// TR1 utility -*- C++ -*-// Copyright (C) 2004, 2005 Free Software Foundation, Inc.//// This file is part of the GNU ISO C++ Library. This library is free// software; you can redistribute it and/or modify it under the// terms of the GNU General Public License as published by the// Free Software Foundation; either version 2, or (at your option)// any later version.// This library is distributed in the hope that it will be useful,// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the// GNU General Public License for more details.// You should have received a copy of the GNU General Public License along// with this library; see the file COPYING. If not, write to the Free// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,// USA.// As a special exception, you may use this file as part of a free software// library without restriction. Specifically, if other files instantiate// templates or use macros or inline functions from this file, or you compile// this file and link it with other files to produce an executable, this// file does not by itself cause the resulting executable to be covered by// the GNU General Public License. This exception does not however// invalidate any other reasons why the executable file might be covered by// the GNU General Public License./** @file* This is a TR1 C++ Library header.*/#ifndef _TR1_UTILITY#define _TR1_UTILITY 1#include "../utility"namespace std{namespace tr1{template<class _Tp> class tuple_size;template<int _Int, class _Tp> class tuple_element;// Various functions which give std::pair a tuple-like interface.template<class _Tp1, class _Tp2>struct tuple_size<std::pair<_Tp1, _Tp2> >{ static const int value = 2; };template<class _Tp1, class _Tp2>struct tuple_element<0, std::pair<_Tp1, _Tp2> >{ typedef _Tp1 type; };template<class _Tp1, class _Tp2>struct tuple_element<1, std::pair<_Tp1, _Tp2> >{ typedef _Tp2 type; };template<int _Int> struct __pair_get;template<>struct __pair_get<0>{template<typename _Tp1, typename _Tp2>static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair){ return __pair.first; }template<typename _Tp1, typename _Tp2>static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair){ return __pair.first; }};template<>struct __pair_get<1>{template<typename _Tp1, typename _Tp2>static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair){ return __pair.second; }template<typename _Tp1, typename _Tp2>static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair){ return __pair.second; }};template<int _Int, class _Tp1, class _Tp2>typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&get(pair<_Tp1, _Tp2>& __in){ return __pair_get<_Int>::__get(__in); }template<int _Int, class _Tp1, class _Tp2>const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&get(const pair<_Tp1, _Tp2>& __in){ return __pair_get<_Int>::__const_get(__in); }}}#endif