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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___CXX03___ITERATOR_MOVE_ITERATOR_H
11#define _LIBCPP___CXX03___ITERATOR_MOVE_ITERATOR_H
12
13#include <__cxx03/__config>
14#include <__cxx03/__iterator/iterator_traits.h>
15#include <__cxx03/__type_traits/conditional.h>
16#include <__cxx03/__type_traits/enable_if.h>
17#include <__cxx03/__type_traits/is_assignable.h>
18#include <__cxx03/__type_traits/is_constructible.h>
19#include <__cxx03/__type_traits/is_convertible.h>
20#include <__cxx03/__type_traits/is_reference.h>
21#include <__cxx03/__type_traits/is_same.h>
22#include <__cxx03/__type_traits/remove_reference.h>
23#include <__cxx03/__utility/declval.h>
24#include <__cxx03/__utility/move.h>
25
26#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
27# pragma GCC system_header
28#endif
29
30_LIBCPP_PUSH_MACROS
31#include <__cxx03/__undef_macros>
32
33_LIBCPP_BEGIN_NAMESPACE_STD
34
35template <class _Iter>
36class _LIBCPP_TEMPLATE_VIS move_iterator {
37public:
38 typedef _Iter iterator_type;
39 typedef _If< __has_random_access_iterator_category<_Iter>::value,
40 random_access_iterator_tag,
41 typename iterator_traits<_Iter>::iterator_category >
42 iterator_category;
43 typedef typename iterator_traits<iterator_type>::value_type value_type;
44 typedef typename iterator_traits<iterator_type>::difference_type difference_type;
45 typedef iterator_type pointer;
46
47 typedef typename iterator_traits<iterator_type>::reference __reference;
48 typedef __conditional_t<is_reference<__reference>::value, __libcpp_remove_reference_t<__reference>&&, __reference>
49 reference;
50
51 _LIBCPP_HIDE_FROM_ABI explicit move_iterator(_Iter __i) : __current_(std::move(__i)) {}
52
53 _LIBCPP_HIDE_FROM_ABI move_iterator& operator++() {
54 ++__current_;
55 return *this;
56 }
57
58 _LIBCPP_HIDE_FROM_ABI pointer operator->() const { return __current_; }
59
60 _LIBCPP_HIDE_FROM_ABI move_iterator() : __current_() {}
61
62 template <class _Up, __enable_if_t< !is_same<_Up, _Iter>::value && is_convertible<const _Up&, _Iter>::value, int> = 0>
63 _LIBCPP_HIDE_FROM_ABI move_iterator(const move_iterator<_Up>& __u) : __current_(__u.base()) {}
64
65 template <class _Up,
66 __enable_if_t< !is_same<_Up, _Iter>::value && is_convertible<const _Up&, _Iter>::value &&
67 is_assignable<_Iter&, const _Up&>::value,
68 int> = 0>
69 _LIBCPP_HIDE_FROM_ABI move_iterator& operator=(const move_iterator<_Up>& __u) {
70 __current_ = __u.base();
71 return *this;
72 }
73
74 _LIBCPP_HIDE_FROM_ABI _Iter base() const { return __current_; }
75
76 _LIBCPP_HIDE_FROM_ABI reference operator*() const { return static_cast<reference>(*__current_); }
77 _LIBCPP_HIDE_FROM_ABI reference operator[](difference_type __n) const {
78 return static_cast<reference>(__current_[__n]);
79 }
80
81 _LIBCPP_HIDE_FROM_ABI move_iterator operator++(int) {
82 move_iterator __tmp(*this);
83 ++__current_;
84 return __tmp;
85 }
86
87 _LIBCPP_HIDE_FROM_ABI move_iterator& operator--() {
88 --__current_;
89 return *this;
90 }
91 _LIBCPP_HIDE_FROM_ABI move_iterator operator--(int) {
92 move_iterator __tmp(*this);
93 --__current_;
94 return __tmp;
95 }
96 _LIBCPP_HIDE_FROM_ABI move_iterator operator+(difference_type __n) const { return move_iterator(__current_ + __n); }
97 _LIBCPP_HIDE_FROM_ABI move_iterator& operator+=(difference_type __n) {
98 __current_ += __n;
99 return *this;
100 }
101 _LIBCPP_HIDE_FROM_ABI move_iterator operator-(difference_type __n) const { return move_iterator(__current_ - __n); }
102 _LIBCPP_HIDE_FROM_ABI move_iterator& operator-=(difference_type __n) {
103 __current_ -= __n;
104 return *this;
105 }
106
107private:
108 template <class _It2>
109 friend class move_iterator;
110
111 _Iter __current_;
112};
113_LIBCPP_CTAD_SUPPORTED_FOR_TYPE(move_iterator);
114
115template <class _Iter1, class _Iter2>
116inline _LIBCPP_HIDE_FROM_ABI bool operator==(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) {
117 return __x.base() == __y.base();
118}
119
120template <class _Iter1, class _Iter2>
121inline _LIBCPP_HIDE_FROM_ABI bool operator!=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) {
122 return __x.base() != __y.base();
123}
124
125template <class _Iter1, class _Iter2>
126inline _LIBCPP_HIDE_FROM_ABI bool operator<(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) {
127 return __x.base() < __y.base();
128}
129
130template <class _Iter1, class _Iter2>
131inline _LIBCPP_HIDE_FROM_ABI bool operator>(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) {
132 return __x.base() > __y.base();
133}
134
135template <class _Iter1, class _Iter2>
136inline _LIBCPP_HIDE_FROM_ABI bool operator<=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) {
137 return __x.base() <= __y.base();
138}
139
140template <class _Iter1, class _Iter2>
141inline _LIBCPP_HIDE_FROM_ABI bool operator>=(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) {
142 return __x.base() >= __y.base();
143}
144
145template <class _Iter1, class _Iter2>
146inline _LIBCPP_HIDE_FROM_ABI typename move_iterator<_Iter1>::difference_type
147operator-(const move_iterator<_Iter1>& __x, const move_iterator<_Iter2>& __y) {
148 return __x.base() - __y.base();
149}
150
151template <class _Iter>
152inline _LIBCPP_HIDE_FROM_ABI move_iterator<_Iter>
153operator+(typename move_iterator<_Iter>::difference_type __n, const move_iterator<_Iter>& __x) {
154 return move_iterator<_Iter>(__x.base() + __n);
155}
156
157template <class _Iter>
158inline _LIBCPP_HIDE_FROM_ABI move_iterator<_Iter> make_move_iterator(_Iter __i) {
159 return move_iterator<_Iter>(std::move(__i));
160}
161
162_LIBCPP_END_NAMESPACE_STD
163
164_LIBCPP_POP_MACROS
165
166#endif // _LIBCPP___CXX03___ITERATOR_MOVE_ITERATOR_H
167

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source code of libcxx/include/__cxx03/__iterator/move_iterator.h