1 // TR1 utility -*- C++ -*-
3 // Copyright (C) 2004-2018 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.
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/>.
26 * This is a TR1 C++ Library header.
29 #ifndef _GLIBCXX_TR1_UTILITY
30 #define _GLIBCXX_TR1_UTILITY 1
32 #pragma GCC system_header
34 #include <bits/c++config.h>
35 #include <bits/stl_relops.h>
36 #include <bits/stl_pair.h>
38 namespace std _GLIBCXX_VISIBILITY(default)
40 _GLIBCXX_BEGIN_NAMESPACE_VERSION
47 template<int _Int, class _Tp>
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; };
55 template<class _Tp1, class _Tp2>
57 tuple_size<std::pair<_Tp1, _Tp2> >::value;
59 template<class _Tp1, class _Tp2>
60 struct tuple_element<0, std::pair<_Tp1, _Tp2> >
61 { typedef _Tp1 type; };
63 template<class _Tp1, class _Tp2>
64 struct tuple_element<1, std::pair<_Tp1, _Tp2> >
65 { typedef _Tp2 type; };
73 template<typename _Tp1, typename _Tp2>
74 static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair)
75 { return __pair.first; }
77 template<typename _Tp1, typename _Tp2>
78 static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
79 { return __pair.first; }
85 template<typename _Tp1, typename _Tp2>
86 static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair)
87 { return __pair.second; }
89 template<typename _Tp1, typename _Tp2>
90 static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
91 { return __pair.second; }
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); }
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); }
105 _GLIBCXX_END_NAMESPACE_VERSION
108 #endif // _GLIBCXX_TR1_UTILITY