1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP_ITERATOR
11#define _LIBCPP_ITERATOR
12
13/*
14    iterator synopsis
15
16#include <concepts>
17
18namespace std
19{
20template<class> struct incrementable_traits;       // since C++20
21template<class T>
22  using iter_difference_t = see below;             // since C++20
23
24template<class> struct indirectly_readable_traits; // since C++20
25template<class T>
26  using iter_value_t = see below;                  // since C++20
27
28template<class Iterator>
29struct iterator_traits;
30
31template<class T>
32  requires is_object_v<T>                    // since C++20
33struct iterator_traits<T*>;
34
35template<dereferenceable T>
36  using iter_reference_t = decltype(*declval<T&>());
37
38namespace ranges::inline unspecified {
39    inline constexpr unspecified iter_move = unspecified; // since C++20, nodiscard as an extension
40}}
41
42template<dereferenceable T>
43  requires ...
44using iter_rvalue_reference_t = decltype(ranges::iter_move(declval<T&>())); // since C++20
45
46// [iterator.concepts], iterator concepts
47// [iterator.concept.readable], concept indirectly_readable
48template<class In>
49  concept indirectly_readable = see below;                      // since C++20
50
51template<indirectly_readable T>
52  using iter_common_reference_t =
53    common_reference_t<iter_reference_t<T>, iter_value_t<T>&>;  // since C++20
54
55// [iterator.concept.writable], concept indirectly_writable
56template<class Out, class T>
57  concept indirectly_writable = see below;                // since C++20
58
59// [iterator.concept.winc], concept weakly_incrementable
60template<class I>
61  concept weakly_incrementable = see below;                // since C++20
62
63// [iterator.concept.inc], concept incrementable
64template<class I>
65  concept incrementable = see below;                       // since C++20
66
67// [iterator.concept.iterator], concept input_or_output_iterator
68  template<class I>
69    concept input_or_output_iterator = see below;          // since C++20
70
71// [iterator.concept.sentinel], concept sentinel_for
72template<class S, class I>
73  concept sentinel_for = see below;                        // since C++20
74
75// [iterator.concept.sizedsentinel], concept sized_sentinel_for
76template<class S, class I>
77  inline constexpr bool disable_sized_sentinel_for = false;
78
79template<class S, class I>
80  concept sized_sentinel_for = see below;
81
82// [iterator.concept.input], concept input_iterator
83template<class I>
84  concept input_iterator = see below;                      // since C++20
85
86// [iterator.concept.output], concept output_iterator
87template<class I, class T>
88  concept output_iterator = see below;                     // since C++20
89
90// [iterator.concept.forward], concept forward_iterator
91template<class I>
92  concept forward_iterator = see below;                    // since C++20
93
94// [iterator.concept.bidir], concept bidirectional_iterator
95template<class I>
96  concept bidirectional_iterator = see below;              // since C++20
97
98// [iterator.concept.random.access], concept random_access_iterator
99template<class I>
100  concept random_access_iterator = see below;              // since C++20
101
102// [indirectcallable]
103// [indirectcallable.indirectinvocable]
104template<class F, class I>
105  concept indirectly_unary_invocable = see below;          // since C++20
106
107template<class F, class I>
108  concept indirectly_regular_unary_invocable = see below;  // since C++20
109
110template<class F, class I>
111  concept indirect_unary_predicate = see below;            // since C++20
112
113template<class F, class I1, class I2>
114  concept indirect_binary_predicate = see below;           // since C++20
115
116template<class F, class I1, class I2 = I1>
117  concept indirect_equivalence_relation = see below;       // since C++20
118
119template<class F, class I1, class I2 = I1>
120  concept indirect_strict_weak_order = see below;          // since C++20
121
122template<class F, class... Is>
123  using indirect_result_t = see below;                     // since C++20
124
125// [projected], projected
126template<indirectly_readable I, indirectly_regular_unary_invocable<I> Proj>
127  struct projected;                                        // since C++20
128
129template<weakly_incrementable I, indirectly_regular_unary_invocable<I> Proj>
130  struct incrementable_traits<projected<I, Proj>>;         // since C++20
131
132// [alg.req.ind.move], concept indirectly_movable
133template<class In, class Out>
134  concept indirectly_movable = see below;                  // since C++20
135
136template<class In, class Out>
137  concept indirectly_movable_storable = see below;         // since C++20
138
139// [alg.req.ind.swap], concept indirectly_swappable
140template<class I1, class I2 = I1>
141  concept indirectly_swappable = see below;                // since C++20
142
143template<class I1, class I2, class R, class P1 = identity,
144         class P2 = identity>
145  concept indirectly_comparable =
146    indirect_binary_predicate<R, projected<I1, P1>, projected<I2, P2>>; // since C++20
147
148template<input_or_output_iterator I, sentinel_for<I> S>
149  requires (!same_as<I, S> && copyable<I>)
150class common_iterator;                                     // since C++20
151
152template<class Category, class T, class Distance = ptrdiff_t,
153         class Pointer = T*, class Reference = T&>
154struct iterator                                            // deprecated in C++17
155{
156    typedef T         value_type;
157    typedef Distance  difference_type;
158    typedef Pointer   pointer;
159    typedef Reference reference;
160    typedef Category  iterator_category;
161};
162
163struct input_iterator_tag  {};
164struct output_iterator_tag {};
165struct forward_iterator_tag       : public input_iterator_tag         {};
166struct bidirectional_iterator_tag : public forward_iterator_tag       {};
167struct random_access_iterator_tag : public bidirectional_iterator_tag {};
168struct contiguous_iterator_tag    : public random_access_iterator_tag {};
169
170// 27.4.3, iterator operations
171template <class InputIterator, class Distance>  // constexpr in C++17
172  constexpr void advance(InputIterator& i, Distance n);
173
174template <class InputIterator>  // constexpr in C++17
175  constexpr typename iterator_traits<InputIterator>::difference_type
176    distance(InputIterator first, InputIterator last);
177
178template <class InputIterator>  // constexpr in C++17
179  constexpr InputIterator next(InputIterator x,
180typename iterator_traits<InputIterator>::difference_type n = 1);
181
182template <class BidirectionalIterator>  // constexpr in C++17
183  constexpr BidirectionalIterator prev(BidirectionalIterator x,
184    typename iterator_traits<BidirectionalIterator>::difference_type n = 1);
185
186// [range.iter.ops], range iterator operations
187namespace ranges {
188  // [range.iter.op.advance], ranges::advance
189  template<input_or_output_iterator I>
190    constexpr void advance(I& i, iter_difference_t<I> n);                          // since C++20
191  template<input_or_output_iterator I, sentinel_for<I> S>
192    constexpr void advance(I& i, S bound);                                         // since C++20
193  template<input_or_output_iterator I, sentinel_for<I> S>
194    constexpr iter_difference_t<I> advance(I& i, iter_difference_t<I> n, S bound); // since C++20
195}
196
197template <class Iterator>
198class reverse_iterator
199    : public iterator<typename iterator_traits<Iterator>::iterator_category, // until C++17
200                      typename iterator_traits<Iterator>::value_type,
201                      typename iterator_traits<Iterator>::difference_type,
202                      typename iterator_traits<Iterator>::pointer,
203                      typename iterator_traits<Iterator>::reference>
204{
205protected:
206    Iterator current;
207public:
208    typedef Iterator                                            iterator_type;
209    typedef typename iterator_traits<Iterator>::difference_type difference_type;
210    typedef typename iterator_traits<Iterator>::reference       reference;
211    typedef typename iterator_traits<Iterator>::pointer         pointer;
212
213    constexpr reverse_iterator();
214    constexpr explicit reverse_iterator(Iterator x);
215    template <class U> constexpr reverse_iterator(const reverse_iterator<U>& u);
216    template <class U> constexpr reverse_iterator& operator=(const reverse_iterator<U>& u);
217    constexpr Iterator base() const;
218    constexpr reference operator*() const;
219    constexpr pointer   operator->() const;
220    constexpr reverse_iterator& operator++();
221    constexpr reverse_iterator  operator++(int);
222    constexpr reverse_iterator& operator--();
223    constexpr reverse_iterator  operator--(int);
224    constexpr reverse_iterator  operator+ (difference_type n) const;
225    constexpr reverse_iterator& operator+=(difference_type n);
226    constexpr reverse_iterator  operator- (difference_type n) const;
227    constexpr reverse_iterator& operator-=(difference_type n);
228    constexpr reference         operator[](difference_type n) const;
229};
230
231template <class Iterator1, class Iterator2>
232constexpr bool                          // constexpr in C++17
233operator==(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
234
235template <class Iterator1, class Iterator2>
236constexpr bool                          // constexpr in C++17
237operator<(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
238
239template <class Iterator1, class Iterator2>
240constexpr bool                          // constexpr in C++17
241operator!=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
242
243template <class Iterator1, class Iterator2>
244constexpr bool                          // constexpr in C++17
245operator>(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
246
247template <class Iterator1, class Iterator2>
248constexpr bool                          // constexpr in C++17
249operator>=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
250
251template <class Iterator1, class Iterator2>
252constexpr bool                          // constexpr in C++17
253operator<=(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y);
254
255template <class Iterator1, class Iterator2>
256constexpr auto
257operator-(const reverse_iterator<Iterator1>& x, const reverse_iterator<Iterator2>& y)
258-> decltype(__y.base() - __x.base());   // constexpr in C++17
259
260template <class Iterator>
261constexpr reverse_iterator<Iterator>
262operator+(typename reverse_iterator<Iterator>::difference_type n,
263          const reverse_iterator<Iterator>& x);   // constexpr in C++17
264
265template <class Iterator>
266constexpr reverse_iterator<Iterator> make_reverse_iterator(Iterator i); // C++14, constexpr in C++17
267
268template <class Container>
269class back_insert_iterator
270    : public iterator<output_iterator_tag, void, void, void, void> // until C++17
271{
272protected:
273    Container* container;
274public:
275    typedef Container                   container_type;
276    typedef void                        value_type;
277    typedef void                        difference_type; // until C++20
278    typedef ptrdiff_t                   difference_type; // since C++20
279    typedef void                        reference;
280    typedef void                        pointer;
281
282    explicit back_insert_iterator(Container& x);  // constexpr in C++20
283    back_insert_iterator& operator=(const typename Container::value_type& value);  // constexpr in C++20
284    back_insert_iterator& operator*();  // constexpr in C++20
285    back_insert_iterator& operator++();  // constexpr in C++20
286    back_insert_iterator  operator++(int);  // constexpr in C++20
287};
288
289template <class Container> back_insert_iterator<Container> back_inserter(Container& x);  // constexpr in C++20
290
291template <class Container>
292class front_insert_iterator
293    : public iterator<output_iterator_tag, void, void, void, void> // until C++17
294{
295protected:
296    Container* container;
297public:
298    typedef Container                    container_type;
299    typedef void                         value_type;
300    typedef void                         difference_type; // until C++20
301    typedef ptrdiff_t                    difference_type; // since C++20
302    typedef void                         reference;
303    typedef void                         pointer;
304
305    explicit front_insert_iterator(Container& x);  // constexpr in C++20
306    front_insert_iterator& operator=(const typename Container::value_type& value);  // constexpr in C++20
307    front_insert_iterator& operator*();  // constexpr in C++20
308    front_insert_iterator& operator++();  // constexpr in C++20
309    front_insert_iterator  operator++(int);  // constexpr in C++20
310};
311
312template <class Container> front_insert_iterator<Container> front_inserter(Container& x);  // constexpr in C++20
313
314template <class Container>
315class insert_iterator
316    : public iterator<output_iterator_tag, void, void, void, void> // until C++17
317{
318protected:
319    Container* container;
320    typename Container::iterator iter;
321public:
322    typedef Container              container_type;
323    typedef void                   value_type;
324    typedef void                   difference_type; // until C++20
325    typedef ptrdiff_t              difference_type; // since C++20
326    typedef void                   reference;
327    typedef void                   pointer;
328
329    insert_iterator(Container& x, typename Container::iterator i);  // constexpr in C++20
330    insert_iterator& operator=(const typename Container::value_type& value);  // constexpr in C++20
331    insert_iterator& operator*();  // constexpr in C++20
332    insert_iterator& operator++();  // constexpr in C++20
333    insert_iterator& operator++(int);  // constexpr in C++20
334};
335
336template <class Container, class Iterator>
337insert_iterator<Container> inserter(Container& x, Iterator i);  // constexpr in C++20
338
339template <class Iterator>
340class move_iterator {
341public:
342    typedef Iterator                                              iterator_type;
343    typedef typename iterator_traits<Iterator>::difference_type   difference_type;
344    typedef Iterator                                              pointer;
345    typedef typename iterator_traits<Iterator>::value_type        value_type;
346    typedef typename iterator_traits<Iterator>::iterator_category iterator_category;
347    typedef value_type&&                                          reference;
348
349    constexpr move_iterator();  // all the constexprs are in C++17
350    constexpr explicit move_iterator(Iterator i);
351    template <class U>
352      constexpr move_iterator(const move_iterator<U>& u);
353    template <class U>
354      constexpr move_iterator& operator=(const move_iterator<U>& u);
355    constexpr iterator_type base() const;
356    constexpr reference operator*() const;
357    constexpr pointer operator->() const;
358    constexpr move_iterator& operator++();
359    constexpr move_iterator operator++(int);
360    constexpr move_iterator& operator--();
361    constexpr move_iterator operator--(int);
362    constexpr move_iterator operator+(difference_type n) const;
363    constexpr move_iterator& operator+=(difference_type n);
364    constexpr move_iterator operator-(difference_type n) const;
365    constexpr move_iterator& operator-=(difference_type n);
366    constexpr unspecified operator[](difference_type n) const;
367private:
368    Iterator current; // exposition only
369};
370
371template <class Iterator1, class Iterator2>
372constexpr bool   // constexpr in C++17
373operator==(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
374
375template <class Iterator1, class Iterator2>
376constexpr bool   // constexpr in C++17
377operator!=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
378
379template <class Iterator1, class Iterator2>
380constexpr bool   // constexpr in C++17
381operator<(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
382
383template <class Iterator1, class Iterator2>
384constexpr bool   // constexpr in C++17
385operator<=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
386
387template <class Iterator1, class Iterator2>
388constexpr bool   // constexpr in C++17
389operator>(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
390
391template <class Iterator1, class Iterator2>
392constexpr bool   // constexpr in C++17
393operator>=(const move_iterator<Iterator1>& x, const move_iterator<Iterator2>& y);
394
395template <class Iterator1, class Iterator2>
396constexpr auto   // constexpr in C++17
397operator-(const move_iterator<Iterator1>& x,
398          const move_iterator<Iterator2>& y) -> decltype(x.base() - y.base());
399
400template <class Iterator>
401constexpr move_iterator<Iterator> operator+(   // constexpr in C++17
402            typename move_iterator<Iterator>::difference_type n,
403            const move_iterator<Iterator>& x);
404
405template <class Iterator>   // constexpr in C++17
406constexpr  move_iterator<Iterator> make_move_iterator(const Iterator& i);
407
408// [default.sentinel], default sentinel
409struct default_sentinel_t;
410inline constexpr default_sentinel_t default_sentinel{};
411
412// [iterators.counted], counted iterators
413template<input_or_output_iterator I> class counted_iterator;
414
415template<input_iterator I>
416  requires see below
417  struct iterator_traits<counted_iterator<I>>;
418
419// [unreachable.sentinel], unreachable sentinel
420struct unreachable_sentinel_t;
421inline constexpr unreachable_sentinel_t unreachable_sentinel{};
422
423template <class T, class charT = char, class traits = char_traits<charT>, class Distance = ptrdiff_t>
424class istream_iterator
425    : public iterator<input_iterator_tag, T, Distance, const T*, const T&> // until C++17
426{
427public:
428    typedef input_iterator_tag           iterator_category;
429    typedef T                            value_type;
430    typedef Distance                     difference_type;
431    typedef const T*                     pointer;
432    typedef const T&                     reference;
433
434    typedef charT                        char_type;
435    typedef traits                       traits_type;
436    typedef basic_istream<charT, traits> istream_type;
437
438    constexpr istream_iterator();
439    istream_iterator(istream_type& s);
440    istream_iterator(const istream_iterator& x);
441    ~istream_iterator();
442
443    const T& operator*() const;
444    const T* operator->() const;
445    istream_iterator& operator++();
446    istream_iterator  operator++(int);
447};
448
449template <class T, class charT, class traits, class Distance>
450bool operator==(const istream_iterator<T,charT,traits,Distance>& x,
451                const istream_iterator<T,charT,traits,Distance>& y);
452template <class T, class charT, class traits, class Distance>
453bool operator!=(const istream_iterator<T,charT,traits,Distance>& x,
454                const istream_iterator<T,charT,traits,Distance>& y);
455
456template <class T, class charT = char, class traits = char_traits<charT> >
457class ostream_iterator
458    : public iterator<output_iterator_tag, void, void, void, void> // until C++17
459{
460public:
461    typedef output_iterator_tag         iterator_category;
462    typedef void                        value_type;
463    typedef void                        difference_type; // until C++20
464    typedef ptrdiff_t                   difference_type; // since C++20
465    typedef void                        pointer;
466    typedef void                        reference;
467
468    typedef charT char_type;
469    typedef traits traits_type;
470    typedef basic_ostream<charT,traits> ostream_type;
471
472    ostream_iterator(ostream_type& s);
473    ostream_iterator(ostream_type& s, const charT* delimiter);
474    ostream_iterator(const ostream_iterator& x);
475    ~ostream_iterator();
476    ostream_iterator& operator=(const T& value);
477
478    ostream_iterator& operator*();
479    ostream_iterator& operator++();
480    ostream_iterator& operator++(int);
481};
482
483template<class charT, class traits = char_traits<charT> >
484class istreambuf_iterator
485    : public iterator<input_iterator_tag, charT, traits::off_type, unspecified, charT> // until C++17
486{
487public:
488    typedef input_iterator_tag              iterator_category;
489    typedef charT                           value_type;
490    typedef traits::off_type                difference_type;
491    typedef unspecified                     pointer;
492    typedef charT                           reference;
493
494    typedef charT                           char_type;
495    typedef traits                          traits_type;
496    typedef traits::int_type                int_type;
497    typedef basic_streambuf<charT, traits>  streambuf_type;
498    typedef basic_istream<charT, traits>    istream_type;
499
500    istreambuf_iterator() noexcept;
501    istreambuf_iterator(istream_type& s) noexcept;
502    istreambuf_iterator(streambuf_type* s) noexcept;
503    istreambuf_iterator(a-private-type) noexcept;
504
505    charT                operator*() const;
506    pointer operator->() const;
507    istreambuf_iterator& operator++();
508    a-private-type       operator++(int);
509
510    bool equal(const istreambuf_iterator& b) const;
511};
512
513template <class charT, class traits>
514bool operator==(const istreambuf_iterator<charT,traits>& a,
515                const istreambuf_iterator<charT,traits>& b);
516template <class charT, class traits>
517bool operator!=(const istreambuf_iterator<charT,traits>& a,
518                const istreambuf_iterator<charT,traits>& b);
519
520template <class charT, class traits = char_traits<charT> >
521class ostreambuf_iterator
522    : public iterator<output_iterator_tag, void, void, void, void> // until C++17
523{
524public:
525    typedef output_iterator_tag            iterator_category;
526    typedef void                           value_type;
527    typedef void                           difference_type; // until C++20
528    typedef ptrdiff_t                      difference_type; // since C++20
529    typedef void                           pointer;
530    typedef void                           reference;
531
532    typedef charT                          char_type;
533    typedef traits                         traits_type;
534    typedef basic_streambuf<charT, traits> streambuf_type;
535    typedef basic_ostream<charT, traits>   ostream_type;
536
537    ostreambuf_iterator(ostream_type& s) noexcept;
538    ostreambuf_iterator(streambuf_type* s) noexcept;
539    ostreambuf_iterator& operator=(charT c);
540    ostreambuf_iterator& operator*();
541    ostreambuf_iterator& operator++();
542    ostreambuf_iterator& operator++(int);
543    bool failed() const noexcept;
544};
545
546template <class C> constexpr auto begin(C& c) -> decltype(c.begin());
547template <class C> constexpr auto begin(const C& c) -> decltype(c.begin());
548template <class C> constexpr auto end(C& c) -> decltype(c.end());
549template <class C> constexpr auto end(const C& c) -> decltype(c.end());
550template <class T, size_t N> constexpr T* begin(T (&array)[N]);
551template <class T, size_t N> constexpr T* end(T (&array)[N]);
552
553template <class C> auto constexpr cbegin(const C& c) -> decltype(std::begin(c));        // C++14
554template <class C> auto constexpr cend(const C& c) -> decltype(std::end(c));            // C++14
555template <class C> auto constexpr rbegin(C& c) -> decltype(c.rbegin());                 // C++14
556template <class C> auto constexpr rbegin(const C& c) -> decltype(c.rbegin());           // C++14
557template <class C> auto constexpr rend(C& c) -> decltype(c.rend());                     // C++14
558template <class C> constexpr auto rend(const C& c) -> decltype(c.rend());               // C++14
559template <class E> reverse_iterator<const E*> constexpr rbegin(initializer_list<E> il); // C++14
560template <class E> reverse_iterator<const E*> constexpr rend(initializer_list<E> il);   // C++14
561template <class T, size_t N> reverse_iterator<T*> constexpr rbegin(T (&array)[N]);      // C++14
562template <class T, size_t N> reverse_iterator<T*> constexpr rend(T (&array)[N]);        // C++14
563template <class C> constexpr auto crbegin(const C& c) -> decltype(std::rbegin(c));      // C++14
564template <class C> constexpr auto crend(const C& c) -> decltype(std::rend(c));          // C++14
565
566// 24.8, container access:
567template <class C> constexpr auto size(const C& c) -> decltype(c.size());         // C++17
568template <class T, size_t N> constexpr size_t size(const T (&array)[N]) noexcept; // C++17
569
570template <class C> constexpr auto ssize(const C& c)
571    -> common_type_t<ptrdiff_t, make_signed_t<decltype(c.size())>>;                    // C++20
572template <class T, ptrdiff_t> constexpr ptrdiff_t ssize(const T (&array)[N]) noexcept; // C++20
573
574template <class C> constexpr auto empty(const C& c) -> decltype(c.empty());       // C++17
575template <class T, size_t N> constexpr bool empty(const T (&array)[N]) noexcept;  // C++17
576template <class E> constexpr bool empty(initializer_list<E> il) noexcept;         // C++17
577template <class C> constexpr auto data(C& c) -> decltype(c.data());               // C++17
578template <class C> constexpr auto data(const C& c) -> decltype(c.data());         // C++17
579template <class T, size_t N> constexpr T* data(T (&array)[N]) noexcept;           // C++17
580template <class E> constexpr const E* data(initializer_list<E> il) noexcept;      // C++17
581
582}  // std
583
584*/
585
586#include <__config>
587#include <__debug>
588#include <__functional_base>
589#include <__iterator/access.h>
590#include <__iterator/advance.h>
591#include <__iterator/back_insert_iterator.h>
592#include <__iterator/common_iterator.h>
593#include <__iterator/concepts.h>
594#include <__iterator/counted_iterator.h>
595#include <__iterator/data.h>
596#include <__iterator/default_sentinel.h>
597#include <__iterator/distance.h>
598#include <__iterator/empty.h>
599#include <__iterator/erase_if_container.h>
600#include <__iterator/front_insert_iterator.h>
601#include <__iterator/incrementable_traits.h>
602#include <__iterator/indirectly_comparable.h>
603#include <__iterator/insert_iterator.h>
604#include <__iterator/istream_iterator.h>
605#include <__iterator/istreambuf_iterator.h>
606#include <__iterator/iter_move.h>
607#include <__iterator/iter_swap.h>
608#include <__iterator/iterator.h>
609#include <__iterator/iterator_traits.h>
610#include <__iterator/move_iterator.h>
611#include <__iterator/next.h>
612#include <__iterator/ostream_iterator.h>
613#include <__iterator/ostreambuf_iterator.h>
614#include <__iterator/prev.h>
615#include <__iterator/projected.h>
616#include <__iterator/readable_traits.h>
617#include <__iterator/reverse_access.h>
618#include <__iterator/reverse_iterator.h>
619#include <__iterator/size.h>
620#include <__iterator/unreachable_sentinel.h>
621#include <__iterator/wrap_iter.h>
622#include <__memory/addressof.h>
623#include <__memory/pointer_traits.h>
624#include <__utility/forward.h>
625#include <compare>
626#include <concepts> // Mandated by the Standard.
627#include <cstddef>
628#include <initializer_list>
629#include <type_traits>
630#include <version>
631
632#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
633#pragma GCC system_header
634#endif
635
636#endif // _LIBCPP_ITERATOR
637