1*404b540aSrobert// TR1 utility -*- C++ -*- 2*404b540aSrobert 3*404b540aSrobert// Copyright (C) 2004, 2005, 2006, 2007 Free Software Foundation, Inc. 4*404b540aSrobert// 5*404b540aSrobert// This file is part of the GNU ISO C++ Library. This library is free 6*404b540aSrobert// software; you can redistribute it and/or modify it under the 7*404b540aSrobert// terms of the GNU General Public License as published by the 8*404b540aSrobert// Free Software Foundation; either version 2, or (at your option) 9*404b540aSrobert// any later version. 10*404b540aSrobert 11*404b540aSrobert// This library is distributed in the hope that it will be useful, 12*404b540aSrobert// but WITHOUT ANY WARRANTY; without even the implied warranty of 13*404b540aSrobert// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14*404b540aSrobert// GNU General Public License for more details. 15*404b540aSrobert 16*404b540aSrobert// You should have received a copy of the GNU General Public License along 17*404b540aSrobert// with this library; see the file COPYING. If not, write to the Free 18*404b540aSrobert// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19*404b540aSrobert// USA. 20*404b540aSrobert 21*404b540aSrobert// As a special exception, you may use this file as part of a free software 22*404b540aSrobert// library without restriction. Specifically, if other files instantiate 23*404b540aSrobert// templates or use macros or inline functions from this file, or you compile 24*404b540aSrobert// this file and link it with other files to produce an executable, this 25*404b540aSrobert// file does not by itself cause the resulting executable to be covered by 26*404b540aSrobert// the GNU General Public License. This exception does not however 27*404b540aSrobert// invalidate any other reasons why the executable file might be covered by 28*404b540aSrobert// the GNU General Public License. 29*404b540aSrobert 30*404b540aSrobert/** @file tr1/utility 31*404b540aSrobert * This is a TR1 C++ Library header. 32*404b540aSrobert */ 33*404b540aSrobert 34*404b540aSrobert#ifndef _TR1_UTILITY 35*404b540aSrobert#define _TR1_UTILITY 1 36*404b540aSrobert 37*404b540aSrobert#include "../utility" 38*404b540aSrobert 39*404b540aSrobertnamespace std 40*404b540aSrobert{ 41*404b540aSrobert_GLIBCXX_BEGIN_NAMESPACE(tr1) 42*404b540aSrobert 43*404b540aSrobert template<class _Tp> class tuple_size; 44*404b540aSrobert template<int _Int, class _Tp> class tuple_element; 45*404b540aSrobert 46*404b540aSrobert // Various functions which give std::pair a tuple-like interface. 47*404b540aSrobert template<class _Tp1, class _Tp2> 48*404b540aSrobert struct tuple_size<std::pair<_Tp1, _Tp2> > 49*404b540aSrobert { static const int value = 2; }; 50*404b540aSrobert 51*404b540aSrobert template<class _Tp1, class _Tp2> 52*404b540aSrobert const int tuple_size<std::pair<_Tp1, _Tp2> >::value; 53*404b540aSrobert 54*404b540aSrobert template<class _Tp1, class _Tp2> 55*404b540aSrobert struct tuple_element<0, std::pair<_Tp1, _Tp2> > 56*404b540aSrobert { typedef _Tp1 type; }; 57*404b540aSrobert 58*404b540aSrobert template<class _Tp1, class _Tp2> 59*404b540aSrobert struct tuple_element<1, std::pair<_Tp1, _Tp2> > 60*404b540aSrobert { typedef _Tp2 type; }; 61*404b540aSrobert 62*404b540aSrobert 63*404b540aSrobert template<int _Int> struct __pair_get; 64*404b540aSrobert 65*404b540aSrobert template<> 66*404b540aSrobert struct __pair_get<0> 67*404b540aSrobert { 68*404b540aSrobert template<typename _Tp1, typename _Tp2> 69*404b540aSrobert static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair) 70*404b540aSrobert { return __pair.first; } 71*404b540aSrobert 72*404b540aSrobert template<typename _Tp1, typename _Tp2> 73*404b540aSrobert static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair) 74*404b540aSrobert { return __pair.first; } 75*404b540aSrobert }; 76*404b540aSrobert 77*404b540aSrobert template<> 78*404b540aSrobert struct __pair_get<1> 79*404b540aSrobert { 80*404b540aSrobert template<typename _Tp1, typename _Tp2> 81*404b540aSrobert static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair) 82*404b540aSrobert { return __pair.second; } 83*404b540aSrobert 84*404b540aSrobert template<typename _Tp1, typename _Tp2> 85*404b540aSrobert static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair) 86*404b540aSrobert { return __pair.second; } 87*404b540aSrobert }; 88*404b540aSrobert 89*404b540aSrobert template<int _Int, class _Tp1, class _Tp2> 90*404b540aSrobert inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& 91*404b540aSrobert get(std::pair<_Tp1, _Tp2>& __in) 92*404b540aSrobert { return __pair_get<_Int>::__get(__in); } 93*404b540aSrobert 94*404b540aSrobert template<int _Int, class _Tp1, class _Tp2> 95*404b540aSrobert inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& 96*404b540aSrobert get(const std::pair<_Tp1, _Tp2>& __in) 97*404b540aSrobert { return __pair_get<_Int>::__const_get(__in); } 98*404b540aSrobert 99*404b540aSrobert_GLIBCXX_END_NAMESPACE 100*404b540aSrobert} 101*404b540aSrobert 102*404b540aSrobert#endif 103