// TR1 utility -*- C++ -*- // Copyright (C) 2004-2013 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 3, 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. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // . /** @file tr1/utility * This is a TR1 C++ Library header. */ #ifndef _GLIBCXX_TR1_UTILITY #define _GLIBCXX_TR1_UTILITY 1 #pragma GCC system_header #include #include #include namespace std _GLIBCXX_VISIBILITY(default) { namespace tr1 { _GLIBCXX_BEGIN_NAMESPACE_VERSION template class tuple_size; template class tuple_element; // Various functions which give std::pair a tuple-like interface. template struct tuple_size > { static const int value = 2; }; template const int tuple_size >::value; template struct tuple_element<0, std::pair<_Tp1, _Tp2> > { typedef _Tp1 type; }; template struct tuple_element<1, std::pair<_Tp1, _Tp2> > { typedef _Tp2 type; }; template struct __pair_get; template<> struct __pair_get<0> { template static _Tp1& __get(std::pair<_Tp1, _Tp2>& __pair) { return __pair.first; } template static const _Tp1& __const_get(const std::pair<_Tp1, _Tp2>& __pair) { return __pair.first; } }; template<> struct __pair_get<1> { template static _Tp2& __get(std::pair<_Tp1, _Tp2>& __pair) { return __pair.second; } template static const _Tp2& __const_get(const std::pair<_Tp1, _Tp2>& __pair) { return __pair.second; } }; template inline typename tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& get(std::pair<_Tp1, _Tp2>& __in) { return __pair_get<_Int>::__get(__in); } template 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_VERSION } } #endif // _GLIBCXX_TR1_UTILITY