103 lines
3.3 KiB
C++
103 lines
3.3 KiB
C++
// TR1 utility -*- C++ -*-
|
|
|
|
// Copyright (C) 2004, 2005, 2006, 2007 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 tr1/utility
|
|
* This is a TR1 C++ Library header.
|
|
*/
|
|
|
|
#ifndef _TR1_UTILITY
|
|
#define _TR1_UTILITY 1
|
|
|
|
#include "../utility"
|
|
|
|
namespace std
|
|
{
|
|
_GLIBCXX_BEGIN_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>
|
|
const int tuple_size<std::pair<_Tp1, _Tp2> >::value;
|
|
|
|
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>
|
|
inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
|
|
get(std::pair<_Tp1, _Tp2>& __in)
|
|
{ return __pair_get<_Int>::__get(__in); }
|
|
|
|
template<int _Int, class _Tp1, class _Tp2>
|
|
inline const typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&
|
|
get(const std::pair<_Tp1, _Tp2>& __in)
|
|
{ return __pair_get<_Int>::__const_get(__in); }
|
|
|
|
_GLIBCXX_END_NAMESPACE
|
|
}
|
|
|
|
#endif
|