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// TR1 utility -*- C++ -*- |
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// Copyright (C) 2004-2021 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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|
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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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|
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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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|
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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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|
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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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|
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template<int _Int, class _Tp> |
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class tuple_element; |
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|
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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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|
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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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|
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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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|
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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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|
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template<int _Int> |
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struct __pair_get; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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_GLIBCXX_END_NAMESPACE_VERSION |
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} |
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|
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#endif // _GLIBCXX_TR1_UTILITY |
