1// -*- C++ -*- 2//===-------------------------- iterator ----------------------------------===// 3// 4// The LLVM Compiler Infrastructure 5// 6// This file is dual licensed under the MIT and the University of Illinois Open 7// Source Licenses. See LICENSE.TXT for details. 8// 9//===----------------------------------------------------------------------===// 10 11#ifndef _LIBCPP_ITERATOR 12#define _LIBCPP_ITERATOR 13 14/* 15 iterator synopsis 16 17namespace std 18{ 19 20template<class Iterator> 21struct iterator_traits 22{ 23 typedef typename Iterator::difference_type difference_type; 24 typedef typename Iterator::value_type value_type; 25 typedef typename Iterator::pointer pointer; 26 typedef typename Iterator::reference reference; 27 typedef typename Iterator::iterator_category iterator_category; 28}; 29 30template<class T> 31struct iterator_traits<T*> 32{ 33 typedef ptrdiff_t difference_type; 34 typedef T value_type; 35 typedef T* pointer; 36 typedef T& reference; 37 typedef random_access_iterator_tag iterator_category; 38}; 39 40template<class Category, class T, class Distance = ptrdiff_t, 41 class Pointer = T*, class Reference = T&> 42struct iterator 43{ 44 typedef T value_type; 45 typedef Distance difference_type; 46 typedef Pointer pointer; 47 typedef Reference reference; 48 typedef Category iterator_category; 49}; 50 51struct input_iterator_tag {}; 52struct output_iterator_tag {}; 53struct forward_iterator_tag : public input_iterator_tag {}; 54struct bidirectional_iterator_tag : public forward_iterator_tag {}; 55struct random_access_iterator_tag : public bidirectional_iterator_tag {}; 56 57// 27.4.3, iterator operations 58// extension: second argument not conforming to C++03 59template <class InputIterator> // constexpr in C++17 60 constexpr void advance(InputIterator& i, 61 typename iterator_traits<InputIterator>::difference_type n); 62 63template <class InputIterator> // constexpr in C++17 64 constexpr typename iterator_traits<InputIterator>::difference_type 65 distance(InputIterator first, InputIterator last); 66 67template <class InputIterator> // constexpr in C++17 68 constexpr InputIterator next(InputIterator x, 69typename iterator_traits<InputIterator>::difference_type n = 1); 70 71template <class BidirectionalIterator> // constexpr in C++17 72 constexpr BidirectionalIterator prev(BidirectionalIterator x, 73 typename iterator_traits<BidirectionalIterator>::difference_type n = 1); 74 75template <class Iterator> 76class reverse_iterator 77 : public iterator<typename iterator_traits<Iterator>::iterator_category, 78 typename iterator_traits<Iterator>::value_type, 79 typename iterator_traits<Iterator>::difference_type, 80 typename iterator_traits<Iterator>::pointer, 81 typename iterator_traits<Iterator>::reference> 82{ 83protected: 84 Iterator current; 85public: 86 typedef Iterator iterator_type; 87 typedef typename iterator_traits<Iterator>::difference_type difference_type; 88 typedef typename iterator_traits<Iterator>::reference reference; 89 typedef typename iterator_traits<Iterator>::pointer pointer; 90 91 constexpr reverse_iterator(); 92 constexpr explicit reverse_iterator(Iterator x); 93 template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u); 94 template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u); 95 constexpr Iterator base() const; 96 constexpr reference operator*() const; 97 constexpr pointer operator->() const; 98 constexpr reverse_iterator& operator++(); 99 constexpr reverse_iterator operator++(int); 100 constexpr reverse_iterator& operator--(); 101 constexpr reverse_iterator operator--(int); 102 constexpr reverse_iterator operator+ (difference_type n) const; 103 constexpr reverse_iterator& operator+=(difference_type n); 104 constexpr reverse_iterator operator- (difference_type n) const; 105 constexpr reverse_iterator& operator-=(difference_type n); 106 constexpr reference operator[](difference_type n) const; 107}; 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 bool // constexpr in C++17 131operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y); 132 133template <class Iterator1, class Iterator2> 134constexpr auto 135operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y) 136-> decltype(__y.base() - __x.base()); // constexpr in C++17 137 138template <class Iterator> 139constexpr reverse_iterator<Iterator> 140operator+(typename reverse_iterator<Iterator>::difference_type n, 141 const reverse_iterator<Iterator>& x); // constexpr in C++17 142 143template <class Iterator> 144constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17 145 146template <class Container> 147class back_insert_iterator 148{ 149protected: 150 Container* container; 151public: 152 typedef Container container_type; 153 typedef void value_type; 154 typedef void difference_type; 155 typedef void reference; 156 typedef void pointer; 157 158 explicit back_insert_iterator(Container& x); 159 back_insert_iterator& operator=(const typename Container::value_type& value); 160 back_insert_iterator& operator*(); 161 back_insert_iterator& operator++(); 162 back_insert_iterator operator++(int); 163}; 164 165template <class Container> back_insert_iterator<Container> back_inserter(Container& x); 166 167template <class Container> 168class front_insert_iterator 169{ 170protected: 171 Container* container; 172public: 173 typedef Container container_type; 174 typedef void value_type; 175 typedef void difference_type; 176 typedef void reference; 177 typedef void pointer; 178 179 explicit front_insert_iterator(Container& x); 180 front_insert_iterator& operator=(const typename Container::value_type& value); 181 front_insert_iterator& operator*(); 182 front_insert_iterator& operator++(); 183 front_insert_iterator operator++(int); 184}; 185 186template <class Container> front_insert_iterator<Container> front_inserter(Container& x); 187 188template <class Container> 189class insert_iterator 190{ 191protected: 192 Container* container; 193 typename Container::iterator iter; 194public: 195 typedef Container container_type; 196 typedef void value_type; 197 typedef void difference_type; 198 typedef void reference; 199 typedef void pointer; 200 201 insert_iterator(Container& x, typename Container::iterator i); 202 insert_iterator& operator=(const typename Container::value_type& value); 203 insert_iterator& operator*(); 204 insert_iterator& operator++(); 205 insert_iterator& operator++(int); 206}; 207 208template <class Container, class Iterator> 209insert_iterator<Container> inserter(Container& x, Iterator i); 210 211template <class Iterator> 212class move_iterator { 213public: 214 typedef Iterator iterator_type; 215 typedef typename iterator_traits<Iterator>::difference_type difference_type; 216 typedef Iterator pointer; 217 typedef typename iterator_traits<Iterator>::value_type value_type; 218 typedef typename iterator_traits<Iterator>::iterator_category iterator_category; 219 typedef value_type&& reference; 220 221 constexpr move_iterator(); // all the constexprs are in C++17 222 constexpr explicit move_iterator(Iterator i); 223 template <class U> 224 constexpr move_iterator(const move_iterator<U>& u); 225 template <class U> 226 constexpr move_iterator& operator=(const move_iterator<U>& u); 227 constexpr iterator_type base() const; 228 constexpr reference operator*() const; 229 constexpr pointer operator->() const; 230 constexpr move_iterator& operator++(); 231 constexpr move_iterator operator++(int); 232 constexpr move_iterator& operator--(); 233 constexpr move_iterator operator--(int); 234 constexpr move_iterator operator+(difference_type n) const; 235 constexpr move_iterator& operator+=(difference_type n); 236 constexpr move_iterator operator-(difference_type n) const; 237 constexpr move_iterator& operator-=(difference_type n); 238 constexpr unspecified operator[](difference_type n) const; 239private: 240 Iterator current; // exposition only 241}; 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 bool // constexpr in C++17 265operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y); 266 267template <class Iterator1, class Iterator2> 268constexpr auto // constexpr in C++17 269operator-(const move_iterator<Iterator1>& x, 270 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base()); 271 272template <class Iterator> 273constexpr move_iterator<Iterator> operator+( // constexpr in C++17 274 typename move_iterator<Iterator>::difference_type n, 275 const move_iterator<Iterator>& x); 276 277template <class Iterator> // constexpr in C++17 278constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i); 279 280 281template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t> 282class istream_iterator 283 : public iterator<input_iterator_tag, T, Distance, const T*, const T&> 284{ 285public: 286 typedef charT char_type; 287 typedef traits traits_type; 288 typedef basic_istream<charT,traits> istream_type; 289 290 constexpr istream_iterator(); 291 istream_iterator(istream_type& s); 292 istream_iterator(const istream_iterator& x); 293 ~istream_iterator(); 294 295 const T& operator*() const; 296 const T* operator->() const; 297 istream_iterator& operator++(); 298 istream_iterator operator++(int); 299}; 300 301template <class T, class charT, class traits, class Distance> 302bool operator==(const istream_iterator<T,charT,traits,Distance>& x, 303 const istream_iterator<T,charT,traits,Distance>& y); 304template <class T, class charT, class traits, class Distance> 305bool operator!=(const istream_iterator<T,charT,traits,Distance>& x, 306 const istream_iterator<T,charT,traits,Distance>& y); 307 308template <class T, class charT = char, class traits = char_traits<charT> > 309class ostream_iterator 310 : public iterator<output_iterator_tag, void, void, void ,void> 311{ 312public: 313 typedef charT char_type; 314 typedef traits traits_type; 315 typedef basic_ostream<charT,traits> ostream_type; 316 317 ostream_iterator(ostream_type& s); 318 ostream_iterator(ostream_type& s, const charT* delimiter); 319 ostream_iterator(const ostream_iterator& x); 320 ~ostream_iterator(); 321 ostream_iterator& operator=(const T& value); 322 323 ostream_iterator& operator*(); 324 ostream_iterator& operator++(); 325 ostream_iterator& operator++(int); 326}; 327 328template<class charT, class traits = char_traits<charT> > 329class istreambuf_iterator 330 : public iterator<input_iterator_tag, charT, 331 typename traits::off_type, unspecified, 332 charT> 333{ 334public: 335 typedef charT char_type; 336 typedef traits traits_type; 337 typedef typename traits::int_type int_type; 338 typedef basic_streambuf<charT,traits> streambuf_type; 339 typedef basic_istream<charT,traits> istream_type; 340 341 istreambuf_iterator() noexcept; 342 istreambuf_iterator(istream_type& s) noexcept; 343 istreambuf_iterator(streambuf_type* s) noexcept; 344 istreambuf_iterator(a-private-type) noexcept; 345 346 charT operator*() const; 347 pointer operator->() const; 348 istreambuf_iterator& operator++(); 349 a-private-type operator++(int); 350 351 bool equal(const istreambuf_iterator& b) const; 352}; 353 354template <class charT, class traits> 355bool operator==(const istreambuf_iterator<charT,traits>& a, 356 const istreambuf_iterator<charT,traits>& b); 357template <class charT, class traits> 358bool operator!=(const istreambuf_iterator<charT,traits>& a, 359 const istreambuf_iterator<charT,traits>& b); 360 361template <class charT, class traits = char_traits<charT> > 362class ostreambuf_iterator 363 : public iterator<output_iterator_tag, void, void, void, void> 364{ 365public: 366 typedef charT char_type; 367 typedef traits traits_type; 368 typedef basic_streambuf<charT,traits> streambuf_type; 369 typedef basic_ostream<charT,traits> ostream_type; 370 371 ostreambuf_iterator(ostream_type& s) noexcept; 372 ostreambuf_iterator(streambuf_type* s) noexcept; 373 ostreambuf_iterator& operator=(charT c); 374 ostreambuf_iterator& operator*(); 375 ostreambuf_iterator& operator++(); 376 ostreambuf_iterator& operator++(int); 377 bool failed() const noexcept; 378}; 379 380template <class C> constexpr auto begin(C& c) -> decltype(c.begin()); 381template <class C> constexpr auto begin(const C& c) -> decltype(c.begin()); 382template <class C> constexpr auto end(C& c) -> decltype(c.end()); 383template <class C> constexpr auto end(const C& c) -> decltype(c.end()); 384template <class T, size_t N> constexpr T* begin(T (&array)[N]); 385template <class T, size_t N> constexpr T* end(T (&array)[N]); 386 387template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14 388template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14 389template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14 390template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14 391template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14 392template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14 393template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14 394template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14 395template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14 396template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14 397template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14 398template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14 399 400// 24.8, container access: 401template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17 402template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17 403template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17 404template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17 405template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17 406template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17 407template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17 408template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17 409template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17 410 411} // std 412 413*/ 414 415#include <__config> 416#include <iosfwd> // for forward declarations of vector and string. 417#include <__functional_base> 418#include <type_traits> 419#include <cstddef> 420#include <initializer_list> 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_category 441{ 442private: 443 struct __two {char __lx; char __lxx;}; 444 template <class _Up> static __two __test(...); 445 template <class _Up> static char __test(typename _Up::iterator_category* = 0); 446public: 447 static const bool value = sizeof(__test<_Tp>(0)) == 1; 448}; 449 450template <class _Iter, bool> struct __iterator_traits_impl {}; 451 452template <class _Iter> 453struct __iterator_traits_impl<_Iter, true> 454{ 455 typedef typename _Iter::difference_type difference_type; 456 typedef typename _Iter::value_type value_type; 457 typedef typename _Iter::pointer pointer; 458 typedef typename _Iter::reference reference; 459 typedef typename _Iter::iterator_category iterator_category; 460}; 461 462template <class _Iter, bool> struct __iterator_traits {}; 463 464template <class _Iter> 465struct __iterator_traits<_Iter, true> 466 : __iterator_traits_impl 467 < 468 _Iter, 469 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value || 470 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value 471 > 472{}; 473 474// iterator_traits<Iterator> will only have the nested types if Iterator::iterator_category 475// exists. Else iterator_traits<Iterator> will be an empty class. This is a 476// conforming extension which allows some programs to compile and behave as 477// the client expects instead of failing at compile time. 478 479template <class _Iter> 480struct _LIBCPP_TEMPLATE_VIS iterator_traits 481 : __iterator_traits<_Iter, __has_iterator_category<_Iter>::value> {}; 482 483template<class _Tp> 484struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*> 485{ 486 typedef ptrdiff_t difference_type; 487 typedef typename remove_cv<_Tp>::type value_type; 488 typedef _Tp* pointer; 489 typedef _Tp& reference; 490 typedef random_access_iterator_tag iterator_category; 491}; 492 493template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value> 494struct __has_iterator_category_convertible_to 495 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value> 496{}; 497 498template <class _Tp, class _Up> 499struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {}; 500 501template <class _Tp> 502struct __is_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {}; 503 504template <class _Tp> 505struct __is_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {}; 506 507template <class _Tp> 508struct __is_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {}; 509 510template <class _Tp> 511struct __is_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {}; 512 513template <class _Tp> 514struct __is_exactly_input_iterator 515 : public integral_constant<bool, 516 __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && 517 !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; 518 519template<class _Category, class _Tp, class _Distance = ptrdiff_t, 520 class _Pointer = _Tp*, class _Reference = _Tp&> 521struct _LIBCPP_TEMPLATE_VIS iterator 522{ 523 typedef _Tp value_type; 524 typedef _Distance difference_type; 525 typedef _Pointer pointer; 526 typedef _Reference reference; 527 typedef _Category iterator_category; 528}; 529 530template <class _InputIter> 531inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 532void __advance(_InputIter& __i, 533 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 534{ 535 for (; __n > 0; --__n) 536 ++__i; 537} 538 539template <class _BiDirIter> 540inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 541void __advance(_BiDirIter& __i, 542 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 543{ 544 if (__n >= 0) 545 for (; __n > 0; --__n) 546 ++__i; 547 else 548 for (; __n < 0; ++__n) 549 --__i; 550} 551 552template <class _RandIter> 553inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 554void __advance(_RandIter& __i, 555 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 556{ 557 __i += __n; 558} 559 560template <class _InputIter> 561inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 562void advance(_InputIter& __i, 563 typename iterator_traits<_InputIter>::difference_type __n) 564{ 565 __advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 566} 567 568template <class _InputIter> 569inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 570typename iterator_traits<_InputIter>::difference_type 571__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 572{ 573 typename iterator_traits<_InputIter>::difference_type __r(0); 574 for (; __first != __last; ++__first) 575 ++__r; 576 return __r; 577} 578 579template <class _RandIter> 580inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 581typename iterator_traits<_RandIter>::difference_type 582__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 583{ 584 return __last - __first; 585} 586 587template <class _InputIter> 588inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 589typename iterator_traits<_InputIter>::difference_type 590distance(_InputIter __first, _InputIter __last) 591{ 592 return __distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 593} 594 595template <class _InputIter> 596inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 597typename enable_if 598< 599 __is_input_iterator<_InputIter>::value, 600 _InputIter 601>::type 602next(_InputIter __x, 603 typename iterator_traits<_InputIter>::difference_type __n = 1) 604{ 605 _VSTD::advance(__x, __n); 606 return __x; 607} 608 609template <class _BidirectionalIter> 610inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 611typename enable_if 612< 613 __is_bidirectional_iterator<_BidirectionalIter>::value, 614 _BidirectionalIter 615>::type 616prev(_BidirectionalIter __x, 617 typename iterator_traits<_BidirectionalIter>::difference_type __n = 1) 618{ 619 _VSTD::advance(__x, -__n); 620 return __x; 621} 622 623 624template <class _Tp, class = void> 625struct __is_stashing_iterator : false_type {}; 626 627template <class _Tp> 628struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 629 : true_type {}; 630 631template <class _Iter> 632class _LIBCPP_TEMPLATE_VIS reverse_iterator 633 : public iterator<typename iterator_traits<_Iter>::iterator_category, 634 typename iterator_traits<_Iter>::value_type, 635 typename iterator_traits<_Iter>::difference_type, 636 typename iterator_traits<_Iter>::pointer, 637 typename iterator_traits<_Iter>::reference> 638{ 639private: 640 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 641 642 static_assert(!__is_stashing_iterator<_Iter>::value, 643 "The specified iterator type cannot be used with reverse_iterator; " 644 "Using stashing iterators with reverse_iterator causes undefined behavior"); 645 646protected: 647 _Iter current; 648public: 649 typedef _Iter iterator_type; 650 typedef typename iterator_traits<_Iter>::difference_type difference_type; 651 typedef typename iterator_traits<_Iter>::reference reference; 652 typedef typename iterator_traits<_Iter>::pointer pointer; 653 654 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 655 reverse_iterator() : __t(), current() {} 656 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 657 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 658 template <class _Up> 659 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 660 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 661 template <class _Up> 662 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 663 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 664 { __t = current = __u.base(); return *this; } 665 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 666 _Iter base() const {return current;} 667 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 668 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 669 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 670 pointer operator->() const {return _VSTD::addressof(operator*());} 671 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 672 reverse_iterator& operator++() {--current; return *this;} 673 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 674 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 675 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 676 reverse_iterator& operator--() {++current; return *this;} 677 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 678 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 679 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 680 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 681 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 682 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 683 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 684 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 685 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 686 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 687 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 688 reference operator[](difference_type __n) const {return *(*this + __n);} 689}; 690 691template <class _Iter1, class _Iter2> 692inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 693bool 694operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 695{ 696 return __x.base() == __y.base(); 697} 698 699template <class _Iter1, class _Iter2> 700inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 701bool 702operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 703{ 704 return __x.base() > __y.base(); 705} 706 707template <class _Iter1, class _Iter2> 708inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 709bool 710operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 711{ 712 return __x.base() != __y.base(); 713} 714 715template <class _Iter1, class _Iter2> 716inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 717bool 718operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 719{ 720 return __x.base() < __y.base(); 721} 722 723template <class _Iter1, class _Iter2> 724inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 725bool 726operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 727{ 728 return __x.base() <= __y.base(); 729} 730 731template <class _Iter1, class _Iter2> 732inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 733bool 734operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 735{ 736 return __x.base() >= __y.base(); 737} 738 739#ifndef _LIBCPP_CXX03_LANG 740template <class _Iter1, class _Iter2> 741inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 742auto 743operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 744-> decltype(__y.base() - __x.base()) 745{ 746 return __y.base() - __x.base(); 747} 748#else 749template <class _Iter1, class _Iter2> 750inline _LIBCPP_INLINE_VISIBILITY 751typename reverse_iterator<_Iter1>::difference_type 752operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 753{ 754 return __y.base() - __x.base(); 755} 756#endif 757 758template <class _Iter> 759inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 760reverse_iterator<_Iter> 761operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 762{ 763 return reverse_iterator<_Iter>(__x.base() - __n); 764} 765 766#if _LIBCPP_STD_VER > 11 767template <class _Iter> 768inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 769reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 770{ 771 return reverse_iterator<_Iter>(__i); 772} 773#endif 774 775template <class _Container> 776class _LIBCPP_TEMPLATE_VIS back_insert_iterator 777 : public iterator<output_iterator_tag, 778 void, 779 void, 780 void, 781 void> 782{ 783protected: 784 _Container* container; 785public: 786 typedef _Container container_type; 787 788 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 789 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 790 {container->push_back(__value_); return *this;} 791#ifndef _LIBCPP_CXX03_LANG 792 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 793 {container->push_back(_VSTD::move(__value_)); return *this;} 794#endif // _LIBCPP_CXX03_LANG 795 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 796 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 797 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 798}; 799 800template <class _Container> 801inline _LIBCPP_INLINE_VISIBILITY 802back_insert_iterator<_Container> 803back_inserter(_Container& __x) 804{ 805 return back_insert_iterator<_Container>(__x); 806} 807 808template <class _Container> 809class _LIBCPP_TEMPLATE_VIS front_insert_iterator 810 : public iterator<output_iterator_tag, 811 void, 812 void, 813 void, 814 void> 815{ 816protected: 817 _Container* container; 818public: 819 typedef _Container container_type; 820 821 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 822 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 823 {container->push_front(__value_); return *this;} 824#ifndef _LIBCPP_CXX03_LANG 825 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 826 {container->push_front(_VSTD::move(__value_)); return *this;} 827#endif // _LIBCPP_CXX03_LANG 828 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 829 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 830 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 831}; 832 833template <class _Container> 834inline _LIBCPP_INLINE_VISIBILITY 835front_insert_iterator<_Container> 836front_inserter(_Container& __x) 837{ 838 return front_insert_iterator<_Container>(__x); 839} 840 841template <class _Container> 842class _LIBCPP_TEMPLATE_VIS insert_iterator 843 : public iterator<output_iterator_tag, 844 void, 845 void, 846 void, 847 void> 848{ 849protected: 850 _Container* container; 851 typename _Container::iterator iter; 852public: 853 typedef _Container container_type; 854 855 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 856 : container(_VSTD::addressof(__x)), iter(__i) {} 857 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 858 {iter = container->insert(iter, __value_); ++iter; return *this;} 859#ifndef _LIBCPP_CXX03_LANG 860 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 861 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 862#endif // _LIBCPP_CXX03_LANG 863 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 864 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 865 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 866}; 867 868template <class _Container> 869inline _LIBCPP_INLINE_VISIBILITY 870insert_iterator<_Container> 871inserter(_Container& __x, typename _Container::iterator __i) 872{ 873 return insert_iterator<_Container>(__x, __i); 874} 875 876template <class _Tp, class _CharT = char, 877 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 878class _LIBCPP_TEMPLATE_VIS istream_iterator 879 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 880{ 881public: 882 typedef _CharT char_type; 883 typedef _Traits traits_type; 884 typedef basic_istream<_CharT,_Traits> istream_type; 885private: 886 istream_type* __in_stream_; 887 _Tp __value_; 888public: 889 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(0), __value_() {} 890 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 891 { 892 if (!(*__in_stream_ >> __value_)) 893 __in_stream_ = 0; 894 } 895 896 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 897 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 898 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 899 { 900 if (!(*__in_stream_ >> __value_)) 901 __in_stream_ = 0; 902 return *this; 903 } 904 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 905 {istream_iterator __t(*this); ++(*this); return __t;} 906 907 friend _LIBCPP_INLINE_VISIBILITY 908 bool operator==(const istream_iterator& __x, const istream_iterator& __y) 909 {return __x.__in_stream_ == __y.__in_stream_;} 910 911 friend _LIBCPP_INLINE_VISIBILITY 912 bool operator!=(const istream_iterator& __x, const istream_iterator& __y) 913 {return !(__x == __y);} 914}; 915 916template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 917class _LIBCPP_TEMPLATE_VIS ostream_iterator 918 : public iterator<output_iterator_tag, void, void, void, void> 919{ 920public: 921 typedef _CharT char_type; 922 typedef _Traits traits_type; 923 typedef basic_ostream<_CharT,_Traits> ostream_type; 924private: 925 ostream_type* __out_stream_; 926 const char_type* __delim_; 927public: 928 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 929 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {} 930 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 931 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 932 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 933 { 934 *__out_stream_ << __value_; 935 if (__delim_) 936 *__out_stream_ << __delim_; 937 return *this; 938 } 939 940 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 941 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 942 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 943}; 944 945template<class _CharT, class _Traits> 946class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 947 : public iterator<input_iterator_tag, _CharT, 948 typename _Traits::off_type, _CharT*, 949 _CharT> 950{ 951public: 952 typedef _CharT char_type; 953 typedef _Traits traits_type; 954 typedef typename _Traits::int_type int_type; 955 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 956 typedef basic_istream<_CharT,_Traits> istream_type; 957private: 958 mutable streambuf_type* __sbuf_; 959 960 class __proxy 961 { 962 char_type __keep_; 963 streambuf_type* __sbuf_; 964 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 965 : __keep_(__c), __sbuf_(__s) {} 966 friend class istreambuf_iterator; 967 public: 968 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 969 }; 970 971 _LIBCPP_INLINE_VISIBILITY 972 bool __test_for_eof() const 973 { 974 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 975 __sbuf_ = 0; 976 return __sbuf_ == 0; 977 } 978public: 979 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} 980 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 981 : __sbuf_(__s.rdbuf()) {} 982 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 983 : __sbuf_(__s) {} 984 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 985 : __sbuf_(__p.__sbuf_) {} 986 987 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 988 {return static_cast<char_type>(__sbuf_->sgetc());} 989 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 990 { 991 __sbuf_->sbumpc(); 992 return *this; 993 } 994 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 995 { 996 return __proxy(__sbuf_->sbumpc(), __sbuf_); 997 } 998 999 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1000 {return __test_for_eof() == __b.__test_for_eof();} 1001}; 1002 1003template <class _CharT, class _Traits> 1004inline _LIBCPP_INLINE_VISIBILITY 1005bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1006 const istreambuf_iterator<_CharT,_Traits>& __b) 1007 {return __a.equal(__b);} 1008 1009template <class _CharT, class _Traits> 1010inline _LIBCPP_INLINE_VISIBILITY 1011bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1012 const istreambuf_iterator<_CharT,_Traits>& __b) 1013 {return !__a.equal(__b);} 1014 1015template <class _CharT, class _Traits> 1016class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1017 : public iterator<output_iterator_tag, void, void, void, void> 1018{ 1019public: 1020 typedef _CharT char_type; 1021 typedef _Traits traits_type; 1022 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1023 typedef basic_ostream<_CharT,_Traits> ostream_type; 1024private: 1025 streambuf_type* __sbuf_; 1026public: 1027 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1028 : __sbuf_(__s.rdbuf()) {} 1029 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1030 : __sbuf_(__s) {} 1031 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1032 { 1033 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1034 __sbuf_ = 0; 1035 return *this; 1036 } 1037 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1038 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1039 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1040 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;} 1041 1042#if !defined(__APPLE__) || \ 1043 (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \ 1044 (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0) 1045 1046 template <class _Ch, class _Tr> 1047 friend 1048 _LIBCPP_HIDDEN 1049 ostreambuf_iterator<_Ch, _Tr> 1050 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1051 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1052 ios_base& __iob, _Ch __fl); 1053#endif 1054}; 1055 1056template <class _Iter> 1057class _LIBCPP_TEMPLATE_VIS move_iterator 1058{ 1059private: 1060 _Iter __i; 1061public: 1062 typedef _Iter iterator_type; 1063 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1064 typedef typename iterator_traits<iterator_type>::value_type value_type; 1065 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1066 typedef iterator_type pointer; 1067#ifndef _LIBCPP_CXX03_LANG 1068 typedef typename iterator_traits<iterator_type>::reference __reference; 1069 typedef typename conditional< 1070 is_reference<__reference>::value, 1071 typename remove_reference<__reference>::type&&, 1072 __reference 1073 >::type reference; 1074#else 1075 typedef typename iterator_traits<iterator_type>::reference reference; 1076#endif 1077 1078 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1079 move_iterator() : __i() {} 1080 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1081 explicit move_iterator(_Iter __x) : __i(__x) {} 1082 template <class _Up> 1083 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1084 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1085 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1086 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1087 reference operator*() const { return static_cast<reference>(*__i); } 1088 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1089 pointer operator->() const { return __i;} 1090 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1091 move_iterator& operator++() {++__i; return *this;} 1092 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1093 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1094 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1095 move_iterator& operator--() {--__i; return *this;} 1096 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1097 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1098 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1099 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1100 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1101 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1102 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1103 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1104 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1105 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1106 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1107 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 1108}; 1109 1110template <class _Iter1, class _Iter2> 1111inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1112bool 1113operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1114{ 1115 return __x.base() == __y.base(); 1116} 1117 1118template <class _Iter1, class _Iter2> 1119inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1120bool 1121operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1122{ 1123 return __x.base() < __y.base(); 1124} 1125 1126template <class _Iter1, class _Iter2> 1127inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1128bool 1129operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1130{ 1131 return __x.base() != __y.base(); 1132} 1133 1134template <class _Iter1, class _Iter2> 1135inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1136bool 1137operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1138{ 1139 return __x.base() > __y.base(); 1140} 1141 1142template <class _Iter1, class _Iter2> 1143inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1144bool 1145operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1146{ 1147 return __x.base() >= __y.base(); 1148} 1149 1150template <class _Iter1, class _Iter2> 1151inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1152bool 1153operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1154{ 1155 return __x.base() <= __y.base(); 1156} 1157 1158#ifndef _LIBCPP_CXX03_LANG 1159template <class _Iter1, class _Iter2> 1160inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1161auto 1162operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1163-> decltype(__x.base() - __y.base()) 1164{ 1165 return __x.base() - __y.base(); 1166} 1167#else 1168template <class _Iter1, class _Iter2> 1169inline _LIBCPP_INLINE_VISIBILITY 1170typename move_iterator<_Iter1>::difference_type 1171operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1172{ 1173 return __x.base() - __y.base(); 1174} 1175#endif 1176 1177template <class _Iter> 1178inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1179move_iterator<_Iter> 1180operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1181{ 1182 return move_iterator<_Iter>(__x.base() + __n); 1183} 1184 1185template <class _Iter> 1186inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1187move_iterator<_Iter> 1188make_move_iterator(_Iter __i) 1189{ 1190 return move_iterator<_Iter>(__i); 1191} 1192 1193// __wrap_iter 1194 1195template <class _Iter> class __wrap_iter; 1196 1197template <class _Iter1, class _Iter2> 1198_LIBCPP_INLINE_VISIBILITY 1199bool 1200operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1201 1202template <class _Iter1, class _Iter2> 1203_LIBCPP_INLINE_VISIBILITY 1204bool 1205operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1206 1207template <class _Iter1, class _Iter2> 1208_LIBCPP_INLINE_VISIBILITY 1209bool 1210operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1211 1212template <class _Iter1, class _Iter2> 1213_LIBCPP_INLINE_VISIBILITY 1214bool 1215operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1216 1217template <class _Iter1, class _Iter2> 1218_LIBCPP_INLINE_VISIBILITY 1219bool 1220operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1221 1222template <class _Iter1, class _Iter2> 1223_LIBCPP_INLINE_VISIBILITY 1224bool 1225operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1226 1227#ifndef _LIBCPP_CXX03_LANG 1228template <class _Iter1, class _Iter2> 1229_LIBCPP_INLINE_VISIBILITY 1230auto 1231operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1232-> decltype(__x.base() - __y.base()); 1233#else 1234template <class _Iter1, class _Iter2> 1235_LIBCPP_INLINE_VISIBILITY 1236typename __wrap_iter<_Iter1>::difference_type 1237operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1238#endif 1239 1240template <class _Iter> 1241_LIBCPP_INLINE_VISIBILITY 1242__wrap_iter<_Iter> 1243operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT_DEBUG; 1244 1245template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY copy(_Ip, _Ip, _Op); 1246template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY copy_backward(_B1, _B1, _B2); 1247template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op); 1248template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2); 1249 1250#if _LIBCPP_DEBUG_LEVEL < 2 1251 1252template <class _Tp> 1253_LIBCPP_INLINE_VISIBILITY 1254typename enable_if 1255< 1256 is_trivially_copy_assignable<_Tp>::value, 1257 _Tp* 1258>::type 1259__unwrap_iter(__wrap_iter<_Tp*>); 1260 1261#else 1262 1263template <class _Tp> 1264inline _LIBCPP_INLINE_VISIBILITY 1265typename enable_if 1266< 1267 is_trivially_copy_assignable<_Tp>::value, 1268 __wrap_iter<_Tp*> 1269>::type 1270__unwrap_iter(__wrap_iter<_Tp*> __i); 1271 1272#endif 1273 1274template <class _Iter> 1275class __wrap_iter 1276{ 1277public: 1278 typedef _Iter iterator_type; 1279 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1280 typedef typename iterator_traits<iterator_type>::value_type value_type; 1281 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1282 typedef typename iterator_traits<iterator_type>::pointer pointer; 1283 typedef typename iterator_traits<iterator_type>::reference reference; 1284private: 1285 iterator_type __i; 1286public: 1287 _LIBCPP_INLINE_VISIBILITY __wrap_iter() _NOEXCEPT_DEBUG 1288#if _LIBCPP_STD_VER > 11 1289 : __i{} 1290#endif 1291 { 1292#if _LIBCPP_DEBUG_LEVEL >= 2 1293 __get_db()->__insert_i(this); 1294#endif 1295 } 1296 template <class _Up> _LIBCPP_INLINE_VISIBILITY __wrap_iter(const __wrap_iter<_Up>& __u, 1297 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT_DEBUG 1298 : __i(__u.base()) 1299 { 1300#if _LIBCPP_DEBUG_LEVEL >= 2 1301 __get_db()->__iterator_copy(this, &__u); 1302#endif 1303 } 1304#if _LIBCPP_DEBUG_LEVEL >= 2 1305 _LIBCPP_INLINE_VISIBILITY 1306 __wrap_iter(const __wrap_iter& __x) 1307 : __i(__x.base()) 1308 { 1309 __get_db()->__iterator_copy(this, &__x); 1310 } 1311 _LIBCPP_INLINE_VISIBILITY 1312 __wrap_iter& operator=(const __wrap_iter& __x) 1313 { 1314 if (this != &__x) 1315 { 1316 __get_db()->__iterator_copy(this, &__x); 1317 __i = __x.__i; 1318 } 1319 return *this; 1320 } 1321 _LIBCPP_INLINE_VISIBILITY 1322 ~__wrap_iter() 1323 { 1324 __get_db()->__erase_i(this); 1325 } 1326#endif 1327 _LIBCPP_INLINE_VISIBILITY reference operator*() const _NOEXCEPT_DEBUG 1328 { 1329#if _LIBCPP_DEBUG_LEVEL >= 2 1330 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1331 "Attempted to dereference a non-dereferenceable iterator"); 1332#endif 1333 return *__i; 1334 } 1335 _LIBCPP_INLINE_VISIBILITY pointer operator->() const _NOEXCEPT_DEBUG 1336 { 1337#if _LIBCPP_DEBUG_LEVEL >= 2 1338 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1339 "Attempted to dereference a non-dereferenceable iterator"); 1340#endif 1341 return (pointer)_VSTD::addressof(*__i); 1342 } 1343 _LIBCPP_INLINE_VISIBILITY __wrap_iter& operator++() _NOEXCEPT_DEBUG 1344 { 1345#if _LIBCPP_DEBUG_LEVEL >= 2 1346 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1347 "Attempted to increment non-incrementable iterator"); 1348#endif 1349 ++__i; 1350 return *this; 1351 } 1352 _LIBCPP_INLINE_VISIBILITY __wrap_iter operator++(int) _NOEXCEPT_DEBUG 1353 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1354 _LIBCPP_INLINE_VISIBILITY __wrap_iter& operator--() _NOEXCEPT_DEBUG 1355 { 1356#if _LIBCPP_DEBUG_LEVEL >= 2 1357 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1358 "Attempted to decrement non-decrementable iterator"); 1359#endif 1360 --__i; 1361 return *this; 1362 } 1363 _LIBCPP_INLINE_VISIBILITY __wrap_iter operator--(int) _NOEXCEPT_DEBUG 1364 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1365 _LIBCPP_INLINE_VISIBILITY __wrap_iter operator+ (difference_type __n) const _NOEXCEPT_DEBUG 1366 {__wrap_iter __w(*this); __w += __n; return __w;} 1367 _LIBCPP_INLINE_VISIBILITY __wrap_iter& operator+=(difference_type __n) _NOEXCEPT_DEBUG 1368 { 1369#if _LIBCPP_DEBUG_LEVEL >= 2 1370 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1371 "Attempted to add/subtract iterator outside of valid range"); 1372#endif 1373 __i += __n; 1374 return *this; 1375 } 1376 _LIBCPP_INLINE_VISIBILITY __wrap_iter operator- (difference_type __n) const _NOEXCEPT_DEBUG 1377 {return *this + (-__n);} 1378 _LIBCPP_INLINE_VISIBILITY __wrap_iter& operator-=(difference_type __n) _NOEXCEPT_DEBUG 1379 {*this += -__n; return *this;} 1380 _LIBCPP_INLINE_VISIBILITY reference operator[](difference_type __n) const _NOEXCEPT_DEBUG 1381 { 1382#if _LIBCPP_DEBUG_LEVEL >= 2 1383 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1384 "Attempted to subscript iterator outside of valid range"); 1385#endif 1386 return __i[__n]; 1387 } 1388 1389 _LIBCPP_INLINE_VISIBILITY iterator_type base() const _NOEXCEPT_DEBUG {return __i;} 1390 1391private: 1392#if _LIBCPP_DEBUG_LEVEL >= 2 1393 _LIBCPP_INLINE_VISIBILITY __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1394 { 1395 __get_db()->__insert_ic(this, __p); 1396 } 1397#else 1398 _LIBCPP_INLINE_VISIBILITY __wrap_iter(iterator_type __x) _NOEXCEPT_DEBUG : __i(__x) {} 1399#endif 1400 1401 template <class _Up> friend class __wrap_iter; 1402 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1403 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1404 1405 template <class _Iter1, class _Iter2> 1406 friend 1407 bool 1408 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1409 1410 template <class _Iter1, class _Iter2> 1411 friend 1412 bool 1413 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1414 1415 template <class _Iter1, class _Iter2> 1416 friend 1417 bool 1418 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1419 1420 template <class _Iter1, class _Iter2> 1421 friend 1422 bool 1423 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1424 1425 template <class _Iter1, class _Iter2> 1426 friend 1427 bool 1428 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1429 1430 template <class _Iter1, class _Iter2> 1431 friend 1432 bool 1433 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1434 1435#ifndef _LIBCPP_CXX03_LANG 1436 template <class _Iter1, class _Iter2> 1437 friend 1438 auto 1439 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1440 -> decltype(__x.base() - __y.base()); 1441#else 1442 template <class _Iter1, class _Iter2> 1443 friend 1444 typename __wrap_iter<_Iter1>::difference_type 1445 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1446#endif 1447 1448 template <class _Iter1> 1449 friend 1450 __wrap_iter<_Iter1> 1451 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT_DEBUG; 1452 1453 template <class _Ip, class _Op> friend _Op copy(_Ip, _Ip, _Op); 1454 template <class _B1, class _B2> friend _B2 copy_backward(_B1, _B1, _B2); 1455 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op); 1456 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2); 1457 1458#if _LIBCPP_DEBUG_LEVEL < 2 1459 template <class _Tp> 1460 friend 1461 typename enable_if 1462 < 1463 is_trivially_copy_assignable<_Tp>::value, 1464 _Tp* 1465 >::type 1466 __unwrap_iter(__wrap_iter<_Tp*>); 1467#else 1468 template <class _Tp> 1469 inline _LIBCPP_INLINE_VISIBILITY 1470 typename enable_if 1471 < 1472 is_trivially_copy_assignable<_Tp>::value, 1473 __wrap_iter<_Tp*> 1474 >::type 1475 __unwrap_iter(__wrap_iter<_Tp*> __i); 1476#endif 1477}; 1478 1479template <class _Iter1, class _Iter2> 1480inline _LIBCPP_INLINE_VISIBILITY 1481bool 1482operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1483{ 1484 return __x.base() == __y.base(); 1485} 1486 1487template <class _Iter1, class _Iter2> 1488inline _LIBCPP_INLINE_VISIBILITY 1489bool 1490operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1491{ 1492#if _LIBCPP_DEBUG_LEVEL >= 2 1493 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1494 "Attempted to compare incomparable iterators"); 1495#endif 1496 return __x.base() < __y.base(); 1497} 1498 1499template <class _Iter1, class _Iter2> 1500inline _LIBCPP_INLINE_VISIBILITY 1501bool 1502operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1503{ 1504 return !(__x == __y); 1505} 1506 1507template <class _Iter1, class _Iter2> 1508inline _LIBCPP_INLINE_VISIBILITY 1509bool 1510operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1511{ 1512 return __y < __x; 1513} 1514 1515template <class _Iter1, class _Iter2> 1516inline _LIBCPP_INLINE_VISIBILITY 1517bool 1518operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1519{ 1520 return !(__x < __y); 1521} 1522 1523template <class _Iter1, class _Iter2> 1524inline _LIBCPP_INLINE_VISIBILITY 1525bool 1526operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1527{ 1528 return !(__y < __x); 1529} 1530 1531template <class _Iter1> 1532inline _LIBCPP_INLINE_VISIBILITY 1533bool 1534operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1535{ 1536 return !(__x == __y); 1537} 1538 1539template <class _Iter1> 1540inline _LIBCPP_INLINE_VISIBILITY 1541bool 1542operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1543{ 1544 return __y < __x; 1545} 1546 1547template <class _Iter1> 1548inline _LIBCPP_INLINE_VISIBILITY 1549bool 1550operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1551{ 1552 return !(__x < __y); 1553} 1554 1555template <class _Iter1> 1556inline _LIBCPP_INLINE_VISIBILITY 1557bool 1558operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1559{ 1560 return !(__y < __x); 1561} 1562 1563#ifndef _LIBCPP_CXX03_LANG 1564template <class _Iter1, class _Iter2> 1565inline _LIBCPP_INLINE_VISIBILITY 1566auto 1567operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1568-> decltype(__x.base() - __y.base()) 1569{ 1570#if _LIBCPP_DEBUG_LEVEL >= 2 1571 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1572 "Attempted to subtract incompatible iterators"); 1573#endif 1574 return __x.base() - __y.base(); 1575} 1576#else 1577template <class _Iter1, class _Iter2> 1578inline _LIBCPP_INLINE_VISIBILITY 1579typename __wrap_iter<_Iter1>::difference_type 1580operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1581{ 1582#if _LIBCPP_DEBUG_LEVEL >= 2 1583 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1584 "Attempted to subtract incompatible iterators"); 1585#endif 1586 return __x.base() - __y.base(); 1587} 1588#endif 1589 1590template <class _Iter> 1591inline _LIBCPP_INLINE_VISIBILITY 1592__wrap_iter<_Iter> 1593operator+(typename __wrap_iter<_Iter>::difference_type __n, 1594 __wrap_iter<_Iter> __x) _NOEXCEPT_DEBUG 1595{ 1596 __x += __n; 1597 return __x; 1598} 1599 1600template <class _Iter> 1601struct __libcpp_is_trivial_iterator 1602 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1603 1604template <class _Iter> 1605struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1606 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1607 1608template <class _Iter> 1609struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1610 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1611 1612template <class _Iter> 1613struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1614 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1615 1616 1617template <class _Tp, size_t _Np> 1618inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1619_Tp* 1620begin(_Tp (&__array)[_Np]) 1621{ 1622 return __array; 1623} 1624 1625template <class _Tp, size_t _Np> 1626inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1627_Tp* 1628end(_Tp (&__array)[_Np]) 1629{ 1630 return __array + _Np; 1631} 1632 1633#if !defined(_LIBCPP_CXX03_LANG) 1634 1635template <class _Cp> 1636inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1637auto 1638begin(_Cp& __c) -> decltype(__c.begin()) 1639{ 1640 return __c.begin(); 1641} 1642 1643template <class _Cp> 1644inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1645auto 1646begin(const _Cp& __c) -> decltype(__c.begin()) 1647{ 1648 return __c.begin(); 1649} 1650 1651template <class _Cp> 1652inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1653auto 1654end(_Cp& __c) -> decltype(__c.end()) 1655{ 1656 return __c.end(); 1657} 1658 1659template <class _Cp> 1660inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1661auto 1662end(const _Cp& __c) -> decltype(__c.end()) 1663{ 1664 return __c.end(); 1665} 1666 1667#if _LIBCPP_STD_VER > 11 1668 1669template <class _Tp, size_t _Np> 1670inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1671reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1672{ 1673 return reverse_iterator<_Tp*>(__array + _Np); 1674} 1675 1676template <class _Tp, size_t _Np> 1677inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1678reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1679{ 1680 return reverse_iterator<_Tp*>(__array); 1681} 1682 1683template <class _Ep> 1684inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1685reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1686{ 1687 return reverse_iterator<const _Ep*>(__il.end()); 1688} 1689 1690template <class _Ep> 1691inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1692reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1693{ 1694 return reverse_iterator<const _Ep*>(__il.begin()); 1695} 1696 1697template <class _Cp> 1698inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1699auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1700{ 1701 return _VSTD::begin(__c); 1702} 1703 1704template <class _Cp> 1705inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1706auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1707{ 1708 return _VSTD::end(__c); 1709} 1710 1711template <class _Cp> 1712inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1713auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1714{ 1715 return __c.rbegin(); 1716} 1717 1718template <class _Cp> 1719inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1720auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1721{ 1722 return __c.rbegin(); 1723} 1724 1725template <class _Cp> 1726inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1727auto rend(_Cp& __c) -> decltype(__c.rend()) 1728{ 1729 return __c.rend(); 1730} 1731 1732template <class _Cp> 1733inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1734auto rend(const _Cp& __c) -> decltype(__c.rend()) 1735{ 1736 return __c.rend(); 1737} 1738 1739template <class _Cp> 1740inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1741auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1742{ 1743 return _VSTD::rbegin(__c); 1744} 1745 1746template <class _Cp> 1747inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1748auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1749{ 1750 return _VSTD::rend(__c); 1751} 1752 1753#endif 1754 1755 1756#else // defined(_LIBCPP_CXX03_LANG) 1757 1758template <class _Cp> 1759inline _LIBCPP_INLINE_VISIBILITY 1760typename _Cp::iterator 1761begin(_Cp& __c) 1762{ 1763 return __c.begin(); 1764} 1765 1766template <class _Cp> 1767inline _LIBCPP_INLINE_VISIBILITY 1768typename _Cp::const_iterator 1769begin(const _Cp& __c) 1770{ 1771 return __c.begin(); 1772} 1773 1774template <class _Cp> 1775inline _LIBCPP_INLINE_VISIBILITY 1776typename _Cp::iterator 1777end(_Cp& __c) 1778{ 1779 return __c.end(); 1780} 1781 1782template <class _Cp> 1783inline _LIBCPP_INLINE_VISIBILITY 1784typename _Cp::const_iterator 1785end(const _Cp& __c) 1786{ 1787 return __c.end(); 1788} 1789 1790#endif // !defined(_LIBCPP_CXX03_LANG) 1791 1792#if _LIBCPP_STD_VER > 14 1793template <class _Cont> 1794constexpr auto size(const _Cont& __c) -> decltype(__c.size()) { return __c.size(); } 1795 1796template <class _Tp, size_t _Sz> 1797constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1798 1799template <class _Cont> 1800constexpr auto empty(const _Cont& __c) -> decltype(__c.empty()) { return __c.empty(); } 1801 1802template <class _Tp, size_t _Sz> 1803constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1804 1805template <class _Ep> 1806constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1807 1808template <class _Cont> constexpr 1809auto data(_Cont& __c) -> decltype(__c.data()) { return __c.data(); } 1810 1811template <class _Cont> constexpr 1812auto data(const _Cont& __c) -> decltype(__c.data()) { return __c.data(); } 1813 1814template <class _Tp, size_t _Sz> 1815constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1816 1817template <class _Ep> 1818constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1819#endif 1820 1821 1822_LIBCPP_END_NAMESPACE_STD 1823 1824#endif // _LIBCPP_ITERATOR 1825