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