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