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 541template<class _Category, class _Tp, class _Distance = ptrdiff_t, 542 class _Pointer = _Tp*, class _Reference = _Tp&> 543struct _LIBCPP_TEMPLATE_VIS iterator 544{ 545 typedef _Tp value_type; 546 typedef _Distance difference_type; 547 typedef _Pointer pointer; 548 typedef _Reference reference; 549 typedef _Category iterator_category; 550}; 551 552template <class _InputIter> 553inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 554void __advance(_InputIter& __i, 555 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 556{ 557 for (; __n > 0; --__n) 558 ++__i; 559} 560 561template <class _BiDirIter> 562inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 563void __advance(_BiDirIter& __i, 564 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 565{ 566 if (__n >= 0) 567 for (; __n > 0; --__n) 568 ++__i; 569 else 570 for (; __n < 0; ++__n) 571 --__i; 572} 573 574template <class _RandIter> 575inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 576void __advance(_RandIter& __i, 577 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 578{ 579 __i += __n; 580} 581 582template <class _InputIter> 583inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 584void advance(_InputIter& __i, 585 typename iterator_traits<_InputIter>::difference_type __n) 586{ 587 __advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 588} 589 590template <class _InputIter> 591inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 592typename iterator_traits<_InputIter>::difference_type 593__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 594{ 595 typename iterator_traits<_InputIter>::difference_type __r(0); 596 for (; __first != __last; ++__first) 597 ++__r; 598 return __r; 599} 600 601template <class _RandIter> 602inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 603typename iterator_traits<_RandIter>::difference_type 604__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 605{ 606 return __last - __first; 607} 608 609template <class _InputIter> 610inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 611typename iterator_traits<_InputIter>::difference_type 612distance(_InputIter __first, _InputIter __last) 613{ 614 return __distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 615} 616 617template <class _InputIter> 618inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 619typename enable_if 620< 621 __is_input_iterator<_InputIter>::value, 622 _InputIter 623>::type 624next(_InputIter __x, 625 typename iterator_traits<_InputIter>::difference_type __n = 1) 626{ 627 _VSTD::advance(__x, __n); 628 return __x; 629} 630 631template <class _BidirectionalIter> 632inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 633typename enable_if 634< 635 __is_bidirectional_iterator<_BidirectionalIter>::value, 636 _BidirectionalIter 637>::type 638prev(_BidirectionalIter __x, 639 typename iterator_traits<_BidirectionalIter>::difference_type __n = 1) 640{ 641 _VSTD::advance(__x, -__n); 642 return __x; 643} 644 645 646template <class _Tp, class = void> 647struct __is_stashing_iterator : false_type {}; 648 649template <class _Tp> 650struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 651 : true_type {}; 652 653template <class _Iter> 654class _LIBCPP_TEMPLATE_VIS reverse_iterator 655 : public iterator<typename iterator_traits<_Iter>::iterator_category, 656 typename iterator_traits<_Iter>::value_type, 657 typename iterator_traits<_Iter>::difference_type, 658 typename iterator_traits<_Iter>::pointer, 659 typename iterator_traits<_Iter>::reference> 660{ 661private: 662 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 663 664 static_assert(!__is_stashing_iterator<_Iter>::value, 665 "The specified iterator type cannot be used with reverse_iterator; " 666 "Using stashing iterators with reverse_iterator causes undefined behavior"); 667 668protected: 669 _Iter current; 670public: 671 typedef _Iter iterator_type; 672 typedef typename iterator_traits<_Iter>::difference_type difference_type; 673 typedef typename iterator_traits<_Iter>::reference reference; 674 typedef typename iterator_traits<_Iter>::pointer pointer; 675 676 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 677 reverse_iterator() : __t(), current() {} 678 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 679 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 680 template <class _Up> 681 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 682 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 683 template <class _Up> 684 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 685 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 686 { __t = current = __u.base(); return *this; } 687 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 688 _Iter base() const {return current;} 689 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 690 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 691 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 692 pointer operator->() const {return _VSTD::addressof(operator*());} 693 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 694 reverse_iterator& operator++() {--current; return *this;} 695 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 696 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 697 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 698 reverse_iterator& operator--() {++current; return *this;} 699 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 700 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 701 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 702 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 703 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 704 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 705 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 706 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 707 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 708 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 709 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 710 reference operator[](difference_type __n) const {return *(*this + __n);} 711}; 712 713template <class _Iter1, class _Iter2> 714inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 715bool 716operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 717{ 718 return __x.base() == __y.base(); 719} 720 721template <class _Iter1, class _Iter2> 722inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 723bool 724operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 725{ 726 return __x.base() > __y.base(); 727} 728 729template <class _Iter1, class _Iter2> 730inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 731bool 732operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 733{ 734 return __x.base() != __y.base(); 735} 736 737template <class _Iter1, class _Iter2> 738inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 739bool 740operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 741{ 742 return __x.base() < __y.base(); 743} 744 745template <class _Iter1, class _Iter2> 746inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 747bool 748operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 749{ 750 return __x.base() <= __y.base(); 751} 752 753template <class _Iter1, class _Iter2> 754inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 755bool 756operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 757{ 758 return __x.base() >= __y.base(); 759} 760 761#ifndef _LIBCPP_CXX03_LANG 762template <class _Iter1, class _Iter2> 763inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 764auto 765operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 766-> decltype(__y.base() - __x.base()) 767{ 768 return __y.base() - __x.base(); 769} 770#else 771template <class _Iter1, class _Iter2> 772inline _LIBCPP_INLINE_VISIBILITY 773typename reverse_iterator<_Iter1>::difference_type 774operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 775{ 776 return __y.base() - __x.base(); 777} 778#endif 779 780template <class _Iter> 781inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 782reverse_iterator<_Iter> 783operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 784{ 785 return reverse_iterator<_Iter>(__x.base() - __n); 786} 787 788#if _LIBCPP_STD_VER > 11 789template <class _Iter> 790inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 791reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 792{ 793 return reverse_iterator<_Iter>(__i); 794} 795#endif 796 797template <class _Container> 798class _LIBCPP_TEMPLATE_VIS back_insert_iterator 799 : public iterator<output_iterator_tag, 800 void, 801 void, 802 void, 803 void> 804{ 805protected: 806 _Container* container; 807public: 808 typedef _Container container_type; 809 810 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 811 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 812 {container->push_back(__value_); return *this;} 813#ifndef _LIBCPP_CXX03_LANG 814 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 815 {container->push_back(_VSTD::move(__value_)); return *this;} 816#endif // _LIBCPP_CXX03_LANG 817 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 818 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 819 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 820}; 821 822template <class _Container> 823inline _LIBCPP_INLINE_VISIBILITY 824back_insert_iterator<_Container> 825back_inserter(_Container& __x) 826{ 827 return back_insert_iterator<_Container>(__x); 828} 829 830template <class _Container> 831class _LIBCPP_TEMPLATE_VIS front_insert_iterator 832 : public iterator<output_iterator_tag, 833 void, 834 void, 835 void, 836 void> 837{ 838protected: 839 _Container* container; 840public: 841 typedef _Container container_type; 842 843 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 844 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 845 {container->push_front(__value_); return *this;} 846#ifndef _LIBCPP_CXX03_LANG 847 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 848 {container->push_front(_VSTD::move(__value_)); return *this;} 849#endif // _LIBCPP_CXX03_LANG 850 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 851 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 852 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 853}; 854 855template <class _Container> 856inline _LIBCPP_INLINE_VISIBILITY 857front_insert_iterator<_Container> 858front_inserter(_Container& __x) 859{ 860 return front_insert_iterator<_Container>(__x); 861} 862 863template <class _Container> 864class _LIBCPP_TEMPLATE_VIS insert_iterator 865 : public iterator<output_iterator_tag, 866 void, 867 void, 868 void, 869 void> 870{ 871protected: 872 _Container* container; 873 typename _Container::iterator iter; 874public: 875 typedef _Container container_type; 876 877 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 878 : container(_VSTD::addressof(__x)), iter(__i) {} 879 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 880 {iter = container->insert(iter, __value_); ++iter; return *this;} 881#ifndef _LIBCPP_CXX03_LANG 882 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 883 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 884#endif // _LIBCPP_CXX03_LANG 885 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 886 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 887 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 888}; 889 890template <class _Container> 891inline _LIBCPP_INLINE_VISIBILITY 892insert_iterator<_Container> 893inserter(_Container& __x, typename _Container::iterator __i) 894{ 895 return insert_iterator<_Container>(__x, __i); 896} 897 898template <class _Tp, class _CharT = char, 899 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 900class _LIBCPP_TEMPLATE_VIS istream_iterator 901 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 902{ 903public: 904 typedef _CharT char_type; 905 typedef _Traits traits_type; 906 typedef basic_istream<_CharT,_Traits> istream_type; 907private: 908 istream_type* __in_stream_; 909 _Tp __value_; 910public: 911 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(0), __value_() {} 912 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 913 { 914 if (!(*__in_stream_ >> __value_)) 915 __in_stream_ = 0; 916 } 917 918 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 919 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 920 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 921 { 922 if (!(*__in_stream_ >> __value_)) 923 __in_stream_ = 0; 924 return *this; 925 } 926 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 927 {istream_iterator __t(*this); ++(*this); return __t;} 928 929 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 930 friend _LIBCPP_INLINE_VISIBILITY 931 bool 932 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 933 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 934 935 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 936 friend _LIBCPP_INLINE_VISIBILITY 937 bool 938 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 939 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 940}; 941 942template <class _Tp, class _CharT, class _Traits, class _Distance> 943inline _LIBCPP_INLINE_VISIBILITY 944bool 945operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 946 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 947{ 948 return __x.__in_stream_ == __y.__in_stream_; 949} 950 951template <class _Tp, class _CharT, class _Traits, class _Distance> 952inline _LIBCPP_INLINE_VISIBILITY 953bool 954operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 955 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 956{ 957 return !(__x == __y); 958} 959 960template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 961class _LIBCPP_TEMPLATE_VIS ostream_iterator 962 : public iterator<output_iterator_tag, void, void, void, void> 963{ 964public: 965 typedef _CharT char_type; 966 typedef _Traits traits_type; 967 typedef basic_ostream<_CharT,_Traits> ostream_type; 968private: 969 ostream_type* __out_stream_; 970 const char_type* __delim_; 971public: 972 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 973 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {} 974 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 975 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 976 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 977 { 978 *__out_stream_ << __value_; 979 if (__delim_) 980 *__out_stream_ << __delim_; 981 return *this; 982 } 983 984 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 985 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 986 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 987}; 988 989template<class _CharT, class _Traits> 990class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 991 : public iterator<input_iterator_tag, _CharT, 992 typename _Traits::off_type, _CharT*, 993 _CharT> 994{ 995public: 996 typedef _CharT char_type; 997 typedef _Traits traits_type; 998 typedef typename _Traits::int_type int_type; 999 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1000 typedef basic_istream<_CharT,_Traits> istream_type; 1001private: 1002 mutable streambuf_type* __sbuf_; 1003 1004 class __proxy 1005 { 1006 char_type __keep_; 1007 streambuf_type* __sbuf_; 1008 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1009 : __keep_(__c), __sbuf_(__s) {} 1010 friend class istreambuf_iterator; 1011 public: 1012 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1013 }; 1014 1015 _LIBCPP_INLINE_VISIBILITY 1016 bool __test_for_eof() const 1017 { 1018 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1019 __sbuf_ = 0; 1020 return __sbuf_ == 0; 1021 } 1022public: 1023 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} 1024 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1025 : __sbuf_(__s.rdbuf()) {} 1026 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1027 : __sbuf_(__s) {} 1028 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1029 : __sbuf_(__p.__sbuf_) {} 1030 1031 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1032 {return static_cast<char_type>(__sbuf_->sgetc());} 1033 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1034 { 1035 __sbuf_->sbumpc(); 1036 return *this; 1037 } 1038 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1039 { 1040 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1041 } 1042 1043 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1044 {return __test_for_eof() == __b.__test_for_eof();} 1045}; 1046 1047template <class _CharT, class _Traits> 1048inline _LIBCPP_INLINE_VISIBILITY 1049bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1050 const istreambuf_iterator<_CharT,_Traits>& __b) 1051 {return __a.equal(__b);} 1052 1053template <class _CharT, class _Traits> 1054inline _LIBCPP_INLINE_VISIBILITY 1055bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1056 const istreambuf_iterator<_CharT,_Traits>& __b) 1057 {return !__a.equal(__b);} 1058 1059template <class _CharT, class _Traits> 1060class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1061 : public iterator<output_iterator_tag, void, void, void, void> 1062{ 1063public: 1064 typedef _CharT char_type; 1065 typedef _Traits traits_type; 1066 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1067 typedef basic_ostream<_CharT,_Traits> ostream_type; 1068private: 1069 streambuf_type* __sbuf_; 1070public: 1071 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1072 : __sbuf_(__s.rdbuf()) {} 1073 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1074 : __sbuf_(__s) {} 1075 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1076 { 1077 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1078 __sbuf_ = 0; 1079 return *this; 1080 } 1081 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1082 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1083 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1084 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;} 1085 1086#if !defined(__APPLE__) || \ 1087 (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \ 1088 (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0) 1089 1090 template <class _Ch, class _Tr> 1091 friend 1092 _LIBCPP_HIDDEN 1093 ostreambuf_iterator<_Ch, _Tr> 1094 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1095 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1096 ios_base& __iob, _Ch __fl); 1097#endif 1098}; 1099 1100template <class _Iter> 1101class _LIBCPP_TEMPLATE_VIS move_iterator 1102{ 1103private: 1104 _Iter __i; 1105public: 1106 typedef _Iter iterator_type; 1107 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1108 typedef typename iterator_traits<iterator_type>::value_type value_type; 1109 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1110 typedef iterator_type pointer; 1111#ifndef _LIBCPP_CXX03_LANG 1112 typedef typename iterator_traits<iterator_type>::reference __reference; 1113 typedef typename conditional< 1114 is_reference<__reference>::value, 1115 typename remove_reference<__reference>::type&&, 1116 __reference 1117 >::type reference; 1118#else 1119 typedef typename iterator_traits<iterator_type>::reference reference; 1120#endif 1121 1122 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1123 move_iterator() : __i() {} 1124 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1125 explicit move_iterator(_Iter __x) : __i(__x) {} 1126 template <class _Up> 1127 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1128 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1129 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1130 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1131 reference operator*() const { return static_cast<reference>(*__i); } 1132 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1133 pointer operator->() const { return __i;} 1134 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1135 move_iterator& operator++() {++__i; return *this;} 1136 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1137 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1138 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1139 move_iterator& operator--() {--__i; return *this;} 1140 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1141 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1142 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1143 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1144 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1145 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1146 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1147 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1148 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1149 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1150 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1151 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1152}; 1153 1154template <class _Iter1, class _Iter2> 1155inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1156bool 1157operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1158{ 1159 return __x.base() == __y.base(); 1160} 1161 1162template <class _Iter1, class _Iter2> 1163inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1164bool 1165operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1166{ 1167 return __x.base() < __y.base(); 1168} 1169 1170template <class _Iter1, class _Iter2> 1171inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1172bool 1173operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1174{ 1175 return __x.base() != __y.base(); 1176} 1177 1178template <class _Iter1, class _Iter2> 1179inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1180bool 1181operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1182{ 1183 return __x.base() > __y.base(); 1184} 1185 1186template <class _Iter1, class _Iter2> 1187inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1188bool 1189operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1190{ 1191 return __x.base() >= __y.base(); 1192} 1193 1194template <class _Iter1, class _Iter2> 1195inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1196bool 1197operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1198{ 1199 return __x.base() <= __y.base(); 1200} 1201 1202#ifndef _LIBCPP_CXX03_LANG 1203template <class _Iter1, class _Iter2> 1204inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1205auto 1206operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1207-> decltype(__x.base() - __y.base()) 1208{ 1209 return __x.base() - __y.base(); 1210} 1211#else 1212template <class _Iter1, class _Iter2> 1213inline _LIBCPP_INLINE_VISIBILITY 1214typename move_iterator<_Iter1>::difference_type 1215operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1216{ 1217 return __x.base() - __y.base(); 1218} 1219#endif 1220 1221template <class _Iter> 1222inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1223move_iterator<_Iter> 1224operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1225{ 1226 return move_iterator<_Iter>(__x.base() + __n); 1227} 1228 1229template <class _Iter> 1230inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1231move_iterator<_Iter> 1232make_move_iterator(_Iter __i) 1233{ 1234 return move_iterator<_Iter>(__i); 1235} 1236 1237// __wrap_iter 1238 1239template <class _Iter> class __wrap_iter; 1240 1241template <class _Iter1, class _Iter2> 1242_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1243bool 1244operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1245 1246template <class _Iter1, class _Iter2> 1247_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1248bool 1249operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1250 1251template <class _Iter1, class _Iter2> 1252_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1253bool 1254operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1255 1256template <class _Iter1, class _Iter2> 1257_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1258bool 1259operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1260 1261template <class _Iter1, class _Iter2> 1262_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1263bool 1264operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1265 1266template <class _Iter1, class _Iter2> 1267_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1268bool 1269operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1270 1271#ifndef _LIBCPP_CXX03_LANG 1272template <class _Iter1, class _Iter2> 1273_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1274auto 1275operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1276-> decltype(__x.base() - __y.base()); 1277#else 1278template <class _Iter1, class _Iter2> 1279_LIBCPP_INLINE_VISIBILITY 1280typename __wrap_iter<_Iter1>::difference_type 1281operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1282#endif 1283 1284template <class _Iter> 1285_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1286__wrap_iter<_Iter> 1287operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT; 1288 1289template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY copy(_Ip, _Ip, _Op); 1290template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY copy_backward(_B1, _B1, _B2); 1291template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op); 1292template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2); 1293 1294#if _LIBCPP_DEBUG_LEVEL < 2 1295 1296template <class _Tp> 1297_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1298typename enable_if 1299< 1300 is_trivially_copy_assignable<_Tp>::value, 1301 _Tp* 1302>::type 1303__unwrap_iter(__wrap_iter<_Tp*>); 1304 1305#else 1306 1307template <class _Tp> 1308inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1309typename enable_if 1310< 1311 is_trivially_copy_assignable<_Tp>::value, 1312 __wrap_iter<_Tp*> 1313>::type 1314__unwrap_iter(__wrap_iter<_Tp*> __i); 1315 1316#endif 1317 1318template <class _Iter> 1319class __wrap_iter 1320{ 1321public: 1322 typedef _Iter iterator_type; 1323 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1324 typedef typename iterator_traits<iterator_type>::value_type value_type; 1325 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1326 typedef typename iterator_traits<iterator_type>::pointer pointer; 1327 typedef typename iterator_traits<iterator_type>::reference reference; 1328private: 1329 iterator_type __i; 1330public: 1331 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT 1332#if _LIBCPP_STD_VER > 11 1333 : __i{} 1334#endif 1335 { 1336#if _LIBCPP_DEBUG_LEVEL >= 2 1337 __get_db()->__insert_i(this); 1338#endif 1339 } 1340 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1341 __wrap_iter(const __wrap_iter<_Up>& __u, 1342 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT 1343 : __i(__u.base()) 1344 { 1345#if _LIBCPP_DEBUG_LEVEL >= 2 1346 __get_db()->__iterator_copy(this, &__u); 1347#endif 1348 } 1349#if _LIBCPP_DEBUG_LEVEL >= 2 1350 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1351 __wrap_iter(const __wrap_iter& __x) 1352 : __i(__x.base()) 1353 { 1354 __get_db()->__iterator_copy(this, &__x); 1355 } 1356 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1357 __wrap_iter& operator=(const __wrap_iter& __x) 1358 { 1359 if (this != &__x) 1360 { 1361 __get_db()->__iterator_copy(this, &__x); 1362 __i = __x.__i; 1363 } 1364 return *this; 1365 } 1366 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1367 ~__wrap_iter() 1368 { 1369 __get_db()->__erase_i(this); 1370 } 1371#endif 1372 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT 1373 { 1374#if _LIBCPP_DEBUG_LEVEL >= 2 1375 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1376 "Attempted to dereference a non-dereferenceable iterator"); 1377#endif 1378 return *__i; 1379 } 1380 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT 1381 { 1382#if _LIBCPP_DEBUG_LEVEL >= 2 1383 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1384 "Attempted to dereference a non-dereferenceable iterator"); 1385#endif 1386 return (pointer)_VSTD::addressof(*__i); 1387 } 1388 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT 1389 { 1390#if _LIBCPP_DEBUG_LEVEL >= 2 1391 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1392 "Attempted to increment non-incrementable iterator"); 1393#endif 1394 ++__i; 1395 return *this; 1396 } 1397 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT 1398 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1399 1400 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT 1401 { 1402#if _LIBCPP_DEBUG_LEVEL >= 2 1403 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1404 "Attempted to decrement non-decrementable iterator"); 1405#endif 1406 --__i; 1407 return *this; 1408 } 1409 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT 1410 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1411 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT 1412 {__wrap_iter __w(*this); __w += __n; return __w;} 1413 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT 1414 { 1415#if _LIBCPP_DEBUG_LEVEL >= 2 1416 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1417 "Attempted to add/subtract iterator outside of valid range"); 1418#endif 1419 __i += __n; 1420 return *this; 1421 } 1422 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT 1423 {return *this + (-__n);} 1424 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT 1425 {*this += -__n; return *this;} 1426 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT 1427 { 1428#if _LIBCPP_DEBUG_LEVEL >= 2 1429 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1430 "Attempted to subscript iterator outside of valid range"); 1431#endif 1432 return __i[__n]; 1433 } 1434 1435 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT {return __i;} 1436 1437private: 1438#if _LIBCPP_DEBUG_LEVEL >= 2 1439 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1440 { 1441 __get_db()->__insert_ic(this, __p); 1442 } 1443#else 1444 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT : __i(__x) {} 1445#endif 1446 1447 template <class _Up> friend class __wrap_iter; 1448 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1449 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1450 template <class _Tp, size_t> friend class _LIBCPP_TEMPLATE_VIS span; 1451 1452 template <class _Iter1, class _Iter2> 1453 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1454 bool 1455 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1456 1457 template <class _Iter1, class _Iter2> 1458 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1459 bool 1460 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1461 1462 template <class _Iter1, class _Iter2> 1463 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1464 bool 1465 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1466 1467 template <class _Iter1, class _Iter2> 1468 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1469 bool 1470 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1471 1472 template <class _Iter1, class _Iter2> 1473 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1474 bool 1475 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1476 1477 template <class _Iter1, class _Iter2> 1478 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1479 bool 1480 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1481 1482#ifndef _LIBCPP_CXX03_LANG 1483 template <class _Iter1, class _Iter2> 1484 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1485 auto 1486 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1487 -> decltype(__x.base() - __y.base()); 1488#else 1489 template <class _Iter1, class _Iter2> 1490 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1491 typename __wrap_iter<_Iter1>::difference_type 1492 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT; 1493#endif 1494 1495 template <class _Iter1> 1496 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1497 __wrap_iter<_Iter1> 1498 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT; 1499 1500 template <class _Ip, class _Op> friend _Op copy(_Ip, _Ip, _Op); 1501 template <class _B1, class _B2> friend _B2 copy_backward(_B1, _B1, _B2); 1502 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op); 1503 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2); 1504 1505#if _LIBCPP_DEBUG_LEVEL < 2 1506 template <class _Tp> 1507 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1508 typename enable_if 1509 < 1510 is_trivially_copy_assignable<_Tp>::value, 1511 _Tp* 1512 >::type 1513 __unwrap_iter(__wrap_iter<_Tp*>); 1514#else 1515 template <class _Tp> 1516 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1517 typename enable_if 1518 < 1519 is_trivially_copy_assignable<_Tp>::value, 1520 __wrap_iter<_Tp*> 1521 >::type 1522 __unwrap_iter(__wrap_iter<_Tp*> __i); 1523#endif 1524}; 1525 1526template <class _Iter1, class _Iter2> 1527inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1528bool 1529operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1530{ 1531 return __x.base() == __y.base(); 1532} 1533 1534template <class _Iter1, class _Iter2> 1535inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1536bool 1537operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1538{ 1539#if _LIBCPP_DEBUG_LEVEL >= 2 1540 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1541 "Attempted to compare incomparable iterators"); 1542#endif 1543 return __x.base() < __y.base(); 1544} 1545 1546template <class _Iter1, class _Iter2> 1547inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1548bool 1549operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1550{ 1551 return !(__x == __y); 1552} 1553 1554template <class _Iter1, class _Iter2> 1555inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1556bool 1557operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1558{ 1559 return __y < __x; 1560} 1561 1562template <class _Iter1, class _Iter2> 1563inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1564bool 1565operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1566{ 1567 return !(__x < __y); 1568} 1569 1570template <class _Iter1, class _Iter2> 1571inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1572bool 1573operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1574{ 1575 return !(__y < __x); 1576} 1577 1578template <class _Iter1> 1579inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1580bool 1581operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1582{ 1583 return !(__x == __y); 1584} 1585 1586template <class _Iter1> 1587inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1588bool 1589operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1590{ 1591 return __y < __x; 1592} 1593 1594template <class _Iter1> 1595inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1596bool 1597operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1598{ 1599 return !(__x < __y); 1600} 1601 1602template <class _Iter1> 1603inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1604bool 1605operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT 1606{ 1607 return !(__y < __x); 1608} 1609 1610#ifndef _LIBCPP_CXX03_LANG 1611template <class _Iter1, class _Iter2> 1612inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1613auto 1614operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1615-> decltype(__x.base() - __y.base()) 1616{ 1617#if _LIBCPP_DEBUG_LEVEL >= 2 1618 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1619 "Attempted to subtract incompatible iterators"); 1620#endif 1621 return __x.base() - __y.base(); 1622} 1623#else 1624template <class _Iter1, class _Iter2> 1625inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1626typename __wrap_iter<_Iter1>::difference_type 1627operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT 1628{ 1629#if _LIBCPP_DEBUG_LEVEL >= 2 1630 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1631 "Attempted to subtract incompatible iterators"); 1632#endif 1633 return __x.base() - __y.base(); 1634} 1635#endif 1636 1637template <class _Iter> 1638inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1639__wrap_iter<_Iter> 1640operator+(typename __wrap_iter<_Iter>::difference_type __n, 1641 __wrap_iter<_Iter> __x) _NOEXCEPT 1642{ 1643 __x += __n; 1644 return __x; 1645} 1646 1647template <class _Iter> 1648struct __libcpp_is_trivial_iterator 1649 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1650 1651template <class _Iter> 1652struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1653 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1654 1655template <class _Iter> 1656struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1657 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1658 1659template <class _Iter> 1660struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1661 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1662 1663 1664template <class _Tp, size_t _Np> 1665_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1666_Tp* 1667begin(_Tp (&__array)[_Np]) 1668{ 1669 return __array; 1670} 1671 1672template <class _Tp, size_t _Np> 1673_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1674_Tp* 1675end(_Tp (&__array)[_Np]) 1676{ 1677 return __array + _Np; 1678} 1679 1680#if !defined(_LIBCPP_CXX03_LANG) 1681 1682template <class _Cp> 1683_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1684auto 1685begin(_Cp& __c) -> decltype(__c.begin()) 1686{ 1687 return __c.begin(); 1688} 1689 1690template <class _Cp> 1691_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1692auto 1693begin(const _Cp& __c) -> decltype(__c.begin()) 1694{ 1695 return __c.begin(); 1696} 1697 1698template <class _Cp> 1699_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1700auto 1701end(_Cp& __c) -> decltype(__c.end()) 1702{ 1703 return __c.end(); 1704} 1705 1706template <class _Cp> 1707_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1708auto 1709end(const _Cp& __c) -> decltype(__c.end()) 1710{ 1711 return __c.end(); 1712} 1713 1714#if _LIBCPP_STD_VER > 11 1715 1716template <class _Tp, size_t _Np> 1717_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1718reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1719{ 1720 return reverse_iterator<_Tp*>(__array + _Np); 1721} 1722 1723template <class _Tp, size_t _Np> 1724_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1725reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1726{ 1727 return reverse_iterator<_Tp*>(__array); 1728} 1729 1730template <class _Ep> 1731_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1732reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1733{ 1734 return reverse_iterator<const _Ep*>(__il.end()); 1735} 1736 1737template <class _Ep> 1738_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1739reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1740{ 1741 return reverse_iterator<const _Ep*>(__il.begin()); 1742} 1743 1744template <class _Cp> 1745_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1746auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1747{ 1748 return _VSTD::begin(__c); 1749} 1750 1751template <class _Cp> 1752_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1753auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1754{ 1755 return _VSTD::end(__c); 1756} 1757 1758template <class _Cp> 1759_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1760auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1761{ 1762 return __c.rbegin(); 1763} 1764 1765template <class _Cp> 1766_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1767auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1768{ 1769 return __c.rbegin(); 1770} 1771 1772template <class _Cp> 1773_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1774auto rend(_Cp& __c) -> decltype(__c.rend()) 1775{ 1776 return __c.rend(); 1777} 1778 1779template <class _Cp> 1780_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1781auto rend(const _Cp& __c) -> decltype(__c.rend()) 1782{ 1783 return __c.rend(); 1784} 1785 1786template <class _Cp> 1787_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1788auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1789{ 1790 return _VSTD::rbegin(__c); 1791} 1792 1793template <class _Cp> 1794_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1795auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1796{ 1797 return _VSTD::rend(__c); 1798} 1799 1800#endif 1801 1802 1803#else // defined(_LIBCPP_CXX03_LANG) 1804 1805template <class _Cp> 1806_LIBCPP_INLINE_VISIBILITY 1807typename _Cp::iterator 1808begin(_Cp& __c) 1809{ 1810 return __c.begin(); 1811} 1812 1813template <class _Cp> 1814_LIBCPP_INLINE_VISIBILITY 1815typename _Cp::const_iterator 1816begin(const _Cp& __c) 1817{ 1818 return __c.begin(); 1819} 1820 1821template <class _Cp> 1822_LIBCPP_INLINE_VISIBILITY 1823typename _Cp::iterator 1824end(_Cp& __c) 1825{ 1826 return __c.end(); 1827} 1828 1829template <class _Cp> 1830_LIBCPP_INLINE_VISIBILITY 1831typename _Cp::const_iterator 1832end(const _Cp& __c) 1833{ 1834 return __c.end(); 1835} 1836 1837#endif // !defined(_LIBCPP_CXX03_LANG) 1838 1839#if _LIBCPP_STD_VER > 14 1840 1841// #if _LIBCPP_STD_VER > 11 1842// template <> 1843// struct _LIBCPP_TEMPLATE_VIS plus<void> 1844// { 1845// template <class _T1, class _T2> 1846// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1847// auto operator()(_T1&& __t, _T2&& __u) const 1848// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1849// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1850// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1851// typedef void is_transparent; 1852// }; 1853// #endif 1854 1855template <class _Cont> 1856_LIBCPP_INLINE_VISIBILITY 1857constexpr auto size(const _Cont& __c) 1858_NOEXCEPT_(noexcept(__c.size())) 1859-> decltype (__c.size()) 1860{ return __c.size(); } 1861 1862template <class _Tp, size_t _Sz> 1863_LIBCPP_INLINE_VISIBILITY 1864constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1865 1866#if _LIBCPP_STD_VER > 17 1867template <class _Cont> 1868_LIBCPP_INLINE_VISIBILITY 1869constexpr auto ssize(const _Cont& __c) 1870_NOEXCEPT_(noexcept(static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()))) 1871-> common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>> 1872{ return static_cast<common_type_t<ptrdiff_t, make_signed_t<decltype(__c.size())>>>(__c.size()); } 1873 1874template <class _Tp, ptrdiff_t _Sz> 1875_LIBCPP_INLINE_VISIBILITY 1876constexpr ptrdiff_t ssize(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1877#endif 1878 1879template <class _Cont> 1880_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1881constexpr auto empty(const _Cont& __c) 1882_NOEXCEPT_(noexcept(__c.empty())) 1883-> decltype (__c.empty()) 1884{ return __c.empty(); } 1885 1886template <class _Tp, size_t _Sz> 1887_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1888constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1889 1890template <class _Ep> 1891_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_INLINE_VISIBILITY 1892constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1893 1894template <class _Cont> constexpr 1895_LIBCPP_INLINE_VISIBILITY 1896auto data(_Cont& __c) 1897_NOEXCEPT_(noexcept(__c.data())) 1898-> decltype (__c.data()) 1899{ return __c.data(); } 1900 1901template <class _Cont> constexpr 1902_LIBCPP_INLINE_VISIBILITY 1903auto data(const _Cont& __c) 1904_NOEXCEPT_(noexcept(__c.data())) 1905-> decltype (__c.data()) 1906{ return __c.data(); } 1907 1908template <class _Tp, size_t _Sz> 1909_LIBCPP_INLINE_VISIBILITY 1910constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1911 1912template <class _Ep> 1913_LIBCPP_INLINE_VISIBILITY 1914constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1915#endif 1916 1917 1918_LIBCPP_END_NAMESPACE_STD 1919 1920#endif // _LIBCPP_ITERATOR 1921