1// std::initializer_list support -*- C++ -*-
2
3// Copyright (C) 2008-2024 Free Software Foundation, Inc.
4//
5// This file is part of GCC.
6//
7// GCC is free software; you can redistribute it and/or modify
8// it under the terms of the GNU General Public License as published by
9// the Free Software Foundation; either version 3, or (at your option)
10// any later version.
11//
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13// but WITHOUT ANY WARRANTY; without even the implied warranty of
14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15// GNU General Public License for more details.
16//
17// Under Section 7 of GPL version 3, you are granted additional
18// permissions described in the GCC Runtime Library Exception, version
19// 3.1, as published by the Free Software Foundation.
20
21// You should have received a copy of the GNU General Public License and
22// a copy of the GCC Runtime Library Exception along with this program;
23// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24// <http://www.gnu.org/licenses/>.
25
26/** @file initializer_list
27 * This is a Standard C++ Library header.
28 */
29
30#ifndef _INITIALIZER_LIST
31#define _INITIALIZER_LIST
32
33#pragma GCC system_header
34
35#if __cplusplus < 201103L
36# include <bits/c++0x_warning.h>
37#else // C++0x
38
39#include <bits/c++config.h>
40
41namespace std _GLIBCXX_VISIBILITY(default)
42{
43 /// initializer_list
44 template<class _E>
45 class initializer_list
46 {
47 public:
48 typedef _E value_type;
49 typedef const _E& reference;
50 typedef const _E& const_reference;
51 typedef size_t size_type;
52 typedef const _E* iterator;
53 typedef const _E* const_iterator;
54
55 private:
56 iterator _M_array;
57 size_type _M_len;
58
59 // The compiler can call a private constructor.
60 constexpr initializer_list(const_iterator __a, size_type __l)
61 : _M_array(__a), _M_len(__l) { }
62
63 public:
64 constexpr initializer_list() noexcept
65 : _M_array(0), _M_len(0) { }
66
67 // Number of elements.
68 constexpr size_type
69 size() const noexcept { return _M_len; }
70
71 // First element.
72 constexpr const_iterator
73 begin() const noexcept { return _M_array; }
74
75 // One past the last element.
76 constexpr const_iterator
77 end() const noexcept { return begin() + size(); }
78 };
79
80 /**
81 * @brief Return an iterator pointing to the first element of
82 * the initializer_list.
83 * @param __ils Initializer list.
84 * @relates initializer_list
85 */
86 template<class _Tp>
87 constexpr const _Tp*
88 begin(initializer_list<_Tp> __ils) noexcept
89 { return __ils.begin(); }
90
91 /**
92 * @brief Return an iterator pointing to one past the last element
93 * of the initializer_list.
94 * @param __ils Initializer list.
95 * @relates initializer_list
96 */
97 template<class _Tp>
98 constexpr const _Tp*
99 end(initializer_list<_Tp> __ils) noexcept
100 { return __ils.end(); }
101}
102
103#endif // C++11
104
105#endif // _INITIALIZER_LIST
106