2> 1629inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1630bool 1631operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1632{ 1633 return __x.base() == __y.base(); 1634} 1635 1636template <class _Iter1, class _Iter2> 1637inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1638bool 1639operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1640{ 1641#if _LIBCPP_DEBUG_LEVEL == 2 1642 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1643 "Attempted to compare incomparable iterators"); 1644#endif 1645 return __x.base() < __y.base(); 1646} 1647 1648template <class _Iter1, class _Iter2> 1649inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1650bool 1651operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1652{ 1653 return !(__x == __y); 1654} 1655 1656template <class _Iter1, class _Iter2> 1657inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1658bool 1659operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1660{ 1661 return __y < __x; 1662} 1663 1664template <class _Iter1, class _Iter2> 1665inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1666bool 1667operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1668{ 1669 return !(__x < __y); 1670} 1671 1672template <class _Iter1, class _Iter2> 1673inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1674bool 1675operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1676{ 1677 return !(__y < __x); 1678} 1679 1680template <class _Iter1> 1681inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1682bool 1683operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1684{ 1685 return !(__x == __y); 1686} 1687 1688template <class _Iter1> 1689inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1690bool 1691operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1692{ 1693 return __y < __x; 1694} 1695 1696template <class _Iter1> 1697inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1698bool 1699operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1700{ 1701 return !(__x < __y); 1702} 1703 1704template <class _Iter1> 1705inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1706bool 1707operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1708{ 1709 return !(__y < __x); 1710} 1711 1712#ifndef _LIBCPP_CXX03_LANG 1713template <class _Iter1, class _Iter2> 1714inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1715auto 1716operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1717-> decltype(__x.base() - __y.base()) 1718{ 1719#if _LIBCPP_DEBUG_LEVEL == 2 1720 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1721 "Attempted to subtract incompatible iterators"); 1722#endif 1723 return __x.base() - __y.base(); 1724} 1725#else 1726template <class _Iter1, class _Iter2> 1727inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1728typename __wrap_iter<_Iter1>::difference_type 1729operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1730{ 1731#if _LIBCPP_DEBUG_LEVEL == 2 1732 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1733 "Attempted to subtract incompatible iterators"); 1734#endif 1735 return __x.base() - __y.base(); 1736} 1737#endif 1738 1739template <class _Iter> 1740inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1741__wrap_iter<_Iter> 1742operator+(typename __wrap_iter<_Iter>::difference_type __n, 1743 __wrap_iter<_Iter> __x) _NOEXCEPT 1744{ 1745 __x += __n; 1746 return __x; 1747} 1748 1749template <class _Iter> 1750struct __libcpp_is_trivial_iterator 1751 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1752 1753template <class _Iter> 1754struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1755 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1756 1757template <class _Iter> 1758struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1759 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1760 1761template <class _Iter> 1762struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1763 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1764 1765 1766template <class _Tp, size_t _Np> 1767_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1768_Tp* 1769begin(_Tp (&__array)[_Np]) 1770{ 1771 return __array; 1772} 1773 1774template <class _Tp, size_t _Np> 1775_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1776_Tp* 1777end(_Tp (&__array)[_Np]) 1778{ 1779 return __array + _Np; 1780} 1781 1782#if !defined(_LIBCPP_CXX03_LANG) 1783 1784template <class _Cp> 1785_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1786auto 1787begin(_Cp& __c) -> decltype(__c.begin()) 1788{ 1789 return __c.begin(); 1790} 1791 1792template <class _Cp> 1793_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1794auto 1795begin(const _Cp& __c) -> decltype(__c.begin()) 1796{ 1797 return __c.begin(); 1798} 1799 1800template <class _Cp> 1801_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1802auto 1803end(_Cp& __c) -> decltype(__c.end()) 1804{ 1805 return __c.end(); 1806} 1807 1808template <class _Cp> 1809_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1810auto 1811end(const _Cp& __c) -> decltype(__c.end()) 1812{ 1813 return __c.end(); 1814} 1815 1816#if _LIBCPP_STD_VER > 11 1817 1818template <class _Tp, size_t _Np> 1819_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1820reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1821{ 1822 return reverse_iterator<_Tp*>(__array + _Np); 1823} 1824 1825template <class _Tp, size_t _Np> 1826_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1827reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1828{ 1829 return reverse_iterator<_Tp*>(__array); 1830} 1831 1832template <class _Ep> 1833_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1834reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1835{ 1836 return reverse_iterator<const _Ep*>(__il.end()); 1837} 1838 1839template <class _Ep> 1840_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1841reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1842{ 1843 return reverse_iterator<const _Ep*>(__il.begin()); 1844} 1845 1846template <class _Cp> 1847_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1848auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1849{ 1850 return _VSTD::begin(__c); 1851} 1852 1853template <class _Cp> 1854_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1855auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1856{ 1857 return _VSTD::end(__c); 1858} 1859 1860template <class _Cp> 1861_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1862auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1863{ 1864 return __c.rbegin(); 1865} 1866 1867template <class _Cp> 1868_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1869auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1870{ 1871 return __c.rbegin(); 1872} 1873 1874template <class _Cp> 1875_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1876auto rend(_Cp& __c) -> decltype(__c.rend()) 1877{ 1878 return __c.rend(); 1879} 1880 1881template <class _Cp> 1882_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1883auto rend(const _Cp& __c) -> decltype(__c.rend()) 1884{ 1885 return __c.rend(); 1886} 1887 1888template <class _Cp> 1889_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1890auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1891{ 1892 return _VSTD::rbegin(__c); 1893} 1894 1895template <class _Cp> 1896_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1897auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1898{ 1899 return _VSTD::rend(__c); 1900} 1901 1902#endif 1903 1904 1905#else // defined(_LIBCPP_CXX03_LANG) 1906 1907template <class _Cp> 1908_LIBCPP_INLINE_VISIBILITY 1909typename _Cp::iterator 1910begin(_Cp& __c) 1911{ 1912 return __c.begin(); 1913} 1914 1915template <class _Cp> 1916_LIBCPP_INLINE_VISIBILITY 1917typename _Cp::const_iterator 1918begin(const _Cp& __c) 1919{ 1920 return __c.begin(); 1921} 1922 1923template <class _Cp> 1924_LIBCPP_INLINE_VISIBILITY 1925typename _Cp::iterator 1926end(_Cp& __c) 1927{ 1928 return __c.end(); 1929} 1930 1931template <class _Cp> 1932_LIBCPP_INLINE_VISIBILITY 1933typename _Cp::const_iterator 1934end(const _Cp& __c) 1935{ 1936 return __c.end(); 1937} 1938 1939#endif // !defined(_LIBCPP_CXX03_LANG) 1940 1941#if _LIBCPP_STD_VER > 14 1942 1943// #if _LIBCPP_STD_VER > 11 1944// template <> 1945// struct _LIBCPP_TEMPLATE_VIS plus<void> 1946// { 1947// template <class _T1, class _T2> 1948// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1949// auto operator()(_T1&& __t, _T2&& __u) const 1950// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1951// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1952// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1953// typedef void is_transparent; 1954// }; 1955// #endif 1956 1957template <class _Cont> 1958_LIBCPP_INLINE_VISIBILITY 1959constexpr auto size(const _Cont& __c) 1960_NOEXCEPT_(noexcept(__c.size())) 1961-> decltype (__c.size()) 1962{ return __c.size(); } 1963 1964template <class _Tp, size_t _Sz> 1965_LIBCPP_INLINE_VISIBILITY 1966constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1967 1968#if _LIBCPP_STD_VER > 17 1969template <class _Cont> 1970_LIBCPP_INLINE_VISIBILITY 1971constexpr auto ssize(const _Cont& __c) 1972_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1973-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1974{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1975 1976template <class _Tp, ptrdiff_t _Sz> 1977_LIBCPP_INLINE_VISIBILITY 1978constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1979#endif 1980 1981template <class _Cont> 1982_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1983constexpr auto empty(const _Cont& __c) 1984_NOEXCEPT_(noexcept(__c.empty())) 1985-> decltype (__c.empty()) 1986{ return __c.empty(); } 1987 1988template <class _Tp, size_t _Sz> 1989_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1990constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1991 1992template <class _Ep> 1993_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1994constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1995 1996template <class _Cont> constexpr 1997_LIBCPP_INLINE_VISIBILITY 1998auto data(_Cont& __c) 1999_NOEXCEPT_(noexcept(__c.data())) 2000-> decltype (__c.data()) 2001{ return __c.data(); } 2002 2003template <class _Cont> constexpr 2004_LIBCPP_INLINE_VISIBILITY 2005auto data(const _Cont& __c) 2006_NOEXCEPT_(noexcept(__c.data())) 2007-> decltype (__c.data()) 2008{ return __c.data(); } 2009 2010template <class _Tp, size_t _Sz> 2011_LIBCPP_INLINE_VISIBILITY 2012constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 2013 2014template <class _Ep> 2015_LIBCPP_INLINE_VISIBILITY 2016constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 2017#endif 2018 2019 2020_LIBCPP_END_NAMESPACE_STD 2021 2022#endif // _LIBCPP_ITERATOR 2023