source: Daodan/MSYS2/mingw32/include/c++/11.2.0/tr1/utility@ 1171

Last change on this file since 1171 was 1166, checked in by rossy, 3 years ago

Daodan: Replace MinGW build env with an up-to-date MSYS2 env

File size: 3.1 KB
RevLine 
[1166]1// TR1 utility -*- C++ -*-
2
3// Copyright (C) 2004-2021 Free Software Foundation, Inc.
4//
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)
9// any later version.
10
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.
15
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.
19
20// You should have received a copy of the GNU General Public License and
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
23// <http://www.gnu.org/licenses/>.
24
25/** @file tr1/utility
26 * This is a TR1 C++ Library header.
27 */
28
29#ifndef _GLIBCXX_TR1_UTILITY
30#define _GLIBCXX_TR1_UTILITY 1
31
32#pragma GCC system_header
33
34#include <bits/c++config.h>
35#include <bits/stl_relops.h>
36#include <bits/stl_pair.h>
37
38namespace std _GLIBCXX_VISIBILITY(default)
39{
40_GLIBCXX_BEGIN_NAMESPACE_VERSION
41
42namespace tr1
43{
44 template<class _Tp>
45 class tuple_size;
46
47 template<int _Int, class _Tp>
48 class tuple_element;
49
50 // Various functions which give std::pair a tuple-like interface.
51 template<class _Tp1, class _Tp2>
52 struct tuple_size<std::pair<_Tp1, _Tp2> >
53 { static const int value = 2; };
54
55 template<class _Tp1, class _Tp2>
56 const int
57 tuple_size<std::pair<_Tp1, _Tp2> >::value;
58
59 template<class _Tp1, class _Tp2>
60 struct tuple_element<0, std::pair<_Tp1, _Tp2> >
61 { typedef _Tp1 type; };
62
63 template<class _Tp1, class _Tp2>
64 struct tuple_element<1, std::pair<_Tp1, _Tp2> >
65 { typedef _Tp2 type; };
66
67 template<int _Int>
68 struct __pair_get;
69
70 template<>
71 struct __pair_get<0>
72 {
73 template<typename _Tp1, typename _Tp2>
74 static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair)
75 { return __pair.first; }
76
77 template<typename _Tp1, typename _Tp2>
78 static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
79 { return __pair.first; }
80 };
81
82 template<>
83 struct __pair_get<1>
84 {
85 template<typename _Tp1, typename _Tp2>
86 static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair)
87 { return __pair.second; }
88
89 template<typename _Tp1, typename _Tp2>
90 static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
91 { return __pair.second; }
92 };
93
94 template<int _Int, class _Tp1, class _Tp2>
95 inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
96 get(std::pair<_Tp1, _Tp2>& __in)
97 { return __pair_get<_Int>::__get(__in); }
98
99 template<int _Int, class _Tp1, class _Tp2>
100 inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
101 get(const std::pair<_Tp1, _Tp2>& __in)
102 { return __pair_get<_Int>::__const_get(__in); }
103}
104
105_GLIBCXX_END_NAMESPACE_VERSION
106}
107
108#endif // _GLIBCXX_TR1_UTILITY
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