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 57// extension: second argument not conforming to C++03 58template <class InputIterator> // constexpr in C++17 59 constexpr void advance(InputIterator& i, 60 typename iterator_traits<InputIterator>::difference_type n); 61 62template <class InputIterator> // constexpr in C++17 63 constexpr typename iterator_traits<InputIterator>::difference_type 64 distance(InputIterator first, InputIterator last); 65 66template <class InputIterator> // constexpr in C++17 67 constexpr InputIterator next(InputIterator x, 68typename iterator_traits<InputIterator>::difference_type n = 1); 69 70template <class BidirectionalIterator> // constexpr in C++17 71 constexpr BidirectionalIterator prev(BidirectionalIterator x, 72 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 73 74template <class Iterator> 75class reverse_iterator 76 : public iterator<typename iterator_traits<Iterator>::iterator_category, 77 typename iterator_traits<Iterator>::value_type, 78 typename iterator_traits<Iterator>::difference_type, 79 typename iterator_traits<Iterator>::pointer, 80 typename iterator_traits<Iterator>::reference> 81{ 82protected: 83 Iterator current; 84public: 85 typedef Iterator iterator_type; 86 typedef typename iterator_traits<Iterator>::difference_type difference_type; 87 typedef typename iterator_traits<Iterator>::reference reference; 88 typedef typename iterator_traits<Iterator>::pointer pointer; 89 90 constexpr reverse_iterator(); 91 constexpr explicit reverse_iterator(Iterator x); 92 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 93 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 94 constexpr Iterator base() const; 95 constexpr reference operator*() const; 96 constexpr pointer operator->() const; 97 constexpr reverse_iterator& operator++(); 98 constexpr reverse_iterator operator++(int); 99 constexpr reverse_iterator& operator--(); 100 constexpr reverse_iterator operator--(int); 101 constexpr reverse_iterator operator+ (difference_type n) const; 102 constexpr reverse_iterator& operator+=(difference_type n); 103 constexpr reverse_iterator operator- (difference_type n) const; 104 constexpr reverse_iterator& operator-=(difference_type n); 105 constexpr reference operator[](difference_type n) const; 106}; 107 108template <class Iterator1, class Iterator2> 109constexpr bool // constexpr in C++17 110operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 111 112template <class Iterator1, class Iterator2> 113constexpr bool // constexpr in C++17 114operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 115 116template <class Iterator1, class Iterator2> 117constexpr bool // constexpr in C++17 118operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 119 120template <class Iterator1, class Iterator2> 121constexpr bool // constexpr in C++17 122operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 123 124template <class Iterator1, class Iterator2> 125constexpr bool // constexpr in C++17 126operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 127 128template <class Iterator1, class Iterator2> 129constexpr bool // constexpr in C++17 130operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 131 132template <class Iterator1, class Iterator2> 133constexpr auto 134operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 135-> decltype(__y.base() - __x.base()); // constexpr in C++17 136 137template <class Iterator> 138constexpr reverse_iterator<Iterator> 139operator+(typename reverse_iterator<Iterator>::difference_type n, 140 const reverse_iterator<Iterator>& x); // constexpr in C++17 141 142template <class Iterator> 143constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 144 145template <class Container> 146class back_insert_iterator 147{ 148protected: 149 Container* container; 150public: 151 typedef Container container_type; 152 typedef void value_type; 153 typedef void difference_type; 154 typedef void reference; 155 typedef void pointer; 156 157 explicit back_insert_iterator(Container& x); 158 back_insert_iterator& operator=(const typename Container::value_type& value); 159 back_insert_iterator& operator*(); 160 back_insert_iterator& operator++(); 161 back_insert_iterator operator++(int); 162}; 163 164template <class Container> back_insert_iterator<Container> back_inserter(Container& x); 165 166template <class Container> 167class front_insert_iterator 168{ 169protected: 170 Container* container; 171public: 172 typedef Container container_type; 173 typedef void value_type; 174 typedef void difference_type; 175 typedef void reference; 176 typedef void pointer; 177 178 explicit front_insert_iterator(Container& x); 179 front_insert_iterator& operator=(const typename Container::value_type& value); 180 front_insert_iterator& operator*(); 181 front_insert_iterator& operator++(); 182 front_insert_iterator operator++(int); 183}; 184 185template <class Container> front_insert_iterator<Container> front_inserter(Container& x); 186 187template <class Container> 188class insert_iterator 189{ 190protected: 191 Container* container; 192 typename Container::iterator iter; 193public: 194 typedef Container container_type; 195 typedef void value_type; 196 typedef void difference_type; 197 typedef void reference; 198 typedef void pointer; 199 200 insert_iterator(Container& x, typename Container::iterator i); 201 insert_iterator& operator=(const typename Container::value_type& value); 202 insert_iterator& operator*(); 203 insert_iterator& operator++(); 204 insert_iterator& operator++(int); 205}; 206 207template <class Container, class Iterator> 208insert_iterator<Container> inserter(Container& x, Iterator i); 209 210template <class Iterator> 211class move_iterator { 212public: 213 typedef Iterator iterator_type; 214 typedef typename iterator_traits<Iterator>::difference_type difference_type; 215 typedef Iterator pointer; 216 typedef typename iterator_traits<Iterator>::value_type value_type; 217 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 218 typedef value_type&& reference; 219 220 constexpr move_iterator(); // all the constexprs are in C++17 221 constexpr explicit move_iterator(Iterator i); 222 template <class U> 223 constexpr move_iterator(const move_iterator<U>& u); 224 template <class U> 225 constexpr move_iterator& operator=(const move_iterator<U>& u); 226 constexpr iterator_type base() const; 227 constexpr reference operator*() const; 228 constexpr pointer operator->() const; 229 constexpr move_iterator& operator++(); 230 constexpr move_iterator operator++(int); 231 constexpr move_iterator& operator--(); 232 constexpr move_iterator operator--(int); 233 constexpr move_iterator operator+(difference_type n) const; 234 constexpr move_iterator& operator+=(difference_type n); 235 constexpr move_iterator operator-(difference_type n) const; 236 constexpr move_iterator& operator-=(difference_type n); 237 constexpr unspecified operator[](difference_type n) const; 238private: 239 Iterator current; // exposition only 240}; 241 242template <class Iterator1, class Iterator2> 243constexpr bool // constexpr in C++17 244operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 245 246template <class Iterator1, class Iterator2> 247constexpr bool // constexpr in C++17 248operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 249 250template <class Iterator1, class Iterator2> 251constexpr bool // constexpr in C++17 252operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 253 254template <class Iterator1, class Iterator2> 255constexpr bool // constexpr in C++17 256operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 257 258template <class Iterator1, class Iterator2> 259constexpr bool // constexpr in C++17 260operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 261 262template <class Iterator1, class Iterator2> 263constexpr bool // constexpr in C++17 264operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 265 266template <class Iterator1, class Iterator2> 267constexpr auto // constexpr in C++17 268operator-(const move_iterator<Iterator1>& x, 269 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 270 271template <class Iterator> 272constexpr move_iterator<Iterator> operator+( // constexpr in C++17 273 typename move_iterator<Iterator>::difference_type n, 274 const move_iterator<Iterator>& x); 275 276template <class Iterator> // constexpr in C++17 277constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 278 279 280template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 281class istream_iterator 282 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> 283{ 284public: 285 typedef charT char_type; 286 typedef traits traits_type; 287 typedef basic_istream<charT,traits> istream_type; 288 289 constexpr istream_iterator(); 290 istream_iterator(istream_type& s); 291 istream_iterator(const istream_iterator& x); 292 ~istream_iterator(); 293 294 const T& operator*() const; 295 const T* operator->() const; 296 istream_iterator& operator++(); 297 istream_iterator operator++(int); 298}; 299 300template <class T, class charT, class traits, class Distance> 301bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 302 const istream_iterator<T,charT,traits,Distance>& y); 303template <class T, class charT, class traits, class Distance> 304bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 305 const istream_iterator<T,charT,traits,Distance>& y); 306 307template <class T, class charT = char, class traits = char_traits<charT> > 308class ostream_iterator 309 : public iterator<output_iterator_tag, void, void, void ,void> 310{ 311public: 312 typedef charT char_type; 313 typedef traits traits_type; 314 typedef basic_ostream<charT,traits> ostream_type; 315 316 ostream_iterator(ostream_type& s); 317 ostream_iterator(ostream_type& s, const charT* delimiter); 318 ostream_iterator(const ostream_iterator& x); 319 ~ostream_iterator(); 320 ostream_iterator& operator=(const T& value); 321 322 ostream_iterator& operator*(); 323 ostream_iterator& operator++(); 324 ostream_iterator& operator++(int); 325}; 326 327template<class charT, class traits = char_traits<charT> > 328class istreambuf_iterator 329 : public iterator<input_iterator_tag, charT, 330 typename traits::off_type, unspecified, 331 charT> 332{ 333public: 334 typedef charT char_type; 335 typedef traits traits_type; 336 typedef typename traits::int_type int_type; 337 typedef basic_streambuf<charT,traits> streambuf_type; 338 typedef basic_istream<charT,traits> istream_type; 339 340 istreambuf_iterator() noexcept; 341 istreambuf_iterator(istream_type& s) noexcept; 342 istreambuf_iterator(streambuf_type* s) noexcept; 343 istreambuf_iterator(a-private-type) noexcept; 344 345 charT operator*() const; 346 pointer operator->() const; 347 istreambuf_iterator& operator++(); 348 a-private-type operator++(int); 349 350 bool equal(const istreambuf_iterator& b) const; 351}; 352 353template <class charT, class traits> 354bool operator==(const istreambuf_iterator<charT,traits>& a, 355 const istreambuf_iterator<charT,traits>& b); 356template <class charT, class traits> 357bool operator!=(const istreambuf_iterator<charT,traits>& a, 358 const istreambuf_iterator<charT,traits>& b); 359 360template <class charT, class traits = char_traits<charT> > 361class ostreambuf_iterator 362 : public iterator<output_iterator_tag, void, void, void, void> 363{ 364public: 365 typedef charT char_type; 366 typedef traits traits_type; 367 typedef basic_streambuf<charT,traits> streambuf_type; 368 typedef basic_ostream<charT,traits> ostream_type; 369 370 ostreambuf_iterator(ostream_type& s) noexcept; 371 ostreambuf_iterator(streambuf_type* s) noexcept; 372 ostreambuf_iterator& operator=(charT c); 373 ostreambuf_iterator& operator*(); 374 ostreambuf_iterator& operator++(); 375 ostreambuf_iterator& operator++(int); 376 bool failed() const noexcept; 377}; 378 379template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 380template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 381template <class C> constexpr auto end(C& c) -> decltype(c.end()); 382template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 383template <class T, size_t N> constexpr T* begin(T (&array)[N]); 384template <class T, size_t N> constexpr T* end(T (&array)[N]); 385 386template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 387template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 388template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 389template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 390template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 391template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 392template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 393template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 394template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 395template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 396template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 397template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 398 399// 24.8, container access: 400template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 401template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 402 403template <class C> constexpr auto ssize(const C& c) 404 -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 405template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 406 407template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 408template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 409template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 410template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 411template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 412template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 413template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 414 415} // std 416 417*/ 418 419#include <__config> 420#include <iosfwd> // for forward declarations of vector and string. 421#include <__functional_base> 422#include <type_traits> 423#include <cstddef> 424#include <initializer_list> 425#include <version> 426#ifdef __APPLE__ 427#include <Availability.h> 428#endif 429 430#include <__debug> 431 432#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 433#pragma GCC system_header 434#endif 435 436_LIBCPP_BEGIN_NAMESPACE_STD 437template <class _Iter> 438struct _LIBCPP_TEMPLATE_VIS iterator_traits; 439 440struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {}; 441struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {}; 442struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag : public input_iterator_tag {}; 443struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {}; 444struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {}; 445#if _LIBCPP_STD_VER > 17 446// TODO(EricWF) contiguous_iterator_tag is provided as an extension prior to 447// C++20 to allow optimizations for users providing wrapped iterator types. 448struct _LIBCPP_TEMPLATE_VIS contiguous_iterator_tag: public random_access_iterator_tag { }; 449#endif 450 451template <class _Iter> 452struct __iter_traits_cache { 453 using type = _If< 454 __is_primary_template<iterator_traits<_Iter> >::value, 455 _Iter, 456 iterator_traits<_Iter> 457 >; 458}; 459template <class _Iter> 460using _ITER_TRAITS = typename __iter_traits_cache<_Iter>::type; 461 462struct __iter_concept_concept_test { 463 template <class _Iter> 464 using _Apply = typename _ITER_TRAITS<_Iter>::iterator_concept; 465}; 466struct __iter_concept_category_test { 467 template <class _Iter> 468 using _Apply = typename _ITER_TRAITS<_Iter>::iterator_category; 469}; 470struct __iter_concept_random_fallback { 471 template <class _Iter> 472 using _Apply = _EnableIf< 473 __is_primary_template<iterator_traits<_Iter> >::value, 474 random_access_iterator_tag 475 >; 476}; 477 478template <class _Iter, class _Tester> struct __test_iter_concept 479 : _IsValidExpansion<_Tester::template _Apply, _Iter>, 480 _Tester 481{ 482}; 483 484template <class _Iter> 485struct __iter_concept_cache { 486 using type = _Or< 487 __test_iter_concept<_Iter, __iter_concept_concept_test>, 488 __test_iter_concept<_Iter, __iter_concept_category_test>, 489 __test_iter_concept<_Iter, __iter_concept_random_fallback> 490 >; 491}; 492 493template <class _Iter> 494using _ITER_CONCEPT = typename __iter_concept_cache<_Iter>::type::template _Apply<_Iter>; 495 496 497template <class _Tp> 498struct __has_iterator_typedefs 499{ 500private: 501 struct __two {char __lx; char __lxx;}; 502 template <class _Up> static __two __test(...); 503 template <class _Up> static char __test(typename std::__void_t<typename _Up::iterator_category>::type* = 0, 504 typename std::__void_t<typename _Up::difference_type>::type* = 0, 505 typename std::__void_t<typename _Up::value_type>::type* = 0, 506 typename std::__void_t<typename _Up::reference>::type* = 0, 507 typename std::__void_t<typename _Up::pointer>::type* = 0 508 ); 509public: 510 static const bool value = sizeof(__test<_Tp>(0,0,0,0,0)) == 1; 511}; 512 513 514template <class _Tp> 515struct __has_iterator_category 516{ 517private: 518 struct __two {char __lx; char __lxx;}; 519 template <class _Up> static __two __test(...); 520 template <class _Up> static char __test(typename _Up::iterator_category* = 0); 521public: 522 static const bool value = sizeof(__test<_Tp>(0)) == 1; 523}; 524 525template <class _Iter, bool> struct __iterator_traits_impl {}; 526 527template <class _Iter> 528struct __iterator_traits_impl<_Iter, true> 529{ 530 typedef typename _Iter::difference_type difference_type; 531 typedef typename _Iter::value_type value_type; 532 typedef typename _Iter::pointer pointer; 533 typedef typename _Iter::reference reference; 534 typedef typename _Iter::iterator_category iterator_category; 535}; 536 537template <class _Iter, bool> struct __iterator_traits {}; 538 539template <class _Iter> 540struct __iterator_traits<_Iter, true> 541 : __iterator_traits_impl 542 < 543 _Iter, 544 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value || 545 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value 546 > 547{}; 548 549// iterator_traits<Iterator> will only have the nested types if Iterator::iterator_category 550// exists. Else iterator_traits<Iterator> will be an empty class. This is a 551// conforming extension which allows some programs to compile and behave as 552// the client expects instead of failing at compile time. 553 554template <class _Iter> 555struct _LIBCPP_TEMPLATE_VIS iterator_traits 556 : __iterator_traits<_Iter, __has_iterator_typedefs<_Iter>::value> { 557 558 using __primary_template = iterator_traits; 559}; 560 561template<class _Tp> 562struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*> 563{ 564 typedef ptrdiff_t difference_type; 565 typedef typename remove_cv<_Tp>::type value_type; 566 typedef _Tp* pointer; 567 typedef _Tp& reference; 568 typedef random_access_iterator_tag iterator_category; 569#if _LIBCPP_STD_VER > 17 570 typedef contiguous_iterator_tag iterator_concept; 571#endif 572}; 573 574template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value> 575struct __has_iterator_category_convertible_to 576 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value> 577{}; 578 579template <class _Tp, class _Up> 580struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {}; 581 582template <class _Tp> 583struct __is_cpp17_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {}; 584 585template <class _Tp> 586struct __is_cpp17_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {}; 587 588template <class _Tp> 589struct __is_cpp17_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {}; 590 591template <class _Tp> 592struct __is_cpp17_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {}; 593 594#if _LIBCPP_STD_VER > 17 595template <class _Tp> 596struct __is_cpp17_contiguous_iterator : public __has_iterator_category_convertible_to<_Tp, contiguous_iterator_tag> {}; 597#else 598template <class _Tp> 599struct __is_cpp17_contiguous_iterator : public false_type {}; 600#endif 601 602 603template <class _Tp> 604struct __is_exactly_cpp17_input_iterator 605 : public integral_constant<bool, 606 __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && 607 !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; 608 609#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 610template<class _InputIterator> 611using __iter_value_type = typename iterator_traits<_InputIterator>::value_type; 612 613template<class _InputIterator> 614using __iter_key_type = remove_const_t<typename iterator_traits<_InputIterator>::value_type::first_type>; 615 616template<class _InputIterator> 617using __iter_mapped_type = typename iterator_traits<_InputIterator>::value_type::second_type; 618 619template<class _InputIterator> 620using __iter_to_alloc_type = pair< 621 add_const_t<typename iterator_traits<_InputIterator>::value_type::first_type>, 622 typename iterator_traits<_InputIterator>::value_type::second_type>; 623#endif 624 625template<class _Category, class _Tp, class _Distance = ptrdiff_t, 626 class _Pointer = _Tp*, class _Reference = _Tp&> 627struct _LIBCPP_TEMPLATE_VIS iterator 628{ 629 typedef _Tp value_type; 630 typedef _Distance difference_type; 631 typedef _Pointer pointer; 632 typedef _Reference reference; 633 typedef _Category iterator_category; 634}; 635 636template <class _InputIter> 637inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 638void __advance(_InputIter& __i, 639 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 640{ 641 for (; __n > 0; --__n) 642 ++__i; 643} 644 645template <class _BiDirIter> 646inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 647void __advance(_BiDirIter& __i, 648 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 649{ 650 if (__n >= 0) 651 for (; __n > 0; --__n) 652 ++__i; 653 else 654 for (; __n < 0; ++__n) 655 --__i; 656} 657 658template <class _RandIter> 659inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 660void __advance(_RandIter& __i, 661 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 662{ 663 __i += __n; 664} 665 666template <class _InputIter> 667inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 668void advance(_InputIter& __i, 669 typename iterator_traits<_InputIter>::difference_type __n) 670{ 671 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 672 "Attempt to advance(it, -n) on a non-bidi iterator"); 673 __advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 674} 675 676template <class _InputIter> 677inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 678typename iterator_traits<_InputIter>::difference_type 679__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 680{ 681 typename iterator_traits<_InputIter>::difference_type __r(0); 682 for (; __first != __last; ++__first) 683 ++__r; 684 return __r; 685} 686 687template <class _RandIter> 688inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 689typename iterator_traits<_RandIter>::difference_type 690__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 691{ 692 return __last - __first; 693} 694 695template <class _InputIter> 696inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 697typename iterator_traits<_InputIter>::difference_type 698distance(_InputIter __first, _InputIter __last) 699{ 700 return __distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 701} 702 703template <class _InputIter> 704inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 705typename enable_if 706< 707 __is_cpp17_input_iterator<_InputIter>::value, 708 _InputIter 709>::type 710next(_InputIter __x, 711 typename iterator_traits<_InputIter>::difference_type __n = 1) 712{ 713 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 714 "Attempt to next(it, -n) on a non-bidi iterator"); 715 716 _VSTD::advance(__x, __n); 717 return __x; 718} 719 720template <class _InputIter> 721inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 722typename enable_if 723< 724 __is_cpp17_input_iterator<_InputIter>::value, 725 _InputIter 726>::type 727prev(_InputIter __x, 728 typename iterator_traits<_InputIter>::difference_type __n = 1) 729{ 730 _LIBCPP_ASSERT(__n <= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 731 "Attempt to prev(it, +n) on a non-bidi iterator"); 732 _VSTD::advance(__x, -__n); 733 return __x; 734} 735 736 737template <class _Tp, class = void> 738struct __is_stashing_iterator : false_type {}; 739 740template <class _Tp> 741struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 742 : true_type {}; 743 744template <class _Iter> 745class _LIBCPP_TEMPLATE_VIS reverse_iterator 746 : public iterator<typename iterator_traits<_Iter>::iterator_category, 747 typename iterator_traits<_Iter>::value_type, 748 typename iterator_traits<_Iter>::difference_type, 749 typename iterator_traits<_Iter>::pointer, 750 typename iterator_traits<_Iter>::reference> 751{ 752private: 753 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 754 755 static_assert(!__is_stashing_iterator<_Iter>::value, 756 "The specified iterator type cannot be used with reverse_iterator; " 757 "Using stashing iterators with reverse_iterator causes undefined behavior"); 758 759protected: 760 _Iter current; 761public: 762 typedef _Iter iterator_type; 763 typedef typename iterator_traits<_Iter>::difference_type difference_type; 764 typedef typename iterator_traits<_Iter>::reference reference; 765 typedef typename iterator_traits<_Iter>::pointer pointer; 766 767 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 768 reverse_iterator() : __t(), current() {} 769 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 770 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 771 template <class _Up> 772 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 773 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 774 template <class _Up> 775 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 776 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 777 { __t = current = __u.base(); return *this; } 778 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 779 _Iter base() const {return current;} 780 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 781 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 782 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 783 pointer operator->() const {return _VSTD::addressof(operator*());} 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--() {++current; return *this;} 790 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 791 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 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 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 798 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 799 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 800 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 801 reference operator[](difference_type __n) const {return *(*this + __n);} 802}; 803 804template <class _Iter1, class _Iter2> 805inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 806bool 807operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 808{ 809 return __x.base() == __y.base(); 810} 811 812template <class _Iter1, class _Iter2> 813inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 814bool 815operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 816{ 817 return __x.base() > __y.base(); 818} 819 820template <class _Iter1, class _Iter2> 821inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 822bool 823operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 824{ 825 return __x.base() != __y.base(); 826} 827 828template <class _Iter1, class _Iter2> 829inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 830bool 831operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 832{ 833 return __x.base() < __y.base(); 834} 835 836template <class _Iter1, class _Iter2> 837inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 838bool 839operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 840{ 841 return __x.base() <= __y.base(); 842} 843 844template <class _Iter1, class _Iter2> 845inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 846bool 847operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 848{ 849 return __x.base() >= __y.base(); 850} 851 852#ifndef _LIBCPP_CXX03_LANG 853template <class _Iter1, class _Iter2> 854inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 855auto 856operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 857-> decltype(__y.base() - __x.base()) 858{ 859 return __y.base() - __x.base(); 860} 861#else 862template <class _Iter1, class _Iter2> 863inline _LIBCPP_INLINE_VISIBILITY 864typename reverse_iterator<_Iter1>::difference_type 865operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 866{ 867 return __y.base() - __x.base(); 868} 869#endif 870 871template <class _Iter> 872inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 873reverse_iterator<_Iter> 874operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 875{ 876 return reverse_iterator<_Iter>(__x.base() - __n); 877} 878 879#if _LIBCPP_STD_VER > 11 880template <class _Iter> 881inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 882reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 883{ 884 return reverse_iterator<_Iter>(__i); 885} 886#endif 887 888template <class _Container> 889class _LIBCPP_TEMPLATE_VIS back_insert_iterator 890 : public iterator<output_iterator_tag, 891 void, 892 void, 893 void, 894 void> 895{ 896protected: 897 _Container* container; 898public: 899 typedef _Container container_type; 900 901 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 902 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 903 {container->push_back(__value_); return *this;} 904#ifndef _LIBCPP_CXX03_LANG 905 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 906 {container->push_back(_VSTD::move(__value_)); return *this;} 907#endif // _LIBCPP_CXX03_LANG 908 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 909 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 910 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 911}; 912 913template <class _Container> 914inline _LIBCPP_INLINE_VISIBILITY 915back_insert_iterator<_Container> 916back_inserter(_Container& __x) 917{ 918 return back_insert_iterator<_Container>(__x); 919} 920 921template <class _Container> 922class _LIBCPP_TEMPLATE_VIS front_insert_iterator 923 : public iterator<output_iterator_tag, 924 void, 925 void, 926 void, 927 void> 928{ 929protected: 930 _Container* container; 931public: 932 typedef _Container container_type; 933 934 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 935 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 936 {container->push_front(__value_); return *this;} 937#ifndef _LIBCPP_CXX03_LANG 938 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 939 {container->push_front(_VSTD::move(__value_)); return *this;} 940#endif // _LIBCPP_CXX03_LANG 941 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 942 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 943 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 944}; 945 946template <class _Container> 947inline _LIBCPP_INLINE_VISIBILITY 948front_insert_iterator<_Container> 949front_inserter(_Container& __x) 950{ 951 return front_insert_iterator<_Container>(__x); 952} 953 954template <class _Container> 955class _LIBCPP_TEMPLATE_VIS insert_iterator 956 : public iterator<output_iterator_tag, 957 void, 958 void, 959 void, 960 void> 961{ 962protected: 963 _Container* container; 964 typename _Container::iterator iter; 965public: 966 typedef _Container container_type; 967 968 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 969 : container(_VSTD::addressof(__x)), iter(__i) {} 970 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 971 {iter = container->insert(iter, __value_); ++iter; return *this;} 972#ifndef _LIBCPP_CXX03_LANG 973 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 974 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 975#endif // _LIBCPP_CXX03_LANG 976 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 977 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 978 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 979}; 980 981template <class _Container> 982inline _LIBCPP_INLINE_VISIBILITY 983insert_iterator<_Container> 984inserter(_Container& __x, typename _Container::iterator __i) 985{ 986 return insert_iterator<_Container>(__x, __i); 987} 988 989template <class _Tp, class _CharT = char, 990 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 991class _LIBCPP_TEMPLATE_VIS istream_iterator 992 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 993{ 994public: 995 typedef _CharT char_type; 996 typedef _Traits traits_type; 997 typedef basic_istream<_CharT,_Traits> istream_type; 998private: 999 istream_type* __in_stream_; 1000 _Tp __value_; 1001public: 1002 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(0), __value_() {} 1003 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 1004 { 1005 if (!(*__in_stream_ >> __value_)) 1006 __in_stream_ = 0; 1007 } 1008 1009 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 1010 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 1011 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 1012 { 1013 if (!(*__in_stream_ >> __value_)) 1014 __in_stream_ = 0; 1015 return *this; 1016 } 1017 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 1018 {istream_iterator __t(*this); ++(*this); return __t;} 1019 1020 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1021 friend _LIBCPP_INLINE_VISIBILITY 1022 bool 1023 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1024 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1025 1026 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1027 friend _LIBCPP_INLINE_VISIBILITY 1028 bool 1029 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1030 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1031}; 1032 1033template <class _Tp, class _CharT, class _Traits, class _Distance> 1034inline _LIBCPP_INLINE_VISIBILITY 1035bool 1036operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1037 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1038{ 1039 return __x.__in_stream_ == __y.__in_stream_; 1040} 1041 1042template <class _Tp, class _CharT, class _Traits, class _Distance> 1043inline _LIBCPP_INLINE_VISIBILITY 1044bool 1045operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1046 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1047{ 1048 return !(__x == __y); 1049} 1050 1051template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 1052class _LIBCPP_TEMPLATE_VIS ostream_iterator 1053 : public iterator<output_iterator_tag, void, void, void, void> 1054{ 1055public: 1056 typedef _CharT char_type; 1057 typedef _Traits traits_type; 1058 typedef basic_ostream<_CharT,_Traits> ostream_type; 1059private: 1060 ostream_type* __out_stream_; 1061 const char_type* __delim_; 1062public: 1063 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 1064 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {} 1065 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 1066 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 1067 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1068 { 1069 *__out_stream_ << __value_; 1070 if (__delim_) 1071 *__out_stream_ << __delim_; 1072 return *this; 1073 } 1074 1075 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1076 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1077 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1078}; 1079 1080template<class _CharT, class _Traits> 1081class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1082 : public iterator<input_iterator_tag, _CharT, 1083 typename _Traits::off_type, _CharT*, 1084 _CharT> 1085{ 1086public: 1087 typedef _CharT char_type; 1088 typedef _Traits traits_type; 1089 typedef typename _Traits::int_type int_type; 1090 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1091 typedef basic_istream<_CharT,_Traits> istream_type; 1092private: 1093 mutable streambuf_type* __sbuf_; 1094 1095 class __proxy 1096 { 1097 char_type __keep_; 1098 streambuf_type* __sbuf_; 1099 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1100 : __keep_(__c), __sbuf_(__s) {} 1101 friend class istreambuf_iterator; 1102 public: 1103 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1104 }; 1105 1106 _LIBCPP_INLINE_VISIBILITY 1107 bool __test_for_eof() const 1108 { 1109 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1110 __sbuf_ = 0; 1111 return __sbuf_ == 0; 1112 } 1113public: 1114 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} 1115 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1116 : __sbuf_(__s.rdbuf()) {} 1117 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1118 : __sbuf_(__s) {} 1119 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1120 : __sbuf_(__p.__sbuf_) {} 1121 1122 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1123 {return static_cast<char_type>(__sbuf_->sgetc());} 1124 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1125 { 1126 __sbuf_->sbumpc(); 1127 return *this; 1128 } 1129 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1130 { 1131 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1132 } 1133 1134 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1135 {return __test_for_eof() == __b.__test_for_eof();} 1136}; 1137 1138template <class _CharT, class _Traits> 1139inline _LIBCPP_INLINE_VISIBILITY 1140bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1141 const istreambuf_iterator<_CharT,_Traits>& __b) 1142 {return __a.equal(__b);} 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> 1151class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1152 : public iterator<output_iterator_tag, void, void, void, void> 1153{ 1154public: 1155 typedef _CharT char_type; 1156 typedef _Traits traits_type; 1157 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1158 typedef basic_ostream<_CharT,_Traits> ostream_type; 1159private: 1160 streambuf_type* __sbuf_; 1161public: 1162 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1163 : __sbuf_(__s.rdbuf()) {} 1164 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1165 : __sbuf_(__s) {} 1166 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1167 { 1168 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1169 __sbuf_ = 0; 1170 return *this; 1171 } 1172 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1173 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1174 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1175 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;} 1176 1177 template <class _Ch, class _Tr> 1178 friend 1179 _LIBCPP_HIDDEN 1180 ostreambuf_iterator<_Ch, _Tr> 1181 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1182 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1183 ios_base& __iob, _Ch __fl); 1184}; 1185 1186template <class _Iter> 1187class _LIBCPP_TEMPLATE_VIS move_iterator 1188{ 1189private: 1190 _Iter __i; 1191public: 1192 typedef _Iter iterator_type; 1193 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1194 typedef typename iterator_traits<iterator_type>::value_type value_type; 1195 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1196 typedef iterator_type pointer; 1197#ifndef _LIBCPP_CXX03_LANG 1198 typedef typename iterator_traits<iterator_type>::reference __reference; 1199 typedef typename conditional< 1200 is_reference<__reference>::value, 1201 typename remove_reference<__reference>::type&&, 1202 __reference 1203 >::type reference; 1204#else 1205 typedef typename iterator_traits<iterator_type>::reference reference; 1206#endif 1207 1208 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1209 move_iterator() : __i() {} 1210 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1211 explicit move_iterator(_Iter __x) : __i(__x) {} 1212 template <class _Up> 1213 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1214 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1215 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1216 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1217 reference operator*() const { return static_cast<reference>(*__i); } 1218 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1219 pointer operator->() const { return __i;} 1220 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1221 move_iterator& operator++() {++__i; return *this;} 1222 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1223 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1224 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1225 move_iterator& operator--() {--__i; return *this;} 1226 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1227 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1228 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1229 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1230 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1231 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1232 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1233 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1234 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1235 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1236 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1237 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1238}; 1239 1240template <class _Iter1, class _Iter2> 1241inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1242bool 1243operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1244{ 1245 return __x.base() == __y.base(); 1246} 1247 1248template <class _Iter1, class _Iter2> 1249inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1250bool 1251operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1252{ 1253 return __x.base() < __y.base(); 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 1288#ifndef _LIBCPP_CXX03_LANG 1289template <class _Iter1, class _Iter2> 1290inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1291auto 1292operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1293-> decltype(__x.base() - __y.base()) 1294{ 1295 return __x.base() - __y.base(); 1296} 1297#else 1298template <class _Iter1, class _Iter2> 1299inline _LIBCPP_INLINE_VISIBILITY 1300typename move_iterator<_Iter1>::difference_type 1301operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1302{ 1303 return __x.base() - __y.base(); 1304} 1305#endif 1306 1307template <class _Iter> 1308inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1309move_iterator<_Iter> 1310operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1311{ 1312 return move_iterator<_Iter>(__x.base() + __n); 1313} 1314 1315template <class _Iter> 1316inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1317move_iterator<_Iter> 1318make_move_iterator(_Iter __i) 1319{ 1320 return move_iterator<_Iter>(__i); 1321} 1322 1323// __wrap_iter 1324 1325template <class _Iter> class __wrap_iter; 1326 1327template <class _Iter1, class _Iter2> 1328_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1329bool 1330operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1331 1332template <class _Iter1, class _Iter2> 1333_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1334bool 1335operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1336 1337template <class _Iter1, class _Iter2> 1338_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1339bool 1340operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 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 1357#ifndef _LIBCPP_CXX03_LANG 1358template <class _Iter1, class _Iter2> 1359_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1360auto 1361operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1362-> decltype(__x.base() - __y.base()); 1363#else 1364template <class _Iter1, class _Iter2> 1365_LIBCPP_INLINE_VISIBILITY 1366typename __wrap_iter<_Iter1>::difference_type 1367operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1368#endif 1369 1370template <class _Iter> 1371_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1372__wrap_iter<_Iter> 1373operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1374 1375template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1376template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1377template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op); 1378template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2); 1379 1380#if _LIBCPP_DEBUG_LEVEL < 2 1381 1382template <class _Tp> 1383_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1384typename enable_if 1385< 1386 is_trivially_copy_assignable<_Tp>::value, 1387 _Tp* 1388>::type 1389__unwrap_iter(__wrap_iter<_Tp*>); 1390 1391#else 1392 1393template <class _Tp> 1394inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1395typename enable_if 1396< 1397 is_trivially_copy_assignable<_Tp>::value, 1398 __wrap_iter<_Tp*> 1399>::type 1400__unwrap_iter(__wrap_iter<_Tp*> __i); 1401 1402#endif 1403 1404template <class _Iter> 1405class __wrap_iter 1406{ 1407public: 1408 typedef _Iter iterator_type; 1409 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1410 typedef typename iterator_traits<iterator_type>::value_type value_type; 1411 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1412 typedef typename iterator_traits<iterator_type>::pointer pointer; 1413 typedef typename iterator_traits<iterator_type>::reference reference; 1414private: 1415 iterator_type __i; 1416public: 1417 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1418#if _LIBCPP_STD_VER > 11 1419 : __i{} 1420#endif 1421 { 1422#if _LIBCPP_DEBUG_LEVEL >= 2 1423 __get_db()->__insert_i(this); 1424#endif 1425 } 1426 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1427 __wrap_iter(const __wrap_iter<_Up>& __u, 1428 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT 1429 : __i(__u.base()) 1430 { 1431#if _LIBCPP_DEBUG_LEVEL >= 2 1432 __get_db()->__iterator_copy(this, &__u); 1433#endif 1434 } 1435#if _LIBCPP_DEBUG_LEVEL >= 2 1436 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1437 __wrap_iter(const __wrap_iter& __x) 1438 : __i(__x.base()) 1439 { 1440 __get_db()->__iterator_copy(this, &__x); 1441 } 1442 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1443 __wrap_iter& operator=(const __wrap_iter& __x) 1444 { 1445 if (this != &__x) 1446 { 1447 __get_db()->__iterator_copy(this, &__x); 1448 __i = __x.__i; 1449 } 1450 return *this; 1451 } 1452 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1453 ~__wrap_iter() 1454 { 1455 __get_db()->__erase_i(this); 1456 } 1457#endif 1458 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1459 { 1460#if _LIBCPP_DEBUG_LEVEL >= 2 1461 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1462 "Attempted to dereference a non-dereferenceable iterator"); 1463#endif 1464 return *__i; 1465 } 1466 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1467 { 1468#if _LIBCPP_DEBUG_LEVEL >= 2 1469 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1470 "Attempted to dereference a non-dereferenceable iterator"); 1471#endif 1472 return (pointer)_VSTD::addressof(*__i); 1473 } 1474 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1475 { 1476#if _LIBCPP_DEBUG_LEVEL >= 2 1477 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1478 "Attempted to increment non-incrementable iterator"); 1479#endif 1480 ++__i; 1481 return *this; 1482 } 1483 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1484 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1485 1486 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1487 { 1488#if _LIBCPP_DEBUG_LEVEL >= 2 1489 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1490 "Attempted to decrement non-decrementable iterator"); 1491#endif 1492 --__i; 1493 return *this; 1494 } 1495 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1496 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1497 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1498 {__wrap_iter __w(*this); __w += __n; return __w;} 1499 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1500 { 1501#if _LIBCPP_DEBUG_LEVEL >= 2 1502 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1503 "Attempted to add/subtract iterator outside of valid range"); 1504#endif 1505 __i += __n; 1506 return *this; 1507 } 1508 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1509 {return *this + (-__n);} 1510 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1511 {*this += -__n; return *this;} 1512 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1513 { 1514#if _LIBCPP_DEBUG_LEVEL >= 2 1515 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1516 "Attempted to subscript iterator outside of valid range"); 1517#endif 1518 return __i[__n]; 1519 } 1520 1521 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1522 1523private: 1524#if _LIBCPP_DEBUG_LEVEL >= 2 1525 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1526 { 1527 __get_db()->__insert_ic(this, __p); 1528 } 1529#else 1530 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1531#endif 1532 1533 template <class _Up> friend class __wrap_iter; 1534 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1535 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1536 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1537 1538 template <class _Iter1, class _Iter2> 1539 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1540 bool 1541 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1542 1543 template <class _Iter1, class _Iter2> 1544 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1545 bool 1546 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1547 1548 template <class _Iter1, class _Iter2> 1549 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1550 bool 1551 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 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#ifndef _LIBCPP_CXX03_LANG 1569 template <class _Iter1, class _Iter2> 1570 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1571 auto 1572 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1573 -> decltype(__x.base() - __y.base()); 1574#else 1575 template <class _Iter1, class _Iter2> 1576 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1577 typename __wrap_iter<_Iter1>::difference_type 1578 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1579#endif 1580 1581 template <class _Iter1> 1582 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1583 __wrap_iter<_Iter1> 1584 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1585 1586 template <class _Ip, class _Op> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _Op copy(_Ip, _Ip, _Op); 1587 template <class _B1, class _B2> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _B2 copy_backward(_B1, _B1, _B2); 1588 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op); 1589 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2); 1590 1591#if _LIBCPP_DEBUG_LEVEL < 2 1592 template <class _Tp> 1593 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1594 typename enable_if 1595 < 1596 is_trivially_copy_assignable<_Tp>::value, 1597 _Tp* 1598 >::type 1599 __unwrap_iter(__wrap_iter<_Tp*>); 1600#else 1601 template <class _Tp> 1602 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1603 typename enable_if 1604 < 1605 is_trivially_copy_assignable<_Tp>::value, 1606 __wrap_iter<_Tp*> 1607 >::type 1608 __unwrap_iter(__wrap_iter<_Tp*> __i); 1609#endif 1610}; 1611 1612template <class _Iter1, class _Iter2> 1613inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1614bool 1615operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1616{ 1617 return __x.base() == __y.base(); 1618} 1619 1620template <class _Iter1, class _Iter2> 1621inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1622bool 1623operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1624{ 1625#if _LIBCPP_DEBUG_LEVEL >= 2 1626 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1627 "Attempted to compare incomparable iterators"); 1628#endif 1629 return __x.base() < __y.base(); 1630} 1631 1632template <class _Iter1, class _Iter2> 1633inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1634bool 1635operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1636{ 1637 return !(__x == __y); 1638} 1639 1640template <class _Iter1, class _Iter2> 1641inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1642bool 1643operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1644{ 1645 return __y < __x; 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> 1665inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1666bool 1667operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1668{ 1669 return !(__x == __y); 1670} 1671 1672template <class _Iter1> 1673inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1674bool 1675operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __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 1696#ifndef _LIBCPP_CXX03_LANG 1697template <class _Iter1, class _Iter2> 1698inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1699auto 1700operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1701-> decltype(__x.base() - __y.base()) 1702{ 1703#if _LIBCPP_DEBUG_LEVEL >= 2 1704 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1705 "Attempted to subtract incompatible iterators"); 1706#endif 1707 return __x.base() - __y.base(); 1708} 1709#else 1710template <class _Iter1, class _Iter2> 1711inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1712typename __wrap_iter<_Iter1>::difference_type 1713operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1714{ 1715#if _LIBCPP_DEBUG_LEVEL >= 2 1716 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1717 "Attempted to subtract incompatible iterators"); 1718#endif 1719 return __x.base() - __y.base(); 1720} 1721#endif 1722 1723template <class _Iter> 1724inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1725__wrap_iter<_Iter> 1726operator+(typename __wrap_iter<_Iter>::difference_type __n, 1727 __wrap_iter<_Iter> __x) _NOEXCEPT 1728{ 1729 __x += __n; 1730 return __x; 1731} 1732 1733template <class _Iter> 1734struct __libcpp_is_trivial_iterator 1735 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1736 1737template <class _Iter> 1738struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1739 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1740 1741template <class _Iter> 1742struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1743 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1744 1745template <class _Iter> 1746struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1747 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1748 1749 1750template <class _Tp, size_t _Np> 1751_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1752_Tp* 1753begin(_Tp (&__array)[_Np]) 1754{ 1755 return __array; 1756} 1757 1758template <class _Tp, size_t _Np> 1759_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1760_Tp* 1761end(_Tp (&__array)[_Np]) 1762{ 1763 return __array + _Np; 1764} 1765 1766#if !defined(_LIBCPP_CXX03_LANG) 1767 1768template <class _Cp> 1769_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1770auto 1771begin(_Cp& __c) -> decltype(__c.begin()) 1772{ 1773 return __c.begin(); 1774} 1775 1776template <class _Cp> 1777_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1778auto 1779begin(const _Cp& __c) -> decltype(__c.begin()) 1780{ 1781 return __c.begin(); 1782} 1783 1784template <class _Cp> 1785_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1786auto 1787end(_Cp& __c) -> decltype(__c.end()) 1788{ 1789 return __c.end(); 1790} 1791 1792template <class _Cp> 1793_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1794auto 1795end(const _Cp& __c) -> decltype(__c.end()) 1796{ 1797 return __c.end(); 1798} 1799 1800#if _LIBCPP_STD_VER > 11 1801 1802template <class _Tp, size_t _Np> 1803_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1804reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1805{ 1806 return reverse_iterator<_Tp*>(__array + _Np); 1807} 1808 1809template <class _Tp, size_t _Np> 1810_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1811reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1812{ 1813 return reverse_iterator<_Tp*>(__array); 1814} 1815 1816template <class _Ep> 1817_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1818reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1819{ 1820 return reverse_iterator<const _Ep*>(__il.end()); 1821} 1822 1823template <class _Ep> 1824_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1825reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1826{ 1827 return reverse_iterator<const _Ep*>(__il.begin()); 1828} 1829 1830template <class _Cp> 1831_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1832auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1833{ 1834 return _VSTD::begin(__c); 1835} 1836 1837template <class _Cp> 1838_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1839auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1840{ 1841 return _VSTD::end(__c); 1842} 1843 1844template <class _Cp> 1845_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1846auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1847{ 1848 return __c.rbegin(); 1849} 1850 1851template <class _Cp> 1852_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1853auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1854{ 1855 return __c.rbegin(); 1856} 1857 1858template <class _Cp> 1859_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1860auto rend(_Cp& __c) -> decltype(__c.rend()) 1861{ 1862 return __c.rend(); 1863} 1864 1865template <class _Cp> 1866_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1867auto rend(const _Cp& __c) -> decltype(__c.rend()) 1868{ 1869 return __c.rend(); 1870} 1871 1872template <class _Cp> 1873_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1874auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1875{ 1876 return _VSTD::rbegin(__c); 1877} 1878 1879template <class _Cp> 1880_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1881auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1882{ 1883 return _VSTD::rend(__c); 1884} 1885 1886#endif 1887 1888 1889#else // defined(_LIBCPP_CXX03_LANG) 1890 1891template <class _Cp> 1892_LIBCPP_INLINE_VISIBILITY 1893typename _Cp::iterator 1894begin(_Cp& __c) 1895{ 1896 return __c.begin(); 1897} 1898 1899template <class _Cp> 1900_LIBCPP_INLINE_VISIBILITY 1901typename _Cp::const_iterator 1902begin(const _Cp& __c) 1903{ 1904 return __c.begin(); 1905} 1906 1907template <class _Cp> 1908_LIBCPP_INLINE_VISIBILITY 1909typename _Cp::iterator 1910end(_Cp& __c) 1911{ 1912 return __c.end(); 1913} 1914 1915template <class _Cp> 1916_LIBCPP_INLINE_VISIBILITY 1917typename _Cp::const_iterator 1918end(const _Cp& __c) 1919{ 1920 return __c.end(); 1921} 1922 1923#endif // !defined(_LIBCPP_CXX03_LANG) 1924 1925#if _LIBCPP_STD_VER > 14 1926 1927// #if _LIBCPP_STD_VER > 11 1928// template <> 1929// struct _LIBCPP_TEMPLATE_VIS plus<void> 1930// { 1931// template <class _T1, class _T2> 1932// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1933// auto operator()(_T1&& __t, _T2&& __u) const 1934// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1935// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1936// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1937// typedef void is_transparent; 1938// }; 1939// #endif 1940 1941template <class _Cont> 1942_LIBCPP_INLINE_VISIBILITY 1943constexpr auto size(const _Cont& __c) 1944_NOEXCEPT_(noexcept(__c.size())) 1945-> decltype (__c.size()) 1946{ return __c.size(); } 1947 1948template <class _Tp, size_t _Sz> 1949_LIBCPP_INLINE_VISIBILITY 1950constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1951 1952#if _LIBCPP_STD_VER > 17 1953template <class _Cont> 1954_LIBCPP_INLINE_VISIBILITY 1955constexpr auto ssize(const _Cont& __c) 1956_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1957-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1958{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1959 1960template <class _Tp, ptrdiff_t _Sz> 1961_LIBCPP_INLINE_VISIBILITY 1962constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1963#endif 1964 1965template <class _Cont> 1966_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1967constexpr auto empty(const _Cont& __c) 1968_NOEXCEPT_(noexcept(__c.empty())) 1969-> decltype (__c.empty()) 1970{ return __c.empty(); } 1971 1972template <class _Tp, size_t _Sz> 1973_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1974constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1975 1976template <class _Ep> 1977_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1978constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1979 1980template <class _Cont> constexpr 1981_LIBCPP_INLINE_VISIBILITY 1982auto data(_Cont& __c) 1983_NOEXCEPT_(noexcept(__c.data())) 1984-> decltype (__c.data()) 1985{ return __c.data(); } 1986 1987template <class _Cont> constexpr 1988_LIBCPP_INLINE_VISIBILITY 1989auto data(const _Cont& __c) 1990_NOEXCEPT_(noexcept(__c.data())) 1991-> decltype (__c.data()) 1992{ return __c.data(); } 1993 1994template <class _Tp, size_t _Sz> 1995_LIBCPP_INLINE_VISIBILITY 1996constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1997 1998template <class _Ep> 1999_LIBCPP_INLINE_VISIBILITY 2000constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 2001#endif 2002 2003 2004_LIBCPP_END_NAMESPACE_STD 2005 2006#endif // _LIBCPP_ITERATOR 2007