1 // <range_access.h> -*- C++ -*-
3 // Copyright (C) 2010-2015 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // Under Section 7 of GPL version 3, you are granted additional
17 // permissions described in the GCC Runtime Library Exception, version
18 // 3.1, as published by the Free Software Foundation.
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21 // a copy of the GCC Runtime Library Exception along with this program;
22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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25 /** @file bits/range_access.h
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{iterator}
30 #ifndef _GLIBCXX_RANGE_ACCESS_H
31 #define _GLIBCXX_RANGE_ACCESS_H 1
33 #pragma GCC system_header
35 #if __cplusplus >= 201103L
36 #include <initializer_list>
37 namespace std _GLIBCXX_VISIBILITY(default)
39 _GLIBCXX_BEGIN_NAMESPACE_VERSION
42 * @brief Return an iterator pointing to the first element of
44 * @param __cont Container.
46 template<class _Container>
48 begin(_Container& __cont) -> decltype(__cont.begin())
49 { return __cont.begin(); }
52 * @brief Return an iterator pointing to the first element of
53 * the const container.
54 * @param __cont Container.
56 template<class _Container>
58 begin(const _Container& __cont) -> decltype(__cont.begin())
59 { return __cont.begin(); }
62 * @brief Return an iterator pointing to one past the last element of
64 * @param __cont Container.
66 template<class _Container>
68 end(_Container& __cont) -> decltype(__cont.end())
69 { return __cont.end(); }
72 * @brief Return an iterator pointing to one past the last element of
73 * the const container.
74 * @param __cont Container.
76 template<class _Container>
78 end(const _Container& __cont) -> decltype(__cont.end())
79 { return __cont.end(); }
82 * @brief Return an iterator pointing to the first element of the array.
85 template<class _Tp, size_t _Nm>
86 inline _GLIBCXX14_CONSTEXPR _Tp*
87 begin(_Tp (&__arr)[_Nm])
91 * @brief Return an iterator pointing to one past the last element
95 template<class _Tp, size_t _Nm>
96 inline _GLIBCXX14_CONSTEXPR _Tp*
97 end(_Tp (&__arr)[_Nm])
98 { return __arr + _Nm; }
100 #if __cplusplus >= 201402L
102 * @brief Return an iterator pointing to the first element of
103 * the const container.
104 * @param __cont Container.
106 template<class _Container>
107 inline constexpr auto
108 cbegin(const _Container& __cont) noexcept(noexcept(std::begin(__cont)))
109 -> decltype(std::begin(__cont))
110 { return std::begin(__cont); }
113 * @brief Return an iterator pointing to one past the last element of
114 * the const container.
115 * @param __cont Container.
117 template<class _Container>
118 inline constexpr auto
119 cend(const _Container& __cont) noexcept(noexcept(std::end(__cont)))
120 -> decltype(std::end(__cont))
121 { return std::end(__cont); }
124 * @brief Return a reverse iterator pointing to the last element of
126 * @param __cont Container.
128 template<class _Container>
130 rbegin(_Container& __cont) -> decltype(__cont.rbegin())
131 { return __cont.rbegin(); }
134 * @brief Return a reverse iterator pointing to the last element of
135 * the const container.
136 * @param __cont Container.
138 template<class _Container>
140 rbegin(const _Container& __cont) -> decltype(__cont.rbegin())
141 { return __cont.rbegin(); }
144 * @brief Return a reverse iterator pointing one past the first element of
146 * @param __cont Container.
148 template<class _Container>
150 rend(_Container& __cont) -> decltype(__cont.rend())
151 { return __cont.rend(); }
154 * @brief Return a reverse iterator pointing one past the first element of
155 * the const container.
156 * @param __cont Container.
158 template<class _Container>
160 rend(const _Container& __cont) -> decltype(__cont.rend())
161 { return __cont.rend(); }
164 * @brief Return a reverse iterator pointing to the last element of
166 * @param __arr Array.
168 template<class _Tp, size_t _Nm>
169 inline reverse_iterator<_Tp*>
170 rbegin(_Tp (&__arr)[_Nm])
171 { return reverse_iterator<_Tp*>(__arr + _Nm); }
174 * @brief Return a reverse iterator pointing one past the first element of
176 * @param __arr Array.
178 template<class _Tp, size_t _Nm>
179 inline reverse_iterator<_Tp*>
180 rend(_Tp (&__arr)[_Nm])
181 { return reverse_iterator<_Tp*>(__arr); }
184 * @brief Return a reverse iterator pointing to the last element of
185 * the initializer_list.
186 * @param __il initializer_list.
189 inline reverse_iterator<const _Tp*>
190 rbegin(initializer_list<_Tp> __il)
191 { return reverse_iterator<const _Tp*>(__il.end()); }
194 * @brief Return a reverse iterator pointing one past the first element of
195 * the initializer_list.
196 * @param __il initializer_list.
199 inline reverse_iterator<const _Tp*>
200 rend(initializer_list<_Tp> __il)
201 { return reverse_iterator<const _Tp*>(__il.begin()); }
204 * @brief Return a reverse iterator pointing to the last element of
205 * the const container.
206 * @param __cont Container.
208 template<class _Container>
210 crbegin(const _Container& __cont) -> decltype(std::rbegin(__cont))
211 { return std::rbegin(__cont); }
214 * @brief Return a reverse iterator pointing one past the first element of
215 * the const container.
216 * @param __cont Container.
218 template<class _Container>
220 crend(const _Container& __cont) -> decltype(std::rend(__cont))
221 { return std::rend(__cont); }
225 _GLIBCXX_END_NAMESPACE_VERSION
230 #endif // _GLIBCXX_RANGE_ACCESS_H