SpecialValues.h

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/* Copyright (C) 2011, Bernd Speiser */
/* This file is part of Quantity.

Quantity 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.

Quantity 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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
*/

#ifndef _SpecialValues_h
#define _SpecialValues_h

// Quantity includes
#include "Quantities/Quantity/Constant.h"
#include "Quantities/Quantity/UniqueConstant.h"

namespace quantity {


template<typename Q> struct SpecialValues;



template<template<typename, typename> class M, typename QT, typename ST,
                                              typename DQSU, typename DQT>
  struct SpecialValues<M<Quantity<QT, ST>, DerivedQuantity<QT, DQSU, DQT> > >
  {
    static const Constant<Quantity<QT,ST>, DerivedQuantity<QT, DQSU, DQT> >
      unity (void) 
    {return Constant<Quantity<QT,ST>, DerivedQuantity<QT, DQSU, DQT> > (1);}
    static const Constant<Quantity<QT,ST>, DerivedQuantity<QT, DQSU, DQT> >
      zero (void) {return Constant<Quantity<QT,ST>, 
                                     DerivedQuantity<QT, DQSU, DQT> > (0);}
    static const Constant<Quantity<QT,ST>, DerivedQuantity<QT, DQSU, DQT> >
      NaN (void) {return Constant<Quantity<QT,ST>, 
       DerivedQuantity<QT, DQSU, DQT> > 
                           (std::numeric_limits<ST>::signaling_NaN ());}
    static const Constant<Quantity<QT,ST>, DerivedQuantity<QT, DQSU, DQT> >
      infinity (void) {return Constant<Quantity<QT,ST>, 
       DerivedQuantity<QT, DQSU, DQT> > 
                           (std::numeric_limits<ST>::infinity ());}
  };



template<typename QT, typename ST, typename DQSU, typename DQT>
  struct SpecialValues<UniqueConstant<Quantity<QT, ST>, 
                                      DerivedQuantity<QT, DQSU, DQT> > >;

} // end namespace quantity

#endif /* _SpecialValues_h */

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