GasConstant.h

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/* Copyright (C) 2002 - 2010, Bernd Speiser */

/* This file is part of Quantities.

PhysicalQuantities 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.

PhysicalQuantities 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 _GasConstant_h
#define _GasConstant_h

// Quantity includes
#include "Quantities/Quantity/UniqueConstant.h"
#include "Quantities/PhysicalQuantities/AmountOfSubstance.h"
#include "Quantities/PhysicalQuantities/Energy.h"
#include "Quantities/PhysicalQuantities/ThermodynamicTemperature.h"

namespace quantity {
  namespace gasConstant {

class Class;

class Unit;

/* the JoulePerKelvinMole and prefixed variants */

typedef unit::Component<energy::Units,
                               BSUtilities::Rational<1> > EnergyComponent;

typedef unit::Component<amountOfSubstance::Units,
                   BSUtilities::Rational<-1> > AmountOfSubstanceComponent;

typedef 
  unit::Component<thermodynamicTemperature::Units,
            BSUtilities::Rational<-1> > ThermodynamicTemperatureComponent;

typedef unit::ComposeBase<Unit, 
  Loki::Typelist<EnergyComponent, Loki::Typelist<AmountOfSubstanceComponent, 
    Loki::Typelist<ThermodynamicTemperatureComponent, Loki::NullType> > > >
                                                   GasConstantComposedUnit;

typedef unit::Composed<GasConstantComposedUnit, 
  Loki::Typelist<energy::Joule, Loki::Typelist<amountOfSubstance::Mole, 
    Loki::Typelist<thermodynamicTemperature::Kelvin, Loki::NullType> > > >
                                                          JoulePerKelvinMole;

typedef Loki::Typelist<GasConstantComposedUnit, Loki::NullType> Units;

/* GasConstant quantity */

typedef Quantity<Class> Quantity;

class DerivedGasConstant;

  } // end namespace gasConstant

template<>
  struct QuantityTraits<gasConstant::Class>
  {
    typedef
      dimension::Dimension<BSUtilities::Rational<2>,
        BSUtilities::Rational<1>, BSUtilities::Rational<-2>,
          BSUtilities::Rational<0>, BSUtilities::Rational<-1>,
            BSUtilities::Rational<-1>, BSUtilities::Rational<0> > Dimension;
    typedef gasConstant::Unit UnitType;
    typedef gasConstant::Units UnitList;
    typedef gasConstant::JoulePerKelvinMole DefaultUnit;

    typedef gasConstant::DerivedGasConstant DefaultDerivedQuantityType;

    static const std::string NameString ();
    static const std::string SymbolString ();

  };

// the derived quantity traits template for joule per Kelvin mole gas constant
template<>
  struct DerivedQuantityTraits<gasConstant::Class, gasConstant::DerivedGasConstant>
  {
    static const bool OverwriteName = false;
    static const bool OverwriteSymbol = false;

    static const std::string NameString ();
    static const std::string SymbolString ();

  };


typedef Loki::SingletonHolder<UniqueConstant <gasConstant::Quantity> > GasConstant;

#define GASCONSTANT GasConstant::Instance()

} // end namespace quantity

#endif /* _GasConstant_h */

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