1 // TR1 utility -*- C++ -*-
3 // Copyright (C) 2007, 2008, 2009 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/>.
25 /** @file tr1_impl/utility
26 * This is an internal header file, included by other library headers.
27 * You should not attempt to use it directly.
32 _GLIBCXX_BEGIN_NAMESPACE_TR1
37 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
38 template<std::size_t _Int, class _Tp>
40 template<int _Int, class _Tp>
44 // Various functions which give std::pair a tuple-like interface.
45 template<class _Tp1, class _Tp2>
46 struct tuple_size<std::pair<_Tp1, _Tp2> >
47 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
48 { static const std::size_t value = 2; };
50 { static const int value = 2; };
53 template<class _Tp1, class _Tp2>
54 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
59 tuple_size<std::pair<_Tp1, _Tp2> >::value;
61 template<class _Tp1, class _Tp2>
62 struct tuple_element<0, std::pair<_Tp1, _Tp2> >
63 { typedef _Tp1 type; };
65 template<class _Tp1, class _Tp2>
66 struct tuple_element<1, std::pair<_Tp1, _Tp2> >
67 { typedef _Tp2 type; };
69 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
70 template<std::size_t _Int>
79 template<typename _Tp1, typename _Tp2>
80 static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair)
81 { return __pair.first; }
83 template<typename _Tp1, typename _Tp2>
84 static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
85 { return __pair.first; }
91 template<typename _Tp1, typename _Tp2>
92 static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair)
93 { return __pair.second; }
95 template<typename _Tp1, typename _Tp2>
96 static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
97 { return __pair.second; }
100 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
101 template<std::size_t _Int, class _Tp1, class _Tp2>
103 template<int _Int, class _Tp1, class _Tp2>
105 inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
106 get(std::pair<_Tp1, _Tp2>& __in)
107 { return __pair_get<_Int>::__get(__in); }
109 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
110 template<std::size_t _Int, class _Tp1, class _Tp2>
112 template<int _Int, class _Tp1, class _Tp2>
114 inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
115 get(const std::pair<_Tp1, _Tp2>& __in)
116 { return __pair_get<_Int>::__const_get(__in); }
118 _GLIBCXX_END_NAMESPACE_TR1