Commit 26bea3cb authored by Dennis Gläser's avatar Dennis Gläser
Browse files

implement promoted type

parent 83c5abc2
install(FILES
math.hh
promotedtype.hh
DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/frackit/common)
// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*****************************************************************************
* See the file COPYING for full copying permissions. *
* *
* This program 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 of the License, or *
* (at your option) any later version. *
* *
* This program 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 program. If not, see <http://www.gnu.org/licenses/>. *
*****************************************************************************/
/*!
* \file
* \brief Determines the type that results from arithmetic
* operations on two different number types.
*/
#ifndef FRACKIT_PROMOTED_TYPE_HH
#define FRACKIT_PROMOTED_TYPE_HH
#include <utility>
namespace Frackit {
/*!
* \brief Determines the type that results from arithmetic
* operations on two different number types.
*/
template<class T1, class T2>
struct PromotionTraits
{
typedef decltype(std::declval<T1>()+std::declval<T2>()) PromotedType;
};
// Specialization for the case of two equal types
template<class T1>
struct PromotionTraits<T1,T1> { typedef T1 PromotedType; };
/*!
* \brief Convenience alias to get the promoted type
*/
template<class T1, class T2>
using PromotedType = typename PromotionTraits<T1, T2>::PromotedType;
} // end namespace Frackit
#endif // FRACKIT_PROMOTED_TYPE_HH
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment