1169691Skan// Internal header for TR1 complex -*- C++ -*- 2169691Skan 3169691Skan// Copyright (C) 2006 Free Software Foundation, Inc. 4169691Skan// 5169691Skan// This file is part of the GNU ISO C++ Library. This library is free 6169691Skan// software; you can redistribute it and/or modify it under the 7169691Skan// terms of the GNU General Public License as published by the 8169691Skan// Free Software Foundation; either version 2, or (at your option) 9169691Skan// any later version. 10169691Skan 11169691Skan// This library is distributed in the hope that it will be useful, 12169691Skan// but WITHOUT ANY WARRANTY; without even the implied warranty of 13169691Skan// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14169691Skan// GNU General Public License for more details. 15169691Skan 16169691Skan// You should have received a copy of the GNU General Public License along 17169691Skan// with this library; see the file COPYING. If not, write to the Free 18169691Skan// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19169691Skan// USA. 20169691Skan 21169691Skan// As a special exception, you may use this file as part of a free software 22169691Skan// library without restriction. Specifically, if other files instantiate 23169691Skan// templates or use macros or inline functions from this file, or you compile 24169691Skan// this file and link it with other files to produce an executable, this 25169691Skan// file does not by itself cause the resulting executable to be covered by 26169691Skan// the GNU General Public License. This exception does not however 27169691Skan// invalidate any other reasons why the executable file might be covered by 28169691Skan// the GNU General Public License. 29169691Skan 30169691Skan/** @file tr1/common.h 31169691Skan * This is a TR1 C++ Library header. 32169691Skan */ 33169691Skan 34169691Skan#ifndef _TR1_COMMON_H 35169691Skan#define _TR1_COMMON_H 1 36169691Skan 37169691Skan#include <tr1/type_traits> 38169691Skan 39169691Skan// namespace std::tr1 40169691Skannamespace std 41169691Skan{ 42169691Skan_GLIBCXX_BEGIN_NAMESPACE(tr1) 43169691Skan 44169691Skan template<typename _Tp, bool = is_integral<_Tp>::value> 45169691Skan struct __promote 46169691Skan { typedef double __type; }; 47169691Skan 48169691Skan template<typename _Tp> 49169691Skan struct __promote<_Tp, false> 50169691Skan { typedef _Tp __type; }; 51169691Skan 52169691Skan template<typename _Tp, typename _Up> 53169691Skan struct __promote_2 54169691Skan { 55169691Skan private: 56169691Skan typedef typename __promote<_Tp>::__type __type1; 57169691Skan typedef typename __promote<_Up>::__type __type2; 58169691Skan 59169691Skan public: 60169691Skan typedef __typeof__(__type1() + __type2()) __type; 61169691Skan }; 62169691Skan 63169691Skan template<typename _Tp, typename _Up, typename _Vp> 64169691Skan struct __promote_3 65169691Skan { 66169691Skan private: 67169691Skan typedef typename __promote<_Tp>::__type __type1; 68169691Skan typedef typename __promote<_Up>::__type __type2; 69169691Skan typedef typename __promote<_Vp>::__type __type3; 70169691Skan 71169691Skan public: 72169691Skan typedef __typeof__(__type1() + __type2() + __type3()) __type; 73169691Skan }; 74169691Skan 75169691Skan_GLIBCXX_END_NAMESPACE 76169691Skan} // namespace std 77169691Skan 78169691Skan#endif 79