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