1 // TR1 utility -*- C++ -*-
3 // Copyright (C) 2007, 2008 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 2, 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 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
21 // As a special exception, you may use this file as part of a free software
22 // library without restriction. Specifically, if other files instantiate
23 // templates or use macros or inline functions from this file, or you compile
24 // this file and link it with other files to produce an executable, this
25 // file does not by itself cause the resulting executable to be covered by
26 // the GNU General Public License. This exception does not however
27 // invalidate any other reasons why the executable file might be covered by
28 // the GNU General Public License.
30 /** @file tr1_impl/utility
31 * This is an internal header file, included by other library headers.
32 * You should not attempt to use it directly.
37 _GLIBCXX_BEGIN_NAMESPACE_TR1
42 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
43 template<std::size_t _Int, class _Tp>
45 template<int _Int, class _Tp>
49 // Various functions which give std::pair a tuple-like interface.
50 template<class _Tp1, class _Tp2>
51 struct tuple_size<std::pair<_Tp1, _Tp2> >
52 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
53 { static const std::size_t value = 2; };
55 { static const int value = 2; };
58 template<class _Tp1, class _Tp2>
59 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
64 tuple_size<std::pair<_Tp1, _Tp2> >::value;
66 template<class _Tp1, class _Tp2>
67 struct tuple_element<0, std::pair<_Tp1, _Tp2> >
68 { typedef _Tp1 type; };
70 template<class _Tp1, class _Tp2>
71 struct tuple_element<1, std::pair<_Tp1, _Tp2> >
72 { typedef _Tp2 type; };
74 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
75 template<std::size_t _Int>
84 template<typename _Tp1, typename _Tp2>
85 static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair)
86 { return __pair.first; }
88 template<typename _Tp1, typename _Tp2>
89 static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
90 { return __pair.first; }
96 template<typename _Tp1, typename _Tp2>
97 static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair)
98 { return __pair.second; }
100 template<typename _Tp1, typename _Tp2>
101 static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
102 { return __pair.second; }
105 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
106 template<std::size_t _Int, class _Tp1, class _Tp2>
108 template<int _Int, class _Tp1, class _Tp2>
110 inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
111 get(std::pair<_Tp1, _Tp2>& __in)
112 { return __pair_get<_Int>::__get(__in); }
114 #ifdef _GLIBCXX_INCLUDE_AS_CXX0X
115 template<std::size_t _Int, class _Tp1, class _Tp2>
117 template<int _Int, class _Tp1, class _Tp2>
119 inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
120 get(const std::pair<_Tp1, _Tp2>& __in)
121 { return __pair_get<_Int>::__const_get(__in); }
123 _GLIBCXX_END_NAMESPACE_TR1