126 lines
3.8 KiB
C++
126 lines
3.8 KiB
C++
// TR1 utility -*- C++ -*-
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// Copyright (C) 2007, 2008 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/** @file tr1_impl/utility
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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namespace std
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{
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_GLIBCXX_BEGIN_NAMESPACE_TR1
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template<class _Tp>
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class tuple_size;
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#ifdef _GLIBCXX_INCLUDE_AS_CXX0X
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template<std::size_t _Int, class _Tp>
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#else
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template<int _Int, class _Tp>
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#endif
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class tuple_element;
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// Various functions which give std::pair a tuple-like interface.
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template<class _Tp1, class _Tp2>
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struct tuple_size<std::pair<_Tp1, _Tp2> >
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#ifdef _GLIBCXX_INCLUDE_AS_CXX0X
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{ static const std::size_t value = 2; };
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#else
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{ static const int value = 2; };
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#endif
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template<class _Tp1, class _Tp2>
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#ifdef _GLIBCXX_INCLUDE_AS_CXX0X
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const std::size_t
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#else
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const int
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#endif
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tuple_size<std::pair<_Tp1, _Tp2> >::value;
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template<class _Tp1, class _Tp2>
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struct tuple_element<0, std::pair<_Tp1, _Tp2> >
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{ typedef _Tp1 type; };
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template<class _Tp1, class _Tp2>
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struct tuple_element<1, std::pair<_Tp1, _Tp2> >
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{ typedef _Tp2 type; };
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#ifdef _GLIBCXX_INCLUDE_AS_CXX0X
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template<std::size_t _Int>
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#else
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template<int _Int>
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#endif
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struct __pair_get;
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template<>
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struct __pair_get<0>
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{
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template<typename _Tp1, typename _Tp2>
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static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair)
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{ return __pair.first; }
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template<typename _Tp1, typename _Tp2>
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static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
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{ return __pair.first; }
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};
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template<>
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struct __pair_get<1>
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{
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template<typename _Tp1, typename _Tp2>
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static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair)
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{ return __pair.second; }
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template<typename _Tp1, typename _Tp2>
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static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair)
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{ return __pair.second; }
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};
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#ifdef _GLIBCXX_INCLUDE_AS_CXX0X
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template<std::size_t _Int, class _Tp1, class _Tp2>
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#else
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template<int _Int, class _Tp1, class _Tp2>
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#endif
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inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
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get(std::pair<_Tp1, _Tp2>& __in)
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{ return __pair_get<_Int>::__get(__in); }
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#ifdef _GLIBCXX_INCLUDE_AS_CXX0X
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template<std::size_t _Int, class _Tp1, class _Tp2>
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#else
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template<int _Int, class _Tp1, class _Tp2>
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#endif
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inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
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get(const std::pair<_Tp1, _Tp2>& __in)
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{ return __pair_get<_Int>::__const_get(__in); }
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_GLIBCXX_END_NAMESPACE_TR1
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}
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