1// std::initializer_list support -*- C++ -*- 
2 
3// Copyright (C) 2008-2019 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 
43namespace 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