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 845template <class _Container> 846inline _LIBCPP_INLINE_VISIBILITY 847back_insert_iterator<_Container> 848back_inserter(_Container& __x) 849{ 850 return back_insert_iterator<_Container>(__x); 851} 852 853template <class _Container> 854class _LIBCPP_TEMPLATE_VIS front_insert_iterator 855 : public iterator<output_iterator_tag, 856 void, 857 void, 858 void, 859 void> 860{ 861protected: 862 _Container* container; 863public: 864 typedef _Container container_type; 865 866 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 867 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 868 {container->push_front(__value_); return *this;} 869#ifndef _LIBCPP_CXX03_LANG 870 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 871 {container->push_front(_VSTD::move(__value_)); return *this;} 872#endif // _LIBCPP_CXX03_LANG 873 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 874 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 875 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 876}; 877 878template <class _Container> 879inline _LIBCPP_INLINE_VISIBILITY 880front_insert_iterator<_Container> 881front_inserter(_Container& __x) 882{ 883 return front_insert_iterator<_Container>(__x); 884} 885 886template <class _Container> 887class _LIBCPP_TEMPLATE_VIS insert_iterator 888 : public iterator<output_iterator_tag, 889 void, 890 void, 891 void, 892 void> 893{ 894protected: 895 _Container* container; 896 typename _Container::iterator iter; 897public: 898 typedef _Container container_type; 899 900 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 901 : container(_VSTD::addressof(__x)), iter(__i) {} 902 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 903 {iter = container->insert(iter, __value_); ++iter; return *this;} 904#ifndef _LIBCPP_CXX03_LANG 905 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 906 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 907#endif // _LIBCPP_CXX03_LANG 908 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 909 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 910 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 911}; 912 913template <class _Container> 914inline _LIBCPP_INLINE_VISIBILITY 915insert_iterator<_Container> 916inserter(_Container& __x, typename _Container::iterator __i) 917{ 918 return insert_iterator<_Container>(__x, __i); 919} 920 921template <class _Tp, class _CharT = char, 922 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 923class _LIBCPP_TEMPLATE_VIS istream_iterator 924 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 925{ 926public: 927 typedef _CharT char_type; 928 typedef _Traits traits_type; 929 typedef basic_istream<_CharT,_Traits> istream_type; 930private: 931 istream_type* __in_stream_; 932 _Tp __value_; 933public: 934 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(0), __value_() {} 935 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 936 { 937 if (!(*__in_stream_ >> __value_)) 938 __in_stream_ = 0; 939 } 940 941 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 942 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 943 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 944 { 945 if (!(*__in_stream_ >> __value_)) 946 __in_stream_ = 0; 947 return *this; 948 } 949 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 950 {istream_iterator __t(*this); ++(*this); return __t;} 951 952 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 953 friend _LIBCPP_INLINE_VISIBILITY 954 bool 955 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 956 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 957 958 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 959 friend _LIBCPP_INLINE_VISIBILITY 960 bool 961 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 962 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 963}; 964 965template <class _Tp, class _CharT, class _Traits, class _Distance> 966inline _LIBCPP_INLINE_VISIBILITY 967bool 968operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 969 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 970{ 971 return __x.__in_stream_ == __y.__in_stream_; 972} 973 974template <class _Tp, class _CharT, class _Traits, class _Distance> 975inline _LIBCPP_INLINE_VISIBILITY 976bool 977operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 978 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 979{ 980 return !(__x == __y); 981} 982 983template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 984class _LIBCPP_TEMPLATE_VIS ostream_iterator 985 : public iterator<output_iterator_tag, void, void, void, void> 986{ 987public: 988 typedef _CharT char_type; 989 typedef _Traits traits_type; 990 typedef basic_ostream<_CharT,_Traits> ostream_type; 991private: 992 ostream_type* __out_stream_; 993 const char_type* __delim_; 994public: 995 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 996 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {} 997 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 998 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 999 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 1000 { 1001 *__out_stream_ << __value_; 1002 if (__delim_) 1003 *__out_stream_ << __delim_; 1004 return *this; 1005 } 1006 1007 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 1008 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 1009 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 1010}; 1011 1012template<class _CharT, class _Traits> 1013class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 1014 : public iterator<input_iterator_tag, _CharT, 1015 typename _Traits::off_type, _CharT*, 1016 _CharT> 1017{ 1018public: 1019 typedef _CharT char_type; 1020 typedef _Traits traits_type; 1021 typedef typename _Traits::int_type int_type; 1022 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1023 typedef basic_istream<_CharT,_Traits> istream_type; 1024private: 1025 mutable streambuf_type* __sbuf_; 1026 1027 class __proxy 1028 { 1029 char_type __keep_; 1030 streambuf_type* __sbuf_; 1031 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1032 : __keep_(__c), __sbuf_(__s) {} 1033 friend class istreambuf_iterator; 1034 public: 1035 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1036 }; 1037 1038 _LIBCPP_INLINE_VISIBILITY 1039 bool __test_for_eof() const 1040 { 1041 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1042 __sbuf_ = 0; 1043 return __sbuf_ == 0; 1044 } 1045public: 1046 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} 1047 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1048 : __sbuf_(__s.rdbuf()) {} 1049 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1050 : __sbuf_(__s) {} 1051 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1052 : __sbuf_(__p.__sbuf_) {} 1053 1054 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1055 {return static_cast<char_type>(__sbuf_->sgetc());} 1056 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1057 { 1058 __sbuf_->sbumpc(); 1059 return *this; 1060 } 1061 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1062 { 1063 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1064 } 1065 1066 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1067 {return __test_for_eof() == __b.__test_for_eof();} 1068}; 1069 1070template <class _CharT, class _Traits> 1071inline _LIBCPP_INLINE_VISIBILITY 1072bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1073 const istreambuf_iterator<_CharT,_Traits>& __b) 1074 {return __a.equal(__b);} 1075 1076template <class _CharT, class _Traits> 1077inline _LIBCPP_INLINE_VISIBILITY 1078bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1079 const istreambuf_iterator<_CharT,_Traits>& __b) 1080 {return !__a.equal(__b);} 1081 1082template <class _CharT, class _Traits> 1083class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1084 : public iterator<output_iterator_tag, void, void, void, void> 1085{ 1086public: 1087 typedef _CharT char_type; 1088 typedef _Traits traits_type; 1089 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1090 typedef basic_ostream<_CharT,_Traits> ostream_type; 1091private: 1092 streambuf_type* __sbuf_; 1093public: 1094 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1095 : __sbuf_(__s.rdbuf()) {} 1096 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1097 : __sbuf_(__s) {} 1098 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1099 { 1100 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1101 __sbuf_ = 0; 1102 return *this; 1103 } 1104 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1105 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1106 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1107 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;} 1108 1109 template <class _Ch, class _Tr> 1110 friend 1111 _LIBCPP_HIDDEN 1112 ostreambuf_iterator<_Ch, _Tr> 1113 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1114 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1115 ios_base& __iob, _Ch __fl); 1116}; 1117 1118template <class _Iter> 1119class _LIBCPP_TEMPLATE_VIS move_iterator 1120{ 1121private: 1122 _Iter __i; 1123public: 1124 typedef _Iter iterator_type; 1125 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1126 typedef typename iterator_traits<iterator_type>::value_type value_type; 1127 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1128 typedef iterator_type pointer; 1129#ifndef _LIBCPP_CXX03_LANG 1130 typedef typename iterator_traits<iterator_type>::reference __reference; 1131 typedef typename conditional< 1132 is_reference<__reference>::value, 1133 typename remove_reference<__reference>::type&&, 1134 __reference 1135 >::type reference; 1136#else 1137 typedef typename iterator_traits<iterator_type>::reference reference; 1138#endif 1139 1140 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1141 move_iterator() : __i() {} 1142 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1143 explicit move_iterator(_Iter __x) : __i(__x) {} 1144 template <class _Up> 1145 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1146 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1147 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1148 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1149 reference operator*() const { return static_cast<reference>(*__i); } 1150 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1151 pointer operator->() const { return __i;} 1152 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1153 move_iterator& operator++() {++__i; return *this;} 1154 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1155 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1156 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1157 move_iterator& operator--() {--__i; return *this;} 1158 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1159 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1160 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1161 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1162 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1163 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1164 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1165 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1166 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1167 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1168 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1169 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1170}; 1171 1172template <class _Iter1, class _Iter2> 1173inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1174bool 1175operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1176{ 1177 return __x.base() == __y.base(); 1178} 1179 1180template <class _Iter1, class _Iter2> 1181inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1182bool 1183operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1184{ 1185 return __x.base() < __y.base(); 1186} 1187 1188template <class _Iter1, class _Iter2> 1189inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1190bool 1191operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1192{ 1193 return __x.base() != __y.base(); 1194} 1195 1196template <class _Iter1, class _Iter2> 1197inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1198bool 1199operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1200{ 1201 return __x.base() > __y.base(); 1202} 1203 1204template <class _Iter1, class _Iter2> 1205inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1206bool 1207operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1208{ 1209 return __x.base() >= __y.base(); 1210} 1211 1212template <class _Iter1, class _Iter2> 1213inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1214bool 1215operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1216{ 1217 return __x.base() <= __y.base(); 1218} 1219 1220#ifndef _LIBCPP_CXX03_LANG 1221template <class _Iter1, class _Iter2> 1222inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1223auto 1224operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1225-> decltype(__x.base() - __y.base()) 1226{ 1227 return __x.base() - __y.base(); 1228} 1229#else 1230template <class _Iter1, class _Iter2> 1231inline _LIBCPP_INLINE_VISIBILITY 1232typename move_iterator<_Iter1>::difference_type 1233operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1234{ 1235 return __x.base() - __y.base(); 1236} 1237#endif 1238 1239template <class _Iter> 1240inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1241move_iterator<_Iter> 1242operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1243{ 1244 return move_iterator<_Iter>(__x.base() + __n); 1245} 1246 1247template <class _Iter> 1248inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1249move_iterator<_Iter> 1250make_move_iterator(_Iter __i) 1251{ 1252 return move_iterator<_Iter>(__i); 1253} 1254 1255// __wrap_iter 1256 1257template <class _Iter> class __wrap_iter; 1258 1259template <class _Iter1, class _Iter2> 1260_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1261bool 1262operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1263 1264template <class _Iter1, class _Iter2> 1265_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1266bool 1267operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1268 1269template <class _Iter1, class _Iter2> 1270_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1271bool 1272operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1273 1274template <class _Iter1, class _Iter2> 1275_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1276bool 1277operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1278 1279template <class _Iter1, class _Iter2> 1280_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1281bool 1282operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1283 1284template <class _Iter1, class _Iter2> 1285_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1286bool 1287operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1288 1289#ifndef _LIBCPP_CXX03_LANG 1290template <class _Iter1, class _Iter2> 1291_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1292auto 1293operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1294-> decltype(__x.base() - __y.base()); 1295#else 1296template <class _Iter1, class _Iter2> 1297_LIBCPP_INLINE_VISIBILITY 1298typename __wrap_iter<_Iter1>::difference_type 1299operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1300#endif 1301 1302template <class _Iter> 1303_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1304__wrap_iter<_Iter> 1305operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1306 1307template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY copy(_Ip, _Ip, _Op); 1308template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY copy_backward(_B1, _B1, _B2); 1309template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op); 1310template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2); 1311 1312#if _LIBCPP_DEBUG_LEVEL < 2 1313 1314template <class _Tp> 1315_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1316typename enable_if 1317< 1318 is_trivially_copy_assignable<_Tp>::value, 1319 _Tp* 1320>::type 1321__unwrap_iter(__wrap_iter<_Tp*>); 1322 1323#else 1324 1325template <class _Tp> 1326inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1327typename enable_if 1328< 1329 is_trivially_copy_assignable<_Tp>::value, 1330 __wrap_iter<_Tp*> 1331>::type 1332__unwrap_iter(__wrap_iter<_Tp*> __i); 1333 1334#endif 1335 1336template <class _Iter> 1337class __wrap_iter 1338{ 1339public: 1340 typedef _Iter iterator_type; 1341 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1342 typedef typename iterator_traits<iterator_type>::value_type value_type; 1343 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1344 typedef typename iterator_traits<iterator_type>::pointer pointer; 1345 typedef typename iterator_traits<iterator_type>::reference reference; 1346private: 1347 iterator_type __i; 1348public: 1349 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1350#if _LIBCPP_STD_VER > 11 1351 : __i{} 1352#endif 1353 { 1354#if _LIBCPP_DEBUG_LEVEL >= 2 1355 __get_db()->__insert_i(this); 1356#endif 1357 } 1358 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1359 __wrap_iter(const __wrap_iter<_Up>& __u, 1360 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT 1361 : __i(__u.base()) 1362 { 1363#if _LIBCPP_DEBUG_LEVEL >= 2 1364 __get_db()->__iterator_copy(this, &__u); 1365#endif 1366 } 1367#if _LIBCPP_DEBUG_LEVEL >= 2 1368 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1369 __wrap_iter(const __wrap_iter& __x) 1370 : __i(__x.base()) 1371 { 1372 __get_db()->__iterator_copy(this, &__x); 1373 } 1374 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1375 __wrap_iter& operator=(const __wrap_iter& __x) 1376 { 1377 if (this != &__x) 1378 { 1379 __get_db()->__iterator_copy(this, &__x); 1380 __i = __x.__i; 1381 } 1382 return *this; 1383 } 1384 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1385 ~__wrap_iter() 1386 { 1387 __get_db()->__erase_i(this); 1388 } 1389#endif 1390 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1391 { 1392#if _LIBCPP_DEBUG_LEVEL >= 2 1393 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1394 "Attempted to dereference a non-dereferenceable iterator"); 1395#endif 1396 return *__i; 1397 } 1398 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1399 { 1400#if _LIBCPP_DEBUG_LEVEL >= 2 1401 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1402 "Attempted to dereference a non-dereferenceable iterator"); 1403#endif 1404 return (pointer)_VSTD::addressof(*__i); 1405 } 1406 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1407 { 1408#if _LIBCPP_DEBUG_LEVEL >= 2 1409 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1410 "Attempted to increment non-incrementable iterator"); 1411#endif 1412 ++__i; 1413 return *this; 1414 } 1415 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1416 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1417 1418 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1419 { 1420#if _LIBCPP_DEBUG_LEVEL >= 2 1421 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1422 "Attempted to decrement non-decrementable iterator"); 1423#endif 1424 --__i; 1425 return *this; 1426 } 1427 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1428 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1429 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1430 {__wrap_iter __w(*this); __w += __n; return __w;} 1431 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1432 { 1433#if _LIBCPP_DEBUG_LEVEL >= 2 1434 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1435 "Attempted to add/subtract iterator outside of valid range"); 1436#endif 1437 __i += __n; 1438 return *this; 1439 } 1440 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1441 {return *this + (-__n);} 1442 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1443 {*this += -__n; return *this;} 1444 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1445 { 1446#if _LIBCPP_DEBUG_LEVEL >= 2 1447 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1448 "Attempted to subscript iterator outside of valid range"); 1449#endif 1450 return __i[__n]; 1451 } 1452 1453 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1454 1455private: 1456#if _LIBCPP_DEBUG_LEVEL >= 2 1457 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1458 { 1459 __get_db()->__insert_ic(this, __p); 1460 } 1461#else 1462 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1463#endif 1464 1465 template <class _Up> friend class __wrap_iter; 1466 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1467 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1468 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1469 1470 template <class _Iter1, class _Iter2> 1471 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1472 bool 1473 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1474 1475 template <class _Iter1, class _Iter2> 1476 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1477 bool 1478 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1479 1480 template <class _Iter1, class _Iter2> 1481 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1482 bool 1483 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1484 1485 template <class _Iter1, class _Iter2> 1486 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1487 bool 1488 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1489 1490 template <class _Iter1, class _Iter2> 1491 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1492 bool 1493 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1494 1495 template <class _Iter1, class _Iter2> 1496 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1497 bool 1498 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1499 1500#ifndef _LIBCPP_CXX03_LANG 1501 template <class _Iter1, class _Iter2> 1502 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1503 auto 1504 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1505 -> decltype(__x.base() - __y.base()); 1506#else 1507 template <class _Iter1, class _Iter2> 1508 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1509 typename __wrap_iter<_Iter1>::difference_type 1510 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1511#endif 1512 1513 template <class _Iter1> 1514 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1515 __wrap_iter<_Iter1> 1516 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1517 1518 template <class _Ip, class _Op> friend _Op copy(_Ip, _Ip, _Op); 1519 template <class _B1, class _B2> friend _B2 copy_backward(_B1, _B1, _B2); 1520 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op); 1521 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2); 1522 1523#if _LIBCPP_DEBUG_LEVEL < 2 1524 template <class _Tp> 1525 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1526 typename enable_if 1527 < 1528 is_trivially_copy_assignable<_Tp>::value, 1529 _Tp* 1530 >::type 1531 __unwrap_iter(__wrap_iter<_Tp*>); 1532#else 1533 template <class _Tp> 1534 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1535 typename enable_if 1536 < 1537 is_trivially_copy_assignable<_Tp>::value, 1538 __wrap_iter<_Tp*> 1539 >::type 1540 __unwrap_iter(__wrap_iter<_Tp*> __i); 1541#endif 1542}; 1543 1544template <class _Iter1, class _Iter2> 1545inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1546bool 1547operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1548{ 1549 return __x.base() == __y.base(); 1550} 1551 1552template <class _Iter1, class _Iter2> 1553inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1554bool 1555operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1556{ 1557#if _LIBCPP_DEBUG_LEVEL >= 2 1558 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1559 "Attempted to compare incomparable iterators"); 1560#endif 1561 return __x.base() < __y.base(); 1562} 1563 1564template <class _Iter1, class _Iter2> 1565inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1566bool 1567operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1568{ 1569 return !(__x == __y); 1570} 1571 1572template <class _Iter1, class _Iter2> 1573inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1574bool 1575operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1576{ 1577 return __y < __x; 1578} 1579 1580template <class _Iter1, class _Iter2> 1581inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1582bool 1583operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1584{ 1585 return !(__x < __y); 1586} 1587 1588template <class _Iter1, class _Iter2> 1589inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1590bool 1591operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1592{ 1593 return !(__y < __x); 1594} 1595 1596template <class _Iter1> 1597inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1598bool 1599operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1600{ 1601 return !(__x == __y); 1602} 1603 1604template <class _Iter1> 1605inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1606bool 1607operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1608{ 1609 return __y < __x; 1610} 1611 1612template <class _Iter1> 1613inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1614bool 1615operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1616{ 1617 return !(__x < __y); 1618} 1619 1620template <class _Iter1> 1621inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1622bool 1623operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1624{ 1625 return !(__y < __x); 1626} 1627 1628#ifndef _LIBCPP_CXX03_LANG 1629template <class _Iter1, class _Iter2> 1630inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1631auto 1632operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1633-> decltype(__x.base() - __y.base()) 1634{ 1635#if _LIBCPP_DEBUG_LEVEL >= 2 1636 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1637 "Attempted to subtract incompatible iterators"); 1638#endif 1639 return __x.base() - __y.base(); 1640} 1641#else 1642template <class _Iter1, class _Iter2> 1643inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1644typename __wrap_iter<_Iter1>::difference_type 1645operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1646{ 1647#if _LIBCPP_DEBUG_LEVEL >= 2 1648 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1649 "Attempted to subtract incompatible iterators"); 1650#endif 1651 return __x.base() - __y.base(); 1652} 1653#endif 1654 1655template <class _Iter> 1656inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1657__wrap_iter<_Iter> 1658operator+(typename __wrap_iter<_Iter>::difference_type __n, 1659 __wrap_iter<_Iter> __x) _NOEXCEPT 1660{ 1661 __x += __n; 1662 return __x; 1663} 1664 1665template <class _Iter> 1666struct __libcpp_is_trivial_iterator 1667 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1668 1669template <class _Iter> 1670struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1671 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1672 1673template <class _Iter> 1674struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1675 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1676 1677template <class _Iter> 1678struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1679 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1680 1681 1682template <class _Tp, size_t _Np> 1683_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1684_Tp* 1685begin(_Tp (&__array)[_Np]) 1686{ 1687 return __array; 1688} 1689 1690template <class _Tp, size_t _Np> 1691_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1692_Tp* 1693end(_Tp (&__array)[_Np]) 1694{ 1695 return __array + _Np; 1696} 1697 1698#if !defined(_LIBCPP_CXX03_LANG) 1699 1700template <class _Cp> 1701_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1702auto 1703begin(_Cp& __c) -> decltype(__c.begin()) 1704{ 1705 return __c.begin(); 1706} 1707 1708template <class _Cp> 1709_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1710auto 1711begin(const _Cp& __c) -> decltype(__c.begin()) 1712{ 1713 return __c.begin(); 1714} 1715 1716template <class _Cp> 1717_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1718auto 1719end(_Cp& __c) -> decltype(__c.end()) 1720{ 1721 return __c.end(); 1722} 1723 1724template <class _Cp> 1725_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1726auto 1727end(const _Cp& __c) -> decltype(__c.end()) 1728{ 1729 return __c.end(); 1730} 1731 1732#if _LIBCPP_STD_VER > 11 1733 1734template <class _Tp, size_t _Np> 1735_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1736reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1737{ 1738 return reverse_iterator<_Tp*>(__array + _Np); 1739} 1740 1741template <class _Tp, size_t _Np> 1742_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1743reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1744{ 1745 return reverse_iterator<_Tp*>(__array); 1746} 1747 1748template <class _Ep> 1749_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1750reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1751{ 1752 return reverse_iterator<const _Ep*>(__il.end()); 1753} 1754 1755template <class _Ep> 1756_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1757reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1758{ 1759 return reverse_iterator<const _Ep*>(__il.begin()); 1760} 1761 1762template <class _Cp> 1763_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1764auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1765{ 1766 return _VSTD::begin(__c); 1767} 1768 1769template <class _Cp> 1770_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1771auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1772{ 1773 return _VSTD::end(__c); 1774} 1775 1776template <class _Cp> 1777_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1778auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1779{ 1780 return __c.rbegin(); 1781} 1782 1783template <class _Cp> 1784_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1785auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1786{ 1787 return __c.rbegin(); 1788} 1789 1790template <class _Cp> 1791_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1792auto rend(_Cp& __c) -> decltype(__c.rend()) 1793{ 1794 return __c.rend(); 1795} 1796 1797template <class _Cp> 1798_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1799auto rend(const _Cp& __c) -> decltype(__c.rend()) 1800{ 1801 return __c.rend(); 1802} 1803 1804template <class _Cp> 1805_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1806auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1807{ 1808 return _VSTD::rbegin(__c); 1809} 1810 1811template <class _Cp> 1812_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1813auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1814{ 1815 return _VSTD::rend(__c); 1816} 1817 1818#endif 1819 1820 1821#else // defined(_LIBCPP_CXX03_LANG) 1822 1823template <class _Cp> 1824_LIBCPP_INLINE_VISIBILITY 1825typename _Cp::iterator 1826begin(_Cp& __c) 1827{ 1828 return __c.begin(); 1829} 1830 1831template <class _Cp> 1832_LIBCPP_INLINE_VISIBILITY 1833typename _Cp::const_iterator 1834begin(const _Cp& __c) 1835{ 1836 return __c.begin(); 1837} 1838 1839template <class _Cp> 1840_LIBCPP_INLINE_VISIBILITY 1841typename _Cp::iterator 1842end(_Cp& __c) 1843{ 1844 return __c.end(); 1845} 1846 1847template <class _Cp> 1848_LIBCPP_INLINE_VISIBILITY 1849typename _Cp::const_iterator 1850end(const _Cp& __c) 1851{ 1852 return __c.end(); 1853} 1854 1855#endif // !defined(_LIBCPP_CXX03_LANG) 1856 1857#if _LIBCPP_STD_VER > 14 1858 1859// #if _LIBCPP_STD_VER > 11 1860// template <> 1861// struct _LIBCPP_TEMPLATE_VIS plus<void> 1862// { 1863// template <class _T1, class _T2> 1864// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1865// auto operator()(_T1&& __t, _T2&& __u) const 1866// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1867// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1868// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1869// typedef void is_transparent; 1870// }; 1871// #endif 1872 1873template <class _Cont> 1874_LIBCPP_INLINE_VISIBILITY 1875constexpr auto size(const _Cont& __c) 1876_NOEXCEPT_(noexcept(__c.size())) 1877-> decltype (__c.size()) 1878{ return __c.size(); } 1879 1880template <class _Tp, size_t _Sz> 1881_LIBCPP_INLINE_VISIBILITY 1882constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1883 1884#if _LIBCPP_STD_VER > 17 1885template <class _Cont> 1886_LIBCPP_INLINE_VISIBILITY 1887constexpr auto ssize(const _Cont& __c) 1888_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1889-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1890{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1891 1892template <class _Tp, ptrdiff_t _Sz> 1893_LIBCPP_INLINE_VISIBILITY 1894constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1895#endif 1896 1897template <class _Cont> 1898_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1899constexpr auto empty(const _Cont& __c) 1900_NOEXCEPT_(noexcept(__c.empty())) 1901-> decltype (__c.empty()) 1902{ return __c.empty(); } 1903 1904template <class _Tp, size_t _Sz> 1905_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1906constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1907 1908template <class _Ep> 1909_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1910constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1911 1912template <class _Cont> constexpr 1913_LIBCPP_INLINE_VISIBILITY 1914auto data(_Cont& __c) 1915_NOEXCEPT_(noexcept(__c.data())) 1916-> decltype (__c.data()) 1917{ return __c.data(); } 1918 1919template <class _Cont> constexpr 1920_LIBCPP_INLINE_VISIBILITY 1921auto data(const _Cont& __c) 1922_NOEXCEPT_(noexcept(__c.data())) 1923-> decltype (__c.data()) 1924{ return __c.data(); } 1925 1926template <class _Tp, size_t _Sz> 1927_LIBCPP_INLINE_VISIBILITY 1928constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1929 1930template <class _Ep> 1931_LIBCPP_INLINE_VISIBILITY 1932constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1933#endif 1934 1935 1936_LIBCPP_END_NAMESPACE_STD 1937 1938#endif // _LIBCPP_ITERATOR 1939