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// Internal header for TR1 complex -*- C++ -*-
// Copyright (C) 2006 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/common.h
* This is a TR1 C++ Library header.
*/
#ifndef _TR1_COMMON_H
#define _TR1_COMMON_H 1
#include <tr1/type_traits>
// namespace std::tr1
namespace std
{
_GLIBCXX_BEGIN_NAMESPACE(tr1)
template<typename _Tp, bool = is_integral<_Tp>::value>
struct __promote
{ typedef double __type; };
template<typename _Tp>
struct __promote<_Tp, false>
{ typedef _Tp __type; };
template<typename _Tp, typename _Up>
struct __promote_2
{
private:
typedef typename __promote<_Tp>::__type __type1;
typedef typename __promote<_Up>::__type __type2;
public:
typedef __typeof__(__type1() + __type2()) __type;
};
template<typename _Tp, typename _Up, typename _Vp>
struct __promote_3
{
private:
typedef typename __promote<_Tp>::__type __type1;
typedef typename __promote<_Up>::__type __type2;
typedef typename __promote<_Vp>::__type __type3;
public:
typedef __typeof__(__type1() + __type2() + __type3()) __type;
};
_GLIBCXX_END_NAMESPACE
} // namespace std
#endif
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