1 | // std::initializer_list support -*- C++ -*- |
2 | |
3 | // Copyright (C) 2008-2017 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 | // |
12 | // GCC is distributed in the hope that it will be useful, |
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 | #pragma GCC visibility push(default) |
40 | |
41 | #include <bits/c++config.h> |
42 | |
43 | namespace std |
44 | { |
45 | /// initializer_list |
46 | template<class _E> |
47 | class initializer_list |
48 | { |
49 | public: |
50 | typedef _E value_type; |
51 | typedef const _E& reference; |
52 | typedef const _E& const_reference; |
53 | typedef size_t size_type; |
54 | typedef const _E* iterator; |
55 | typedef const _E* const_iterator; |
56 | |
57 | private: |
58 | iterator _M_array; |
59 | size_type _M_len; |
60 | |
61 | // The compiler can call a private constructor. |
62 | constexpr initializer_list(const_iterator __a, size_type __l) |
63 | : _M_array(__a), _M_len(__l) { } |
64 | |
65 | public: |
66 | constexpr initializer_list() noexcept |
67 | : _M_array(0), _M_len(0) { } |
68 | |
69 | // Number of elements. |
70 | constexpr size_type |
71 | size() const noexcept { return _M_len; } |
72 | |
73 | // First element. |
74 | constexpr const_iterator |
75 | begin() const noexcept { return _M_array; } |
76 | |
77 | // One past the last element. |
78 | constexpr const_iterator |
79 | end() const noexcept { return begin() + size(); } |
80 | }; |
81 | |
82 | /** |
83 | * @brief Return an iterator pointing to the first element of |
84 | * the initializer_list. |
85 | * @param __ils Initializer list. |
86 | */ |
87 | template<class _Tp> |
88 | constexpr const _Tp* |
89 | begin(initializer_list<_Tp> __ils) noexcept |
90 | { return __ils.begin(); } |
91 | |
92 | /** |
93 | * @brief Return an iterator pointing to one past the last element |
94 | * of the initializer_list. |
95 | * @param __ils 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 | #pragma GCC visibility pop |
104 | |
105 | #endif // C++11 |
106 | |
107 | #endif // _INITIALIZER_LIST |
108 | |