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 402template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 403template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 404template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 405template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 406template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 407template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 408template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 409 410} // std 411 412*/ 413 414#include <__config> 415#include <iosfwd> // for forward declarations of vector and string. 416#include <__functional_base> 417#include <type_traits> 418#include <cstddef> 419#include <initializer_list> 420#include <version> 421#ifdef __APPLE__ 422#include <Availability.h> 423#endif 424 425#include <__debug> 426 427#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 428#pragma GCC system_header 429#endif 430 431_LIBCPP_BEGIN_NAMESPACE_STD 432 433struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {}; 434struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {}; 435struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag : public input_iterator_tag {}; 436struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {}; 437struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {}; 438 439template <class _Tp> 440struct __has_iterator_typedefs 441{ 442private: 443 struct __two {char __lx; char __lxx;}; 444 template <class _Up> static __two __test(...); 445 template <class _Up> static char __test(typename std::__void_t<typename _Up::iterator_category>::type* = 0, 446 typename std::__void_t<typename _Up::difference_type>::type* = 0, 447 typename std::__void_t<typename _Up::value_type>::type* = 0, 448 typename std::__void_t<typename _Up::reference>::type* = 0, 449 typename std::__void_t<typename _Up::pointer>::type* = 0 450 ); 451public: 452 static const bool value = sizeof(__test<_Tp>(0,0,0,0,0)) == 1; 453}; 454 455 456template <class _Tp> 457struct __has_iterator_category 458{ 459private: 460 struct __two {char __lx; char __lxx;}; 461 template <class _Up> static __two __test(...); 462 template <class _Up> static char __test(typename _Up::iterator_category* = 0); 463public: 464 static const bool value = sizeof(__test<_Tp>(0)) == 1; 465}; 466 467template <class _Iter, bool> struct __iterator_traits_impl {}; 468 469template <class _Iter> 470struct __iterator_traits_impl<_Iter, true> 471{ 472 typedef typename _Iter::difference_type difference_type; 473 typedef typename _Iter::value_type value_type; 474 typedef typename _Iter::pointer pointer; 475 typedef typename _Iter::reference reference; 476 typedef typename _Iter::iterator_category iterator_category; 477}; 478 479template <class _Iter, bool> struct __iterator_traits {}; 480 481template <class _Iter> 482struct __iterator_traits<_Iter, true> 483 : __iterator_traits_impl 484 < 485 _Iter, 486 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value || 487 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value 488 > 489{}; 490 491// iterator_traits<Iterator> will only have the nested types if Iterator::iterator_category 492// exists. Else iterator_traits<Iterator> will be an empty class. This is a 493// conforming extension which allows some programs to compile and behave as 494// the client expects instead of failing at compile time. 495 496template <class _Iter> 497struct _LIBCPP_TEMPLATE_VIS iterator_traits 498 : __iterator_traits<_Iter, __has_iterator_typedefs<_Iter>::value> {}; 499 500template<class _Tp> 501struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*> 502{ 503 typedef ptrdiff_t difference_type; 504 typedef typename remove_cv<_Tp>::type value_type; 505 typedef _Tp* pointer; 506 typedef _Tp& reference; 507 typedef random_access_iterator_tag iterator_category; 508}; 509 510template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value> 511struct __has_iterator_category_convertible_to 512 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value> 513{}; 514 515template <class _Tp, class _Up> 516struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {}; 517 518template <class _Tp> 519struct __is_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {}; 520 521template <class _Tp> 522struct __is_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {}; 523 524template <class _Tp> 525struct __is_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {}; 526 527template <class _Tp> 528struct __is_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {}; 529 530template <class _Tp> 531struct __is_exactly_input_iterator 532 : public integral_constant<bool, 533 __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && 534 !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; 535 536template<class _Category, class _Tp, class _Distance = ptrdiff_t, 537 class _Pointer = _Tp*, class _Reference = _Tp&> 538struct _LIBCPP_TEMPLATE_VIS iterator 539{ 540 typedef _Tp value_type; 541 typedef _Distance difference_type; 542 typedef _Pointer pointer; 543 typedef _Reference reference; 544 typedef _Category iterator_category; 545}; 546 547template <class _InputIter> 548inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 549void __advance(_InputIter& __i, 550 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 551{ 552 for (; __n > 0; --__n) 553 ++__i; 554} 555 556template <class _BiDirIter> 557inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 558void __advance(_BiDirIter& __i, 559 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 560{ 561 if (__n >= 0) 562 for (; __n > 0; --__n) 563 ++__i; 564 else 565 for (; __n < 0; ++__n) 566 --__i; 567} 568 569template <class _RandIter> 570inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 571void __advance(_RandIter& __i, 572 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 573{ 574 __i += __n; 575} 576 577template <class _InputIter> 578inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 579void advance(_InputIter& __i, 580 typename iterator_traits<_InputIter>::difference_type __n) 581{ 582 __advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 583} 584 585template <class _InputIter> 586inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 587typename iterator_traits<_InputIter>::difference_type 588__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 589{ 590 typename iterator_traits<_InputIter>::difference_type __r(0); 591 for (; __first != __last; ++__first) 592 ++__r; 593 return __r; 594} 595 596template <class _RandIter> 597inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 598typename iterator_traits<_RandIter>::difference_type 599__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 600{ 601 return __last - __first; 602} 603 604template <class _InputIter> 605inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 606typename iterator_traits<_InputIter>::difference_type 607distance(_InputIter __first, _InputIter __last) 608{ 609 return __distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 610} 611 612template <class _InputIter> 613inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 614typename enable_if 615< 616 __is_input_iterator<_InputIter>::value, 617 _InputIter 618>::type 619next(_InputIter __x, 620 typename iterator_traits<_InputIter>::difference_type __n = 1) 621{ 622 _VSTD::advance(__x, __n); 623 return __x; 624} 625 626template <class _BidirectionalIter> 627inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 628typename enable_if 629< 630 __is_bidirectional_iterator<_BidirectionalIter>::value, 631 _BidirectionalIter 632>::type 633prev(_BidirectionalIter __x, 634 typename iterator_traits<_BidirectionalIter>::difference_type __n = 1) 635{ 636 _VSTD::advance(__x, -__n); 637 return __x; 638} 639 640 641template <class _Tp, class = void> 642struct __is_stashing_iterator : false_type {}; 643 644template <class _Tp> 645struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 646 : true_type {}; 647 648template <class _Iter> 649class _LIBCPP_TEMPLATE_VIS reverse_iterator 650 : public iterator<typename iterator_traits<_Iter>::iterator_category, 651 typename iterator_traits<_Iter>::value_type, 652 typename iterator_traits<_Iter>::difference_type, 653 typename iterator_traits<_Iter>::pointer, 654 typename iterator_traits<_Iter>::reference> 655{ 656private: 657 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 658 659 static_assert(!__is_stashing_iterator<_Iter>::value, 660 "The specified iterator type cannot be used with reverse_iterator; " 661 "Using stashing iterators with reverse_iterator causes undefined behavior"); 662 663protected: 664 _Iter current; 665public: 666 typedef _Iter iterator_type; 667 typedef typename iterator_traits<_Iter>::difference_type difference_type; 668 typedef typename iterator_traits<_Iter>::reference reference; 669 typedef typename iterator_traits<_Iter>::pointer pointer; 670 671 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 672 reverse_iterator() : __t(), current() {} 673 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 674 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 675 template <class _Up> 676 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 677 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 678 template <class _Up> 679 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 680 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 681 { __t = current = __u.base(); return *this; } 682 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 683 _Iter base() const {return current;} 684 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 685 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 686 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 687 pointer operator->() const {return _VSTD::addressof(operator*());} 688 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 689 reverse_iterator& operator++() {--current; return *this;} 690 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 691 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 692 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 693 reverse_iterator& operator--() {++current; return *this;} 694 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 695 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 696 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 697 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 698 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 699 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 700 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 701 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 702 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 703 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 704 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 705 reference operator[](difference_type __n) const {return *(*this + __n);} 706}; 707 708template <class _Iter1, class _Iter2> 709inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 710bool 711operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 712{ 713 return __x.base() == __y.base(); 714} 715 716template <class _Iter1, class _Iter2> 717inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 718bool 719operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 720{ 721 return __x.base() > __y.base(); 722} 723 724template <class _Iter1, class _Iter2> 725inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 726bool 727operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 728{ 729 return __x.base() != __y.base(); 730} 731 732template <class _Iter1, class _Iter2> 733inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 734bool 735operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 736{ 737 return __x.base() < __y.base(); 738} 739 740template <class _Iter1, class _Iter2> 741inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 742bool 743operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 744{ 745 return __x.base() <= __y.base(); 746} 747 748template <class _Iter1, class _Iter2> 749inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 750bool 751operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 752{ 753 return __x.base() >= __y.base(); 754} 755 756#ifndef _LIBCPP_CXX03_LANG 757template <class _Iter1, class _Iter2> 758inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 759auto 760operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 761-> decltype(__y.base() - __x.base()) 762{ 763 return __y.base() - __x.base(); 764} 765#else 766template <class _Iter1, class _Iter2> 767inline _LIBCPP_INLINE_VISIBILITY 768typename reverse_iterator<_Iter1>::difference_type 769operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 770{ 771 return __y.base() - __x.base(); 772} 773#endif 774 775template <class _Iter> 776inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 777reverse_iterator<_Iter> 778operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 779{ 780 return reverse_iterator<_Iter>(__x.base() - __n); 781} 782 783#if _LIBCPP_STD_VER > 11 784template <class _Iter> 785inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 786reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 787{ 788 return reverse_iterator<_Iter>(__i); 789} 790#endif 791 792template <class _Container> 793class _LIBCPP_TEMPLATE_VIS back_insert_iterator 794 : public iterator<output_iterator_tag, 795 void, 796 void, 797 void, 798 void> 799{ 800protected: 801 _Container* container; 802public: 803 typedef _Container container_type; 804 805 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 806 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 807 {container->push_back(__value_); return *this;} 808#ifndef _LIBCPP_CXX03_LANG 809 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 810 {container->push_back(_VSTD::move(__value_)); return *this;} 811#endif // _LIBCPP_CXX03_LANG 812 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 813 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 814 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 815}; 816 817template <class _Container> 818inline _LIBCPP_INLINE_VISIBILITY 819back_insert_iterator<_Container> 820back_inserter(_Container& __x) 821{ 822 return back_insert_iterator<_Container>(__x); 823} 824 825template <class _Container> 826class _LIBCPP_TEMPLATE_VIS front_insert_iterator 827 : public iterator<output_iterator_tag, 828 void, 829 void, 830 void, 831 void> 832{ 833protected: 834 _Container* container; 835public: 836 typedef _Container container_type; 837 838 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 839 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 840 {container->push_front(__value_); return *this;} 841#ifndef _LIBCPP_CXX03_LANG 842 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 843 {container->push_front(_VSTD::move(__value_)); return *this;} 844#endif // _LIBCPP_CXX03_LANG 845 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 846 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 847 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 848}; 849 850template <class _Container> 851inline _LIBCPP_INLINE_VISIBILITY 852front_insert_iterator<_Container> 853front_inserter(_Container& __x) 854{ 855 return front_insert_iterator<_Container>(__x); 856} 857 858template <class _Container> 859class _LIBCPP_TEMPLATE_VIS insert_iterator 860 : public iterator<output_iterator_tag, 861 void, 862 void, 863 void, 864 void> 865{ 866protected: 867 _Container* container; 868 typename _Container::iterator iter; 869public: 870 typedef _Container container_type; 871 872 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 873 : container(_VSTD::addressof(__x)), iter(__i) {} 874 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 875 {iter = container->insert(iter, __value_); ++iter; return *this;} 876#ifndef _LIBCPP_CXX03_LANG 877 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 878 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 879#endif // _LIBCPP_CXX03_LANG 880 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 881 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 882 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 883}; 884 885template <class _Container> 886inline _LIBCPP_INLINE_VISIBILITY 887insert_iterator<_Container> 888inserter(_Container& __x, typename _Container::iterator __i) 889{ 890 return insert_iterator<_Container>(__x, __i); 891} 892 893template <class _Tp, class _CharT = char, 894 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 895class _LIBCPP_TEMPLATE_VIS istream_iterator 896 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 897{ 898public: 899 typedef _CharT char_type; 900 typedef _Traits traits_type; 901 typedef basic_istream<_CharT,_Traits> istream_type; 902private: 903 istream_type* __in_stream_; 904 _Tp __value_; 905public: 906 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(0), __value_() {} 907 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 908 { 909 if (!(*__in_stream_ >> __value_)) 910 __in_stream_ = 0; 911 } 912 913 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 914 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 915 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 916 { 917 if (!(*__in_stream_ >> __value_)) 918 __in_stream_ = 0; 919 return *this; 920 } 921 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 922 {istream_iterator __t(*this); ++(*this); return __t;} 923 924 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 925 friend _LIBCPP_INLINE_VISIBILITY 926 bool 927 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 928 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 929 930 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 931 friend _LIBCPP_INLINE_VISIBILITY 932 bool 933 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 934 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 935}; 936 937template <class _Tp, class _CharT, class _Traits, class _Distance> 938inline _LIBCPP_INLINE_VISIBILITY 939bool 940operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 941 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 942{ 943 return __x.__in_stream_ == __y.__in_stream_; 944} 945 946template <class _Tp, class _CharT, class _Traits, class _Distance> 947inline _LIBCPP_INLINE_VISIBILITY 948bool 949operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 950 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 951{ 952 return !(__x == __y); 953} 954 955template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 956class _LIBCPP_TEMPLATE_VIS ostream_iterator 957 : public iterator<output_iterator_tag, void, void, void, void> 958{ 959public: 960 typedef _CharT char_type; 961 typedef _Traits traits_type; 962 typedef basic_ostream<_CharT,_Traits> ostream_type; 963private: 964 ostream_type* __out_stream_; 965 const char_type* __delim_; 966public: 967 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 968 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {} 969 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 970 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 971 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 972 { 973 *__out_stream_ << __value_; 974 if (__delim_) 975 *__out_stream_ << __delim_; 976 return *this; 977 } 978 979 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 980 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 981 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 982}; 983 984template<class _CharT, class _Traits> 985class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 986 : public iterator<input_iterator_tag, _CharT, 987 typename _Traits::off_type, _CharT*, 988 _CharT> 989{ 990public: 991 typedef _CharT char_type; 992 typedef _Traits traits_type; 993 typedef typename _Traits::int_type int_type; 994 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 995 typedef basic_istream<_CharT,_Traits> istream_type; 996private: 997 mutable streambuf_type* __sbuf_; 998 999 class __proxy 1000 { 1001 char_type __keep_; 1002 streambuf_type* __sbuf_; 1003 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1004 : __keep_(__c), __sbuf_(__s) {} 1005 friend class istreambuf_iterator; 1006 public: 1007 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1008 }; 1009 1010 _LIBCPP_INLINE_VISIBILITY 1011 bool __test_for_eof() const 1012 { 1013 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1014 __sbuf_ = 0; 1015 return __sbuf_ == 0; 1016 } 1017public: 1018 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} 1019 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1020 : __sbuf_(__s.rdbuf()) {} 1021 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1022 : __sbuf_(__s) {} 1023 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1024 : __sbuf_(__p.__sbuf_) {} 1025 1026 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1027 {return static_cast<char_type>(__sbuf_->sgetc());} 1028 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1029 { 1030 __sbuf_->sbumpc(); 1031 return *this; 1032 } 1033 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1034 { 1035 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1036 } 1037 1038 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1039 {return __test_for_eof() == __b.__test_for_eof();} 1040}; 1041 1042template <class _CharT, class _Traits> 1043inline _LIBCPP_INLINE_VISIBILITY 1044bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1045 const istreambuf_iterator<_CharT,_Traits>& __b) 1046 {return __a.equal(__b);} 1047 1048template <class _CharT, class _Traits> 1049inline _LIBCPP_INLINE_VISIBILITY 1050bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1051 const istreambuf_iterator<_CharT,_Traits>& __b) 1052 {return !__a.equal(__b);} 1053 1054template <class _CharT, class _Traits> 1055class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1056 : public iterator<output_iterator_tag, void, void, void, void> 1057{ 1058public: 1059 typedef _CharT char_type; 1060 typedef _Traits traits_type; 1061 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1062 typedef basic_ostream<_CharT,_Traits> ostream_type; 1063private: 1064 streambuf_type* __sbuf_; 1065public: 1066 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1067 : __sbuf_(__s.rdbuf()) {} 1068 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1069 : __sbuf_(__s) {} 1070 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1071 { 1072 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1073 __sbuf_ = 0; 1074 return *this; 1075 } 1076 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1077 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1078 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1079 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;} 1080 1081#if !defined(__APPLE__) || \ 1082 (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \ 1083 (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0) 1084 1085 template <class _Ch, class _Tr> 1086 friend 1087 _LIBCPP_HIDDEN 1088 ostreambuf_iterator<_Ch, _Tr> 1089 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1090 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1091 ios_base& __iob, _Ch __fl); 1092#endif 1093}; 1094 1095template <class _Iter> 1096class _LIBCPP_TEMPLATE_VIS move_iterator 1097{ 1098private: 1099 _Iter __i; 1100public: 1101 typedef _Iter iterator_type; 1102 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1103 typedef typename iterator_traits<iterator_type>::value_type value_type; 1104 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1105 typedef iterator_type pointer; 1106#ifndef _LIBCPP_CXX03_LANG 1107 typedef typename iterator_traits<iterator_type>::reference __reference; 1108 typedef typename conditional< 1109 is_reference<__reference>::value, 1110 typename remove_reference<__reference>::type&&, 1111 __reference 1112 >::type reference; 1113#else 1114 typedef typename iterator_traits<iterator_type>::reference reference; 1115#endif 1116 1117 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1118 move_iterator() : __i() {} 1119 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1120 explicit move_iterator(_Iter __x) : __i(__x) {} 1121 template <class _Up> 1122 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1123 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1124 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1125 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1126 reference operator*() const { return static_cast<reference>(*__i); } 1127 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1128 pointer operator->() const { return __i;} 1129 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1130 move_iterator& operator++() {++__i; return *this;} 1131 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1132 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1133 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1134 move_iterator& operator--() {--__i; return *this;} 1135 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1136 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1137 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1138 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1139 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1140 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1141 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1142 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1143 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1144 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1145 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1146 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1147}; 1148 1149template <class _Iter1, class _Iter2> 1150inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1151bool 1152operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1153{ 1154 return __x.base() == __y.base(); 1155} 1156 1157template <class _Iter1, class _Iter2> 1158inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1159bool 1160operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1161{ 1162 return __x.base() < __y.base(); 1163} 1164 1165template <class _Iter1, class _Iter2> 1166inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1167bool 1168operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1169{ 1170 return __x.base() != __y.base(); 1171} 1172 1173template <class _Iter1, class _Iter2> 1174inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1175bool 1176operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1177{ 1178 return __x.base() > __y.base(); 1179} 1180 1181template <class _Iter1, class _Iter2> 1182inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1183bool 1184operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1185{ 1186 return __x.base() >= __y.base(); 1187} 1188 1189template <class _Iter1, class _Iter2> 1190inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1191bool 1192operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1193{ 1194 return __x.base() <= __y.base(); 1195} 1196 1197#ifndef _LIBCPP_CXX03_LANG 1198template <class _Iter1, class _Iter2> 1199inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1200auto 1201operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1202-> decltype(__x.base() - __y.base()) 1203{ 1204 return __x.base() - __y.base(); 1205} 1206#else 1207template <class _Iter1, class _Iter2> 1208inline _LIBCPP_INLINE_VISIBILITY 1209typename move_iterator<_Iter1>::difference_type 1210operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1211{ 1212 return __x.base() - __y.base(); 1213} 1214#endif 1215 1216template <class _Iter> 1217inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1218move_iterator<_Iter> 1219operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1220{ 1221 return move_iterator<_Iter>(__x.base() + __n); 1222} 1223 1224template <class _Iter> 1225inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1226move_iterator<_Iter> 1227make_move_iterator(_Iter __i) 1228{ 1229 return move_iterator<_Iter>(__i); 1230} 1231 1232// __wrap_iter 1233 1234template <class _Iter> class __wrap_iter; 1235 1236template <class _Iter1, class _Iter2> 1237_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1238bool 1239operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1240 1241template <class _Iter1, class _Iter2> 1242_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1243bool 1244operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1245 1246template <class _Iter1, class _Iter2> 1247_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1248bool 1249operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1250 1251template <class _Iter1, class _Iter2> 1252_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1253bool 1254operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1255 1256template <class _Iter1, class _Iter2> 1257_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1258bool 1259operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1260 1261template <class _Iter1, class _Iter2> 1262_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1263bool 1264operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1265 1266#ifndef _LIBCPP_CXX03_LANG 1267template <class _Iter1, class _Iter2> 1268_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1269auto 1270operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1271-> decltype(__x.base() - __y.base()); 1272#else 1273template <class _Iter1, class _Iter2> 1274_LIBCPP_INLINE_VISIBILITY 1275typename __wrap_iter<_Iter1>::difference_type 1276operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1277#endif 1278 1279template <class _Iter> 1280_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1281__wrap_iter<_Iter> 1282operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT_DEBUG; 1283 1284template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY copy(_Ip, _Ip, _Op); 1285template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY copy_backward(_B1, _B1, _B2); 1286template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op); 1287template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2); 1288 1289#if _LIBCPP_DEBUG_LEVEL < 2 1290 1291template <class _Tp> 1292_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1293typename enable_if 1294< 1295 is_trivially_copy_assignable<_Tp>::value, 1296 _Tp* 1297>::type 1298__unwrap_iter(__wrap_iter<_Tp*>); 1299 1300#else 1301 1302template <class _Tp> 1303inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1304typename enable_if 1305< 1306 is_trivially_copy_assignable<_Tp>::value, 1307 __wrap_iter<_Tp*> 1308>::type 1309__unwrap_iter(__wrap_iter<_Tp*> __i); 1310 1311#endif 1312 1313template <class _Iter> 1314class __wrap_iter 1315{ 1316public: 1317 typedef _Iter iterator_type; 1318 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1319 typedef typename iterator_traits<iterator_type>::value_type value_type; 1320 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1321 typedef typename iterator_traits<iterator_type>::pointer pointer; 1322 typedef typename iterator_traits<iterator_type>::reference reference; 1323private: 1324 iterator_type __i; 1325public: 1326 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT_DEBUG 1327#if _LIBCPP_STD_VER > 11 1328 : __i{} 1329#endif 1330 { 1331#if _LIBCPP_DEBUG_LEVEL >= 2 1332 __get_db()->__insert_i(this); 1333#endif 1334 } 1335 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1336 __wrap_iter(const __wrap_iter<_Up>& __u, 1337 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT_DEBUG 1338 : __i(__u.base()) 1339 { 1340#if _LIBCPP_DEBUG_LEVEL >= 2 1341 __get_db()->__iterator_copy(this, &__u); 1342#endif 1343 } 1344#if _LIBCPP_DEBUG_LEVEL >= 2 1345 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1346 __wrap_iter(const __wrap_iter& __x) 1347 : __i(__x.base()) 1348 { 1349 __get_db()->__iterator_copy(this, &__x); 1350 } 1351 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1352 __wrap_iter& operator=(const __wrap_iter& __x) 1353 { 1354 if (this != &__x) 1355 { 1356 __get_db()->__iterator_copy(this, &__x); 1357 __i = __x.__i; 1358 } 1359 return *this; 1360 } 1361 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1362 ~__wrap_iter() 1363 { 1364 __get_db()->__erase_i(this); 1365 } 1366#endif 1367 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT_DEBUG 1368 { 1369#if _LIBCPP_DEBUG_LEVEL >= 2 1370 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1371 "Attempted to dereference a non-dereferenceable iterator"); 1372#endif 1373 return *__i; 1374 } 1375 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT_DEBUG 1376 { 1377#if _LIBCPP_DEBUG_LEVEL >= 2 1378 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1379 "Attempted to dereference a non-dereferenceable iterator"); 1380#endif 1381 return (pointer)_VSTD::addressof(*__i); 1382 } 1383 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT_DEBUG 1384 { 1385#if _LIBCPP_DEBUG_LEVEL >= 2 1386 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1387 "Attempted to increment non-incrementable iterator"); 1388#endif 1389 ++__i; 1390 return *this; 1391 } 1392 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT_DEBUG 1393 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1394 1395 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT_DEBUG 1396 { 1397#if _LIBCPP_DEBUG_LEVEL >= 2 1398 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1399 "Attempted to decrement non-decrementable iterator"); 1400#endif 1401 --__i; 1402 return *this; 1403 } 1404 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT_DEBUG 1405 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1406 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT_DEBUG 1407 {__wrap_iter __w(*this); __w += __n; return __w;} 1408 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT_DEBUG 1409 { 1410#if _LIBCPP_DEBUG_LEVEL >= 2 1411 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1412 "Attempted to add/subtract iterator outside of valid range"); 1413#endif 1414 __i += __n; 1415 return *this; 1416 } 1417 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT_DEBUG 1418 {return *this + (-__n);} 1419 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT_DEBUG 1420 {*this += -__n; return *this;} 1421 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT_DEBUG 1422 { 1423#if _LIBCPP_DEBUG_LEVEL >= 2 1424 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1425 "Attempted to subscript iterator outside of valid range"); 1426#endif 1427 return __i[__n]; 1428 } 1429 1430 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT_DEBUG {return __i;} 1431 1432private: 1433#if _LIBCPP_DEBUG_LEVEL >= 2 1434 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1435 { 1436 __get_db()->__insert_ic(this, __p); 1437 } 1438#else 1439 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT_DEBUG : __i(__x) {} 1440#endif 1441 1442 template <class _Up> friend class __wrap_iter; 1443 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1444 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1445 template <class _Tp, ptrdiff_t> friend class _LIBCPP_TEMPLATE_VIS span; 1446 1447 template <class _Iter1, class _Iter2> 1448 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1449 bool 1450 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1451 1452 template <class _Iter1, class _Iter2> 1453 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1454 bool 1455 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1456 1457 template <class _Iter1, class _Iter2> 1458 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1459 bool 1460 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1461 1462 template <class _Iter1, class _Iter2> 1463 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1464 bool 1465 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1466 1467 template <class _Iter1, class _Iter2> 1468 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1469 bool 1470 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1471 1472 template <class _Iter1, class _Iter2> 1473 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1474 bool 1475 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1476 1477#ifndef _LIBCPP_CXX03_LANG 1478 template <class _Iter1, class _Iter2> 1479 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1480 auto 1481 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1482 -> decltype(__x.base() - __y.base()); 1483#else 1484 template <class _Iter1, class _Iter2> 1485 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1486 typename __wrap_iter<_Iter1>::difference_type 1487 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1488#endif 1489 1490 template <class _Iter1> 1491 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1492 __wrap_iter<_Iter1> 1493 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT_DEBUG; 1494 1495 template <class _Ip, class _Op> friend _Op copy(_Ip, _Ip, _Op); 1496 template <class _B1, class _B2> friend _B2 copy_backward(_B1, _B1, _B2); 1497 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op); 1498 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2); 1499 1500#if _LIBCPP_DEBUG_LEVEL < 2 1501 template <class _Tp> 1502 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1503 typename enable_if 1504 < 1505 is_trivially_copy_assignable<_Tp>::value, 1506 _Tp* 1507 >::type 1508 __unwrap_iter(__wrap_iter<_Tp*>); 1509#else 1510 template <class _Tp> 1511 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1512 typename enable_if 1513 < 1514 is_trivially_copy_assignable<_Tp>::value, 1515 __wrap_iter<_Tp*> 1516 >::type 1517 __unwrap_iter(__wrap_iter<_Tp*> __i); 1518#endif 1519}; 1520 1521template <class _Iter1, class _Iter2> 1522inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1523bool 1524operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1525{ 1526 return __x.base() == __y.base(); 1527} 1528 1529template <class _Iter1, class _Iter2> 1530inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1531bool 1532operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1533{ 1534#if _LIBCPP_DEBUG_LEVEL >= 2 1535 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1536 "Attempted to compare incomparable iterators"); 1537#endif 1538 return __x.base() < __y.base(); 1539} 1540 1541template <class _Iter1, class _Iter2> 1542inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1543bool 1544operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1545{ 1546 return !(__x == __y); 1547} 1548 1549template <class _Iter1, class _Iter2> 1550inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1551bool 1552operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1553{ 1554 return __y < __x; 1555} 1556 1557template <class _Iter1, class _Iter2> 1558inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1559bool 1560operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1561{ 1562 return !(__x < __y); 1563} 1564 1565template <class _Iter1, class _Iter2> 1566inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1567bool 1568operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1569{ 1570 return !(__y < __x); 1571} 1572 1573template <class _Iter1> 1574inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1575bool 1576operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1577{ 1578 return !(__x == __y); 1579} 1580 1581template <class _Iter1> 1582inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1583bool 1584operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1585{ 1586 return __y < __x; 1587} 1588 1589template <class _Iter1> 1590inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1591bool 1592operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1593{ 1594 return !(__x < __y); 1595} 1596 1597template <class _Iter1> 1598inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1599bool 1600operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1601{ 1602 return !(__y < __x); 1603} 1604 1605#ifndef _LIBCPP_CXX03_LANG 1606template <class _Iter1, class _Iter2> 1607inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1608auto 1609operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1610-> decltype(__x.base() - __y.base()) 1611{ 1612#if _LIBCPP_DEBUG_LEVEL >= 2 1613 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1614 "Attempted to subtract incompatible iterators"); 1615#endif 1616 return __x.base() - __y.base(); 1617} 1618#else 1619template <class _Iter1, class _Iter2> 1620inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1621typename __wrap_iter<_Iter1>::difference_type 1622operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1623{ 1624#if _LIBCPP_DEBUG_LEVEL >= 2 1625 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1626 "Attempted to subtract incompatible iterators"); 1627#endif 1628 return __x.base() - __y.base(); 1629} 1630#endif 1631 1632template <class _Iter> 1633inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1634__wrap_iter<_Iter> 1635operator+(typename __wrap_iter<_Iter>::difference_type __n, 1636 __wrap_iter<_Iter> __x) _NOEXCEPT_DEBUG 1637{ 1638 __x += __n; 1639 return __x; 1640} 1641 1642template <class _Iter> 1643struct __libcpp_is_trivial_iterator 1644 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1645 1646template <class _Iter> 1647struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1648 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1649 1650template <class _Iter> 1651struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1652 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1653 1654template <class _Iter> 1655struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1656 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1657 1658 1659template <class _Tp, size_t _Np> 1660inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1661_Tp* 1662begin(_Tp (&__array)[_Np]) 1663{ 1664 return __array; 1665} 1666 1667template <class _Tp, size_t _Np> 1668inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1669_Tp* 1670end(_Tp (&__array)[_Np]) 1671{ 1672 return __array + _Np; 1673} 1674 1675#if !defined(_LIBCPP_CXX03_LANG) 1676 1677template <class _Cp> 1678inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1679auto 1680begin(_Cp& __c) -> decltype(__c.begin()) 1681{ 1682 return __c.begin(); 1683} 1684 1685template <class _Cp> 1686inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1687auto 1688begin(const _Cp& __c) -> decltype(__c.begin()) 1689{ 1690 return __c.begin(); 1691} 1692 1693template <class _Cp> 1694inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1695auto 1696end(_Cp& __c) -> decltype(__c.end()) 1697{ 1698 return __c.end(); 1699} 1700 1701template <class _Cp> 1702inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1703auto 1704end(const _Cp& __c) -> decltype(__c.end()) 1705{ 1706 return __c.end(); 1707} 1708 1709#if _LIBCPP_STD_VER > 11 1710 1711template <class _Tp, size_t _Np> 1712inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1713reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1714{ 1715 return reverse_iterator<_Tp*>(__array + _Np); 1716} 1717 1718template <class _Tp, size_t _Np> 1719inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1720reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1721{ 1722 return reverse_iterator<_Tp*>(__array); 1723} 1724 1725template <class _Ep> 1726inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1727reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1728{ 1729 return reverse_iterator<const _Ep*>(__il.end()); 1730} 1731 1732template <class _Ep> 1733inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1734reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1735{ 1736 return reverse_iterator<const _Ep*>(__il.begin()); 1737} 1738 1739template <class _Cp> 1740inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1741auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1742{ 1743 return _VSTD::begin(__c); 1744} 1745 1746template <class _Cp> 1747inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1748auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1749{ 1750 return _VSTD::end(__c); 1751} 1752 1753template <class _Cp> 1754inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1755auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1756{ 1757 return __c.rbegin(); 1758} 1759 1760template <class _Cp> 1761inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1762auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1763{ 1764 return __c.rbegin(); 1765} 1766 1767template <class _Cp> 1768inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1769auto rend(_Cp& __c) -> decltype(__c.rend()) 1770{ 1771 return __c.rend(); 1772} 1773 1774template <class _Cp> 1775inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1776auto rend(const _Cp& __c) -> decltype(__c.rend()) 1777{ 1778 return __c.rend(); 1779} 1780 1781template <class _Cp> 1782inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1783auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1784{ 1785 return _VSTD::rbegin(__c); 1786} 1787 1788template <class _Cp> 1789inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1790auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1791{ 1792 return _VSTD::rend(__c); 1793} 1794 1795#endif 1796 1797 1798#else // defined(_LIBCPP_CXX03_LANG) 1799 1800template <class _Cp> 1801inline _LIBCPP_INLINE_VISIBILITY 1802typename _Cp::iterator 1803begin(_Cp& __c) 1804{ 1805 return __c.begin(); 1806} 1807 1808template <class _Cp> 1809inline _LIBCPP_INLINE_VISIBILITY 1810typename _Cp::const_iterator 1811begin(const _Cp& __c) 1812{ 1813 return __c.begin(); 1814} 1815 1816template <class _Cp> 1817inline _LIBCPP_INLINE_VISIBILITY 1818typename _Cp::iterator 1819end(_Cp& __c) 1820{ 1821 return __c.end(); 1822} 1823 1824template <class _Cp> 1825inline _LIBCPP_INLINE_VISIBILITY 1826typename _Cp::const_iterator 1827end(const _Cp& __c) 1828{ 1829 return __c.end(); 1830} 1831 1832#endif // !defined(_LIBCPP_CXX03_LANG) 1833 1834#if _LIBCPP_STD_VER > 14 1835 1836// #if _LIBCPP_STD_VER > 11 1837// template <> 1838// struct _LIBCPP_TEMPLATE_VIS plus<void> 1839// { 1840// template <class _T1, class _T2> 1841// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1842// auto operator()(_T1&& __t, _T2&& __u) const 1843// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1844// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1845// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1846// typedef void is_transparent; 1847// }; 1848// #endif 1849 1850template <class _Cont> 1851inline _LIBCPP_INLINE_VISIBILITY 1852constexpr auto size(const _Cont& __c) 1853_NOEXCEPT_(noexcept(__c.size())) 1854-> decltype (__c.size()) 1855{ return __c.size(); } 1856 1857template <class _Tp, size_t _Sz> 1858inline _LIBCPP_INLINE_VISIBILITY 1859constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1860 1861template <class _Cont> 1862_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1863constexpr auto empty(const _Cont& __c) 1864_NOEXCEPT_(noexcept(__c.empty())) 1865-> decltype (__c.empty()) 1866{ return __c.empty(); } 1867 1868template <class _Tp, size_t _Sz> 1869_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1870constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1871 1872template <class _Ep> 1873_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1874constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1875 1876template <class _Cont> constexpr 1877inline _LIBCPP_INLINE_VISIBILITY 1878auto data(_Cont& __c) 1879_NOEXCEPT_(noexcept(__c.data())) 1880-> decltype (__c.data()) 1881{ return __c.data(); } 1882 1883template <class _Cont> constexpr 1884inline _LIBCPP_INLINE_VISIBILITY 1885auto data(const _Cont& __c) 1886_NOEXCEPT_(noexcept(__c.data())) 1887-> decltype (__c.data()) 1888{ return __c.data(); } 1889 1890template <class _Tp, size_t _Sz> 1891inline _LIBCPP_INLINE_VISIBILITY 1892constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1893 1894template <class _Ep> 1895inline _LIBCPP_INLINE_VISIBILITY 1896constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1897#endif 1898 1899 1900_LIBCPP_END_NAMESPACE_STD 1901 1902#endif // _LIBCPP_ITERATOR 1903