109 lines
3.1 KiB
C++
109 lines
3.1 KiB
C++
// TR1 utility -*- C++ -*-
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// Copyright (C) 2004-2020 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 3, 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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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file tr1/utility
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* This is a TR1 C++ Library header.
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*/
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#ifndef _GLIBCXX_TR1_UTILITY
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#define _GLIBCXX_TR1_UTILITY 1
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#pragma GCC system_header
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#include <bits/c++config.h>
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#include <bits/stl_relops.h>
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#include <bits/stl_pair.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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namespace tr1
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{
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template<class _Tp>
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class tuple_size;
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template<int _Int, class _Tp>
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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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{ static const int value = 2; };
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template<class _Tp1, class _Tp2>
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const int
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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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template<int _Int>
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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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template<int _Int, class _Tp1, class _Tp2>
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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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template<int _Int, class _Tp1, class _Tp2>
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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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}
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_GLIBCXX_END_NAMESPACE_VERSION
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}
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#endif // _GLIBCXX_TR1_UTILITY
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