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#include <version> 422#ifdef __APPLE__ 423#include <Availability.h> 424#endif 425 426#include <__debug> 427 428#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 429#pragma GCC system_header 430#endif 431 432_LIBCPP_BEGIN_NAMESPACE_STD 433 434struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {}; 435struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {}; 436struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag : public input_iterator_tag {}; 437struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {}; 438struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {}; 439 440template <class _Tp> 441struct __has_iterator_typedefs 442{ 443private: 444 struct __two {char __lx; char __lxx;}; 445 template <class _Up> static __two __test(...); 446 template <class _Up> static char __test(typename std::__void_t<typename _Up::iterator_category>::type* = 0, 447 typename std::__void_t<typename _Up::difference_type>::type* = 0, 448 typename std::__void_t<typename _Up::value_type>::type* = 0, 449 typename std::__void_t<typename _Up::reference>::type* = 0, 450 typename std::__void_t<typename _Up::pointer>::type* = 0 451 ); 452public: 453 static const bool value = sizeof(__test<_Tp>(0,0,0,0,0)) == 1; 454}; 455 456 457template <class _Tp> 458struct __has_iterator_category 459{ 460private: 461 struct __two {char __lx; char __lxx;}; 462 template <class _Up> static __two __test(...); 463 template <class _Up> static char __test(typename _Up::iterator_category* = 0); 464public: 465 static const bool value = sizeof(__test<_Tp>(0)) == 1; 466}; 467 468template <class _Iter, bool> struct __iterator_traits_impl {}; 469 470template <class _Iter> 471struct __iterator_traits_impl<_Iter, true> 472{ 473 typedef typename _Iter::difference_type difference_type; 474 typedef typename _Iter::value_type value_type; 475 typedef typename _Iter::pointer pointer; 476 typedef typename _Iter::reference reference; 477 typedef typename _Iter::iterator_category iterator_category; 478}; 479 480template <class _Iter, bool> struct __iterator_traits {}; 481 482template <class _Iter> 483struct __iterator_traits<_Iter, true> 484 : __iterator_traits_impl 485 < 486 _Iter, 487 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value || 488 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value 489 > 490{}; 491 492// iterator_traits<Iterator> will only have the nested types if Iterator::iterator_category 493// exists. Else iterator_traits<Iterator> will be an empty class. This is a 494// conforming extension which allows some programs to compile and behave as 495// the client expects instead of failing at compile time. 496 497template <class _Iter> 498struct _LIBCPP_TEMPLATE_VIS iterator_traits 499 : __iterator_traits<_Iter, __has_iterator_typedefs<_Iter>::value> {}; 500 501template<class _Tp> 502struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*> 503{ 504 typedef ptrdiff_t difference_type; 505 typedef typename remove_cv<_Tp>::type value_type; 506 typedef _Tp* pointer; 507 typedef _Tp& reference; 508 typedef random_access_iterator_tag iterator_category; 509}; 510 511template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value> 512struct __has_iterator_category_convertible_to 513 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value> 514{}; 515 516template <class _Tp, class _Up> 517struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {}; 518 519template <class _Tp> 520struct __is_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {}; 521 522template <class _Tp> 523struct __is_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {}; 524 525template <class _Tp> 526struct __is_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {}; 527 528template <class _Tp> 529struct __is_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {}; 530 531template <class _Tp> 532struct __is_exactly_input_iterator 533 : public integral_constant<bool, 534 __has_iterator_category_convertible_to<_Tp, input_iterator_tag>::value && 535 !__has_iterator_category_convertible_to<_Tp, forward_iterator_tag>::value> {}; 536 537template<class _Category, class _Tp, class _Distance = ptrdiff_t, 538 class _Pointer = _Tp*, class _Reference = _Tp&> 539struct _LIBCPP_TEMPLATE_VIS iterator 540{ 541 typedef _Tp value_type; 542 typedef _Distance difference_type; 543 typedef _Pointer pointer; 544 typedef _Reference reference; 545 typedef _Category iterator_category; 546}; 547 548template <class _InputIter> 549inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 550void __advance(_InputIter& __i, 551 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag) 552{ 553 for (; __n > 0; --__n) 554 ++__i; 555} 556 557template <class _BiDirIter> 558inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 559void __advance(_BiDirIter& __i, 560 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag) 561{ 562 if (__n >= 0) 563 for (; __n > 0; --__n) 564 ++__i; 565 else 566 for (; __n < 0; ++__n) 567 --__i; 568} 569 570template <class _RandIter> 571inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 572void __advance(_RandIter& __i, 573 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag) 574{ 575 __i += __n; 576} 577 578template <class _InputIter> 579inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 580void advance(_InputIter& __i, 581 typename iterator_traits<_InputIter>::difference_type __n) 582{ 583 __advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category()); 584} 585 586template <class _InputIter> 587inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 588typename iterator_traits<_InputIter>::difference_type 589__distance(_InputIter __first, _InputIter __last, input_iterator_tag) 590{ 591 typename iterator_traits<_InputIter>::difference_type __r(0); 592 for (; __first != __last; ++__first) 593 ++__r; 594 return __r; 595} 596 597template <class _RandIter> 598inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 599typename iterator_traits<_RandIter>::difference_type 600__distance(_RandIter __first, _RandIter __last, random_access_iterator_tag) 601{ 602 return __last - __first; 603} 604 605template <class _InputIter> 606inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 607typename iterator_traits<_InputIter>::difference_type 608distance(_InputIter __first, _InputIter __last) 609{ 610 return __distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category()); 611} 612 613template <class _InputIter> 614inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 615typename enable_if 616< 617 __is_input_iterator<_InputIter>::value, 618 _InputIter 619>::type 620next(_InputIter __x, 621 typename iterator_traits<_InputIter>::difference_type __n = 1) 622{ 623 _VSTD::advance(__x, __n); 624 return __x; 625} 626 627template <class _BidirectionalIter> 628inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 629typename enable_if 630< 631 __is_bidirectional_iterator<_BidirectionalIter>::value, 632 _BidirectionalIter 633>::type 634prev(_BidirectionalIter __x, 635 typename iterator_traits<_BidirectionalIter>::difference_type __n = 1) 636{ 637 _VSTD::advance(__x, -__n); 638 return __x; 639} 640 641 642template <class _Tp, class = void> 643struct __is_stashing_iterator : false_type {}; 644 645template <class _Tp> 646struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type> 647 : true_type {}; 648 649template <class _Iter> 650class _LIBCPP_TEMPLATE_VIS reverse_iterator 651 : public iterator<typename iterator_traits<_Iter>::iterator_category, 652 typename iterator_traits<_Iter>::value_type, 653 typename iterator_traits<_Iter>::difference_type, 654 typename iterator_traits<_Iter>::pointer, 655 typename iterator_traits<_Iter>::reference> 656{ 657private: 658 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break 659 660 static_assert(!__is_stashing_iterator<_Iter>::value, 661 "The specified iterator type cannot be used with reverse_iterator; " 662 "Using stashing iterators with reverse_iterator causes undefined behavior"); 663 664protected: 665 _Iter current; 666public: 667 typedef _Iter iterator_type; 668 typedef typename iterator_traits<_Iter>::difference_type difference_type; 669 typedef typename iterator_traits<_Iter>::reference reference; 670 typedef typename iterator_traits<_Iter>::pointer pointer; 671 672 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 673 reverse_iterator() : __t(), current() {} 674 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 675 explicit reverse_iterator(_Iter __x) : __t(__x), current(__x) {} 676 template <class _Up> 677 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 678 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {} 679 template <class _Up> 680 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 681 reverse_iterator& operator=(const reverse_iterator<_Up>& __u) 682 { __t = current = __u.base(); return *this; } 683 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 684 _Iter base() const {return current;} 685 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 686 reference operator*() const {_Iter __tmp = current; return *--__tmp;} 687 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 688 pointer operator->() const {return _VSTD::addressof(operator*());} 689 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 690 reverse_iterator& operator++() {--current; return *this;} 691 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 692 reverse_iterator operator++(int) {reverse_iterator __tmp(*this); --current; return __tmp;} 693 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 694 reverse_iterator& operator--() {++current; return *this;} 695 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 696 reverse_iterator operator--(int) {reverse_iterator __tmp(*this); ++current; return __tmp;} 697 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 698 reverse_iterator operator+ (difference_type __n) const {return reverse_iterator(current - __n);} 699 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 700 reverse_iterator& operator+=(difference_type __n) {current -= __n; return *this;} 701 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 702 reverse_iterator operator- (difference_type __n) const {return reverse_iterator(current + __n);} 703 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 704 reverse_iterator& operator-=(difference_type __n) {current += __n; return *this;} 705 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 706 reference operator[](difference_type __n) const {return *(*this + __n);} 707}; 708 709template <class _Iter1, class _Iter2> 710inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 711bool 712operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 713{ 714 return __x.base() == __y.base(); 715} 716 717template <class _Iter1, class _Iter2> 718inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 719bool 720operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 721{ 722 return __x.base() > __y.base(); 723} 724 725template <class _Iter1, class _Iter2> 726inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 727bool 728operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 729{ 730 return __x.base() != __y.base(); 731} 732 733template <class _Iter1, class _Iter2> 734inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 735bool 736operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 737{ 738 return __x.base() < __y.base(); 739} 740 741template <class _Iter1, class _Iter2> 742inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 743bool 744operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 745{ 746 return __x.base() <= __y.base(); 747} 748 749template <class _Iter1, class _Iter2> 750inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 751bool 752operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 753{ 754 return __x.base() >= __y.base(); 755} 756 757#ifndef _LIBCPP_CXX03_LANG 758template <class _Iter1, class _Iter2> 759inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 760auto 761operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 762-> decltype(__y.base() - __x.base()) 763{ 764 return __y.base() - __x.base(); 765} 766#else 767template <class _Iter1, class _Iter2> 768inline _LIBCPP_INLINE_VISIBILITY 769typename reverse_iterator<_Iter1>::difference_type 770operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y) 771{ 772 return __y.base() - __x.base(); 773} 774#endif 775 776template <class _Iter> 777inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 778reverse_iterator<_Iter> 779operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x) 780{ 781 return reverse_iterator<_Iter>(__x.base() - __n); 782} 783 784#if _LIBCPP_STD_VER > 11 785template <class _Iter> 786inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 787reverse_iterator<_Iter> make_reverse_iterator(_Iter __i) 788{ 789 return reverse_iterator<_Iter>(__i); 790} 791#endif 792 793template <class _Container> 794class _LIBCPP_TEMPLATE_VIS back_insert_iterator 795 : public iterator<output_iterator_tag, 796 void, 797 void, 798 void, 799 void> 800{ 801protected: 802 _Container* container; 803public: 804 typedef _Container container_type; 805 806 _LIBCPP_INLINE_VISIBILITY explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 807 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(const typename _Container::value_type& __value_) 808 {container->push_back(__value_); return *this;} 809#ifndef _LIBCPP_CXX03_LANG 810 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator=(typename _Container::value_type&& __value_) 811 {container->push_back(_VSTD::move(__value_)); return *this;} 812#endif // _LIBCPP_CXX03_LANG 813 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator*() {return *this;} 814 _LIBCPP_INLINE_VISIBILITY back_insert_iterator& operator++() {return *this;} 815 _LIBCPP_INLINE_VISIBILITY back_insert_iterator operator++(int) {return *this;} 816}; 817 818template <class _Container> 819inline _LIBCPP_INLINE_VISIBILITY 820back_insert_iterator<_Container> 821back_inserter(_Container& __x) 822{ 823 return back_insert_iterator<_Container>(__x); 824} 825 826template <class _Container> 827class _LIBCPP_TEMPLATE_VIS front_insert_iterator 828 : public iterator<output_iterator_tag, 829 void, 830 void, 831 void, 832 void> 833{ 834protected: 835 _Container* container; 836public: 837 typedef _Container container_type; 838 839 _LIBCPP_INLINE_VISIBILITY explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 840 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(const typename _Container::value_type& __value_) 841 {container->push_front(__value_); return *this;} 842#ifndef _LIBCPP_CXX03_LANG 843 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator=(typename _Container::value_type&& __value_) 844 {container->push_front(_VSTD::move(__value_)); return *this;} 845#endif // _LIBCPP_CXX03_LANG 846 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator*() {return *this;} 847 _LIBCPP_INLINE_VISIBILITY front_insert_iterator& operator++() {return *this;} 848 _LIBCPP_INLINE_VISIBILITY front_insert_iterator operator++(int) {return *this;} 849}; 850 851template <class _Container> 852inline _LIBCPP_INLINE_VISIBILITY 853front_insert_iterator<_Container> 854front_inserter(_Container& __x) 855{ 856 return front_insert_iterator<_Container>(__x); 857} 858 859template <class _Container> 860class _LIBCPP_TEMPLATE_VIS insert_iterator 861 : public iterator<output_iterator_tag, 862 void, 863 void, 864 void, 865 void> 866{ 867protected: 868 _Container* container; 869 typename _Container::iterator iter; 870public: 871 typedef _Container container_type; 872 873 _LIBCPP_INLINE_VISIBILITY insert_iterator(_Container& __x, typename _Container::iterator __i) 874 : container(_VSTD::addressof(__x)), iter(__i) {} 875 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(const typename _Container::value_type& __value_) 876 {iter = container->insert(iter, __value_); ++iter; return *this;} 877#ifndef _LIBCPP_CXX03_LANG 878 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator=(typename _Container::value_type&& __value_) 879 {iter = container->insert(iter, _VSTD::move(__value_)); ++iter; return *this;} 880#endif // _LIBCPP_CXX03_LANG 881 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator*() {return *this;} 882 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++() {return *this;} 883 _LIBCPP_INLINE_VISIBILITY insert_iterator& operator++(int) {return *this;} 884}; 885 886template <class _Container> 887inline _LIBCPP_INLINE_VISIBILITY 888insert_iterator<_Container> 889inserter(_Container& __x, typename _Container::iterator __i) 890{ 891 return insert_iterator<_Container>(__x, __i); 892} 893 894template <class _Tp, class _CharT = char, 895 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t> 896class _LIBCPP_TEMPLATE_VIS istream_iterator 897 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&> 898{ 899public: 900 typedef _CharT char_type; 901 typedef _Traits traits_type; 902 typedef basic_istream<_CharT,_Traits> istream_type; 903private: 904 istream_type* __in_stream_; 905 _Tp __value_; 906public: 907 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istream_iterator() : __in_stream_(0), __value_() {} 908 _LIBCPP_INLINE_VISIBILITY istream_iterator(istream_type& __s) : __in_stream_(_VSTD::addressof(__s)) 909 { 910 if (!(*__in_stream_ >> __value_)) 911 __in_stream_ = 0; 912 } 913 914 _LIBCPP_INLINE_VISIBILITY const _Tp& operator*() const {return __value_;} 915 _LIBCPP_INLINE_VISIBILITY const _Tp* operator->() const {return _VSTD::addressof((operator*()));} 916 _LIBCPP_INLINE_VISIBILITY istream_iterator& operator++() 917 { 918 if (!(*__in_stream_ >> __value_)) 919 __in_stream_ = 0; 920 return *this; 921 } 922 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int) 923 {istream_iterator __t(*this); ++(*this); return __t;} 924 925 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 926 friend _LIBCPP_INLINE_VISIBILITY 927 bool 928 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 929 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 930 931 template <class _Up, class _CharU, class _TraitsU, class _DistanceU> 932 friend _LIBCPP_INLINE_VISIBILITY 933 bool 934 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x, 935 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y); 936}; 937 938template <class _Tp, class _CharT, class _Traits, class _Distance> 939inline _LIBCPP_INLINE_VISIBILITY 940bool 941operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 942 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 943{ 944 return __x.__in_stream_ == __y.__in_stream_; 945} 946 947template <class _Tp, class _CharT, class _Traits, class _Distance> 948inline _LIBCPP_INLINE_VISIBILITY 949bool 950operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x, 951 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y) 952{ 953 return !(__x == __y); 954} 955 956template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> > 957class _LIBCPP_TEMPLATE_VIS ostream_iterator 958 : public iterator<output_iterator_tag, void, void, void, void> 959{ 960public: 961 typedef _CharT char_type; 962 typedef _Traits traits_type; 963 typedef basic_ostream<_CharT,_Traits> ostream_type; 964private: 965 ostream_type* __out_stream_; 966 const char_type* __delim_; 967public: 968 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT 969 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {} 970 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT 971 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {} 972 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_) 973 { 974 *__out_stream_ << __value_; 975 if (__delim_) 976 *__out_stream_ << __delim_; 977 return *this; 978 } 979 980 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;} 981 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;} 982 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;} 983}; 984 985template<class _CharT, class _Traits> 986class _LIBCPP_TEMPLATE_VIS istreambuf_iterator 987 : public iterator<input_iterator_tag, _CharT, 988 typename _Traits::off_type, _CharT*, 989 _CharT> 990{ 991public: 992 typedef _CharT char_type; 993 typedef _Traits traits_type; 994 typedef typename _Traits::int_type int_type; 995 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 996 typedef basic_istream<_CharT,_Traits> istream_type; 997private: 998 mutable streambuf_type* __sbuf_; 999 1000 class __proxy 1001 { 1002 char_type __keep_; 1003 streambuf_type* __sbuf_; 1004 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s) 1005 : __keep_(__c), __sbuf_(__s) {} 1006 friend class istreambuf_iterator; 1007 public: 1008 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;} 1009 }; 1010 1011 _LIBCPP_INLINE_VISIBILITY 1012 bool __test_for_eof() const 1013 { 1014 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof())) 1015 __sbuf_ = 0; 1016 return __sbuf_ == 0; 1017 } 1018public: 1019 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {} 1020 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT 1021 : __sbuf_(__s.rdbuf()) {} 1022 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1023 : __sbuf_(__s) {} 1024 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT 1025 : __sbuf_(__p.__sbuf_) {} 1026 1027 _LIBCPP_INLINE_VISIBILITY char_type operator*() const 1028 {return static_cast<char_type>(__sbuf_->sgetc());} 1029 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++() 1030 { 1031 __sbuf_->sbumpc(); 1032 return *this; 1033 } 1034 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int) 1035 { 1036 return __proxy(__sbuf_->sbumpc(), __sbuf_); 1037 } 1038 1039 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const 1040 {return __test_for_eof() == __b.__test_for_eof();} 1041}; 1042 1043template <class _CharT, class _Traits> 1044inline _LIBCPP_INLINE_VISIBILITY 1045bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a, 1046 const istreambuf_iterator<_CharT,_Traits>& __b) 1047 {return __a.equal(__b);} 1048 1049template <class _CharT, class _Traits> 1050inline _LIBCPP_INLINE_VISIBILITY 1051bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a, 1052 const istreambuf_iterator<_CharT,_Traits>& __b) 1053 {return !__a.equal(__b);} 1054 1055template <class _CharT, class _Traits> 1056class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator 1057 : public iterator<output_iterator_tag, void, void, void, void> 1058{ 1059public: 1060 typedef _CharT char_type; 1061 typedef _Traits traits_type; 1062 typedef basic_streambuf<_CharT,_Traits> streambuf_type; 1063 typedef basic_ostream<_CharT,_Traits> ostream_type; 1064private: 1065 streambuf_type* __sbuf_; 1066public: 1067 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT 1068 : __sbuf_(__s.rdbuf()) {} 1069 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT 1070 : __sbuf_(__s) {} 1071 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c) 1072 { 1073 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof())) 1074 __sbuf_ = 0; 1075 return *this; 1076 } 1077 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;} 1078 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;} 1079 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;} 1080 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;} 1081 1082#if !defined(__APPLE__) || \ 1083 (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \ 1084 (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0) 1085 1086 template <class _Ch, class _Tr> 1087 friend 1088 _LIBCPP_HIDDEN 1089 ostreambuf_iterator<_Ch, _Tr> 1090 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s, 1091 const _Ch* __ob, const _Ch* __op, const _Ch* __oe, 1092 ios_base& __iob, _Ch __fl); 1093#endif 1094}; 1095 1096template <class _Iter> 1097class _LIBCPP_TEMPLATE_VIS move_iterator 1098{ 1099private: 1100 _Iter __i; 1101public: 1102 typedef _Iter iterator_type; 1103 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1104 typedef typename iterator_traits<iterator_type>::value_type value_type; 1105 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1106 typedef iterator_type pointer; 1107#ifndef _LIBCPP_CXX03_LANG 1108 typedef typename iterator_traits<iterator_type>::reference __reference; 1109 typedef typename conditional< 1110 is_reference<__reference>::value, 1111 typename remove_reference<__reference>::type&&, 1112 __reference 1113 >::type reference; 1114#else 1115 typedef typename iterator_traits<iterator_type>::reference reference; 1116#endif 1117 1118 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1119 move_iterator() : __i() {} 1120 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1121 explicit move_iterator(_Iter __x) : __i(__x) {} 1122 template <class _Up> 1123 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1124 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {} 1125 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;} 1126 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1127 reference operator*() const { return static_cast<reference>(*__i); } 1128 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1129 pointer operator->() const { return __i;} 1130 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1131 move_iterator& operator++() {++__i; return *this;} 1132 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1133 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;} 1134 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1135 move_iterator& operator--() {--__i; return *this;} 1136 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1137 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;} 1138 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1139 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);} 1140 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1141 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;} 1142 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1143 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);} 1144 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1145 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;} 1146 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1147 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); } 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 1158template <class _Iter1, class _Iter2> 1159inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1160bool 1161operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1162{ 1163 return __x.base() < __y.base(); 1164} 1165 1166template <class _Iter1, class _Iter2> 1167inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1168bool 1169operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1170{ 1171 return __x.base() != __y.base(); 1172} 1173 1174template <class _Iter1, class _Iter2> 1175inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1176bool 1177operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1178{ 1179 return __x.base() > __y.base(); 1180} 1181 1182template <class _Iter1, class _Iter2> 1183inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1184bool 1185operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1186{ 1187 return __x.base() >= __y.base(); 1188} 1189 1190template <class _Iter1, class _Iter2> 1191inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1192bool 1193operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1194{ 1195 return __x.base() <= __y.base(); 1196} 1197 1198#ifndef _LIBCPP_CXX03_LANG 1199template <class _Iter1, class _Iter2> 1200inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1201auto 1202operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1203-> decltype(__x.base() - __y.base()) 1204{ 1205 return __x.base() - __y.base(); 1206} 1207#else 1208template <class _Iter1, class _Iter2> 1209inline _LIBCPP_INLINE_VISIBILITY 1210typename move_iterator<_Iter1>::difference_type 1211operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) 1212{ 1213 return __x.base() - __y.base(); 1214} 1215#endif 1216 1217template <class _Iter> 1218inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1219move_iterator<_Iter> 1220operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) 1221{ 1222 return move_iterator<_Iter>(__x.base() + __n); 1223} 1224 1225template <class _Iter> 1226inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1227move_iterator<_Iter> 1228make_move_iterator(_Iter __i) 1229{ 1230 return move_iterator<_Iter>(__i); 1231} 1232 1233// __wrap_iter 1234 1235template <class _Iter> class __wrap_iter; 1236 1237template <class _Iter1, class _Iter2> 1238_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1239bool 1240operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1241 1242template <class _Iter1, class _Iter2> 1243_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1244bool 1245operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1246 1247template <class _Iter1, class _Iter2> 1248_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1249bool 1250operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1251 1252template <class _Iter1, class _Iter2> 1253_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1254bool 1255operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1256 1257template <class _Iter1, class _Iter2> 1258_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1259bool 1260operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1261 1262template <class _Iter1, class _Iter2> 1263_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1264bool 1265operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1266 1267#ifndef _LIBCPP_CXX03_LANG 1268template <class _Iter1, class _Iter2> 1269_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1270auto 1271operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1272-> decltype(__x.base() - __y.base()); 1273#else 1274template <class _Iter1, class _Iter2> 1275_LIBCPP_INLINE_VISIBILITY 1276typename __wrap_iter<_Iter1>::difference_type 1277operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1278#endif 1279 1280template <class _Iter> 1281_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1282__wrap_iter<_Iter> 1283operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT_DEBUG; 1284 1285template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY copy(_Ip, _Ip, _Op); 1286template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY copy_backward(_B1, _B1, _B2); 1287template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op); 1288template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2); 1289 1290#if _LIBCPP_DEBUG_LEVEL < 2 1291 1292template <class _Tp> 1293_LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1294typename enable_if 1295< 1296 is_trivially_copy_assignable<_Tp>::value, 1297 _Tp* 1298>::type 1299__unwrap_iter(__wrap_iter<_Tp*>); 1300 1301#else 1302 1303template <class _Tp> 1304inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1305typename enable_if 1306< 1307 is_trivially_copy_assignable<_Tp>::value, 1308 __wrap_iter<_Tp*> 1309>::type 1310__unwrap_iter(__wrap_iter<_Tp*> __i); 1311 1312#endif 1313 1314template <class _Iter> 1315class __wrap_iter 1316{ 1317public: 1318 typedef _Iter iterator_type; 1319 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category; 1320 typedef typename iterator_traits<iterator_type>::value_type value_type; 1321 typedef typename iterator_traits<iterator_type>::difference_type difference_type; 1322 typedef typename iterator_traits<iterator_type>::pointer pointer; 1323 typedef typename iterator_traits<iterator_type>::reference reference; 1324private: 1325 iterator_type __i; 1326public: 1327 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT_DEBUG 1328#if _LIBCPP_STD_VER > 11 1329 : __i{} 1330#endif 1331 { 1332#if _LIBCPP_DEBUG_LEVEL >= 2 1333 __get_db()->__insert_i(this); 1334#endif 1335 } 1336 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1337 __wrap_iter(const __wrap_iter<_Up>& __u, 1338 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT_DEBUG 1339 : __i(__u.base()) 1340 { 1341#if _LIBCPP_DEBUG_LEVEL >= 2 1342 __get_db()->__iterator_copy(this, &__u); 1343#endif 1344 } 1345#if _LIBCPP_DEBUG_LEVEL >= 2 1346 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1347 __wrap_iter(const __wrap_iter& __x) 1348 : __i(__x.base()) 1349 { 1350 __get_db()->__iterator_copy(this, &__x); 1351 } 1352 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1353 __wrap_iter& operator=(const __wrap_iter& __x) 1354 { 1355 if (this != &__x) 1356 { 1357 __get_db()->__iterator_copy(this, &__x); 1358 __i = __x.__i; 1359 } 1360 return *this; 1361 } 1362 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1363 ~__wrap_iter() 1364 { 1365 __get_db()->__erase_i(this); 1366 } 1367#endif 1368 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT_DEBUG 1369 { 1370#if _LIBCPP_DEBUG_LEVEL >= 2 1371 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1372 "Attempted to dereference a non-dereferenceable iterator"); 1373#endif 1374 return *__i; 1375 } 1376 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT_DEBUG 1377 { 1378#if _LIBCPP_DEBUG_LEVEL >= 2 1379 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1380 "Attempted to dereference a non-dereferenceable iterator"); 1381#endif 1382 return (pointer)_VSTD::addressof(*__i); 1383 } 1384 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT_DEBUG 1385 { 1386#if _LIBCPP_DEBUG_LEVEL >= 2 1387 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this), 1388 "Attempted to increment non-incrementable iterator"); 1389#endif 1390 ++__i; 1391 return *this; 1392 } 1393 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT_DEBUG 1394 {__wrap_iter __tmp(*this); ++(*this); return __tmp;} 1395 1396 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT_DEBUG 1397 { 1398#if _LIBCPP_DEBUG_LEVEL >= 2 1399 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this), 1400 "Attempted to decrement non-decrementable iterator"); 1401#endif 1402 --__i; 1403 return *this; 1404 } 1405 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT_DEBUG 1406 {__wrap_iter __tmp(*this); --(*this); return __tmp;} 1407 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT_DEBUG 1408 {__wrap_iter __w(*this); __w += __n; return __w;} 1409 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT_DEBUG 1410 { 1411#if _LIBCPP_DEBUG_LEVEL >= 2 1412 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n), 1413 "Attempted to add/subtract iterator outside of valid range"); 1414#endif 1415 __i += __n; 1416 return *this; 1417 } 1418 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT_DEBUG 1419 {return *this + (-__n);} 1420 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT_DEBUG 1421 {*this += -__n; return *this;} 1422 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT_DEBUG 1423 { 1424#if _LIBCPP_DEBUG_LEVEL >= 2 1425 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n), 1426 "Attempted to subscript iterator outside of valid range"); 1427#endif 1428 return __i[__n]; 1429 } 1430 1431 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT_DEBUG {return __i;} 1432 1433private: 1434#if _LIBCPP_DEBUG_LEVEL >= 2 1435 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x) 1436 { 1437 __get_db()->__insert_ic(this, __p); 1438 } 1439#else 1440 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT_DEBUG : __i(__x) {} 1441#endif 1442 1443 template <class _Up> friend class __wrap_iter; 1444 template <class _CharT, class _Traits, class _Alloc> friend class basic_string; 1445 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector; 1446 template <class _Tp, ptrdiff_t> friend class _LIBCPP_TEMPLATE_VIS span; 1447 1448 template <class _Iter1, class _Iter2> 1449 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1450 bool 1451 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1452 1453 template <class _Iter1, class _Iter2> 1454 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1455 bool 1456 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1457 1458 template <class _Iter1, class _Iter2> 1459 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1460 bool 1461 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1462 1463 template <class _Iter1, class _Iter2> 1464 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1465 bool 1466 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1467 1468 template <class _Iter1, class _Iter2> 1469 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1470 bool 1471 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1472 1473 template <class _Iter1, class _Iter2> 1474 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1475 bool 1476 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1477 1478#ifndef _LIBCPP_CXX03_LANG 1479 template <class _Iter1, class _Iter2> 1480 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1481 auto 1482 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1483 -> decltype(__x.base() - __y.base()); 1484#else 1485 template <class _Iter1, class _Iter2> 1486 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1487 typename __wrap_iter<_Iter1>::difference_type 1488 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG; 1489#endif 1490 1491 template <class _Iter1> 1492 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1493 __wrap_iter<_Iter1> 1494 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT_DEBUG; 1495 1496 template <class _Ip, class _Op> friend _Op copy(_Ip, _Ip, _Op); 1497 template <class _B1, class _B2> friend _B2 copy_backward(_B1, _B1, _B2); 1498 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op); 1499 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2); 1500 1501#if _LIBCPP_DEBUG_LEVEL < 2 1502 template <class _Tp> 1503 _LIBCPP_CONSTEXPR_IF_NODEBUG friend 1504 typename enable_if 1505 < 1506 is_trivially_copy_assignable<_Tp>::value, 1507 _Tp* 1508 >::type 1509 __unwrap_iter(__wrap_iter<_Tp*>); 1510#else 1511 template <class _Tp> 1512 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1513 typename enable_if 1514 < 1515 is_trivially_copy_assignable<_Tp>::value, 1516 __wrap_iter<_Tp*> 1517 >::type 1518 __unwrap_iter(__wrap_iter<_Tp*> __i); 1519#endif 1520}; 1521 1522template <class _Iter1, class _Iter2> 1523inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1524bool 1525operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1526{ 1527 return __x.base() == __y.base(); 1528} 1529 1530template <class _Iter1, class _Iter2> 1531inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1532bool 1533operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1534{ 1535#if _LIBCPP_DEBUG_LEVEL >= 2 1536 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1537 "Attempted to compare incomparable iterators"); 1538#endif 1539 return __x.base() < __y.base(); 1540} 1541 1542template <class _Iter1, class _Iter2> 1543inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1544bool 1545operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1546{ 1547 return !(__x == __y); 1548} 1549 1550template <class _Iter1, class _Iter2> 1551inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1552bool 1553operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1554{ 1555 return __y < __x; 1556} 1557 1558template <class _Iter1, class _Iter2> 1559inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1560bool 1561operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1562{ 1563 return !(__x < __y); 1564} 1565 1566template <class _Iter1, class _Iter2> 1567inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1568bool 1569operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1570{ 1571 return !(__y < __x); 1572} 1573 1574template <class _Iter1> 1575inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1576bool 1577operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1578{ 1579 return !(__x == __y); 1580} 1581 1582template <class _Iter1> 1583inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1584bool 1585operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1586{ 1587 return __y < __x; 1588} 1589 1590template <class _Iter1> 1591inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1592bool 1593operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1594{ 1595 return !(__x < __y); 1596} 1597 1598template <class _Iter1> 1599inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1600bool 1601operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG 1602{ 1603 return !(__y < __x); 1604} 1605 1606#ifndef _LIBCPP_CXX03_LANG 1607template <class _Iter1, class _Iter2> 1608inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1609auto 1610operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1611-> decltype(__x.base() - __y.base()) 1612{ 1613#if _LIBCPP_DEBUG_LEVEL >= 2 1614 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1615 "Attempted to subtract incompatible iterators"); 1616#endif 1617 return __x.base() - __y.base(); 1618} 1619#else 1620template <class _Iter1, class _Iter2> 1621inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1622typename __wrap_iter<_Iter1>::difference_type 1623operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG 1624{ 1625#if _LIBCPP_DEBUG_LEVEL >= 2 1626 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y), 1627 "Attempted to subtract incompatible iterators"); 1628#endif 1629 return __x.base() - __y.base(); 1630} 1631#endif 1632 1633template <class _Iter> 1634inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG 1635__wrap_iter<_Iter> 1636operator+(typename __wrap_iter<_Iter>::difference_type __n, 1637 __wrap_iter<_Iter> __x) _NOEXCEPT_DEBUG 1638{ 1639 __x += __n; 1640 return __x; 1641} 1642 1643template <class _Iter> 1644struct __libcpp_is_trivial_iterator 1645 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {}; 1646 1647template <class _Iter> 1648struct __libcpp_is_trivial_iterator<move_iterator<_Iter> > 1649 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1650 1651template <class _Iter> 1652struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> > 1653 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1654 1655template <class _Iter> 1656struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> > 1657 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {}; 1658 1659 1660template <class _Tp, size_t _Np> 1661inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1662_Tp* 1663begin(_Tp (&__array)[_Np]) 1664{ 1665 return __array; 1666} 1667 1668template <class _Tp, size_t _Np> 1669inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1670_Tp* 1671end(_Tp (&__array)[_Np]) 1672{ 1673 return __array + _Np; 1674} 1675 1676#if !defined(_LIBCPP_CXX03_LANG) 1677 1678template <class _Cp> 1679inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1680auto 1681begin(_Cp& __c) -> decltype(__c.begin()) 1682{ 1683 return __c.begin(); 1684} 1685 1686template <class _Cp> 1687inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1688auto 1689begin(const _Cp& __c) -> decltype(__c.begin()) 1690{ 1691 return __c.begin(); 1692} 1693 1694template <class _Cp> 1695inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1696auto 1697end(_Cp& __c) -> decltype(__c.end()) 1698{ 1699 return __c.end(); 1700} 1701 1702template <class _Cp> 1703inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1704auto 1705end(const _Cp& __c) -> decltype(__c.end()) 1706{ 1707 return __c.end(); 1708} 1709 1710#if _LIBCPP_STD_VER > 11 1711 1712template <class _Tp, size_t _Np> 1713inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1714reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np]) 1715{ 1716 return reverse_iterator<_Tp*>(__array + _Np); 1717} 1718 1719template <class _Tp, size_t _Np> 1720inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1721reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np]) 1722{ 1723 return reverse_iterator<_Tp*>(__array); 1724} 1725 1726template <class _Ep> 1727inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1728reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il) 1729{ 1730 return reverse_iterator<const _Ep*>(__il.end()); 1731} 1732 1733template <class _Ep> 1734inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1735reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il) 1736{ 1737 return reverse_iterator<const _Ep*>(__il.begin()); 1738} 1739 1740template <class _Cp> 1741inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1742auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c)) 1743{ 1744 return _VSTD::begin(__c); 1745} 1746 1747template <class _Cp> 1748inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11 1749auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c)) 1750{ 1751 return _VSTD::end(__c); 1752} 1753 1754template <class _Cp> 1755inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1756auto rbegin(_Cp& __c) -> decltype(__c.rbegin()) 1757{ 1758 return __c.rbegin(); 1759} 1760 1761template <class _Cp> 1762inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1763auto rbegin(const _Cp& __c) -> decltype(__c.rbegin()) 1764{ 1765 return __c.rbegin(); 1766} 1767 1768template <class _Cp> 1769inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1770auto rend(_Cp& __c) -> decltype(__c.rend()) 1771{ 1772 return __c.rend(); 1773} 1774 1775template <class _Cp> 1776inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1777auto rend(const _Cp& __c) -> decltype(__c.rend()) 1778{ 1779 return __c.rend(); 1780} 1781 1782template <class _Cp> 1783inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1784auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c)) 1785{ 1786 return _VSTD::rbegin(__c); 1787} 1788 1789template <class _Cp> 1790inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 1791auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c)) 1792{ 1793 return _VSTD::rend(__c); 1794} 1795 1796#endif 1797 1798 1799#else // defined(_LIBCPP_CXX03_LANG) 1800 1801template <class _Cp> 1802inline _LIBCPP_INLINE_VISIBILITY 1803typename _Cp::iterator 1804begin(_Cp& __c) 1805{ 1806 return __c.begin(); 1807} 1808 1809template <class _Cp> 1810inline _LIBCPP_INLINE_VISIBILITY 1811typename _Cp::const_iterator 1812begin(const _Cp& __c) 1813{ 1814 return __c.begin(); 1815} 1816 1817template <class _Cp> 1818inline _LIBCPP_INLINE_VISIBILITY 1819typename _Cp::iterator 1820end(_Cp& __c) 1821{ 1822 return __c.end(); 1823} 1824 1825template <class _Cp> 1826inline _LIBCPP_INLINE_VISIBILITY 1827typename _Cp::const_iterator 1828end(const _Cp& __c) 1829{ 1830 return __c.end(); 1831} 1832 1833#endif // !defined(_LIBCPP_CXX03_LANG) 1834 1835#if _LIBCPP_STD_VER > 14 1836 1837// #if _LIBCPP_STD_VER > 11 1838// template <> 1839// struct _LIBCPP_TEMPLATE_VIS plus<void> 1840// { 1841// template <class _T1, class _T2> 1842// _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1843// auto operator()(_T1&& __t, _T2&& __u) const 1844// _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 1845// -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 1846// { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 1847// typedef void is_transparent; 1848// }; 1849// #endif 1850 1851template <class _Cont> 1852inline _LIBCPP_INLINE_VISIBILITY 1853constexpr auto size(const _Cont& __c) 1854_NOEXCEPT_(noexcept(__c.size())) 1855-> decltype (__c.size()) 1856{ return __c.size(); } 1857 1858template <class _Tp, size_t _Sz> 1859inline _LIBCPP_INLINE_VISIBILITY 1860constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; } 1861 1862template <class _Cont> 1863_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1864constexpr auto empty(const _Cont& __c) 1865_NOEXCEPT_(noexcept(__c.empty())) 1866-> decltype (__c.empty()) 1867{ return __c.empty(); } 1868 1869template <class _Tp, size_t _Sz> 1870_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1871constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; } 1872 1873template <class _Ep> 1874_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY 1875constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; } 1876 1877template <class _Cont> constexpr 1878inline _LIBCPP_INLINE_VISIBILITY 1879auto data(_Cont& __c) 1880_NOEXCEPT_(noexcept(__c.data())) 1881-> decltype (__c.data()) 1882{ return __c.data(); } 1883 1884template <class _Cont> constexpr 1885inline _LIBCPP_INLINE_VISIBILITY 1886auto data(const _Cont& __c) 1887_NOEXCEPT_(noexcept(__c.data())) 1888-> decltype (__c.data()) 1889{ return __c.data(); } 1890 1891template <class _Tp, size_t _Sz> 1892inline _LIBCPP_INLINE_VISIBILITY 1893constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; } 1894 1895template <class _Ep> 1896inline _LIBCPP_INLINE_VISIBILITY 1897constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); } 1898#endif 1899 1900 1901_LIBCPP_END_NAMESPACE_STD 1902 1903#endif // _LIBCPP_ITERATOR 1904