1// -*- C++ -*- 2//===-------------------------- iterator ----------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_ITERATOR 11#define _LIBCPP_ITERATOR 12 13/* 14 iterator synopsis 15 16namespace std 17{ 18 19template<class Iterator> 20struct iterator_traits 21{ 22 typedef typename Iterator::difference_type difference_type; 23 typedef typename Iterator::value_type value_type; 24 typedef typename Iterator::pointer pointer; 25 typedef typename Iterator::reference reference; 26 typedef typename Iterator::iterator_category iterator_category; 27}; 28 29template<class T> 30struct iterator_traits<T*> 31{ 32 typedef ptrdiff_t difference_type; 33 typedef T value_type; 34 typedef T* pointer; 35 typedef T& reference; 36 typedef random_access_iterator_tag iterator_category; 37}; 38 39template<class Category, class T, class Distance = ptrdiff_t, 40 class Pointer = T*, class Reference = T&> 41struct iterator 42{ 43 typedef T value_type; 44 typedef Distance difference_type; 45 typedef Pointer pointer; 46 typedef Reference reference; 47 typedef Category iterator_category; 48}; 49 50struct input_iterator_tag {}; 51struct output_iterator_tag {}; 52struct forward_iterator_tag : public input_iterator_tag {}; 53struct bidirectional_iterator_tag : public forward_iterator_tag {}; 54struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 55 56// 27.4.3, iterator operations 57template <class InputIterator, class Distance> // constexpr in C++17 58 constexpr void advance(InputIterator& i, Distance n); 59 60template <class InputIterator> // constexpr in C++17 61 constexpr typename iterator_traits<InputIterator>::difference_type 62 distance(InputIterator first, InputIterator last); 63 64template <class InputIterator> // constexpr in C++17 65 constexpr InputIterator next(InputIterator x, 66typename iterator_traits<InputIterator>::difference_type n = 1); 67 68template <class BidirectionalIterator> // constexpr in C++17 69 constexpr BidirectionalIterator prev(BidirectionalIterator x, 70 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 71 72template <class Iterator> 73class reverse_iterator 74 : public iterator<typename iterator_traits<Iterator>::iterator_category, 75 typename iterator_traits<Iterator>::value_type, 76 typename iterator_traits<Iterator>::difference_type, 77 typename iterator_traits<Iterator>::pointer, 78 typename iterator_traits<Iterator>::reference> 79{ 80protected: 81 Iterator current; 82public: 83 typedef Iterator iterator_type; 84 typedef typename iterator_traits<Iterator>::difference_type difference_type; 85 typedef typename iterator_traits<Iterator>::reference reference; 86 typedef typename iterator_traits<Iterator>::pointer pointer; 87 88 constexpr reverse_iterator(); 89 constexpr explicit reverse_iterator(Iterator x); 90 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 91 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 92 constexpr Iterator base() const; 93 constexpr reference operator*() const; 94 constexpr pointer operator->() const; 95 constexpr reverse_iterator& operator++(); 96 constexpr reverse_iterator operator++(int); 97 constexpr reverse_iterator& operator--(); 98 constexpr reverse_iterator operator--(int); 99 constexpr reverse_iterator operator+ (difference_type n) const; 100 constexpr reverse_iterator& operator+=(difference_type n); 101 constexpr reverse_iterator operator- (difference_type n) const; 102 constexpr reverse_iterator& operator-=(difference_type n); 103 constexpr reference operator[](difference_type n) const; 104}; 105 106template <class Iterator1, class Iterator2> 107constexpr bool // constexpr in C++17 108operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 109 110template <class Iterator1, class Iterator2> 111constexpr bool // constexpr in C++17 112operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 113 114template <class Iterator1, class Iterator2> 115constexpr bool // constexpr in C++17 116operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 117 118template <class Iterator1, class Iterator2> 119constexpr bool // constexpr in C++17 120operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 121 122template <class Iterator1, class Iterator2> 123constexpr bool // constexpr in C++17 124operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 125 126template <class Iterator1, class Iterator2> 127constexpr bool // constexpr in C++17 128operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 129 130template <class Iterator1, class Iterator2> 131constexpr auto 132operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 133-> decltype(__y.base() - __x.base()); // constexpr in C++17 134 135template <class Iterator> 136constexpr reverse_iterator<Iterator> 137operator+(typename reverse_iterator<Iterator>::difference_type n, 138 const reverse_iterator<Iterator>& x); // constexpr in C++17 139 140template <class Iterator> 141constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 142 143template <class Container> 144class back_insert_iterator 145{ 146protected: 147 Container* container; 148public: 149 typedef Container container_type; 150 typedef void value_type; 151 typedef void difference_type; 152 typedef void reference; 153 typedef void pointer; 154 155 explicit back_insert_iterator(Container& x); 156 back_insert_iterator& operator=(const typename Container::value_type& value); 157 back_insert_iterator& operator*(); 158 back_insert_iterator& operator++(); 159 back_insert_iterator operator++(int); 160}; 161 162template <class Container> back_insert_iterator<Container> back_inserter(Container& x); 163 164template <class Container> 165class front_insert_iterator 166{ 167protected: 168 Container* container; 169public: 170 typedef Container container_type; 171 typedef void value_type; 172 typedef void difference_type; 173 typedef void reference; 174 typedef void pointer; 175 176 explicit front_insert_iterator(Container& x); 177 front_insert_iterator& operator=(const typename Container::value_type& value); 178 front_insert_iterator& operator*(); 179 front_insert_iterator& operator++(); 180 front_insert_iterator operator++(int); 181}; 182 183template <class Container> front_insert_iterator<Container> front_inserter(Container& x); 184 185template <class Container> 186class insert_iterator 187{ 188protected: 189 Container* container; 190 typename Container::iterator iter; 191public: 192 typedef Container container_type; 193 typedef void value_type; 194 typedef void difference_type; 195 typedef void reference; 196 typedef void pointer; 197 198 insert_iterator(Container& x, typename Container::iterator i); 199 insert_iterator& operator=(const typename Container::value_type& value); 200 insert_iterator& operator*(); 201 insert_iterator& operator++(); 202 insert_iterator& operator++(int); 203}; 204 205template <class Container, class Iterator> 206insert_iterator<Container> inserter(Container& x, Iterator i); 207 208template <class Iterator> 209class move_iterator { 210public: 211 typedef Iterator iterator_type; 212 typedef typename iterator_traits<Iterator>::difference_type difference_type; 213 typedef Iterator pointer; 214 typedef typename iterator_traits<Iterator>::value_type value_type; 215 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 216 typedef value_type&& reference; 217 218 constexpr move_iterator(); // all the constexprs are in C++17 219 constexpr explicit move_iterator(Iterator i); 220 template <class U> 221 constexpr move_iterator(const move_iterator<U>& u); 222 template <class U> 223 constexpr move_iterator& operator=(const move_iterator<U>& u); 224 constexpr iterator_type base() const; 225 constexpr reference operator*() const; 226 constexpr pointer operator->() const; 227 constexpr move_iterator& operator++(); 228 constexpr move_iterator operator++(int); 229 constexpr move_iterator& operator--(); 230 constexpr move_iterator operator--(int); 231 constexpr move_iterator operator+(difference_type n) const; 232 constexpr move_iterator& operator+=(difference_type n); 233 constexpr move_iterator operator-(difference_type n) const; 234 constexpr move_iterator& operator-=(difference_type n); 235 constexpr unspecified operator[](difference_type n) const; 236private: 237 Iterator current; // exposition only 238}; 239 240template <class Iterator1, class Iterator2> 241constexpr bool // constexpr in C++17 242operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 243 244template <class Iterator1, class Iterator2> 245constexpr bool // constexpr in C++17 246operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 247 248template <class Iterator1, class Iterator2> 249constexpr bool // constexpr in C++17 250operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 251 252template <class Iterator1, class Iterator2> 253constexpr bool // constexpr in C++17 254operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 255 256template <class Iterator1, class Iterator2> 257constexpr bool // constexpr in C++17 258operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 259 260template <class Iterator1, class Iterator2> 261constexpr bool // constexpr in C++17 262operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 263 264template <class Iterator1, class Iterator2> 265constexpr auto // constexpr in C++17 266operator-(const move_iterator<Iterator1>& x, 267 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 268 269template <class Iterator> 270constexpr move_iterator<Iterator> operator+( // constexpr in C++17 271 typename move_iterator<Iterator>::difference_type n, 272 const move_iterator<Iterator>& x); 273 274template <class Iterator> // constexpr in C++17 275constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 276 277 278template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 279class istream_iterator 280 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> 281{ 282public: 283 typedef charT char_type; 284 typedef traits traits_type; 285 typedef basic_istream<charT,traits> istream_type; 286 287 constexpr istream_iterator(); 288 istream_iterator(istream_type& s); 289 istream_iterator(const istream_iterator& x); 290 ~istream_iterator(); 291 292 const T& operator*() const; 293 const T* operator->() const; 294 istream_iterator& operator++(); 295 istream_iterator operator++(int); 296}; 297 298template <class T, class charT, class traits, class Distance> 299bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 300 const istream_iterator<T,charT,traits,Distance>& y); 301template <class T, class charT, class traits, class Distance> 302bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 303 const istream_iterator<T,charT,traits,Distance>& y); 304 305template <class T, class charT = char, class traits = char_traits<charT> > 306class ostream_iterator 307 : public iterator<output_iterator_tag, void, void, void ,void> 308{ 309public: 310 typedef charT char_type; 311 typedef traits traits_type; 312 typedef basic_ostream<charT,traits> ostream_type; 313 314 ostream_iterator(ostream_type& s); 315 ostream_iterator(ostream_type& s, const charT* delimiter); 316 ostream_iterator(const ostream_iterator& x); 317 ~ostream_iterator(); 318 ostream_iterator& operator=(const T& value); 319 320 ostream_iterator& operator*(); 321 ostream_iterator& operator++(); 322 ostream_iterator& operator++(int); 323}; 324 325template<class charT, class traits = char_traits<charT> > 326class istreambuf_iterator 327 : public iterator<input_iterator_tag, charT, 328 typename traits::off_type, unspecified, 329 charT> 330{ 331public: 332 typedef charT char_type; 333 typedef traits traits_type; 334 typedef typename traits::int_type int_type; 335 typedef basic_streambuf<charT,traits> streambuf_type; 336 typedef basic_istream<charT,traits> istream_type; 337 338 istreambuf_iterator() noexcept; 339 istreambuf_iterator(istream_type& s) noexcept; 340 istreambuf_iterator(streambuf_type* s) noexcept; 341 istreambuf_iterator(a-private-type) noexcept; 342 343 charT operator*() const; 344 pointer operator->() const; 345 istreambuf_iterator& operator++(); 346 a-private-type operator++(int); 347 348 bool equal(const istreambuf_iterator& b) const; 349}; 350 351template <class charT, class traits> 352bool operator==(const istreambuf_iterator<charT,traits>& a, 353 const istreambuf_iterator<charT,traits>& b); 354template <class charT, class traits> 355bool operator!=(const istreambuf_iterator<charT,traits>& a, 356 const istreambuf_iterator<charT,traits>& b); 357 358template <class charT, class traits = char_traits<charT> > 359class ostreambuf_iterator 360 : public iterator<output_iterator_tag, void, void, void, void> 361{ 362public: 363 typedef charT char_type; 364 typedef traits traits_type; 365 typedef basic_streambuf<charT,traits> streambuf_type; 366 typedef basic_ostream<charT,traits> ostream_type; 367 368 ostreambuf_iterator(ostream_type& s) noexcept; 369 ostreambuf_iterator(streambuf_type* s) noexcept; 370 ostreambuf_iterator& operator=(charT c); 371 ostreambuf_iterator& operator*(); 372 ostreambuf_iterator& operator++(); 373 ostreambuf_iterator& operator++(int); 374 bool failed() const noexcept; 375}; 376 377template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 378template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 379template <class C> constexpr auto end(C& c) -> decltype(c.end()); 380template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 381template <class T, size_t N> constexpr T* begin(T (&array)[N]); 382template <class T, size_t N> constexpr T* end(T (&array)[N]); 383 384template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 385template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 386template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 387template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 388template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 389template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 390template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 391template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 392template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 393template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 394template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 395template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 396 397// 24.8, container access: 398template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 399template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 400 401template <class C> constexpr auto ssize(const C& c) 402 -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>; // C++20 403template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20 404 405template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 406template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 407template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 408template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 409template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 410template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 411template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 412 413} // std 414 415*/ 416 417#include <__config> 418#include <iosfwd> // for forward declarations of vector and string. 419#include <__functional_base> 420#include <type_traits> 421#include <cstddef> 422#include <initializer_list> 423#include <version> 424#ifdef __APPLE__ 425#include <Availability.h> 426#endif 427 428#include <__debug> 429 430#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 431#pragma GCC system_header 432#endif 433 434_LIBCPP_BEGIN_NAMESPACE_STD 435template <class _Iter> 436struct _LIBCPP_TEMPLATE_VIS iterator_traits; 437 438struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {}; 439struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {}; 440struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag : public input_iterator_tag {}; 441struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {}; 442struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {}; 443#if _LIBCPP_STD_VER > 17 444// TODO(EricWF) contiguous_iterator_tag is provided as an extension prior to 445// C++20 to allow optimizations for users providing wrapped iterator types. 446struct _LIBCPP_TEMPLATE_VIS contiguous_iterator_tag: public random_access_iterator_tag { }; 447#endif 448 449template <class _Iter> 450struct __iter_traits_cache { 451 using type = _If< 452 __is_primary_template<iterator_traits<_Iter> >::value, 453 _Iter, 454 iterator_traits<_Iter> 455 >; 456}; 457template <class _Iter> 458using _ITER_TRAITS = typename __iter_traits_cache<_Iter>::type; 459 460struct __iter_concept_concept_test { 461 template <class _Iter> 462 using _Apply = typename _ITER_TRAITS<_Iter>::iterator_concept; 463}; 464struct __iter_concept_category_test { 465 template <class _Iter> 466 using _Apply = typename _ITER_TRAITS<_Iter>::iterator_category; 467}; 468struct __iter_concept_random_fallback { 469 template <class _Iter> 470 using _Apply = _EnableIf< 471 __is_primary_template<iterator_traits<_Iter> >::value, 472 random_access_iterator_tag 473 >; 474}; 475 476template <class _Iter, class _Tester> struct __test_iter_concept 477 : _IsValidExpansion<_Tester::template _Apply, _Iter>, 478 _Tester 479{ 480}; 481 482template <class _Iter> 483struct __iter_concept_cache { 484 using type = _Or< 485 __test_iter_concept<_Iter, __iter_concept_concept_test>, 486 __test_iter_concept<_Iter, __iter_concept_category_test>, 487 __test_iter_concept<_Iter, __iter_concept_random_fallback> 488 >; 489}; 490 491template <class _Iter> 492using _ITER_CONCEPT = typename __iter_concept_cache<_Iter>::type::template _Apply<_Iter>; 493 494 495template <class _Tp> 496struct __has_iterator_typedefs 497{ 498private: 499 struct __two {char __lx; char __lxx;}; 500 template <class _Up> static __two __test(...); 501 template <class _Up> static char __test(typename std::__void_t<typename _Up::iterator_category>::type* = 0, 502 typename std::__void_t<typename _Up::difference_type>::type* = 0, 503 typename std::__void_t<typename _Up::value_type>::type* = 0, 504 typename std::__void_t<typename _Up::reference>::type* = 0, 505 typename std::__void_t<typename _Up::pointer>::type* = 0 506 ); 507public: 508 static const bool value = sizeof(__test<_Tp>(0,0,0,0,0)) == 1; 509}; 510 511 512template <class _Tp> 513struct __has_iterator_category 514{ 515private: 516 struct __two {char __lx; char __lxx;}; 517 template <class _Up> static __two __test(...); 518 template <class _Up> static char __test(typename _Up::iterator_category* = 0); 519public: 520 static const bool value = sizeof(__test<_Tp>(0)) == 1; 521}; 522 523template <class _Iter, bool> struct __iterator_traits_impl {}; 524 525template <class _Iter> 526struct __iterator_traits_impl<_Iter, true> 527{ 528 typedef typename _Iter::difference_type difference_type; 529 typedef typename _Iter::value_type value_type; 530 typedef typename _Iter::pointer pointer; 531 typedef typename _Iter::reference reference; 532 typedef typename _Iter::iterator_category iterator_category; 533}; 534 535template <class _Iter, bool> struct __iterator_traits {}; 536 537template <class _Iter> 538struct __iterator_traits<_Iter, true> 539 : __iterator_traits_impl 540 < 541 _Iter, 542 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value || 543 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value 544 > 545{}; 546 547// iterator_traits<Iterator> will only have the nested types if Iterator::iterator_category 548// exists. Else iterator_traits<Iterator> will be an empty class. This is a 549// conforming extension which allows some programs to compile and behave as 550// the client expects instead of failing at compile time. 551 552template <class _Iter> 553struct _LIBCPP_TEMPLATE_VIS iterator_traits 554 : __iterator_traits<_Iter, __has_iterator_typedefs<_Iter>::value> { 555 556 using __primary_template = iterator_traits; 557}; 558 559template<class _Tp> 560struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*> 561{ 562 typedef ptrdiff_t difference_type; 563 typedef typename remove_cv<_Tp>::type value_type; 564 typedef _Tp* pointer; 565 typedef _Tp& reference; 566 typedef random_access_iterator_tag iterator_category; 567#if _LIBCPP_STD_VER > 17 568 typedef contiguous_iterator_tag iterator_concept; 569#endif 570}; 571 572template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value> 573struct __has_iterator_category_convertible_to 574 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value> 575{}; 576 577template <class _Tp, class _Up> 578struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {}; 579 580template <class _Tp> 581struct __is_cpp17_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {}; 582 583template <class _Tp> 584struct __is_cpp17_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {}; 585 586template <class _Tp> 587struct __is_cpp17_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {}; 588 589template <class _Tp> 590struct __is_cpp17_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {}; 591 592#if _LIBCPP_STD_VER > 17 593template <class _Tp> 594struct __is_cpp17_contiguous_iterator : public __has_iterator_category_convertible_to<_Tp, contiguous_iterator_tag> {}; 595#else 596template <class _Tp> 597struct __is_cpp17_contiguous_iterator : public false_type {}; 598#endif 599 600 601template <class _Tp> 602struct __is_exactly_cpp17_input_iterator 603 : public integral_constant<bool, 604 __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && 605 !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; 606 607#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 608template<class _InputIterator> 609using __iter_value_type = typename iterator_traits<_InputIterator>::value_type; 610 611template<class _InputIterator> 612using __iter_key_type = remove_const_t<typename iterator_traits<_InputIterator>::value_type::first_type>; 613 614template<class _InputIterator> 615using __iter_mapped_type = typename iterator_traits<_InputIterator>::value_type::second_type; 616 617template<class _InputIterator> 618using __iter_to_alloc_type = pair< 619 add_const_t<typename iterator_traits<_InputIterator>::value_type::first_type>, 620 typename iterator_traits<_InputIterator>::value_type::second_type>; 621#endif 622 623template<class _Category, class _Tp, class _Distance = ptrdiff_t, 624 class _Pointer = _Tp*, class _Reference = _Tp&> 625struct _LIBCPP_TEMPLATE_VIS iterator 626{ 627 typedef _Tp value_type; 628 typedef _Distance difference_type; 629 typedef _Pointer pointer; 630 typedef _Reference reference; 631 typedef _Category iterator_category; 632}; 633 634template <class _InputIter> 635inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 636void __advance(_InputIter& __i, 637 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 638{ 639 for (; __n > 0; --__n) 640 ++__i; 641} 642 643template <class _BiDirIter> 644inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 645void __advance(_BiDirIter& __i, 646 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 647{ 648 if (__n >= 0) 649 for (; __n > 0; --__n) 650 ++__i; 651 else 652 for (; __n < 0; ++__n) 653 --__i; 654} 655 656template <class _RandIter> 657inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 658void __advance(_RandIter& __i, 659 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 660{ 661 __i += __n; 662} 663 664template <class _InputIter, class _Distance> 665inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 666void advance(_InputIter& __i, _Distance __orig_n) 667{ 668 _LIBCPP_ASSERT(__orig_n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 669 "Attempt to advance(it, n) with negative n on a non-bidirectional iterator"); 670 typedef decltype(__convert_to_integral(__orig_n)) _IntegralSize; 671 _IntegralSize __n = __orig_n; 672 __advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 673} 674 675template <class _InputIter> 676inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 677typename iterator_traits<_InputIter>::difference_type 678__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 679{ 680 typename iterator_traits<_InputIter>::difference_type __r(0); 681 for (; __first != __last; ++__first) 682 ++__r; 683 return __r; 684} 685 686template <class _RandIter> 687inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 688typename iterator_traits<_RandIter>::difference_type 689__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 690{ 691 return __last - __first; 692} 693 694template <class _InputIter> 695inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 696typename iterator_traits<_InputIter>::difference_type 697distance(_InputIter __first, _InputIter __last) 698{ 699 return __distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 700} 701 702template <class _InputIter> 703inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 704typename enable_if 705< 706 __is_cpp17_input_iterator<_InputIter>::value, 707 _InputIter 708>::type 709next(_InputIter __x, 710 typename iterator_traits<_InputIter>::difference_type __n = 1) 711{ 712 _LIBCPP_ASSERT(__n >= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 713 "Attempt to next(it, n) with negative n on a non-bidirectional iterator"); 714 715 _VSTD::advance(__x, __n); 716 return __x; 717} 718 719template <class _InputIter> 720inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 721typename enable_if 722< 723 __is_cpp17_input_iterator<_InputIter>::value, 724 _InputIter 725>::type 726prev(_InputIter __x, 727 typename iterator_traits<_InputIter>::difference_type __n = 1) 728{ 729 _LIBCPP_ASSERT(__n <= 0 || __is_cpp17_bidirectional_iterator<_InputIter>::value, 730 "Attempt to prev(it, n) with a positive n on a non-bidirectional iterator"); 731 _VSTD::advance(__x, -__n); 732 return __x; 733} 734 735 736template <class _Tp, class = void> 737struct __is_stashing_iterator : false_type {}; 738 739template <class _Tp> 740struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 741 : true_type {}; 742 743template <class _Iter> 744class _LIBCPP_TEMPLATE_VIS reverse_iterator 745 : public iterator<typename iterator_traits<_Iter>::iterator_category, 746 typename iterator_traits<_Iter>::value_type, 747 typename iterator_traits<_Iter>::difference_type, 748 typename iterator_traits<_Iter>::pointer, 749 typename iterator_traits<_Iter>::reference> 750{ 751private: 752 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 753 754 static_assert(!__is_stashing_iterator<_Iter>::value, 755 "The specified iterator type cannot be used with reverse_iterator; " 756 "Using stashing iterators with reverse_iterator causes undefined behavior"); 757 758protected: 759 _Iter current; 760public: 761 typedef _Iter iterator_type; 762 typedef typename iterator_traits<_Iter>::difference_type difference_type; 763 typedef typename iterator_traits<_Iter>::reference reference; 764 typedef typename iterator_traits<_Iter>::pointer pointer; 765 766 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 767 reverse_iterator() : __t(), current() {} 768 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 769 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 770 template <class _Up> 771 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 772 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 773 template <class _Up> 774 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 775 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 776 { __t = current = __u.base(); return *this; } 777 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 778 _Iter base() const {return current;} 779 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 780 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 781 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 782 pointer operator->() const {return _VSTD::addressof(operator*());} 783 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 784 reverse_iterator& operator++() {--current; return *this;} 785 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 786 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 787 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 788 reverse_iterator& operator--() {++current; return *this;} 789 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 790 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 791 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 792 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 793 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 794 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 795 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 796 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 797 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 798 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 799 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 800 reference operator[](difference_type __n) const {return *(*this + __n);} 801}; 802 803template <class _Iter1, class _Iter2> 804inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 805bool 806operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 807{ 808 return __x.base() == __y.base(); 809} 810 811template <class _Iter1, class _Iter2> 812inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 813bool 814operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 815{ 816 return __x.base() > __y.base(); 817} 818 819template <class _Iter1, class _Iter2> 820inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 821bool 822operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 823{ 824 return __x.base() != __y.base(); 825} 826 827template <class _Iter1, class _Iter2> 828inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 829bool 830operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 831{ 832 return __x.base() < __y.base(); 833} 834 835template <class _Iter1, class _Iter2> 836inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 837bool 838operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 839{ 840 return __x.base() <= __y.base(); 841} 842 843template <class _Iter1, class _Iter2> 844inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 845bool 846operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 847{ 848 return __x.base() >= __y.base(); 849} 850 851#ifndef _LIBCPP_CXX03_LANG 852template <class _Iter1, class _Iter2> 853inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 854auto 855operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 856-> decltype(__y.base() - __x.base()) 857{ 858 return __y.base() - __x.base(); 859} 860#else 861template <class _Iter1, class _Iter2> 862inline _LIBCPP_INLINE_VISIBILITY 863typename reverse_iterator<_Iter1>::difference_type 864operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 865{ 866 return __y.base() - __x.base(); 867} 868#endif 869 870template <class _Iter> 871inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 872reverse_iterator<_Iter> 873operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 874{ 875 return reverse_iterator<_Iter>(__x.base() - __n); 876} 877 878#if _LIBCPP_STD_VER > 11 879template <class _Iter> 880inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 881reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 882{ 883 return reverse_iterator<_Iter>(__i); 884} 885#endif 886 887template <class _Container> 888class _LIBCPP_TEMPLATE_VIS back_insert_iterator 889 : public iterator<output_iterator_tag, 890 void, 891 void, 892 void, 893 void> 894{ 895protected: 896 _Container* container; 897public: 898 typedef _Container container_type; 899 900 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 901 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 902 {container->push_back(__value_); return *this;} 903#ifndef _LIBCPP_CXX03_LANG 904 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 905 {container->push_back(_VSTD::move(__value_)); return *this;} 906#endif // _LIBCPP_CXX03_LANG 907 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 908 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 909 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 910}; 911 912template <class _Container> 913inline _LIBCPP_INLINE_VISIBILITY 914back_insert_iterator<_Container> 915back_inserter(_Container& __x) 916{ 917 return back_insert_iterator<_Container>(__x); 918} 919 920template <class _Container> 921class _LIBCPP_TEMPLATE_VIS front_insert_iterator 922 : public iterator<output_iterator_tag, 923 void, 924 void, 925 void, 926 void> 927{ 928protected: 929 _Container* container; 930public: 931 typedef _Container container_type; 932 933 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 934 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 935 {container->push_front(__value_); return *this;} 936#ifndef _LIBCPP_CXX03_LANG 937 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 938 {container->push_front(_VSTD::move(__value_)); return *this;} 939#endif // _LIBCPP_CXX03_LANG 940 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 941 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 942 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 943}; 944 945template <class _Container> 946inline _LIBCPP_INLINE_VISIBILITY 947front_insert_iterator<_Container> 948front_inserter(_Container& __x) 949{ 950 return front_insert_iterator<_Container>(__x); 951} 952 953template <class _Container> 954class _LIBCPP_TEMPLATE_VIS insert_iterator 955 : public iterator<output_iterator_tag, 956 void, 957 void, 958 void, 959 void> 960{ 961protected: 962 _Container* container; 963 typename _Container::iterator iter; 964public: 965 typedef _Container container_type; 966 967 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 968 : container(_VSTD::addressof(__x)), iter(__i) {} 969 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 970 {iter = container->insert(iter, __value_); ++iter; return *this;} 971#ifndef _LIBCPP_CXX03_LANG 972 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 973 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 974#endif // _LIBCPP_CXX03_LANG 975 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 976 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 977 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 978}; 979 980template <class _Container> 981inline _LIBCPP_INLINE_VISIBILITY 982insert_iterator<_Container> 983inserter(_Container& __x, typename _Container::iterator __i) 984{ 985 return insert_iterator<_Container>(__x, __i); 986} 987 988template <class _Tp, class _CharT = char, 989 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 990class _LIBCPP_TEMPLATE_VIS istream_iterator 991 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 992{ 993public: 994 typedef _CharT char_type; 995 typedef _Traits traits_type; 996 typedef basic_istream<_CharT,_Traits> istream_type; 997private: 998 istream_type* __in_stream_; 999 _Tp __value_; 1000public: 1001 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(0), __value_() {} 1002 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 1003 { 1004 if (!(*__in_stream_ >> __value_)) 1005 __in_stream_ = 0; 1006 } 1007 1008 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 1009 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 1010 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 1011 { 1012 if (!(*__in_stream_ >> __value_)) 1013 __in_stream_ = 0; 1014 return *this; 1015 } 1016 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 1017 {istream_iterator __t(*this); ++(*this); return __t;} 1018 1019 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1020 friend _LIBCPP_INLINE_VISIBILITY 1021 bool 1022 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1023 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1024 1025 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 1026 friend _LIBCPP_INLINE_VISIBILITY 1027 bool 1028 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 1029 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 1030}; 1031 1032template <class _Tp, class _CharT, class _Traits, class _Distance> 1033inline _LIBCPP_INLINE_VISIBILITY 1034bool 1035operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1036 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1037{ 1038 return __x.__in_stream_ == __y.__in_stream_; 1039} 1040 1041template <class _Tp, class _CharT, class _Traits, class _Distance> 1042inline _LIBCPP_INLINE_VISIBILITY 1043bool 1044operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 1045 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 1046{ 1047 return !(__x == __y); 1048} 1049 1050template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 1051class _LIBCPP_TEMPLATE_VIS ostream_iterator 1052 : public iterator<output_iterator_tag, void, void, void, void> 1053{ 1054public: 1055 typedef _CharT char_type; 1056 typedef _Traits traits_type; 1057 typedef basic_ostream<_CharT,_Traits> ostream_type; 1058private: 1059 ostream_type* __out_stream_; 1060 const char_type* __delim_; 1061public: 1062 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 1063 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {} 1064 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 1065 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 1066 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1067 { 1068 *__out_stream_ << __value_; 1069 if (__delim_) 1070 *__out_stream_ << __delim_; 1071 return *this; 1072 } 1073 1074 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1075 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1076 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1077}; 1078 1079template<class _CharT, class _Traits> 1080class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1081 : public iterator<input_iterator_tag, _CharT, 1082 typename _Traits::off_type, _CharT*, 1083 _CharT> 1084{ 1085public: 1086 typedef _CharT char_type; 1087 typedef _Traits traits_type; 1088 typedef typename _Traits::int_type int_type; 1089 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1090 typedef basic_istream<_CharT,_Traits> istream_type; 1091private: 1092 mutable streambuf_type* __sbuf_; 1093 1094 class __proxy 1095 { 1096 char_type __keep_; 1097 streambuf_type* __sbuf_; 1098 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1099 : __keep_(__c), __sbuf_(__s) {} 1100 friend class istreambuf_iterator; 1101 public: 1102 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1103 }; 1104 1105 _LIBCPP_INLINE_VISIBILITY 1106 bool __test_for_eof() const 1107 { 1108 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1109 __sbuf_ = 0; 1110 return __sbuf_ == 0; 1111 } 1112public: 1113 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} 1114 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1115 : __sbuf_(__s.rdbuf()) {} 1116 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1117 : __sbuf_(__s) {} 1118 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1119 : __sbuf_(__p.__sbuf_) {} 1120 1121 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1122 {return static_cast<char_type>(__sbuf_->sgetc());} 1123 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1124 { 1125 __sbuf_->sbumpc(); 1126 return *this; 1127 } 1128 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1129 { 1130 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1131 } 1132 1133 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1134 {return __test_for_eof() == __b.__test_for_eof();} 1135}; 1136 1137template <class _CharT, class _Traits> 1138inline _LIBCPP_INLINE_VISIBILITY 1139bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1140 const istreambuf_iterator<_CharT,_Traits>& __b) 1141 {return __a.equal(__b);} 1142 1143template <class _CharT, class _Traits> 1144inline _LIBCPP_INLINE_VISIBILITY 1145bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1146 const istreambuf_iterator<_CharT,_Traits>& __b) 1147 {return !__a.equal(__b);} 1148 1149template <class _CharT, class _Traits> 1150class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1151 : public iterator<output_iterator_tag, void, void, void, void> 1152{ 1153public: 1154 typedef _CharT char_type; 1155 typedef _Traits traits_type; 1156 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1157 typedef basic_ostream<_CharT,_Traits> ostream_type; 1158private: 1159 streambuf_type* __sbuf_; 1160public: 1161 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1162 : __sbuf_(__s.rdbuf()) {} 1163 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1164 : __sbuf_(__s) {} 1165 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1166 { 1167 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1168 __sbuf_ = 0; 1169 return *this; 1170 } 1171 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1172 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1173 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1174 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;} 1175 1176 template <class _Ch, class _Tr> 1177 friend 1178 _LIBCPP_HIDDEN 1179 ostreambuf_iterator<_Ch, _Tr> 1180 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1181 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1182 ios_base& __iob, _Ch __fl); 1183}; 1184 1185template <class _Iter> 1186class _LIBCPP_TEMPLATE_VIS move_iterator 1187{ 1188private: 1189 _Iter __i; 1190public: 1191 typedef _Iter iterator_type; 1192 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1193 typedef typename iterator_traits<iterator_type>::value_type value_type; 1194 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1195 typedef iterator_type pointer; 1196#ifndef _LIBCPP_CXX03_LANG 1197 typedef typename iterator_traits<iterator_type>::reference __reference; 1198 typedef typename conditional< 1199 is_reference<__reference>::value, 1200 typename remove_reference<__reference>::type&&, 1201 __reference 1202 >::type reference; 1203#else 1204 typedef typename iterator_traits<iterator_type>::reference reference; 1205#endif 1206 1207 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1208 move_iterator() : __i() {} 1209 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1210 explicit move_iterator(_Iter __x) : __i(__x) {} 1211 template <class _Up> 1212 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1213 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1214 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1215 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1216 reference operator*() const { return static_cast<reference>(*__i); } 1217 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1218 pointer operator->() const { return __i;} 1219 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1220 move_iterator& operator++() {++__i; return *this;} 1221 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1222 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1223 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1224 move_iterator& operator--() {--__i; return *this;} 1225 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1226 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1227 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1228 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1229 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1230 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1231 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1232 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1233 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1234 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1235 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1236 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1237}; 1238 1239template <class _Iter1, class _Iter2> 1240inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1241bool 1242operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1243{ 1244 return __x.base() == __y.base(); 1245} 1246 1247template <class _Iter1, class _Iter2> 1248inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1249bool 1250operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1251{ 1252 return __x.base() < __y.base(); 1253} 1254 1255template <class _Iter1, class _Iter2> 1256inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1257bool 1258operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1259{ 1260 return __x.base() != __y.base(); 1261} 1262 1263template <class _Iter1, class _Iter2> 1264inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1265bool 1266operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1267{ 1268 return __x.base() > __y.base(); 1269} 1270 1271template <class _Iter1, class _Iter2> 1272inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1273bool 1274operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1275{ 1276 return __x.base() >= __y.base(); 1277} 1278 1279template <class _Iter1, class _Iter2> 1280inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1281bool 1282operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1283{ 1284 return __x.base() <= __y.base(); 1285} 1286 1287#ifndef _LIBCPP_CXX03_LANG 1288template <class _Iter1, class _Iter2> 1289inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1290auto 1291operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1292-> decltype(__x.base() - __y.base()) 1293{ 1294 return __x.base() - __y.base(); 1295} 1296#else 1297template <class _Iter1, class _Iter2> 1298inline _LIBCPP_INLINE_VISIBILITY 1299typename move_iterator<_Iter1>::difference_type 1300operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1301{ 1302 return __x.base() - __y.base(); 1303} 1304#endif 1305 1306template <class _Iter> 1307inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1308move_iterator<_Iter> 1309operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1310{ 1311 return move_iterator<_Iter>(__x.base() + __n); 1312} 1313 1314template <class _Iter> 1315inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1316move_iterator<_Iter> 1317make_move_iterator(_Iter __i) 1318{ 1319 return move_iterator<_Iter>(__i); 1320} 1321 1322// __wrap_iter 1323 1324template <class _Iter> class __wrap_iter; 1325 1326template <class _Iter1, class _Iter2> 1327_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1328bool 1329operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1330 1331template <class _Iter1, class _Iter2> 1332_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1333bool 1334operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1335 1336template <class _Iter1, class _Iter2> 1337_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1338bool 1339operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1340 1341template <class _Iter1, class _Iter2> 1342_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1343bool 1344operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1345 1346template <class _Iter1, class _Iter2> 1347_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1348bool 1349operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1350 1351template <class _Iter1, class _Iter2> 1352_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1353bool 1354operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1355 1356#ifndef _LIBCPP_CXX03_LANG 1357template <class _Iter1, class _Iter2> 1358_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1359auto 1360operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1361-> decltype(__x.base() - __y.base()); 1362#else 1363template <class _Iter1, class _Iter2> 1364_LIBCPP_INLINE_VISIBILITY 1365typename __wrap_iter<_Iter1>::difference_type 1366operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1367#endif 1368 1369template <class _Iter> 1370_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1371__wrap_iter<_Iter> 1372operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1373 1374template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy(_Ip, _Ip, _Op); 1375template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 copy_backward(_B1, _B1, _B2); 1376template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op); 1377template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2); 1378 1379#if _LIBCPP_DEBUG_LEVEL < 2 1380 1381template <class _Tp> 1382_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1383typename enable_if 1384< 1385 is_trivially_copy_assignable<_Tp>::value, 1386 _Tp* 1387>::type 1388__unwrap_iter(__wrap_iter<_Tp*>); 1389 1390#else 1391 1392template <class _Tp> 1393inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1394typename enable_if 1395< 1396 is_trivially_copy_assignable<_Tp>::value, 1397 __wrap_iter<_Tp*> 1398>::type 1399__unwrap_iter(__wrap_iter<_Tp*> __i); 1400 1401#endif 1402 1403template <class _Iter> 1404class __wrap_iter 1405{ 1406public: 1407 typedef _Iter iterator_type; 1408 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1409 typedef typename iterator_traits<iterator_type>::value_type value_type; 1410 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1411 typedef typename iterator_traits<iterator_type>::pointer pointer; 1412 typedef typename iterator_traits<iterator_type>::reference reference; 1413private: 1414 iterator_type __i; 1415public: 1416 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1417#if _LIBCPP_STD_VER > 11 1418 : __i{} 1419#endif 1420 { 1421#if _LIBCPP_DEBUG_LEVEL >= 2 1422 __get_db()->__insert_i(this); 1423#endif 1424 } 1425 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1426 __wrap_iter(const __wrap_iter<_Up>& __u, 1427 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT 1428 : __i(__u.base()) 1429 { 1430#if _LIBCPP_DEBUG_LEVEL >= 2 1431 __get_db()->__iterator_copy(this, &__u); 1432#endif 1433 } 1434#if _LIBCPP_DEBUG_LEVEL >= 2 1435 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1436 __wrap_iter(const __wrap_iter& __x) 1437 : __i(__x.base()) 1438 { 1439 __get_db()->__iterator_copy(this, &__x); 1440 } 1441 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1442 __wrap_iter& operator=(const __wrap_iter& __x) 1443 { 1444 if (this != &__x) 1445 { 1446 __get_db()->__iterator_copy(this, &__x); 1447 __i = __x.__i; 1448 } 1449 return *this; 1450 } 1451 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1452 ~__wrap_iter() 1453 { 1454 __get_db()->__erase_i(this); 1455 } 1456#endif 1457 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1458 { 1459#if _LIBCPP_DEBUG_LEVEL >= 2 1460 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1461 "Attempted to dereference a non-dereferenceable iterator"); 1462#endif 1463 return *__i; 1464 } 1465 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1466 { 1467#if _LIBCPP_DEBUG_LEVEL >= 2 1468 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1469 "Attempted to dereference a non-dereferenceable iterator"); 1470#endif 1471 return (pointer)_VSTD::addressof(*__i); 1472 } 1473 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1474 { 1475#if _LIBCPP_DEBUG_LEVEL >= 2 1476 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1477 "Attempted to increment non-incrementable iterator"); 1478#endif 1479 ++__i; 1480 return *this; 1481 } 1482 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1483 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1484 1485 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1486 { 1487#if _LIBCPP_DEBUG_LEVEL >= 2 1488 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1489 "Attempted to decrement non-decrementable iterator"); 1490#endif 1491 --__i; 1492 return *this; 1493 } 1494 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1495 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1496 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1497 {__wrap_iter __w(*this); __w += __n; return __w;} 1498 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1499 { 1500#if _LIBCPP_DEBUG_LEVEL >= 2 1501 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1502 "Attempted to add/subtract iterator outside of valid range"); 1503#endif 1504 __i += __n; 1505 return *this; 1506 } 1507 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1508 {return *this + (-__n);} 1509 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1510 {*this += -__n; return *this;} 1511 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1512 { 1513#if _LIBCPP_DEBUG_LEVEL >= 2 1514 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1515 "Attempted to subscript iterator outside of valid range"); 1516#endif 1517 return __i[__n]; 1518 } 1519 1520 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1521 1522private: 1523#if _LIBCPP_DEBUG_LEVEL >= 2 1524 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1525 { 1526 __get_db()->__insert_ic(this, __p); 1527 } 1528#else 1529 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1530#endif 1531 1532 template <class _Up> friend class __wrap_iter; 1533 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1534 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1535 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1536 1537 template <class _Iter1, class _Iter2> 1538 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1539 bool 1540 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1541 1542 template <class _Iter1, class _Iter2> 1543 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1544 bool 1545 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1546 1547 template <class _Iter1, class _Iter2> 1548 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1549 bool 1550 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1551 1552 template <class _Iter1, class _Iter2> 1553 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1554 bool 1555 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1556 1557 template <class _Iter1, class _Iter2> 1558 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1559 bool 1560 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1561 1562 template <class _Iter1, class _Iter2> 1563 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1564 bool 1565 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1566 1567#ifndef _LIBCPP_CXX03_LANG 1568 template <class _Iter1, class _Iter2> 1569 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1570 auto 1571 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1572 -> decltype(__x.base() - __y.base()); 1573#else 1574 template <class _Iter1, class _Iter2> 1575 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1576 typename __wrap_iter<_Iter1>::difference_type 1577 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1578#endif 1579 1580 template <class _Iter1> 1581 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1582 __wrap_iter<_Iter1> 1583 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1584 1585 template <class _Ip, class _Op> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _Op copy(_Ip, _Ip, _Op); 1586 template <class _B1, class _B2> friend _LIBCPP_CONSTEXPR_AFTER_CXX17 _B2 copy_backward(_B1, _B1, _B2); 1587 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op); 1588 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2); 1589 1590#if _LIBCPP_DEBUG_LEVEL < 2 1591 template <class _Tp> 1592 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1593 typename enable_if 1594 < 1595 is_trivially_copy_assignable<_Tp>::value, 1596 _Tp* 1597 >::type 1598 __unwrap_iter(__wrap_iter<_Tp*>); 1599#else 1600 template <class _Tp> 1601 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1602 typename enable_if 1603 < 1604 is_trivially_copy_assignable<_Tp>::value, 1605 __wrap_iter<_Tp*> 1606 >::type 1607 __unwrap_iter(__wrap_iter<_Tp*> __i); 1608#endif 1609}; 1610 1611template <class _Iter1, class _Iter2> 1612inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1613bool 1614operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1615{ 1616 return __x.base() == __y.base(); 1617} 1618 1619template <class _Iter1, class _Iter2> 1620inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1621bool 1622operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1623{ 1624#if _LIBCPP_DEBUG_LEVEL >= 2 1625 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1626 "Attempted to compare incomparable iterators"); 1627#endif 1628 return __x.base() < __y.base(); 1629} 1630 1631template <class _Iter1, class _Iter2> 1632inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1633bool 1634operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1635{ 1636 return !(__x == __y); 1637} 1638 1639template <class _Iter1, class _Iter2> 1640inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1641bool 1642operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1643{ 1644 return __y < __x; 1645} 1646 1647template <class _Iter1, class _Iter2> 1648inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1649bool 1650operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1651{ 1652 return !(__x < __y); 1653} 1654 1655template <class _Iter1, class _Iter2> 1656inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1657bool 1658operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1659{ 1660 return !(__y < __x); 1661} 1662 1663template <class _Iter1> 1664inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1665bool 1666operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1667{ 1668 return !(__x == __y); 1669} 1670 1671template <class _Iter1> 1672inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1673bool 1674operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1675{ 1676 return __y < __x; 1677} 1678 1679template <class _Iter1> 1680inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1681bool 1682operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1683{ 1684 return !(__x < __y); 1685} 1686 1687template <class _Iter1> 1688inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1689bool 1690operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1691{ 1692 return !(__y < __x); 1693} 1694 1695#ifndef _LIBCPP_CXX03_LANG 1696template <class _Iter1, class _Iter2> 1697inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1698auto 1699operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1700-> decltype(__x.base() - __y.base()) 1701{ 1702#if _LIBCPP_DEBUG_LEVEL >= 2 1703 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1704 "Attempted to subtract incompatible iterators"); 1705#endif 1706 return __x.base() - __y.base(); 1707} 1708#else 1709template <class _Iter1, class _Iter2> 1710inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1711typename __wrap_iter<_Iter1>::difference_type 1712operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1713{ 1714#if _LIBCPP_DEBUG_LEVEL >= 2 1715 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1716 "Attempted to subtract incompatible iterators"); 1717#endif 1718 return __x.base() - __y.base(); 1719} 1720#endif 1721 1722template <class _Iter> 1723inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1724__wrap_iter<_Iter> 1725operator+(typename __wrap_iter<_Iter>::difference_type __n, 1726 __wrap_iter<_Iter> __x) _NOEXCEPT 1727{ 1728 __x += __n; 1729 return __x; 1730} 1731 1732template <class _Iter> 1733struct __libcpp_is_trivial_iterator 1734 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1735 1736template <class _Iter> 1737struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1738 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1739 1740template <class _Iter> 1741struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1742 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1743 1744template <class _Iter> 1745struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1746 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1747 1748 1749template <class _Tp, size_t _Np> 1750_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1751_Tp* 1752begin(_Tp (&__array)[_Np]) 1753{ 1754 return __array; 1755} 1756 1757template <class _Tp, size_t _Np> 1758_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1759_Tp* 1760end(_Tp (&__array)[_Np]) 1761{ 1762 return __array + _Np; 1763} 1764 1765#if !defined(_LIBCPP_CXX03_LANG) 1766 1767template <class _Cp> 1768_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1769auto 1770begin(_Cp& __c) -> decltype(__c.begin()) 1771{ 1772 return __c.begin(); 1773} 1774 1775template <class _Cp> 1776_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1777auto 1778begin(const _Cp& __c) -> decltype(__c.begin()) 1779{ 1780 return __c.begin(); 1781} 1782 1783template <class _Cp> 1784_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1785auto 1786end(_Cp& __c) -> decltype(__c.end()) 1787{ 1788 return __c.end(); 1789} 1790 1791template <class _Cp> 1792_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1793auto 1794end(const _Cp& __c) -> decltype(__c.end()) 1795{ 1796 return __c.end(); 1797} 1798 1799#if _LIBCPP_STD_VER > 11 1800 1801template <class _Tp, size_t _Np> 1802_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1803reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1804{ 1805 return reverse_iterator<_Tp*>(__array + _Np); 1806} 1807 1808template <class _Tp, size_t _Np> 1809_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1810reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1811{ 1812 return reverse_iterator<_Tp*>(__array); 1813} 1814 1815template <class _Ep> 1816_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1817reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1818{ 1819 return reverse_iterator<const _Ep*>(__il.end()); 1820} 1821 1822template <class _Ep> 1823_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1824reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1825{ 1826 return reverse_iterator<const _Ep*>(__il.begin()); 1827} 1828 1829template <class _Cp> 1830_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1831auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1832{ 1833 return _VSTD::begin(__c); 1834} 1835 1836template <class _Cp> 1837_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1838auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1839{ 1840 return _VSTD::end(__c); 1841} 1842 1843template <class _Cp> 1844_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1845auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1846{ 1847 return __c.rbegin(); 1848} 1849 1850template <class _Cp> 1851_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1852auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1853{ 1854 return __c.rbegin(); 1855} 1856 1857template <class _Cp> 1858_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1859auto rend(_Cp& __c) -> decltype(__c.rend()) 1860{ 1861 return __c.rend(); 1862} 1863 1864template <class _Cp> 1865_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1866auto rend(const _Cp& __c) -> decltype(__c.rend()) 1867{ 1868 return __c.rend(); 1869} 1870 1871template <class _Cp> 1872_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1873auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1874{ 1875 return _VSTD::rbegin(__c); 1876} 1877 1878template <class _Cp> 1879_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1880auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1881{ 1882 return _VSTD::rend(__c); 1883} 1884 1885#endif 1886 1887 1888#else // defined(_LIBCPP_CXX03_LANG) 1889 1890template <class _Cp> 1891_LIBCPP_INLINE_VISIBILITY 1892typename _Cp::iterator 1893begin(_Cp& __c) 1894{ 1895 return __c.begin(); 1896} 1897 1898template <class _Cp> 1899_LIBCPP_INLINE_VISIBILITY 1900typename _Cp::const_iterator 1901begin(const _Cp& __c) 1902{ 1903 return __c.begin(); 1904} 1905 1906template <class _Cp> 1907_LIBCPP_INLINE_VISIBILITY 1908typename _Cp::iterator 1909end(_Cp& __c) 1910{ 1911 return __c.end(); 1912} 1913 1914template <class _Cp> 1915_LIBCPP_INLINE_VISIBILITY 1916typename _Cp::const_iterator 1917end(const _Cp& __c) 1918{ 1919 return __c.end(); 1920} 1921 1922#endif // !defined(_LIBCPP_CXX03_LANG) 1923 1924#if _LIBCPP_STD_VER > 14 1925 1926// #if _LIBCPP_STD_VER > 11 1927// template <> 1928// struct _LIBCPP_TEMPLATE_VIS plus<void> 1929// { 1930// template <class _T1, class _T2> 1931// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1932// auto operator()(_T1&& __t, _T2&& __u) const 1933// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1934// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1935// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1936// typedef void is_transparent; 1937// }; 1938// #endif 1939 1940template <class _Cont> 1941_LIBCPP_INLINE_VISIBILITY 1942constexpr auto size(const _Cont& __c) 1943_NOEXCEPT_(noexcept(__c.size())) 1944-> decltype (__c.size()) 1945{ return __c.size(); } 1946 1947template <class _Tp, size_t _Sz> 1948_LIBCPP_INLINE_VISIBILITY 1949constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1950 1951#if _LIBCPP_STD_VER > 17 1952template <class _Cont> 1953_LIBCPP_INLINE_VISIBILITY 1954constexpr auto ssize(const _Cont& __c) 1955_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1956-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1957{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1958 1959template <class _Tp, ptrdiff_t _Sz> 1960_LIBCPP_INLINE_VISIBILITY 1961constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1962#endif 1963 1964template <class _Cont> 1965_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1966constexpr auto empty(const _Cont& __c) 1967_NOEXCEPT_(noexcept(__c.empty())) 1968-> decltype (__c.empty()) 1969{ return __c.empty(); } 1970 1971template <class _Tp, size_t _Sz> 1972_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1973constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1974 1975template <class _Ep> 1976_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1977constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1978 1979template <class _Cont> constexpr 1980_LIBCPP_INLINE_VISIBILITY 1981auto data(_Cont& __c) 1982_NOEXCEPT_(noexcept(__c.data())) 1983-> decltype (__c.data()) 1984{ return __c.data(); } 1985 1986template <class _Cont> constexpr 1987_LIBCPP_INLINE_VISIBILITY 1988auto data(const _Cont& __c) 1989_NOEXCEPT_(noexcept(__c.data())) 1990-> decltype (__c.data()) 1991{ return __c.data(); } 1992 1993template <class _Tp, size_t _Sz> 1994_LIBCPP_INLINE_VISIBILITY 1995constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1996 1997template <class _Ep> 1998_LIBCPP_INLINE_VISIBILITY 1999constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 2000#endif 2001 2002 2003_LIBCPP_END_NAMESPACE_STD 2004 2005#endif // _LIBCPP_ITERATOR 2006