2 //===-------------------------- iterator ----------------------------------===//
4 // The LLVM Compiler Infrastructure
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
9 //===----------------------------------------------------------------------===//
11 #ifndef _LIBCPP_ITERATOR
12 #define _LIBCPP_ITERATOR
20 template<class Iterator>
21 struct iterator_traits
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;
31 struct iterator_traits<T*>
33 typedef ptrdiff_t difference_type;
37 typedef random_access_iterator_tag iterator_category;
40 template<class Category, class T, class Distance = ptrdiff_t,
41 class Pointer = T*, class Reference = T&>
45 typedef Distance difference_type;
46 typedef Pointer pointer;
47 typedef Reference reference;
48 typedef Category iterator_category;
51 struct input_iterator_tag {};
52 struct output_iterator_tag {};
53 struct forward_iterator_tag : public input_iterator_tag {};
54 struct bidirectional_iterator_tag : public forward_iterator_tag {};
55 struct random_access_iterator_tag : public bidirectional_iterator_tag {};
57 // 27.4.3, iterator operations
58 // extension: second argument not conforming to C++03
59 template <class InputIterator> // constexpr in C++17
60 constexpr void advance(InputIterator& i,
61 typename iterator_traits<InputIterator>::difference_type n);
63 template <class InputIterator> // constexpr in C++17
64 constexpr typename iterator_traits<InputIterator>::difference_type
65 distance(InputIterator first, InputIterator last);
67 template <class InputIterator> // constexpr in C++17
68 constexpr InputIterator next(InputIterator x,
69 typename iterator_traits<InputIterator>::difference_type n = 1);
71 template <class BidirectionalIterator> // constexpr in C++17
72 constexpr BidirectionalIterator prev(BidirectionalIterator x,
73 typename iterator_traits<BidirectionalIterator>::difference_type n = 1);
75 template <class Iterator>
76 class 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>
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;
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;
109 template <class Iterator1, class Iterator2>
110 constexpr bool // constexpr in C++17
111 operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
113 template <class Iterator1, class Iterator2>
114 constexpr bool // constexpr in C++17
115 operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
117 template <class Iterator1, class Iterator2>
118 constexpr bool // constexpr in C++17
119 operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
121 template <class Iterator1, class Iterator2>
122 constexpr bool // constexpr in C++17
123 operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
125 template <class Iterator1, class Iterator2>
126 constexpr bool // constexpr in C++17
127 operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
129 template <class Iterator1, class Iterator2>
130 constexpr bool // constexpr in C++17
131 operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
133 template <class Iterator1, class Iterator2>
135 operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y)
136 -> decltype(__y.base() - __x.base()); // constexpr in C++17
138 template <class Iterator>
139 constexpr reverse_iterator<Iterator>
140 operator+(typename reverse_iterator<Iterator>::difference_type n,
141 const reverse_iterator<Iterator>& x); // constexpr in C++17
143 template <class Iterator>
144 constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17
146 template <class Container>
147 class back_insert_iterator
150 Container* container;
152 typedef Container container_type;
153 typedef void value_type;
154 typedef void difference_type;
155 typedef void reference;
156 typedef void pointer;
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);
165 template <class Container> back_insert_iterator<Container> back_inserter(Container& x);
167 template <class Container>
168 class front_insert_iterator
171 Container* container;
173 typedef Container container_type;
174 typedef void value_type;
175 typedef void difference_type;
176 typedef void reference;
177 typedef void pointer;
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);
186 template <class Container> front_insert_iterator<Container> front_inserter(Container& x);
188 template <class Container>
189 class insert_iterator
192 Container* container;
193 typename Container::iterator iter;
195 typedef Container container_type;
196 typedef void value_type;
197 typedef void difference_type;
198 typedef void reference;
199 typedef void pointer;
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);
208 template <class Container, class Iterator>
209 insert_iterator<Container> inserter(Container& x, Iterator i);
211 template <class Iterator>
212 class move_iterator {
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;
221 constexpr move_iterator(); // all the constexprs are in C++17
222 constexpr explicit move_iterator(Iterator i);
224 constexpr move_iterator(const move_iterator<U>& 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;
240 Iterator current; // exposition only
243 template <class Iterator1, class Iterator2>
244 constexpr bool // constexpr in C++17
245 operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
247 template <class Iterator1, class Iterator2>
248 constexpr bool // constexpr in C++17
249 operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
251 template <class Iterator1, class Iterator2>
252 constexpr bool // constexpr in C++17
253 operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
255 template <class Iterator1, class Iterator2>
256 constexpr bool // constexpr in C++17
257 operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
259 template <class Iterator1, class Iterator2>
260 constexpr bool // constexpr in C++17
261 operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
263 template <class Iterator1, class Iterator2>
264 constexpr bool // constexpr in C++17
265 operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
267 template <class Iterator1, class Iterator2>
268 constexpr auto // constexpr in C++17
269 operator-(const move_iterator<Iterator1>& x,
270 const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base());
272 template <class Iterator>
273 constexpr move_iterator<Iterator> operator+( // constexpr in C++17
274 typename move_iterator<Iterator>::difference_type n,
275 const move_iterator<Iterator>& x);
277 template <class Iterator> // constexpr in C++17
278 constexpr move_iterator<Iterator> make_move_iterator(const Iterator& i);
281 template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t>
282 class istream_iterator
283 : public iterator<input_iterator_tag, T, Distance, const T*, const T&>
286 typedef charT char_type;
287 typedef traits traits_type;
288 typedef basic_istream<charT,traits> istream_type;
290 constexpr istream_iterator();
291 istream_iterator(istream_type& s);
292 istream_iterator(const istream_iterator& x);
295 const T& operator*() const;
296 const T* operator->() const;
297 istream_iterator& operator++();
298 istream_iterator operator++(int);
301 template <class T, class charT, class traits, class Distance>
302 bool operator==(const istream_iterator<T,charT,traits,Distance>& x,
303 const istream_iterator<T,charT,traits,Distance>& y);
304 template <class T, class charT, class traits, class Distance>
305 bool operator!=(const istream_iterator<T,charT,traits,Distance>& x,
306 const istream_iterator<T,charT,traits,Distance>& y);
308 template <class T, class charT = char, class traits = char_traits<charT> >
309 class ostream_iterator
310 : public iterator<output_iterator_tag, void, void, void ,void>
313 typedef charT char_type;
314 typedef traits traits_type;
315 typedef basic_ostream<charT,traits> ostream_type;
317 ostream_iterator(ostream_type& s);
318 ostream_iterator(ostream_type& s, const charT* delimiter);
319 ostream_iterator(const ostream_iterator& x);
321 ostream_iterator& operator=(const T& value);
323 ostream_iterator& operator*();
324 ostream_iterator& operator++();
325 ostream_iterator& operator++(int);
328 template<class charT, class traits = char_traits<charT> >
329 class istreambuf_iterator
330 : public iterator<input_iterator_tag, charT,
331 typename traits::off_type, unspecified,
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;
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;
346 charT operator*() const;
347 pointer operator->() const;
348 istreambuf_iterator& operator++();
349 a-private-type operator++(int);
351 bool equal(const istreambuf_iterator& b) const;
354 template <class charT, class traits>
355 bool operator==(const istreambuf_iterator<charT,traits>& a,
356 const istreambuf_iterator<charT,traits>& b);
357 template <class charT, class traits>
358 bool operator!=(const istreambuf_iterator<charT,traits>& a,
359 const istreambuf_iterator<charT,traits>& b);
361 template <class charT, class traits = char_traits<charT> >
362 class ostreambuf_iterator
363 : public iterator<output_iterator_tag, void, void, void, void>
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;
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;
380 template <class C> constexpr auto begin(C& c) -> decltype(c.begin());
381 template <class C> constexpr auto begin(const C& c) -> decltype(c.begin());
382 template <class C> constexpr auto end(C& c) -> decltype(c.end());
383 template <class C> constexpr auto end(const C& c) -> decltype(c.end());
384 template <class T, size_t N> constexpr T* begin(T (&array)[N]);
385 template <class T, size_t N> constexpr T* end(T (&array)[N]);
387 template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c)); // C++14
388 template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c)); // C++14
389 template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin()); // C++14
390 template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin()); // C++14
391 template <class C> auto constexpr rend(C& c) -> decltype(c.rend()); // C++14
392 template <class C> constexpr auto rend(const C& c) -> decltype(c.rend()); // C++14
393 template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14
394 template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il); // C++14
395 template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]); // C++14
396 template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]); // C++14
397 template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c)); // C++14
398 template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c)); // C++14
400 // 24.8, container access:
401 template <class C> constexpr auto size(const C& c) -> decltype(c.size()); // C++17
402 template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17
403 template <class C> constexpr auto empty(const C& c) -> decltype(c.empty()); // C++17
404 template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept; // C++17
405 template <class E> constexpr bool empty(initializer_list<E> il) noexcept; // C++17
406 template <class C> constexpr auto data(C& c) -> decltype(c.data()); // C++17
407 template <class C> constexpr auto data(const C& c) -> decltype(c.data()); // C++17
408 template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept; // C++17
409 template <class E> constexpr const E* data(initializer_list<E> il) noexcept; // C++17
416 #include <iosfwd> // for forward declarations of vector and string.
417 #include <__functional_base>
418 #include <type_traits>
420 #include <initializer_list>
422 #include <Availability.h>
427 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
428 #pragma GCC system_header
431 _LIBCPP_BEGIN_NAMESPACE_STD
433 struct _LIBCPP_TEMPLATE_VIS input_iterator_tag {};
434 struct _LIBCPP_TEMPLATE_VIS output_iterator_tag {};
435 struct _LIBCPP_TEMPLATE_VIS forward_iterator_tag : public input_iterator_tag {};
436 struct _LIBCPP_TEMPLATE_VIS bidirectional_iterator_tag : public forward_iterator_tag {};
437 struct _LIBCPP_TEMPLATE_VIS random_access_iterator_tag : public bidirectional_iterator_tag {};
440 struct __has_iterator_category
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);
447 static const bool value = sizeof(__test<_Tp>(0)) == 1;
450 template <class _Iter, bool> struct __iterator_traits_impl {};
452 template <class _Iter>
453 struct __iterator_traits_impl<_Iter, true>
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;
462 template <class _Iter, bool> struct __iterator_traits {};
464 template <class _Iter>
465 struct __iterator_traits<_Iter, true>
466 : __iterator_traits_impl
469 is_convertible<typename _Iter::iterator_category, input_iterator_tag>::value ||
470 is_convertible<typename _Iter::iterator_category, output_iterator_tag>::value
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.
479 template <class _Iter>
480 struct _LIBCPP_TEMPLATE_VIS iterator_traits
481 : __iterator_traits<_Iter, __has_iterator_category<_Iter>::value> {};
484 struct _LIBCPP_TEMPLATE_VIS iterator_traits<_Tp*>
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;
493 template <class _Tp, class _Up, bool = __has_iterator_category<iterator_traits<_Tp> >::value>
494 struct __has_iterator_category_convertible_to
495 : public integral_constant<bool, is_convertible<typename iterator_traits<_Tp>::iterator_category, _Up>::value>
498 template <class _Tp, class _Up>
499 struct __has_iterator_category_convertible_to<_Tp, _Up, false> : public false_type {};
502 struct __is_input_iterator : public __has_iterator_category_convertible_to<_Tp, input_iterator_tag> {};
505 struct __is_forward_iterator : public __has_iterator_category_convertible_to<_Tp, forward_iterator_tag> {};
508 struct __is_bidirectional_iterator : public __has_iterator_category_convertible_to<_Tp, bidirectional_iterator_tag> {};
511 struct __is_random_access_iterator : public __has_iterator_category_convertible_to<_Tp, random_access_iterator_tag> {};
514 struct __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> {};
519 template<class _Category, class _Tp, class _Distance = ptrdiff_t,
520 class _Pointer = _Tp*, class _Reference = _Tp&>
521 struct _LIBCPP_TEMPLATE_VIS iterator
523 typedef _Tp value_type;
524 typedef _Distance difference_type;
525 typedef _Pointer pointer;
526 typedef _Reference reference;
527 typedef _Category iterator_category;
530 template <class _InputIter>
531 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
532 void __advance(_InputIter& __i,
533 typename iterator_traits<_InputIter>::difference_type __n, input_iterator_tag)
535 for (; __n > 0; --__n)
539 template <class _BiDirIter>
540 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
541 void __advance(_BiDirIter& __i,
542 typename iterator_traits<_BiDirIter>::difference_type __n, bidirectional_iterator_tag)
545 for (; __n > 0; --__n)
548 for (; __n < 0; ++__n)
552 template <class _RandIter>
553 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
554 void __advance(_RandIter& __i,
555 typename iterator_traits<_RandIter>::difference_type __n, random_access_iterator_tag)
560 template <class _InputIter>
561 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
562 void advance(_InputIter& __i,
563 typename iterator_traits<_InputIter>::difference_type __n)
565 __advance(__i, __n, typename iterator_traits<_InputIter>::iterator_category());
568 template <class _InputIter>
569 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
570 typename iterator_traits<_InputIter>::difference_type
571 __distance(_InputIter __first, _InputIter __last, input_iterator_tag)
573 typename iterator_traits<_InputIter>::difference_type __r(0);
574 for (; __first != __last; ++__first)
579 template <class _RandIter>
580 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
581 typename iterator_traits<_RandIter>::difference_type
582 __distance(_RandIter __first, _RandIter __last, random_access_iterator_tag)
584 return __last - __first;
587 template <class _InputIter>
588 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
589 typename iterator_traits<_InputIter>::difference_type
590 distance(_InputIter __first, _InputIter __last)
592 return __distance(__first, __last, typename iterator_traits<_InputIter>::iterator_category());
595 template <class _InputIter>
596 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
599 __is_input_iterator<_InputIter>::value,
603 typename iterator_traits<_InputIter>::difference_type __n = 1)
605 _VSTD::advance(__x, __n);
609 template <class _BidirectionalIter>
610 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
613 __is_bidirectional_iterator<_BidirectionalIter>::value,
616 prev(_BidirectionalIter __x,
617 typename iterator_traits<_BidirectionalIter>::difference_type __n = 1)
619 _VSTD::advance(__x, -__n);
624 template <class _Tp, class = void>
625 struct __is_stashing_iterator : false_type {};
628 struct __is_stashing_iterator<_Tp, typename __void_t<typename _Tp::__stashing_iterator_tag>::type>
631 template <class _Iter>
632 class _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>
640 /*mutable*/ _Iter __t; // no longer used as of LWG #2360, not removed due to ABI break
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");
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;
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) {}
659 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
660 reverse_iterator(const reverse_iterator<_Up>& __u) : __t(__u.base()), current(__u.base()) {}
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);}
691 template <class _Iter1, class _Iter2>
692 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
694 operator==(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
696 return __x.base() == __y.base();
699 template <class _Iter1, class _Iter2>
700 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
702 operator<(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
704 return __x.base() > __y.base();
707 template <class _Iter1, class _Iter2>
708 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
710 operator!=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
712 return __x.base() != __y.base();
715 template <class _Iter1, class _Iter2>
716 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
718 operator>(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
720 return __x.base() < __y.base();
723 template <class _Iter1, class _Iter2>
724 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
726 operator>=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
728 return __x.base() <= __y.base();
731 template <class _Iter1, class _Iter2>
732 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
734 operator<=(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
736 return __x.base() >= __y.base();
739 #ifndef _LIBCPP_CXX03_LANG
740 template <class _Iter1, class _Iter2>
741 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
743 operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
744 -> decltype(__y.base() - __x.base())
746 return __y.base() - __x.base();
749 template <class _Iter1, class _Iter2>
750 inline _LIBCPP_INLINE_VISIBILITY
751 typename reverse_iterator<_Iter1>::difference_type
752 operator-(const reverse_iterator<_Iter1>& __x, const reverse_iterator<_Iter2>& __y)
754 return __y.base() - __x.base();
758 template <class _Iter>
759 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
760 reverse_iterator<_Iter>
761 operator+(typename reverse_iterator<_Iter>::difference_type __n, const reverse_iterator<_Iter>& __x)
763 return reverse_iterator<_Iter>(__x.base() - __n);
766 #if _LIBCPP_STD_VER > 11
767 template <class _Iter>
768 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
769 reverse_iterator<_Iter> make_reverse_iterator(_Iter __i)
771 return reverse_iterator<_Iter>(__i);
775 template <class _Container>
776 class _LIBCPP_TEMPLATE_VIS back_insert_iterator
777 : public iterator<output_iterator_tag,
784 _Container* container;
786 typedef _Container container_type;
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;}
800 template <class _Container>
801 inline _LIBCPP_INLINE_VISIBILITY
802 back_insert_iterator<_Container>
803 back_inserter(_Container& __x)
805 return back_insert_iterator<_Container>(__x);
808 template <class _Container>
809 class _LIBCPP_TEMPLATE_VIS front_insert_iterator
810 : public iterator<output_iterator_tag,
817 _Container* container;
819 typedef _Container container_type;
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;}
833 template <class _Container>
834 inline _LIBCPP_INLINE_VISIBILITY
835 front_insert_iterator<_Container>
836 front_inserter(_Container& __x)
838 return front_insert_iterator<_Container>(__x);
841 template <class _Container>
842 class _LIBCPP_TEMPLATE_VIS insert_iterator
843 : public iterator<output_iterator_tag,
850 _Container* container;
851 typename _Container::iterator iter;
853 typedef _Container container_type;
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;}
868 template <class _Container>
869 inline _LIBCPP_INLINE_VISIBILITY
870 insert_iterator<_Container>
871 inserter(_Container& __x, typename _Container::iterator __i)
873 return insert_iterator<_Container>(__x, __i);
876 template <class _Tp, class _CharT = char,
877 class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t>
878 class _LIBCPP_TEMPLATE_VIS istream_iterator
879 : public iterator<input_iterator_tag, _Tp, _Distance, const _Tp*, const _Tp&>
882 typedef _CharT char_type;
883 typedef _Traits traits_type;
884 typedef basic_istream<_CharT,_Traits> istream_type;
886 istream_type* __in_stream_;
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))
892 if (!(*__in_stream_ >> __value_))
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++()
900 if (!(*__in_stream_ >> __value_))
904 _LIBCPP_INLINE_VISIBILITY istream_iterator operator++(int)
905 {istream_iterator __t(*this); ++(*this); return __t;}
907 template <class _Up, class _CharU, class _TraitsU, class _DistanceU>
908 friend _LIBCPP_INLINE_VISIBILITY
910 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x,
911 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y);
913 template <class _Up, class _CharU, class _TraitsU, class _DistanceU>
914 friend _LIBCPP_INLINE_VISIBILITY
916 operator==(const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __x,
917 const istream_iterator<_Up, _CharU, _TraitsU, _DistanceU>& __y);
920 template <class _Tp, class _CharT, class _Traits, class _Distance>
921 inline _LIBCPP_INLINE_VISIBILITY
923 operator==(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x,
924 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y)
926 return __x.__in_stream_ == __y.__in_stream_;
929 template <class _Tp, class _CharT, class _Traits, class _Distance>
930 inline _LIBCPP_INLINE_VISIBILITY
932 operator!=(const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __x,
933 const istream_iterator<_Tp, _CharT, _Traits, _Distance>& __y)
935 return !(__x == __y);
938 template <class _Tp, class _CharT = char, class _Traits = char_traits<_CharT> >
939 class _LIBCPP_TEMPLATE_VIS ostream_iterator
940 : public iterator<output_iterator_tag, void, void, void, void>
943 typedef _CharT char_type;
944 typedef _Traits traits_type;
945 typedef basic_ostream<_CharT,_Traits> ostream_type;
947 ostream_type* __out_stream_;
948 const char_type* __delim_;
950 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s) _NOEXCEPT
951 : __out_stream_(_VSTD::addressof(__s)), __delim_(0) {}
952 _LIBCPP_INLINE_VISIBILITY ostream_iterator(ostream_type& __s, const _CharT* __delimiter) _NOEXCEPT
953 : __out_stream_(_VSTD::addressof(__s)), __delim_(__delimiter) {}
954 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator=(const _Tp& __value_)
956 *__out_stream_ << __value_;
958 *__out_stream_ << __delim_;
962 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator*() {return *this;}
963 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++() {return *this;}
964 _LIBCPP_INLINE_VISIBILITY ostream_iterator& operator++(int) {return *this;}
967 template<class _CharT, class _Traits>
968 class _LIBCPP_TEMPLATE_VIS istreambuf_iterator
969 : public iterator<input_iterator_tag, _CharT,
970 typename _Traits::off_type, _CharT*,
974 typedef _CharT char_type;
975 typedef _Traits traits_type;
976 typedef typename _Traits::int_type int_type;
977 typedef basic_streambuf<_CharT,_Traits> streambuf_type;
978 typedef basic_istream<_CharT,_Traits> istream_type;
980 mutable streambuf_type* __sbuf_;
985 streambuf_type* __sbuf_;
986 _LIBCPP_INLINE_VISIBILITY __proxy(char_type __c, streambuf_type* __s)
987 : __keep_(__c), __sbuf_(__s) {}
988 friend class istreambuf_iterator;
990 _LIBCPP_INLINE_VISIBILITY char_type operator*() const {return __keep_;}
993 _LIBCPP_INLINE_VISIBILITY
994 bool __test_for_eof() const
996 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sgetc(), traits_type::eof()))
1001 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR istreambuf_iterator() _NOEXCEPT : __sbuf_(0) {}
1002 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(istream_type& __s) _NOEXCEPT
1003 : __sbuf_(__s.rdbuf()) {}
1004 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(streambuf_type* __s) _NOEXCEPT
1006 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator(const __proxy& __p) _NOEXCEPT
1007 : __sbuf_(__p.__sbuf_) {}
1009 _LIBCPP_INLINE_VISIBILITY char_type operator*() const
1010 {return static_cast<char_type>(__sbuf_->sgetc());}
1011 _LIBCPP_INLINE_VISIBILITY istreambuf_iterator& operator++()
1016 _LIBCPP_INLINE_VISIBILITY __proxy operator++(int)
1018 return __proxy(__sbuf_->sbumpc(), __sbuf_);
1021 _LIBCPP_INLINE_VISIBILITY bool equal(const istreambuf_iterator& __b) const
1022 {return __test_for_eof() == __b.__test_for_eof();}
1025 template <class _CharT, class _Traits>
1026 inline _LIBCPP_INLINE_VISIBILITY
1027 bool operator==(const istreambuf_iterator<_CharT,_Traits>& __a,
1028 const istreambuf_iterator<_CharT,_Traits>& __b)
1029 {return __a.equal(__b);}
1031 template <class _CharT, class _Traits>
1032 inline _LIBCPP_INLINE_VISIBILITY
1033 bool operator!=(const istreambuf_iterator<_CharT,_Traits>& __a,
1034 const istreambuf_iterator<_CharT,_Traits>& __b)
1035 {return !__a.equal(__b);}
1037 template <class _CharT, class _Traits>
1038 class _LIBCPP_TEMPLATE_VIS ostreambuf_iterator
1039 : public iterator<output_iterator_tag, void, void, void, void>
1042 typedef _CharT char_type;
1043 typedef _Traits traits_type;
1044 typedef basic_streambuf<_CharT,_Traits> streambuf_type;
1045 typedef basic_ostream<_CharT,_Traits> ostream_type;
1047 streambuf_type* __sbuf_;
1049 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(ostream_type& __s) _NOEXCEPT
1050 : __sbuf_(__s.rdbuf()) {}
1051 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator(streambuf_type* __s) _NOEXCEPT
1053 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator=(_CharT __c)
1055 if (__sbuf_ && traits_type::eq_int_type(__sbuf_->sputc(__c), traits_type::eof()))
1059 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator*() {return *this;}
1060 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++() {return *this;}
1061 _LIBCPP_INLINE_VISIBILITY ostreambuf_iterator& operator++(int) {return *this;}
1062 _LIBCPP_INLINE_VISIBILITY bool failed() const _NOEXCEPT {return __sbuf_ == 0;}
1064 #if !defined(__APPLE__) || \
1065 (defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_8) || \
1066 (defined(__IPHONE_OS_VERSION_MIN_REQUIRED) && __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_6_0)
1068 template <class _Ch, class _Tr>
1071 ostreambuf_iterator<_Ch, _Tr>
1072 __pad_and_output(ostreambuf_iterator<_Ch, _Tr> __s,
1073 const _Ch* __ob, const _Ch* __op, const _Ch* __oe,
1074 ios_base& __iob, _Ch __fl);
1078 template <class _Iter>
1079 class _LIBCPP_TEMPLATE_VIS move_iterator
1084 typedef _Iter iterator_type;
1085 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category;
1086 typedef typename iterator_traits<iterator_type>::value_type value_type;
1087 typedef typename iterator_traits<iterator_type>::difference_type difference_type;
1088 typedef iterator_type pointer;
1089 #ifndef _LIBCPP_CXX03_LANG
1090 typedef typename iterator_traits<iterator_type>::reference __reference;
1091 typedef typename conditional<
1092 is_reference<__reference>::value,
1093 typename remove_reference<__reference>::type&&,
1097 typedef typename iterator_traits<iterator_type>::reference reference;
1100 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1101 move_iterator() : __i() {}
1102 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1103 explicit move_iterator(_Iter __x) : __i(__x) {}
1104 template <class _Up>
1105 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1106 move_iterator(const move_iterator<_Up>& __u) : __i(__u.base()) {}
1107 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14 _Iter base() const {return __i;}
1108 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1109 reference operator*() const { return static_cast<reference>(*__i); }
1110 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1111 pointer operator->() const { return __i;}
1112 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1113 move_iterator& operator++() {++__i; return *this;}
1114 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1115 move_iterator operator++(int) {move_iterator __tmp(*this); ++__i; return __tmp;}
1116 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1117 move_iterator& operator--() {--__i; return *this;}
1118 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1119 move_iterator operator--(int) {move_iterator __tmp(*this); --__i; return __tmp;}
1120 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1121 move_iterator operator+ (difference_type __n) const {return move_iterator(__i + __n);}
1122 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1123 move_iterator& operator+=(difference_type __n) {__i += __n; return *this;}
1124 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1125 move_iterator operator- (difference_type __n) const {return move_iterator(__i - __n);}
1126 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1127 move_iterator& operator-=(difference_type __n) {__i -= __n; return *this;}
1128 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1129 reference operator[](difference_type __n) const { return static_cast<reference>(__i[__n]); }
1132 template <class _Iter1, class _Iter2>
1133 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1135 operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
1137 return __x.base() == __y.base();
1140 template <class _Iter1, class _Iter2>
1141 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1143 operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
1145 return __x.base() < __y.base();
1148 template <class _Iter1, class _Iter2>
1149 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1151 operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
1153 return __x.base() != __y.base();
1156 template <class _Iter1, class _Iter2>
1157 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1159 operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
1161 return __x.base() > __y.base();
1164 template <class _Iter1, class _Iter2>
1165 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1167 operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
1169 return __x.base() >= __y.base();
1172 template <class _Iter1, class _Iter2>
1173 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1175 operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
1177 return __x.base() <= __y.base();
1180 #ifndef _LIBCPP_CXX03_LANG
1181 template <class _Iter1, class _Iter2>
1182 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1184 operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
1185 -> decltype(__x.base() - __y.base())
1187 return __x.base() - __y.base();
1190 template <class _Iter1, class _Iter2>
1191 inline _LIBCPP_INLINE_VISIBILITY
1192 typename move_iterator<_Iter1>::difference_type
1193 operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y)
1195 return __x.base() - __y.base();
1199 template <class _Iter>
1200 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1201 move_iterator<_Iter>
1202 operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x)
1204 return move_iterator<_Iter>(__x.base() + __n);
1207 template <class _Iter>
1208 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1209 move_iterator<_Iter>
1210 make_move_iterator(_Iter __i)
1212 return move_iterator<_Iter>(__i);
1217 template <class _Iter> class __wrap_iter;
1219 template <class _Iter1, class _Iter2>
1220 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1222 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1224 template <class _Iter1, class _Iter2>
1225 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1227 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1229 template <class _Iter1, class _Iter2>
1230 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1232 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1234 template <class _Iter1, class _Iter2>
1235 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1237 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1239 template <class _Iter1, class _Iter2>
1240 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1242 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1244 template <class _Iter1, class _Iter2>
1245 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1247 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1249 #ifndef _LIBCPP_CXX03_LANG
1250 template <class _Iter1, class _Iter2>
1251 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1253 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1254 -> decltype(__x.base() - __y.base());
1256 template <class _Iter1, class _Iter2>
1257 _LIBCPP_INLINE_VISIBILITY
1258 typename __wrap_iter<_Iter1>::difference_type
1259 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1262 template <class _Iter>
1263 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1265 operator+(typename __wrap_iter<_Iter>::difference_type, __wrap_iter<_Iter>) _NOEXCEPT_DEBUG;
1267 template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY copy(_Ip, _Ip, _Op);
1268 template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY copy_backward(_B1, _B1, _B2);
1269 template <class _Ip, class _Op> _Op _LIBCPP_INLINE_VISIBILITY move(_Ip, _Ip, _Op);
1270 template <class _B1, class _B2> _B2 _LIBCPP_INLINE_VISIBILITY move_backward(_B1, _B1, _B2);
1272 #if _LIBCPP_DEBUG_LEVEL < 2
1274 template <class _Tp>
1275 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1278 is_trivially_copy_assignable<_Tp>::value,
1281 __unwrap_iter(__wrap_iter<_Tp*>);
1285 template <class _Tp>
1286 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1289 is_trivially_copy_assignable<_Tp>::value,
1292 __unwrap_iter(__wrap_iter<_Tp*> __i);
1296 template <class _Iter>
1300 typedef _Iter iterator_type;
1301 typedef typename iterator_traits<iterator_type>::iterator_category iterator_category;
1302 typedef typename iterator_traits<iterator_type>::value_type value_type;
1303 typedef typename iterator_traits<iterator_type>::difference_type difference_type;
1304 typedef typename iterator_traits<iterator_type>::pointer pointer;
1305 typedef typename iterator_traits<iterator_type>::reference reference;
1309 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter() _NOEXCEPT_DEBUG
1310 #if _LIBCPP_STD_VER > 11
1314 #if _LIBCPP_DEBUG_LEVEL >= 2
1315 __get_db()->__insert_i(this);
1318 template <class _Up> _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1319 __wrap_iter(const __wrap_iter<_Up>& __u,
1320 typename enable_if<is_convertible<_Up, iterator_type>::value>::type* = 0) _NOEXCEPT_DEBUG
1323 #if _LIBCPP_DEBUG_LEVEL >= 2
1324 __get_db()->__iterator_copy(this, &__u);
1327 #if _LIBCPP_DEBUG_LEVEL >= 2
1328 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1329 __wrap_iter(const __wrap_iter& __x)
1332 __get_db()->__iterator_copy(this, &__x);
1334 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1335 __wrap_iter& operator=(const __wrap_iter& __x)
1339 __get_db()->__iterator_copy(this, &__x);
1344 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1347 __get_db()->__erase_i(this);
1350 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator*() const _NOEXCEPT_DEBUG
1352 #if _LIBCPP_DEBUG_LEVEL >= 2
1353 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
1354 "Attempted to dereference a non-dereferenceable iterator");
1358 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG pointer operator->() const _NOEXCEPT_DEBUG
1360 #if _LIBCPP_DEBUG_LEVEL >= 2
1361 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
1362 "Attempted to dereference a non-dereferenceable iterator");
1364 return (pointer)_VSTD::addressof(*__i);
1366 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator++() _NOEXCEPT_DEBUG
1368 #if _LIBCPP_DEBUG_LEVEL >= 2
1369 _LIBCPP_ASSERT(__get_const_db()->__dereferenceable(this),
1370 "Attempted to increment non-incrementable iterator");
1375 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator++(int) _NOEXCEPT_DEBUG
1376 {__wrap_iter __tmp(*this); ++(*this); return __tmp;}
1378 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator--() _NOEXCEPT_DEBUG
1380 #if _LIBCPP_DEBUG_LEVEL >= 2
1381 _LIBCPP_ASSERT(__get_const_db()->__decrementable(this),
1382 "Attempted to decrement non-decrementable iterator");
1387 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator--(int) _NOEXCEPT_DEBUG
1388 {__wrap_iter __tmp(*this); --(*this); return __tmp;}
1389 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator+ (difference_type __n) const _NOEXCEPT_DEBUG
1390 {__wrap_iter __w(*this); __w += __n; return __w;}
1391 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator+=(difference_type __n) _NOEXCEPT_DEBUG
1393 #if _LIBCPP_DEBUG_LEVEL >= 2
1394 _LIBCPP_ASSERT(__get_const_db()->__addable(this, __n),
1395 "Attempted to add/subtract iterator outside of valid range");
1400 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter operator- (difference_type __n) const _NOEXCEPT_DEBUG
1401 {return *this + (-__n);}
1402 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter& operator-=(difference_type __n) _NOEXCEPT_DEBUG
1403 {*this += -__n; return *this;}
1404 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG reference operator[](difference_type __n) const _NOEXCEPT_DEBUG
1406 #if _LIBCPP_DEBUG_LEVEL >= 2
1407 _LIBCPP_ASSERT(__get_const_db()->__subscriptable(this, __n),
1408 "Attempted to subscript iterator outside of valid range");
1413 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG iterator_type base() const _NOEXCEPT_DEBUG {return __i;}
1416 #if _LIBCPP_DEBUG_LEVEL >= 2
1417 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(const void* __p, iterator_type __x) : __i(__x)
1419 __get_db()->__insert_ic(this, __p);
1422 _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG __wrap_iter(iterator_type __x) _NOEXCEPT_DEBUG : __i(__x) {}
1425 template <class _Up> friend class __wrap_iter;
1426 template <class _CharT, class _Traits, class _Alloc> friend class basic_string;
1427 template <class _Tp, class _Alloc> friend class _LIBCPP_TEMPLATE_VIS vector;
1428 template <class _Tp, ptrdiff_t> friend class _LIBCPP_TEMPLATE_VIS span;
1430 template <class _Iter1, class _Iter2>
1431 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1433 operator==(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1435 template <class _Iter1, class _Iter2>
1436 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1438 operator<(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1440 template <class _Iter1, class _Iter2>
1441 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1443 operator!=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1445 template <class _Iter1, class _Iter2>
1446 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1448 operator>(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1450 template <class _Iter1, class _Iter2>
1451 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1453 operator>=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1455 template <class _Iter1, class _Iter2>
1456 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1458 operator<=(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1460 #ifndef _LIBCPP_CXX03_LANG
1461 template <class _Iter1, class _Iter2>
1462 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1464 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1465 -> decltype(__x.base() - __y.base());
1467 template <class _Iter1, class _Iter2>
1468 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1469 typename __wrap_iter<_Iter1>::difference_type
1470 operator-(const __wrap_iter<_Iter1>&, const __wrap_iter<_Iter2>&) _NOEXCEPT_DEBUG;
1473 template <class _Iter1>
1474 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1476 operator+(typename __wrap_iter<_Iter1>::difference_type, __wrap_iter<_Iter1>) _NOEXCEPT_DEBUG;
1478 template <class _Ip, class _Op> friend _Op copy(_Ip, _Ip, _Op);
1479 template <class _B1, class _B2> friend _B2 copy_backward(_B1, _B1, _B2);
1480 template <class _Ip, class _Op> friend _Op move(_Ip, _Ip, _Op);
1481 template <class _B1, class _B2> friend _B2 move_backward(_B1, _B1, _B2);
1483 #if _LIBCPP_DEBUG_LEVEL < 2
1484 template <class _Tp>
1485 _LIBCPP_CONSTEXPR_IF_NODEBUG friend
1488 is_trivially_copy_assignable<_Tp>::value,
1491 __unwrap_iter(__wrap_iter<_Tp*>);
1493 template <class _Tp>
1494 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1497 is_trivially_copy_assignable<_Tp>::value,
1500 __unwrap_iter(__wrap_iter<_Tp*> __i);
1504 template <class _Iter1, class _Iter2>
1505 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1507 operator==(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1509 return __x.base() == __y.base();
1512 template <class _Iter1, class _Iter2>
1513 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1515 operator<(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1517 #if _LIBCPP_DEBUG_LEVEL >= 2
1518 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y),
1519 "Attempted to compare incomparable iterators");
1521 return __x.base() < __y.base();
1524 template <class _Iter1, class _Iter2>
1525 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1527 operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1529 return !(__x == __y);
1532 template <class _Iter1, class _Iter2>
1533 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1535 operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1540 template <class _Iter1, class _Iter2>
1541 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1543 operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1545 return !(__x < __y);
1548 template <class _Iter1, class _Iter2>
1549 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1551 operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1553 return !(__y < __x);
1556 template <class _Iter1>
1557 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1559 operator!=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG
1561 return !(__x == __y);
1564 template <class _Iter1>
1565 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1567 operator>(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG
1572 template <class _Iter1>
1573 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1575 operator>=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG
1577 return !(__x < __y);
1580 template <class _Iter1>
1581 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1583 operator<=(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter1>& __y) _NOEXCEPT_DEBUG
1585 return !(__y < __x);
1588 #ifndef _LIBCPP_CXX03_LANG
1589 template <class _Iter1, class _Iter2>
1590 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1592 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1593 -> decltype(__x.base() - __y.base())
1595 #if _LIBCPP_DEBUG_LEVEL >= 2
1596 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y),
1597 "Attempted to subtract incompatible iterators");
1599 return __x.base() - __y.base();
1602 template <class _Iter1, class _Iter2>
1603 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1604 typename __wrap_iter<_Iter1>::difference_type
1605 operator-(const __wrap_iter<_Iter1>& __x, const __wrap_iter<_Iter2>& __y) _NOEXCEPT_DEBUG
1607 #if _LIBCPP_DEBUG_LEVEL >= 2
1608 _LIBCPP_ASSERT(__get_const_db()->__less_than_comparable(&__x, &__y),
1609 "Attempted to subtract incompatible iterators");
1611 return __x.base() - __y.base();
1615 template <class _Iter>
1616 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_IF_NODEBUG
1618 operator+(typename __wrap_iter<_Iter>::difference_type __n,
1619 __wrap_iter<_Iter> __x) _NOEXCEPT_DEBUG
1625 template <class _Iter>
1626 struct __libcpp_is_trivial_iterator
1627 : public _LIBCPP_BOOL_CONSTANT(is_pointer<_Iter>::value) {};
1629 template <class _Iter>
1630 struct __libcpp_is_trivial_iterator<move_iterator<_Iter> >
1631 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {};
1633 template <class _Iter>
1634 struct __libcpp_is_trivial_iterator<reverse_iterator<_Iter> >
1635 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {};
1637 template <class _Iter>
1638 struct __libcpp_is_trivial_iterator<__wrap_iter<_Iter> >
1639 : public _LIBCPP_BOOL_CONSTANT(__libcpp_is_trivial_iterator<_Iter>::value) {};
1642 template <class _Tp, size_t _Np>
1643 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1645 begin(_Tp (&__array)[_Np])
1650 template <class _Tp, size_t _Np>
1651 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1653 end(_Tp (&__array)[_Np])
1655 return __array + _Np;
1658 #if !defined(_LIBCPP_CXX03_LANG)
1660 template <class _Cp>
1661 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1663 begin(_Cp& __c) -> decltype(__c.begin())
1668 template <class _Cp>
1669 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1671 begin(const _Cp& __c) -> decltype(__c.begin())
1676 template <class _Cp>
1677 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1679 end(_Cp& __c) -> decltype(__c.end())
1684 template <class _Cp>
1685 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1687 end(const _Cp& __c) -> decltype(__c.end())
1692 #if _LIBCPP_STD_VER > 11
1694 template <class _Tp, size_t _Np>
1695 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1696 reverse_iterator<_Tp*> rbegin(_Tp (&__array)[_Np])
1698 return reverse_iterator<_Tp*>(__array + _Np);
1701 template <class _Tp, size_t _Np>
1702 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1703 reverse_iterator<_Tp*> rend(_Tp (&__array)[_Np])
1705 return reverse_iterator<_Tp*>(__array);
1708 template <class _Ep>
1709 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1710 reverse_iterator<const _Ep*> rbegin(initializer_list<_Ep> __il)
1712 return reverse_iterator<const _Ep*>(__il.end());
1715 template <class _Ep>
1716 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1717 reverse_iterator<const _Ep*> rend(initializer_list<_Ep> __il)
1719 return reverse_iterator<const _Ep*>(__il.begin());
1722 template <class _Cp>
1723 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1724 auto cbegin(const _Cp& __c) -> decltype(_VSTD::begin(__c))
1726 return _VSTD::begin(__c);
1729 template <class _Cp>
1730 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX11
1731 auto cend(const _Cp& __c) -> decltype(_VSTD::end(__c))
1733 return _VSTD::end(__c);
1736 template <class _Cp>
1737 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1738 auto rbegin(_Cp& __c) -> decltype(__c.rbegin())
1740 return __c.rbegin();
1743 template <class _Cp>
1744 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1745 auto rbegin(const _Cp& __c) -> decltype(__c.rbegin())
1747 return __c.rbegin();
1750 template <class _Cp>
1751 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1752 auto rend(_Cp& __c) -> decltype(__c.rend())
1757 template <class _Cp>
1758 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1759 auto rend(const _Cp& __c) -> decltype(__c.rend())
1764 template <class _Cp>
1765 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1766 auto crbegin(const _Cp& __c) -> decltype(_VSTD::rbegin(__c))
1768 return _VSTD::rbegin(__c);
1771 template <class _Cp>
1772 inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
1773 auto crend(const _Cp& __c) -> decltype(_VSTD::rend(__c))
1775 return _VSTD::rend(__c);
1781 #else // defined(_LIBCPP_CXX03_LANG)
1783 template <class _Cp>
1784 inline _LIBCPP_INLINE_VISIBILITY
1785 typename _Cp::iterator
1791 template <class _Cp>
1792 inline _LIBCPP_INLINE_VISIBILITY
1793 typename _Cp::const_iterator
1794 begin(const _Cp& __c)
1799 template <class _Cp>
1800 inline _LIBCPP_INLINE_VISIBILITY
1801 typename _Cp::iterator
1807 template <class _Cp>
1808 inline _LIBCPP_INLINE_VISIBILITY
1809 typename _Cp::const_iterator
1815 #endif // !defined(_LIBCPP_CXX03_LANG)
1817 #if _LIBCPP_STD_VER > 14
1819 // #if _LIBCPP_STD_VER > 11
1821 // struct _LIBCPP_TEMPLATE_VIS plus<void>
1823 // template <class _T1, class _T2>
1824 // _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY
1825 // auto operator()(_T1&& __t, _T2&& __u) const
1826 // _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)))
1827 // -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))
1828 // { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); }
1829 // typedef void is_transparent;
1833 template <class _Cont>
1834 inline _LIBCPP_INLINE_VISIBILITY
1835 constexpr auto size(const _Cont& __c)
1836 _NOEXCEPT_(noexcept(__c.size()))
1837 -> decltype (__c.size())
1838 { return __c.size(); }
1840 template <class _Tp, size_t _Sz>
1841 inline _LIBCPP_INLINE_VISIBILITY
1842 constexpr size_t size(const _Tp (&)[_Sz]) noexcept { return _Sz; }
1844 template <class _Cont>
1845 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY
1846 constexpr auto empty(const _Cont& __c)
1847 _NOEXCEPT_(noexcept(__c.empty()))
1848 -> decltype (__c.empty())
1849 { return __c.empty(); }
1851 template <class _Tp, size_t _Sz>
1852 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY
1853 constexpr bool empty(const _Tp (&)[_Sz]) noexcept { return false; }
1855 template <class _Ep>
1856 _LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_INLINE_VISIBILITY
1857 constexpr bool empty(initializer_list<_Ep> __il) noexcept { return __il.size() == 0; }
1859 template <class _Cont> constexpr
1860 inline _LIBCPP_INLINE_VISIBILITY
1861 auto data(_Cont& __c)
1862 _NOEXCEPT_(noexcept(__c.data()))
1863 -> decltype (__c.data())
1864 { return __c.data(); }
1866 template <class _Cont> constexpr
1867 inline _LIBCPP_INLINE_VISIBILITY
1868 auto data(const _Cont& __c)
1869 _NOEXCEPT_(noexcept(__c.data()))
1870 -> decltype (__c.data())
1871 { return __c.data(); }
1873 template <class _Tp, size_t _Sz>
1874 inline _LIBCPP_INLINE_VISIBILITY
1875 constexpr _Tp* data(_Tp (&__array)[_Sz]) noexcept { return __array; }
1877 template <class _Ep>
1878 inline _LIBCPP_INLINE_VISIBILITY
1879 constexpr const _Ep* data(initializer_list<_Ep> __il) noexcept { return __il.begin(); }
1883 _LIBCPP_END_NAMESPACE_STD
1885 #endif // _LIBCPP_ITERATOR