Teuchos_PromotionTraits.hpp

Go to the documentation of this file.

// @HEADER
// ***********************************************************************
//
//                    Teuchos: Common Tools Package
//                 Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
// @HEADER
 
#ifndef _TEUCHOS_PROMOTION_TRAITS_HPP_
#define _TEUCHOS_PROMOTION_TRAITS_HPP_
 
#include "Teuchos_ConfigDefs.hpp"
 
namespace Teuchos {
 
template <class A, class B>
class PromotionTraits
{
public:
};
 
//Specialization
template <class T> class PromotionTraits<T,T> {
public:
  typedef T promote;
};
 
#define PT_SPEC(type1,type2,type3) \
template <> class PromotionTraits< type1 , type2 > { \
public: \
    typedef type3 promote; \
}; \
template <> class PromotionTraits< type2 , type1 > { \
public: \
    typedef type3 promote; \
};
 
#ifdef HAVE_TEUCHOS_COMPLEX
PT_SPEC(double,std::complex<float>,std::complex<double>)
PT_SPEC(float,std::complex<double>,std::complex<double>)
PT_SPEC(float,std::complex<float>,std::complex<float>)
PT_SPEC(double,std::complex<double>,std::complex<double>)
#endif // HAVE_TEUCHOS_COMPLEX
PT_SPEC(double,float,double)
PT_SPEC(double,long,double)
PT_SPEC(double,int,double)
PT_SPEC(float,long,float)
PT_SPEC(float,int,float)
 
// ToDo: Add specializations for extended precision types!
 
#undef PT_SPEC
 
} // Teuchos namespace
 
#endif // _TEUCHOS_PROMOTION_TRAITS_HPP_